Manufacture of Two-layers and Double-sided Iron Castings with Differential Structure and Properties

The paper proposes a new method of production of bilayer and double-sided castings with differentiated structure and properties using the technology of in-mold modification of the initial melt, smelted in a single melting furnace, which ensures formation of hard wear-resistant white iron as the working layer, and formation of ductile shock-resistant cast iron with nodular graphite as the core or the mounting part. Numerous laboratory studies confirm the feasibility of the proposed method and provide conditions ensuring differentiation of structure and properties in local parts or layers of castings. The prospects of the method for manufacturing a wide range of industrial castings are indicated

Cases in methods of teaching Russian as a foreign language

The article deals with the specificity of using cases in teaching Russian as a foreign language (RFL) to the adults getting higher professional education or studying Russian for personal goals. The research describes operational phases in the educational process of cases and presents the innovative three-component model of the case. The model is based on features of teaching Russian as a foreign language and takes into account the level of the language proficiency, peculiarities of students and learning environment. The authors define greatest challenges and positive aspects of using cases and lay down their efficiency conditions. The structure of the case developed and proposed in the article can be used in teaching any European language (with some modifications connected with features of culture and everyday life of this or that country). Efficiency of the method, proposed in the article, has been tested at Omsk Tank-Automotive Engineering Institute in the groups with the student number not exceeding 10 persons. The article formulates general methodical requirements and conditions enhancing the productivity of teaching Russian as a foreign language while using cases, positive and negative aspects of cases in methods of teaching Russian as a foreign language

Investigation of the thermophysical properties of high-melting materials with the aid of a complex of instruments

The evaporation rate, vapor pressure, heats of evaporation reaction (sublimation, dissociation), enthalpy, electrical resistance, heat capacity, emissivity, and heat conductivity of various carbides, borides, sulfides, nitrides, selenides, and phosphides were investigated. A set of high temperature high vacuum devices, calorimeters (designed for operation at 400 to 1300 K and from 1200 K), and mass spectrometers, most of which were specially developed for these studies, is described