Vol 19, No 3 (2013)

Articles

ASYMPTOTIC EXPANSIONS OF SOLUTIONS FOR HIV EVOLUTION MODEL

Archibasov A.

Abstract

In the paper the mathematical model of HIV evolution is considered. This model is a singularly perturbed partial integro-differential equations system. Based on the Tikhonov—Vasilieva method of boundary function the first approximation of the system solutions is realized.
Vestnik of Samara University. Natural Science Series. 2013;19(3):5-11
pages 5-11 views

ESTIMATION OF DELAYED LOSS OF STABILITY IN DIFFERENTIAL EQUATIONS WITH CANARDS

Golodova E., Shchepakina E.

Abstract

The paper is devoted to the investigation of phenomenon of delayed loss of stability in singularly perturbed systems of ordinary differential equations. The estimation for delayed loss of stability is obtained for the differential system with a canard. The problem of maximal temperature of safe combustion determination is considered as an illustration for the obtained mathematical result.
Vestnik of Samara University. Natural Science Series. 2013;19(3):12-24
pages 12-24 views

ON SOME PROPERTIES OF J -ANALYTICAL FUNCTIONS

Nikolaev V.

Abstract

The properties of 2-vector-valued functions analytic in Douglis are studied. Three auxiliary theorems, on the basis of which the general algorithm of constructing examples of not-uniqueness homogeneous problem of Schwartz in the form of quadratic forms is reduced to are proved.
Vestnik of Samara University. Natural Science Series. 2013;19(3):25-32
pages 25-32 views

DIFFERENCE-DIFFERENCIAL GAME OF APPROACH AND EVASION IN HILBERT SPACE, I

Pasikov V.

Abstract

In this paper the dynamic guidance-to-the-functional set game for conflict controlled differential system with time delay is studied. Fulfillment of conditions of saddle point relative to the right side of the system is not supposed to be. The proof is based on Hilbert space norm.
Vestnik of Samara University. Natural Science Series. 2013;19(3):33-41
pages 33-41 views

EXPONENTS OF SOME VARIETIES OF LEIBNIZ — POISSON ALGEBRAS

Ratseev S., Cherevatenko O.

Abstract

In the paper equivalent conditions for the estimation of growth of varieties of Leibniz — Poisson algebras with nilpotent commutant are received.
Vestnik of Samara University. Natural Science Series. 2013;19(3):42-52
pages 42-52 views

THE THEOREM OF AVERAGING IN THE CONDITION OF UNLIMETED SPEED FOR ALMOST-PERIODIC FUNCTIONS

Filatov O.

Abstract

It is proved that the limit of maximal mean is an independent variable of initial conditions if an axis exists from the convex hull of a set of permitted speeds out of a finite-dimensional space and the components of direction vector of the axis are the independent variables with respect to a spectrum of almost-periodic function. The set of permitted speeds is the right hand of differential inclusion. The limit of maximal mean is taken over all solutions of the Couchy problem for the differential inclusion.
Vestnik of Samara University. Natural Science Series. 2013;19(3):53-57
pages 53-57 views

THE DYNAMICS OF TOWAGE BY THE ELASTIC ROPE IN A GRAVITATIONLESS SPACE

Aslanov V., Yudintsev V.

Abstract

The dynamics of the rigid body connected with the space tug by the elastic rope in a gravitationless space is considered. The equations of motion are derived from a Lagrange formalism. The influence of initial conditions on the rigid body behaviour is studied. The posibility of existence of critical behaviour of movement which can cause the entanglement of rope is shown.
Vestnik of Samara University. Natural Science Series. 2013;19(3):58-66
pages 58-66 views

SYSTEM CREATING OF HYBRID METHODS OF MATHEMATICAL MODELING OF DIFFICULT ELECTRODYNAMICS SYSTEMS

Buzova M., Bukashkin S., Minkin M.

Abstract

In this paper, we demonstrate key problems of constructing a system of hybrid methods for mathematical modeling of complicated electrodynamics systems. The problem is posed and the main hybrid methods of mathematical modeling are given.
Vestnik of Samara University. Natural Science Series. 2013;19(3):67-74
pages 67-74 views

SPECTRAL INVESTIGATIONS OF NANOCOMPOSITES ON THE BASIS OF POROUS SILICON

Berlova E., Zhukova V., Latukhina N., Pisarenko G.

Abstract

The results of experimental studies of porous silicon nanocomposites with biological materials: powder mineral phase of bone (hydroxyapatite) and biochemical solution identical to the natural tear fluid are presented in the work. Layers of porous silicon have been obtained in the process of electrochemical etching silicon wafers. There have been studies of IR reflection spectra of samples of nanocomposites in the range 4000-550 cm-1 produced.
Vestnik of Samara University. Natural Science Series. 2013;19(3):75-84
pages 75-84 views

THE MODEL OF SCATTERING OF NEUTRAL QUANTUM PARTICLE ON A NON-STATIONARY CURVE

Vedutenko E., Talalov S.

Abstract

The model describing the scattering of neutral quantum massive particle on the evolving curve has been constructed by methods of non-relativistic scattering theory. The first "dynamical" correction for scattering wave function has been calculated for the case of small non-stationary perturbation of straight line.
Vestnik of Samara University. Natural Science Series. 2013;19(3):85-89
pages 85-89 views

POINT SPREAD FUNCTION OF FOUR-WAVE RADIATION CONVERTER ON THE KERR NONLINEARITY UNDER QUASIPERPENDICULAR INTERACTION

Ivakhnik V., Kaurov A., Nikonov V.

Abstract

Accuracy of conversion of radiation by degenerate four-wave-converter on the Kerr nonlinearity under quasiperpendicular interaction geometry was analyzed with the use of point spread function method. The increasing of accuracy of radiation conversion by such converter compared to the same converter with quasicollinear geometry interaction. Correlation between the half-width module of point spread function and divergence of the pump wave, position of the focusing plane of signal wave, shear wave propagation direction with respect to the pump face of the nonlinear layer were obtained.
Vestnik of Samara University. Natural Science Series. 2013;19(3):90-96
pages 90-96 views

MODELING OF INFLUENCE OF THERMAL SPACE FACTORS ON OPTICAL CHARACTERISTICS OF LENS TELESCOPE OF SPACECRAFT

Tsaplin S., Bolychev S.

Abstract

The software based on software packages ANSYS, MathCAD, Zemax is developed to study the effects of thermal factors of space on the optical characteristics of spacecraft lens telescope. The calculation of time-dependent temperature and strain fields, the output parameters of optical system is carried out.
Vestnik of Samara University. Natural Science Series. 2013;19(3):97-106
pages 97-106 views

MECHANISMS OF DEGRADATION OF ELECTROPHYSICAL CHARACTERISTICS OF MOS-STRUCTURES WITH HIGH-K DIELECTRICS

Shalimova M., Afanaskov V., Khavdey E.

Abstract

Results of study of the processes of change of electrophysical characteristics are presented at various operating modes of MOS-structures and the analysis of the most probable mechanisms of degradation of structures was spent. The gate dielectric was made from rare-earth oxides (high-k dielectrics). The estimation of influence of electric field and temperature on change of a charge of investigated structures was spent, the value of energetically density of states on the interface dielectric — semiconductor was defined.
Vestnik of Samara University. Natural Science Series. 2013;19(3):107-119
pages 107-119 views

SIMULATION OF TWO-DIMENSIONAL ONE-PHASE TRACER FLOW WITH THE USE OF CHROMATOGRAPHIC PLATE THEORY

Kudryashov S., Onuchak L., Panarin D.

Abstract

Generalization of chromatographic plate theory in case of two-dimensional non-sorbing tracer flow in a homogeneous porous media of uniform thickness with equal debit injection and producing wells are considered. It is shown that in this approach approximate calculation of tracer concentration at different times in producing well, and at a fixed time at various porous media points can be carried out.
Vestnik of Samara University. Natural Science Series. 2013;19(3):120-127
pages 120-127 views

OIL IDENTIFICATION ON SET OF PHYSICAL AND CHEMICAL INDICATORS OF QUALITY

Lobachev A., Fomina N., Lobacheva I., Revinskaya E.

Abstract

Approaches to identification of materials, based on component-wise analysis that is applicable only to rather simple materials, when probably complete division and further identification of individual components of a mix are shined. The system of identification of oil on the basis of determination of set of physical and chemical indicators of quality of oil according to GOST 51851-2002 is offered.
Vestnik of Samara University. Natural Science Series. 2013;19(3):128-133
pages 128-133 views

SYNTHESIS OF SOME AZOLIDES OF 2-PHTHALIMIDOETHANESULFONIC ACID

Purygin P., Yudakhina T.

Abstract

New azolides of 2-phthalimidoethanesulfonic acid (imidazolide, 2-methylimidazolide, 2-isopropylimidazolide, 4-methylimidazolide, benzimidazolide, 1,2,4-triazolide) to research their biological activity and reactivity were synthesized with the aim of their future study.
Vestnik of Samara University. Natural Science Series. 2013;19(3):134-139
pages 134-139 views

SYNTHESIS AND STUDY OF STRUCTURE OF IMIDAZOLIDES OF 1-ADAMANTANEACETIC ACID

Sklyuev P., Zarubin Y., Purygin P., Konstantinov A.

Abstract

The methods of synthesis of imidazolides of 1-adamantanacetic acid were designed. The relation of hydrolytic stability and structure was studied in theory. The way of synthesis process and its possible realizations are discussed in this work. A range of physical and chemical and spectral properties was studied. The physical and chemical relations of sorption, synthesized by imidazole adamantane derivatives using the high performance liquid chromatography, were described.
Vestnik of Samara University. Natural Science Series. 2013;19(3):140-145
pages 140-145 views

THE PROPERTIES OF SPIKE ACTIVITY OF NEURONS OF SUPRACHIASMATIC NUCLEUS

Inyushkin A., Mistryugov K.

Abstract

On rat hypothalamic slices, the properties of spike activity of neurons of suprachiasmatic nucleus are investigated. Four different types of activity are identified: regular, irregular, bursting and low. The possible mechanisms of generation of mentioned types of activity are discussed.
Vestnik of Samara University. Natural Science Series. 2013;19(3):146-153
pages 146-153 views

CRUSTACEA OF THE POND OF TOMASHEV KOLOK IN THE SAMARA CITY

Kireev A., Gerasimov Y.

Abstract

The species composition and seasonal dynamics of quantity of Crustacean populations in small urban pond is studied. The list of 15 Crustacean species is presented. Daphnia longispina, Ceriodaphnia reticulata and Cyclops copepodits dominate in the first half of summer to July, Chydorus sphaericus dominate in August and September.
Vestnik of Samara University. Natural Science Series. 2013;19(3):154-160
pages 154-160 views

TO THE INVESTIGATION OF UST-SOKSKIY QUARRY FLORA

Makarova Y., Kulikova M., Prokhorova N., Golovlyov A.

Abstract

Выявлено произрастание 96 видов сосудистых растений, принадлежащих к 75 родам, 33 семействам, 5 классам и 4 отделам. Дан таксономический, биоморфологический, экологический и фитоценотический анализ флоры сосудистых растений Усть-Сокского карьера Самарской области
Vestnik of Samara University. Natural Science Series. 2013;19(3):161-167
pages 161-167 views

DYNAMICS OF FUNCTIONAL INTERHEMISPHERIC ASYMMETRY AND PARTICULARITIES OF VARIABILITY OF THE CARDIAC RHYTHM IN CHILDREN OF 7-8 YEARS IN THE INFORMATION LOAD

Paramonova M., Vedyasova O., Lukina A., Karpova E.

Abstract

During the information loading in children, the changes of coefficient of functional asymmetry, reflecting strengthening role of left hemisphere in realization of mental activity in the age of 7 to 8 years are revealed. At the same time, shifts of diagnostic parameters of variability of cardiac rhythm depending on age, sex and direction of changes in coefficient of asymmetry are found. Most pronounced changes were found in indexes of activity of sympathetic and parasympathetic nervous system, thus more noticeable change by sympathetic nervous system at loading was observed in girls of the first class, and parasympathetic — in boys of the second class. Dependence of changes of coefficient of functional asymmetry at loading of reference values is established in sympathetic nervous system and Bayevsky index at right-handed persons of 8 years.
Vestnik of Samara University. Natural Science Series. 2013;19(3):168-176
pages 168-176 views

THE EFFECTS OF SOMATOSTATIN MICROINJECTIONS INTO THE SOLITARY TRACT NUCLEUS ON HERING — BREUER REFLEX

Petryashin I.

Abstract

In the paper, the data concerning the effects of somatostatin microinjections into the solitary tract nucleus on Hering — Breuer reflex are presented. We found a stimulatory effect of somatostatin on the reflex by an increase of normalized expiratory duration. Thus, modulation of Hering-Breuer reflex is appeared to be a possible mechanism of somatostatin action at the level of dorsal respiratory group.
Vestnik of Samara University. Natural Science Series. 2013;19(3):177-182
pages 177-182 views

ROLE OF ROSTRAL PART OF AMYGDALA COMPLEX IN THE ORGANIZATION OF BEHAVIOR OF FEMALE RATS

Romanova I., Dzhanoyan A., Zainulin R.

Abstract

In chronic experiments on adult female rats we found that the rostral part of amygdala is involved in the organization of motor, research activity of animals, as well as in learning.
Vestnik of Samara University. Natural Science Series. 2013;19(3):183-187
pages 183-187 views

THE NEW FOR SAMARA AREA SPECIES OF LEPIDOPTERA.4-th REPORT

Sachkov S.

Abstract

In the article sixty one species of Lepidoptera new for the Samara Region are noted and three species are deleted.
Vestnik of Samara University. Natural Science Series. 2013;19(3):188-199
pages 188-199 views

A COMPARATIVE ANALYSIS OF CHANGES IN PHYSIOLOGICAL AND BIOCHEMICAL PARAMETERS OF HETEROSEXUAL AND DIFFERENT AGES OF SCHOOL CHILDREN WORKING IN COMPUTER'S CONDITIONS

Sokotun S., Korchikov E.

Abstract

Changes of physiological and biochemical parameters of schoolchildren working behind a computer are investigated. The comparative analysis of changes of these parameters from heterosexual and different schoolchildren age was given. The results testifying to functional shifts of adaptable systems of an organism at sixth- and eight- graders at work behind a liquid crystal monitors of a computer are received.
Vestnik of Samara University. Natural Science Series. 2013;19(3):200-205
pages 200-205 views

DESIGN OF AUTOMATED SOLUTION CHECK SYSTEM FOR PROGRAMMING CONTESTS

Rusakova M., Meerson R.

Abstract

The paper deals with design of automated solution check system for regional programming contests. The requirements and constraints for such systems are found in the work. Database for contest tasks is designed. The system is constructed using object modeling and patterns concept. Unified modeling language is used for system design. UML-diagrams are shown for project classes as well as diagram for solution check process.
Vestnik of Samara University. Natural Science Series. 2013;19(3):206-218
pages 206-218 views

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