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Saratov, Russia

Saratov State Technical University , located in Saratov, is one of the leading technical universities in Russia.СГТУ currently enrolls 26,466 students. Of these students, 15,115 are full-time, 1554 are evening, and 9723 are part-time. In 2005, the first year only enrolled 1,478 students. Currently the university employs 1,175 teachers, including 200 professors and doctors, and 590 assistant professors and Ph.D. candidates. More than 60 teachers are active members or corresponding members of different social academies of Russia. Wikipedia.

Sysoev I.V.,Chernyshevsky Saratov State University | Sysoeva M.V.,Saratov State Technical University
Physica D: Nonlinear Phenomena | Year: 2015

The ability of the Granger causality method to detect directed coupling between subsystems of a complex system in a moving time window is investigated on etalon oscillators. In particular, the time series consisting of alternate stationary regimes characterised by the different amplitude and shape of oscillations with fast transient processes between these regimes are considered, with similar transitions being possible due to changes either in the coupling or in the individual properties of subsystems. Two popular approaches to surrogate times series generation are used to check the significance of the method results. Two model structures: the standard linear and the special non-linear adapted to data are implemented. The Granger causality method using the model structure adapted to data is shown to be significantly advantageous in detecting coupling directionality and the instant time of the regime change than the standard linear method, while in some cases the sensitivity and the specificity of the adapted approach are insufficient. © 2015 Elsevier B.V. All rights reserved. Source

Plotnikov P.K.,Saratov State Technical University
Mechanics of Solids | Year: 2013

A model of sliding and spinning friction forces for a ball in the form of finite relations obtained by integrating the tangential stresses over the contact area whose parameters are determined by Hertz's theory for the "ball-rough horizontal surface" tribological conjunction pair is supplemented with a model of rolling friction torques. The combined model is peculiar in that the presliding displacement effect in rolling and spinning friction torques is taken into account. It is shown that the ball motions in the presliding displacement zone are of quasilinear character and, under shock perturbations, have the form of damping vibrations in the three orientation angles. The numerical parameters of the rolling and spinning friction model are experimentally determined for the presliding displacement zones, while the sliding friction parameters and partly the spinning friction parameters are calculated. Mathematical modeling permits one to discover new properties of the ball, namely, its deceleration in rolling, the onset of damping vibrations at the beginning and end of motion, and the transient process parameters. © 2013 Allerton Press, Inc. Source

Nefedov I.S.,Aalto University | Melnikov L.A.,Saratov State Technical University
Applied Physics Letters | Year: 2014

We demonstrate the production of strong directive thermal emissions in the far-field zone of asymmetric hyperbolic metamaterials (AHMs), exceeding that predicted by Planck's limit. Asymmetry is inherent to the uniaxial medium, where the optical axis is tilted with respect to medium interfaces. The use of AHMs is shown to enhance the free-space coupling efficiency of thermally radiated waves, resulting in Super-Planckian far-field thermal emission in certain directions. This effect is impossible in usual hyperbolic materials because emission of high density of states (DOS) photons into vacuum with smaller DOS is preserved by the total internal reflection. Different plasmonic metamaterials are proposed for realizing AHM media; the thermal emission from a AHM, based on a grapheme multilayer structure, is presented, as an example. © 2014 AIP Publishing LLC. Source

Tseluikin V.N.,Saratov State Technical University
Nanotechnologies in Russia | Year: 2014

Results of studies of composite coatings modified with nanoparticles are described. The focus is on metal coatings prepared by cathodic deposition from electrolyte suspensions. The effect of different nanoparticles (nanodiamonds, fullerenes, carbon nanotubes, carbides, oxides, etc.) on the performance properties (microhardness, wear resistance, corrosion stability, etc.) and structure of the composite coatings is examined. © 2014 Pleiades Publishing, Ltd. Source

Salmenniemi S.,University of Turku | Vorona M.,Saratov State Technical University
British Journal of Sociology | Year: 2014

Self-help has become a booming business over the past decades and an increasingly visible part of popular media culture worldwide. The paper analyzes the arrival and effects of this cultural technology in post-Soviet Russia after more than seventy years of socialism. It examines how Russians are engaging with popular psychology self-help as a technology of the self and how they are making it meaningful in their lives. Drawing on a set of one-to-one and focus group interviews conducted with self-help readers, it examines how these individuals negotiate the new ethics and the normative models of personhood put forward by the self-help genre. It argues that popular psychology has offered a new language for making sense of the self and the social world, and highlights how the readers critically engage with the normalizing power of popular psychology by drawing on a number of local historically sedimented discourses. © London School of Economics and Political Science 2014. Source

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