| 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 | 10.18926/15665 |
|---|---|
| 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 | 10.18926/15664 |
|---|---|
| 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 | 10.18926/15663 |
|---|---|
| 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 | 10.18926/15662 |
|---|---|
| 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 | 10.18926/15661 |
|---|---|
| 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 | 10.18926/15660 |
|---|---|
| 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 | 10.18926/15659 |
|---|---|
| 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 | 10.18926/15658 |
|---|---|
| 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 | 10.18926/15657 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_8_1_25.pdf |
| Author | Wada Tsutomu| Shimizu Akira| Takagi Minoru| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1973-07-20 |
| Volume | volume8 |
| Issue | issue1 |
| Start Page | 25 |
| End Page | 40 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307550 |
| JaLCDOI | 10.18926/15656 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_8_1_15.pdf |
| Author | Fujiwara Yutaka| Osaki Hirokazu| Kikuchi Susumu| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1973-07-20 |
| Volume | volume8 |
| Issue | issue1 |
| Start Page | 15 |
| End Page | 24 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307280 |
| JaLCDOI | 10.18926/15655 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_8_1_1.pdf |
| Author | Nakata Takayoshi| Ishihara Yoshiyuki| Nakano Masanori| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1973-07-20 |
| Volume | volume8 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 14 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307897 |
| JaLCDOI | 10.18926/15654 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_7_2_89.pdf |
| Author | Nakata Takayoshi| Ishihara Yoshiyuki| Morimoto Hideki| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1972-10-13 |
| Volume | volume7 |
| Issue | issue2 |
| Start Page | 89 |
| End Page | 100 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307260 |
| JaLCDOI | 10.18926/15653 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_7_2_85.pdf |
| Author | Nakata Takayoshi| Ishihara Yoshiyuki| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1972-10-13 |
| Volume | volume7 |
| Issue | issue2 |
| Start Page | 85 |
| End Page | 88 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307535 |
| JaLCDOI | 10.18926/15650 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_7_2_49.pdf |
| Author | Hosokawa Norio| Kodera Yoichi| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1972-10-13 |
| Volume | volume7 |
| Issue | issue2 |
| Start Page | 49 |
| End Page | 60 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307885 |
| JaLCDOI | 10.18926/15649 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_7_1_43.pdf |
| Author | Kaneda Masahiro| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1972-07-10 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 43 |
| End Page | 48 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307213 |
| JaLCDOI | 10.18926/15648 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_7_1_31.pdf |
| Author | Ishii Tadao| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1972-07-10 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 31 |
| End Page | 42 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307574 |
| JaLCDOI | 10.18926/15647 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_7_1_25.pdf |
| Author | Sano Hiroya| Tanada Yoshihiro| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1972-06-01 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 25 |
| End Page | 29 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307218 |
| JaLCDOI | 10.18926/15644 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_7_1_1.pdf |
| Author | Osaki Hirokazu| Kikuchi Susumu| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1972-07-10 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 9 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307630 |
| JaLCDOI | 10.18926/15643 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_6_67.pdf |
| Author | Nakata Takayoshi| Ishihara Yoshiyuki| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1971-09-01 |
| Volume | volume6 |
| Issue | issue1 |
| Start Page | 67 |
| End Page | 82 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307626 |
