P.P. Pavlov and A.Kh. Khrgian

Calculations are presented on the shape and size of the zone in the atmosphere where the ozone concentration is reduced on account of contamination with oxides of nitrogen. It is shown that the local effect of the contamination is small and short - lived, but that oxides of nitrogen taken globally form a persistent catalyst that progressively reduces the ozone level in the atmosphere. However, predictions on the latter effects are difficult because the available values for the photochemical reaction constants are very imprecise, as are the values for the levels of various minor components, in particular atomic nitrogen.

I.P. Zvyagin

A balance equation for electron transitions is obtained, with allowance for corirelation of the electrons at the same center, in the framework of the Hubbard model. A procedure is indicated for the introduction of a small temperature gradient in the kinetic equation for hopping transport. It is shown that the conductivity problem amounts to finding the conductivity of two three-dimensional branched networks of random resistances. Under certain conditions these networks may be considered quasi - independent.

G.P. Dzhotyan and Yu.E. D'yakov

Theoretical results are presented on induced Raman scattering for multimode pumping in the linear state and in the saturated state; it is shown that the spectrum of a monochromatic Stokes signal can be broadened in multimode pumping. The effects of such pumping on the conversion factor are examined, together with the scope for suppression of induced Raman scattering by interference.

V.N. Damgov (Bulgaria)

Equations are derived for the effects of harmonics on the amplitude of the fundamental in nonlinear resonance.

V.L. Bonch - Bruevich

The conditions for the existence of a Coulomb gap in the energy spectrum of disordered semiconductors are studied without assuming a particular model (specifically, without specializing to an explicit form of screened interaction potential).

Yu.K. Alekseev, D.G. Afonin, and A.I. Kostienko

A hemispherical open cavity containing a plane - layer structure is considered; it is assumed that the wave front is planar near the plane mirror, in which case a simple method gives an equation for the natural frequencies. Theory and experiment have been compared for a one - layer dielectric plate.

В.I. Spasskii arid A.V. Moskovskii

Using as examples the Aharonov - Bohm effect and the Einstein-Podol'skii - Rosen paradox the question of the applicability of the proximate action vs. action at a distance dilemma in the behavior of quantum objects is discussed. The state of the formulation of the problem of interaction in classical physics is discussed.

R.P. Vasil'eva, N.N. Kurbaniyazov, Kh.G. Babaev, and Yu.N. Arkhipov

K.P. Belov, A.N. Goryaga, A.V. Ped'ko, and A.I. Kokorev

I.V. Rechitskii and V.P. Efrosinin