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Reports on the development of a model of an asymmetric weakened zone in problems of interaction between cracklike defects in an elastic medium by researchers from Moscow, Russia. Effects of subjecting the entire surface of cut edges to the action of distributed adhesive forces; Exhibition of discontinuities during displacements; Suitability of the model for studying the interaction of cracklike defects.

Discusses invariant integrals in problems of a crack at the locus of inhomogeneity and in contact problems by researchers from Novosibirsk, Russia. Elucidation on the existence of an invariant integrals; Establishment of its existence in the problem of an elastic body that interacts with a rigid stamp; Reference of the existence of invariant integrals in the linear theory of cracks as Chepanov-Rice integrals.

Reports on the blocking of a Rayleigh wave by a subsurface crack by researchers from Krasnodar, Russia. Significance of relatively studying the Rayleigh waves diffraction by surface and subsurface obstacles; Use of reflected and transmitted signals in flaw detection to yield information on zones of exfoliation of film structures and nanocoatings.

Reports on VNIPIneft Co.'s experience in designing hydrocracker units at the oil refinery in Russia. Operating pressure and temperature; Use of a double-flow reactor block and stabilization unit scheme; Output of the unit in feedstock per year for the winter and summer diesel fuel version; Advantages of the T-Star process;

Reports on VNIPIneft Co.'s experience in designing cat crackers at oil refineries in Russia. Conversion to a zeolite-containing catalyst; Operating pressure and temperature; Implementation of the reactor-regenerator unit and system for preparation of stack gases for recovery; Diagram of the fractionation and gas separation unit.