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Donets'k, Ukraine

Donetsk National Technical University is the biggest and oldest higher education establishment in Donbass, founded in 1921. It was originally located in Donetsk, Ukraine, but as a result of war in Donbass it was relocated to Krasnoarmiysk. In its early years, it was attended by Nikita Khrushchev. Wikipedia.


The equilibrium thermodynamic properties of simple liquids are described quantitatively using a statistical approach based on the model with a four-parametric oscillating interaction potential. The problem of selecting the constants of the initial potential for reproducing of the experimental pattern correctly is reduced to determining a single variable parameter. Asymptotically exact concepts are obtained for the inter-particle potential and for thermodynamic functions, which depend only on this parameter (the optimal value of this parameter is used for calculating the properties of the model on the phase-equilibrium line and in the supercritical region). The results of calculations are compared with experimental data and the results of the models with two-constant equations of state of the cubic type. © 2015, Pleiades Publishing, Ltd. Source


Gutarevych V.,Donetsk National Technical University
Transport Problems | Year: 2012

The mathematical model of suspended monorail track with allowance for elastic strain which occurs during movement of the monorail carriage was developed. Standard forms for single span and double span of suspended monorail sections were established. Source


Galiakhmetov A.M.,Donetsk National Technical University
Classical and Quantum Gravity | Year: 2010

Exact general solutions to the Einstein-Cartan equations are obtained for spatially flat isotropic and homogeneous cosmologies with a nonminimally coupled scalar field. It is shown that both singular and nonsingular models are possible. Exact general solutions of an analogous problem in the torsion-less case are derived. The role of torsion in the evolution of models is elucidated. © 2010 IOP Publishing Ltd. Source


Galiakhmetov A.M.,Donetsk National Technical University
International Journal of Theoretical Physics | Year: 2013

Flat Friedmann universes filled by radiation, stiff fluid and a nonminimally coupled ghost scalar field with polynomial potentials of the fourth degree V(Φ) are investigated in the framework of the Einstein-Cartan theory. Exact solutions are obtained and analyzed for an arbitrary coupling constant ξ. It is shown that both singular and bouncing models with the late-time accelerated expansion are possible. A comparative analysis of the cosmological models with and without stiff fluid is carried out. The role of sources in the evolution of models is elucidated. Some conclusions from comparison of the presented results with other approaches in literature for accelerated expansion are made. © 2012 Springer Science+Business Media New York. Source


Galiakhmetov A.M.,Donetsk National Technical University
General Relativity and Gravitation | Year: 2013

Exact general solutions for spatially flat isotropic and homogeneous cosmologies with a nonminimally coupled ghost scalar field that has polynomial potentials of the fourth degree are obtained in the framework of the Einstein-Cartan theory (ECT) and general relativity (GR). The special values of coupling constant ξ and restrictions on ξ are found for the above solutions. Some effects of torsion and scalar field potential are elucidated. It is shown that solutions can describe the bouncing models with the late-time accelerated expansion. It is demonstrated that some models admit the unified scenario for dark matter and dark energy: (i) both singular models in ECT with a de Sitter-like asymptotic and with the power-law (t4/3) asymptotic at late times, (ii) singular and nonsingular models in GR with a de Sitter-like asymptotic at late times. © 2012 Springer Science+Business Media New York. Source

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