Atmospheric ozone and monsoon circulation of the atmosphere
Atmospheric ozone and monsoon circulation of the atmosphere
A.Kh. Khrgian, Nguen Van Thang
It is shown that in the flow of the Indonesian-Australian winter monsoon the layer of atmospheric ozone exhibits a strong upwelling and becomes thinner, while the total amount of ozone in it decreases (by 10% on the average) sometimes to record values of less than 200 D.U. This creates the danger of exposing the Earth's biosphere, including the population of south-east Asia, to high dozes of ultraviolet radiation.
Show AbstractChanges of dissipative properties of CdS single crystals exposed to ultrasound
Changes of dissipative properties of CdS single crystals exposed to ultrasound
G.V. Bushueva, G.M. Zinenkova, V.I. Reshetov, M.I. Silis
Dissipative properties of CdS single crystals during ultrasonic treatment were investigated using the method of two-component piezoelectric oscillator. The experiments were conducted at frequeancies of the order of 100 kHz, with relative deformation amplitudes up to $5 \times 10^{~4}$. Exposure to ultrasound is shown to produce changes in the dissipative properties, strength characteristics, and the dislocation structure of CdS crystals.
Show AbstractCurrent-voltage characteristics and dynamics of breakdown development in Bi-Sb semiconductor alloys upon uniaxial compression
Current-voltage characteristics and dynamics of breakdown development in Bi-Sb semiconductor alloys upon uniaxial compression
E.V. Bogdanov, D.L. Shishkin
The effect of uniaxial compression along the binary and bisector axes (up to deformations of -0.2%) on the current-voltage characteristics, the dynamics of breakdown development, and the lifetime of nonequilibrium charge carriers was experimentally studied for multivalleу n- and p-type $Bi_{1-x}Sb_x$ semiconductor alloys (0.10 $\leq x \leq$ 0.167) at a temperature of 4.2 K. As a whole, the results can be qualitatively explained on the basis of the available data on compression-induced variation of the energy spectra of these materials.
Show AbstractEffect of intrasublattice frustration on magnetic properties of a two-sublattice system
Effect of intrasublattice frustration on magnetic properties of a two-sublattice system
Mai Suan Li
It has been shown that intrasublattice frustration in a system with two increases equivalent sublattices substantially increase the temperature of transition to a nonergodic state and strengthens the de Almeida-Thouless magnetic field. The dependence of the Edwards-Anderson parameters on the frustration degree has been obtained. The intrasublattice frustration has been found to suppress the sublattice susceptibility.
Show AbstractDispersion of waves from an instantaneous point source on a flotation liquid surface
Dispersion of waves from an instantaneous point source on a flotation liquid surface
M.B. Tverskoi
The paper is devoted to studying qualitative and quantitative aspects of the flotation effect on dispersion characteristics of waves generated by an instantaneous point source on a liquid surface.
Show AbstractDistinctive features of fermion motion in the Aharonov-Bohm gauge field
Distinctive features of fermion motion in the Aharonov-Bohm gauge field
D.V. Gal'tsov, S.A. Voropaev, D.A. Spasov
A self-adjoint extension of Dirac's Hamiltonian is constructed for fermion motion in the Aharonov-Bohm gauge Held. The problem of bound states is considered and expressions for particle energy levels are obtained.
Show AbstractNew harmonic coordinates for Schwarzschild's geometry
New harmonic coordinates for Schwarzschild's geometry
A.N. Petrov
New harmonic coordinates for Schwarzschild's geometry are found and the corresponding metric is investigated. In contrast to the case of application of Fock's harmonic coordinates, in the new coordinates, particles falling into a black hole attain the event horizon at a finite value of time parameter.
Show AbstractGeometrical optics approximation and the modified traveling wave method
Geometrical optics approximation and the modified traveling wave method
V.D. Gusev, S.M. Golynskii
The paper is devoted to specification of the limits of applicability of the geometrical approach (the quasi-classical WKB method) in describing statistical characteristics of electromagnetic radiation propagating in a planar-layered randomly inhomogeneous medium. It is shown that the geometrical optics method is the limiting case of the modified traveling wave method. Based on the comparison of solutions obtained by these methods for the one-dimensional problem, conditions determining the range of applicability of the geometrical optics approximation are derived.
Show AbstractThe possibility of using CCD-matrix in photographic zenith tube observations
The possibility of using CCD-matrix in photographic zenith tube observations
V.A. Krainov
A certain modification of the algorithm of star observations with the photographic zenith tube makes it possible to use a CCD-matrix in the focal plane. The proposed algorithm minimizes the requirements to the equipment employed for the star image processing and data input into the computer.
Show AbstractSpecific features of structural and magnetic phase transitions on crystallization of $Fe_{78}Si_{9}B_{11}C_{2}$ amorphous alloy
Specific features of structural and magnetic phase transitions on crystallization of $Fe_{78}Si_{9}B_{11}C_{2}$ amorphous alloy
N.A. Khatanova, V.N. Prudnikov, F. Martines
The temperature dependence of the saturation magnetization of amorphous foils of the $Fe_{78}Si_{9}B_{11}C_{2}$ alloy heated up to 900° С was studied. The magnetic phase transition in the amorphous phase was shown to fail due to crystallization of the $\alpha –Fe$, $(Fe, Si)_2(B, С)$, $\gamma – Fe$, and $(Fe, B, C)_3Si$ phases which began at 450°С.
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