巻号一覧
10 巻, 12 号
選択された号の論文の13件中1～13を表示しています
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Sadaaki Yanagawa1955 年 10 巻 12 号 p. 1029-1032
発行日: 1955/12/05
公開日: 2007/06/01
ジャーナル 認証ありAn simplified expression for the orbit-orbit interactions in terms of scalar products of tensor operators is derived for ln configurations by use of the method of Racah. Main contribution of the interactions is given in the form −βL(L+1), β being a positive constant.
Analyses are made for 4p2 and 5p4 configurations of GeI, AsII and TeI by taking the effects of the orbit-orbit interactions into account. The agreement between theoretical and experimental values of terms are satisfactory for GeI and AsII.抄録全体を表示PDF形式でダウンロード (436K) -
Shintaro Sugai, Jiro Furuichi1955 年 10 巻 12 号 p. 1032-1040
発行日: 1955/12/05
公開日: 2007/06/01
ジャーナル 認証ありIn order to study kinetic exchange reaction and self-diffusion of ions in ion exchangers, the rate of ion exchange was measured by radioactive tracer method similar to that employed by A. Langer and Pitts’ general theory of radioactive ion exchange was applied, with the focus of attention on the rate determining factor of reaction in each case, to analyse the results. When concentrated external solution is utilized, diffusion of cation in cation exchangers and diffusion of anion in anion exchangers was suggested to be the controlling factor, whereas in the case of the use of dilute external solution, the rate of exchange is probably controlled by surface diffusion. In the former case, diffusion coefficients, activation energy of diffusion, and activation entropy of diffusion were calculated, and from the results obtained, the mechanism of diffusion in the exchange resins was discussed.抄録全体を表示PDF形式でダウンロード (984K) -
The Cross-Chain Configuration and a New Type of Phase Transformation in Solid Long Chain Acid AmidesTosio Sakurai1955 年 10 巻 12 号 p. 1040-1048
発行日: 1955/12/05
公開日: 2007/05/29
ジャーナル 認証ありFrom the X-ray investigation on the single crystal of long chain acid amides of even carbon number from C=10 to 18, three phases are found to exist. Phase A in palmitic, myristic, and capric acid amides has the unusual crossed chain configuration similar to that found in potassium soaps. In phase B, found in palmitic and stearic acid amides, and phase C, in stearamide under a special condition, chains are parallel as in the ordinary long chain compounds. All phases seem to be stable at room temperature, but phase A of palmitic amide transforms irreversibly into phase B by heating. But the basal plane is almost unchanged during the transformation.抄録全体を表示PDF形式でダウンロード (2260K) -
Toshiaki Takamatsu1955 年 10 巻 12 号 p. 1049-1054
発行日: 1955/12/05
公開日: 2007/05/29
ジャーナル 認証ありCertain normal long-chain alcohols are well known for their anomalous dielectric properties in higher temperature phase, which are often attributed to molecular rotation in the crystal lattice.
In the present article are described the experiments on the anomalous dielectric dispersion of long-chain normal primary alcohol of probable carbon number 32, extracted from Carnauba wax.
The higher temperature phase (68°–86°C) has quite the same dielectric behaviour which is already known in hexadecyl and octadecyl alcohol. But on the other hand, in lower temperature phase a new dispersion of Debye type was observed. The relaxation time seems to have a certain distribution, and the activation energy estimated from relaxation time versus inverse absolute temperature curve is 26.4 Kcal/mol. The dispersion is considered to be due to the reorientation of O–H group as a result of the restricted rotation or twisting of the molecule.抄録全体を表示PDF形式でダウンロード (624K) -
Masaki Hirashima1955 年 10 巻 12 号 p. 1055-1064
発行日: 1955/12/05
公開日: 2007/05/29
ジャーナル 認証ありA simple method is described for measuring low rates of selective oxidation of Ag–Mg alloys at elevated temperatures when water vapor is used as oxidizing agent. It is found that the MgO layer builds up on the surface of the alloy according to a parabolic law over a range of the water vapor pressure from 7×10−3 to 6×10−2 mm Hg, and the oxide growth begins to follow a linear law rather than a parabolic law at a pressure of 1 mm Hg. In the region where the parabolic law holds, the growth of the oxide layer seems to be controlled by the diffusion of Mg through the layer. 20.7 kcal/mol is obtained as the activation energy of diffusion. Applyjng the transition state theory of gas-metal reaction, as developed by Gulbransen, the diffusion of Mg through the oxide layer is given by D (cm2/sec)=2.17×10−9exp (−20,700/RT).抄録全体を表示PDF形式でダウンロード (1772K) -
Studies on the Explosion Mechanism of Electric Blasting Caps by Ultra-High-Speed Grid Framing CameraTsuneyoshi Uyemura, Teruo Morishige1955 年 10 巻 12 号 p. 1064-1067
発行日: 1955/12/05
公開日: 2007/05/29
ジャーナル 認証ありThe process of explosive fracture of the non-luminous subject has been distinctly photographed by the grid-type ultra-high-speed camera with the use of synchronized flash lighting. A description is given briefly of the equipment used and of some experimental results derived from the resulting photographs.抄録全体を表示PDF形式でダウンロード (592K) -
Oscillographic Studies of Joshi Effect and Secondary Processes in a Low Frequency Electric DischargeB. D. Khosla, N. A. Ramaiah1955 年 10 巻 12 号 p. 1067-1077
発行日: 1955/12/05
公開日: 2007/06/01
ジャーナル 認証ありLow frequency (50 cycles/sec) electric discharge in iodine vapour with glass electrodes was investigated by a cathode ray oscillograph. The rms value of the conductivity was contributed chiefly by two types of pulses, the electron avalanches of which were produced by secondary electrons originating from the cathode and the gas phase. The secondary process concerned with the liberation of electrons from the cathode due to positive ionic bombardment thereon appeared significant for the onset, of the discharge under investigation. The maintenance of the discharge seemed primarily due to photo-ionization of the gas particles in the homogeneous phase. External radiation inhibited the secondary emission from the cathode to give negative Joshi effect, and enhanced that from the gas phase to produce positive Joshi effect; it, however, did not alter the field gradient in the system.抄録全体を表示PDF形式でダウンロード (1588K) -
Yutaka Shigemitsu1955 年 10 巻 12 号 p. 1077-1087
発行日: 1955/12/05
公開日: 2007/06/01
ジャーナル 認証ありAs the second stage of developments of our statistical theory of turbulence, extenston of the initial-period similarity-law is attempted in order to give general explanations to distributions of turbulent quantity across the mean direction of flow, particularly in decaying and nondecaying shear turbulence. In (A), as the statistical hypothesis in our theory, we first give the Gaussian form to P-function. Then, as a simple theoretical result of the above extended similarity law, it can be proved that the distribution of an intermittency factor γ, introduced by A. A.Townsend in his study of turbulent wake, takes the form of Gaussian integral function, which is surveyed further by experimental observations. In (B), by introducing the above result to our fundamental expressions of turbulent intensity, it is interpreted that in all the cases of shear turbulence u⁄\sqrtu2+v2, ‾uv⁄uv and w⁄u have respective nearly constant values in the y-direction. These characters are investigated by experimental measurements. In (C), as the first step to study ‾V*-function in shear turbulent state, the problem of distortion of isotropic turbulence in a contracting stream is taken up. By rather qualitative hydrodynamical discussion on ‾V*-function in the shearless turbulence with a non-uniform mean velocity, our fundamental formula in this case gives a result that v⁄u=‾U(x)⁄‾U0, which is also checked in our measurements. In (D), by using all the results in (A) and (C) we derive theoretically the Reynolds stress distribution across a symmetrical shear turbulence, which is the simplest shear turbulence and corresponds nearly to a free mixing flow. Mean velocity distribution is also determined by the Reynolds equations. They are compared with our experimental measurements.抄録全体を表示PDF形式でダウンロード (1428K) -
Ken-ichi Kusukawa1955 年 10 巻 12 号 p. 1088-1092
発行日: 1955/12/05
公開日: 2007/06/01
ジャーナル 認証ありFor the axisymmetric subsonic now of a compressible fluid we shall develop an analogous procedure to Meksyn-Imai’s method, which was offered for the two-dimensional irratational now of a compressible fluid. And then it will be proved that the final results obtained in the two-dimensional case can also be immediately used in the present three-dimensional case.
Namely, the ratio of the velocity of a compressible fluid past an obstacle to that of an incompressible fluid past the same obstacle, denoted by (q⁄q0), can be given by solving the following algebraic equation of fifth degree:
(q⁄q0)=1+M12(q⁄q0)3\left{1−\fracγ−12M12\ ight}K(α,β)+M14(q⁄q0)5L(α,β),
where M1 and γ are respectively the Mach number of the main flow and the ratio of the specific heats, and K and L are functions determined merely by the form of the obstacle.
Also K and L can be related with the coefficients of the series of the M2-expansion method as follows:
K=Q1⁄q0,
L=(Q2⁄q0)+\fracγ−12(Q1⁄q0)−3(Q1⁄q0)2,
where
q=q0+M12Q1+M14Q2+···.
As an example the flow past a sphere is discussed.抄録全体を表示PDF形式でダウンロード (572K) -
Ken-ichi Kusukawa1955 年 10 巻 12 号 p. 1093-1101
発行日: 1955/12/05
公開日: 2007/06/01
ジャーナル 認証ありWe shall take the cylindrical coordinates o-xy, where x-axis is taken along the axis of revolution and y denotes the distance from the axis. Introducing new variables the fundamental equations for compressible fluid flow in the hodograph space are reduced to a form similar to that for incompressible fluid flow. Thus the flow of an incompressible fluid past a profile P0 corresponds to the flow of a compressible fluid past a profile P, where the coordinates (x, y) and (x0, y0) of the profiles P and P0 are related by the equations:
dx=(Q⁄q)dx0,dy=(Q⁄q)dy0,
and q and Q denote the magnitudes of velocity at corresponding points on the surface of the profiles in compressible and incompressible flows.
Also Q is a function of q defined as follows.
Q=\frac21+μ\left(\frac1+aμ1+a\ ight)1⁄aq(1−a2q2)1−a⁄2a,
μ=(1−q2⁄c2)1⁄2=\left(\frac1−q21−a2q2\ ight)1⁄2,a2=\fracγ−1γ+1,
where c and γ denote respectively the local speed of sound and the ratio of the specific heats.
As examples the velocity distributions on the surface of a sphere and prolate spheroids with thickness ratio t=0.9 and 0.1 are calculated for various Mach numbers, and they are compared with the results obtained by the M2-expansion method, Meksyn-Imai’s method and the linear theory.抄録全体を表示PDF形式でダウンロード (1040K) -
Yoshio Yasuoka1955 年 10 巻 12 号 p. 1102-1109
発行日: 1955/12/05
公開日: 2007/06/01
ジャーナル 認証ありThe characteristic phenomena of the dense space charge of electrons bound by the strong magnetic field are described. The electrons in the outermost sheath of electron cloud are considered to be scattered by mutual interaction and to have excess energies.
Calculation based on this view is in good agreement with experiment.
It is especially noteworthy that when the anode voltage is raised to the proper value, this sheath is captured by the anode and certain unique oscillations are observed to occur. The frequencies of these oscillations very nearly coincide with those obtained from Langmuir’s formula of plasma oscillation.抄録全体を表示PDF形式でダウンロード (904K) -
Yasuo Torikai, Katsuo Negishi1955 年 10 巻 12 号 p. 1110A
発行日: 1955/12/05
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (232K) -
Jun’ichi Okada1955 年 10 巻 12 号 p. 1110B-1111
発行日: 1955/12/05
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (132K)
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