Shinbayeva A.,Al-Farabi Kazakh National University |
Arkharov I.,Moscow State Technical University |
Aldiyarov A.,Al-Farabi Kazakh National University |
Drobyshev A.,Al-Farabi Kazakh National University |
And 2 more authors.
Journal of Low Temperature Physics | Year: 2017
The cryogenic technologies of processing and storage of agricultural products are becoming increasingly indispensable in the food industry as an important factor of ensuring food safety. One of such technologies is the shock freezing of meat, which provides a higher degree of preservation of the quality of frozen products in comparison with traditional technologies. The thermal conductivity of meat is an important parameter influencing the energy consumption in the freezing process. This paper presents the results of an experimental investigation of the temperature dependence of the thermal conductivity of beef. The measurements were taken by using a specially designed measurement cell, which allows covering the temperature range from 80 to 300 K. © 2017, Springer Science+Business Media New York.
Sergeyev D.M.,Aktobe Regional State University |
Sergeyev D.M.,Military Institute of Air Defense Forces
Russian Physics Journal | Year: 2016
A modified expression for the Andreev reflection coefficient is derived taking into account strong electronphonon interactions. A dependence of the superconducting order parameter ∆σ is numerically modeled for magnesium diboride. The current-voltage characteristics and the dI/dV spectra of the dynamic conductivity of superconductor-normal metal-superconductor (SNS) contacts based on strongly coupled superconductors are calculated for the Averin–Bardas model using the modified Andreev reflection coefficient (on an example of magnesium diboride). Calculations are performed for the mode of high transparency (0.9–0.98). The special features of the SNS contacts based on strongly coupled superconductors are shown. © 2016 Springer Science+Business Media New York
Spivak-Lavrov I.,Aktobe Regional State University
Advances in Imaging and Electron Physics | Year: 2015
In the present work the numerical and analytical methods of research of the corpuscular and optical systems (COS) allowing to carry out calculation of wide beams of charged particles have been developed. The differential equations describing the deflection of particles of a beam from an axial trajectory for any COS whose axial trajectory possesses torsion, and also for the COS having the mean plane with a flat axial trajectory have been received. When carrying out calculations these equations are integrated numerically together with the differential equations for an axial trajectory, which allows to receive high accuracy of calculations. Also general focusing and dispersive properties of the COS possessing the mean plane have been investigated. For calculation of COS of reflex type Newton's dimensionless equations are used.Analytical expressions for potentials describing electric and magnetic fields of various COS, including COS with transaxial and axial symmetry, have been received by methods of the theory of functions of a complex variable. The work also develops an original method of calculation of trajectories of charged particles movement in fringe fields of flat and cylindrical condensers.By means of the developed methods calculation of instrument characteristics of new schemes of static and the time-of-flight mass analyzers has been carried out.Thus, the work shows the fruitfulness of an adequate combination of analytical and numerical methods for the solution of problems of optics of charged particles. © 2016 Elsevier Inc.
Seitenova S.S.,Aktobe Regional State University
Life Science Journal | Year: 2014
In this article ideas of scientist-psychologist concerning the development of the Kazakh language by method of communicative orientation and psychological factors influencing the teaching methods are considered (memory, speech, thinking, perception, understanding, need etc.) Also it is important to control psychological features and psychological factors of the student during language development in compliance with specialties and individual ability, sane consciousnesses of the student are considered,. The main psychological basis means that during studying of the Kazakh language, to affect to consciousness and feeling of the student and to explain importance of the subject, to form the correct look on a subject.
Absatova M.,Kazakh National Pedagogical University |
Ussenova A.,Kazakh National Pedagogical University |
Seitenova S.,Aktobe Regional State University |
Nurpeissov T.,Lb Goncharov Kazakh Road Academy
International Journal of Environmental and Science Education | Year: 2016
The article describes the main approaches to the problem of social success of the individual. Analysis of scientific psychological and pedagogical literature showed that Modern life requires individuals, not only in business and organizational qualities, but also the ability to navigate in a changing environment, ability to communicate, collaborate, ability to make a career - to be a successful person. The authors have constructed a methodological system of studying of the given problem, on the basis of generalization of experience of development of social success of the individual, which is based on the principles of personality-developing education, subjectivity, socio-cultural conformity of education, based on the motivations and abilities of the individual, finds its content in the forms of education and upbringing of such author's “framework for the development of social success of the Individual, special course”, “Club success”, “Path to Profitability” festival of pedagogical ideas, Web the page “School socially successful person” on the website of the University. © 2016, IJESE. All Rights Reserved.
Aldashev S.A.,Aktobe Regional State University
Mathematical Problems in Engineering | Year: 2010
In the theory of hyperbolic PDEs, the boundary-value problems with conditions on the entire boundary of the domain serve typically as the examples of the ill-posedness. The paper shows the unique solvability of the Dirichlet problem in the cylindric domain for the multidimensional wave equation. We also establish the criterion for the unique solvability of the equation. © 2010 Serik A. Aldashev.
Sergeyev D.,Aktobe Regional State University |
Shunkeyev K.,Aktobe Regional State University
2016 International Siberian Conference on Control and Communications, SIBCON 2016 - Proceedings | Year: 2016
In the framework of the model of multiple Andreev reflections of quasiparticles (Averin-Bardas model) the current-voltage characteristics and the dI/dV-spectra of dynamic conductivity of ballistic contacts superconductor - normal metal - superconductor (SNS) in high transparency mode (for D = 0,9÷0,98) were calculated. In this mode the energy gap of superconductors comprising SNS-contact is oscillatory in the energy range 60÷100 meV due to the strong electron-phonon interaction. The features of subharmonic gap structures are revealed in the considered contacts at voltages V4 = 2Δ/4e, VS=2Δ/5e, V6=2Δ/6e and V7=2Δ/7e as transforming minimums into maximums at the increase of transparency coefficient from 0,9 to 0,98 (or reduction of the barrier height from 0,33 to 0,144). The results satisfactorily correlate with experimental data. © 2016 IEEE.
Aldashev G.,University of Namur |
Aldashev G.,Free University of Colombia |
Aldashev S.A.,Aktobe Regional State University
Mathematical Problems in Engineering | Year: 2012
Inverse problems for hyperbolic equations are found in geophysical prospecting and seismology, and their multidimensional analogues are especially important for applied work. However, whereas results have been established for the some narrow classes of hyperbolic equations, no results exist for more general classes. This paper proves the solvability of the inverse problem for a general class of multidimensional hyperbolic equations. Our approach consists of properly choosing the shape of the overidentifying condition that is needed to determine the right-hand side of the hyperbolic PDE and then applying the Fourier series method. We are then able to establish the results of the existence of solution for the cases when the unknown right-hand side is time- independent or space independent. Copyright © 2012 Gani Aldashev and Serik A. Aldashev.
Kelevedjiev P.,Technical University of Sofia |
Popivanov N.,Sofia University |
Bekesheva L.,Aktobe Regional State University
AIP Conference Proceedings | Year: 2014
Using the Topological transversality theorem and the barrier strips technique, we study the solvability of the initial value problem x″ = f(t,x,x′),x(0) = A,x′(0)=B, where the scalar function f(t,x,p) may be unbounded as p→B. Obtained results guarantee the existence of at least one solution in C1[0,T]∪C2(0,T]. Under additional assumptions it is monotone and does not change its sign. © 2014 AIP Publishing LLC.
Abdikalikova G.,Aktobe Regional State University |
Berzhanov A.,Aktobe Regional State University
AIP Conference Proceedings | Year: 2014
In this article we research existence and uniqueness of multiperiodicity and almost periodicity of variable part of the solutions of boundary value problem for system of parabolic type equation. © 2014 AIP Publishing LLC.