start-ver=1.4 cd-journal=joma no-vol=21 cd-vols= no-issue=2 article-no= start-page=47 end-page=63 dt-received= dt-revised= dt-accepted= dt-pub-year=1987 dt-pub=19870305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Automatic Mesh Generator For 3-Dimensional Finite Element Analysis en-subtitle= kn-subtitle= en-abstract= kn-abstract=The aim of this paper is to propose new automatic mesh generator for the finite element analysis of threedimensional structures consisted of plates and beams. The strategy of the proposed one is as followings; Firstly, subdivide the structure into two-dimensional and one-dimensional structural components. Secondly, generate mesh pattern for each of them, and finally combine them so that they reconstruct the original configuration. By using the proposed method the modeling of, for example, steel bridge structures for Finite Element Analysis is easily and also fastly completed. Some examples of the application of the proposed method are presented, and from the examination of the results further important informations for the design of better method are also given in this paper. en-copyright= kn-copyright= en-aut-name=TaniguchiTakeo en-aut-sei=Taniguchi en-aut-mei=Takeo kn-aut-name=谷口健男 kn-aut-sei=谷口 kn-aut-mei=健男 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TsurumiYasuo kn-aut-sei=Tsurumi kn-aut-mei=Yasuo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Civil Engineering affil-num=2 en-affil= kn-affil=Department of Civil Engineering END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=23 end-page=28 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A New Model for Structure of Poly (ethylene terephthalate) in its Glassy State en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new realistic, structural model is proposed for the glassy solid state of poly(ethylene terephthalate) (PET). The model is considered basing on crystallization behaviors from the glassy state of PET, and in particular including the evidence from the estimation of chain folding energy in this report. When PET is quenched from its melt into the glassy state, irregular folds with lower conformational energy remain in glassy structure and disturb the three dimensional arrangement of the chains connected with the folds. In conclusion, we suggested that the structure of glassy PET is not in amorphous state which is represented by the interpenetrating random coil model, but in frozen metastable state which can be approached from the chain folded structure of polymer crystals. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamashitaYuhiko kn-aut-sei=Yamashita kn-aut-mei=Yuhiko aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=133 end-page=152 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Aging and Reversion in Dilute Al-Ag Alloys en-subtitle= kn-subtitle= en-abstract= kn-abstract=Aging and reversion in dilute Al-Ag alloys are studied by means of the measurements of electrical resistivity. Results obtained are as follows: 1) Increase in the as-quenched resistivity is found for a low quenching temperature. This increase may be due to the fluctuation of solute concentration at the quenching temperature. 2) When the fluctuation exists in the alloy, the aging rate becomes slow and the maximum resistivity in the isothermal aging curve becomes small as the vacancyconcentration becomes low. The maximum resistivity becomes large again when the vacancy concentration becomes further lower, and finally the maximum does not appear. 3) These behaviors are explained in terms of the difference in the rate of growth of the G.P. zones in the regions of higher and lower solute concentration induced by the fluctuation and in terms of the change of this difference with vacancy concentration. 4) G.P. zones may be formed by the spinodal decomposition with indefinite surfaces at first, grown to larger ones with difinite surfaces and changed to ordered nzones in the alloy. 5) It is confirmed that G.P. zones are formed by the nucleation-and-growth mechanism also in Al-Ag alloys above the spinodal temperature. en-copyright= kn-copyright= en-aut-name=OhtaMutsuo en-aut-sei=Ohta en-aut-mei=Mutsuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KanadaniTeruto en-aut-sei=Kanadani en-aut-mei=Teruto kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=YamadaMasuo en-aut-sei=Yamada en-aut-mei=Masuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SakakibaraAkira en-aut-sei=Sakakibara en-aut-mei=Akira kn-aut-name=榊原精 kn-aut-sei=榊原 kn-aut-mei=精 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Okayama University of Science affil-num=3 en-affil= kn-affil=Department of Industrial Science affil-num=4 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=29 end-page=36 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Parameters for Analysis on Distributed Circuit Properties of Etched Alunimum Oxide Film en-subtitle= kn-subtitle= en-abstract= kn-abstract=The distributed circuit properties based on pores in the etched aluminum oxide film of the electrolytic capacitor have been analysed by the mathematical equation. This paper proposes the selection and the determining method of the parameters appearing in the analysis. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoTatsuma kn-aut-sei=Yamamoto kn-aut-mei=Tatsuma aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoYoshitake kn-aut-sei=Yamamoto kn-aut-mei=Yoshitake aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishidaHideki kn-aut-sei=Nishida kn-aut-mei=Hideki aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YasuharaKiyotaka kn-aut-sei=Yasuhara kn-aut-mei=Kiyotaka aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering. affil-num=2 en-affil= kn-affil=Department of Electrical Engineering. affil-num=3 en-affil= kn-affil=Faculty of Education, Tottori University. affil-num=4 en-affil= kn-affil=Department of Electrical Engineering. END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=153 end-page=162 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Coupling-Network Dependence of Locking Phenomena in Microwave Oscillators en-subtitle= kn-subtitle= en-abstract= kn-abstract=A unified treatment of injection and mutual phase locking phenomena in microwave oscillators coupled by a network characterized by a Y-matrix is presented. Under certain simplifying assumptions, steady state solutions such as locking frequency and oscillation phase relation are given with emphasis placed on the coupling-network dependence of locking bandwidth. Also, some examples of locking system specified by y(21)=0, Y(21)= Y(12) and y21= -Y12 are briefly discussed. en-copyright= kn-copyright= en-aut-name=FukuiKiyoshi en-aut-sei=Fukui en-aut-mei=Kiyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NogiShigeji en-aut-sei=Nogi en-aut-mei=Shigeji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=YamadaMasuo en-aut-sei=Yamada en-aut-mei=Masuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SakakibaraAkira en-aut-sei=Sakakibara en-aut-mei=Akira kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics affil-num=3 en-affil= kn-affil=Department of Electronics affil-num=4 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=163 end-page=180 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Walsh Waoofonn Analyzer and Its Applications to Filtering of Pulse Signals en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new waveform analyzer based on the Walsh transform　is developed and is applied to a real-time filtering of fast pulse signals, and the linear filterings　of time signals through the Walsh transform is　discussed. The analyzer converts a solitary waveform during 16 μs into the 16 Walsh amplitude spectra in a hybrid manner: it has the sequency band from 62.5 kzps to 500 kzps. The spectra are parallelly held during 16 μs by analog integrators, while serially displayed by the CRT, and one of them is digitally read out. The spectra of the test waves are measured within the error rate of several per cent. The analyzer is applied to the correlative detection of the photoelectric pulse signals in a gasspectroscopic system using a pulse laser, and there composes the matched filter, which is useful for measuring the signals superposed by Gaussian noises with a high accuracy. For the real-time filtering of fast signals, the arithmetic convolution and the frequency power spectra are approximated using the complex Walsh transform. These approximations are of practical use in 16 or 32 dimensions. Then, the matched filters for pulse peaking are given by the approximate convolution and by the dyadic convolution. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanadaYoshihiro kn-aut-sei=Tanada kn-aut-mei=Yoshihiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SanoHiroya kn-aut-sei=Sano kn-aut-mei=Hiroya aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=45 end-page=52 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Behavior of Transistor Switching in AC Chopper Circuit en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, an AC chopper circuit, using a power transistor, is described which chops the AC voltage with a commercial frequency. The circuit is composed of a diode bridge and a power transistor in series with a load and capable of adjusting the switching frequency, fc, and the time ratio, T=ton/(ton+toff). The switching frequency and the time ratio of the AC chopper circuit depend on switching-times, that is, delay time, rise time, carrier storage time and fall time, especially in the high frequency. The upper limit of the switching frequency (about 150kHz) and the output characteristics of the circuit are investigated. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSenichiro kn-aut-sei=Nakanishi kn-aut-mei=Senichiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FunabikiShigeyuki kn-aut-sei=Funabiki kn-aut-mei=Shigeyuki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering. affil-num=2 en-affil= kn-affil=Department of Electrical Engineering. affil-num=3 en-affil= kn-affil=Department of Electrical Engineering. END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=53 end-page=58 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Driving Method of a Spuare Waveform Inverter Circuit Using Power Transistors en-subtitle= kn-subtitle= en-abstract= kn-abstract=In recent years, the development of a high power transistor element is proceeding. A high power inverter circuit using power transistors are finding a good number of applications in induction heating and melting. Turn off time of power transistors occupies 5-lOμs of switching characteristics. A driving method to give base inputs for a half period is widely used for a inverter circuit. But this method has the following defects, the short-circuit current flows through two transistors because the other pair transistors turn on before one pair transistors turn off. So the switching loss is increased, the maximum output and the efficiency are decreased. In this paper, a driving method to give base inputs for the less period as compared with a half period is discussed. Using this method, the foregoing defects is lost and the driving frequency is able to become higher. In addition, it become clear that the square waveform output is given using this method in the case of R-L load. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AgusaToru kn-aut-sei=Agusa kn-aut-mei=Toru aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering. affil-num=2 en-affil= kn-affil=Graduate School of Electrical Engineering. END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=181 end-page=193 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Notion of Adjoint Spectrum in the Application to Air-pollution Monitoring en-subtitle= kn-subtitle= en-abstract= kn-abstract=This report deals with a notion of adjoint spectrum which is applicable to air-pollution monitoring by using pulsed lasers. Both Raman and absorption spectra of multiple gas complex are linear combinations of the spectra, each of which is specific to a gas species and its magnitude is proportional to the density. An extended formulation of the method of least squares is made in terms of a new notion, adjoint spectra, which visualizes the structure of the numerical filter. Applications of the derived numerical filters to the two methods are shown and features are described about the synthesized filters. en-copyright= kn-copyright= en-aut-name=SanoHiroya en-aut-sei=Sano en-aut-mei=Hiroya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name=古賀隆治 kn-aut-sei=古賀 kn-aut-mei=隆治 aut-affil-num=2 ORCID= en-aut-name=TanadaYoshihiro en-aut-sei=Tanada en-aut-mei=Yoshihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KosakaMegumi en-aut-sei=Kosaka en-aut-mei=Megumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of electronics affil-num=2 en-affil= kn-affil=Department of electronics affil-num=3 en-affil= kn-affil=Department of electronics affil-num=4 en-affil= kn-affil=Department of electronics END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=195 end-page=207 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Performance Analysis For An Air-Pollution Monitoring Using A Pulsed Dye Laser en-subtitle= kn-subtitle= en-abstract= kn-abstract=The maximally attainable accuracy of an airpollution monitoring system is investigated. The system is composed of a tunable pulsed dye laser as the light source, photodiodes as the opto-electric converter and a low noise electronic signal processor specifically designed by the authors. The extreme value of the accuracy is given in terms of the standard deviation of the attenuation. The value is 3.4×10(-4)[Nep√(pulse number)] for an averaged value for multiple laser shots. Also the wavelength reproduceability of a dye laser was examined, which resulted in that a computer should take a part in the wavelength control in order that this method should be feasible. en-copyright= kn-copyright= en-aut-name=SanoHiroya en-aut-sei=Sano en-aut-mei=Hiroya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name=古賀隆治 kn-aut-sei=古賀 kn-aut-mei=隆治 aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanadaYoshihiro kn-aut-sei=Tanada kn-aut-mei=Yoshihiro aut-affil-num=3 ORCID= en-aut-name=KosakaMegumi en-aut-sei=Kosaka en-aut-mei=Megumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of electronics affil-num=2 en-affil= kn-affil=Department of electronics affil-num=3 en-affil= kn-affil=Department of electronics affil-num=4 en-affil= kn-affil=Department of electronics END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=209 end-page=218 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Lower Bounds for Thermodynmnic Quantities of Classical Ionic Mixtures en-subtitle= kn-subtitle= en-abstract= kn-abstract=Exact lower bounds are given for thermodynamic quantities of ionic mixtures in the uniform background in d dimensions with three-dimensional (1/r) Coulomb interaction (d=2 and 3) and with d-dimensional Coulomb interaction (d=1, 2, and 3). It is shown that these lower bounds improve upon known ones and give values close to experimental results which are available in the case of d=3. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TotsujiHiroo kn-aut-sei=Totsuji kn-aut-mei=Hiroo aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=59 end-page=75 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Fluctuation of the Solute Concentration in Al Rich Al-Zn Alloys en-subtitle= kn-subtitle= en-abstract= kn-abstract=Several Al-Zn alloys containing 0.041-4.4 at % Zn were studied by means of measurements of electrical resistivity. The results obtained are as follows : (1) The electrical resistivity increases when the specimen is annealed at temperatures higher than the solvus temperature of the G.P. zones. The increase of the resistivity is due to the formation of fluctuation. (2) The electrical resistivity of the specimen containing fluctuation is dependent upon annealing temperature only and independent of quenching temperature. (3) The fluctuation is formed in very dilute alloys as 0.041 at % Zn at temperatures higher than the solvus temperature of the G.P. zones. (4) The formation energy of vacancy and the migration energy of the Zn atom in the alloys determined by the formation process of fluctuation are in good agreement with those by the formation process of G.P. zones. (5) In spite of the result (4), it seems that the fluctuation is not the same as the small G.P. zones which are observed in the early stage of aging. en-copyright= kn-copyright= en-aut-name=OhtaMutsuo en-aut-sei=Ohta en-aut-mei=Mutsuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KanadaniTeruto en-aut-sei=Kanadani en-aut-mei=Teruto kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=SakakibaraAkira en-aut-sei=Sakakibara en-aut-mei=Akira kn-aut-name=榊原精 kn-aut-sei=榊原 kn-aut-mei=精 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science. affil-num=2 en-affil= kn-affil=Graduate School of Industrial Science affil-num=3 en-affil= kn-affil=Department of Industrial Science. END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=219 end-page=224 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Longitudinal Properties of Two-Dimensional Classical Electron Liquids en-subtitle= kn-subtitle= en-abstract= kn-abstract=The dynamic form factor and the dispersion relation of the plasma oscillation of two-dimensional classical systems of electrons with ordinary Coulomb interaction are obtained by numerical experiments in the domain of the plasma parameter 2.24≤√=(πn)(1/2)e(2)/T≤70.7, where n, e, and T are the areal number density, the electronic charge, and the temperature in energy units, respectively. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TotsujiHiroo kn-aut-sei=Totsuji kn-aut-mei=Hiroo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KakeyaHideyuki kn-aut-sei=Kakeya kn-aut-mei=Hideyuki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=77 end-page=88 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Apparent Activation Energy for Clustering in Dilute Al-Zn Alloys en-subtitle= kn-subtitle= en-abstract= kn-abstract=The clustering phenomenon was observed when dilute Al-Zn alloys were annealed at temperatures higher than the solvus of the G.P.zones. In this report the apparent activation energy for clustering is estimated and compared with the experimental results. The estimated value of the apparent activation energy for clustering in several Al-Zn alloys comes to 0.51 eV, which is larger than the effective migration energy 0.43 eV of Zn atoms in Al-Zn alloys. en-copyright= kn-copyright= en-aut-name=OhtaMutsuo en-aut-sei=Ohta en-aut-mei=Mutsuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KobayashiToshinori en-aut-sei=Kobayashi en-aut-mei=Toshinori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=SakakibaraAkira en-aut-sei=Sakakibara en-aut-mei=Akira kn-aut-name=榊原精 kn-aut-sei=榊原 kn-aut-mei=精 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Graduate School of Industrial Science affil-num=3 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=225 end-page=238 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An Adaptive Observer via Optimal Control Law en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with the adaptive observer which estimates the states and parameters of unknown system. It is shown that the adaptive observer problem is reduced to the identification of the transformation matrix for an arbitrary designable observer. Moreover, the adaptive process of the unknown parameters is reduced to the linear optimal regulator problem. As the result, a new method is presented to obtain an appropriate adaptive process with good insight. And, in this identification, a linear filter is found to be also useful against noises in input-output data. To achieve high accuracy, a particular nonlinear filtering can improve SN ratio only in the direction of the unknown vector. Even if SN ratio of input-output data has zero dB, sufficient accuracy can be accomplished within suitable correction time. This design algorithm seems to be rather straightforward and practical. Since input sequence is required to be only sufficiently general, the method is applicable to on-line identification also. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KanedaMasahiro kn-aut-sei=Kaneda kn-aut-mei=Masahiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShinjiHiroshi kn-aut-sei=Shinji kn-aut-mei=Hiroshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AoyamaMikio kn-aut-sei=Aoyama kn-aut-mei=Mikio aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Nissan Chemical Corp affil-num=3 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=239 end-page=248 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A GRAPH-THEORETIC STUDY OF THE MINIMUM FILL-IN PROBLEM FOR SPARSE MATRIX METHOD en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper the minimum fill-in problem which arises at the application of the sparse matrix method for linear sparse systems is discussed from the graphtheoretic viewpoint and the author gives some results which can be directly introduced in the design of, so called, the optimal elimination ordering algorithm which gives the minimum fill-in(the number of zeros in coefficient matrix which become non-zero during the elimination process). Through this investigation only graphs are treated instead of the coefficient matrices for linear systems, and the elimination process for a matrix is equivalated to the vertx eliminations for the graph. Then, the results by the theoretical investigation are summarized as following: 1. Optimal elimination for each subgraph which is subdivided appropriately from whole graph leads to the global optimum. 2. In each subgraph there are only two kind of eliminations. Furthermore, some numerical experiments show the characteristics of the subset of vertices, which subdivide a subgraph from the residual. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TaniguchiTakeo kn-aut-sei=Taniguchi kn-aut-mei=Takeo aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Civil Engineering END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=89 end-page=96 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Cluster Expansion for Two-Dimensional Electron Liquids en-subtitle= kn-subtitle= en-abstract= kn-abstract=The pair correlation function and the correlation energy density of two-dimensional electron liquids are calculated on the basis of the Salpeter's Debye-chain type expansion. When the two-dimensional plasma parameter (£=2πne4T-2) is small, the expansion to the first order gives the correlation energy to the order of (£21n£). It is shown that experimental results in the domain (£<0.5) can be reproduced by taking into account the first and the second order terms in this expansion. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TotsujiHiroo kn-aut-sei=Totsuji kn-aut-mei=Hiroo aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=97 end-page=128 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of Pump Test Data for Partial Penetrating wells en-subtitle= kn-subtitle= en-abstract= kn-abstract=The solutions of unsteady phreatic flow toward a partially penetrating well in an aquifer of finite thickness are described. Firstly the solution for a confined aquifer is shown. In this case,three methods of analyzing field data with partially penetrating well are given, that is, "Log-Log Method, Log-Log Distance Drawdown Method and Jacob's Method Ajusted for Partial Penetration". By using these methods the hydraulic conductivities and the specific storage of the aquifer may be determined. Secondly the solution for an,unconfined aquifer is shown. In this case, also two methods of analyzing field data with partially penetrating well are given. By using these methods, the anisotropic permeability and the storage coefficient (effective porosity) of the aquifer may be determined. Moreover in each case, the effects of partial penetration are discussed and the limits of adapting the Theis' and Jacob's methods are setted. From these analytic results, some cosiderations are added to determine the anisotropy of permeability and to evaluate the storage coefficient. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonoIichiro kn-aut-sei=Kono kn-aut-mei=Iichiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishigakiMakoto kn-aut-sei=Nishigaki kn-aut-mei=Makoto aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Depertment of Civil Engineering affil-num=2 en-affil= kn-affil=Depertment of Civil Engineering END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=249 end-page=258 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Asymptotic Theory of Rayleigh Problem in Rarefied Gas en-subtitle= kn-subtitle= en-abstract= kn-abstract=The asymptotic theory of Rayleigh shear flow for large values of time is developed on the basis of the linearized Boltzmann-Krook equation. Asymptotic equations for mean velocity outside the Knudsen layer are obtained by employing the Hilbert expansion. Slip boundary conditions are derived from the analysis of the Knudsen layer adjacent to the wall. A solution of the asymptotic equation is obtained under the slip boundary condition and zero initial condition. Discussions are also made of the flow induced by a slowly oscillating flat plate. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoKyoji kn-aut-sei=Yamamoto kn-aut-mei=Kyoji aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Engineering Mathematics END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=129 end-page=139 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Statistical Analysis of Traffic Accidents in Minor Street Network en-subtitle= kn-subtitle= en-abstract= kn-abstract=A statistical analysis is applied to find what states of "block" are dangerous from view point of traffic accident. Here, the block is defined to be an area surrounded by some major streets and is feeded by a minor street network. The accidents under study are those which occur in the whole minor street network. They are grouped into three kinds; pedestrian, vehicle and the gross accidents. And each is classified to three types according to the place where the accident occurs. At the beginning 22 variables are assumed to state a certain relationship of some states of the block with the occurrences of accidents and 12 variables are found significant finally through factor analysis. Further examination has reached several key variables that migth have something significant to cause traffic accidents in the block. The key ones are the number of lanes of street and the number of legs of intersection, especially nearly 2 lanes street and 3-leg intersection, respectively. The case study was carried out on 26 blocks sampled from Osaka City. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MyojinSyo kn-aut-sei=Myojin kn-aut-mei=Syo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TatsutaAkira kn-aut-sei=Tatsuta kn-aut-mei=Akira aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakaYasuhisa kn-aut-sei=Taka kn-aut-mei=Yasuhisa aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AsaiKazuhiko kn-aut-sei=Asai kn-aut-mei=Kazuhiko aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Dept. of Civil Eng., School of Eng., Okayama Univ. affil-num=2 en-affil= kn-affil=Dept. of Transpn. Eng., Faculty of Eng., Kyoto Univ. affil-num=3 en-affil= kn-affil=Ministry of Construction affil-num=4 en-affil= kn-affil=Dept. of Civil Eng., School of Eng., Okayama Univ. END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=1 end-page=7 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Molecular Mechanism of Chain Tilt in Poly (ethylene terephthalate) Fibers en-subtitle= kn-subtitle= en-abstract= kn-abstract=The molecular mechanism of chain tilt in poly(ethylene terephthalate) (PET) fibers was proposed. The mechanism was considered basing on the ordering process from the cold drawn state of glassy PET. It was confirmed that the direction of maximum contraction on ordering agrees with the azimuth of chain tilt which varies with annealing temperature. In the stacking structure of irregular folded chain blocks of cold drawn PET, the expansion to the chain direction and the contraction to the lateral direction yield the compressive stress and tensile stress r respectively. The stress revealed as the result of the ordering from the glassy structure to crystalline structure can be relaxed by the rotation of the resulting crystallites. Therefore, we can suggest that the chain tilt is caused by the relaxation process of the stress. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamashitaYuhiko kn-aut-sei=Yamashita kn-aut-mei=Yuhiko aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=9 end-page=14 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Oriented Crystallization of Polyethylene at High Pressure from Flowed Melt en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the course of the study of polymer crystallization at high pressure, oriented crystallization of extended chain crystals of polyethylene were examined. Molten polyethylene were extruded into a die at a few hundred atm, and follwed by crystallization by high pressure application above 3000 atm. Resulting sample shows chain orientation to extruded direction. Thick lamella nearly a few thousand angstrom, which are typical feature of high pressure crystallization, were observed to be stacked parallel each other. In spite of favorable condition for crystals to grow to chain direction, remarkable growth to normal direction to them were also observed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraYasuo kn-aut-sei=Fujiwara kn-aut-mei=Yasuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=15 end-page=28 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Iron Losses of Silicon Steel due to Rotating Fluxes (Inclined Rotating Flux and Distorted One) en-subtitle= kn-subtitle= en-abstract= kn-abstract=Characteristics of iron losses in silicon steel due to inclined rotating fluxes and distorted ones are described. Iron losses due to rotating fluxes have been measured at various conditions for grain-oriented and non-oriented silicon steels by using an improved thermistor-bridge method. Loss measurements indicate that the iron loss due to the inclined rotating flux is greater than that due to the non-inclined one. However, the iron loss due to the distorted rotating flux is not always greater than that due to the non-distorted one. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiNorio kn-aut-sei=Takahashi kn-aut-mei=Norio aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=1 end-page=12 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19800301 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Analysis of Vocational Aptitude Changing with Age en-subtitle= kn-subtitle= en-abstract= kn-abstract=The assumption that vocational aptitude changed with age and with the kind of occupation was examined from the tendency of the fitted curve for the score of the aptitude test. 9 vocational aptitudes were measured by the general vocational aptitude test by Japan Labor Ministry. Subjects were 382 male workers (design engineers, turners, welders, can manufacturing workers, and crane operators) of from 20 to 59 years old, and 348 male and female students (junior high school, vocational school, and university) of from 15 to 19 years old. The design engineers' aptitudes advanced along the quadratic curve until 31 years old, but almost all the aptitudes of the other workers fell along the linear curve with age. The design engineers preserved various aptitudes until 52 years old, the turners 44, and the welders, the can manufacturing workers, and the crane operators 37. The students' aptitudes were equal to those of the workers of from 15 to 25 years old. The workers preserved Spatial aptitude and Numerical aptitude until 45 years old. This could be said in all the occupations here. Further it was made clear from the micromotion study that the influence of age was caused by therbligs en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaMasayuki kn-aut-sei=Wada kn-aut-mei=Masayuki aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OgawaKazuo kn-aut-sei=Ogawa kn-aut-mei=Kazuo aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AkagiFumio kn-aut-sei=Akagi kn-aut-mei=Fumio aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science, School of Engineering Okayama University. affil-num=2 en-affil= kn-affil=Department of Industrial Science, School of Engineering Okayama University. affil-num=3 en-affil= kn-affil=Department of Industrial Science, School of Engineering Okayama University. affil-num=4 en-affil= kn-affil=Department of Industrial Science, School of Engineering Okayama University. affil-num=5 en-affil= kn-affil=Department of Industrial Science, School of Engineering Okayama University. END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=29 end-page=37 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Dynamic Switching of Wall-Reattachment Fluidic Device en-subtitle= kn-subtitle= en-abstract= kn-abstract=Effect of the geometrical configuration of wall-reattachment fluidic device on the switching dynamics, the switching time, and its dispersion, was investigated experimentally by using a large scale model. The results obtained can be summarized as follows: 1) The switching time, its dispersion, and switching probability depend upon the connection of the input to the control port. 2) Effect of the vent and splitter on the jet in dynamic switching is explained commonly by using the margin of a given control flow rate to the switching control flow rate. 3) The switching time ,decreases as input increases, whereas its dispersion remains constant except for small input. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimizuAkira kn-aut-sei=Shimizu kn-aut-mei=Akira aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=DohtaShujiro kn-aut-sei=Dohta kn-aut-mei=Shujiro aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Okayama College of Science END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=39 end-page=53 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Behaviors of a Soliton in Nonlinear L-C Lines with Abrupt Parameter Change en-subtitle= kn-subtitle= en-abstract= kn-abstract=Some behaviors of a lattice soliton in nonlinear L-C ladder lines with abrupt parameter change are investigated. The results of computer and circuit experiments show that in the case of a soliton incident upon the line of larger characteristic impedance and of higher phase velocity in linearized-line-limit, the transmitted wave evolves into larger number of solitons. The experimental results can be well explained by use of both linearization approximation for the line near the junction and the theory by Gardner, Greene, Kruskal and Miura. en-copyright= kn-copyright= en-aut-name=NogiShigeji en-aut-sei=Nogi en-aut-mei=Shigeji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=FukuiKiyoshi en-aut-sei=Fukui en-aut-mei=Kiyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=55 end-page=60 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Absorption Spectrum Measurement for Atmospheric Level Nitric Monoxide in γ-0 Band and Its Density Deduction en-subtitle= kn-subtitle= en-abstract= kn-abstract=An absorption spectrum of γ-0 band of nitric monoxide of very dilute density was taken. An experimental electronic device showed a distinguishing power of 0.01 ppm through 10 m optical pathlength. By the aid of a data processing based on a principle developed by the authors, this sensitivity does not suffer from coexisting sulfur dioxide, which shares the absorption band with the nitric monoxide. en-copyright= kn-copyright= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name=古賀隆治 kn-aut-sei=古賀 kn-aut-mei=隆治 aut-affil-num=1 ORCID= en-aut-name=HiraoKeiji en-aut-sei=Hirao en-aut-mei=Keiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KosakaMegumi en-aut-sei=Kosaka en-aut-mei=Megumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SanoHiroya en-aut-sei=Sano en-aut-mei=Hiroya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Graduate School of Electronics affil-num=3 en-affil= kn-affil=Department of Electronics affil-num=4 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=13 end-page=22 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19800301 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A High-powered Optoelectronic Switch with Picosecond Risetime en-subtitle= kn-subtitle= en-abstract= kn-abstract=A switch element has been developed so that a kilovolt step voltage should be supplied to a 50Ω transmission line with a subnanosecond rise time. The element is of silicon substrate with high purity and a pair of electrodes is attached by the evaporation process. The switch action is performed by the photoconductivity produced by the laser light pulse. This paper deals with a preliminary analysis, manufacturing processes and experimental results of the optoelectronic switch. A performance of 320V output with less than 4 ns risetime was obtained with sufficient persistence for more than 2×10(5) pulse shots. This switch was successfully applied to an optical waveform monitor for laser light pulses giving a resolution less than 2 ns. en-copyright= kn-copyright= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name=古賀隆治 kn-aut-sei=古賀 kn-aut-mei=隆治 aut-affil-num=1 ORCID= en-aut-name=EbaraMasami en-aut-sei=Ebara en-aut-mei=Masami kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KosakaMegumi en-aut-sei=Kosaka en-aut-mei=Megumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SanoHiroya en-aut-sei=Sano en-aut-mei=Hiroya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics. affil-num=2 en-affil= kn-affil=Department of Electronics. affil-num=3 en-affil= kn-affil=Department of Electronics. affil-num=4 en-affil= kn-affil=Department of Electronics. END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=61 end-page=94 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Application of Fininite Element Analysis to Groundwater Flow in Field Problems en-subtitle= kn-subtitle= en-abstract= kn-abstract=The purposes of this paper are primarily to research on behavior of groundwater flow in saturated and unsaturated zone and to develop the most effective methods for solving groundwater flow problems related to civil engineering practice. The mathematical model provides a finite element solution to two- or threedimensional problems involving transient flow in the saturated and unsaturated domains of nonhomogeneous, anisotropic porous media. Before progressing into the various levels of applications the input data and boundary conditions are discussed and evaluated. To demonstrate the flexibility of the finite element approach and its capability in treating complex situations which are often encountered in the field, the groundwater flow through sand bank at flood water levels and the flow through aquifer due to an excavation were analyzed. As the results there were good qualitative agreements between the numerical results and the informations received. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonoIichiro kn-aut-sei=Kono kn-aut-mei=Iichiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishigakiMakoto kn-aut-sei=Nishigaki kn-aut-mei=Makoto aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Depertment of Civil Engineering affil-num=2 en-affil= kn-affil=Depertment of Civil Engineering END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=23 end-page=31 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19800301 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Microcomputer Filtering System to Measure Very Small Transmission Loss of Impulsive Signals en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper describes a method for measuring very small transmission loss of impulsive signals. The correlative fluctuations within input and output signals are eliminated effectively by the analog simultaneous differencer. The difference and normal signals are alternately sampled and accumulated by the digitizer and the microcomputer, that is, the microcomputer 2-channels box-car integrator is realized. The difference and normal accumulated data are transferred to the personal computer, which calculates the ratio of the difference to normal accumulated data, i.e. the estimated attenuation in nepers. By the experiments of electrical and optical impulse transmissions, the minimum measurable attenuations become respectively 2.7×10(-4)NP and 6.0×10(-4)Np. Even the latter value is the smallest so far as the authors know. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanadaYoshihiro kn-aut-sei=Tanada kn-aut-mei=Yoshihiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SanoHiroya kn-aut-sei=Sano kn-aut-mei=Hiroya aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=95 end-page=126 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Transient Flow in Groundwater to Wells in Island Model Aquifer en-subtitle= kn-subtitle= en-abstract= kn-abstract=In order to apply the numerical method to practical groundwater flow problem in the field, the hydraulic properties must be estimated. In this paper, new methods of analyzing drawdown tests were developed and illustrated with some examples to determine hydraulic properties of aquifer. Drawdown tests sometimes have to be performed near the boundary of the aquifer or in the much groundwater supplied aquifer. In such instances, the assumption that the aquifer is of infinite areal extent is no longer valid. Therefore the analytical solutions of unsteady flow due to drawdown test are derived in the conception of "Island Model" that the shape of groundwater level is fixed by the circular water supply which is equilibrium with the pumping rate. By using these solutions, new methods of analyzing drawdown tests which are performed in a confined aquifer and an unconfined aquifer were given respectively and the effect of influence region was evaluated. The example analysis to determine permeability and storage coefficient were shown. As the results,the propriety of the solutions is verified comparing the analytical results with the drawdown test data taken from a real aquifer project. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishigakiMakoto kn-aut-sei=Nishigaki kn-aut-mei=Makoto aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonoIichiro kn-aut-sei=Kono kn-aut-mei=Iichiro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Depertment of Civil Engineering affil-num=2 en-affil= kn-affil=Depertment of Civil Engineering END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=33 end-page=51 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19800301 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=System Identification Using Fast Fourier Transform en-subtitle= kn-subtitle= en-abstract= kn-abstract=Algorithms for system identification applying throughout Fast Fourier Transform (FFT) to the major calculating operations are introduced. It is shown that by using data of about as twice length as system settling time and by truncating the incorrect correlation functions resulting from them, errors owing to finiteness of data can be avoided. It is shown that so as to suppress the effects owing to statistical fluctuation of input data or output noise, superposition of data in frequency domain is effective, and also the damping terms of poles or zeros can be efficiently evaluated by utilizing the phase change of the spectra of the impulse response sequence. The proposed method can be efficiently applied to relatively higher order systems or relatively rapidly time-variant systems because of high accuracy and high speed processing of FFT. Moreover, it needs not to assume the order of the system a priori, and yields a reasonable lower order approximating system in itself. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KanedaMasahiro kn-aut-sei=Kaneda kn-aut-mei=Masahiro aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=127 end-page=138 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Discharge Coeffi cient of a Sluice Gate Placed at Sudden Expansion of Open Channel en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper the discharge coefficient of a sluice gate placed at the sudden expansion of an open channel is investigated theoretically and experimentally. Lateral and vertical expansions are treated in the study. The coefficients obtained for channels with sudden expansion are compared with those for the straight channel. For free efflux, experimental results show that the coeffcients for expanded channels are always larger than those for a straiaht one,and that the coefficient for a channel to be fully expanded to both lateral and vertical directions takes about 1.2 times larger value than that for a straight one. For submerged efflux, the coefficient is obtained theoretically by using the efflux model shown in this study. The theoretical results explain the experimental ones fairly well. The coefficient for lateral expansion is always smaller than that for a straight channel. The minimum downstream water depth required to submerged efflux for the expanded channels becomes smaller than that for a straight channel. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NagoHiroshi kn-aut-sei=Nago kn-aut-mei=Hiroshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FurukawaSyuzo kn-aut-sei=Furukawa kn-aut-mei=Syuzo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Depertment of Civil Engineering affil-num=2 en-affil= kn-affil=Depertment of Civil Engineering END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=139 end-page=150 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Ozonation of Organic Substances from View Points of Wastewater Treatment en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, ozonation of organic substances which are found in wastewater is discussed regarding following respects; (1)removal ratios of COD(Cr) and TOC, (2)removal properties, and (3)oxidation products. The main results are summarized as follows. (l)Ozonation quickly removes proteins and amino acids, but mildly polysaccharides and n-saturated carboxylic acids. (2)The initial removal of COD(Cr) or TOC is quite rapid, but, as the reaction continues, it slows down so drasti-cally that one may suspect that it has completed. (3)Starch and albumine are decomposed to the smaller molecular compounds. (4)The COD(Cr) /TOC ratio of each substance which is chosen in this study decreases. This means that ozonation results in the formation of oxygenated fragments of the original molecule-occurs by bond fission or partial oxidation. (5)Proteins are indispensable components in frothing because they are surface active. They are removed by not only oxidation but also foaming, however, the removal by foaming is not so large. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KawaraOsami kn-aut-sei=Kawara kn-aut-mei=Osami aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Civil Engineering END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=53 end-page=72 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19800301 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Consideration on Physics of Saturated-UnsaturatedGroundwater Motion en-subtitle= kn-subtitle= en-abstract= kn-abstract=The purposes of this paper are primarily to research on behavior of groundwater flow in saturated and unsaturated zone, and to present the fundamentals of the theory of groundwater flow. This paper discusses the physics of the saturated-unsaturated groundwater motion. Evaluations confirm the early belief that Darcy's law is of the nature of statistical result giving the empirical equivalent of Navier-Stokes equations. The governing equation of saturated-unsaturated flow in porous media is derived from the law of mass conservation and from the Darcy's law and Richard's equation of motion and is compared with the Klute's diffusion equation which has been widely used in the analysis of unsaturated flow. As a result; it is concluded that the governing equation has the advantage that can be applied for the whole flow region. Typical boundary conditions are enumerated. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishigakiMakoto kn-aut-sei=Nishigaki kn-aut-mei=Makoto aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonoIichiro kn-aut-sei=Kono kn-aut-mei=Iichiro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Civil Engineering affil-num=2 en-affil= kn-affil=Department of Civil Engineering END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=73 end-page=110 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19800301 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Experimental Study on Determining Unsaturated Property of Soil en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with the experimental study of hydraulic properties of unsaturated soil. In treating unsaturated zone, a great deal more data are required than are required for the saturated zone, but these properties of soils must be known to apply the finite element approach to actual groundwater flow problems. The purposes of this paper are to propose a rational basis of getting experimental relationships between prossure head() and hydraulic conductivity(K) and between pressure head() and volumetric moisture content(θ) with "the instantaneous profile method" in a laboratory. An apparatus was constructed and test procedures were developed to measure pressure head and volumetric moisture content by using pressure transducers and low-energy gamma ray attenuation. The technique of a low-energy gamma radiation apparatus does provide a means for accurate measurement of water content without disturbing the system into which water is moving. Furthermore rapid measurement of water content becomes possible at any position in a soil so that water content changes with time may easily be followed. The tensiometer~transducer system provides a most valuable means of measuring pressure head with rapid response and with provision of a complete record of the pressure head changes with time. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonoIichiro kn-aut-sei=Kono kn-aut-mei=Iichiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishigakiMakoto kn-aut-sei=Nishigaki kn-aut-mei=Makoto aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Civil Engineering. affil-num=2 en-affil= kn-affil=Department of Civil Engineering. END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=111 end-page=118 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19800301 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Properties of the Amorphous Fe(100-x)B(x) Alloy Prepared by rf-Sputtering Technique en-subtitle= kn-subtitle= en-abstract= kn-abstract=The amorphous Fe(100-x)B(x) alloys with 18 ≤ x ≤ 42 were prepared by applying a rf-sputtering technique. The chemical composition of the sputtered films was well controlled by varying the area ratio of B plate to Fe plate, which were used as a composite target. The crystallization temperature of the amorphous films linearly rises with increasing of B content up to x = 36, but falls in a composition range of 36 ≤ x ≤ 42. The amorphous Fe(100-x)B(x) films exhibited ferromagnetism in the whole compositions studied in the present work. The internal magnetic field of the amorphous films decreases with increasing of B content, since the charge transfer increases with B atom in the system Fe(100-x)B(x). en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KanamaruFumikazu kn-aut-sei=Kanamaru kn-aut-mei=Fumikazu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OdaKiichi kn-aut-sei=Oda kn-aut-mei=Kiichi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MiyazakiSusumu kn-aut-sei=Miyazaki kn-aut-mei=Susumu aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YoshioTetsuo kn-aut-sei=Yoshio kn-aut-mei=Tetsuo aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiKatsuaki kn-aut-sei=Takahashi kn-aut-mei=Katsuaki aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Research Institute for Non-Crystalline Materials affil-num=2 en-affil= kn-affil=Research Institute for Non-Crystalline Materials affil-num=3 en-affil= kn-affil=Research Institute for Non-Crystalline Materials affil-num=4 en-affil= kn-affil=Research Institute for Non-Crystalline Materials affil-num=5 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=15 cd-vols= no-issue=1 article-no= start-page=1 end-page=16 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19801129 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Factors Affecting Plunge Grinding Force en-subtitle= kn-subtitle= en-abstract= kn-abstract=Grinding force has a close relation to grinding inputs such as grinding wheel, work material, interference condition, grinding speed, grinding fluid and machine condition, and therefore varies widely with grinding inputs. On the other hand, grinding force affects significantly grinding outputs which are efficiency and quality evaluated with surface roughness, accuracy, surface integrity and so on. It is important to make clear the relations between grinding inputs and grinding force in order to control grinding outputs. In this paper, from the above point of view, the relations between grinding inputs and grinding force are experimentally investigated. It is pointed out that the normal grinding force, the tangential grinding force and its ratio are determined by the product of speed ratio of work speed to wheel speed and setting depth of cut as for interference conditions, and by the product of square of dressing feed and cutting depth of. dresser as for dressing conditions. Furthermore as for characteristics of work materials, the normal grinding force has a close relation to the yield stress, and the force ratio is related to the elongation of work material. en-copyright= kn-copyright= en-aut-name=NakajimaToshikatsu en-aut-sei=Nakajima en-aut-mei=Toshikatsu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=UnoYoshiyuki en-aut-sei=Uno en-aut-mei=Yoshiyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=119 end-page=129 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19800301 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Semiautomated Determination of COD in Environmental Water Samples en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new method based on the principle of flow injection analysis is presented for the semiautomated determination of chemical oxygen demand (COD) in environmental water samples. The method is rapid and continuous, and suitable for the monitoring of COD in wastewaters. The apparatus used was simply constructed by parts commercially available for high performance liquid chromatography. Teflon tubing heated with a boiling water was used as a reactor and simultaneously used for mixing coils and transmission lines. The operating conditions were examined to apply the determination of COD in wastewaters by using glucose as a standard COD substance. The procedures recommended are as follows: Both 4.9x10(-4) M potassium permanganate and 6.7 % sulfuric acid solutions are individually pumped, 20 μl of a sample solution is injected into the flow of the sulfuric acid solution, and then mixed with a mixing joint. The mixed solution is transported to a flow cell situated in a spectrophotometer fixed at a wavelength of 525 nm, and decrements of absorbance are recorded. The peaks were reproducibly obtained at a concentration range of 10 - 200 mg-COD 1(-1). Chloride up to 1000 mg 1(-1) was not interfered at all. Various wastewater samples were analyzed by the proposed method at a sampling rate of 30 samples per hour, and the apparent COD values obtained were compared with the manual COD ones obtained by JIS method. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KorenagaTakashi kn-aut-sei=Korenaga kn-aut-mei=Takashi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IkatsuHisayoshi kn-aut-sei=Ikatsu kn-aut-mei=Hisayoshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MoriwakeToshio kn-aut-sei=Moriwake kn-aut-mei=Toshio aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiTeruo kn-aut-sei=Takahashi kn-aut-mei=Teruo aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Center for Environmental Conservation Technology, Okayama University. affil-num=2 en-affil= kn-affil=Center for Environmental Conservation Technology, Okayama University. affil-num=3 en-affil= kn-affil=Department of Synthetics Chemistry. affil-num=4 en-affil= kn-affil=Department of Industrial Chemistry. END start-ver=1.4 cd-journal=joma no-vol=15 cd-vols= no-issue=1 article-no= start-page=17 end-page=28 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19801129 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Influences of the Skin Impedance as the Interface in Bioelectric Potential Measurement en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the case of non-invasive measurement of bioelectric potential from body surface, the influence of the skin impedance has been investigated by using strict equivalent circuits of skin impedances. The relationship between the characteristic of skin impedance and the wave distortion was made clear. Furthermore, in the case of electrocardiograph, the shift potential of indifferent electrode to standard potential was obtained by means of simulation, and the distortions caused by connective resistances of a central terminal and skin impedance were quantitatively explained. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoYoshitake kn-aut-sei=Yamamoto kn-aut-mei=Yoshitake aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoTatsuma kn-aut-sei=Yamamoto kn-aut-mei=Tatsuma aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=15 cd-vols= no-issue=1 article-no= start-page=29 end-page=45 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19801129 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Hardware Design of Digital System with Remote-DiagnosticCapability en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, a hardware design of digital systems with remote-diagnostic capability is presented. We consider a method for testing a system T(l) on a module basis with a remotely installed systems T(2). In the testing mode, we set up a system (T(l)-m,m') such that a module m of T(l) is replaced by an adapter A(1) connected to other adapter A(2) through a telephone line and the corresponding module m' of T(2) is connected to A(2). If the system (T(l)-m,m') can simulate T(1) in the absence of any faluts, then it can test m' under a self test program. The main subject of this paper is to study the conditions of the system to be testable in the above sense. At first, the remote diagnostic network based on the system in this paper, restrictions to the system configuration required to perform such a diagnosis and the operation of the diagnostic system are described. The second, the module structure to make above simulation possible is considered, representing the system configuration graphically. Finally, an example of the adapter is shown and the time consumed to diagnose is discussed. One of our results is that a sufficiently large class of synchronous digital systems with few minor conventions is testable. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoTakuji kn-aut-sei=Okamoto kn-aut-mei=Takuji aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=1 end-page=12 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=X-ray Investigation on the Fatigue Damage of Metals Containing α- and β-Phases (On the Changes in Half-Value Breadth and ResidualStress of 6-4 Brass due to Stress Cycles) en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the field of mechanical engineering, the need for a simple but effective way of evaluating the fatigue strength and lifetime of structural materials is an important problem with which the design engineers have faced. Accordingly, a cunsiderable amount of investigations have been made in this field. However, the basic nature of fatigue damage and the conditions which lead to the initiation and propagation of fatigue cracks are not sufficiently understood. Nor any satisfactory method of assessing the exact state of fatigue damage has yet been found. X-ray diffraction technique is not a new as the method of experimental study, but has often been adopted for direct and non-destructive observations of change in the local structures of crystalline materials at fundamental research. X-ray technique is one of the most powerful means to investigate the changes of microscopic- structure due to external forces, considering the fatigue phenomena occur on the surface of materials. Accordingly, one of the authors have studied the relations of half-value breadth of X-ray diffraction lines, residual stresses and hardness and number of cycles of fatigue stresses in detail for various sorts of engineering metallic materials. In the results of a number of experiments, it has been found that the variation in half-value breadth showed very regular relation with number of stress cycles, the authors have reported that the lifetime of materials in fatigue could be predicted. Consequently, it needs to investigate whether or not this predicting method is fitted for alloy containg α and β phase, moreover, it is interesting to make clear the fatigue mechanism of such materials which are present two phases having the different yield stress and type of crystal structure. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HondaKazuo kn-aut-sei=Honda kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonagaTetsuro kn-aut-sei=Konaga kn-aut-mei=Tetsuro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering School of Engineering, Okayama University affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering School of Engineering, Okayama University END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=13 end-page=22 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=State of Efflux of Scavenging Air through the Scavenging Ports en-subtitle= kn-subtitle= en-abstract= kn-abstract=In order to make clear how the efflux angle changes in a small crankcase scavenged engine cylinder and in a large loop scavenged engine cylinder, the inlet flow pattern in the single cycle model cylinder has been observed by a high speed motion camera. In general, the scavenging air stream is not effluent in the designed direction of the scavenging port at comparatively slight opening, and the efflux angle changes in proportion to port opening advance. In a small crankcase scavenged engine cylinder, to keep the scavenging air stream in the direction of the scavenging port it is effective to incline the scavenging air passage between the crankcase and the cylinder, and to make thicker the cylinder wall where located scavenging port. In a large loop scavenged engine cylinder to coincide the scavenging air stream with the direction of the scavenging port in the early stage of the scavenging, it has an effect to set the guide plate the position of 1/2 at port height. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KashiwadaYukio kn-aut-sei=Kashiwada kn-aut-mei=Yukio aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AkiyamaKoichi kn-aut-sei=Akiyama kn-aut-mei=Koichi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering School of Engineering, Okayama University affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering School of Engineering, Okayama University END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=23 end-page=28 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Investigation of the Drawability of Sheet Metals (Measurements of r Values of Sheet Steel) en-subtitle= kn-subtitle= en-abstract= kn-abstract=For assessing the qualities of sheet metal for deep-drawing by the tension test, γ value is adopted generally. However, it is difficult and complicated to obtain the precise value of it. In order to obtain the value precisely and easily, the authors have made trialy the devices to measure directly the elongation and the reductions of width and thickness; these devices are transducers to which the electrical resistance strain gauges are applied. By using these devices, precise, continuous, multipoint and quick measurement can be done. It has been clarified by the continuous measurements that γ values are not the same relating to the elongations. It is recommended that one uses γ value obtained at about 25% elongation. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamadaToshiro kn-aut-sei=Yamada kn-aut-mei=Toshiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KitagawaShigeru kn-aut-sei=Kitagawa kn-aut-mei=Shigeru aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering School of Engineering, Okayama University affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering School of Engineering, Okayama University END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=29 end-page=36 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Mass Transfer by Rotating Jets Part I. C0(2) Gas Absorption by Cylindrical Liquid Jets en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this report, gas absorption by a rotating cylindrical liquid jet, whose water traveling length is short, is considered experimentally. Experiments of absorption are proceeded in pure C0(2) gas and water at 20℃: C0(2) gas is cross-currently contacted with a liquid jet. From experimental results, absorption rate was observed to be large immediately after liquid was spouted from small hole drilled through rotating cylinder. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiTeruo kn-aut-sei=Takahashi kn-aut-mei=Teruo aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=37 end-page=43 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Diffusion through the Interface between Viscous Liquids in a Laminar Flow (Diffusion in a Laminar Flow) en-subtitle= kn-subtitle= en-abstract= kn-abstract=Studies were carried out in order to know in some detail the transport phenomena through the interface in the viscous liquid moving in laminar flow. Experiments were carried out using ca. 88% glycerin solution, one added with an acid, and the other with alkali together with a small amount of phenolphthalein. Acidic glycerin solution was supplied to a long transparent cuvette of rectangular cross section through which the liquid was made to move slowly enough to establish the laminar flow, thin cords of coloured basic solution were introduced in the direction normal to the axis of flow at regular time intervals. The so obtained patterns of bending cords shortening in regular succession were photographed also at regular time intervals. The authors attribute the origin of the changing patterns of the cords to the velocity gradient existing in the acidic solution which accelerates the diffusion by increasing the concentration gradient near the cords as well as the increase of the interfacial area, and also the decrease of the thickness of the cords. Based on these idea a mathematical analysis was carried out and was obtained an equation which gives the change of the concentration distribution of two dimensional cords. Fair agreement was obtained between the results of mathematical analysis and those of experiments. Furthermore, the influence of the thickness of the cords, and that of the velocity gradient as well as of the diffusion coefficient on the concentration at the center of the cords were discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiKatsuaki kn-aut-sei=Takahashi kn-aut-mei=Katsuaki aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TaniokaMamoru kn-aut-sei=Tanioka kn-aut-mei=Mamoru aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YoshioTetsuo kn-aut-sei=Yoshio kn-aut-mei=Tetsuo aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=44 end-page=46 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Reaction of γ,γ-Dimethyl-α, β-dicarbethoxybutyrolactone with Acetyl Chloride en-subtitle= kn-subtitle= en-abstract= kn-abstract=Acetylation of γ,γ-dimethyl-α,β-dicarbethoxybutyrolactone in benzene in the presence of sodium hydride was attempted. The structure of the condensation product was assigned to O-acetyl derivative, which was converted into γ,γ-dimethyl-β-carbethoxy-α-carboxybutyrolactone whose structure is also discussed by IR spectrum. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ToriiSigeru kn-aut-sei=Torii kn-aut-mei=Sigeru aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=47 end-page=50 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Reaction of α-Chloro-N-arylisobutyrimidyl Chloride with Ethyl Malonate(1) en-subtitle= kn-subtitle= en-abstract= kn-abstract=a-Chloro-N-arylisobutyrimidyl chloride (I) reacted with ethyl sodiomalonate to afford N-aryl-2,2-dimethyl-3 carbethoxysuccinimide. This reaction seems to proceed in a different mechanism from that of the synthesis of tetronic acids(2) and is supposed to involve a primary attack of the carbanion at the a-carbon atom of the chloride followed by the cyclization. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaSatosi kn-aut-sei=Wada kn-aut-mei=Satosi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhmuraYutaka kn-aut-sei=Ohmura kn-aut-mei=Yutaka aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Kurasiki Rayon Co., Ltd END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=51 end-page=53 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Condensation of Ketones and t-Butyl Chloroacetate in the Presence of Magnesium. en-subtitle= kn-subtitle= en-abstract= kn-abstract=Condensation of σt -butyl chloroacetate and ketones by means of magnesium in ether or benzene alone was carried out but the excellent yields of P-hydroxy ester could not be obtained, and the results of the condensation of t -butyl bromoacetate and ketones by means of magnesium and mercuric chloride in benzene were also disappointing. When a mixture of benzene and ether was used as solvent in the condensation of t-butyl chloroacetate and ketone in the presence of magnesium and mercuric chloride, the yields of p-hydroxy esters from cyclohexanone and methyl isobutyl ketone were 62 and 71 % respectively, and were comparable with those of other condensing methods. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MoriwakeTosio kn-aut-sei=Moriwake kn-aut-mei=Tosio aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=54 end-page=58 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Synthesis of α, α-Dimethyl-β-ethylallenolic Acid and 6-Methylthio-α, α-dimethyl-β-ethyl-2-naphthalenepropionic Acid en-subtitle= kn-subtitle= en-abstract= kn-abstract=Condensation of 6-methoxy- and 6-methylthio-2-propionaphthone with t-butyl α-bromoisobutyrate gave the corresponding t-butyl β-hydroxy esters in yields of 80 and 84% respectively. The treatment of the β-hydroxy esters with iodine in the presence of red phosphorus in boiling acetic acid effected reductive cleavage to produce 6-hydroxy- and 6-methylthio-α, α-dimethyl-β-ethyl-2 naphthalenepropionic acid in yields of 33 and 34% respectively. Reduction of the former ester in the presence of palladium-charcoal in acetic acid gave α, α-dimethyl-β-ethyl-6-methoxy-2-naphthalenepropionic acid in a 49% yield. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MoriwakeTosio kn-aut-sei=Moriwake kn-aut-mei=Tosio aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=59 end-page=62 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Two Distinct Types of Spherulite in Poly (ethylene oxide) en-subtitle= kn-subtitle= en-abstract= kn-abstract=Fujiwara's oriented crystallization method was applied to poly (ethylene oxide) to obtain a uniform texture composed of parallel fibrils which correspond to the structure of a radial direction of spherulites. Two different x-ray diffraction patterns in crystallite orientation of the spherulite radius were obtained. From these patterns and crystallization conditions it could be determined that the spherulite radius has a [401] rotation axis below about 50℃ and two [421] and [421]rotation axes above about 50℃. A reasonable interpretation was given for these two ways of spherulitic crystallization, based on the growth features of lamellar crystals of poly (ethylene oxide). That is, it is concluded that a second order transition in poly (ethylene oxide) lamellar crystals near the temperature of 50℃ is responsible for the change of the rotation axis in spherulite radius. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamashistaYuhiko kn-aut-sei=Yamashista kn-aut-mei=Yuhiko aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YokoyamaFumiyoshi kn-aut-sei=Yokoyama kn-aut-mei=Fumiyoshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=63 end-page=69 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Approximate Solution of Nonlinear Oscillatory Circuits (I) en-subtitle= kn-subtitle= en-abstract= kn-abstract=The well-known steady state solution of nonlinear oscillatory circuits based on the use of Fourier series, the so-called harmonic balance, is a powerful method because of its wide applicability. Yet, this method has not only difficulties to solve transcendental equations or algebraic equations of higher orders, but gives no transient state solution. The harmonic approximation and the extended harmonic approximation defined in this report are linearization methods which give approximations of steady state and transient state simultaneously. Furthermore the method enables an unification and extension of miscellaneous linearization methods. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MineTadao kn-aut-sei=Mine kn-aut-mei=Tadao aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoTatuma kn-aut-sei=Yamamoto kn-aut-mei=Tatuma aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=BabaYukinobu kn-aut-sei=Baba kn-aut-mei=Yukinobu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=70 end-page=77 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Calculation of Circuit Constants for Impulse Voltage Generator by Means of Computer en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, we describe the way to compute circuit constants of the impulse voltage generator by means of the digital computer, when an impulse voltage waveform is given. The definition of waveform is to be revised, and this definition is adopted to our computation. From the results, we can see the influence of revising definition upon circuit constants. We also devised graphs, from which we can easily determine the L-C-R circuit constants. (see Fig.2(a)) en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MoriyasuTadataka kn-aut-sei=Moriyasu kn-aut-mei=Tadataka aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Mizushima Technical High School END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=78 end-page=83 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of a Half-Controlled Single-Phase Bridge Circuit with Free-Wheeling Diode (1) en-subtitle= kn-subtitle= en-abstract= kn-abstract=The operation, mainly in a steady state, of a half controlled single-phase bridge circuit with a finite inductive load, has been treated analytically. Some operation features of particular bridge circuits are discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FukumoriKooichi kn-aut-sei=Fukumori kn-aut-mei=Kooichi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Kurashiki Technical High School END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=84 end-page=90 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The RC Network Analyzer Using the High Permittivity Ceramics and its Applications en-subtitle= kn-subtitle= en-abstract= kn-abstract=Described in this paper are the design considerations of the simple element of the two-dimensional RC distributed constant circuit and its applications for the analysis of the transient heat conduction problems in engineering work. This element is formed by coating with the resistive film the upper surface of the high permittivity ceramics plate whose back side to be silvered. In addition to a resistivity of every elementary area within the resistive film, there exists capacitive coupling between the area and ground. This element can be regarded as a typical two-dimensional RC distributed system and utilized as a simulator for the same dimensional heat conduction system. It has a convenience and high accuracy for the analysis of the transient heat conduction problems in engineering work. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KatoOsamu kn-aut-sei=Kato kn-aut-mei=Osamu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering, Okayama University affil-num=2 en-affil= kn-affil=Department of Electrical Engineering, Okayama University END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=91 end-page=97 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Strategical Study of Some Management en-subtitle= kn-subtitle= en-abstract= kn-abstract=As has been told, industry is roughly composed of three elements: man, money and machine. Along with a macroscopically slow development in social democracy on each microscopically quantum stage, management and administration in almost enterprise they have been exceptionally concerned with one after another. From machine to man, from man to money and then from money to machine, cyclically the tentative subject has been transfered as though we are nondescending the spiral stair with ever divergent radii. (Fig.1) en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MatudaMotoi kn-aut-sei=Matuda kn-aut-mei=Motoi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Representative of Management Association in Okayama END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=98 end-page=105 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Simulator of Waiting Line Problems en-subtitle= kn-subtitle= en-abstract= kn-abstract=Demand and supply of service are complicatedly related with the balance between fixed capital and circulating capital, movement to the left or right side from a break-even point, and other factors. If there is the disproportion between demand and supply of service, the waiting line to take a service will vary, and in some cases, fixed equipment will not be employed effectively. This report presents trial manufacture of the experimental equipment for waiting line problems. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TomiyaNobuaki kn-aut-sei=Tomiya kn-aut-mei=Nobuaki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=106 end-page=109 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On Physical and Mental Fatigue en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this experiment the comparison was studied between the muscular and the nervous fatigue and the flicker phenomenal value of the optic nerve. In order to measure the physical fatigue, various methods have been reported by many authers. In this experiment, a quantification of the fatigue was tried though the relation between the amount of mental activity and the FF (flicker frequency), which is useful in physical fatigue measurement with the change in respiration and pulse. In measuring the FF, respiration and pulse caused by physical work, it shows that the these three measured values are somewhat exponential, which might be called the exponential accumlation of fatigue. In mental activity slight relation was also found between fatigue and learning. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HaranoHiromi kn-aut-sei=Harano kn-aut-mei=Hiromi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MiyazakiYoshiyuki kn-aut-sei=Miyazaki kn-aut-mei=Yoshiyuki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=110 end-page=115 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Optimizing Control of a Batch Reaction Process en-subtitle= kn-subtitle= en-abstract= kn-abstract=The batch chemical reaction is chosen as the process model to be optimized and the rate constants are functions of pressure only, as the reactions are assumed to occur isothermally. The time optimal control problem considered here means to determine the minimum time path from the given initial compositions to desired final compositions by manipulating the process pressure. A gradient method or a steepest-ascent method is applied to determine the control variable program by using the high speed digital computer. Numerical solutions are presented for the following three cases: (1) no constraint on the operating pressure ...... open and matched terminal constraint. (2) constraint on the operating pressure ...... open terminal constraint. (3) constant operating pressure ...... open terminal constraint. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakamatsuTakeiciro kn-aut-sei=Takamatsu kn-aut-mei=Takeiciro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SayamaHayatoshi kn-aut-sei=Sayama kn-aut-mei=Hayatoshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TonoikeTakao kn-aut-sei=Tonoike kn-aut-mei=Takao aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Faculty of Engineering, Kyoto University affil-num=2 en-affil= kn-affil=Dapartment of Industrial Science affil-num=3 en-affil= kn-affil=Central Research Institute, Chisso Co. END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=116 end-page=119 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Identification of Chemical Reaction Process en-subtitle= kn-subtitle= en-abstract= kn-abstract=The identification or model building of system is the important problem for the dynamic optimization of chemical plant and it is desired that this mathematical model can be determined as quickly and as exactly as possible from experimental or operating data. Recently the identification of linear system has been studied, but there have been few papers on nonlinear systems. Especially, no approaches can be found to identify effectively a chemical reaction process which is a nonlinear and nonisothermal system. Except for the case in which the linearized model is enough to represent the approximate dynamic behaviour of the plant, system should be directly represented by nonlinear mathematical model in general. In this paper, the gradient method was applied to identify a nonlinear system. In this method, the parameters to be chosen optimally are regarded as timeinvariant control variables and they are numerically determined by using a high speed digital computer (KDC-I). As a numerical example, we choose a continuous stirred tank reactor with the first order exothermic reaction and show the procedure to determine the three parameters, that is, the order of reaction, the values of activation energy and frequency factor. It should be emphasized that this approach makes it possible to construct the mathematical model of nonisothermal chemical reaction processes only from input and output data. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakamatsuTakeichiro kn-aut-sei=Takamatsu kn-aut-mei=Takeichiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SayamaHayatoshi kn-aut-sei=Sayama kn-aut-mei=Hayatoshi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Faculty of Engineering, Kyoto University affil-num=2 en-affil= kn-affil=Dapartment of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=120 end-page=129 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Pneumatic On-off Controller with Feedback Compensation en-subtitle= kn-subtitle= en-abstract= kn-abstract=We attempt to apply the feedback compensation technics of on-off controller to the pneumatic systems. In this paper, we describe the structure and the action of a new developed pneumatic on-off controller with feedback compensation, and the principle of the special pilot valve which is used in the controller as the on-off element. Next, it is shown analytically and experimentally that the dynamic characteristics of the controller are nearly equal to those of the continuous one which has an infinite proportional gain instead of the on-off element, if the time average of its discontinuous output is treated as the output of the controller. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SawaragiYosikazu kn-aut-sei=Sawaragi kn-aut-mei=Yosikazu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YonezawaYoo kn-aut-sei=Yonezawa kn-aut-mei=Yoo aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science, Okayama University affil-num=2 en-affil= kn-affil=Faculty of Engineering, Kyoto University affil-num=3 en-affil= kn-affil=Kyushu Institute of Technology END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=130 end-page=133 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Manual Control System en-subtitle= kn-subtitle= en-abstract= kn-abstract=The method of the harmonic analysis of the human operator's characteristics by means of an analog computer is described. The human operator's characteristics in the closed loop system are described by vector locus. The human operator controls in response to the sine wave input so as to make constant the gain in the closed loop system. In accordance with the change of the input frequency, the operator changes his control action. Consequently the transfer function of the human operator's characteristics is too complex and difficult to be described by a linear element. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhgishiShinji kn-aut-sei=Ohgishi kn-aut-mei=Shinji aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science, Okayama University affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=134 end-page=137 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Aging and Precipitation of Al-Ag and Al-Zn Alloys en-subtitle= kn-subtitle= en-abstract= kn-abstract=Polycrystalline specimens of Al-30wt % Ag and Al-30wt % Zn alloys, which were quenched into water from the temperature of solution heat treatment, were annealed at L.T. aging temperatures or reversion temperatures so as to make them contain zones of nearly equal radii for each alloy and various concentrations of solute element in zones. These specimens were cold rolled exactly to 50%, and then annealed at L. T. aging temperatures for varying time. The state of zones and precipitates were investigated by X-ray small-angle scattering photographs. The results obtained were as follows: (1) The precipitation ofγ'-phase began earlier in the specimens of Al-Ag alloy annealed at L. T. aging temperature before cold rolling than in those specimens annealed at reversion temperatures before cold rolling when annealed at L. T. aging temperatures after cold rolling. (2) The rate of precipitation of Zn solid solution in Al-Zn alloy did not depend upon the annealing temperature before cold rolling when cold rolled specimens were annealed at L. T. aging temperature. (3) In Al-Ag alloy, the rate of disappearance of G. P. zones at L. T. aging temperature depends mainly upon the annealing temperature before cold rolling. On the other hand, in Al-Zn alloy, the rate of disappearance of G. P. zones at L. T. aging temperature does not depened upon the annealing temperature before cold rolling. (4) These results may be explained without contradiction considering the relation of structures between matrix and precipitates and the deformation stacking faults. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhtaMutsuo kn-aut-sei=Ohta kn-aut-mei=Mutsuo aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=138 end-page=147 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Binding Energies between a Vacancy and a Cadmium, Indium or Tin Atom in Al-10wt % Zn, Al-3.0wt % Ag and Al-3.0wt % Cu Alloys en-subtitle= kn-subtitle= en-abstract= kn-abstract=The changes of electrical resistivity of several alloys, that is, Al-10wt % Zn, Al-10wt % Zn-0.01wt % Cd, Al-10wt % Zn-0.01wt % In, Al-10wt % Zn-0.01wt % Sn, Al-3.0wt % Ag, Al-3.0wt % Ag-0.01wt % Cd, Al-3.0wt % Ag-0.01wt % In, Al3.0wt % Ag-0.0lwt % Sn, Al-3.0wt % Cu, Al-3.0wt % Cu-0.0lwt % Cd and Al-3.0wt % Cu-0.01wt % In, during isothermal aging after quenching were measured. The interactions between a vacancy and a cadmium, indium or tin atom in Al-10wt % Zn, Al-3.0wt % Ag and Al-3.0wt % Cu alloys were estimated. Binding energies obtained for Al-Zn, Al-Ag and Al-Cu base ternary alloys agree within experimental accuracy with each other. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhtaMutsuo kn-aut-sei=Ohta kn-aut-mei=Mutsuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HashimotoFumio kn-aut-sei=Hashimoto kn-aut-mei=Fumio aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanimotoTadashi kn-aut-sei=Tanimoto kn-aut-mei=Tadashi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=1 end-page=4 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Pendulation of a Water Column in an Open Vertical U-Tube en-subtitle= kn-subtitle= en-abstract= kn-abstract=The friction coefficient for unsteady flow of fluids in pipes has not been studied so well. Usually the friction coefficient for steady flow has been used in place of one for unsteady flow. For a checkup of shis institution, in this paper, the pedulation of water column in an open vertical U-tabe is studied analytically and experimentally. The results of the numerical calculations coincide with the experimental results fairly well. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiroseKoji kn-aut-sei=Hirose kn-aut-mei=Koji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitaShiro kn-aut-sei=Fujita kn-aut-mei=Shiro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=5 end-page=11 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Study on Fundamental Characteristics of Oil Seal (Temperature Dependence of Characteristics) en-subtitle= kn-subtitle= en-abstract= kn-abstract=In order to clarify the sealing mechanism of an oil seal, it is necessary to know its fundamental properties and movement now in action. There are two subjects in this study. One is to reveal the temperature dependence of fundamental properties, mainly wringing force, average wringing pressure and lip contact width, and the other is to know the lip temperature now in action and to know how the lubrication is carried out at the lip portion. The measurements were carried out with our devised instruments for the former subject and with a thermocouple for the latter. A simple analysis of the lip temperature obtained was made in order to know a mechanism of the lubrication. The results indicate that with the rise of temperature of oil seal, the wringing force and the average wringing pressure decrease because of the reduction of rubber elastic modulus and of thermal expansion of spring, and the lip contact width hardly varies, and also indicate that under a constant temperature of lubricating oil, the lip temperature never rises so high as in the case of free rising of oil temperature, and that the fluid lubrication is carried out at the lip. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamadaToshiro kn-aut-sei=Yamada kn-aut-mei=Toshiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KaniKouki kn-aut-sei=Kani kn-aut-mei=Kouki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishijimaKunihiro kn-aut-sei=Nishijima kn-aut-mei=Kunihiro aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering affil-num=3 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=12 end-page=19 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On Conformal Mapping onto Circular-Radial Slit Covering Surfaces and its Extremal Properties en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MizumotoHisao kn-aut-sei=Mizumoto kn-aut-mei=Hisao aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=20 end-page=22 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Significance of the Learning Function in the DevelopingLogic of the Capital Welfare en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, we suggest the essentiality of the Learning Function in the total administration rather than the analytic management. Moreover, in order to manage the enterprise in wider and deeper markets, more excellent self-learning and high potentials become much indispensable for the trustworthy employers and employe. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MatsudaMotoi kn-aut-sei=Matsuda kn-aut-mei=Motoi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Representative of the Management Association in Okayama END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=23 end-page=25 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Note on the Optimal Assignment of Facilities to Locations by Branch and Bound en-subtitle= kn-subtitle= en-abstract= kn-abstract=The problem of the optimal assignment of facilities to locaticns has been solved by J.W. Gavett and Normann V.Plyter. In their paper the branch and bound technique is used and for this purpose the distance matrix is transformed into the matrix whose diagonal compoents are zero. The purpose of this paper is to avoid such a transformation and the store of the distance matrix into the computer. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YoshiiTensho kn-aut-sei=Yoshii kn-aut-mei=Tensho aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=26 end-page=29 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On an analysis of Bus driver's Flicker Values (1) en-subtitle= kn-subtitle= en-abstract= kn-abstract=There are a number of methods for measuring the fatigue because the measurement of this in the working hours is useful for analyzing the factors of fatigue and for the utilization of the labor management. In this paper, the fatigue of bus drivers who have experience of various number of years in some bus company is measured by the flicker and these values are analyzed by X(2) test or sign test and its control limit is determined. These are contributed to find a daily variation and to estimate the fatigue capacity, the degree of skill and what factors have influence on points which oversteps the limit line. It was found in this study that the limit line gets lower as the year of experience increases and the flicker values decrease in the forenoon. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MatsudaAkira kn-aut-sei=Matsuda kn-aut-mei=Akira aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Managing Director of Ryobi Bus Co. Ltd. END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=30 end-page=34 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Optimal Design of Chemical Process by Nonlinear Programming Technique en-subtitle= kn-subtitle= en-abstract= kn-abstract=The optimum temperature in a sequence of two stirred tanks is considered subject to inequality constraints. For an illustrative example this nonlinear programming problem is solved using the SUMT method of Fiacco and McCormick, which transforms the constrained problem into a sequence of unconstrained minimization problems. The results are presented for several cases, and are fairly good. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SayamaHayatoshi kn-aut-sei=Sayama kn-aut-mei=Hayatoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=Oiko kn-aut-sei=Oi kn-aut-mei=ko aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science, School of Engineering, Okayama University affil-num=2 en-affil= kn-affil=Department of Industrial Science, School of Engineering, Okayama University END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=35 end-page=38 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Study of the Manual Control System en-subtitle= kn-subtitle= en-abstract= kn-abstract=An analysis is attempted of the human operator's responses to the sinusoidal input and the random input. The human operator's characteristics in the closed loop system are represented by the Bode diagram. This diagram shows that the human operator's response to the random input containing only those frequency components lower than 4 rad/s is almost in accordance with his response to the siunsoidal input of the same frequency range. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhgishiShinji kn-aut-sei=Ohgishi kn-aut-mei=Shinji aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=39 end-page=42 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Binding Energies between a Vacancy and an Atom of Lead or Gold in Al-10wt % Zn Alloys en-subtitle= kn-subtitle= en-abstract= kn-abstract=Binding energies between a vacancy and an atom of lead or gold were measured with the same method as those previously reported. The solid solubility of lead or gold in aluminium is very small, and the small quantity of precipitates are found along grain boundaries in this experiment. Therefore, it was not possible to determine the value of binding energy, but the lower limit of binding energy was estimated. The values of lower limit for Pb-Vacancy and Au-Vacancy binding energy were 0.38 eV and 0.35 eV, respectively. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhtaMutsuo kn-aut-sei=Ohta kn-aut-mei=Mutsuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HashimotoFumio kn-aut-sei=Hashimoto kn-aut-mei=Fumio aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanimotoTadashi kn-aut-sei=Tanimoto kn-aut-mei=Tadashi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=43 end-page=49 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Correlation of Flooding Velocities in Countercurrent Gas-Liquid Contactor of Column Type en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this report, the analogies of the maximum allowable liquid and gas velocities in various countercurrent gas-liquid contactors of column type are considered analytically. That is, by plotting the flooding points of various columns in a gas-liquid separated coordinates, the similar curves have been obtained in each column. Because the difference of these curves is due to the shape of each column, the difference of each shape must be corrected and evaluated as a ahape factor. Then, by containing this factor in coordinate variables, various flooding points in each column may be correlated by a single curve. If this correlation curve is used, the flooding velocity can be estimated easily, and the maximum allowable liquid and gas velocities in these countercurrent contactors of column type can be compared. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiTeruo kn-aut-sei=Takahashi kn-aut-mei=Teruo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitaKozo kn-aut-sei=Fujita kn-aut-mei=Kozo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=50 end-page=54 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Liquid Holdup on Rotational-current Tray en-subtitle= kn-subtitle= en-abstract= kn-abstract=Recently various trays in which mass transfer operations are carried out have been developed, and the authors have designed one of the rotational-current tray which is designed to direct flow of ascending gas horizontally across the tray surface. In this report, as a fundamental study for mass transfer on this tray, flow mechanism and liquid holdup on the tray are considered experimentally. Experiments are carried out by water-air, methanol-water air and gricerinewater-air systems. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiTeruo kn-aut-sei=Takahashi kn-aut-mei=Teruo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AkagiYasuharu kn-aut-sei=Akagi kn-aut-mei=Yasuharu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=55 end-page=61 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Measurement of High Temperature Thermodynamic Propertiesof Several Binary Alkali Silicate Glasses en-subtitle= kn-subtitle= en-abstract= kn-abstract=The method for continuous measurement of the high temperature heat content, developed by W.Oelsen et al. and applied to the glasses by M.Tashiro, was examined and modified in some points. Relations between the temperature and heat contents referred to the standard temperature 25℃, were determined for the some glasses of R(2)O-SiO(2) system, and the specific heats as well as the entropies were calculated. Comparing the results, some views have been obtained relating to the effect of the species and content of alkali ions on the thermodynamic quantities of such glasses. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiKatsuaki kn-aut-sei=Takahashi kn-aut-mei=Katsuaki aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YoshioTetsuo kn-aut-sei=Yoshio kn-aut-mei=Tetsuo aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MiuraYoshinari kn-aut-sei=Miura kn-aut-mei=Yoshinari aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiraiTaketsugu kn-aut-sei=Hirai kn-aut-mei=Taketsugu aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry affil-num=4 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=62 end-page=67 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Measurements of Decomposition Voltage of Na(2)O-SiO(2) System at Elevated Temperature by Commutator Technique en-subtitle= kn-subtitle= en-abstract= kn-abstract=Decomposition voltages of Na(2)O (30-50 mole % )-SiO(2) binary system were estimated at the temperature range of 700~1200℃ by commutator technique. As the experimental procedure, relations between electrolytic current and resulting polarization potential without ohmic loss were observed by 20 cps mechanical commutator, using Pt|Na(2)O-SiO(2)|Pt electrochemical system. Experimental decomposition voltages determined from above relationship were the value of 1.5~2.0 V at the temperature beyond about 800℃ with comparatively less reproducibility. Further investigations on the decomposition reaction mechanisms were made in reference to both a series of reversible decomposition voltages derived from thermodynamic calculations on the several proposed decomposition reactions and chemical equilibrium in vitreous silicates. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiraiTaketsugu kn-aut-sei=Hirai kn-aut-mei=Taketsugu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MiuraYoshinari kn-aut-sei=Miura kn-aut-mei=Yoshinari aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YoshioTetsuo kn-aut-sei=Yoshio kn-aut-mei=Tetsuo aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiKatsuaki kn-aut-sei=Takahashi kn-aut-mei=Katsuaki aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry affil-num=4 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=68 end-page=73 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Lactone Carboxylic Acids. II. Synthesis of α-Benzylideneparaconic Acids en-subtitle= kn-subtitle= en-abstract= kn-abstract=The reaction of ethyl γ,γ-dialkylparaconate with aromatic aldehydes, i.e., benzaldehyde, anisaldehyde, p-chlorobenzaldehyde, and piperonal, has been investigated. The condensation took place at the α-position of the lactone ring. As the acidic components, α-benzylideneparaconic acids and α-benzylidene-β-alkylidensuccinic acids were obtained in 25-48% and 7-15% yields, respectively. From the neutral portions small amount of ethyl benzylideneparaconates were separated. During the course of distillation ethyl α-benzylideneparaconate was partially converted into α-benzylidene-γ-methy-γ-ethylbutyrolactone. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NagaeHiroyuki kn-aut-sei=Nagae kn-aut-mei=Hiroyuki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ToriiSigeru kn-aut-sei=Torii kn-aut-mei=Sigeru aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=74 end-page=79 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Lactone Carboxylic Acids. III. Reaction of Ethyl　β-Alkylglycidates with Ethyl Malonate en-subtitle= kn-subtitle= en-abstract= kn-abstract=The ring opening of epoxide group in the reaction of ethyl ,β-alkylglycidates with sodiomalonate was observed mostly at the α-position of the glycidates. Ethyl β-ethylglycidate, however, on treatment with sodiomalonate gave ten percent of β-fission product, elucidated by NMR spectra. The reaction sequence provides a general preparative route to γ-alkylparaconic acids and their derivatives. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KariyaYosihiro kn-aut-sei=Kariya kn-aut-mei=Yosihiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ToriiSigeru kn-aut-sei=Torii kn-aut-mei=Sigeru aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Synthetics Chemistry, School of Engineering, Okayama University affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=80 end-page=83 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Lactone Carboxylic Acids. IV. Reaction of Ethyl Chloroarylpyruvate with Ethyl Malonate en-subtitle= kn-subtitle= en-abstract= kn-abstract=The condensation of ethyl chloroarylpyruvate (Ⅰ) with ethyl malonate in the presence of sodium ethoxide afforded γ-aryl-α,β-dicarbethoxy-⊿(β),γ-butenolide. On the basis of the chemical and spectral evidences, the structure of the product (II) has been elucidated. This reaction provides new routes to α,β-dicarboalkoxy-γ-butyrolactones and/or to γ-ketocarboxylic acids. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaSatosi kn-aut-sei=Wada kn-aut-mei=Satosi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=UnoTakaaki kn-aut-sei=Uno kn-aut-mei=Takaaki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=84 end-page=87 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Giant Single Crystals of Poly (ethylene oxide) en-subtitle= kn-subtitle= en-abstract= kn-abstract=The preparative method of giant single crystals of PEO and the experimental results of them by x-ray diffraction and electron microscopy are described. The crystallization of PEO was carried out in a two dimensional crystallization apparatus. From the tridirectional x-ray diffraction patterns on the resulting platelike crystals, it was confirmed that these crystals have a single crystal-like orientation at high supercoolings, the [401] axis is parallel to a growing direction and the [001] axis is perpendicular to the wide surface, and a double orientation at low supercoolings, two axes of [421] and [421] are parallel to a growing direction and the [001] axis is perpendicular to the wide surface. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamashitaYuhiko kn-aut-sei=Yamashita kn-aut-mei=Yuhiko aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=88 end-page=92 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Study on single Crystals of Nylon 12 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Single crystals of two crystatalline forms, α and γ, in nylon 12 were obtained from dilute solutions. The single crystals of γ-form from diols solutions are ribbon like lamellae in shape, and that of α-form obtained from solution in water-formic acid are parallelogramic. Electron diffraction study shows that chain packings in single crystals of two crystalline forms are very similar to those of nylon 6, respectively en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraYasuo kn-aut-sei=Fujiwara kn-aut-mei=Yasuo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=93 end-page=95 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Condensation of Ketones and t-ButyI Haloacetates in the Presence of Aluminum or Lithium en-subtitle= kn-subtitle= en-abstract= kn-abstract=The Reformatsky reaction with t-butyl haloacetate could be effected in the presence of lithium or aluminum, but the latter metal proved to be disappointing as a condensing agent. Condensation of benzophenone with t-butyl chloroacetate and bromoacetate in the presence of lithium gave corresponding β-hydroxy esters in yields of 43 and 58%, respectively, and comparable with those of other condensing methods. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MoriwakeTosio kn-aut-sei=Moriwake kn-aut-mei=Tosio aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=96 end-page=110 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Approximate Solution of Nonlinear Oscillatory Circuits (II) en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the preceding paper a new method of analyzing nonlinear periodic oscillations was proposed. In this article a new conception, which is named as the extended harmonic approximation of nonlinear oscillatory circuits, is presented. Method of obtaining transient solutions by the conception is given and various numerical examples are shown. The new conception has merits that a consistent linearization method is given for both steady state and transient state domains and transient solutions are obtained simply. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MineTadao kn-aut-sei=Mine kn-aut-mei=Tadao aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoTatuma kn-aut-sei=Yamamoto kn-aut-mei=Tatuma aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=BabaYukinobu kn-aut-sei=Baba kn-aut-mei=Yukinobu aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoYositake kn-aut-sei=Yamamoto kn-aut-mei=Yositake aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=111 end-page=119 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Convenient Design-Method of Pressure Tank Used for Oil-Immersed Transformer en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, the easy design-method of trasformer tank is described. Using nomographs induced here, the bending moments on the oval tank or round cornered rectangular tank which is used for usual transformer, are briefly calculated. And the relation between the type of transformer and the distribution of bending moment is cleared. Using these results, even electric engineer who has poor knowledge for strength of materials, can easily design a most suitable tank. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=120 end-page=126 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of a HaIf-Controlled Single-Phase Bridge Circuit with Free-Wheeling Diode (II) en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper is presented on the operation of the phase controlled single-phase bridge circuit with a free-wheeling diode, which has capacitance in parallel with the inductive load. Such circuit configuration is frequently met with, for instance, at the time when the more smoothness of d-c voltage is required, the higher reliability of SCR's firing is taken into account or load windings include some capacitance which is not negligible. The capacitance influences not only largely upon SCR's rush current but also significantly upon control characteristics of the circuit such as wave forms, pulsating ratio and power factor etc. Here, the various effects of the capacitance on the circuit performance are discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=127 end-page=132 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Method of Automatic Washing for Salt Contaminated Insulators en-subtitle= kn-subtitle= en-abstract= kn-abstract=Described in this paper is a method of automatic washing for salt contaminated insulators. An average value of leakage current through the surface of the pilot insulator in a duration is measured, for this is a function of the quantity of salt adhered and its moisture content. In each cycle, the program signals give one by one the instructions on a start and an end of the integration of leakage current, a detection of the integrated value, a stop of the washing device and a reset of the integrator. The integrator consists of RC circuit and the main detecting part consists of the thyristor whose firing gate voltage is used as a reference value. If the integrator output rises above the firing gate voltage, the pulse signals are made in the signal conversion part at the same time that the thyristor turns on, which are distributed to the pump motor or the electromagnetic valve. Then the insulators on hot-line are washed all together in the appointed duration. Finally, by the various experiments this method was proved to have enough accuracy and reliability in practical use. The conclusions are summarized as follows. (1) An average value of leakage current is justified to be the detecting variable. (2) The RC circuit used as the integrator is proved to be easy in maintenance. (3) Because of the fairly short duration of the detecting action, the integrator is kept in a sufficiently safe condition under expected environment. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KatoOsamu kn-aut-sei=Kato kn-aut-mei=Osamu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoHideki kn-aut-sei=Yamamoto kn-aut-mei=Hideki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=133 end-page=137 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Considerations of Linkages between Analog and Digital for Function x(n) en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper describes a method of hybrid computation for the problems including the function x(n). And the greater part of it is devoted to the considerations of the linkages between the analog and the digital for the function x(n). Here the function x(n) appears frequently in the form of x(2) or x(4) in the industrial problems. As is well known the function x(2) is the characteristic included in fluid-flow problems, and x(4) is in heat-radiation problems. The weak points of analog computation for these characteristics are in accuracy and stability, but can be compensated by making use of digital computer for these parts. In the industrial uses the exclusive digital computer is more convenient than the general-purpose one. Here the relative error of analog computation, the linkages, the number of the digital elements and their relationships are considered at the same time and as the results the reasonable method of hybrid computation is obtained. That is, the exclusive digital multiplier with a compressor and an expandor is found reasonable. Its design considerations are described in details, but it is the basic idea among others that the characteristics of the compressor and the expandor are determined so that the relative error of the signal appearing at the output of the latter may be constant and as the results the necessary and sufficient number of the digital elements may be decreased. And in practice these characteristics are also realized approximately by a group of the straight lines through the origin. Finally the reduced rate of the digital elements and the optimum condition of the approximation are illustrated together with an example. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoTakuji kn-aut-sei=Okamoto kn-aut-mei=Takuji aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=1 end-page=11 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Mechanism of Fatigue Fracture (On the Distribution of Plastic Strain around Fatigue Cracks) en-subtitle= kn-subtitle= en-abstract= kn-abstract=Broadly speaking, there are three kinds of approaches to investigate the deformation and fracture of materials, that is, the microscopic (metallurgical), macroscopic(mechanical) and theoretical (mathematical) researches. It is necessary, however, to bridge the gap which persists among of them. Many investigations on the form of plastically deformed zone at a crack tip, the distribution of plastic strain in plastic zone and fracture criterion have been made for the purpose to clarify the mechanism on initiation and propagation of cracks. In this paper, the authors report the studies, from the standpoint of microscopic views, on the crystal deformation at the tip of crac's in notched specimen during fatigue process. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HondaKazuo kn-aut-sei=Honda kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonagaTetsuro kn-aut-sei=Konaga kn-aut-mei=Tetsuro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=13 end-page=16 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Friction Coefficient for Turbulent Flow ThroughSectionally Roughened Square Ducts en-subtitle= kn-subtitle= en-abstract= kn-abstract=The friction coefficient of sectionally rough pipes has not been studied yet. The friction coefficient for turbulent flow through sectionally roughened square ducts is experimentally studied. Four arrangements of rough surfaces are used to obtain the sectionally roughened square ducts. It is attempted to predict the friction coefficient for sectionally roughened square ducts from the friction coefficients for alloverly roughened and smooth square ducts. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiroseKoji kn-aut-sei=Hirose kn-aut-mei=Koji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AsanoYoshihiro kn-aut-sei=Asano kn-aut-mei=Yoshihiro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=17 end-page=22 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On a Relation between the Flicker Value and the Learning Process en-subtitle= kn-subtitle= en-abstract= kn-abstract=The measurement of the flicker value is a method to estimate the degree of the fatigue. This method is investigated by several authors. (1),(2) The control chart of the flicker value was used for one method of the labor management and found that this chart showed the learning trend. In this paper, the simulator of automobile was used to examine the relation between the variation of the flicker value and the driving environment, the learning process of the reaction and the relation between the flicker pattern and the learning process in the working hours. These were contributed to find the beginning of the stationary condition and which group was adapted to this work. Data was analyzed by statistical methods. It was found in this study that the variation of the flicker value and the learning process of the reaction were connected with each other. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusnmu kn-aut-sei=Kikuchi kn-aut-mei=Susnmu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=23 end-page=29 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Optimal Design of Extraction Processes by Gradient Methods en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with the optimization problem of extraction processes with recycle and immiscible solvent. Gradient methods using control variable iteration require a trial and error procedure to solve process and overall equations for this problem. A new formulation is presented to eliminate such a trial and error procedure. First order and second-order convergence gradient methods were applied to determine the optimum solvent distribution in cross-current extraction with recycle and immiscible solvent. The Fletcher-Powell method converged most rapidly in all cases. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SayamaHayatoshi kn-aut-sei=Sayama kn-aut-mei=Hayatoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OiKo kn-aut-sei=Oi kn-aut-mei=Ko aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=31 end-page=37 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Statical Characteristics of the Wall Reattachment Fluidic Devices en-subtitle= kn-subtitle= en-abstract= kn-abstract=This study is concerned with a developed method for obtaining the quantitative relations between the input or output characteristics and the geometric parameters of the wall reattachment fiuidic devices. In this report, it is shown analytically and experimentally that the characteristics can be represented by the functions, dependent on the geometric parameters only, with non dimensional quantities, if the Reynolds number at the main jet nozzle is sufficiently large. Accordingly, the quantitative relations of the geometric parameters may be analyzed more easily. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimizuAkira kn-aut-sei=Shimizu kn-aut-mei=Akira aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=39 end-page=50 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Binding Energy between a Vacancy and an Atom of Third Element and their Effects on the Initial Aging of Aluminium Binary Alloys en-subtitle= kn-subtitle= en-abstract= kn-abstract=Al-Zn, Al-Ag and Al-Cu base ternary alloys were studied by measurement of electrical resistivity. An approximate methods to estimate the binding energy between an atom of a third element and a vacancy was derived. The binding energy between a vacancy and an atom of Cu, Ag, Au, Be, Ca, Cd, In, Si, Ti, Ge, Zr, Sn, Pb or Mn was estimated to be <0.23, 0.25,> 0.35, 0.28, 0.27, 0.32, 0.39, 0.28, 0.30, 0.33, 0.33, 0.43, >0.38 or <0.23 (±0.05) eV, respectively. The results may be summarized as follows: (I) The ratio of the time required to reach the maximum electrical resistivity in isothermal aging curves of the Al-Zn-X or Al-Ag-X ternary alloy to that in the Al-Zn or Al-Ag binary alloy may be inversely proportional to the ratio of the concentration of vacancies bound to Zn or Ag atoms immediately after quenching in the ternary alloy to that in the binary alloy. And also the ratio of initial rate of clustering for AI-Cu-X ternary alloy to that in the binary alloy may be inversely proportional to the ratio of the concentration of vacancies bound to Cu atoms immediately after quenching in the ternary alloy to that in the binary alloy. It is possible to deduce the binding energy between an atom of X element and a vacancy using this relations. (2) The effect of the valence of the solute element on the binding energy between an atom of a third element and a vacancy was remarkable. (3) The effect of the radius of an atom of the solute element on the binding energy is also observed, but this effect is smaller than that of the valence. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhtaMatsuo kn-aut-sei=Ohta kn-aut-mei=Matsuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HashimotoFumio kn-aut-sei=Hashimoto kn-aut-mei=Fumio aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanimotoTadashi kn-aut-sei=Tanimoto kn-aut-mei=Tadashi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Department of Iudusttial Science END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=51 end-page=56 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Liquid-phase Mass Transfer Resistance in Rotational-current Tray en-subtitle= kn-subtitle= en-abstract= kn-abstract=The liquid phase mass transfer resistance in the Rotational-current tray is one of the most important factors in its design and performance. In this report, the holding time of liquid on the tray was studied experimentally by water-air system, and then the desorption tests were carried out by water-oxygen-air system that the liquid phase resistance were controlling. From the results of these experiments, it was found that the gas flow rate and the holding time of liquid on the tray control the tray efficiency strongly. Thus, the experimental equation for the number of transfer units based on liquid phase was derived. And also, it was found that this type of tray can be operated at high efficiency with a higher gas rate than the Kittel tray and the sieve tray without downcomer. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiTeruo kn-aut-sei=Takahashi kn-aut-mei=Teruo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AkagiYasuharu kn-aut-sei=Akagi kn-aut-mei=Yasuharu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Sanitary Engineering, Kyoto University END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=57 end-page=62 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Bubble Formation at Single Circular Hole en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this report the formation of bubbles at a single circular hole is considered theoretically, as a fundamental study on contacting devices for the purpose of mass transfer operation in chemical engineering. From many previous experimental data, it is found that the mechanism of bubble formation is classified into steady bubble growth system and potential bubble formation system. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiTeruo kn-aut-sei=Takahashi kn-aut-mei=Teruo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimizuKengo kn-aut-sei=Shimizu kn-aut-mei=Kengo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Chemisry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=63 end-page=68 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Spectrophotometric Studies on High Iron Content Silicate Glasses en-subtitle= kn-subtitle= en-abstract= kn-abstract=Spectrophotometric investigations were carried out on soda-lime-silica glasses containing iron in high content, corresponding to 4.9 wt.% Fe(2)O(3), and melted under the various reducing conditions, as a part of series of studies on the redox behavior of glass. Absorption measurement was made in the range from 340 mμ to 1000 mμ. Ferric ions could not be reduced to ferrous ions completely even by the amount of carbon of four equivalents. The ratio of the strength of light absorption at 1000 mμ as a typical band of Fe(2+) ions and that at 380mμ of Fe(3+) ions was expressed as E(1000)/E(380), which was examined for glass compositions as well as various carbon amount added to glass batches. The ratio decreases as the carbon amount increases and increases with decreasing content of Na(2)O or CaO. These changes of spectrophotometric properties of glasses were discussed from the view point of state of the the iron ions. Besides, some results on oxidized glasses were also added. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiKatsuaki kn-aut-sei=Takahashi kn-aut-mei=Katsuaki aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KambaraGinjiro kn-aut-sei=Kambara kn-aut-mei=Ginjiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkaharaMasamichi kn-aut-sei=Okahara kn-aut-mei=Masamichi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=69 end-page=72 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Biologically Active Compounds. I. The Synthesis of 5-Substituted 4-Methy1-3-carboxy-3(or 4)-alkenamides en-subtitle= kn-subtitle= en-abstract= kn-abstract=Monoamides of 5-substituted 4-methyl-3-carboxy-3(or 4)-alkenoic acids have been synthesized, starting with substituted itaconic anhydrides. The anhydride ring was opened by amines to afford N-aryl(or alkyl)-4-alkyl(or aryl)-3carboxy- 3(or 4}-alkenamides. The structure of the amide was elucidated by the comparison with the reference compound prepared from the corresponding Stobbe half-esters. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ToriiSigeru kn-aut-sei=Torii kn-aut-mei=Sigeru aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FunakosiHitosi kn-aut-sei=Funakosi kn-aut-mei=Hitosi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Synthetics Chemistry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=73 end-page=76 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Biologically Active Compounds. II. The Synthesis of　β-CarboxY-γ-butyrolactone Derivatives en-subtitle= kn-subtitle= en-abstract= kn-abstract=Amide derivatives of γ-substituted paraconic and aconic　acids have been　synthesized. Ultraviolet spectra of the aconic acid derivatives showed characteristic　fine structure in the region of 245 to 280 mμ. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ToriiSigeru kn-aut-sei=Torii kn-aut-mei=Sigeru aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IsikawaTatsuo kn-aut-sei=Isikawa kn-aut-mei=Tatsuo aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Synthetics Chemistry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=85 end-page=88 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Crystallization of Polymers from Solution under Shearing Stress II Polypropylene en-subtitle= kn-subtitle= en-abstract= kn-abstract=Isotactic polypropylene was crystallized in the form of fibrous crystals from solution under shearing stress. The fibrous crystals consist of the oriented cluster of micro fibrils. From the electron microscopy and the electron diffraction study, it was found that the fine texture of this fibrous crystals is also the two component systems which are composed of the central threads with an extended chain character and the lamellae with a folded chain character deposited on the threads, as in polyethylene. Relatively larger lamellar structure than that of polyethylene was observed. The effect of crystallization conditions to the formation of the fibrous crystals from solution of isotactic polypropylene was described briefly. A characteristic melting behavior due to the melting of the central threads with an extended chain character was observed from the thermogram of differential scanning calorimeter. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraYasuo kn-aut-sei=Fujiwara kn-aut-mei=Yasuo aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamashitaYuhiko kn-aut-sei=Yamashita kn-aut-mei=Yuhiko aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HironakaKiyoshi kn-aut-sei=Hironaka kn-aut-mei=Kiyoshi aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Industial Chemistry affil-num=2 en-affil= kn-affil=Department of Industial Chemistry affil-num=3 en-affil= kn-affil=Department of Industial Chemistry affil-num=4 en-affil= kn-affil=Department of Industial Chemistry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=89 end-page=94 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Crystallization of Polymers from Solution under ShearingStress III Polybutene-1 en-subtitle= kn-subtitle= en-abstract= kn-abstract=It was shown that the fibrous crystals of isotactic polybutene-l crystallized from solution under shearing stress are also composed of the central threads with an extended chain character and the epitaxally deposited lamellae with a folded chain character. The characteristic behaviors in this polymer exist in; (1) that the resulting crystals possess the hexagonal modification of form 1'; (2) that at low polymer concentrations the lamellar crystals with an orthorhombic modification of form Ⅲ are precipitated in similar fashion to the case in the absence of stirring; (3) that the morphology in surface replica of thick deposited film is very similar to that of melt extruded polyethylene film crystallized in a highly stressed state. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamashitaYuhiko kn-aut-sei=Yamashita kn-aut-mei=Yuhiko aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraYasuo kn-aut-sei=Fujiwara kn-aut-mei=Yasuo aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraMasahiko kn-aut-sei=Fujiwara kn-aut-mei=Masahiko aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry affil-num=4 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=95 end-page=100 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Optical Behavior of Polyethylene Spherulites en-subtitle= kn-subtitle= en-abstract= kn-abstract=Polyethylene was crytallized from the molten film under temperature gradient. As a result, the optically positive spherulites were observed, though only the negative spherulites had been observed previOusly in polyethylene. When the radial structure units twisted regulary in a spherulite are formed parallel to the surface of the film, the spberulite is usually optically negative in polyethylene. In this study, the temperature gradient normal to the surface of the film gives so significant tilt of the radial structure units formed to the surface of the film that the radial refractive index becomes larger than the tangential one under the transmitted polarized light and the spherulites have optically positive behavior. The optical behaviors of the polyethylene spherulites and the crystallizing condition were studied and discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SuefusaKiyoshi kn-aut-sei=Suefusa kn-aut-mei=Kiyoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Tsuyama Technical High School affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=101 end-page=105 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Potential Sweep Voltammetry of Na(2)O-SiO(2) Glass Melt by Stationary Platinum Electrodes en-subtitle= kn-subtitle= en-abstract= kn-abstract=Potential sweep voltammetries of Na(2)O·SiO(2) and Na(2)O·2SiO(2) at 730-1200°C were performed with the stationary platinum wire electrode and with the sweep rates of 40 and 120mV/sec. Although current-potential relation of Na(2)O . SiO(2) at 1200°C gave stationary S-shape pattern, those of the rest were transient modes with hysteresis. From the voltammetric considerations, a reversible oxygen electrode process where diffuion of free oxygen anion or silicate anion may be a rate-determining stage was tentatively proposed. Approximate estimations of decomposition voltage supported that a sole reaction process such as the decomposition of Na(2)O or indirect decomposition of SiO(2) in the melt was most probable. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiraiTaketsugu kn-aut-sei=Hirai kn-aut-mei=Taketsugu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiKatsuaki kn-aut-sei=Takahashi kn-aut-mei=Katsuaki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Synthetics Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry, School of Engineering, Okayama University END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=107 end-page=112 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Anodic Oxidation of trans-Cinnamic Acid. I. The Formation of Ketone and Aldehyde Derivatives en-subtitle= kn-subtitle= en-abstract= kn-abstract=The electrochemical oxidation of trans-cinnamic acid in a mixed aqueous solution of acetic acid and methanol containing potassium hydroxide was studied. The separation of ketones and aldehydes from the neutral materials using Girard reagent P gave benzaldehyde, tolualdehydes, acetophenone, methylacetophenones, propiophenone, phenacyl acetate, and phenacyl alcohol. The mechanism of the anodic reaction of trans-cinnamic acid has been discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ToriiSigeru kn-aut-sei=Torii kn-aut-mei=Sigeru aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkaHirotosi kn-aut-sei=Oka kn-aut-mei=Hirotosi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Synthetics Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=113 end-page=117 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Biologically Active Compounds. III. The Synthesis of α-Alkylamino-α-arylacetamides en-subtitle= kn-subtitle= en-abstract= kn-abstract=A series of α-monoalkylamino-α-arylacetamides and α-dialkylamino-α-arylacetamides have teen synthesized via the corresponding nitriles. Some of these compounds have been found to exhibit moderate activity as herbicides. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaSatosi kn-aut-sei=Wada kn-aut-mei=Satosi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Synthetics Chemistry affil-num=2 en-affil= kn-affil=Department of Synthetics Chemistry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=119 end-page=122 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=New Stable Sulfonium Ylides. 1-Dimethylsulfuranylidene-l-phenylsulfonyl-2-propanone and Related Compounds en-subtitle= kn-subtitle= en-abstract= kn-abstract=The preparation of the title compounds as a new type of stable S-ylides has been described. The reaction of 1-dimethylsulfuranylidene-1-phenylsulfonyl-2-propanone (IIb) with lithium aluminium hydride was found to result in the formation of trans-phenylpropenylsulfone (IV), phenylsulfonyl-2-propanone (Ib), and an unidentified paraffin as major products. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaSatosi kn-aut-sei=Wada kn-aut-mei=Satosi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=UnoTakaaki kn-aut-sei=Uno kn-aut-mei=Takaaki aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MasuikeTaketosi kn-aut-sei=Masuike kn-aut-mei=Taketosi aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ToriiSigeru kn-aut-sei=Torii kn-aut-mei=Sigeru aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department oj Synthetics Chemistry affil-num=2 en-affil= kn-affil=Department oj Synthetics Chemistry affil-num=3 en-affil= kn-affil=Department oj Synthetics Chemistry affil-num=4 en-affil= kn-affil=Department of Applied Chemistry, Fuculty of Engineering, Osaka City University affil-num=5 en-affil= kn-affil=Department of Industrial Chemistry, School of Engineering, Okayama University END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=123 end-page=126 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Studies on Oxasteroids. I. Synthesis of 3-Cyano-3-methylchroman-4-one. en-subtitle= kn-subtitle= en-abstract= kn-abstract=Condensation of chroman-4-one with ethyl formate in the presence of sodium methoxide gave 3-hydroxymethylenechroman-4-one (II). Reaction of II with hydroxylamine hydrochloride, followed isomerization by potassium t-butoxide gave IV. 3-Cyano-3-methylchroman-4-one was obtained by methylation of IV or treatment of III with potassium t-butoxide and methyl iodide. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MoriwakeTosio kn-aut-sei=Moriwake kn-aut-mei=Tosio aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HonjoYozo kn-aut-sei=Honjo kn-aut-mei=Yozo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Synthetics Chemistry and Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Synthetics Chemistry and Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=127 end-page=130 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Contactless Vectormeter Using Thyristors en-subtitle= kn-subtitle= en-abstract= kn-abstract=In order to measure the iron loss of the silicon steel plates, we produced a vectormeter using a thyristor and a gate turn off thyristor by way of experiment. This equipment is very useful, because the frequency range is improved very much in comparison with the vectormeter which is composed of the mechanical rectifying system using a synchronous motor, namely, is enlarged from 60Hz to 1kHz, en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Depertment of Electrical Engineering affil-num=2 en-affil= kn-affil=Depertment of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=131 end-page=136 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of the A-C Voltage Control Circuit with ParallelConnection of SCR and Reactor en-subtitle= kn-subtitle= en-abstract= kn-abstract=The a-c voltage control circuit, composed of parallel connection of a SCR and a reactor, gives the similar performance as the control circuit of a back to back SCR pair. However, the control characteristics of this circuit is affected by magnetizing characteristics of reactor. In this paper, the circuit with the resistive load has been analyzed by using the approximated models of hysteresis loop of core materials, where the SCR's forward voltage drop is taken into account. The results of the analysis have revealed the facts as follows, I) The control characteristics of the a-c voltage in average value is independent on the magnetizing characteristics of reactors except in the vicinity of minimum output point. But, in effective value, it is not valid. 2) A SCR's forward voltage drop results in the reduction of not only SCR's current but also reactor's current. 3) The a-c output current does not include the d-c component, if the winding resistance of the reactor is negligible. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WakabayashiJiro kn-aut-sei=Wakabayashi kn-aut-mei=Jiro aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=Engineering Research Institute Kyoto University END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=137 end-page=142 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Measured Dissipated-Energy in Switching-off by Electric Contacts en-subtitle= kn-subtitle= en-abstract= kn-abstract=The measurement of the dissipated energy in switching-off has been attempted to make clear the function of spark on electric contacts, which may unfortunately cause the combustible gas, such as propane gas etc, to catch fire and result in fire accidents. By utilizing the "Memoriscope" has been the meaurement carried out and the feature of this method is to provide the information on not only the amount of dissipated energy involved in one action but also on the trace of its instantaneous power which can affect catching fire delicately. Presented in this paper are the discussion of this measuring method and the measured results which are obtained experimentally in order to investigate the dependence of the energy dissipation on variety of contacts, contacts' deterioration and circuit arrangements. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KomatsubaraHitoshi kn-aut-sei=Komatsubara kn-aut-mei=Hitoshi aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KadowakiMasahiko kn-aut-sei=Kadowaki kn-aut-mei=Masahiko aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=Department of Electrical Engineering affil-num=5 en-affil= kn-affil=Identification Section, Oka)'ama Prefectural Police Hq END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=143 end-page=150 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Modified Type of the Resonant Turn-off SCR D-C Chopper en-subtitle= kn-subtitle= en-abstract= kn-abstract=A modified type of the resonant turn-off d-c chopprr using an auxiliary SCR, compared with its conventional one, has no limitation about its starting and also operates more steadily. Presented in this paper, making a comparison between the modified type and the conventional one, are the circuit analysis and its efficiency measurement from the point of view of overall efficiency, that is, the ratio of the output to the input. Furthermore, some effects of the source impedance, counter emf load, etc. are discussed. As a result, it has been analytically clarified that this modified type is different from the conventional circuit only by one terminal connection of turn-off capacitor, but has the features of uncompounded circuit configuration, no limitation about its starting and more steady operation. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FukumoriKooichi kn-aut-sei=Fukumori kn-aut-mei=Kooichi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=151 end-page=155 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of Waveform of the R-C Load-Current Controlled by the back to back SCR Pair en-subtitle= kn-subtitle= en-abstract= kn-abstract=The waveform of the load current has been analyzed theoretically on the single-phase series R-C circuit controlled by the back to back SCR pair. And then, the fluctuation of the barmonics calculated by the use of the electronic digital computer, has been discussed as for the firing angles of SCRs and the phase angle of load. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KondoTadao kn-aut-sei=Kondo kn-aut-mei=Tadao aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSenichiro kn-aut-sei=Nakanishi kn-aut-mei=Senichiro aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Tsuyama Technical College affil-num=4 en-affil= kn-affil=Tsuyama Technical College END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=157 end-page=162 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Method of Direct Analog Simulation Using Transistor Switches and its Applications en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the analog circuits for the systms governed by the dilfercntial equations with the coefficients which are a function of one or mOre of the dependent variables, the magnitudes of their circuit elements must be variable in accordance with the nature of the function. Such circuit elements can be realized by means of inserting or removing the additional elements with high speed switches in the analog circuits. Particularly, in the case of varying stepwise this method is effective. But as an analog circuit is regarded as a short-time or repetitive type analyzer, the above switches must be instantaneous operation. In this paper, first, it is made sure by the experiments that some of the transistor switches arc met this condition, and moreover arc very low closed resistance, very high open resistance and neglegible small voltage offsets. Next, the basic technique for the direct analog simulation usiug transistor switches is described about the simple example, i.e. the oscillatory system with varying cross-scctional surge tank. Finally, as its applications, the transient problems of these oscillatory systems arc solved by means of these analog circuits. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoTakuji kn-aut-sei=Okamoto kn-aut-mei=Takuji aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KatoOsamu kn-aut-sei=Kato kn-aut-mei=Osamu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=77 end-page=83 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Crystallization of Polymers from Solution under Shearing Stress I Polyethylene en-subtitle= kn-subtitle= en-abstract= kn-abstract=We tried to clarify the crystallization mechanism of long chain polymers in solution under shearing stress using polyethylene. From the bright and dark field electron microscope observations and the electron diffraction study, we demonstrated that the resulting fibrous crystals consist of the central threads with an extended chain character and the lamellae with a folded chain character nucleated on the threads. The measurements of thermal and mechanical properties gave the additional confirmation for this suggestion. From these results we discussed the crystallization mechanism on the fibrous crystals. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamashitaYuhiko kn-aut-sei=Yamashita kn-aut-mei=Yuhiko aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraYasuo kn-aut-sei=Fujiwara kn-aut-mei=Yasuo aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraYoshitaka kn-aut-sei=Fujiwara kn-aut-mei=Yoshitaka aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry affil-num=4 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=1 end-page=6 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Yield Strength and Stacking Fault Energy on Fatigue Crack Propagation en-subtitle= kn-subtitle= en-abstract= kn-abstract=It is very important to clarify the question whether fatigue crack propagation will be affected by mechanical propaties or other propaties of materials. In the present paper the authors studied in relation of yield strength and stacking fault energy to rate of fatigue crack propagation. αbrass were chosen for the investigation because they provided sufficient range in both quantities of interest that either could be varied independently of the other. Fatigue tests were carried out under full bending moment of flat specimens with V-shape notch. Chosen stress levels were 0.6 σy and 0.8 σy in which σy is yield strength, rate of fatigue crack propagation was evaluated from the second stage of the curve of fatigue crack propagation. The dependence of the rate on stacking fault energy γ was found to be dl/ dN=G・γ(n). But dl/dN did not systematically to change in yield strength. Thus, γ is concluded to be the controlling variable. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HondaKazuo kn-aut-sei=Honda kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonagaTetsuro kn-aut-sei=Konaga kn-aut-mei=Tetsuro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department oj Mechanical Engineering affil-num=2 en-affil= kn-affil=Department oj Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=1 end-page=8 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Development of X-Ray Stress Measurement TechniqueUsing X-Ray Diffraction by Crystal Oscillation Method. I, en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the present paper, to provide information on the stress measurement in coarse grained materials by X-ray micro-beam diffraction technique using a crystal oscillation method, the authors first examined experimentaly and theoretically the relation between the sizes of X-ray beam and crystal to obtain the particular diffraction ring in the case of use of crystal oscillation method. The specimen attachment of X-ray camera used in this experiment can be oscillated automatically around a horizontal and vertical axes with high accuracy centering around an illuminated position on the specimen surface. Accordingly it is possible to increase the number of the diffraction spots without changing the area and position of the specimen illuminated. Experiments were carried out for three kinds of annealed low careon steel with grain sizes of about 15, 30 and 50μ in diameter, and with X-ray beam collimated by pinhole slits of 0.12, 0.30 and 1.00 mm in diameter, using CrKα characteristic X-rays. On the other hand, a theoretical analysis was carried out according to the X-ray diffraction theory which have been proposed by P. B. Hirsch et al. As the conclusion, it is found that the crystal oscillation method is extremely useful for X-ray stress measurement of coarse grained materials. Moreover, the conditions of the crystal oscillating operation were clarified theoretically for any pair of the sizes of X-ray beam and crystal. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HondaKazuo kn-aut-sei=Honda kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonagaTetsuro kn-aut-sei=Konaga kn-aut-mei=Tetsuro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=9 end-page=12 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Friction Factors of Unsteady Pipe Flows en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this study, the friction factors of unsteady pipe flows have been experimentally investigated. The normal temperature water was used as working fluid and pulsating flow superposed on the steady turblent flow, having the variation of velocity approximately represented by sine curve, was used. In the result, the time mean friction factors of the unsteady flow agree with that of steady flow, and the momentary friction factors in the accelerating state are smaller and in the decelerating state larger than that in steady flow for each Reynolds numbers. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiroseKoji kn-aut-sei=Hirose kn-aut-mei=Koji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkaTakuma kn-aut-sei=Oka kn-aut-mei=Takuma aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=13 end-page=17 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Friction Coefficient for Turbulent Flow ThroughSectionally Roughened Square Ducts (Continued) en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this study, friction coefficients for sectionally roughened square ducts were measured for transional and turbulent flow. The velocity fields in the cross section were mesured for turbulent flow, and the predicting equation in the previous report was corected. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiroseKoji kn-aut-sei=Hirose kn-aut-mei=Koji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AsanoYoshihiro kn-aut-sei=Asano kn-aut-mei=Yoshihiro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Tsuyama Technical Junior College END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=7 end-page=12 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Friction Factor for the Turbulent Flow of Dilute Aqueous Polymer Solutions en-subtitle= kn-subtitle= en-abstract= kn-abstract=A series of turbulent pipe flow experiments with dilute aqueous C.M.C. solutions are described. The purpose of these experiments are to compare the anomalous viscous drag results from these experiments with the results using water (Newtonian viscous fluid). The additive concentrations of the present experiments are from 0.01% to 0.5% by weight of C.M.C., giving power-law indexes 1 to 0.75, respectively. All of the concentrations are found to give a reduction in turbulent friction factor, compared with Newtonian at the same Reynolds number. A maximum friction factor reduction of 64 % is obtained at a Reynolds number 2x10(3) for solutions having polymer concentration of 0.3% by weight. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiroseKoji kn-aut-sei=Hirose kn-aut-mei=Koji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkaTakuma kn-aut-sei=Oka kn-aut-mei=Takuma aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department oj Mechanical Engineering affil-num=2 en-affil= kn-affil=Department oj Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=19 end-page=30 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On Conformal Mapping onto Circular-Radial Slit CoveringSurfaces of Annular and Circular Types en-subtitle= kn-subtitle= en-abstract= kn-abstract=In paper 7) we concerned ourselves with the conformal mapping onto circular-radial slit covering surfaces over the whole plane and its extremal property. In the present paper we shall concern ourselves with the conformal mapping onto circular-radial slit covering surfaces of annular and circular types and their extremal properties (Theorems 1.1 and 2.1). Especially the extremal property with respect to the radial slits is new. The results are stated only for the case of the planar domain of finite connectivity. The method suggests the possibility of an extension to the case of a domain of infinite connectivity or an open Riemann surface of finite genus. We shall concern ourselves with this problem in the subsequent paper. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MizumotoHisao kn-aut-sei=Mizumoto kn-aut-mei=Hisao aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=13 end-page=19 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Trial Production of the Equipment Measuring ManySubjects' Critical Flicker Fusion Frequency at the Same Time en-subtitle= kn-subtitle= en-abstract= kn-abstract=The equipment measuring the critical flicker fusion frequency (CFF) is made in order to measure many subjects' CFF at the same time. This equipment is defined the multi-flicker. The equipment measuring CFF, used until now is defined the mono-flicker. It is analysed what factors influence CFF strongly. Then it is made clear that CFF value measured by the multi-f1icker can be used to show the brain weariness as well as that of the mono-flicker, and the vigual angle and the intensity of illumination in the room influence CFF value strongly. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=31 end-page=34 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On a Relation between the Flicker value and the Working Condition en-subtitle= kn-subtitle= en-abstract= kn-abstract=The appropriate disposition of the worker improves the ability of the worker and the efficiency of the labor and further decreases the rate of inferior goods and the rate of accidents. In previous paper, the variation of the flicker value, the trend of the miss frequency and the relation between them under the condition which has one surveillance point and one back-ground condition are analyzed. In this paper, the surveillance point is increased to two points and the back ground condition also two in order to examine which condition influences strongly to the flicker value in the working time. It was found that the variation of the flicker value is strongly connected with the qualification, the number of the surveillance and its miss-frequency. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=21 end-page=25 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effects of Pointed Splitter Position on Attached Jet Switching en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this report, the effects of splitter position on the attached jet were experimentally investigated for the purpose of discussing the applicability of a usual mathematical model without splitter. As results, the followings were confirmed, (l) For the splitter distance shorter than the critical distance, the pressure in the bubble lowers and the jet radius of curvature shortens. (2) At the ratio L(s)/D=4~5, the switching control flow rate becomes maximum. And bordering this value, the effects of splitter position on the switching are quite conversely. For the splitter distance longer than the above value, the switching control flow rate decreases, as increasing the distance. (3) For the splitter distance of 1.5~2 times critical distance, the switching is almost never affected by the splitter. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimizuAkira kn-aut-sei=Shimizu kn-aut-mei=Akira aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=35 end-page=38 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On a Relation between the Flicker Value and the Vibration en-subtitle= kn-subtitle= en-abstract= kn-abstract=Insuring fast and precise human operation is one of the engineering requirements in the developing civilization. Some man-machine system, when any operator is exposed himself to some kind of vibration, he may not perform his operation in good conditions. Then one of the interferring factors, there is a fatigue caused by vibration. In this study, subjects sit on the chair which was set on the vibration table, and were shaken vertically for some given times, then were measured whether the fatigue occured or not by flicker friction tester. Flicker patterns were analyzed according to each vibration-condition, then the authors knew that the fatigue was occured by vibration. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KanedaYasuhiro kn-aut-sei=Kaneda kn-aut-mei=Yasuhiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Depertment of Industrial Science affil-num=2 en-affil= kn-affil=Depertment of Industrial Science affil-num=3 en-affil= kn-affil=Depertment of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=27 end-page=31 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Deformation and Prefered Orientation of Precipitates in Cold Worked Al-Zn Alloys en-subtitle= kn-subtitle= en-abstract= kn-abstract=Fiber textures of drawn wires of Al-Zn alloys containing precipitates were studied mainly by X-ray methods. In supersaturated solid solution the wire texture was a double fiber texture with [100]and [111]. It was considered that a phase precipitates were rotated with matrix, while they were deformed. And then the matrix containing stable precipitates (Zn) had [100] and [111] textures. The intense spots, corresponding to [111] fiber texture of matrix, in the Debye rings of (002)p and (101)p planes of precipitates were clearly observed. But, on the other hand, spots, corresponding to [100] fiber texture of matrix, shown the prefered orientation of precipitates in (002)p Debye ring were very weak and brodening. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhtaMutsuo kn-aut-sei=Ohta kn-aut-mei=Mutsuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HashimotoFumio kn-aut-sei=Hashimoto kn-aut-mei=Fumio aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MaedaHironobu kn-aut-sei=Maeda kn-aut-mei=Hironobu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Electronics affil-num=3 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=47 end-page=52 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Solubility of Sulphur in a Cadmium Borate Glass and SomeProperties of the Sulphur Containing Glasses en-subtitle= kn-subtitle= en-abstract= kn-abstract=The glass forming limit by substitution of CdS for CdO in a CdO-B(2)0(3) glass was determined by chemical analysis. When x CdS-(60-x)CdO-40B(2)0(3) nominal mixtures in weight ratio were heated at 1100°C in flowing nitrogen gas for 1/2 hour, about 40~50% of mixed CdS and 10-15% of the mixed CdS were evaporated. The limit of nominal composition for glass forming was 10CdS-50CdO-40B(2)0(3) and the corresponding virtual composition after the above heat treatment was found to be 4.9CdS-46.4CdO-48.7B(2)O(3). Further addition of CdS made the melt devitrefied with CdS precipitation. D.C. conductivity measurements revealed that the current density was not linear with respect to the applied voltage, but the resistivity ranged around 10(12)Ω･cm for 4.1CdS-48.8CdO-47.1B(2)O(3) (virtual composition) glass and around 10(11.5)Ω·cm for 4.9CdS-46.4CdO-48.7B(2)O(3) glass. These sulphur containing glasses did not show photoconduction, although CdS-precipitated materials showed slight photoconductivity when disposed in ultra violet radiation. Apparent dielectric constant and tan 8 were also measured as a function of frequency, revealing a moderate dispersion in the CdS-precipitated glasses. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiKatsuaki kn-aut-sei=Takahashi kn-aut-mei=Katsuaki aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=GotoYasumasa kn-aut-sei=Goto kn-aut-mei=Yasumasa aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=53 end-page=56 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Polymorphism of Amylose V Complexes en-subtitle= kn-subtitle= en-abstract= kn-abstract=Lamellar crystals of amylose V complexes with the 6(1), 7(1) and 8(1) helical configurations can be prepared from aqueous solutions of amylose by using various complexing agents. It is noted that the crystal shape can be explained by the symmetry of the unit cell in the basal plane and the chain packing in the unit cell is cOncerned with the symmetry of helical chains. The existence of 6(1), 7(1) and 8(1) heliccs which occurs stepwisc with the number of glucopyranose an intger is discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamashitaYuhiko kn-aut-sei=Yamashita kn-aut-mei=Yuhiko aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=57 end-page=60 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Thermal Study on Adducts of Urea with n-Alkanes and n-l-Alkanols en-subtitle= kn-subtitle= en-abstract= kn-abstract=Crystalline adducts of urea with n-alkanes (C(8)~C(20)) and n-l-alkanols (C(12)~C(18)) were prepared. From thermal analysis and X-ray diffraction study on the adducts, we found that the composition of adducts and the heat of decomposition can be obtained easily from the thermogram of adducts. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MonobeKazuo kn-aut-sei=Monobe kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MurakamiYushi kn-aut-sei=Murakami kn-aut-mei=Yushi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YokoyamaFumiyoshi kn-aut-sei=Yokoyama kn-aut-mei=Fumiyoshi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=61 end-page=65 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis and Design of Parallel Inverter Circuit with Parallel Inductive Load en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, the parallel inverter circuit with the load consisted of resistive load and constant reactive load in parallel, is analyzed taking into acourlt the d-c source reactance. The circuit has a good voltage regulation for the variation of resistive load current, except the vicinity of no load. The design method in using the results of analysis is also discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakesi kn-aut-sei=Fujitsuka kn-aut-mei=Takesi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WakabayashiJiro kn-aut-sei=Wakabayashi kn-aut-mei=Jiro aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Engineering Research Institute, Kyoto University END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=67 end-page=82 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis on Magnetic Characteristics of Three-Phase Core-Type Transformers (Part I: Fundamental Equations and Linear Solutions) en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, we report the procedure to analyse magnetic circuits and give the linear solutions on magnetic characteristics of the three-phase core-type transformer which is composed of the complicated magnetic paths. First, we explain the construction of cores investigated and normalize the sizes of a core. To analyse these magnetic circuits, we introduced the electrical eqcuivalent circuits and obtained the general fundamental equations for each core. Then, we drew the linear-numerical solutions using an electronic computer, and cleared the relationships between the sizes of a core and the amplitudes and phase angles of fluxes in magnetic paths. Related with the above facts, we investigate the influence of these sizes on the core loss using cores of various quality. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=1 article-no= start-page=1 end-page=9 dt-received= dt-revised= dt-accepted= dt-pub-year=1972 dt-pub=19720710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On a Study of the Empirical Formula to Explain the Work Amount en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with the empirical formula to explain the work amount curve of a worker during a work. The empirical formula yt = at(b) + c was used to explain this phenomenon until now. This formula has been used mainly to approximate to the monotonous trend of the work amount curve. But it was made clear that if the work amount curve showed the polynomial trend, it could not be done so. Then the authors attempt to establish the empirical formula yt = a/{exp(Σb(i)t(i))-l} + c, which was the general form of the logistic curve in order to explain not only the monotonous trend but also the polynomial trend of the work amount curve. And it was made clear from the results of the approximation that this formula was the one of the most usuful formula in order to explain the work amount curve. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=1 article-no= start-page=25 end-page=29 dt-received= dt-revised= dt-accepted= dt-pub-year=1972 dt-pub=19720601 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Response of Electromagnetic Deflection for CRT Display en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the CRT display system of high-speed electromagnetic deflection, the tendency to amplifier saturation should not be neglected. We first show the limitation to the linear characteristics of input-output response and the response time under the saturation condition in this system. We try to improve the frequency-characteristics of the amplifier by making the load resistance constant and the feedback-paths partially positive, and reduce the L/R value of the load circuit by adopting the mutually-coupled yokecoils and the low-current amplifier. As the result, it is suggested that a low-power dissipation and highspeed response electromagnetic deflection system can be constructed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SanoHiroya kn-aut-sei=Sano kn-aut-mei=Hiroya aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanadaYoshihiro kn-aut-sei=Tanada kn-aut-mei=Yoshihiro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronic Engineering affil-num=2 en-affil= kn-affil=Department of Electronic Engineering END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=1 article-no= start-page=31 end-page=42 dt-received= dt-revised= dt-accepted= dt-pub-year=1972 dt-pub=19720710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Magnetoacoustic Amplification by Conduction Electrons en-subtitle= kn-subtitle= en-abstract= kn-abstract=A theory, based on Chambers' method to the classical Boltzmann equation, is developed for an acoustic amplification in both degenerate and nondegenerate piezoelectric semiconductors subjected to the Hall geometrically configured electric and magnetic fields. It is found that an amplification constant for qR>1 holds not only for a magnetic field ω(c)τ>1 but for ω(c)τ<1 under ql>1 while the amplification constant for qR<1 does for ql≦1 under　ω(c)τ>1; q is the wave number vector of sound, R the cyclotron radius, ω(c) the cyclotron frequency, 1 the mean free path and τ the relaxation time. A generalized attenuation (amplification) constant is presented through an energy conservation law, being applicable to the sounds propagating at any angle with respect to the particle drift so the off-axis as well as on-axis amplifications are surely involved. An application of the present theory to n-InSb reveals a threshold dependence for the acoustic amplification, which is semi-quantitative agreement with the experimental result of Arizumi et al.. The amplification constant by that nondegenerate particles is found to be almost equal to that by the degenerate ones, provided that the former carrier density should be replaced by its three times as much. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiiTadao kn-aut-sei=Ishii kn-aut-mei=Tadao aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics, Electrophyslcs END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=1 article-no= start-page=43 end-page=48 dt-received= dt-revised= dt-accepted= dt-pub-year=1972 dt-pub=19720710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Consideration on Sub-Optimal Weighting in Parameter Estimation en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with a parameter estimation method which yields the more suitable estimate of the parameter using noisy data or measured values. The estimation method is one that uses a kind of a weighted mean, and weighting at taking a weighted mean is interested in particularly. That is to say, as the grade of 'more suitable' depends upon the weighting, we can obtain the more suitable estimate by choosing the weighting coefficients suitablly. When the function which yields the estimate using finite measured values, i.e., the estimator is a particular form, sub-optimal weighting in the practical sense is discussed. Here, the concept of 'optimal' implies that the variance of the final estimate is minimum. And the particular form is one that both the denominator and the numerator of the estimator are first order formulas or second order formulas of finite measured values. And two theorems in relation to this problem are proposed and proved. Moreover, for an exsample of application of these theorems, a parameter estimation method is dealt with, which estimates the parameters of the pulse transfer function of a control system using the sampled measured values of the impulse response of that system. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KanedaMasahiro kn-aut-sei=Kaneda kn-aut-mei=Masahiro aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=2 article-no= start-page=49 end-page=60 dt-received= dt-revised= dt-accepted= dt-pub-year=1972 dt-pub=19721013 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Study of Anisotropic Workhardening en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with the stress-strain curves of single crystal and polycrystal considering the workhardening and the anisotropy which is due to the difference of workhardening on each slip system. The results obtained are summarized as follows: 1) The equations of workhardening on each slip system are derived according to the dislocation theory. 2) And it is found that the stress-strain curves of Cu single crystal and polycrystal calculated by using the workhardening equation with proper coefficients agree well with the experimental values. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HosokawaNorio kn-aut-sei=Hosokawa kn-aut-mei=Norio aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KoderaYoichi kn-aut-sei=Kodera kn-aut-mei=Yoichi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Graduate School of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=2 article-no= start-page=85 end-page=88 dt-received= dt-revised= dt-accepted= dt-pub-year=1972 dt-pub=19721013 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A New Representation of Distorted Wave Forms en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new method for representing distorted wave forms is investigated. The method suggested by us is a modified vector symbolic method. It has been hitherto thought that the vector symbolic method cannot be applied to the distorted waves, because the rotating speeds of each harmonic vector are not identical. Representing the argument of the n-th harmonic vector by l/n times as large as the phase angle of the harmonic component, the relative positions of respective harmonic vectors are invariable wherever the standard vector is put, and the wave shape can be deduced from the vector diagram. We found various correspondences between the wave forms and the vector diagrams. Therefore, the wave shape can be estimated from the vector diagram, and the mutual relationships between two wave forms can also be known. In electric or magnetic circuits, the causes of distorted wave forms are in general obvious. Therefore, there are very often the fixed relationships between the amplitudes and phase angles of the harmonics. Further, in polyphase a.c. circuits, there are often the fixed relationships between corresponding harmonics in the wave forms of the respective phases. When the wave forms of those circuits are discussed, the new method investigated in this paper may offer a useful key. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=2 article-no= start-page=89 end-page=100 dt-received= dt-revised= dt-accepted= dt-pub-year=1972 dt-pub=19721013 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis on Magnetic Characteristics of Three-Phase Core-Type Transformers [Part II: Non-Linear Solutions and Experimental Results for R3-Type Core] en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with the magnetic characteristics (the flux distributions, core losses, etc.) of threephase core-type transformers with double-layer. In the preceding report, only linear solutions have been given. In this paper, also non-linear solutions are discussed. Therefore, the flux waves of each magnetic path are distorted and contain various harmonics. When core losses are calculated, the hysteresis losses of minor loops are taken account. The results of analysis are compared with those of experiments. It is concluded that the principal cause for increasing core losses of this type core is the eddy current loss produced by harmonic fluxes. The flux distributions and the core losses depend on the shapes of the magnetization curve and the core-loss curve, that is, on the quality of the materials. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MorimotoHideki kn-aut-sei=Morimoto kn-aut-mei=Hideki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=8 cd-vols= no-issue=1 article-no= start-page=1 end-page=14 dt-received= dt-revised= dt-accepted= dt-pub-year=1973 dt-pub=19730720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Experimental Studies of Various Factors Affecting Minor Loop Hysteresis Loss en-subtitle= kn-subtitle= en-abstract= kn-abstract=When the distorted flux is induced in a magnetic circuit, the minor loops arise sometimes inside the major hysteresis loop. The area, accordingly the hysteresis loss of the minor loop,is affected by its amplitude and position, by the maximum flux density, by the quality of material, etc.. In this paper, we describe the experimental studies of the factors on the minor loop hysteresis loss. A method of getting the displacement factor of a minor loop which is placed at arbitrary position and has any amplitude is developed from our experimental results. Using this method, the core losses caused by the distorted flux can be calcuLated within the error less than three percent, even if the amplitude of the minor loop becomes near to the amplitude of the major loop. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanoMasanori kn-aut-sei=Nakano kn-aut-mei=Masanori aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=8 cd-vols= no-issue=1 article-no= start-page=15 end-page=24 dt-received= dt-revised= dt-accepted= dt-pub-year=1973 dt-pub=19730720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Allocation Technique Using Relative Distance and Relative Volume Estimated by Statistical Procedure en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with the allocation technique of the layout whose solution it takes as a little computation time as possible to obtain and which becomes as near to the optimal method as possible. In this method, the relative transport distance of each location and the relative transport volume of each department are calculated from the distance matrix and the volume matriX by the statistical procedures. And allocating departments to locations is determined by one to one correspondence between the arranged relative transport distances and the arranged relative transport volumes. This method was called the allocation technique by the statistical procedure ( ATSP in short ). This method doesn't use the heuristic algorithm. Therefore the calculation time can be reduced much in comparison with any other methods. As the algorithm of ATSP method is very simple, the sub-optimal layout can be determined easily by using the desk-calculator in cases of any layout problems. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraYutaka kn-aut-sei=Fujiwara kn-aut-mei=Yutaka aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Production Engineering, Matsue Technical Collage. affil-num=2 en-affil= kn-affil=Department of Industrial Science, School of Engineering Okayama University affil-num=3 en-affil= kn-affil=Department of Industrial Science, School of Engineering Okayama University END start-ver=1.4 cd-journal=joma no-vol=8 cd-vols= no-issue=1 article-no= start-page=25 end-page=40 dt-received= dt-revised= dt-accepted= dt-pub-year=1973 dt-pub=19730720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effects of Wall Length and Vent on Attaching Jet and Its Switching en-subtitle= kn-subtitle= en-abstract= kn-abstract=The effects of some geometries peculiar to the wallattachment fluidic devices on the attaching jet flow and the switching mechanism were experimentally made clear. And the propriety of the analytical mOdel, which has been used for the theoretical study of these devices, was investigated. The results can be summarized as follows: 1) The existing analytical model of the attaching jet flow is not applicable to the case of relatively short wall length of vent distance. 2) The attaching jet flow never detaches from a sufficiently long side wall with vent. 3) The switching mechanism of the vent type device is always the opposite wall switching. 4) From the viewpoint of the output characteristics of the device, the vent distance has a lower limit in relation to the vent width. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimizuAkira kn-aut-sei=Shimizu kn-aut-mei=Akira aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakagiMinoru kn-aut-sei=Takagi kn-aut-mei=Minoru aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=8 cd-vols= no-issue=1 article-no= start-page=41 end-page=43 dt-received= dt-revised= dt-accepted= dt-pub-year=1973 dt-pub=19730720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Effect of Temperature Gradient on Ultrasonic Attenuation en-subtitle= kn-subtitle= en-abstract= kn-abstract=The effect of temperature gradient on ultrasonic attenuation is estimated based upon the simple phenomenological theory, and it being found that the attenuation coefficient for a CdS crystal is 0.76 dB/cm at temperature gradient 100 K/cm. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiiTadao kn-aut-sei=Ishii kn-aut-mei=Tadao aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics, Electrophysics END start-ver=1.4 cd-journal=joma no-vol=8 cd-vols= no-issue=2 article-no= start-page=44 end-page=51 dt-received= dt-revised= dt-accepted= dt-pub-year=1973 dt-pub=19731226 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Friction Factors of Oscillating Pipe Flows en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this study, the friction factors of oscillating pipe flows are experimentally investigated. As the oscillating pipe flow, the pendulation of water column in the special vertical U-tube, which has about the 2 m long horizontal straight foot pipe, is utilized. The results of experiments show that the momentary friction factors in the accelerating state are smaller and in the decelerating state are larger than that in steady state for each Reynolds numbers. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiroseKoji kn-aut-sei=Hirose kn-aut-mei=Koji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NobunakaMasayuki kn-aut-sei=Nobunaka kn-aut-mei=Masayuki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=MITSUI Ship Building & Engineering Co., LTD., TAMANO Works END start-ver=1.4 cd-journal=joma no-vol=8 cd-vols= no-issue=2 article-no= start-page=52 end-page=65 dt-received= dt-revised= dt-accepted= dt-pub-year=1973 dt-pub=19731226 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Dynamic Behaviour of Attaching Jet en-subtitle= kn-subtitle= en-abstract= kn-abstract=The dynamic behaviour of attaching jet with single side wall to step control flow and the switching proces of the bistable amplifiers were investigated experimentally and theoretically. In the experiments, a large scale model was used with water. The flow patterns were visualized by the tracer of polystrene granules and were recorded by a cinecamera. In the analysis, the quasi-steady proces was assumed. The results obtained can be summarized as follows: 1) The proposed analytical dynamic model of attaching jet explains well the dynamic behaviour of attaching jet with single side wall. 2) The process" of the opposite wall switching may be divided into three phases. 3) The analytical model of the opposite wall switching, including the formulation of the switching criterion, was proposed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimizuAkira kn-aut-sei=Shimizu kn-aut-mei=Akira aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=DohtaShujiro kn-aut-sei=Dohta kn-aut-mei=Shujiro aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Graduate Student, Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=8 cd-vols= no-issue=2 article-no= start-page=66 end-page=74 dt-received= dt-revised= dt-accepted= dt-pub-year=1973 dt-pub=19731226 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Phase Adjusting of a Magic T-Coupled Oscillators System en-subtitle= kn-subtitle= en-abstract= kn-abstract=A magic T-coupled two oscillators system having arbitrary amount of phase adjusting errors is studied both theoretically and experimentally. Denoting two independent phase parameters of the system measured from their optimum values as Δφ and Δψ, it is derived analytically that the optimum operation is possible in principle in a definite region of Δφ - Δψ plane, so we have a considerable amount of margin for phase adjusting error. Experimental result also confirms the existence of some phase error margin, though the measured magnitude of margin is smaller to some extent than the theoretical prediction. en-copyright= kn-copyright= en-aut-name=FukuiKiyoshi en-aut-sei=Fukui en-aut-mei=Kiyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NogiShigeji en-aut-sei=Nogi en-aut-mei=Shigeji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=1 article-no= start-page=1 end-page=9 dt-received= dt-revised= dt-accepted= dt-pub-year=1974 dt-pub=19740720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Study Dust Abatement by Combustion en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with the abatement of the dust, which is produced from combustion of wood which is used in the process in the manufacture of "Bizen Yaki", by means of combustion. The experimental furnace disposal for after combustion, is added to "Nobori Gama". The measurements are done at both states without and with the furnace disposal. The results of the experiments show that process exhaust gases containing combustible dust can be destroyed effectively by the furnace disposal and the obtained dust abatement efficiency is about 80%. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HiroseKoji kn-aut-sei=Hirose kn-aut-mei=Koji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraTadao kn-aut-sei=Fujiwara kn-aut-mei=Tadao aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=1 article-no= start-page=11 end-page=21 dt-received= dt-revised= dt-accepted= dt-pub-year=1974 dt-pub=19740720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Grouth of G.P. zones in Al-Zn alloy en-subtitle= kn-subtitle= en-abstract= kn-abstract=Metastable values of electrical resistivity, P(E)' obtained during isothermal ageing differs in each experimental run even when the conditions of quenching and ageing were carefully kept constant. This phenomenon is considered to result from the competitive growth of G.P.zones. The range of the values of P(E) under the same conditions of heat treatments were examined, and the results obtained are as follows: (1) Metastable values of resistivity, P(E), during ageing at 70℃ after quenching from 300℃ were in rather narrow range. On the other hand, the width of the range obtained during ageing at 50℃ was wide. (2) When the specimens were aged at first at 70℃ until the maximum values of resistivity, P(M), being reached and then aged at 50℃ for long time, the metastable values of resistivity, PE*, were obtained. And the width of discrepancy of values of P(E)* was nearly equal to that of P(E) which was obtained in the case of isothermal ageing at 70℃ after quenching from 300℃. (3) It may be concluded that the width of discrepancy of values of P(E)* becomes smaller since the width of discrepancy of the number of G.P.zones for all experiments which can grow through competitive growth is made small by 70℃ ageing than that immediately after quenching from 300℃. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhtaMutsuo kn-aut-sei=Ohta kn-aut-mei=Mutsuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NagaiMakoto kn-aut-sei=Nagai kn-aut-mei=Makoto aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Graduate School of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=1 article-no= start-page=23 end-page=33 dt-received= dt-revised= dt-accepted= dt-pub-year=1974 dt-pub=19740720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Field Analysis of SF(6) Gas Insulated Cables and Its Application to Spacer Design en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper describes the spacer design for SF(6) gas insulated cables. The maximum electric stress within the cable is calculated by a numerical method, and it is recognized that the breakdown voltage depends linearly on the calculated values. Moreover, the effects of varying the shape of the spacer are made clear in this study for designing an optimum spacer. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoHideki kn-aut-sei=Yamamoto kn-aut-mei=Hideki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ItakaKoshi kn-aut-sei=Itaka kn-aut-mei=Koshi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Sumitorno Electric Industries, Ltd. END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=2 article-no= start-page=35 end-page=45 dt-received= dt-revised= dt-accepted= dt-pub-year=1974 dt-pub=19741225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Reduction of Engine Exhaust Noise by Throttling in an Exhaust Manifold en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper covers the work done in an attempt to reduce exhaust noise level without the decay of brake mean effective pressure of a two-cylinder two-stroke cycle engine, by means of an exhaust manifold having a throttle plate in its junction. The data are shown for various dimensions and configurations of the manifold and the discussion is given on the effect of exhaust throttling on exhaust noise level and engine performance. The principal results obtained by this study are as follows: (1) The lower limit of the throttle area was about onethird of a cross-sectional area of the manifold from the view point of brake mean effective pressure. (2) Within this limit brake mean effective pressure was scarcely influenced by throttling under the condition where a number of pressure oscillation related to the pulsation effect during an interval between discharges was less than 1.7. (3) A reduction in exhaust noise level attained was 8 dB(A) at higher engine speeds. (4) The junction angle of the manifold gave little significance to exhaust noise level and brake mean effective pressure. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishiwakiKazuie kn-aut-sei=Nishiwaki kn-aut-mei=Kazuie aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimamotoYuzuru kn-aut-sei=Shimamoto kn-aut-mei=Yuzuru aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=2 article-no= start-page=47 end-page=51 dt-received= dt-revised= dt-accepted= dt-pub-year=1974 dt-pub=19741225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Mass Spectral Fragmentations. I. Mass Spectral Date on the Synthetic Intermediates Related to the Preparation of Linaloyl Oxide en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper describes mass spectral data from synthetic intermediates of linaloyl oxide. The fragmentation of sulfur functional groups including compounds l-8 would provide fruitful evidences for structural assignment of acyclic and alicyclic monoterpenoid precursors. Since, 1,3-dithianyl group in l,2, and 3 can provide a base peak and the elimination of the sulfinyl group from 7 and 8 is considered to occur at the initial stage of the fragmentation. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ToriiSigeru kn-aut-sei=Torii kn-aut-mei=Sigeru aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=UneyamaKenji kn-aut-sei=Uneyama kn-aut-mei=Kenji aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaMasakazu kn-aut-sei=Ishihara kn-aut-mei=Masakazu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=2 article-no= start-page=53 end-page=61 dt-received= dt-revised= dt-accepted= dt-pub-year=1974 dt-pub=19741225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Mass Fragmentations. II. Some Aspects of Mass Spectra from a Series of Compounds Related to Methyl dl-Jasmonate Syntheses en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with graphical mass spectral data of the twentyfive compounds related to the preparation of methyl dl-jasmonate and its related materials. The fragmentations from the substituted cyclopentanones and norbornane derivatives can serve basic data for both characterization and elucidation of the structures of complex compounds referring to the preparation of principal components of jasmine flower. en-copyright= kn-copyright= en-aut-name=ToriiSigeru en-aut-sei=Torii en-aut-mei=Sigeru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TanakaHideo en-aut-sei=Tanaka en-aut-mei=Hideo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=MandaiTadakatsu en-aut-sei=Mandai en-aut-mei=Tadakatsu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry affil-num=3 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=2 article-no= start-page=89 end-page=105 dt-received= dt-revised= dt-accepted= dt-pub-year=1974 dt-pub=19741225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Computer Program of Forward Selection and Backward Elimination Procedure in Multiple Regression Analysis en-subtitle= kn-subtitle= en-abstract= kn-abstract=Multiple regression analysis are often used to explain the relation between the dependent variable and the independent variables. In case of that it arises necessity that the important independent variables which are closely correlated with the dependent variable are selected from among all given ones. There are some selection procedures. But these procedures can't be used usefully without using computer. Therefore two selection procedures that is Forward selection procedure and Backward elimination procedure in multiple regression analysis are programmed by Fortran Ⅳ. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=2 article-no= start-page=107 end-page=118 dt-received= dt-revised= dt-accepted= dt-pub-year=1974 dt-pub=19741225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Dynamic Design of a Tunnel Diode Transistor Combined Circuit en-subtitle= kn-subtitle= en-abstract= kn-abstract=The dynamic design of a tunnel-diode-transistor combined circuit and the applied pulse circuits are discussed. The combined circuit, in which a tunnel diode is connected in parallel with the collector junction of a transistor, is used. The dynamic design procedure is considerably simplified by describing the transient behavior of a tunnel diode with a set of approximate expressions and by the help of a selfanalog simulator. This circuit is capable of carrying out both memory and majority logic operations, and serves as a basic unit for several different pulse circuits, such as a mcnostable circuit, a frequency divider, a ring counter, etc. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoTakuji kn-aut-sei=Okamoto kn-aut-mei=Takuji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=51 end-page=56 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Gas-phase Mass Transfer Resistance in Rotational-current Tray en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this report, the average holding time of gas in foaming layer and the number of transfer units based on gas-phase of the Rotational-current tray were considered experimentally. The average holding time was determined by water-air system. On the other hand, the number of transfer units was determined by water-ammonia-air system that gas-phase resistance controlled. The average holding time increases with gas and liquid velocities, and does not change with the tray dimensions clearly. From the experimental results of the number of transfer units, it was found that the tray can be operated at high efficiency up to larger gas and liquid flow rates than that of sieve trays. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiTeruo kn-aut-sei=Takahashi kn-aut-mei=Teruo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AkagiYasuharu kn-aut-sei=Akagi kn-aut-mei=Yasuharu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Applied Chemistry, Okayama College of Science END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=57 end-page=64 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effect of Nozzle Length on Breakup Length of Liquid Jet en-subtitle= kn-subtitle= en-abstract= kn-abstract=Although the stability of Newtonian liquid jet has been investigated experimentally and theoretically, many problems has remained unsolved. Especially, the stability of liquid jets in immiscible liquid systems has been little studied. Furthermore, one has to point out that the stability of jets may be influenced by the turbulence in the nozzle and the velocity profile. This work presents the experimental result about the effect of the nozzle length on the breakup length of liquid jets in the air and in the immiscible liquid, as the beginning of a systematic investigation of the influence by these factors on the breakup of jet. The dependence of the initial amplitude of surface disturbances on the nozzle geometry is presented for evaluating the effect of the nozzle length on the breakup length of laminar liquid jet in the air and in the immiscible liquid. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiTeruo kn-aut-sei=Takahashi kn-aut-mei=Teruo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KitamuraYoshiro kn-aut-sei=Kitamura kn-aut-mei=Yoshiro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=1 article-no= start-page=1 end-page=16 dt-received= dt-revised= dt-accepted= dt-pub-year=1975 dt-pub=19750701 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Undeformed Chip Shape in Angular Grinding en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper describes the basic boundary conditions in angular grinding, which is widely applied as a high efficiency machining and where a complicated-shaped workpiece is ground at the same time. The angular grinding is first classified into three basic types, an external, a surface and an internal angular grinding, depending on the axis angle between the wheel and the work axes. The undeformed chip shape, which is characterized by the interference angle, the maximum chip thicknes and the chip length, is then analyzed in each type of angular grinding. The effects of grinding conditions such as the axis angle, the speed ratio, the radius ratio and the successive cutting edge spacing upon the geometry of undeformed chip are discussed to make clear the relations between the basic boundary conditions and the working conditions in angular grinding. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakajimaToshikatsu kn-aut-sei=Nakajima kn-aut-mei=Toshikatsu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakagawaHeisaburo kn-aut-sei=Nakagawa kn-aut-mei=Heisaburo aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=65 end-page=73 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Speed Control of a Three Phase Squirrel Cage Induction Motor Controlled by a Variable Frequency Three Phase Thyristor Inverter en-subtitle= kn-subtitle= en-abstract= kn-abstract=As one of the wide application of thyristor circuits, the inverter has a promising future and has been investigated vigorously. On the speed control of a squirrel cage induction motor by using a variable frequency thyristor inverter, although few papers have been presented, there seems to be many problems to be solved imminently. In this paper, the stability of performance of a thyristor inverter on this theme has been confirmed and some particular points with relation to practical use also have been discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=1 article-no= start-page=17 end-page=37 dt-received= dt-revised= dt-accepted= dt-pub-year=1975 dt-pub=19750701 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Computer Program of Forward Selection and Backward Elimination Procedure in Linear Discriminant Analysis and Test forDifferences Between Mean Values of Two Populations en-subtitle= kn-subtitle= en-abstract= kn-abstract=In multivariate analysis, the linear discriminant analysis and the test for differences between mean values of two populations are of wide application. It is not essential to increase the variables only in order to increase the degree of accuracy of discrimination or test without evaluating the effect of variables. Therefore the computer program of selection procedures of variables in these two methods is mentioned in this paper. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=1 end-page=6 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Further Considerations Concerning a Mechanism of Fatigue Crack Propagation en-subtitle= kn-subtitle= en-abstract= kn-abstract=X-ray microbeam diffraction technique is a useful one to investigate the features of the crystal deformation in a localized area. That is, this method have been adopted to examine the density and array of dislocation, microscopic lattice strain and macroscopic residual stress. And so, the informations obtained from the tip of the crack during the fatigue process have been correlated with the behaviours of the initiation and propagation of the crack. The authors, in the present paper, investigated a relation between the distributions of the microscopic lattice strains which are calculated and measured by the technique, and suggested the sort of dislocation at the tip of the crack that relate to the fatigue crack propagation. The crack initiated at the notch root of the specimen which was composed of the coarse grain and propagated along the grain-boundary in the early stage under fatigue process of the alternating stress 4.1 kg/mm(2). Thereafter, it changed the propagating direction toward the inside of the grain. The distributions of the micro lattice strain in each reflecting plane which were measuerd at the plastically deformed zone in the vicinity of the grainboundary and at the crack tip agreed well with modes of the strain distribution due to a screw and a edge dislocations by the calculation, respectively. From these results, the authors concluded that the fatigue crack propagation would relate closely to the changing in the sort of the dislocation from the screw to the edge. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HondaKazuo kn-aut-sei=Honda kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonagaTetsuro kn-aut-sei=Konaga kn-aut-mei=Tetsuro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=1 article-no= start-page=39 end-page=47 dt-received= dt-revised= dt-accepted= dt-pub-year=1975 dt-pub=19750701 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=G.P.zones and Clusters in Al-Zn Alloy and Al-Cu Alloy en-subtitle= kn-subtitle= en-abstract= kn-abstract=As to Al-Zn alloy, the difference between the formation of G.P.zones and that of clusters was investigated by measurements of electrical resistivity. The results obtained were summarised as follows: (1) G.P.zones formed during the quench and quenched-in vacancies increase greatly as-quenched resistivity P(o) as quenching temperature Tq is raised, and clusters increase slightly P(o) as Tq is lowered. (2) For one Tq and one Ta, the time required to reach P(e)' for Al-1.3at % Zn alloy is longer than that for Al-3.0at % Zn alloy. This is due to the difference of number of zinc atom in the clusters. (3) For one Ta and one concentration of zinc, the time required to reach p'(e) at Tq = 170℃ is longer than that at Tq = 300℃. This is due to the difference in concentration of quenchedin vacancies. As to Al-Cu alloy, the solvus temperature for G.P.zones was determined from the existence of P(m) in ageing curves by measurements of electrical resistivity. Consequently the solvus temperature is between 20℃ and 60℃. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhtaMutsuo kn-aut-sei=Ohta kn-aut-mei=Mutsuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HamamotoTakao kn-aut-sei=Hamamoto kn-aut-mei=Takao aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Graduate school of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=1 article-no= start-page=49 end-page=59 dt-received= dt-revised= dt-accepted= dt-pub-year=1975 dt-pub=19750701 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Vacancy-Zn Atom Binding Energy in Al en-subtitle= kn-subtitle= en-abstract= kn-abstract=Binding energy between a vacancy and a Zn atom in Al was investigated by measurement of as-quenched resistivity in Al-0.021at % Zn and pure-Al, with the estimation of vacancy loss during quenching. The contribution of clusters to resistivity in Al-0.021at % Zn waa also investigated. Their results are summarized as follows: (1) The results of isothermal and isochronal annealing indicate that clusters in Al-0.021at % Zn cnuld not be detected beyond the experimental errors. (2) The model applied to estimate the vacancy loss in pure-Al has enough validity. The quantitative estimation of clusters ana the improvement in experimental conditions are greatly desired, which enable the more detailed, analysis of the data. en-copyright= kn-copyright= en-aut-name=OhtaMutsuo en-aut-sei=Ohta en-aut-mei=Mutsuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KawazoeHisami en-aut-sei=Kawazoe en-aut-mei=Hisami kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=SakakibaraAkira en-aut-sei=Sakakibara en-aut-mei=Akira kn-aut-name=榊原精 kn-aut-sei=榊原 kn-aut-mei=精 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Graduate school of Industrial Science affil-num=3 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=7 end-page=15 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Dependency of Stress on the Diffraction Plane in thePolycrystalline Metals en-subtitle= kn-subtitle= en-abstract= kn-abstract=The loading and residual stresses measured by using X-ray stress measurment depend on diffraction plane. In order to make clear its cause, the several models on elastic and plastic deformations are developed and the theoretical values are compared with measured ones. It was found that the dependencies of measured stress on the diffraction plane can be explaned by accepting Reuss's model for elastic deformation and Taylor's model for plastic deformation. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HosokawaNorio kn-aut-sei=Hosokawa kn-aut-mei=Norio aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=2 article-no= start-page=1 end-page=13 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760127 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Effects of Time Constant and Absorption on Stress Measured by X-ray Diffraction Method en-subtitle= kn-subtitle= en-abstract= kn-abstract=The diffracted intensity of X-ray depends upon several physical and geometrical factors such as structure, multiplicity, absorption and Lorentzpolarization and measuring conditions such as time constant and scanning speed of detector on counter method[l]. For analyzing on the X-ray stress measurement, especially, profile shape of X-ray diffraction which is affected by geometrical factors such as absorption and Lorentz-polarization is very important. In order to eliminate these factors affecting the stress measured by using X-ray, the correcting factors were introduced and those theoretical values were calculated. After this theoretical calculation, it is found that as the half value breadth increases the difference between the stress measured by using X-ray and the corrected one becomes larger and larger under same measuring condition. When the ideal diffracted intensity of X-ray is assumed Cauchy distribution the measured stress depends upon measuring condition for same specimen, but it is independent of measuring condition in Gauss, distribution. Consequently, it is found that the stress measured by using X-ray must be corrected under each measuring condition and the method of correction is made clear and proved experimentally in this paper. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HondaKazuo kn-aut-sei=Honda kn-aut-mei=Kazuo aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HosokawaNorio kn-aut-sei=Hosokawa kn-aut-mei=Norio aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SaraiTakaaki kn-aut-sei=Sarai kn-aut-mei=Takaaki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Machanical Engineering. Now at. Okayama College of Science affil-num=3 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=17 end-page=26 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An Investigation on Low Frequency Combustion Oscillation en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with a combustion stability of diffusion flame. A simplified linear differential equation of second order, which involves the parameters estimated from the states of steady combustion, has been suggested to discuss theoretically the nature of oscillatory combusion about a two-dimensional combustion chamber. Its validity has been testified by comparing calculated results with experimental ones. Results obtained have indicated that factors markedly affecting the low-frequency oscillatory combustion are primary volumetric air-fuel ratio, duct length of combustion side, shape of burner and inlet throttles. But outlet throttle gives little effect on the stability of combustion. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimamotoYuzuru kn-aut-sei=Shimamoto kn-aut-mei=Yuzuru aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanakaYutaka kn-aut-sei=Tanaka kn-aut-mei=Yutaka aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=27 end-page=30 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Study of the Work Load in a Monotonous Task en-subtitle= kn-subtitle= en-abstract= kn-abstract=The work load given to workers by a monotonous task was investigated. Their load was obtained by measuring the flicker value and observing its fluctuation pattern. Each flicker fluctuation was classified into one of the three patterns. It was found that the mental load of the subject carrying out the task by himself tends to become lighter according as the speed increases, while the mental load of the subject doing the task with his companion does not show this tendency. On the other hand, the scores of the disposition tests were analyzed with regard to the flicker fluctuation pattern by using the discriminant function. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhgishiShinji kn-aut-sei=Ohgishi kn-aut-mei=Shinji aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=2 article-no= start-page=15 end-page=24 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760127 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An Arrangement of Flow Velocities and Turbulence Profiles of Co-Axial Cold Jet en-subtitle= kn-subtitle= en-abstract= kn-abstract=Results of calculations and experiments on the cold co-axial flow presented in this paper are summalized as follows ; (1) A theoretical expression method for co-axial flow field of two dimension is investigated to estimate more exactly the flow profile and the velocity gradient. (2) Measurements of mixing length were carried out for the confined co-axial jet flow. On the basis of measured data, inquiry is made for the propriety of the assumption proposed in the previous paper (1) that the mixing length may be expressed as a function of the minimum distance to the nearby wall. (3) Experimental inquiry was also done on the corelation between Lagrangian length scale and the mixing length. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimamotoYuzuru kn-aut-sei=Shimamoto kn-aut-mei=Yuzuru aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanakaYutaka kn-aut-sei=Tanaka kn-aut-mei=Yutaka aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Machanical Engineering. Now at. Okayama College of Science END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=2 article-no= start-page=25 end-page=30 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760127 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Synthesis of Ethyl dl-Jasmonate and Ethyl dl-2-Epi-jasmonate en-subtitle= kn-subtitle= en-abstract= kn-abstract=Ethyl dl-jasmonate (1a) and ethyl dl-2-epi-jasmonate (1b), novel constitutents in jasmin absolute from Italian Jasminum grandiflorum L, were prepared from 8-endo-(2'-cis-pentenyl)-3-oxo-2-oxa-bicyclo [3.2.1] octane, jasmine acid δ-lactone(2). Improvement of the preparation of the intermediate (9), a key precursor of (2), was made by different route via lactonization of (7) and/or (8). NMR and IR spectra (la) and (1b) are given. en-copyright= kn-copyright= en-aut-name=ToriiSigeru en-aut-sei=Torii en-aut-mei=Sigeru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TanakaHideo en-aut-sei=Tanaka en-aut-mei=Hideo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=31 end-page=35 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of Warren's Fluidic Counter en-subtitle= kn-subtitle= en-abstract= kn-abstract=Though the Warren's fluidic counter has a very simple construction, the matching problems of the main jet supply pressure with the input pulse may take place and so there may be some working conditions under which this counter cannot work. Up to now, these matching problem have been hardly investigated. In this study the following things were systematically investigated : the static and dynamic characteristics of the memory and the control flip-flops with different geometric parameters, the behavior of the counter which are constructed by two of them, and finally the fow in the counter. The obtained results are as follows : (1) Under some clear and accurate conditions, the Warren's counter works satisfactory without any au iliary circuit. (2) In the control part, the input pulse flow don't reattach on any side wall, but branches into both output ports. (3) The necessary condition under which the Warren's counter behaves successfully is as follows : (1-2α)Q(i)>Q(ms), where α is the distribution factor of the control part, is the input pulse flow rate and is the switching control flow rate of the memory part. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimizuAkira kn-aut-sei=Shimizu kn-aut-mei=Akira aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=2 article-no= start-page=45 end-page=54 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760127 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Control of Magnetizing Inrush Current in a Transformer by Means of Thyristors en-subtitle= kn-subtitle= en-abstract= kn-abstract=When a transformer is energized, the inrush of abnormally high magnetizing current may be noted for a short time until normal flux conditions are established. This may cause the failure of a protective relay, so many preventives are usually accepted for the purpose of normal relay performance. The authors, instead, now have tried to control the inrush current itself, by means of the soft starting method using two reverse parallel thyristors. In this paper, the method to control the inrush current itself, is presented by the soft-starting method using thyristors. The experimental results of this Method verifies the good controlability of the transient magnetic flux of a transformer and then the availability of the control of magnetizing inrush current in the cases of a single phase connection and a three phase one. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSenichiro kn-aut-sei=Nakanishi kn-aut-mei=Senichiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KomatubaraHitoshi kn-aut-sei=Komatubara kn-aut-mei=Hitoshi aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KawataSigeo kn-aut-sei=Kawata kn-aut-mei=Sigeo aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OnishiFujio kn-aut-sei=Onishi kn-aut-mei=Fujio aut-affil-num=5 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TabuchiTakashi kn-aut-sei=Tabuchi kn-aut-mei=Takashi aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=School of Education, Okayama University. affil-num=5 en-affil= kn-affil=MITSUI Ship Building & Engineering Co., LTD., affil-num=6 en-affil= kn-affil=MITSUI Ship Building & Engineering Co., LTD., END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=2 article-no= start-page=55 end-page=61 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760127 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A New Application of Transient Recorder to Magnetic Measurements (Part I: Core Loss Measurement at Very Low Frequencies) en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new method have been developed based upon analogue-to-digital conversion techniques and memories. The method involves the scaling of operating frequency from "real" to "optimum" for the power loss measurement. The advantages of using this techniques are as follows: (1) extreme availability at lower frequency region, (2) high accuracy and high stability, (3) simple measuring procedure, (4) digital indication. This method can be measured the power losses over the frequency range 0.1Hz to 1kHz for magnetic circuit and d.c. to 1kHz in such a purely resistive circuit. We estimate the accuracy of this core loss measuring system within 1.0% over all these frequency range. Using this system, specific core losses of the various grades of silicon iron have been measured in the frequency range 0.1Hz to 200Hz. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MatsubaraKazunori kn-aut-sei=Matsubara kn-aut-mei=Kazunori aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanoMasanori kn-aut-sei=Nakano kn-aut-mei=Masanori aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=47 end-page=53 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Diffusion Phenomena of Silver Ion in Molten Sodium Borate by Chronopotentiometry en-subtitle= kn-subtitle= en-abstract= kn-abstract=Diffusion phenomena of silver ion in the molten sodium diborate of low silver ion content were investigated at the temperature range from 880℃ to 625℃ by means of chronopotentiometry. From the results, it was shown that the silver ion was reduced reversibly to metallic state at the silver electrode used and silver ion was transported only by diffusion in case that transition time in a potential-time relation was within several seconds. Diffusion coefficients measured at various temperatures satisfied Arrhenius equation. The activation energy of diffusion and diffusion coefficient were respectively 32Kcal/mol and 6.5×10(-7) cm(2)/sec at the liquidous temperature. By comparing these values with those obtained in some molten salts, the difference of structure between the molten glass and molten salts was discussed. Moreover, the consideration for the size of borate anion existing in the molten glass was also tried from the viewpoint of rate process and from Stokes-Einstein's equation. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakahashiKatsuaki kn-aut-sei=Takahashi kn-aut-mei=Katsuaki aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MiuraYoshinari kn-aut-sei=Miura kn-aut-mei=Yoshinari aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Chemistry affil-num=2 en-affil= kn-affil=Department of Industrial Chemistry END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=2 article-no= start-page=63 end-page=80 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760127 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The Computer Programs of Layout Methods Based on Decision Making Theory en-subtitle= kn-subtitle= en-abstract= kn-abstract=We tried to look at the allocation techniques in plant layout from the point of view of decision making theory. And it was made clear that Laplace, Minimax and Hurwicz princilpe can be applied to the allocation techniques. The techniques based on these principles were called Laplace method, Minimax method and Hurwicz method. In this paper algorithms and computer programs of these methods were described in order to solve the layout problems effectively. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujiwaraYutaka kn-aut-sei=Fujiwara kn-aut-mei=Yutaka aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Production Engineering, Matsue Technical Collage. affil-num=2 en-affil= kn-affil=Department of Industrial Science, School of Engineering Okayama University affil-num=3 en-affil= kn-affil=Department of Industrial Science, School of Engineering Okayama University END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=2 article-no= start-page=81 end-page=111 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760127 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Study of Magnetic Properties of Solid Oxygen, Oxygen-Argon and Oxygen-Fluorine en-subtitle= kn-subtitle= en-abstract= kn-abstract=To acquire information on the interaction between oxygen molecules in solid phase, studies have been carried out on the magnetic properties of solid oxygen, oxygen-argon and oxygen-fluorine. Review of the studies on the interaction between oxygen molecules is cited. Magnetic susceptibility was measured by the Faraday method as a function of temperature from 12 K to the melting point of them. Pure oxygen both in α and β phase indicates paramagnetism corresponding to long-range antiferromagnetic order. Oxygen -argon mixtures of 92~66 mol% oxygen content indicate large susceptibility corresponding to δ phase, which can be interpreted in terms of the cluster of oxygen molecules in trimer. Small paramagnetism was found for the oxygenfluorine mixture even as dilute as 10 mol% oxygen content, which may be due to the strong antiferromagnetic interaction. This can be interpreted in terms of super-exchange interaction between oxygen molecules via fluorine molecule. en-copyright= kn-copyright= en-aut-name=SakakibaraAkira en-aut-sei=Sakakibara en-aut-mei=Akira kn-aut-name=榊原精 kn-aut-sei=榊原 kn-aut-mei=精 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=55 end-page=59 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Biologically Active Compounds. IV. The Synthesis of α-Arylamino-γ-aryl-⊿(α,β)- and α-Arylidene-γ-aryl-⊿(β,γ)-butenolides. en-subtitle= kn-subtitle= en-abstract= kn-abstract=The importance of the presence of butenolide groupings in biologically active substances has been recognized increasingly. (1) In our search for new pesticides we have prepared 26 α-arylamino-γ-aryl-⊿(α,β)-butenolides (1-26) and 9 α-arylidene-γ-aryl-⊿(α,β)-butenolides (27-35) which seemed to us of interest as test materials for the screening. α-Arylamino-γ-aryl-⊿(α,β)-butenolides were prepared by the reaction of sodium or potassium arylidenepyruvate with arylamines in the medium of glacial acetic acid as is reported by Meyer and Vaughan(2) (Scheme I, see also Experimental Section). α-Arylidene-γ-aryl-⊿(β,γ)-butenolides were prepared by the condensation of aromatic aldehydes with β-aroylpropionic acids in the presence of anhydrous sodium acetate. The analogous procedure for this purpose has been reported by several authors(3) (Scheme II). The physical properties, yields, and analytical data of these compounds have been summarized in Table I (1-26) and Table II (27-35). en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TakedaAkira kn-aut-sei=Takeda kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaSatosi kn-aut-sei=Wada kn-aut-mei=Satosi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=UnoTakaaki kn-aut-sei=Uno kn-aut-mei=Takaaki aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitaHaruki kn-aut-sei=Fujita kn-aut-mei=Haruki aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoTuneyuki kn-aut-sei=Okamoto kn-aut-mei=Tuneyuki aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Synthetics Chemistry affil-num=2 en-affil= kn-affil=Department of Synthetics Chemistry affil-num=3 en-affil= kn-affil=Department of Synthetics Chemistry affil-num=4 en-affil= kn-affil=Mitsubisisekiyu Co., Kurasiki. affil-num=5 en-affil= kn-affil=Taiyogomu Co., Okayama. END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=2 article-no= start-page=113 end-page=136 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760127 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Study on Non-steady Groundwater Flow in a Semi-confined Aquifer en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with the groundwater flow in a semi-confined aquifer causing the phenomena of consolidation and free surface lowering. Since the main effect of consolidation has taken place before noticeable lowering of the free surface, one may solve each phenomenon on its own. The real solution may be obtained by the principle of superposition. However, the solution for lowering the free surface is delayed due to the cosolidation by a certain timelapse, depending on the placecoordinates. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KonoIchiro kn-aut-sei=Kono kn-aut-mei=Ichiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SellmeijerJ.B. kn-aut-sei=Sellmeijer kn-aut-mei=J.B. aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Civil Engineering affil-num=2 en-affil= kn-affil=Visiting Researcher, Delft Technological University, The Netherland END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=1 end-page=24 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Numerical Analysis of Oscillatory Combustion Phenomena generated in A Pipe-Type Combustor en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, is proposed a calculating method for the simulation of oscillatory combustion state, and comparisons between estimation results and experimental ones are carried out. With respect to the effects of geometric dimensions of combustion system, and of fueland air-flow rate conditions on characteristics such as an amplitude of oscillation, its fluctuation, and a frequency, a theoretical analysis presents a correct estimation of the phenomena. By use of this analysis, it becomes possible exactly to estimate the changes which take place in the combustion system. On the basis of the quantitative feature of the theoretical results, the influences of the factors such as ignition lag, wall temperature ratio, and heat transmission on the combustion oscillation are studied. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanakaYutaka kn-aut-sei=Tanaka kn-aut-mei=Yutaka aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=61 end-page=66 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An Asynchronous Delay Line for PAM Signal en-subtitle= kn-subtitle= en-abstract= kn-abstract=An asynchronous delay line for PAM signal having controlled delay capability is proposed. The delay line in a cascaded chain of identical memory cells. Each sample of the sequence of the input PAM signals passes or is shifted in particular cell depending on whether the succeeding cell is empty or not. A cell is composed of two memory capacitors with the peripheral control circuits. In this paper, especially, an example of the circuit for cell is shown and its several characteristics are discussed. At the end, some experimental results are given. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoTakuji kn-aut-sei=Okamoto kn-aut-mei=Takuji aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoHideki kn-aut-sei=Yamamoto kn-aut-mei=Hideki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics affil-num=3 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=45 end-page=52 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Basic Characteristics of Squarewave Irwerter Circuit with Series R-L Load en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, the steady state operations of the squarewave inverter circuit with a series R-L load are discussed. The circuit consists of transistors and feedback diodes. The basic equation is derived from its equivalent circuit. Solving the basic equation with steady state conditions, the instaneous value of the load current i is derived. The period t(2) for which the current flows from the supply to the load and the period t(l) for which the current feedbacks through diodes from the load to the supply are calculated from (i), and the ratio of t(l) to t(2) is illustrated using power factor of fundamental wave, pf, as a variable. The ratios of transistor mean current I(tr), diode mean current I(D), supply mean current I(s) to the load current I are illustrated using pf as a variable, too. In result, each current ratios to I is shown in simple expressione. The load current can be calculated simply using the coefficient reading off the figure. In addition, it becomes clear from the figure that the load current is scarcely influenced by the harmonic voltage in less than 0.8 of pf. The ratio t(2)/(t(1)+t(2)) calculated in squarewave voltage, shows the limit of pulse width control whose out put voltage is the squarewave. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AgusaToru kn-aut-sei=Agusa kn-aut-mei=Toru aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Graduate School of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=11 cd-vols= no-issue=1 article-no= start-page=7 end-page=18 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Anomalous Electric Fields in n-InSb under High Magnetic Fields. I-Experiment en-subtitle= kn-subtitle= en-abstract= kn-abstract=An investigation was made of the anomalous electric field in its various aspects in n-type InSb subjected to strong magnetic field at 77K and 273K, which lead to the conclusion that no open contradiction arose between a part of the present observations and the predictions attainable from Yoshida's model of semimetals. There remained, however, the other part of the experimental results unexplained, being rather natural since an inner property of indium antimonide does not seem so simple comparing with the compensated metals, bismuth and antimony. Especially as for the mechanism of an inversion phenomenon of the polarity of a negative anomalous field at a critical pulse current, we have no available theory to explain at present stage. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiiTadao kn-aut-sei=Ishii kn-aut-mei=Tadao aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=DoiMitsuharu kn-aut-sei=Doi kn-aut-mei=Mitsuharu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=53 end-page=64 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=AC Chopper Circuit with Lagging Reactive Load en-subtitle= kn-subtitle= en-abstract= kn-abstract=An ac chopper circuit, which chops an ac voltage in a complete cycle for any lagging reactive load, is devised. The circuit is constructed of two ac-switches composed of power transistors and diodes. The load voltage is smoothly controlled by varying the time ratio of ac-switch. Transistors operate in a highfrequency chopping mode, thereby the ripples of the source current and the load current are easily filtered. Furthermore the input power factor of this model is better than that of the thyristor phase control circuit. In this paper, the construction and the driving method of this model are described. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FunabikiShigeyuki kn-aut-sei=Funabiki kn-aut-mei=Shigeyuki aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSenichiro kn-aut-sei=Nakanishi kn-aut-mei=Senichiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=11 cd-vols= no-issue=1 article-no= start-page=19 end-page=30 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Optimal Control of a Nuclear Power Reactor Core with a Coupled Nuclear Thermo-hydrodynamics Model en-subtitle= kn-subtitle= en-abstract= kn-abstract=An optimal control is giyen for regulating power distribution in a nuclear power reactor which has cylindrical geometry. The space dependence of the system is described by expanding space depenident variables by Helmholtz modes. Results are obtained through the principle of optimality and are described by the Riccati-type algebraic equation that the optimal feedback coefficients should satisfy. Use of an integral equation as the system equation makes it possible to deal with actual controlling apparatuses: control rods or rod clusters. en-copyright= kn-copyright= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name=古賀隆治 kn-aut-sei=古賀 kn-aut-mei=隆治 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=65 end-page=81 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Computer Program for Numerical Evaluation of the work en-subtitle= kn-subtitle= en-abstract= kn-abstract=We try to evaluate the manual work numerically from a point of view of the homogeneousness and the simultaneousness of both hands using the results of the micromotion study. The weighted coefficient and the balance index are used to evaluate the homogeneousness of both hands. And the simultaneous index is used to evaluate the simultaneous movement of both hands. It is necessary to make a program in order to use efficiently the method to calculate the indexes or the coefficients. Therefore the computer program of these methods is mentioned in this paper. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=UshioJunichi kn-aut-sei=Ushio kn-aut-mei=Junichi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OsakiHirokazu kn-aut-sei=Osaki kn-aut-mei=Hirokazu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KikuchiSusumu kn-aut-sei=Kikuchi kn-aut-mei=Susumu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science affil-num=3 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=11 cd-vols= no-issue=1 article-no= start-page=31 end-page=43 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An Analysis of Highway On-ramp Merging by Queuing Theory en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper we deal with traffic behaviours on a section of highway including an on-ramp by means of queuing theory. It is the purpose of this paper to provide the adequate capacity for highway on-ramps, which is useful for the design of on-ramps and the traffic control of highway. The highway on-ramp merging is modeled as a queue and the system is solved. Then the maximum possible flows for merging from an on-ramp is obtained in a form of an function of through lane flows. The traffic capacity of an on-ramp is estimated from the relation between the average waiting time before merging and the incoming flow from an on-ramp, which is induced by the theory of queues. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InouyeHiroshi kn-aut-sei=Inouye kn-aut-mei=Hiroshi aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Department of civil Engineering END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=83 end-page=93 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Computer Program of Line Balancing, Regarding Efficiency and Number of Stations as Variables en-subtitle= kn-subtitle= en-abstract= kn-abstract=To assign work elements to the work stations in an assembly or manufacturing line, various computer programs have been developed and used. And it does that the number of stations or the cycle time is even given. But in practice it is desirable to obtain the assignment which shows the highest efficiency of line balancing under all possible combinations of the number of stations and the cycle time. Therefore we propose a computer program of the assignment method in which the efficiency of line balancing, Ebb and the number of stations, NN are regarded as variables. In this method the minimum value (EEb) of efficiency and the constant term (d) by which Ebb is reduced are given previously. And for any COmbination of Ebb (EE