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The Bulletin of the Adyghe State University, the series “Natural-Mathematical and Technical Sciences” |
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#3 / 2012MathematicsS.K. Kuizheva, L.Zh. PalandzhyantsThe characteristic system of the equtions for some class of algebraic differential equtions The concept of the characteristic system of the equations for some class of algebraic differential equations is formulated. The characteristic system of the equations for a certain class of the algebraic differential equations is calculated in a general view. The nonlinear differential equations of an interface and Benjamin-Bon-Mahoney’s equation for which the characteristic equations are found in an explicit form are examined as an example.
On representations of some group of the cellular and triangular matrices of the fourth order The paper examines the group of the fourth order cellular and triangular matrices. Preliminarily some special decomposition of nondegenerated material matrices of the second order is considered. Group parametrization is made. Then unitary group representations as the operators realized in space of finite and infinitely differentiated functions are constructed.
PhysicsE.S. Astapova, S.S. Pavlov, I.A. AstapovDetermination of structure characteristics and conductivity of Na-HS-zeolite with Mo, W and Ni nanopowders This work discusses structure and properties of synthetic zeolite modified with electroexplosion nanopowders of transition metals. The authors determine the structural type of zeolite and the unit cell parameters, as well as calculate specific surface and the pore volume. The thermal properties of modified samples are shown. Dependence of specific conductivity upon temperature, as well as activation energy are determined by using experimental data of resistance.
Natural SciencesE.A. SirotyukVital forms of Gentianaceae in the Western Caucasus: systematic and ecologic-evaluation analysis This work provides the results of studying vital forms of Gentianaceae of the Western Caucasus and their distribution by genera, elevation belts and types of habitats. It is shown that terophytes and terophyte/hemicryptophytes prevail in the family. The mountain and wood species are, mainly, hemicryptophytes. Vital forms of gametophytes and cryptophytes are characteristic only of representatives of genus Gentiana L.
The natural potential of the territory as a formation factor of regional farming systems (as shown by the flat landscapes of the Western Caucasus and Lower Don) This paper shows the role of natural potential in formation of regional farming systems. The authors give the factor analysis of agrocenoses productivity, which can find application in the form of algorithms and technological standards at creation of ecologically balanced farming systems. The authors’ recommendations make it possible to develop the rational schemes of the use of resources for increasing the agroecosystem productivity.
Influence of ways of soil processing and fertilizer norms on its agrochemical properties This work discusses the results of researches on studying a content of available forms of nitrogen, phosphorus and potassium, as well as influence of ways of the basic soil processing and fertilizer norms on humus balance. It is inferred that against a background of high norms of fertilizers the greatest gain in humus content is provided by the combined soil processing, which results in increasing the quantity of humus in all parts of an arable layer. The surface soil processing gives 2,2 times smaller increase in humus content, which proves to be the least during experience, despite the greatest gain in the top layer.
History and biology of a pheasant in the Western Caucasus Phasianus colchicus L (lat.) Mezchet (in Adyghean) This work provides the analysis of literature on a pheasant. Observations of pheasant distribution in high-altitude belts of the Adygheya Republic are systematized, including a steppe zone, belts of forest-steppe and the broad-leaved forests, dark-coniferous forests, the subalpine and Alpine belts, the subnival and nival belts, as well as data on reproduction, food and habitats of a pheasant in the Western Caucasus.
Oxygen exchange in teenagers in the conditions of highlands This work discusses the results of three-year longitudinal researches (2006–2008) on 14–15 year-old teenagers (of both sexes), living in high-altitude and flat territories of the Adygheya Republic. The author determines breath parameters in the conditions of physical activities: frequency, respiratory volume and the minute volume. Authentic distinctions are revealed in volume of lungs depending on accommodation conditions. In mountain conditions the volume of lungs of school children is truely less than that of contemporaries living in flat territories. Gender distinctions in all breath indicators are authentic for the school children who are living in high-mountainous widths and engaged in power sports.
Influence of ways of vising on performance of the single manual movement by children of the advanced preschool age This paper studies influence of ways of vising on manifestation of the latent period of impellent activity in single movement of children of the advanced preschool age. It is inferred that indicators of duration of the latent period decrease with increasing age, which testifies to expansion of impellent experience of the child and to achievement of a certain level of impellent ability by it.
Ethnogeographical features of distribution of gene BRCA1/2 mutations in patients with malignant new growths of female reproductive organs In America, Africa, Eastern and Central Europe, including Russia (the Central and Siberian regions), 185delAG and 5382insC mutations of gene BRCA1 are revealed in patients with cancer of female reproductive organs more often. High frequencies of BRCA1 mutations which are not found in other regions of the world are characteristic of Australia, Japan, China and Northern Europe. The widespread allel BRCA variants cannot be used as universal markers of cancer of various localizations.
Specificity of human leukocyte antigens of the second class (HLA II) associated with risk of development of bronchial asthma in world populations Protective antigens and antigens associated with bronchial asthma in world populations are localized dominantly in HLA-DRB1, -DQA1 and -DQB1 – the main complex of a histo combination of the people. The greatest number of the associated specificities is revealed in DRB1 (10) and in DQB1 (8) loci, it is less in DQA1 (4). Similar regularity is characteristic of protective allels: most of them are in DRB1 (5) and in DQB1 (6), but in DQA1 (1). Separate specificities (DRÂ1* 04, DQA1* 0301, DQB1* 0501) are found in the different people which can be both protective and associated with bronchial asthma. In the Russian Federation, DRB1*07, DRB1*08 and DQB1*05 specificities are associated with risk of development of bronchial asthma. They were revealed in two populations of the Russian in the Astrakhan and Moscow areas. In Astrakhan and Moscow probands with bronchial asthma different specificities of HLA-DRB1 locus are associated: correspondingly HLA-DRB1*08 and HLA-DRB1*07 allels. Protective antigens in DRB1 locus for the surveyed populations are not identified.
Technical SciencesV.A. Kravtsov, V.I. ChizhikovUse of printed-circuit boards in the microwave devices Using the microstrip lowpass filter as an example, an analysis is made of a possibility of application of printed-circuit boards in the microwave devices as an alternative to high-cost boards on a ceramic substrate. The microstrip lowpass filter of the ladder type is calculated to assess possibilities of replacement of strip boards basing on polybark substrates by new printed-circuit boards. The offered printed-circuit boards can successfully replace high-cost boards on a ceramic substrate in a number of tasks.
Choice of methods of forecasting in researches of complicated systems To develop authentic forecasts it is necessary to define the method of forecasting corresponding to specificity of object of forecasting. In this regard characteristics of object of forecasting – extensiveness and complexity – are examined. The authors suggest the way of their definition and distribute the methods of forecasting by levels of extensiveness and complexity of objects of forecasting.
Software product construction on the basis of the microkernel architecture An analysis of the microkernel architecture is made to use it in software products. The use of the software microkernel allows us to support system work without its basic shutdown. The main architecture criterion is the requirement of microkernel invariance. Any changes in the system infringe only upon the user modules. The microkernel serves as a link between modules. An analysis is made to show the advantages of such products.
Efficiency assessment of involvement of nonconventional renewable energy sources in energy balance of the region The paper discusses the main criteria for an efficiency assessment of involvement of nonconventional renewables in fuel and energy balance of the region. The offered system of criteria is complex; it takes into account costs for creation of production base of power and allows efficiency estimation of use of systems with renewables in a region power supply system. The assessment of the stated criteria according to the given technique is a basis for development of optimizing model of involvement of renewables in a region energy balance.
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