JaLCDOI 10.18926/15560
FullText URL Mem_Sch_Eng_OU_1_138.pdf
Author Ohta Mutsuo| Hashimoto Fumio| Tanimoto Tadashi|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 138
End Page 147
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307592
JaLCDOI 10.18926/15559
FullText URL Mem_Sch_Eng_OU_1_134.pdf
Author Ohta Mutsuo|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 134
End Page 137
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307180
JaLCDOI 10.18926/15558
FullText URL Mem_Sch_Eng_OU_1_130.pdf
Author Wada Tsutomu| Ohgishi Shinji|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 130
End Page 133
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307865
JaLCDOI 10.18926/15557
FullText URL Mem_Sch_Eng_OU_1_120.pdf
Author Wada Tsutomu| Sawaragi Yosikazu| Yonezawa Yoo|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 120
End Page 129
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307543
JaLCDOI 10.18926/15556
FullText URL Mem_Sch_Eng_OU_1_116.pdf
Author Takamatsu Takeichiro| Sayama Hayatoshi|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 116
End Page 119
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307194
JaLCDOI 10.18926/15555
FullText URL Mem_Sch_Eng_OU_1_110.pdf
Author Takamatsu Takeiciro| Sayama Hayatoshi| Tonoike Takao|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 110
End Page 115
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307978
JaLCDOI 10.18926/15554
FullText URL Mem_Sch_Eng_OU_1_106.pdf
Author Kikuchi Susumu| Harano Hiromi| Miyazaki Yoshiyuki|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 106
End Page 109
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307356
JaLCDOI 10.18926/15553
FullText URL Mem_Sch_Eng_OU_1_98.pdf
Author Kikuchi Susumu| Tomiya Nobuaki|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 98
End Page 105
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307672
JaLCDOI 10.18926/15552
FullText URL Mem_Sch_Eng_OU_1_91.pdf
Author Kikuchi Susumu| Matuda Motoi|
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)
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 91
End Page 97
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307525
JaLCDOI 10.18926/15551
FullText URL Mem_Sch_Eng_OU_1_84.pdf
Author Misaki Takayoshi| Kato Osamu|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 84
End Page 90
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307680
JaLCDOI 10.18926/15550
FullText URL Mem_Sch_Eng_OU_1_78.pdf
Author Himei Toyoji| Inoue Jyunichi| Fukumori Kooichi|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 78
End Page 83
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307828
JaLCDOI 10.18926/15549
FullText URL Mem_Sch_Eng_OU_1_70.pdf
Author Nakata Takayoshi| Ishihara Yoshiyuki| Moriyasu Tadataka|
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))
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 70
End Page 77
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307723
JaLCDOI 10.18926/15548
FullText URL Mem_Sch_Eng_OU_1_63.pdf
Author Mine Tadao| Yamamoto Tatuma| Baba Yukinobu|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 63
End Page 69
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307143
JaLCDOI 10.18926/15547
FullText URL Mem_Sch_Eng_OU_1_59.pdf
Author Yamashista Yuhiko| Yokoyama Fumiyoshi| Monobe Kazuo|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 59
End Page 62
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307666
JaLCDOI 10.18926/15546
FullText URL Mem_Sch_Eng_OU_1_54.pdf
Author Moriwake Tosio|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 54
End Page 58
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307698
JaLCDOI 10.18926/15545
FullText URL Mem_Sch_Eng_OU_1_51.pdf
Author Moriwake Tosio|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 51
End Page 53
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307140
JaLCDOI 10.18926/15544
FullText URL Mem_Sch_Eng_OU_1_47.pdf
Author Takeda Akira| Wada Satosi| Ohmura Yutaka|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 47
End Page 50
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307888
JaLCDOI 10.18926/15543
FullText URL Mem_Sch_Eng_OU_1_44.pdf
Author Takeda Akira| Torii Sigeru|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 44
End Page 46
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307861
JaLCDOI 10.18926/15542
FullText URL Mem_Sch_Eng_OU_1_37.pdf
Author Takahashi Katsuaki| Tanioka Mamoru| Yoshio Tetsuo|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 37
End Page 43
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307624
JaLCDOI 10.18926/15540
FullText URL Mem_Sch_Eng_OU_1_29.pdf
Author Takahashi Teruo|
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.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1966-03-31
Volume volume1
Issue issue1
Start Page 29
End Page 36
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307556