Simulation of electronic processes of nanoenergetic gas generator using Cabrera Mott oxidation model

This research study is a theoretical framework for understanding rapid thermal processes which occur during the performance of new Nanoenergetic Gas-Generators (NGG) systems that rapidly release a large amount of gaseous products and generate a fast-moving thermal wave during the explosion. The kinetics of rapid oxidation of metal nanoparticles acquires practical importance with the quickly developing nanoenergetic systems. The thin film oxidation theory of Cabrera-Mott model was examined for a spherically symmetric case and used to analyze the physical importance of the exothermic processes for prediction of the reaction time and front velocity. A rapid kinetic of oxide growth on the outer part of oxide layer of aluminum ions during the oxidation of a spherical aluminum nanoparticle was evaluated by using the Cabrera - Mott moving boundary mechanism with self-heating process. The electrical potential was determined and correlated to the reaction time, which a leads to the solution of a nonlinear Poisson equation in a moving boundary domain. Motion of the boundary is determined by the gradient of a solution on the boundary (via a Gibbs factor). We have considered an accurate self-heating model of particle oxidation based on the balance of energy released as a result of chemical reaction. We have used detailed modeling of the heat loss, which is mainly due to convection. We investigated this problem numerically, using COMSOL and MATLAB for detailed air convection dynamics. It was demonstrated that the oxidation rates dramatically increased as a combined effect of nonlinearity and self-heating

Building of professional communicative competence in foreign students

The Turkish students who study at Russian universities continue learning Russian at the main departments. The main difficulty which foreign students face while learning Russian is scientific style. Those who teach Russian as a foreign language admit that foreign students are often unprepared to learn specific vocabulary. The article covers a completely different approach for presentation of specific vocabulary, developed by the authors of “Training for professional activity in Russian of “Public Relations” speciality foreign students” (L.V. Adonina, S.V. Lazarev, S.V. Smirnova, O.S. Fisenko)

The use of results of investigative activities in proving criminal cases: national and foreign experience

This article discusses issues of the improvement of operative-search activity, local and foreign experience. Without the support of criminal procedural activity for operative-search activities, without developing a joint mechanism for the presentation and use of the results of operative-search activity in proving in criminal cases, it is impossible to achieve success in the disclosure and investigation of a significant number of crimes committed

Sequence stratigraphic interpretation methods for low-accommodation, alluvial depositional sequences: applications to reservoir characterization of Cut Bank field, Montana

In South Central Cut Bank Sand Unit (SCCBSU) of Cut Bank field, primary production and waterflood projects have resulted in recovery of only 29 % of the original oil in place from heterogeneous, fluvial sandstone deposits. Using highresolution sequence stratigraphy and geostatistical analysis, I developed a geologic model that may improve the ultimate recovery of oil from this field. In this study, I assessed sequence stratigraphic concepts for continental settings and extended the techniques to analyze low-accommodation alluvial systems of the Cut Bank and Sunburst members of the lower Kootenai formation (Cretaceous) in Cut Bank field. Identification and delineation of five sequences and their bounding surfaces led to a better understanding of the reservoir distribution and variability. Recognition of stacking patterns allowed for the prediction of reservoir rock quality. Within each systems tract, the best quality reservoir rocks are strongly concentrated in the lowstand systems tract. Erosional events associated with falling baselevel resulted in stacked, communicated (multistory) reservoirs. The lowermost Cut Bank sandstone has the highest reservoir quality and is a braided stream parasequence. Average net-to-gross ratio value (0.6) is greater than in other reservoir intervals. Little additional stratigraphically untapped oil is expected in the lowermost Cut Bank sandstone. Over most of the SCCBSU, the Sunburst and the upper Cut Bank strata are valley-fill complexes with interfluves that may laterally compartmentalize reservoir sands. Basal Sunburst sand (Sunburst 1, average net-to-gross ratio ~0.3) has better reservoir quality than other Sunburst or upper Cut Bank sands, but its reservoir quality is significantly less than that of lower Cut Bank sand. Geostatistical analysis provided equiprobable representations of the heterogeneity of reservoirs. Simulated reservoir geometries resulted in an improved description of reservoir distribution and connectivity, as well as occurrences of flow barriers. The models resulting from this study can be used to improve reservoir management and well placement and to predict reservoir performance in Cut Bank field. The technical approaches and tools from this study can be used to improve descriptions of other oil and gas reservoirs in similar depositional systems

The Importance of Bologna-style Credit-based Training in Kazakhstan Higher Educational Institutes

This article discussed the reform of higher education in Kazakhstan following the Bologna model. In particular it deals with the use of credit-based systems and what advantages these systems are expected to bring both for students and for universitie

Seed productivity of Rosa oxyodon Boiss

This article presents the results of the study examining the pollination process and seed reproduction in the sharp-toothed wild rose (Rosa oxyodon Boiss.) endemic to the Caucasus. The objects of the study are natural populations of the studied species. To study the processes of pollination, loose buds were isolated with flesilin bags using the method of I.A. Shantser. When studying the germination of R. oxyodon seeds, various sowing options were carried out on the Gunib Plateau: 1) sowing with seeds collected from fruits of different degrees of maturity in August, September, and October in open ground; 2) spring sowing with seeds collected from mature fruits after stratification, scarification and without them. In each variant, 100 seeds were sown. The aim of the study is to examine the reproductive characteristics of R. oxyodon endemic to the Caucasus. Our studies demonstrate that zero percent of R. oxyodon fruits form through self-pollination and geitonogamy. In its natural environment, the species yields enough seeds for potential seed reproduction of a population. Our findings revealed that R. oxyodon is an obligate self-incompatible entomophilous species with low productivity coefficient but high fecundity potential, which guarantees stable seed reproduction of the species. R. oxyodon seeds are characterized by mixed and long dormancy period