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Belinskiy, Russia

North-Eastern Federal University, previously known as Yakutsk State University, is a school for higher learning in Yakutsk, Siberia. It is the largest institution of higher learning in the north east of Russia.Full nameFederal State Autonomous Educational Institution of Higher Professional Education "M. K. Ammosov North-Eastern Federal University"Brief nameNorth-Eastern Federal University . Wikipedia.

Lazarev N.,North-Eastern Federal University
Zeitschrift fur Angewandte Mathematik und Physik

An equilibrium problem for an elastic Timoshenko-type plate containing a rigid inclusion is considered. On the interface between the elastic plate and the rigid inclusion, there is a vertical crack. Inequality-type boundary conditions are imposed at the crack faces to guarantee mutual nonpenetration. By using a sufficiently smooth perturbation determined in the middle plate plane, the variation of plate geometry is specified. The formula of the derivative of the plate energy functional with respect to the perturbation parameter is deduced. © 2015, Springer Basel. Source

Lazarev N.P.,North-Eastern Federal University
ZAMM Zeitschrift fur Angewandte Mathematik und Mechanik

The equilibrium problems for two-dimensional elastic body with a rigid delaminated inclusion are considered. In this case, there is a crack between the rigid inclusion and the elastic body. Non-penetration conditions on the crack faces are given in the form of inequalities. We analyze the dependence of solutions and derivatives of the energy functionals on the thickness of rigid inclusion. The existence of the solution to the optimal control problem is proved. For that problem the cost functional is defined by derivatives of the energy functional with respect to a crack perturbation parameter while the thickness parameter of rigid inclusion is chosen as the control function. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

Der Sarkissian C.,Copenhagen University | Ermini L.,Copenhagen University | Jonsson H.,Copenhagen University | Alekseev A.N.,North-Eastern Federal University | And 3 more authors.
Molecular Ecology

Millions to billions of DNA sequences can now be generated from ancient skeletal remains thanks to the massive throughput of next-generation sequencing platforms. Except in cases of exceptional endogenous DNA preservation, most of the sequences isolated from fossil material do not originate from the specimen of interest, but instead reflect environmental organisms that colonized the specimen after death. Here, we characterize the microbial diversity recovered from seven c. 200- to 13 000-year-old horse bones collected from northern Siberia. We use a robust, taxonomy-based assignment approach to identify the microorganisms present in ancient DNA extracts and quantify their relative abundance. Our results suggest that molecular preservation niches exist within ancient samples that can potentially be used to characterize the environments from which the remains are recovered. In addition, microbial community profiling of the seven specimens revealed site-specific environmental signatures. These microbial communities appear to comprise mainly organisms that colonized the fossils recently. Our approach significantly extends the amount of useful data that can be recovered from ancient specimens using a shotgun sequencing approach. In future, it may be possible to correlate, for example, the accumulation of postmortem DNA damage with the presence and/or abundance of particular microbes. © 2014 John Wiley & Sons Ltd. Source

Kistanov A.A.,RAS Institute for Metals Superplasticity Problems | Semenov A.S.,North-Eastern Federal University | Dmitriev S.V.,Saint Petersburg State Polytechnic University
Journal of Experimental and Theoretical Physics

The molecular dynamics method is applied to determine the domain of the parameters of an ansatz for defining initial conditions that lead to the excitation of fixed and moving discrete breathers in a monoatomic two-dimensional crystal with the Morse interatomic interaction. The main features of the effect of the parameters of the ansatz on the amplitude and velocity of discrete breathers are established. © 2014, Pleiades Publishing, Inc. Source

It is considered the question about development and using of the parallel procedures for the searching of the extremum of the multivariable factors to efficiency for decision of the inverse problems of prediction defining parameters composite materials on the base complicated models. © 2016, Institute of Problems of Mechanical Engineering. Source

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