Use of Cullet of Different Chemical Compositions in Foam Glass Production

The results of studying the possibility of using cullet of different chemical compositions accumulated at dumping grounds for foam glass production are described. It is established that sodium silicate introduced into cullet in the form of water glass partly destroys milled cullet and homogenizes the chemical composition of the batch and its most significant technological properties. Due to the chemical reaction between water glass and the surface of milled cullet particles, silicates are formed containing bound water, which is released at high temperatures (600 – 620°C) and facilitates frothing of foam glass. Water glass in a batch increases the quantity of the vitreous phase and decreases the propensity of glass for crystallization.     

Segmentation of video sequences and rate control

This paper deals with the relation between segmentation for coding and rate control. The efficiency of a segmentation-based coding scheme heavily relies on this step that defines how many and which regions have to be segmented. In this paper, we show that this problem can be formulated as a rate/distortion problem. The proposed solution not only controls the segmentation, but also defines the coding strategy to be used in each region. Together with the general approach, several simplified versions of the segmentation control are proposed and discussed.     

Copolymerization of acrylonitrile,methyl acrylate,and itaconic acid in thiocyanate solutions in the presence of hydrolyzed nitron fibre waste

Conclusions -- The kinetics of the copolymerization process of AN, MA, and IA in the presence of hydrolyzed Nitron fibre characterized by various degrees of hydrolysis has been studied. It has been found that introducing H-PAN into the reaction mixture leads to an increase in degree of conversion in the copolymerization process and to an increase in molecular weight of the copolymer synthesized.-- Fibre has been spun from the products of joint copolymerization of AN, MA, and IA in the presence of H-PAN with various concentrations of these in the solution and various SEC values. Introducing up to 5% by wt. of an H-PAN with an SEC not over 0.2 meq/g into the reaction mixture aids in obtaining fibres with satisfactory properties and opens up the possibility of still another way of solving the question of regenerating wet Nitron fibre wastes.Translated from Khimicheskie Volokna, No. 4, pp. 17–19, July–August, 1991.     

Strength of bimetal composite under conditions of variable temperatures

An analytical solution of the problem is given on the thermally stressed condition of a two-layer material in planar solution where layers differ in temperature expansion coefficients and elasticity moduli.Translated from Problemy Prochnosti, No. 11, pp. 74–78, November, 1991.     

Large-scale experimental blasting on the Uch-Terek river

Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 5, pp. 12–15, May, 1990.     

Hollow corundum spheres for high temperature thermal insulation

Conclusions We developed a technological route for the production of hollow electrocorundum spheres intended for manufacturing highly refractory thermal insulation products, concrete bodies, and loose charges. The technology was tested under industrial conditions.Translated from Ogneupory, No. 7, pp. 27–30, July, 1987.