Statistics of rays in a plane-layered isotropic medium with isomeric inhomogeneities
Statistics of rays in a plane-layered isotropic medium with isomeric inhomogeneities
V.D. Gusev and S.M. Golynskii
The statistics of rays in a plane-layered isotropic medium with isomeric inhomogeneities are described in the Markov approximation. A solution of the Einstein-Pokker equation is obtained in the small-angle approximation in the form of a series in Hermite polynomials. Estimates are obtained for a model of a linear layer, when one can use a normal distribution law of the angular fluctuations as a solution of the problem. The frequency dependence of the angular fluctuations of the wave at the exit from linear and parabolic layers is analyzed for two models of the high-level behavior of the electron density fluctuations of the medium.
Show AbstractA theoretical picture of the flow over north ural taking the stable atmosphere into account
A theoretical picture of the flow over north ural taking the stable atmosphere into account
N.N. Zidlev
The properties of orographic disturbances for flow over the extended Ural range taking into account the effect of a stable stratosphere are considered by solving the equation of the nonlinear two-dimensional problem for a two-layer atmosphere. The results are compared with experimental observations for this region. Certain features of the orographic disturbances over mountain ranges are explained.
Show AbstractSpatial distribution of a bounded plasma
Spatial distribution of a bounded plasma
V.A. Gogyak and V.N. Maksimov
We propose a simplified model of the positive column of a strongly anisothermal plasma, based on the assumption of ion drift in strong fields, while the inertia of the ions is formally taken into account by limiting the velocity of ambipolar drift at the boundary of the plasma to the ionic speed of sound. This permits finding simple relations for the ionization frequency and boundary concentration of the plasma as functions of the similarity parameter of the discharge. It is shown that the region of applicability of the simplified model on the side of high gas pressures borders the region of applicability of Schottky theory.
Show AbstractSpace correlational properties of bottom reverberation when using dipole receivers and tonal radiation by a discrete linear antenna
Space correlational properties of bottom reverberation when using dipole receivers and tonal radiation by a discrete linear antenna
N.S. Vinogradov, F.V. Rozhin, and 0.S. Tonakanov
The results of a theoretical calculation of the spatial correlation functions of bottom reverberation picked up by a pair of dipoles differently oriented in a horizontal plane are presented. The condition for the mutual position of the radiation patterns of the dipoles and the radiating antennas for which the action of reverberation interference is a minimum are obtained.
Show AbstractTransition radiation of a "cherenkov" charge in a nonstationary medium
Transition radiation of a "cherenkov" charge in a nonstationary medium
V.A. Davydov
Accurate expressions are obtained for the radiation fields of a "Cherenkov" charge when there is an instantaneous jump of the dielectric constant with time, neglecting dispersion.
Show AbstractDielectric losses of strontium titanate at microwave frequencies
Dielectric losses of strontium titanate at microwave frequencies
I.M. Buzin
The method of dielectric resonator was applied in the determination of the dielectric losses of ferroelectrics in the decimeter and three-centimeter wavelength bands. The minimum values of tgδ obtained from the measurement in neither case exceed(3 to 5)•10^(-5). The function tgδ(Т)in the temperature range 78-350°K of mono- and polycrystalline strontium titanate was studied.
Show AbstractKinetics of chemical reactions in a one-component system contained in a non-maxwellian light gas thermostat
Kinetics of chemical reactions in a one-component system contained in a non-maxwellian light gas thermostat
A.A. Goroshkov and A.I. Osipov
It is shown that in a reacting one-component system contained in a light gas thermostat, a relatively small distortion in the "tail" of the Maxwellian distribution of the particles of the thermostat can lead to a noticeable change in the rate of reaction. The velocity• distribution function of the reacting component is found, and concrete expressions for the rate of chemical reactions in a non-Maxwellian thermostat are obtained. As an example, the reaction HI + HI = $I_{2}$+$H_{2}$ in an atmosphere of He is examined.
Show AbstractDetection of gravitational waves by lumped electromagnetic systems
Detection of gravitational waves by lumped electromagnetic systems
M.V. Sazhin
The effect of gravitational waves on electromagnetic systems with lumped parameters as investigated. A method of calculation of the effect of gravitational radiation on compact electromagnetic systems using a Lagrangian formulation is developed. As concrete systems, an electromagnetic circuit and a network of circuits are examined. Different alternative methods are considered. The possibility of detection of gravitational waves from cosmic sources is analyzed. Requirements are formulated on the technical parameters of the detectors, which give hope to the possibility of detection of gravitational waves.
Show AbstractQuasi classical approximation in spinor electrodynamics
Quasi classical approximation in spinor electrodynamics
Yu.G. Pavlenko
In this paper the equations of motion of particles in an external field are obtained on the basis of the Dirac Lagrangian, and a relativistic expression for the Glauber propagator is found.
Show AbstractStatistical estimates in the converse problem of the scattering of scalar waves
Statistical estimates in the converse problem of the scattering of scalar waves
V.A. Burov and A.A. Goryunov
The problem of the nonlinear filtering of a sample in order to obtain the optimum estimate (in the sense of the maximum-likelihood method) of the scattering nonuniformity of the density of the medium, and the velocity of sound in it when the primary field source has a known form in the presence of five types of interference with a normal distribution and with known second-moment matrices is solved.
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