The method first suggested by V.A. Kondrat'ev has been applied to construct an asymptotic representation of the electromagnetic field of a waveguide nearby the boundary edge. An explicit form of the spectral problem solution in the neighborhood of the edge where the waveguide has a sector-shaped cross-section has been given.
Show AbstractThe heat capacity of $\gamma$-phase solid oxygen has been computed on the basis of the correlation theory of crystalline state. The forms of molecular motion are determined in either of the two nonequivalent positions.
Show AbstractExplicit solutions for one completely integrable system of three particles in an external field have been found. A relation between the initial conditions, coupling constant, and the time of fall of two particles into the interaction potential singularity has been obtained.
Show AbstractNumerical simulation method has been used to analyze the role of the $(\gamma,2n)$ reaction channel in the formation of light stable isotopes on irradiation of the $^{204}$Pb nucleus with intense $\gamma$-quanta beams.
Show AbstractAngles of incidence and refraction angles are assumed to be complex when light is reflected from the interface of two absorbing media. The components of complex angles are calculated by Snell's law of refraction. Under this assumption, calculating the reflected and refracted energy fluxes by the Fresnel formulas results in the total energy balance.
Show AbstractThe order parameter $S$ of homeotropically oriented thin liquid-crystal polymer films placed in an electrooptical cell has been determined. The optical parameters of electrodes have been determined from the observed quasi-periodic polarization spectra by the method of interferometric extrema envelopes and the true polarization absorption spectrum of the polymer has been restored. The quantity $S$ has been calculated from the dichroic ratio in the absorption band at $\lambda=405$ nm with due regard for the local field effects.
Show AbstractA three-parametric model has been suggested for fluorescence-accompanied photophysical processes in photosynthesizing organisms under laser pulse excitation. The model parameters include the excitation cross section of chlorophyll-$a$ molecules determined both by direct absorption of exciting radiation and by energy transfer from auxiliary pigments, the lifetime of the excited state in these molecules defined by their linear deactivation rate, and the singlet-singlet annihilation constant.
Show AbstractMagnetic susceptibility of naturally occurring mineral biotite as a function of the temperature and heat-treatment time has been analyzed and probable physicochemical processes responsible for these dependences have been described.
Show AbstractA new method has been suggested for calculating the magnetic parameters of ferromagnetic films based on measuring the torque acting on the film at the state of equilibrium in a magnetic field.
Show AbstractThe electrophysical properties and the structure of copper stearate films deposited on the semiconductor (germanium and silicon) surface by the Langmuir—Blodgett method have been studied. The Langmuir—Blodgett films have been demonstrated to have electron trapping sites, which recharge under photoiiyection of charge carriers from the bulk of semiconductors. It is found that the recharging of these centers results in the ordering of the structure of deposited copper stearate layers.
Show AbstractTransition to a noncommutative thermomechanical deformation has been described. The criterion of deformation plasticity, which is the condition of Prigogine evolution, has been obtained as well as the condition for laminar structure appearance.
Show AbstractCalculations of displacement fields in the vicinity of solitary substitutional impurity atoms in the hexagonal closed-packed (HCP) structure performed in the microscopic approximation revealed a nonchaotic character of arrangement of the displacement vectors of matrix atoms. This was caused both by the size difference between the impurity and the matrix atoms and by special features of the HCP structure.
Show AbstractBased on the neutron flux measurements taken in 1996 near the Earth's surface simultaneously in two opposite directions (away from the Earth's surface and towards it), it is established that near the Earth's surface the neutron flux direction changes periodically with season: in winter, it is directed towards the surface, while in summer, away from it.
Show AbstractIt has been demonstrated that the effect of gravitational bending of light rays can be used in searching for stars possessing a scalar charge.
Show AbstractIn the context of perturbation theory it is demonstrated that embedded eigenvalues of a spectral problem for a waveguide filled with inhomogeneous substance change into complex resonances under small perturbation of material filling. For this purpose it has been proved that already in the first order of perturbation theory eigenfunctions do not belong to the space L$^2$, although the eigenvalues corresponding to them remain real in the same order of smallness.
Show AbstractRanges of parameters corresponding to convective, thermal, and acoustic instability of a plane layer of a vibratory-nonequilibrium gas have been calculated.
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