巻号一覧
23 巻, 9 号
選択された号の論文の10件中1～10を表示しています
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辻 二郎, 河田 幸三1954 年 23 巻 9 号 p. 387-394
発行日: 1954/09/10
公開日: 2009/02/09
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黒柳 準1954 年 23 巻 9 号 p. 395-397
発行日: 1954/09/10
公開日: 2009/02/20
ジャーナル フリーEffects of cold-drawing and annealing on the rigidity of copper wire observed by the method of torsion pendulum are as shown in Figs. 1_??_11 which are:
(1) The rigidity increases with the annealing temperature. Beyond a certain temperature (T1), the increase is very rapid.
(2) The rigidity reaches maximum at a certain temperature (T2).
(3) Both these transition temperatures rise with the lowering of the degree of cold-work. By extrapolation, these temperatures for a perfectly annealed specimen are 320°C and 380°C re-spectively.
(4) The difference of rigidity at the two temperatures T1 and T2 decreased with the decrease of the cold-work, and the difference became zero for perfectly annealed specimens.抄録全体を表示PDF形式でダウンロード (199K) -
西垣 茂1954 年 23 巻 9 号 p. 398-401
発行日: 1954/09/10
公開日: 2009/02/09
ジャーナル フリーIn order to study the segregation along the surface of polycrystalline specimen, a new type X-ray camera and tube have been made. The camera has twenty slits of 0.5mm×2mm each, arrenged vertically, 4mm apart on another. Twenty one horizontal screening plates with 4mm spacings are set up between a specimen and a photographic film joining the row of slits crosswise with the edges of the plats, thus making one narrow partition for every slit. The X-ray tube has a long filament, traget and window supplying simultaneous parallel beams through twenty pinhole-systems irradiating the surface of the specimen via the partitions and slits. Diffraction ring are cut by the screening plats leaving only their equatorial parts which appear as pairs of continuations of twenty small line pieces revealing whether the lattice constant is the same all along the surface or not according as the lines being straight and paralel or otherwise. the camera was tested with pure silver plate of 8cm in length, Cu-Be alloy plate of 6cm with Be segregation and seven Cu-Ti alloy plates of various compositions with satisfactory results.抄録全体を表示PDF形式でダウンロード (1109K) -
西垣 茂, 宮城 政和1954 年 23 巻 9 号 p. 401-405
発行日: 1954/09/10
公開日: 2009/02/20
ジャーナル フリーFor the study of solubility curve of alloys, a new method has been developed in which a specimen of long plate form is held for any desired length of time in a furnace which has a definite thermal gradient and then quonched. At a room temperature, many points on the surface along the length of the specimen are irradiated and photographed simultaneously by the device described in the foregoing paper by one of the authors. The precipitation velocity for the specimen treated at temperatures within the range of applied thermal gradient can easily be obtained by this method. The rate of precipitation is de_??_uced as P=Ktn where P is the precipitation, K a constant, t the time and n a positive exponent. Equilibrium conditions at respective tempertures can be computed by this equation.
The method was applied the system Cu-Be with the results: 1) the curve given by Tanimura-Wasserman is of equilibrium state above 450°C but not below, 2) Beryllium contents of α in equilibrium stats at 300°C is about 0.04%.抄録全体を表示PDF形式でダウンロード (2086K) -
加瀬 滋男1954 年 23 巻 9 号 p. 406-409
発行日: 1954/09/10
公開日: 2009/02/09
ジャーナル フリーFurther development of the preceding paper bearing the same title is attempted. That is, the present paper discusses the problem of estimating some parameters in the doubly exponential distribution which is inevitable to quality control for analyzing with tensile data of rubber whether the process of producing rubber goods has been statistically controlled. It is concluded, from the advantage to give always the unbiased and minimum-variance estimator, that the most desirable method for estimation of parameters in such a case is the, order-statistics method whose practical procedure is also described in detail.抄録全体を表示PDF形式でダウンロード (330K) -
高橋 喜久雄1954 年 23 巻 9 号 p. 410-416
発行日: 1954/09/10
公開日: 2009/02/09
ジャーナル フリーHigh resistances above 1010 Ohms are measured by various methods, such as
1) by observing, the rate of discharge of a sensitive electoroscope through the lesulater in .question.
2) by observing the deflection of a sensitive galvanometer caused by, the leakage current, and
3) by the method in which the insulator and a standard high resistance are potentiometrically combined and the potential difference at both ends of the insulator is amplified and measured by a valve voltmeter.
But the measurement becomes repidly uncertain with decreasing leakage. It is quite natural that a good insulator reveals an apparent, capacity caused by absorption or adhering of electric charge at a high potential, even if it has a very simple geometrical form as a cylindrical rod or a plate.
Therefore in the leakage measurement of a good insulator, it is essential to investigate the complex behavior of capacity and leakage of a good insulator at a high potential.
In the present work, a method of integration of the leakage current is employed considering Cz and Zc. (Cf. Fig. 1 (a))2 Fortunately the network, with a restriction of initial conditions
(i1)0=V/Z and (VC)0=0, is transformed into an equivalent circuit (Cf. Fig. 1 (b)) and is simply analysed as
Vc=V'{1-exp(-t/Z'C')}.
where V'=ZcV/Z+Zc Z'=ZZc/Z+Zc' C'=C+Cz
and by expanding Vc in a power series of t we get Z=t/p(C+Cz)
where p is a parameter taken as the ratio of potentials Vc/V and t the time of integration. Thus Zc is elliminated.
Accordingly a new method of integration can easily be developed and Z=1014 Ohms is easily detected if we take p=10-3, C=10-9F and t=102 sec. The limit of possibility of the measurement is estimated as 1015 or 1016 Ohms by inserting a galvanometer in place of μ A-meter in a self-recording valve voltmeter. (Cf. Fig. 8)抄録全体を表示PDF形式でダウンロード (1194K) -
伊藤 清一, 鈴木 彬1954 年 23 巻 9 号 p. 416-421
発行日: 1954/09/10
公開日: 2009/02/09
ジャーナル フリーMechanism of water-suction and water vapour-sorption is studied on wood, the most im-portant building material. Moisture distribution in a specimen after it is soaked in water for a short time is traced by measuring electric resistance. Change of weight of the specimen is observed under constant conditions of temperature and humidity. Empirical formula for the process of water-suction is derived.抄録全体を表示PDF形式でダウンロード (1370K) -
吉原 邦夫, 松田 壯時1954 年 23 巻 9 号 p. 422-423
発行日: 1954/09/10
公開日: 2009/02/09
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河田 幸三1954 年 23 巻 9 号 p. 423-424
発行日: 1954/09/10
公開日: 2009/02/09
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古屋 茂1954 年 23 巻 9 号 p. 425-428
発行日: 1954/09/10
公開日: 2009/02/09
ジャーナル フリーPDF形式でダウンロード (328K)
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