検索条件

閉じる

検索結果 9304 件

JaLCDOI 10.18926/15694
フルテキストURL Mem_Sch_Eng_OU_5_55.pdf
著者 Takeda Akira| Wada Satosi| Uno Takaaki| Fujita Haruki| Okamoto Tuneyuki|
抄録 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).
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1970-09-01
5巻
1号
開始ページ 55
終了ページ 59
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307512
JaLCDOI 10.18926/15693
フルテキストURL Mem_Sch_Eng_OU_10_2_81.pdf
著者 榊原 精|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1976-01-27
10巻
2号
開始ページ 81
終了ページ 111
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307359
JaLCDOI 10.18926/15692
フルテキストURL Mem_Sch_Eng_OU_10_2_63.pdf
著者 Fujiwara Yutaka| Osaki Hirokazu| Kikuchi Susumu|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1976-01-27
10巻
2号
開始ページ 63
終了ページ 80
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307132
JaLCDOI 10.18926/15691
フルテキストURL Mem_Sch_Eng_OU_5_47.pdf
著者 Takahashi Katsuaki| Miura Yoshinari|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1970-09-01
5巻
1号
開始ページ 47
終了ページ 53
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307810
JaLCDOI 10.18926/15690
フルテキストURL Mem_Sch_Eng_OU_10_2_55.pdf
著者 Nakata Takayoshi| Ishihara Yoshiyuki| Matsubara Kazunori| Nakano Masanori|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1976-01-27
10巻
2号
開始ページ 55
終了ページ 61
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307969
JaLCDOI 10.18926/15688
フルテキストURL Mem_Sch_Eng_OU_10_2_45.pdf
著者 Himei Toyoji| Nakanishi Senichiro| Komatubara Hitoshi| Kawata Sigeo| Onishi Fujio| Tabuchi Takashi|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1976-01-27
10巻
2号
開始ページ 45
終了ページ 54
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307871
JaLCDOI 10.18926/15686
フルテキストURL Mem_Sch_Eng_OU_5_31.pdf
著者 Wada Tsutomu| Shimizu Akira|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1970-09-01
5巻
1号
開始ページ 31
終了ページ 35
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307883
JaLCDOI 10.18926/15685
フルテキストURL Mem_Sch_Eng_OU_10_2_25.pdf
著者 Torii, Sigeru| Tanaka, Hideo|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1976-01-27
10巻
2号
開始ページ 25
終了ページ 30
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307609
JaLCDOI 10.18926/15684
フルテキストURL Mem_Sch_Eng_OU_10_2_15.pdf
著者 Shimamoto Yuzuru| Tanaka Yutaka|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1976-01-27
10巻
2号
開始ページ 15
終了ページ 24
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307794
JaLCDOI 10.18926/15683
フルテキストURL Mem_Sch_Eng_OU_5_27.pdf
著者 Kikuchi Susumu| Osaki Hirokazu| Ohgishi Shinji|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1970-09-01
5巻
1号
開始ページ 27
終了ページ 30
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307841
JaLCDOI 10.18926/15682
フルテキストURL Mem_Sch_Eng_OU_5_17.pdf
著者 Shimamoto Yuzuru| Tanaka Yutaka|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1970-09-01
5巻
1号
開始ページ 17
終了ページ 26
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307571
JaLCDOI 10.18926/15681
フルテキストURL Mem_Sch_Eng_OU_10_2_1.pdf
著者 Honda Kazuo| Hosokawa Norio| Sarai Takaaki|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1976-01-27
10巻
2号
開始ページ 1
終了ページ 13
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307339
JaLCDOI 10.18926/15680
フルテキストURL Mem_Sch_Eng_OU_5_7.pdf
著者 Hosokawa Norio|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1970-09-01
5巻
1号
開始ページ 7
終了ページ 15
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307629
JaLCDOI 10.18926/15679
フルテキストURL Mem_Sch_Eng_OU_10_1_49.pdf
著者 Ohta, Mutsuo| Kawazoe, Hisami| 榊原 精|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1975-07-01
10巻
1号
開始ページ 49
終了ページ 59
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307807
JaLCDOI 10.18926/15678
フルテキストURL Mem_Sch_Eng_OU_10_1_39.pdf
著者 Ohta Mutsuo| Hamamoto Takao|
抄録 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℃.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1975-07-01
10巻
1号
開始ページ 39
終了ページ 47
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307266
JaLCDOI 10.18926/15677
フルテキストURL Mem_Sch_Eng_OU_5_1.pdf
著者 Honda Kazuo| Konaga Tetsuro|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1970-09-01
5巻
1号
開始ページ 1
終了ページ 6
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307657
JaLCDOI 10.18926/15676
フルテキストURL Mem_Sch_Eng_OU_10_1_17.pdf
著者 Osaki Hirokazu| Kikuchi Susumu|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1975-07-01
10巻
1号
開始ページ 17
終了ページ 37
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307596
JaLCDOI 10.18926/15675
フルテキストURL Mem_Sch_Eng_OU_4_65.pdf
著者 Himei Toyoji| Fujitsuka Takeshi| Inoue Jyunichi|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1969-09-01
4巻
1号
開始ページ 65
終了ページ 73
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307309
JaLCDOI 10.18926/15674
フルテキストURL Mem_Sch_Eng_OU_10_1_1.pdf
著者 Nakajima Toshikatsu| Nakagawa Heisaburo|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1975-07-01
10巻
1号
開始ページ 1
終了ページ 16
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307122
JaLCDOI 10.18926/15673
フルテキストURL Mem_Sch_Eng_OU_4_57.pdf
著者 Takahashi Teruo| Kitamura Yoshiro|
抄録 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.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1969-09-01
4巻
1号
開始ページ 57
終了ページ 64
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002307482