On cylindrically symmetric and static solutions in relativistic gravitation theory
On cylindrically symmetric and static solutions in relativistic gravitation theory
J.E. Pinzon (Colombia)
It is shown that the cylindrically symmetric and static Levi-Civita solution in relativistic gravitation theory (RGT) is nonphysical.
Show AbstractStudy of photoluminescence of cadmium sulfide doped with indium
Study of photoluminescence of cadmium sulfide doped with indium
A.N. Obraztsov, F. Terra
Photoluminescence of cadmium sulfide obtained by condensation from the vapor phase on a glass substrate has been studied. The results obtained support the model of optical excitation recombination in CdS heavily doped with indium. The model is based on the assumption of existence of doubly charged centers related to cadmium vacancies in the lattice of the $V^{2-}_{Cd}$ type.
Show AbstractA method of correcting amplitude and phase errors in the operation of multicomponent acoustic rate meter
A method of correcting amplitude and phase errors in the operation of multicomponent acoustic rate meter
0.A. Kharin, S.V. Kholodova
A method has been suggested of the acoustic rate meter calibration which makes it possible, at the stage of computer processing, to compensate for the amplitude and phase errors due to a mismatch between the microphones. The experimental data are presented that demonstrate the method efficiency.
Show AbstractTwinning of martensite phase crystals
Twinning of martensite phase crystals
A.G. Khundzhua, A.V. Sorokin, E.V. Chernov
Crystallographic features of twinning have been studied in a system of martensite crystals generated from an initial single crystal as a result of phase transformation. It is shown that twinning in alloys with the effect of shape memory leads to a transition from one type of orientational relationship to another, crystallographically equivalent type.
Show AbstractThe structure and magnetoelastic properties of rare-earth Laveis phases of the C15 type
The structure and magnetoelastic properties of rare-earth Laveis phases of the C15 type
G.V. Bondar'kova, A.S. Ilyushin, I.A. Nikanorova
The results of a theoretical calculation of spin-orientation magnetic phase diagrams are presented for some sections of the $(Tb_{1-x}Ho_{x}) _{1-y}Dy_yAl_2$ system, and the temperature and concentration dependences of the energy of magnetocrystal anisotropy are demonstrated.
Show AbstractEffect of pressure on magnetic susceptibility of high-purity single crystals of rare-earth metals
Effect of pressure on magnetic susceptibility of high-purity single crystals of rare-earth metals
S.A. Nikitin, Yu.I. Spichkin, A.M. Tishin, 0.D. Chistyakov
Data obtained from the study of the effect of cubic compression on the magnetic susceptibility in high-purity rare-earth metals are used to determine the temperature shift of magnetic phase transitions upon pressure variation. The variation of indirect exchange integrals was calculated for the rare-earth metals Gd, Tb, Dy, Ho, and Er following a reduction of their atomic valumes.
Show AbstractMicrostructure of sputter-deposited multilayer Ta/Al films with superlattice
Microstructure of sputter-deposited multilayer Ta/Al films with superlattice
A.S. Ilyushin, N.A. Khatanova, Wu Zi-Qin (China), Yuan Xiang-yang (China)
X-ray diffraction and electron microscopy have revealed that in deposition of multilayer Ta/Al films onto glass substrates, the near-substrate layer has an amorphous structure, while subsequent crystalline layers of Ta and Al exhibit a planar axial texture. The films show the presence of a superlattice with a period of 72 A. After annealing at 550°C, the two-layer microstructure transforms to a four-layer one.
Show AbstractEstimating the characteristic lifetime of planetary atmospheres
Estimating the characteristic lifetime of planetary atmospheres
E.V. Pavlova, Yu.P. Pyt'ev
An equation is written for the general case of nonstationary gas motion in a spherically symmetric gravitational field. The equation solution corresponding to the steady-state radial flow in the medium is analyzed. It is shown that the characteristic lifetime of a planetary atmosphere depends exponentially on a parameter equl to the ratio of the product of the gravitational acceleration by the planet radius to the atmospheric temperature.
Show AbstractEstimation of the effect of irregular shifts of the ocean bottom on the mean slope of the ocean surface
Estimation of the effect of irregular shifts of the ocean bottom on the mean slope of the ocean surface
S.V. Makeev, V.I. Pavlov
The mean square of the slope of a wavy ocean surface is known to differ from zero even in the absence of wind. It is shown that practically for the entire water area of the World Ocean this phenomenon can be accounted for by the influence on the ocean surface of persistent irregular seismic shifts of the ocean bottom. Numtrical estimates of the expected effect are presented.
Show AbstractOptimal two-impulse transfers to the libration point $L_2$ of the Sun-Earth system with the use of asymptotic trajectories
Optimal two-impulse transfers to the libration point $L_2$ of the Sun-Earth system with the use of asymptotic trajectories
A.I. Subaev
It is shown that energy expenditures for a transfer from a near-Earth circular artificial satellite orbit to the libration point $L_2$ of the Sun-Earth system can be reduced, if asymptotic trajectories are used.
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