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Imeni Vladimira Il'icha Lenina, Russia

Tomsk State University of Control Systems and Radioelectronics is a public university in Tomsk, Russia.Founded in 1962, TUSUR University was formed when two faculties, the Faculty of Radio Engineering and the Faculty of Electric Radio Control, split from Tomsk Polytechnic University to create a new educational institution.The mission of TUSUR as an entrepreneurial research university is “to create cultural, educational, research and innovative environment, ensuring achievement of success by alumni whose labor and knowledge guarantee that high technologies serve the country, society and the world”.TUSUR is recognized nationally as one of the leading engineering universities in Russia. It carries out extensive basic and applied research in the area of its expertise and maintains close links to the industry, making it one of the highest-performing research universities in the country. Wikipedia.


Starikov V.I.,Tomsk State University of Control Systems and Radioelectronics
Optics and Spectroscopy (English translation of Optika i Spektroskopiya) | Year: 2012

In the model of parabolic trajectories, expressions are derived for the bi-resonance functions that appear in the theory of collisional broadening of molecular spectral lines in the case of their interference. The functions required for calculating the cross-relaxation parameters of molecular spectral lines in the case of their broadening by rare gas atoms are obtained numerically in the model of exact trajectories for the isotropic Lennard-Jones 6-12 potential. Analytic models are proposed for these functions, and the corresponding parameters are obtained. © Pleiades Publishing, Ltd., 2012. Source


Starikov V.I.,Tomsk State University of Control Systems and Radioelectronics
Optics and Spectroscopy (English translation of Optika i Spektroskopiya) | Year: 2013

Broadening coefficients γ and interference coefficients ξ are calculated for different bands of the ammonia molecule in the case of line broadening by the pressure of argon and helium. A model intermolecular potential is used. It is shown that taking into account the interference effect changes the calculated values of γ, which suggests that the model potential parameters should be redetermined. The vibrational dependence of coefficients ξ is analyzed, and they are compared to coefficients ξ calculated for the same lines of the ammonia molecule pressure broadened by H2, O 2, N2, and NH3. © 2013 Pleiades Publishing, Ltd. Source


Oikonomou V.K.,Tomsk State University of Control Systems and Radioelectronics
International Journal of Geometric Methods in Modern Physics | Year: 2016

We investigate how the gravitational baryogenesis mechanism can potentially constrain the form of a Type IV singularity. Specifically, we study two different models with interesting phenomenology, that realize two distinct Type IV singularities, one occurring at the end of inflation and one during the radiation domination era or during the matter domination era. As we demonstrate, the Type IV singularities occurring at the matter domination era or during the radiation domination era are constrained by the gravitational baryogenesis, in such a way so that these do not render the baryon to entropy ratio singular. Both the cosmological models we study cannot be realized in the context of ordinary Einstein-Hilbert gravity, and hence our work can only be realized in the context of F(R) gravity and more generally in the context of modified gravity only. © 2016 World Scientific Publishing Company. Source


Oikonomou V.K.,Tomsk State University of Control Systems and Radioelectronics
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2015

We study how a cosmological bounce, with a type IV singularity at the bouncing point, can be generated by a classical vacuum F(G) gravity. We focus our investigation on the behavior of the vacuum F(G) theory near the type IV singular bouncing point and address the stability of the resulting solution by treating the equations of motion as a dynamical system. In addition, we investigate how the scalar perturbations of the background metric evolve, emphasizing cosmological times near the type IV singular bouncing point. Finally, we also investigate which mimetic vacuum F(G) gravity can describe the singular bounce cosmology. © 2015 American Physical Society. Source


Oikonomou V.K.,Aristotle University of Thessaloniki | Oikonomou V.K.,Tomsk State University of Control Systems and Radioelectronics
General Relativity and Gravitation | Year: 2015

Using the reconstruction technique with an auxiliary field, we investigate which F(R) gravities can produce the matter bounce cosmological solutions. Owing to the specific functional form of the matter bounce Hubble parameter, the reconstruction technique leads, after some simplifications, to the same Hubble parameter as in the matter bounce scenario. Focusing the study to the large and small cosmic time t limits, we were able to find which F(R) gravities can generate the matter bounce Hubble parameter. In the case of small cosmic time limit, which corresponds to large curvature values, the F(R) gravity is F(R)∼R+αR2, which is an inflation generating gravity, and at small curvature, or equivalently, large cosmic time, the F(R) gravity generating the corresponding limit of the matter bounce Hubble parameter, is F(R)∼1R, a gravity known to produce late-time acceleration. Thus we have the physically appealing picture in which a Jordan frame F(R) gravity that imitates the matter bounce solution at large and small curvatures, can generate Starobinsky inflation and late-time acceleration. Moreover, the scale factor corresponding to the reconstruction technique coincides almost completely to the matter bounce scenario scale factor, when considered in the aforementioned limiting curvature cases. This is scrutinized in detail, in order to examine the validity of the reconstruction method in these limiting cases, and according to our analysis, exact agreement is achieved. © 2015, Springer Science+Business Media New York. Source

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