Propagation of metric and decimetric radio waves in forest environments has been studied. The plant-induced shadowing effect in the receiving point has been analyzed on the basis of a two-path mechanism of field formation. The ratio between the inputs of the diffractive and propagated components has been studied at various problem parameters. The modeling results have been compared against the experimental data received at the frequencies of 200 and 463.9 MHz.

This work deals with simulation of radio-wave propagation in cities. The field behavior in a shadow area, created by the relief of the underlying terrain, has been researched on the basis of the Huygens-Kirchhoff method. An engineering formula has been obtained for UHF/VHF waves to calculate the signal level in urban conditions with regard to the path profile.

The design procedure for of electromagnetic field strength behind the forest canopy layer for dual mechanism of wave propagation in case of radio transmitter installed at a big height is presented. A comparative analysis of contribution of diffraction and refraction electric field components forming the resultant field at a point of reception for vertical and horizontal polarizations is realized. Comparison of experimental and calculated results at 200 MHz frequency is executed

It has been shown, that the destruction of the coastal strip in region of action of Mikhailovsky landslide results in change of species structure and dominant species photophilous Cystoseira barbara on sciophylous Gracilaria verrucosa. In accordance with increasing sediments amount in sea water biomass and the morpho-functional parameters of the photophilous species are reducing, and at the sciophylous are growing. Progressing phenomenon of epiphytism is observed in algal populations in the southern part of researched region which is possible to consider as response reaction, leads to increase a synthesizing surface. Decreasing physiological activity is compensated by growth of the total surface of macrophytes. The increase of a sea water sediments leads to lowering ratio of long and shortwave pigments level of ATP-ase activity and raising concentration of the total sum of pigments in thalli.

The excitation function is measured for 7Be+p elastic resonance scattering at an angle of 180° in the center-of-mass frame. The measurements are made by a new method which combines the advantages of inverse kinematics and thick targets. New information is obtained about the structure of the levels in the 8B nucleus.

A qualitative analysis is given for the influence exerted by an electromagnetic field and the rotation of a cylinder on the velocity, pressure, and thickness of a film, on the temperature distribution within the film, and the yield of nonmetallic particles from the film.

The possibility of use of reactions induced by /sup 14/N such as /sup 14/N+/sup 12/C..-->..d+/sup 12/C+/sup 12/C for study of quasimolecular states is investigated. The results indicate that such investigations are promising.