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Volume 12, Issue 10
Displaying 1-24 of 24 articles from this issue
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Shigeo Takemoto, Tsunekichi Dazai, Shinji Suganomata1957 Volume 12 Issue 10 Pages 1057-1060
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe angular distributions of five proton groups from the Si28 (d, p) Si29 reaction have been measured in energy range 0.77- to 1.30-Mev. In our energy region complicated compound nucleus effect was observed.View full abstractDownload PDF (360K) -
Tohru Morita1957 Volume 12 Issue 10 Pages 1060-1063
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe formulation of the cluster variation method of approximation for cooperative phenomena is generalized to the cases where the quantum statistics is to be taken into account. In this generalization, the nature of approximation becomes more obscure, but the quantum counterparts of the various approximations introduced in classical statistics are easily found.
The method in its lowest approximation—the point approximation—is applied to the lattice model of liquid helium proposed by Matsubara and Matsuda and found to lead to the same results as they obtained under the consideration of the analogy to an anisotropic spin system.View full abstractDownload PDF (348K) -
Tsutomu Ishimura, Toshio Shiraiwa, Masao Sawada1957 Volume 12 Issue 10 Pages 1064-1070
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe permissible maximum input power of the cylindrical anode of a continuous operating X-ray tube was calculated. Calculation was done for the cyclic dynamical steady state which was realized after sufficiently long continuous operation. This thermal problem was treated by DuMond as a one-dimensional problem in which heat flow was normal to the surface of the target. In our case a focus of an electron beam was a line focus and the width was small compared with the thickness of the target and the problem was treated as a two-dimensional problem containing transversal thermal flow.View full abstractDownload PDF (764K) -
Eizo Otsuka, Hazimu Kawamura1957 Volume 12 Issue 10 Pages 1071-1082
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSStudies of quadrupolar effects of mixed alkali halide on nuclear resonance previously reported for Na in NaCl–NaBr have been extended to Br in KBr–NaBr. Amplification factor for eQq is thus derived and making use of this factor densities of dislocation are determined for a series of plastically deformed crystals of KBr. Although the effects of the screw and edge dislocations are additive for the broadening of the spectral line, their contributions to the net shift of the center of gravity of the line are in the opposite directions for H0⁄⁄[100]. Hence the two kinds of dislocation are separable in density through the measurement of the breadth and asymmetry of the spectral line. Extrapolation to zero strain shows that for an undeformed crystal screw and edge dislocations are nearly balanced in number and their total density lies around 4×108 cm−2. Linear Compression more favors the production of screw dislocations than that of edge dislocations and the density of each type dislocation increases quite linearly with strain up to fourty percent deformation. For the heaviest deformed sample the total dislocation density achieved was about 3×109 cm−2.View full abstractDownload PDF (1720K) -
Yoshikazu Ishikawa, Syun-iti Akimoto1957 Volume 12 Issue 10 Pages 1083-1098
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetic properties of the synthesized solid solution x FeTiO3·(1−x) Fe2O3 of ilmenite (FeTiO3) and hematite (Fe2O3) were investigated in detail for the whole range of 0≤x≤1. On the experimental side of the study, the most suitable method for preparing the specimen with the largest intensity of magnetization was found. Changes of the Curie point, the estimated intensity of magnetization at 0°K, the Curie constant and the asymptotic paramagnetic Curie point with the composition were presented. It was found that the magnetic properties of the solid solution, x FeTiO3·(1−x)Fe2O3, could be divided into three parts, (i) x=1, (ii) 1>x\gtrsim0.5 and (iii) 0.5>x≥0: Pure ilmenite (FeTiO3) is antiferromagnetic below 55°K and the specimens for 1>x\gtrsim0.5 are very strongly ferromagnetic and for 0.5>x≥0 they are again antiferromagnetics on which feeble parasitic ferromagnetism is superimposed.
On the theoretical side of the study, these magnetic properties were discussed by using the approximation of molecular field. It was shown that we could explain an outline of the magnetic properties of the solid solution if we assume that the tetravalent Ti ions always occupy one of the two sublattices in the specimens for 1≥x\gtrsim0.5, while such an ordering of Ti ions and Fe ions is disturbed for 0.5>x≥0.View full abstractDownload PDF (2076K) -
III. Angular Momentum Distribution of OH* Radicals Liberated from Alcohol MoleculesTadao Horie, Masamoto Otsuka, Takayuki Nagura1957 Volume 12 Issue 10 Pages 1099-1104
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe light induced when a homogeneous electron beam (500–700 eV) intersects normally a localized jet of methyl, ethyl, or n-propyl alcohol vapor in a vacuum of 10−4 mmHg has been found to be almost entirely due to the emissions from the fragments H*, CH* and, OH*. The angular momentum distributions of the OH* radicals split from alcohol molecules of the respective species have been measured by the molecular spectrophotometric method. They all differ notably from that previously found for OH* from H2O, that is, the first maximum appears near the rotational quantum number 7 and the second maximum is entirely absent except for OH* from CH3OH. Qualitative discussions are also given to the multiple fragmentation by electron impact of these alcohol molecules.View full abstractDownload PDF (1540K) -
Shizuko Ogawa1957 Volume 12 Issue 10 Pages 1105-1110
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSMeasurements of nuclear quadrupole resonances of antimony isotopes in solids have been made at a relative accuracy of about one part in 106. Detectors are superregenerative oscillators. Relative accuracy was achieved by measurement of two or three resonance frequencies in a very short time. For antimony trichloride the results were almost in agreement with Wang’s data, but the resonant frequency ν3 of the Sb123 isotope, was higher about 2.5 kc. This implies that the cedecipole coupling constant might not have an order of magnitude which leads to a definitely measurable amount. In antimony oxide the simultaneous measurement was more easy, since it has a small asymmetry parameter. In this case, the deviation of resonance frequencies from a multiple relation is very small. These results are discussed in terms of cedecipole interaction and thermal vibration.View full abstractDownload PDF (640K) -
Masao Sumi1957 Volume 12 Issue 10 Pages 1110-1117
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe collective behavior of density fluctuations in a purely electronic cloud which is not neutralized by positive ions is analysed under the influence of external electromagnetic fields. In an equilibrium state the electrostatic space charge force is counter-balanced by the external fields and it gives rise to the mean drift flow of electronic cloud accompanying with the oscillations similar to those in the usual plasma. The classical description lead to the dispersion relation, which involves additional terms due to the drift velocity of electron flow. The effect of this drift velocity on the frequency shift is briefly discussed.View full abstractDownload PDF (744K) -
Hirosi Hasunuma, Jiro Nara1957 Volume 12 Issue 10 Pages 1117-1122
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe scattered light from Cr-plated aventurine surfaces were measured by a goniophotometer. The results were analysed assuming that the surfaces are covered by randomly distributed small facets and the scattered light consists of ones reflected regularly by the facets. It is concluded that the inclinations of the facets are distributed by Gaussian process, the r.m.s. values of them lying between 4° to 10°. The results were compared with the theoretical one calculated by the equi-inclination model.View full abstractDownload PDF (580K) -
Minoru Nait\={o}1957 Volume 12 Issue 10 Pages 1122-1129
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSPractical formulae in terms of elliptic integrals have been obtained which are useful for calculating the solid angle subtended by a circular aperture at a point which is not on the axis of the aperture. Like the familiar formulae in terms of zonal harmonics, these formulae can be used not only to calculate the solid angle with an accuracy of 4 significant figures, but are also applicable to cases in which the former formulae cannot be employed owing to their slow rate of convergence. The results of some preliminary calculations are shown in tables.View full abstractDownload PDF (664K) -
Sh\={o}ichi Wakiya1957 Volume 12 Issue 10 Pages 1130-1141
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA solution of the Stokes equations of motion of a viscous fluid is given in a form suitable for dealing with the flows past an ellipsoid. When the ellipsoid has rotational symmetry, the solution is expressed in infinite triple integrals.
By utilizing these results, two kinds of steady flows of a viscous fluid past a spheroid are studied when the direction of the main stream is parallel to the axis of symmetry of the spheroid. The first is the flow past a spheroid between two parallel plane walls and the second is the flow past a spheroid in a cylindrical pipe with its axis of revolution along the axis of the pipe.
In particular, the drag and the moment acting on the spheroid as well as the pressure drop in the pipe are discussed in detail. It is worth noticing that the moment of force acting on a spheroid moving uniformly between two parallel walls changes its sign when the rate of roundness of the spheroid exceeds a certain definite value.View full abstractDownload PDF (892K) -
Nobuyoshi Morita1957 Volume 12 Issue 10 Pages 1142-1148
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSStructure of magnesium fluoride films of thickness from 40 Å to 8000 Å evaporated on optical glass and on fused quartz was studied by means of electron microscope and diffraction and its correlation with optical properties and tenacity of the films was examined. Films deposited at room temperature are amorphous, and the grains remain considerably small and tend to grow in height. Effects of residual gas, contamination of substrate surface and rate of deposition were examined. Films deposited in poor vacuum are shown to be porous in structure. Films deposited on substrate kept above 220°C have [301] preferred orientation, and the grains remain thin and grow along the substrate surface. The causes of tenacity of the films deposited at high substrate temperatures are discussed.View full abstractDownload PDF (1984K) -
Misazo Yamamoto1957 Volume 12 Issue 10 Pages 1148-1158
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSViscosity behaviors of concentrated polymer solution are treated by making use of the model of weak Gaussian network. If chain-breakage coefficient, i.e. the probability of breakage of a chain in the network is independent of elongation of the chain, such system shows the Newtonian flow. Proper choice of chain-breakage coefficient, for example, that of square well type, yields a typical rate dependence of viscosity; the larger the rate of shearing flow, λ, the smaller the value of viscosity coefficient, μ. The tensile viscosity, μ*, is also considered, which in general increases with the rate of stretching, λ*, for small values of the rate. The so-called Trouton’s formula, μ*=3μ is satisfied only in the limit of zero values of rates λ and λ*.View full abstractDownload PDF (988K) -
Eiichi Fukada, Iwao Yasuda1957 Volume 12 Issue 10 Pages 1158-1162
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe piezoelectric effect of bone has been observed similarly to the case of wood or ramie. The specimens were cut out from the femur of man and ox, and dried completely by heating. The piezoelectric constants were measured by three different experiments, that is, measurements of the static direct effect, the dynamic direct effect and the dynamic converse effect. The piezoelectric effect appears only when the shearing force is applied to the collagen fibres to make them slip past erch other. The magnitude of piezoelectric constant depends on the angle between the applied pressure and the axis of the bone. The maximum value of piezoelectric constant amounts to 6×10−9 c.g.s. e.s.u., which is about one-tenth of a piezoelectric constant d11 of quarts crystal. The specimens which were boiled in hot water and afterwards dried completely showed little change in the piezoelectric effect, the fact ascertaining that the effect is not of biological origin. The origin to piezoelectricity in bone may be ascribed to the piezoelectric effect of the crystalline micelle of collagen molecules. The consideration of the symmetry of the configulation of collagen fibres in the bone texture shows the existence of effects which are represented by only two piezoelectric constants d14 and d25, which are the same in magnitude but opposite in sign.View full abstractDownload PDF (596K) -
Tadaichi Yabumoto, Syôzi Yamada1957 Volume 12 Issue 10 Pages 1163
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (140K) -
Kisaburo Shogenji, Susumu Uchiyama1957 Volume 12 Issue 10 Pages 1164
Published: October 05, 1957
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (128K) -
Yoshikazu Ishikawa1957 Volume 12 Issue 10 Pages 1165
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (160K) -
Shigeo Hagiwara, Kiyoe Kato, Yoshihito Abe, Midori Minematsu1957 Volume 12 Issue 10 Pages 1166
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (140K) -
Mikio Takeyama1957 Volume 12 Issue 10 Pages 1167-1168
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (128K) -
Muneyuki Date1957 Volume 12 Issue 10 Pages 1168
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (120K) -
Yasuo Kanai, Wataru Sasaki1957 Volume 12 Issue 10 Pages 1169
Published: October 05, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (132K) -
Yukito Tanabe1957 Volume 12 Issue 10 Pages 1170A
Published: October 15, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSP. 974 right column
line 4 N should be read Ne.
line 25 U or ∇Ve should be read ∇U or ∇Ve.View full abstractDownload PDF (16K) -
Toshio Misawa1957 Volume 12 Issue 10 Pages 1170B
Published: October 15, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSP. 884 right column, line 4; \barIexp(iωt) should be read \ ildeIexp(iωt).
P. 884 left column; Eq. (16)
δ\ ilde\varphi=−∫0xb\fracd\ ilde\varphindxdxn
should be read
δ\ ilde\varphin=−∫0xb\fracd\ ilde\varphindxdx.
In Eq. (18), δ\varphi should be read δ\varphin.
P. 885 right column; in Eq. (29) τp should be read τn.
P. 886 right column; line 37; d\varphiu should be read d\varphin.
P. 887 right column; in Eqs. (45) and (46) μn should be read μp.View full abstractDownload PDF (24K) -
Wataru Segawa1957 Volume 12 Issue 10 Pages 1170C
Published: October 15, 1957
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe notations εxx,···εyz,··· must be ammended as ε′,xx···ε′yz···, respectively, except in § 3.
p. 997, left column, line 11, “According to the Neo-Hookian Theory” must be eliminated.
p. 997, right column, line 6, “but finite” must be eliminated.
p. 997, right column, line 8, “finite strains” must be amended as “ε′xx,···ε′yz···”.View full abstractDownload PDF (24K)
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