A.L. Kotkin, Yu.V. Pavlov, and R.M. Umarkhodzhaev

K.P. Belov, A.N. Goryaga, L.A. Skipetrova, and T.Koraiem

G.A. Lyakhov and V.A. Makarov

G.N. Medvedev and В.I. Morgunov

Yu.B. Chernyak and G.G. Solov'ev

Two simple models of the spatial dependence λ(z) are used with first- and secondorder perturbation theory (developed in [1]) to determine the intensity of the emerging radiation and the coefficient of reflection in the case of monochromatic scattering in a semiinfinite medium. Higher-order perturbation theory is briefly discussed. The results obtained can be used in model calculations to take into account the roughness of the surface of a light-scattering medium, and to determine the light-scattering characteristics of diffusely reflecting dyes as functions of surface properties.

V.I. Shestakov

Standard matrix methods were shown in [1] to be unsuitable for the symbolic representation of cascade connected two-port networks (quadrupoles) when at least one of the branches has an infinite impedance. In this paper, we give a further development of the previously proposed representation of cascade connected twoport networks, and show that the method is valid for any values of the branch impedances, both finite and infinite.

L.M. Volkova, A.M. Devyatov, and V.Kh. Fazlaev

Spectroscopic data on the discharge initiated in a cooled hollow cathode are used to determine the discharge temperature and the concentration of atoms and ions of strontium.

A.A. Pomerantsev

A method is developed for the solution of the one-dimensional problem of thermal conduction with the moving boundary conditions, namely, the problem of solidification and melting. By transforming the variables, the problem Is reduced to that of fixed boundary conditions. Examples of solutions are reproduced

A.A. Belyaev, I.P. Ivanenko, and A.A. Kirillov

A new analytic solution is presented for the one-dimensional problem of electromagnetic cascade theory, taking into account ionization losses and the Landau- Pomeranchuk effect. The ionization losses are not assumed to be proportional to the variation in the number of particles in the shower, but are taken into account by direct approximation of the collision integral, so that the specific properties of the medium are more accurately taken into account. The proposed approximation and the solution presented in this paper can be used to obtain the distribution functions with their prescribed accuracy. These solutions are valid in a broad energy range and yield improved versions of known distribution functions.

V.M. Chepurova

Differential equations are presented for the nonangular elements (semimajor axis, eccentricity, and inclination) of an intermediate hyperbolic orbit of a mass point moving in the gravitational field of a condensed planet, subject to a perturbation by another planet. The intermediate orbit is based on the symmetric variant of the problem of two fixed centers. The perturbation function is taken in the form of the Hill term in the expansion of the potential due to the perturbing planet, corrected for the elliptical character of its motion. The righthand sides of the equations are in the form of trigonometric series whose arguments are combinations of the angular elements of the intermediate motion of the mass point and the angular elements of the perturbing body, whereas the amplitudes depend on the nonangular elements of the two and are series In powers of the small parameter of the problem of two fixed centers.