| JaLCDOI | 10.18926/15658 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_8_1_41.pdf |
| Author | Ishii Tadao| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1973-07-20 |
| Volume | volume8 |
| Issue | issue1 |
| Start Page | 41 |
| End Page | 43 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307505 |
| JaLCDOI | 10.18926/15659 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_8_2_44.pdf |
| Author | Hirose Koji| Nobunaka Masayuki| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1973-12-26 |
| Volume | volume8 |
| Issue | issue2 |
| Start Page | 44 |
| End Page | 51 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307703 |
| JaLCDOI | 10.18926/15660 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_8_2_52.pdf |
| Author | Wada Tsutomu| Shimizu Akira| Dohta Shujiro| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1973-12-26 |
| Volume | volume8 |
| Issue | issue2 |
| Start Page | 52 |
| End Page | 65 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307728 |
| JaLCDOI | 10.18926/15661 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_8_2_66.pdf |
| Author | Fukui, Kiyoshi| Nogi, Shigeji| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1973-12-26 |
| Volume | volume8 |
| Issue | issue2 |
| Start Page | 66 |
| End Page | 74 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307916 |
| JaLCDOI | 10.18926/15662 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_9_1_1.pdf |
| Author | Hirose Koji| Fujiwara Tadao| |
| 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%. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1974-07-20 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 9 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307952 |
| JaLCDOI | 10.18926/15663 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_9_1_11.pdf |
| Author | Ohta Mutsuo| Nagai Makoto| |
| 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℃. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1974-07-20 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 11 |
| End Page | 21 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307817 |
| JaLCDOI | 10.18926/15664 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_9_1_23.pdf |
| Author | Misaki Takayoshi| Yamamoto Hideki| Itaka Koshi| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1974-07-20 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 23 |
| End Page | 33 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307363 |
| JaLCDOI | 10.18926/15665 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_9_2_35.pdf |
| Author | Nishiwaki Kazuie| Shimamoto Yuzuru| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1974-12-25 |
| Volume | volume9 |
| Issue | issue2 |
| Start Page | 35 |
| End Page | 45 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307277 |
| JaLCDOI | 10.18926/15666 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_9_2_47.pdf |
| Author | Torii Sigeru| Uneyama Kenji| Ishihara Masakazu| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1974-12-25 |
| Volume | volume9 |
| Issue | issue2 |
| Start Page | 47 |
| End Page | 51 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307176 |
| JaLCDOI | 10.18926/15667 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_9_2_53.pdf |
| Author | Torii, Sigeru| Tanaka, Hideo| Mandai, Tadakatsu| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1974-12-25 |
| Volume | volume9 |
| Issue | issue2 |
| Start Page | 53 |
| End Page | 61 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307121 |
| JaLCDOI | 10.18926/15670 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_9_2_89.pdf |
| Author | Osaki Hirokazu| Kikuchi Susumu| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1974-12-25 |
| Volume | volume9 |
| Issue | issue2 |
| Start Page | 89 |
| End Page | 105 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307514 |
| JaLCDOI | 10.18926/15671 |
|---|---|
| FullText URL | 009_02_107_118.pdf |
| Author | Okamoto Takuji| Misaki Takayoshi| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1974-12-25 |
| Volume | volume9 |
| Issue | issue2 |
| Start Page | 107 |
| End Page | 118 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307235 |
| JaLCDOI | 10.18926/15672 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_4_51.pdf |
| Author | Takahashi Teruo| Akagi Yasuharu| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1969-09-01 |
| Volume | volume4 |
| Issue | issue1 |
| Start Page | 51 |
| End Page | 56 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307449 |
| JaLCDOI | 10.18926/15673 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_4_57.pdf |
| Author | Takahashi Teruo| Kitamura Yoshiro| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1969-09-01 |
| Volume | volume4 |
| Issue | issue1 |
| Start Page | 57 |
| End Page | 64 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307482 |
| JaLCDOI | 10.18926/15674 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_10_1_1.pdf |
| Author | Nakajima Toshikatsu| Nakagawa Heisaburo| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1975-07-01 |
| Volume | volume10 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 16 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307122 |
| JaLCDOI | 10.18926/15675 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_4_65.pdf |
| Author | Himei Toyoji| Fujitsuka Takeshi| Inoue Jyunichi| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1969-09-01 |
| Volume | volume4 |
| Issue | issue1 |
| Start Page | 65 |
| End Page | 73 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307309 |
| JaLCDOI | 10.18926/15676 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_10_1_17.pdf |
| Author | Osaki Hirokazu| Kikuchi Susumu| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1975-07-01 |
| Volume | volume10 |
| Issue | issue1 |
| Start Page | 17 |
| End Page | 37 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307596 |
| JaLCDOI | 10.18926/15677 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_5_1.pdf |
| Author | Honda Kazuo| Konaga Tetsuro| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1970-09-01 |
| Volume | volume5 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 6 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307657 |
| JaLCDOI | 10.18926/15678 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_10_1_39.pdf |
| Author | Ohta Mutsuo| Hamamoto Takao| |
| 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℃. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1975-07-01 |
| Volume | volume10 |
| Issue | issue1 |
| Start Page | 39 |
| End Page | 47 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307266 |
| JaLCDOI | 10.18926/15679 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_10_1_49.pdf |
| Author | Ohta, Mutsuo| Kawazoe, Hisami| Sakakibara, Akira| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1975-07-01 |
| Volume | volume10 |
| Issue | issue1 |
| Start Page | 49 |
| End Page | 59 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307807 |
