Analysis of migration processes based on census data

The subject matter of research is the internal migration processes of the Russian population in the period from the 1960s to 2010. The research is based on the data about the territorial population flows published in the all-Union census materials of 1970, 1979, and 1989, and in the all-Russia census materials of 2002 and 2010. The basic migration flows and directions are considered. Methodologically, the analysis of migration is based on the use of end-to-end indicators enabling to assess the dynamics of migration processes over a long period. Special attention is paid to rural-urban internal migrations, the volumes, patterns and consequences of which have not been so far properly investigated or assessed. The authors offer and calculate relative indicators that have never been used to assess the processes in question. To make the census materials of the soviet and post-soviet periods comparable, the economic zoning adopted before 2000 is used, and the administrative-territorial network is unified. The authors confirm the hypothesis that from decade to decade the intensity of territorial mobility of both urban and rural population was reduced. Interregional migration flows are considered, and various tendencies and migration intensity for over four decades are de ned. The authors analyze the dynamics in the structure of migrants by the time they lived in the place of their permanent residence in various regions. The research shows that the tendencies developed at that time and persisting continue to adversely affect the territorial re-distribution of population and the regional social and economic development of the country. The research results can be used in adjusting the regional socio-economic and migration policy.The article has been prepared with the support of the Russian Humanitarian Science Foundation Project № 14–02–00525

Determination of stress-strain state of porous rubber buffer in a nonlinear deformation conditions

Розроблено підхід до чисельного аналізу напружено-деформованого стану пористого гумового буфера в умовах нелінійного деформування на основі моментної схеми скінченного елемента з використанням різних методів визначення ізотропних модулів пружності пористої гуми. Проведено розрахунок пористого гумового буфера в умовах в’язкопружного деформування з використанням ядра релаксації, що включає миттєвий і тривалий модуль пружності пористої гуми та в умовах геометрично нелінійного деформування.Approach for the numerical analysis of stress-strain state of the porous rubber buffer in non-linear strained conditions has been depeloped. There were examined the methods of isotropic elastic modulus of porous materials such as self-consistence method for the spherical, needle shaped and disk shaped pores as well as the Khashin-Shtrikman variation method for the free shaped pores. Geometric non-linear strain model that includes sequential solution of the linear problems including the recalculation on each step of matrix stiffness of the whole construction has been built, the finite strain tensor of porous body in this case being shown as a sum of linear and non-linear constituents. Porous body stress tensor is based on the general Hooke’s law and includes the dependence from the porous material elasticity, metric tensor components, approximation of the first, second and the third strain tensor invariants. For viscoelastic deformation modeling integral relations based on Boltzmann - Volterra genetic theory were used. In this case porous body stress tensor includes the tensors of instant and continuous porous materials elastic modules, metric tensor components and the linear part of the first strain tensor invariant. To solve the resulting integral equations in three dimensional statement there time discretization for viscoelastic deformation and load discretization for geometric non-linear deformation, was used with the further use of the modified Newton - Kantorovich method. To solve the problem finite element momentum scheme on each step was used. Geometric nonlinearity and viscoelasticity of the material was formed by entering the additional load vector based on variational principle. Calculation of porous rubber buffer allowing the relaxation only of the porous rubber shift module in terms of viscoelastic deformation using the relaxation core has been carried out. It includes instant and continuous porous materials shift modules. As a result, the components of deformation stress state i.e. time distribution of normal stresses and motion dependence on both time and stress has been obtained

Non-transversality of the gluon polarization tensor in a chromomagnetic background

We investigate the question about the transversality of the gluon polarization tensor in a homogeneous chromomagnetic background field. We re-derive the non transversality known from a pure one loop calculation using the Slavnov-Taylor identities. In addition we generalize the procedure to arbitrary gauge fixing parameter $\xi$ and calculate the $\xi$-dependent part of the polarization tensor.Comment: subm. to TM

First results from the TUS orbital detector in the extensive air shower mode

TUS (Tracking Ultraviolet Set-up), the first orbital detector of extreme energy cosmic rays (EECRs), those with energies above 50 EeV, was launched into orbit on April 28, 2016, as a part of the Lomonosov satellite scientific payload. The main aim of the mission is to test a technique of registering fluorescent and Cherenkov radiation of extensive air showers generated by EECRs in the atmosphere with a space telescope. We present preliminary results of its operation in a mode dedicated to registering extensive air showers in the period from August 16, 2016, to November 4, 2016. No EECRs have been conclusively identified in the data yet, but the diversity of ultraviolet emission in the atmosphere was found to be unexpectedly rich. We discuss typical examples of data obtained with TUS and their possible origin. The data is important for obtaining more accurate estimates of the nocturnal ultraviolet glow of the atmosphere, necessary for successful development of more advanced orbital EECR detectors including those of the KLYPVE (K-EUSO) and JEM-EUSO missions.Comment: 18 pages; v2: references fixed; v3: minor changes to address referee's comment