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3. RESEARCH OF ENTERPRISE ACTIVITY OF CITIZENS IN THE RUSSIAN FEDERATION: RESTRICTIONS AND POTENTIAL OPPORTUNITIES

Author

Medvedeva N. V. and Kutsova K. O.

Subjects
экономика, предпринимательство, предпринимательская активность, малый и средний бизнес, портрет предпринимателя, товары и услуги, рынок, государственная поддержка, economics, entrepreneurship, entrepreneurial activity, small and medium business, businessman portrait, goods and services market, state support, Economics as a science, HB71-74
Abstract

At present, the development of small and medium businesses is becoming one of the priority directions of the state policy in Russia, particularly in the context of import substitution and renovation of the economy. The small business sector provides the creation of new jobs and, therefore, reduces the indicators of social unrest and unemployment. Thus, on the one hand, the state is interested in the development of small businesses, but on the other hand, currently there are no effective mechanisms to support small business and there are high tax rates on entrepreneurial activity. As a result of analysis of the development of small and medium businesses in Russia authors outline groups of factors affecting the entrepreneurial activity and describe the conditions for the development of small businesses. Based on the studies, problems and constraints of small and medium-sized businesses in Russia are presented. The study results allow us to determine ways to improve entrepreneurial activity of citizens in modern Russian conditions.

Published
2017
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19. Enhanced thermoluminescence of sodium-doped lithium–magnesium fluorophosphate Li9Mg3[PO4]4F3.

Author

Akulov, D. A., Kalinkin, M. O., Chufarov, A. Y., Tyutyunnik, A. P., Semkin, M. A., Medvedeva, N. I., Zhuravlev, N. A., Abashev, R. M., Surdo, A. I., and Kellerman, D. G.

Subjects
AB-initio calculations, NEUTRON diffraction, THERMOLUMINESCENCE, IONIZING radiation, X-ray diffraction
Abstract

Lithium–magnesium fluorophosphate with the formula Li9Mg3[PO4]4F3 has recently been proposed as a new thermoluminescent material capable of storing ionizing radiation energy and emitting photons after additional thermal stimulation. Pure and sodium-doped fluorophosphates were obtained by microwave-assisted synthesis. Using X-ray and neutron diffraction methods, it was shown that sodium occupies only one of the three nonequivalent lithium positions. This conclusion was confirmed by a MAS NMR study and ab initio calculations. A significant increase in the thermoluminescence intensity of sodium-containing fluorophosphates in comparison to the undoped compound was found. Analysis of the kinetic parameters obtained from glow curves showed that they are similar for the undoped and sodium-doped samples. This indicates that the addition of sodium does not result in the emergence of novel types of traps, but rather in a change in their number. The effect of sodium on the formation of intrinsic defects, which can be responsible for the enhanced thermoluminescence, is considered using ab initio modelling. [ABSTRACT FROM AUTHOR]

Published
2024
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