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The Bulletin of the Adyghe State University, the series “Natural-Mathematical and Technical Sciences” |
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#1 / 2012MathematicsV.B. Tlyachev, A.D. Ushkho, D.S. UshkhoParallel straight line isoclines of differential polynomial plane systems In the paper, the earlier obtained results [1] on a case of polynomials of any degree in the right-sided parts of the system are generalized.
Regression scale method for assessment of children's physical development Improved method is proposed to develop normative tables to assess the level of children's physical development on the basis of regression scales. For this a software package created by the author is used.
Application of regular representation of a integro-differential singularly perturbed system equations for their numerical solution In this paper we give a regular representation of a boundary value problem for a singularly perturbed Fredholm type integro-differential second order equation in the perturbed Fredholm type integral equation form. Two different successive approximation methods are determined. It is shown how the regular representation of singularly perturbed equations allows us to construct efficient methods for solving differential.
PhysicsS.E. BoychenkoPartial contributions of individual harmonics to the power of circular polarization synchrotron radiation The theoretical analysis is undertaken to determine the dependence of the partial contribution to the power of circular polarization synchrotron radiation upon number of a harmonic and velocity of a particle.
Distribution function and particle growth in condensed phases in the free-molecular regime The paper discusses a phenomenological theory of homogeneous condensation from a vapor phase at low supersaturations. The numerical solution of the obtained equations is compared with the analytic approximation.
Umov-Poynting vector for the electric and magnetic dipole moments This paper examines the properties of Umov-Poynting vector for the electromagnetic field of an arbitrary varying electric and magnetic dipole. It is shown that in the near zone, at distances comparable with the typical wave length, the direction of the energy flow vector is not radial. The derived formulae in the far zone asymp-totically approach the known expressions for dipole radiation. Special cases of linearly varying and precessing dipole moment are considered.
Particle trajectories of glass-forming materials upon receipt of glass blanks for optical fiber by vapor-phase deposition The particle trajectories of glass-forming materials have been obtained within the framework of the developed MCVD technique of fiber manufacturing. Precipitation features and temperature changes on the trajectories are analyzed for the mixed convective-thermophoretic mechanism.
Natural SciencesT.N. MelnikovaThe maximum runoff of rain high waters of the rivers in the North-West Caucasus The paper discusses the conditions of formation of the maximum runoff. The author shows elevation and longitudinal zoning of spatial distribution of the maximum runoff of rain high waters in the rivers of the North-West Caucasus for alternative ways of an estimation of maximum high-water runoff.
Forms of settling in territory of Adygheya A division into districts of modern settling in territory of Adygheya by its genesis has been conducted. The paper shows the origin and development of the forms of settling most typical for Adygheya. Using concrete examples illustrated with fragments of largescale maps, the author describes the interrelation between genesis of these forms and natural conditions.
Karyotype and chromosomal polymorphism Chironomus nuditarsis Str. (Keyl, 1962) (Chironomidae, Diptera) of the Central Caucasus The paper provides data on the karyofund features of populations Chironomus nuditarsis (Chironomidae, Diptera) from plains, foothills and mountains of the Central Caucasus (Kabardino-Balkarian Republic). We have found 11 banding sequences – two in the arms À (ndt A1, ndt A3), Â (ndt B1, ndt B2), F (ndt F1, ndt F2) and G (ndt G1, ndt G2) and one in the arms C, D and E – ndt C1, ndt D1, ndt E1. Ten of them have already been known, and one – ndt F2 (17f-m - 19a-g) is endemic, it is described for the species for the first time, but had previously been identified in Ch. plumosus.
Condition of cardiovascular system and neurophysiological status of students attending the football class The paper discusses mechanisms of regulator-adaptive possibilities of cardiovascular system of the students who attend the football class. Data on heart rate variability were used to determine the regulator-adaptive status of students. Three groups of students who attended the football class were revealed: with high degree of adaptation (47%), with pressure of regulator mechanisms (20%) and with unsatisfactory adaptation (33%). Features of the neurophysiological status are defined within each group.
Pathophysiological role and the prognostic importance of the angiotensinogen (AGT) gene M235T polymorphism at illnesses of a heart continuum An analysis is made of data of the international ethnogenetic researches carried out in 1995 through 2010 by frequency and association of M235T polymorphism of AGT in patients with risk of development of cardiovascular diseases using HuGENet data. In 12 % of the researches conducted in different ethnic populations, significant increase of frequency of ̀235̉ polymorphism of AGT in groups of patients with cardiovascular diseases is observed. This allows us to regard it as a prognostic significant criterion for risk of development of illnesses of a heart continuum. We consider it expedient to study distribution and associations of 235̉ polymorphism of AGT gene in groups of patients with cardiovascular diseases in different regions of the world taking into account ethnic features of surveyed contingents of the population.
Silver-polymetallic ores of Adygheya The paper provides a characteristic of various types of argentiferous polymetallic ores, their placing, history of study, age, structural-material features, parameters, assessment and prospects of further studying.
The possibility of using space research methods to assess the condition of forest ecosystems in mountain areas of Kabardino-Balkaria In this paper based on the literature analysis, the potentialities of modern satellite remote sensing systems are considered to carry out the environmental monitoring of forest ecosystems in mountain areas. The authors show an opportunity of using satellite images of Landsat 5 Thematic Mapper to determine the species composition, the area of forests and the availability of logging.
Biological features of a leaf of Spiraea specimen The paper provides the results of studying morphological features variability of the leaf of Spiraea L. specimen. It is established that the majority of the leaf features has high degree of variability; the greatest variation factor of the leaf size is at S. japonica `Macrophylla`. The results of research of epidermis and leaf stomata of Spiraea genus are given. The maximum general factor of features variation was observed at Spiraea x bumalda Pall., the average level of features variability at Spiraea alba Du Roi. and S. betulifolia Pall.
The generic and zoogeographical analysis of the fauna of scarab beetles (Scarabaeoidea, Coleoptera) in the Adygheya Republic The paper presents the results of generic analysis of fauna and areal data of beetle species of the superfamily Scarabaeoidea occurring in the territory of Adygheya. The generic analysis of Adygheya scarab beetle fauna allows the authors to allocate 77 genera belonging to 5 families and 121 species belonging to them, of which 3 species are marked for the first time in this study area. The Caucasian species make up 16% of the fauna under study.
Spatio-temporal differentiation of several ground beetle dominants (Coleoptera, Carabidae) in uplands of the North-West Caucasus The paper discusses peculiarities of the spatio-temporal distribution of 14 ground beetle species within the mountainous biocenoses mosaic of the North-West Caucasus.
A hydrometeorological study of the North-West Caucasus The paper provides an analysis of distribution of hydrological stations and the development of meteorological researches in the North-West Caucasus. An assessment is made of hydrometeorological study of the region in order to improve the monitoring studies of river runoff regimes in the region basins.
A description of settlements arrangement in the Adygheya territory The paper discusses typologies of Adygheya settlements created by their location and by the planning form. The author shows specific features of relationship between the genesis of the settlements and their position on the terrain and their lay-out.
The electromyographic characteristic of squats in powerlifting The electrobiological activity of muscles during squats with different weights in powerlifting is investigated on the basis of the interference surface electromyogram recording. The analysis of the electromyogram parameters is made by using the geometric modeling method.
Muscle activity when doing a backheel by highly-skilled female judoists The 2-D and 3-D video analysis was used to examine doing a backheel, one of the basic techniques in judo. Female judoists – members of the youth national team of the Russian Federation participated in experiment. It has been established that doing the backheel is accompanied by the greatest changes in relative length of muscle, as well as by the highest speed of contraction of the following muscles: right m. adductor longus, caput breve left m. biceps brachii, left and right m. biceps femoris, right m. latissimus dorsi, right m. obliquus externus abdominis, right m. rectus femoris, right m. sartorius, left and right m. gastrocnemius.
The electrobiological characteristic of the conductor's manual actions The paper examines the electrobiological activity of muscles during the implementation of conductor's professional motor skills by recording the interference surface electromyogram. The types of the EMG patterns, characteristic of manual actions of conductors are desalinated.
Prospects of forecasting ecologically significant natural hazards on the basis of structurally-similar geospace models Construction of the energy field topological structure, expressed in terms of gradients of structure parameters of geospace patterns, opens new prospects for monitoring and prediction of natural hazards and for creation of integrated geographic information systems (GIS).
Some aspects of people's awareness of foods produced from genetically modified organisms The paper provides a brief overview of the different points of view on foods produced from genetically modified organisms (GMO), on regulation of their production and on problems of people’s awareness of this food. The results of the author’s pilot interview on actual questions related to foods produced from GMO are considered. It was established that citizens of the region, despite their sufficient high education, are poor informed about foods produced from GMO. The author points to the key sources of information about foods from GMO and about their low efficiency. The advices to raise people’s awareness are given. Recommendations are aso given for the regional authorities concerning the transgenic products production and the creation of GMO free zones.
Technical SciencesYu.Kh. Guketlev, A.V. BeletskiyGraph-analytical model of regulation regional transport The paper provides a model of formation of optimum structure of a regional transport management based on a graph-analytical method. The model’s prospects are related to the analysis and a choice of priorities at formation of various schemes of regulation of the regional transport complex. The model can be used to make the comparative analysis of already functioning models of regulation and to choose the best among them. The model develops ideas of the cognitive approach at the solution of the poorly structured problems, developed at the Institute of Problems of Management of the Russian Academy of Sciences.
Identification of contours on low contrasting and blurred images using fractal filtration This paper describes a method for fast evaluation of the fractal dimension (the dimension of Minkowski). Algorithm is proposed for the identification of contours on low contrasting and blurred images using fractal filtration.
Increase of efficiency of vehicle braking on slippery roads The paper is dedicated to the questions of increasing efficiency of vehicle braking on slippery roads owing to strengthening of coupling properties of a wheel with a road covering. This is achieved by creation of short-term artificial increase in a roughness of a racetrack of the tire on all its length and of a road surface at emergency braking of a vehicle.
Construction of a vector field for modeling a spatiotemporal structure of the tectonic pressure field The paper presents the construction algorithm of a vector field with reference to spatiotemporal structure modeling of the tectonic pressure field. The grounds are given for choice of development tools. A description is made of structure of data required for a vector field realization on PC.
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