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#4 / 2013
On existence of third-order linear differential equation with continuous ranges of complete and vector frequencies
The third-order linear uniform differential equation with continuous unlimited coefficients is constructed. Its ranges of complete and vector frequencies contain the same segment of values.
V.B. Tlyachev, A.D. Ushkho, D.S. Ushkho
Assessment of the number of straight-line isoclines of the polynomial vector fields on the plane
The problem to be solved is to assess the number of straight line – isoclines of autonomous differential system with polynomial right part on the plane. It is shown that if the system has at least one special point and meets the following conditions: the right parts of system are mutually simple polynomials of n degree and, the right part of at least one of the equations of system contains the uniform polynomial of less than n degree, then the number of its straight line-isoclines does not exceed 6n-5 (n>=2). Under the same conditions, the number of invariant straight line-isoclines of system is proved not to exceed 3n-1 (n>=1). Besides, various theorems about the number of parallel straight line-isoclines and straight line-isoclines, incidental to separately taken special point, are proved.
E.A. Sirotyuk, O.A. Panesh, S.I. Chitao, D.A. Kuasheva
Condition and prospects of studying relic, endemic, rare and disappearing plants of Adyghea
This paper provides preliminary results and prospects of studying rare, disappearing, relic and endemic plants of Adyghea by staff of Botany Department from the Adyghe State University. The obtained data expand ideas of republic flora and are a basis for reconstruction of its history. They can become a scientific basis for protection and rational mangement of flora of Adyghea.
G.N. Ilchenko, N.G. Berezkin
Features of flowering and ways of hybridization of eugenol basil
Research studies on biological features of flowering and pollination promote success in hybridization of eugenol basil. The paper examines the ways of hybridization and features of castration and pollination of eugenol basil flowers.
E.A. Sirotyuk, O.A. Ostapenko
Ecological systematic review of the genus Juncus L. in the territory of the Adyghea Republic
An analysis is made of specific variety of the genus Juncus in flora of the Adyghea Republic, as well as of the origin, distribution and ecological-coenotic features of species. The adventive types and cosmopolitans, which are potentially capable to invasions in the territory of the Republic, are shown to occur among representatives of the genus in Adyghea. Rare species of sparts are noted: flat, mountain - forest and Alpine.
Anatomic features of an ear structure of grain cereal relatives
The paper gives the wild-growing species: the relatives of grain cereals occurring in the territory of the Adyghea Republic. As a result of studying ear joints of cultural cereals and their relatives, we have found the reasons of strong connection or an easy scattering of stem segments. Availability of powerful hypodermal tissue in floral scales (quantity of rows and thickness of a wall of cells) defines high filminess of a grain of barley. A study of an anatomic structure of an ear of wild types has shown the adaptive signs keeping them in the nature, but not being economically valuable to selection of cultural species.
Gene polymorphisms of the main proinflammatory IL-17A, TNF-a and IL-6 cytokines associated with risk of development of bronchial asthma in world populations and at inhabitants of the Adyghea Republic
Distribution of polymorphisms in promoter regions of genes of the main proinflammatory cytokines IL-17A (G197A, rs2275913), TNF-a (G308A, rs1800629) IL-6 (C174G, rs1800795) at inhabitants of the Adyghea Republic is statistically significant and does not differ from the average world values (Ensembl, 2012). Reliable distinctions between the surveyed groups of donors and patients with bronchial asthma are revealed on the basis of G197A gene IL-17A polymorphisms initiating and regulating production of «the first wave» mediators of proinflammatory TNF-a and IL-6 cytokines. The patients have statistically significantly increased frequency of «mutant» 197A allele of the IL-17A gene (χ2=6,980; OR=2,51) that allows us to consider it as associated with bronchial asthma by analogy with the results obtained for other populations. Associations of allele variants of genes of two proinflammatory TNF-α and IL-6 cytokines with chronic inflammatory diseases of lungs at inhabitants of the Adyghea Republic have not been revealed.
Historical dynamics of economic development and antropogenization of the nature of the Adyghea Republic
The paper provides an analysis of economic development and antropogenization of the territory of Adyghea. Seven stages of settling of the territory of Adyghea are allocated. The author defines the territorial and structural features of density of population of Adyghea in various time and provides the map «Periods of the Greatest Density of Population in the Adyghea Republic».
S.Yu. Deyko, A.A. Filobok
The theory, reasons and stages of development of the interethnic conflicts and specifics of Krasnodar Territory
The paper discusses the following problems: the influence of the interethnic conflicts on formation of national policy of Krasnodar Territory, the specific ethnostatus system which has developed in the territory of the region and border position of the territory as a part of Russia, etc.
T.B. Gaytova, Ya.M. Kashin, À.À. Belov
The modeling of the step-modulated inverter with the output voltage regulation when working on the photovoltaic modules. The calculation of the characteristics and the researching of work
This paper shows how to develop a model of the inverter of step modulation with output voltage regulation which includes the choice of power and the voltage conditions and the form of the curve of speed inverter output voltage. The authors compare the results of calculation of efficiency, transient weight and sizes with the current existing analogues. The results of work of the inverter model are given and compared with the design calculations.
A test module for the automated monitoring of level of mastering the academic subject «Electronics and Circuitry»
The paper examines the synthesis of the structural and thematic contents of the test module. The private and general criteria for level of mastering the academic subject are defined. Test tasks in the module are generated under the casual law within the thematic unit and consecutively for each didactic unit. Use of such automated modules allows us not only to intensify informative activity of trainees, but also to reveal their gaps in the most important and powerful structural units – didactic units of a training material, which realizes the requirement of completeness of mastering the training material.
Processing abnormal values of temporary row levels as a stage of information complex assessment in a subsystem of forecasting for the situational center
The paper discusses the methods of preliminary processing the temporary rows, considering existence of casual components of the abnormal value type. The author describes the algorithm of detection and elimination of such values, structure of a program application with the use of the specified algorithm and results of numerical experiments.
S.V. Goncharov, D.D. Yakuba, G.V. Yudenko
Research studies on fixing slide bearings in friction knot by using pinch fit
The paper deals with the definition of corrections for a method of calculation of pinch fits for a polymeric material on the basis of epoxy resin and cotton fabric, as well as with the determination of dependences of a press fitting effort on the size of a sample tightness in order to draw up recommendations about installation of slide bearings in friction knots.