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Volume 27, Issue 1
Displaying 1-50 of 51 articles from this issue
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P. C. Mangal, P. N. Trehan1969 Volume 27 Issue 1 Pages 1-7
Published: July 05, 1969
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSGamma rays in the decay of 144Ce are investigated with scintillation spectrometers using γ-γ coincidence, sum-peak coincidence and γ-γ angular correlation techniques. The high efficiency 3π sum-peak coincidence spectrometer study suggests that the highest excited states in 144Pr and 144Nd are at 166 and 2860 keV respectively. These levels are found to de-excite by 33–133 and 2180–696 keV cascades, respectively. The γ-γ coincidence study confirms the results of the sum-peak coincidence study and also yields the relative intensities some weak gamma rays. The gamma ray spectra in coincidence with the 80 keV gamma ray spectra in coincidence with the 80 keV gamma ray and 35 keV Pr K X-ray give K-conversion coefficients of 53 and 80 keV transitions, respectively. γ-γ directional correlation measurements on the 33–41 and 53–80 keV cascades support spin 2– and 0– for 100 keV level and ground state of 144Pr respectively. The mixing ratio for the 53 keV transition is found to be (99.5±0.2)% M1, (0.5±0.2)% E2.View full abstractDownload PDF (968K) -
S. T. Wu1969 Volume 27 Issue 1 Pages 8-19
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA rigorous formal kinetic theory of macroscopic transport phenomena for N-component gas mixtures with internal degrees of freedom under the condition of non-local-thermodynamic-equilibrium (Non-LTE) is derived. The methods used in this derivation are essentially a combination of those used by Chapman and Enskog for monatomic gases (as extended to multicomponent mixtures by Curtiss and Hirschfelder), and those used by Wang Chang and Uhlenbeck for a single polyatomic gas for the case where the equilibration between internal and translational degrees of freedom proceeds very fast. Also we have incorporated the BGK kinetic model to resolve the problem of Non-LTE. The calculations made correspond to the first approximation in the classical Chapman-Enskog theory. Expressions are derived for the coefficients of shear viscosity, bulk viscosity (due to internal degrees of freedom), ordinary diffusion, thermal diffusion, translational and internal thermal conductivity.View full abstractDownload PDF (1116K) -
Tohru Morita1969 Volume 27 Issue 1 Pages 19-25
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAn argument based on diagram analysis is given to show that various two-position correlation functions of a classical system have the same asymptotic behavior. It is illustrated for the examples of the density-density and energy-energy correlation functions of classical fluids and of the spin-spin and energy-energy correlation functions of the Ising model.View full abstractDownload PDF (900K) -
Motohiko Saitoh, Hidetoshi Fukuyama, Yasutada Uemura, Hiroyuki Shiba1969 Volume 27 Issue 1 Pages 26-38
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSBy using the Green function method for the random lattice, the susceptibility of the impurity band in weak magnetic fields is investigated in a simplified model in which the impurity potential is attractive and of short range and the electron-electron correlation can be negligible. Simple analytical expressions for the susceptibility are obtained and are computed numerically as a function of the concentration of impurities c. When c⁄c0 (c0 is the critical concentration at which the impurity band touches the conduction band) is very small so that the impurity band width is smaller than the binding energy of the impurity potential, the orbital susceptibility in the impurity band region is simply of the type of the atomic diamagnetism, while it is of the type of the ordinary Landau diamagnetism in the conduction band region. The result for the case c⁄c0>>1 explains the observed discrepancy from the existing Landau theory.View full abstractDownload PDF (1544K) -
Tohru Morita1969 Volume 27 Issue 1 Pages 39-43
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA more reasonable consistency condition, than the one adopted by Mamada and Takano, is proposed to determine the distribution of effective field in Ising system. The new condition modifies the equations of Mamada and Takano only slightly, but it gives far better values of the Curie temperature. The critical concentrations of dilute Ising system are found worse.View full abstractDownload PDF (564K) -
Eisuke Hayashi, Masao Shimizu1969 Volume 27 Issue 1 Pages 43-48
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSpin densities induced by an impurity in ferromagnetic nickel are calculated by means of generalized dielectric functions in a single band model of d-electrons and a two band model of d- and conduction-electrons. The calculated induced spin densities at zero wave vector in the two band model agree with the experimental results of the change of the magnetization due to an impurity in dilute Ni–Co and Ni–Fe alloys. Neutron scattering cross sections due to an impurity are calculated from the induced spin densities in the two models and the results are consistent with the experimental results for dilute Ni–Fe alloys.View full abstractDownload PDF (700K) -
Kiyoshi Aoyagi, Kunirô Tsushima, Mitsuo Uesugi1969 Volume 27 Issue 1 Pages 49-56
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe absorption spectrum of a Dy3+ ion in dysprosium aluminum garnet in the paramagnetic state has been investigated in the region of 15,000 to 5,000 cm−1. By observing the Zeeman effect in both pulsed and stationary magnetic fields, the gz-values of the lowest three levels of the 6H15⁄2 ground state split by crystalline-field and of the three levels of the 6F5⁄2 excited state split by crystalline-field have been determined. From the splittings of the absorption lines corresponding to the 6H15⁄2→6F5⁄2 transition in the antiferromagnetic state, the internal fields acting on the Dy3+ ions in the ground and the 6F5⁄2 excited states have been estimated to be 6.2 and 6.8 kOe, respectively.View full abstractDownload PDF (2176K) -
Shûkô Washimiya1969 Volume 27 Issue 1 Pages 56-66
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSCrystal field calculations have been performed on the 6F3⁄2, 6F5⁄2, 6F7⁄2, 6H5⁄2 and 6H15⁄2 states of the Dy3+ ion in the paramagnetic state. The optical absorption spectra for the transition 6H15⁄2→6F5⁄2 have also been studied in detail. The results indicate that the signs of some of the crystal field parameters Vnm based on a point charge calculation have to be changed in order to reproduce the observed level positions and g values of the 6F5⁄2 state. Such change of the crystal field parameters may be ascribed to large shielding of the crystal field potential.
The selection rules derived in the present paper are consistent with the ones obtained in the preceding paper. The theoretical selection rules have been applied successfully to the splittings of the 6F5⁄2 and 6H15⁄2 states below the Néel temperature by using the molecular field approximation. The magnetic-field effect on the absorption lines below the spin-flop field has also been discussed.View full abstractDownload PDF (1140K) -
Michio Kiritani, Takahiro Nishikawa, Sho Yoshida1969 Volume 27 Issue 1 Pages 67-73
Published: July 05, 1969
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSFormation of dislocation loops in aluminum below room temperature down to −90°C is studied by the two step aging method after quenching. The beginning stage of the vacancy clustering is similar to that around room temperature, that is, the small vacancy clusters growing to dislocation loops have a fairly wide range in their size of weak bindings and a well defined nucleus of dislocation loop does not exist. It is concluded that the main part of the beginning stage of the clustering is played by quenched-in di-vacancies, especially at low temperatures. Two kinds of influences of impurity atoms are found. The major influence is to enhance the formation of the loops, but the increase in the stability of vacancy clusters by impurity is not enough to make well defined stable nuclei of dislocation loops.View full abstractDownload PDF (912K) -
Katsumi Shimada1969 Volume 27 Issue 1 Pages 74-80
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe effect of LS coupling is very important in the transport phenomena of heavy metals. We discuss its effect on the residual attenuation of shear waves in the superconducting lead just below the transition temperature. From the results of our calculation, it is found that the effect of LS coupling is particularly important in the case that the wave vector and the polarization vector are parallel to (110) and to (1\bar10), respectively.View full abstractDownload PDF (640K) -
Makoto Hirabayashi, Kenzi Hiraga, Sadae Yamaguchi, Noriko Ino1969 Volume 27 Issue 1 Pages 80-88
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAu–Cd alloys in the range between 25 and 34 at. per cent Cd have been investigated by electron and X-ray diffraction as well as by calorimetry. The existence of a series of close packed structures with periodic stacking modulations and atomic order has been established. The order of appearance of the stacking variants is 4H (ABAC)—6H (ABABAC)—9R (ABCBCACAB)—2H (AB) with increasing Cd contents. The last two of these variants have the modifications with regard to the atomic arrangement on the close packed planes, i.e., the order-disorder transformation takes place with increasing temperature, but the stacking sequence of the close packed planes remains unchanged during the atomic disordering. The ordered arrangement on the close packed planes of the 9R type is identical with that of the one-dimensional long period superstructure with the M=2 type of the Au3Cd alloy. The origin of the stabilization of the stacking variants with or without atomic order is briefly discussed.View full abstractDownload PDF (1876K) -
Kenzo Sato1969 Volume 27 Issue 1 Pages 89-95
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe contribution of thermally agitated free electrons which appeared to the surface of silicon to the optical properties was studied by infrared reflection measurements for heavily doped n-type silicon.
In this measurement, with the increase of temperature up to 300°C, it was found that the reflectivity in wide wavelength region increases almost linearly without modification of the usual reflection profile of the heavily doped material. The experimental results and their consideration by free electron theory and dispersion theory proved that the optical properties of the free electrons which appeared from thermal agitation to the surface of crystal are entirely different from that of free electrons which occurred from dopant of impurities.View full abstractDownload PDF (788K) -
Atsuo Fukuda1969 Volume 27 Issue 1 Pages 96-109
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe C band (1A1g→1Tl1u) of KI:Tl type phosphors has been studied at various temperatures. Its triplet structure (C1, C2, C3) has been confirmed in 24 combinations of impurity ions (Ga+, In+, Tl+, Sn2+, Pb2+) and alkali halide hosts with the NaCl and CsCl type lattices. Since the separation between C2 and C3 is proportional to \sqrtT at high temperatures as exemplified clearly in the case of KI:Ga, KI:Sn and CsBr:In, the structure is concluded to be certainly caused by the dynamical Jahn-Teller effect. Therefore, except its asymmetry which becomes prominent at high temperatures, it is qualitatively understood in terms of Toyozawa, Inoue and Cho’s theory based on the linear interaction. Importance of quadratic interactions is discussed in connection with the asymmetry; the difference in force constants between the 1T1u and 1A1g energy surfaces causes the asymmetry. Lastly, Kristoffel’s theory for the structure is criticized; the breakdown of the Condon approximation is not essential for the appearance of the structure observed.View full abstractDownload PDF (1704K) -
Hiroshi Kanzaki, Shiro Sakuragi1969 Volume 27 Issue 1 Pages 109-125
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSVarious correlations are observed between absorption and luminescence spectra of silver halides with isoelectronic impurities at low temperature. In Part I, the bound exciton transitions are described mainly on AgBr:I− together with related cases of AgCl:Br− and AgCl:I−. In AgBr:I−, mirror-image like relations are observed between absorption and emission spectra with zero phonon line at the center. Multiphonon structures are observed in both spectra and the energy of coupled phonon is substantially smaller in absorption that in emission. The difference in phonon energies reflects strong binding of excitons with phonons discussed by Toyozawa and Hermanson. In absorption spectra, additional structures are observed and interpreted as creating excitons in higher excited states. In emission, one phonon sidebands are observed reflecting phonon spectrum in pure AgBr. Discussions are also made on temperature variation of absorption spectrum and on asymmetric intensity distribution between absorption and emission spectra.View full abstractDownload PDF (2552K) -
Hiroshi Saito, Setsuko Saito, Ryumyo Onaka1969 Volume 27 Issue 1 Pages 126-130
Published: July 05, 1969
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSAbsorption bands of RbCl–KCl mixed crystals are studied in XUV region at room temperature, with particular attention to the behavior of the sharp multiplet bands characteristic of the cations. Position of the multiplets hardly depends upon the composition of the mixture and therefore the previous assignment of the multiplets to the exciton absorptions related with the quasi-intraionic transitions is confirmed. From the separation between the components of the multiplet of RbCl, the energy difference between the band bottoms at Γ and X points in the conduction band and also the spin-orbit separation of the uppermost cation core band are determined.View full abstractDownload PDF (660K) -
Ei-ichi Furubayashi1969 Volume 27 Issue 1 Pages 130-146
Published: July 05, 1969
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSBehavior of individual dislocations is investigated by stretching the foil single crystals of Fe-3% Si inside a 500 kV electron microscope. Formation of dislocation dipole trails and loops are continuously observed under the microscope, and is attributed to jogs caused by cross glide. Slip traces of individual dislocations are wavy even in the electron microscopic scale, but are nearly parallel to a low index plane. Dislocation activity is larger when the dislocation is moving in the outer part of a slip band, where the dislocations are less joggy. Evidences on mode of dislocation multiplication and interaction are obtained.
Drag stress by jogs as well as long range force between dislocations amounts only to a small fraction of the flow stress. Peierls mechanism can be used to explain consistently the elongated screw dislocations, the single ended dislocation sources and the large frictional stresses observed in this material.View full abstractDownload PDF (7596K) -
Takuyuki Uragami1969 Volume 27 Issue 1 Pages 147-154
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe dynamical theory of electron and X-rays for a deformed crystal reported by Takagi is applied to the Bragg case. The transmitted and diffracted waves are represented by the same integral forms as in the Laue case. The integrals are calculated in the case where the crystal is perfect and the waves in the crystal and those emerging from the entrance surface are analytically obtained. The results show that the Pendellösung fringes and the margin effect exist in the Bragg case and the intensity of the wave emerging from the entrance surface oscillates with the distance from the incident point. The observations of the X-rays in (440) reflection from a single crystal of silicon support the results expected by the present theory.View full abstractDownload PDF (1044K) -
Sadae Yamaguchi1969 Volume 27 Issue 1 Pages 155-163
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe crystal structure of the interstitial solid solution of alpha titanium-oxygen system has been investigated by a combined method of electron, neutron and X-ray diffraction as functions of composition and annealing temperature. The existence of two-types of interstitial superstructure has been established over nearly the whole composition range below the critical temperature. One of them designated as α′ has a layer-ordered structure of the anti-Cd(OH)2 type (space group P\bar3m1) involving out-of-steps with regard to oxygen distribution. The other is a low-temperature form α″ which has a trigonal symmetry (space group P\bar31c) with the cell dimension of a=\sqrt3a0 and c=2c0 (a0 and c0 are the lattice constants of the original h.c.p. cell). The oxygen distribution in this phase is generally specified in terms of composition dependent parameters of occupation probabilities for the three octahedral interstitial sites 2(a), 2(c) and 2(d). The structure of α″ at a special composition of TiO0.33 coincides with the model proposed by Holmberg.View full abstractDownload PDF (1744K) -
Osamu Aita, Takasi Sagawa1969 Volume 27 Issue 1 Pages 164-175
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA grazing incidence spectrometer with a concave grating of 2 m radius operating in the wavelength region from 20 Å to 1,000 Å has been constructed in order to study the electronic structure of solids. With this spectrometer, the lithium K, beryllium K, boron K, aluminum L2,3 and silicon L2,3 emission spectra have been measured under the condition of ultra-high vacuum and low target input. The results are considered to give the intrinsic spectral profile nearly free from influence of oxidation and contamination of the specimen. They are compared with the theoretical density-of-state curves. Some of the discontinuities in the beryllium K and aluminum L2,3 emission spectra are attributed to the Van Hove singularities in the valence band.View full abstractDownload PDF (1672K) -
R. J. Fleming1969 Volume 27 Issue 1 Pages 175-177
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA recent calculation by Koyama has been repeated, introducing a more exact method of averaging over the internal configurations of polymer chains of specified radius of gyration. The results differ significantly from those of Koyama only in the variation of mean axial ratio of the equivalent ellipsoids with reduced radius of gyration.View full abstractDownload PDF (224K) -
Itiro Omura, Tadao Kaneko, Yahiko Yamada, Kenichiro Tanaka1969 Volume 27 Issue 1 Pages 178-181
Published: July 05, 1969
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSPhotoionization efficiency curves for the parent ions of C2H2 and C3H4 have been measured with a photon bandwidth of 1.3 Å. For the C2H2+ ion, the minimum onset for ionization of C2H2 occured at 1088 Å (11.395±0.015 eV). Vibrational structure and autoionization were observed above the threshold region. For the C3H4+ ion, the minimum onset occured at 1198 Å (10.349±0.015 eV), and the second ionization for the C3H4+ ion was observed at 1103 Å (11.24 eV). Above the threshold there were observed several vibrational structure and autoionization.View full abstractDownload PDF (512K) -
Akimasa Funahashi, Susumu Takeda1969 Volume 27 Issue 1 Pages 182-186
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMeasurements are carried out of electron densities and temperatures in a plasma produced behind an electromagnetically driven, reflected shock wave in a T-tube filled with hydrogen at an initial pressure of 1.0 Torr. The ranges of the measured electron densities and temperatures are respectively from 1017 to 1015 cm−3 and from 2.5×104 to 104°K. The electron densities are determined by the 35-GHz microwave reflection technique. These measured values are in good agreement with those determined from Stark broadening of the Hβ line. The electron temperatures are determined from the ratio of the total spectral line to continuum intensity, and from the measured collision frequency and electron density. The observed plasma decay is interpreted in terms of the collisional-radiative electron-ion recombination theoretically calculated by Bates, Kingston and McWhirter, who take account of the effect of the ionization.View full abstractDownload PDF (672K) -
Toshitaka Idehara, Kunizo Ohkubo, Shigetoshi Tanaka1969 Volume 27 Issue 1 Pages 187-197
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWhen a weak electron beam is injected into a plasma in a thermal equilibrium, there appear the instabilities, which result in the excitation of the following waves; (i) the electrostatic cyclotron harmonic waves (CHW), (ii) the upper hybrid resonance wave, (iii) the fine structure near the cyclotron harmonic frequencies, (iv) the harmonic waves of half the cyclotron frequency and (v) the quasi-longitudinal (QL) waves in a low frequency range. The intensity of the microwave emission resulting from these instabilities is very strong and is larger by several tens dB than that emitted from the plasma in the absence of the electron beam.
The excitation of CHW is ascribed to the interaction of CHW in plasma with those in the electron beam. The fine structure is due to the standing waves of CHW confined in the plasma column. The instability in the lf range is ascribed to a coupling of the QL waves in the plasma with the space charge waves in the beam.View full abstractDownload PDF (1416K) -
Susumu Shioda1969 Volume 27 Issue 1 Pages 197-202
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAmbipolar diffusion between parallel cold walls in the weakly ionized gas which flows in the direction parallel to walls is investigated theoretically. The whole region is divided into three ones: the linear, non-linear and sheath regions where the linear diffusion equations, the continuum equations contaning inertia terms and the collisionless equations are used respectively. Solutions are patched and the Bohm’s criterion is used to match the nonlinear and sheath regions.
The thickness of the non-linear region is O(α1⁄4). The density of electrons and ions decreases to a fraction of O(α1⁄2) at the sheath edge. And the potential drop between the center and the walls is (Remark: Graphics omitted.). (α∼li2⁄L2,li is the mean free path of ions and 2L is the distance between walls).View full abstractDownload PDF (524K) -
Tadatsugu Hatori1969 Volume 27 Issue 1 Pages 203-218
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSUnder the assumption that the system is spatially uniform and the constituent particles interact only with scalar potential, the most general kinetic equation is derived based upon the Klimontovich formalism. Both the turbulent fluctuations and the fluctuations due to the discreteness of matter are taken into account. The obtained equation reduces to the ordinary equation applicable to the system nearly in the equilibrium and also to the equation describing the Vlasov turbulence. The terminology “renormalized” means that partial summation of the perturbational expansion is performed in the derivation process.View full abstractDownload PDF (1370K) -
S. C. Agrawal, G. S. Agrawal1969 Volume 27 Issue 1 Pages 218-223
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe present paper investigates the stability of nondissipative, heterogeneous shear flow in the presence of a uniform magnetic field applied in the streaming direction. The main results established in the paper are the following:
(i) The waves propagating along the streaming direction are the most unstable ones and hence the two-dimensional analysis is made throughout. (ii) The complex wave velocity of an arbitrary unstable mode must lie within a semi-circle in the upper half plane whose radius is less than the radius of Howard’s semi-circle. (iii) If the magnetic force number exceeds certain quantity which depends only upon the streaming velocity, the system is completely stabilized. Further the analysis has also been carried for the case when the applied magnetic field is weak.View full abstractDownload PDF (684K) -
Akira Yokoyama1969 Volume 27 Issue 1 Pages 224-229
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMethod of operators is utilized effectively to simplify the rigorous integral expression for the Hertz vector, as well as the relation between Hermite polynomials and their integral expressions under the condition that kR>>1, where R is the distance from the dipole to the point of observation, and k is the wave number for the air. The obtained formulas for the Hertz vector of the radiation field hold without restrictions on the earth’s refractive index and heights of the dipole or the point of observation, except the assumption that kR>>1, for all its simplicity.View full abstractDownload PDF (684K) -
Ryuji Takaki1969 Volume 27 Issue 1 Pages 229-234
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe diffusion of turbulence in a fluid at rest is studied. First, a simplified one-dimensional model is proposed and solved exactly. The change of the intensity and the length scale of turbulence with depth is calculated. Next, the equation of the energy spectrum function is derived and solved using two hypotheses: one expresses the non-linear interaction in terms of the eddy viscosity and the other describes the diffusion of turbulence using the notion of the eddy diffusivity. The energy spectrum function, the intensity of turbulence and the eddy diffusivity are calculated numerically.View full abstractDownload PDF (536K) -
A. Apelblat1969 Volume 27 Issue 1 Pages 235-239
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe boundary layer equations for the magnetohydrodynamic version of the Falkner-Skan problem are solved with the use of the Laplace transform and the steepest descent technique. For the boundary layer flow of an electrically conducting fluid, past a semi-infinite flat plate, the viscous stress at the plate disappears when the adverse magnetodynamic pressure gradient is close to 1/11 U∞2(1−S)x−13⁄11. The quantity S gives the ratio of the magnetic to kinetic energy and U∞ is the uniform velocity at the main flow. The possibility to extend the Laplace transform method to the evaluation of infinite integrals connected with the boundary condition at infinity is also demonstrated.View full abstractDownload PDF (492K) -
S. K. Agrawal, R. P. Gupta, N. S. Bhatnagar1969 Volume 27 Issue 1 Pages 239-243
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMembrane creep of circular plates of rotationally symmetric anisotropic materials has been studied on the basis of Norton’s law. The fundamental constitutive equations have been derived from the equations for the orthotropic theory of creep given by Bhatnagar and Gupta. These have been solved using a method of solution in series. It is found that both the stress and displacement components change with time and for vanishing anisotropy reduce to the same expressions which were previously obtained by Odqvist for isotropic case. The effect of anisotropy is discussed graphically.View full abstractDownload PDF (368K) -
Shoichi Wakiya, Katutoshi Obara1969 Volume 27 Issue 1 Pages 244-252
Published: July 05, 1969
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe technique presented by Dean is applied to find the solution for a slow two-dimensional steady motion of liquid in an infinite channel. The channel is composed of two parallel infinite plates and a semi-infinite partition plate which is in the middle of the infinite plates. The fluid velosity is assumed to have a parabolic distribution at infinity and the direction perpendicular to the edge line of the partition plate. The stream function is first assumed and two sets of constants contained in it are then adjusted so that slip of the velosity on the boundaries becomes sufficiently small. From the approximate solution obtained, the properties of the solution in the neighbourhood of the leading edge of the partition plate and the pressure drop along the channel due to the partition are discussed.View full abstractDownload PDF (812K) -
Masako Kajiura, Kiyoshi Aoyagi, Satoru Sugano1969 Volume 27 Issue 1 Pages 253
Published: July 05, 1969
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Narsingh Dass, S. K. Mitra1969 Volume 27 Issue 1 Pages 254
Published: July 05, 1969
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Kenji Shimomura, Teruo Kodama, Hisao Negita1969 Volume 27 Issue 1 Pages 255
Published: July 05, 1969
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Tadashi Miyashita, Hiromitsu Kondo, Syôhei Miyahara1969 Volume 27 Issue 1 Pages 256
Published: July 05, 1969
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Yoshihira Aoki, Takurô Nakamichi, Mikio Yamamoto1969 Volume 27 Issue 1 Pages 257
Published: July 05, 1969
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Yoshihira Aoki1969 Volume 27 Issue 1 Pages 258
Published: July 05, 1969
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Michiko Terada, Makoto Sakata, Hiroshi Nosé1969 Volume 27 Issue 1 Pages 259
Published: July 05, 1969
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Yasuharu Makita, Minoru Sumita1969 Volume 27 Issue 1 Pages 260
Published: July 05, 1969
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Koichi Toyoda, Kenji Ishikawa, Hiroshi Kameyama1969 Volume 27 Issue 1 Pages 261
Published: July 05, 1969
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Shoichiro Nomura, Takashi Takahashi, Yuji Yokomizo1969 Volume 27 Issue 1 Pages 262
Published: July 05, 1969
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Takao Nasu, Yoshihiro Asano1969 Volume 27 Issue 1 Pages 263
Published: July 05, 1969
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Takao Nasu, Yoshihiro Asano1969 Volume 27 Issue 1 Pages 264
Published: July 05, 1969
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Hiroshi Harada, Tatsuo Yamada, Yoshio Inuishi1969 Volume 27 Issue 1 Pages 265
Published: July 05, 1969
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Takeo Miyata1969 Volume 27 Issue 1 Pages 266
Published: July 05, 1969
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Atsushi Okazaki, Noboru Tsukuda1969 Volume 27 Issue 1 Pages 267
Published: July 05, 1969
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Setsuo Kajiwara1969 Volume 27 Issue 1 Pages 268
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Seinosuke Onari1969 Volume 27 Issue 1 Pages 269
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Yukio Okamoto, Hajime Tamagawa1969 Volume 27 Issue 1 Pages 270
Published: July 05, 1969
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Masatada Ogasawara1969 Volume 27 Issue 1 Pages 271
Published: July 05, 1969
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