Effective parameters of static coupled physicomechanical field in matrix composites

Conclusions It is shown that the problem of evaluating the effective parameters of composites for a wide range of stationary coupled fields is reduced to examining uncoupled fields.The multiparticle method of the effective field was generalized with special reference to the problems of examining the static coupled physicomechanical fields in composites.Translated from Fiziko-Khimicheskaya Mekhanika Materialov, Vol. 27, No. 4, pp. 105–111, July–August, 1991.     

A contribution to the theory of parametric excitation of thermomechanical oscillations

The conditions for a rather fast increase in parametric thermomechanical oscillations have been revealed by using numerical solutions of some types of Hill's equation. It is shown that the occurrence of a real parametric resonance is essentially determined by the character of thermal modulations. It is hypothesized that the indicated trends are observed in oscillations of any physical nature.Stavropol State Pedagogical Institute, Stavropol. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 63, No. 3, pp. 294–298, September, 1992.     

Analysis of the formation of glass waste in the electric lamp industry

Translated from Steklo i Keramika, No. 1, pp. 6–7, January, 1991.     

Precision winding of fiber optic filament. II. Winding control

For pt.I see ibid., vol.39, no.3, p.258-67 (1992). The winding of fiber optic filament in the hoop, or precision, pattern is considered. Various automatic control options that have been designed and tested are described. The controllers are designed to regulate the fiber lag angle, which is the angle at which the feed filament approaches the take-up spool. Successful, flawless winding is directly related to accurate lag regulation. The contributions are distinguished by the fact that the automatic winding rate is 10 to 30 times greater than that achieved before by operator-assisted winding     

Approximate account of double gas throttling in the pressurization openings of gas bearings

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 8, pp. 20–22, August, 1991.     

Standardization efforts for wireless LANs

The Digital European Cordless Telecommunications (DECT) draft standard, which is the only wireless local area network (LAN) standard close to the 1-Mb/s data rate is briefly described. Active standards groups and their activities are reviewed. The work of the IEEE working groups for wireless LANs is examined     

Flow and heat transfer in outlet pipes of cryostatting systems

Flow and heat transfer at mixed convection in the vertical channel connecting a cryogenic vessel and a room temperature zone are considered. The two-dimensional problem of conjugated heat transfer in the metal wall of the channel and in its cavity is solved by the finite difference method. The calculated values of the heat flux into the cold zone and of the temperature of the hot pipe end at different channel wall thicknesses, lengths, diameters, helium flowrates, as well as at different constants of the interaction of heat with the environment are given.A. V. Lykov Heat and Mass Transfer Institute, Academy of Sciences of Belarus, Minsk. Translated from Inzhenerno-fizicheskii Zhurnal, Vol. 63, No. 6, pp. 665–672, December, 1992.     

Grigorii Valentinovich Samsonov: Novosibirsk Period in the Study of Borides

This paper, dedicated to the memory of Grigorii Valentinovich Samsonov (15 February 1918 – 22 December 1975) [1, 2], corresponding member of the Ukrainian Academy of Sciences, gives a brief survey of the fruitful cooperation of this prominent researcher in materials science with the scientific community of the city of Novosibirsk. Results that have come from cooperation with G. V. Samsonov are unique indeed. They are related to the study of phase equilibria in boron-containing systems, mechanisms of interactions between boron and metals, and synthesis of high-melting borides (in particular, in the ultradisperse state). A vast amount of research has been focused on the development of coatings based on various modifications of boron nitride and related materials.