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Groznyy, Russia

Chechen State University is a university located in Grozny, Chechnya, Russia. The school is home to the North Caucasian Centre of Pedagogics. The university traces its roots back to 1938. Wikipedia.

Smirnov V.N.,RAS Semenov Institute of Chemical Physics | Akhmadov U.S.,Chechen State University
Kinetics and Catalysis | Year: 2010

Experimental results on the interaction of Cr atoms with various oxygen-containing molecules (NO, N2O, CO2, NO2, and SO2) at high temperatures (>1000 K) are presented. It is demonstrated that activation barrier for spin-forbidden reactions is higher, all other things being equal. For the reaction of Cr atoms with N2O, an interpolated temperature dependence of the rate constant, based on the high-temperature measurements conducted in the present work and the published low-temperature data, is proposed. © 2010 Pleiades Publishing, Ltd. Source

Georgievskii D.V.,Moscow State University | Israilov M.S.,Chechen State University
Mechanics of Solids | Year: 2015

In the problems of common vibrations of extended underground structures (pipelines and tunnels) and soil, an approach of the one-dimensional deformation of the medium is developed; this approach is based on the assumption that the soil deformation in the direction of seismic wave propagation coinciding with the pipeline axis is prevailing. The analytic solutions are obtained in the cases where the wave velocity in the soil is respectively less or greater than the wave velocity in the pipeline. The parameters influencing the pipeline fracture are revealed and methods for increasing the seismic stability of such structures are given. The possibility of the pipeline fatigue fracture is pointed out. The statements and solutions of parabolic problems modeling the physical phenomena in soils in the case of discontinuous velocity on the boundaries at the initial time are given. The notion of generalized vorticity diffusion is introduced and the cases of self-similarity existence are classified. A detailed analysis is performed for the non-Newtonian polynomial fluid, the medium close in properties to the rigidly ideally plastic body, and the viscoplastic Shvedov—Bingham body. In the case of physically linear medium, new self-similar solutions are obtained which describe the process of unsteady axially symmetric shear in spherical coordinates. The first approximation to the asymptotic solution of the problem of the vortex sheet diffusion is constructed in a medium with small polynomial nonlinearity. The solutions polynomially decreasing to zero as the self-similar variable increases are proposed in the class of two-constant fluids. © 2015, Allerton Press, Inc. Source

Israilov M.S.,Chechen State University
Moscow University Mechanics Bulletin | Year: 2016

The method proposed by E.A. Il’yushina is used to study the longitudinal vibrations of segmented buried pipelines. It is shown that the averaged wave velocity in a periodically nonuniform pipeline is specified by the effective static moduli of the periodicity cell and that, in the case of using a vibration damping material made of rubber or soft metal at joints between pipes, this velocity can be much less than the velocity of longitudinal waves in the main pipe. The last fact makes it reasonable to consider supersonic regimes in the problems of seismic vibrations when the wave velocity in a pipeline is less than the wave velocity in the soil. © 2016, Allerton Press, Inc. Source

Konstantinou-Rizos S.,Chechen State University | Mikhailov A.V.,University of Leeds
Journal of Physics A: Mathematical and Theoretical | Year: 2016

We construct a noncommutative (Grassmann) extension of the well-known Adler Yang-Baxter map. It satisfies the Yang-Baxter equation, it is reversible and birational. Our extension preserves all the properties of the original map except the involutivity. © 2016 IOP Publishing Ltd. Source

Israilov M.S.,Chechen State University
Moscow University Mechanics Bulletin | Year: 2015

In the problem of coupled seismic vibrations of an elastic medium and a segmented pipeline equipped with flexible joints, an analogy to a linear chain of lumped masses is discussed. This analogy leads to a simple approach to study the seismodynamics of underground pipelines by reducing the problem for a medium to a one-dimensional one devoted to the shear vibrations of a cylindrical layer. As examples, a number of equations describing the coupled motions of pipelines are proposed with consideration of the viscoelastic properties of the medium or the viscoelastic deformation at the joints. © 2015, Allerton Press, Inc. Source

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