Abstract:
Comparative analysis of case – means for effective formation of professional competence of Bachelor of Applied Computer Science and Business – Informatics.

Abstract:
The aim
of this work is to clarify the new mathematical model describing the mechanics
of continuous media and rarefied gas. The present study is associated with the
formulation of conservation laws as conditions of equilibrium of angular
momentums, while usually formulated in terms of balance of force. The equations
for gas are found from the modified Boltzmann equation and the phenomenological
theory. For a rigid body, the equations used the phenomenological theory, but
changed their interpretation. We elucidate the contribution of cross-effects in
the conservation laws of continuum mechanics, including the self-diffusion,
thermal diffusion, etc., which indicated S. Wallander. The paradox of Hilbert
in the solution of the Boltzmann equation by the Chapman-Enskog method was
resolved. Refined model of the boundary conditions for rarefied gas flows and
transient flow were near the moving surfaces. We establish conditions for the
existence of the A. N. Kolmogorov inertial range on the basis of the proposed
theory. Based on the theory, derivation of the Prandtl formula for boundary
layer was received. Delay in mechanics plays an important role on
commensurability of relaxation times and lateness. New accounting delay option
is proposed to consider the difference between the time derivative as a limit
and end values of the mean free path in a rarefied gas. The role of individual
time delay for each particle velocity and the average time is debated. The
Boltzmann equation is written with an additional term. This situation is
typical for discrete medium. The transition from discrete to continuous
environment is a key issue mechanics. Summary records of all effects lead to a
cumbersome system of equations and therefore require the selection of main
effects in a particular situation. The role of the time has similar problems in
quantum mechanics. Some examples are suggested.

Abstract:
This article surveys the results of studies of the process of differentiation of inflorescences of wintering buds of grapes of different varieties in the period of relative dormancy in the conditions of Taman

Abstract:
We consider two issues related to the condensation energy in superconductors described by the Eliashberg theory for various forms of the pairing interaction, associated either with phonon or electronic mechanisms of superconductivity. First, we derive a leading correction to the BCS formula for the condensation energy to first order in the coupling $\lambda$. Second, we show that at a given $\lambda$, the value of the condensation energy strongly depends on the functional form of the effective pairing interaction $\Gamma (\omega)$.

Abstract:
The process of dehydrogenation of methyl butenes to isoprene is conducted in the presence of iron oxide catalysts whose composition may include oxides of alkaline metals, alkaline earth metals, and transition metals. Catalysts of latest generation can also contain oxides of rare earth elements, particularly cerium oxide. However there is no any common opinion concerning its effect on catalytic properties of iron oxide catalysts. It is well known that ceric oxide has a positive effect on the quantity and stability of active centers and can play a critical role in a redox cycle of the dehydrogenation process. By means of differential thermal analysis, dispersion analysis and X-ray phase analysis, it was found in present study that introducing of ceric oxide promotes the decrease in hematite crystallite sizes. At the same time, it prevents potassium polyferrites formation, with the equilibrium of topochemical reaction between ferric oxide and po tassium carbonates moving predominantly to the formation of intermediate products–monoferrite systems, having greater catalytic activity. The increase in potassium monoferrite content results in dispersion of particles in the Fe_{2}O_{3}-K_{2}CO_{3}-СеО_{2} system that is accompanied by modification of texture characteristics. For this catalyst composition, the optimum concentration of ceric oxide (8.7 wt.%), leading to the formation of a certain ratio of mono- and polyferrite phases, was found. If more than 8.7 wt.% of СеО_{2} is introduced, the modification of texture characteristics of catalyst samples takes place, that negatively affects their selectivity.

Abstract:
The shell structure of nuclei with Z > 104 is studied with modified two-center shell model. Using macroscopic-microscopic approach, the mass excesses and Qα-values are calculated and compared with available experimental data. Our calculations reveal quite strong shell effects at Z = 120-126 as well as at N = 184. If our predictions for the heaviest nuclei are correct then one can expect the production of evaporation residues with Z ~ 120 in the reactions 50Ti+249Cf and 54Cr+248Cm with the cross sections 23 and 10 fb, respectively. Nuclei with Z = 120 and N = 178 – 182 are expected to have Qα about 11 MeV and life-time of 0.17 ms – 0.16 s.

Abstract:
The zero-divisor graph $\Gamma(R)$ of an associative ring $R$ is the graph whose vertices are all nonzero zero-divisors (one-sided and two-sided) of $R$, and two distinct vertices $x$ and $y$ are joined by an edge iff either $xy=0$ or $yx=0$. In the present paper, we give a full description of ring varieties where every finite ring is uniquely determined by its zero-divisor graph.

Abstract:
We address the issue whether the data on optical conductivity and Raman scattering in electron-doped cuprates below $T_c$ support the idea that the $d-$wave gap in these materials is non-monotonic along the Fermi surface. We calculate the conductivity and Raman intensity for elastic scattering, and find that a non-monotonic gap gives rise to several specific features in optical and Raman response functions. We argue that all these features are present in the experimental data on Nd$_{2-x}$Ce$_{x}$CuO$_4$ and Pr$_{2-x}$Ce$_{x}$CuO$_4$ compounds.

Abstract:
The organization of the compartment of mesenchymal stem cells is still obscure. Two types of human stromal precursor cells are known. Both of them are analyzed in in vitro system: mesenchymal multipotent stromal cells (MMSC) and fibroblast colony forming units (CFU-F). The aim of this study was to compare the main characteristics of MMSC and CFU-F derived from the bone marrow of 24 healthy donors. Growth and differentiation parameters, as well as relative expression levels of different genes were analyzed in MMSC and CFU-F. MMSC were cultivated for 5 passages. CFU-F concentration was determined for each bone marrow sample. The data obtained demonstrated the heterogeneity and hierarchical organization of both studied populations of stromal precursor cells-MMSC and CFU-F. These two types of stromal precursor cells turned to be different in most parameters studied. Altogether MMSC seemed to be more immature cells than CFU-F and took up the higher position in hierarchical tree of mesenchymal stem cells. The rate of differentiation and proliferative potential decreased with the donor’s age in both populations MMSC and CFU-F.

Abstract:
Aim of investigation is a study of a systolic intra- and interventricular dissynchronism expression in patients with a chronic cardiac insufficiency of the functional class II, III depending on a type of a postmyocardial infarction resimulation of the left ventricle with a use of a tissue doplerography.Materials and methods. 150 patients with a chronic cardiac insufficiency of the functional class II and III because of the ischemic heart disease (IHD) in all the patients are examined. The echocardiographic investigation with calculation of the left ventricle resimulation indices, the values characterizing its systolic function, several values assessing the left ventricle preloading, was made. A method of tissue doplerography in the impulse and wave mode was used for investigation of the intra- and interventricular dissynchronism.Conclusion. The intra- and interventricular systolic dissynchronism is intensified with an increase of the chronic cardiac insufficiency clinical manifestation gravity.