Models of Decision Choices of the Tax-Paying Scheme for a Small Enterprise

The existence and profitability of a small enterprise depend on its tax-paying method. In the paper a mathematically sound but simple enough algorithm is suggested for a choice of the best tax-paying scheme of a small enterprise. It allows comparing different variants of tax-paying schemes in the express-analysis regime and then choosing the optimal one with the minimum tax assignment sum being a criterion of optimization.Federalism; decentralization; Russia

Инновационная деятельность как фактор экономического роста региона (на примере ЦФО)

This article discusses the modern paradigm of economic development based on the innovation component at the regional level of the Russian Federation. The current features of the innovative development of the regions of the Central Federal District are analyzed. A correlation analysis of the level of dependence of the economic growth of the regions on the key indicators of innovative activity has been carried out. The final conclusions on the topic of the study regarding the peculiarities of the impact of innovation on economic growth in the regions of the Russian Federation are formulated

Современные тенденции в сфере кадровой составляющей инновационного потенциала региона (на примере регионов ЦФО)

Within the framework of this article, the current situation in the field of the personnel component of the region's innovative potential is analyzed (using the example of the subjects of the Central Federal District). The analysis of the dynamics of key indicators characterizing the level of provision of the R&D sphere with researchers and designers is carried out. A final conclusion is made regarding the development of the situation in this area at the present stage of development

Software for optimal selection of places for installation of balancing devices in 0,4 kV electric power systems loaded with electric motors

This publication considers the issues of development of the software program for designing of 0,4 kV power supply systems with motor-actuated load under voltage unsymmetry conditions (using the example of the Trans-Baikal Territory). Voltage unsymmetry is practically constant phenomenon in the electric power networks of different voltage types. Voltage unsymmetry effects significantly the electric power consumers, including the supply mains itself. It has especially negative impact on the electrical equipment operation process and its lifetime. The urgency of the problem is confirmed by multiple research on the same topic and by significant number of damages suffered by the electric power consumers staying in service (especially in the Trans-Baikal Territory and in the Far-East regions). Voltage unsymmetry causes economic loss and reduction of the electromagnetic interference value by the voltage unsymmetry coefficient in negative-phase sequence (K2U) gives inevitable economic effect accordingly. However, the payback period for the activities aimed at reduction of electromagnetic interference, will vary from some months to several years. The more accurate value of the payback period may be obtained using the developed software program. The developed software design program is implemented by means of the programming language C# in Microsoft Visual Studio environment, using the built-in cross-platform database SQLite. The software program shall allow making quick and accurate calculation of the power losses, to determine the economic feasibility of provision special measures for removal of the voltage unsymmetry, for determination of optimal application and location of the balancing devices. The software implementation in power systems loaded with electric motors will improve reliability and efficiency of asynchronous motors. The software is of interest for developers of projects on power supply systems for regions with non-linear loads

Determination of the energy characteristics of the reactions UF6 ↔ UF5 + F and UF6 ↔ UF4 + F2

Quantum-mechanical methods are used to assess the energy barriers to dissociation and recombination reactions of UF6 ↔ UF5 + F and UF6 ↔ UF4 + F2. The energy characteristics of these reactions are found to be strongly asymmetric: the dissociation reaction barriers exceed the recombination reactions barriers by more than 4 eV. The equilibrium atomic configurations of F2, UF4, UF5 and UF6 have been determined using precision quantum mechanical calculations. The U-F bond lengths obtained as a result of the calculations are in good agreement with experimental data. It was found that the decay reaction UF6 → UF5 + F is either barrier-free, or the energy barrier for such a reaction is less than the resolving power of the method (~ 0.1 eV). For the decay of UF6 → UF4 + F2, there is an energy barrier with a height of about 0.3 eV. An initial approximation was proposed for the arrangement of UF6 atoms in order to find the saddle points of the UF6 dissociation reactions. In this initial configuration, all 7 atoms of the UF6 molecule are located in the same plane. The F atoms are located at the vertices of a regular hexagon, and the U atom is at the center of such a hexagon. The results of this work can be used to determine the constants of thermal reactions of dissociation and recombination UF6 ↔ UF5 + F и UF6 ↔ UF4 + F2. These constants are necessary for modeling the physicochemical processes occurring during the enrichment of spent nuclear fuel (SNF)

Software for optimal selection of places for installation of balancing devices in 0,4 kV electric power systems loaded with electric motors

This publication considers the issues of development of the software program for designing of 0,4 kV power supply systems with motor-actuated load under voltage unsymmetry conditions (using the example of the Trans-Baikal Territory). Voltage unsymmetry is practically constant phenomenon in the electric power networks of different voltage types. Voltage unsymmetry effects significantly the electric power consumers, including the supply mains itself. It has especially negative impact on the electrical equipment operation process and its lifetime. The urgency of the problem is confirmed by multiple research on the same topic and by significant number of damages suffered by the electric power consumers staying in service (especially in the Trans-Baikal Territory and in the Far-East regions). Voltage unsymmetry causes economic loss and reduction of the electromagnetic interference value by the voltage unsymmetry coefficient in negative-phase sequence (K2U) gives inevitable economic effect accordingly. However, the payback period for the activities aimed at reduction of electromagnetic interference, will vary from some months to several years. The more accurate value of the payback period may be obtained using the developed software program. The developed software design program is implemented by means of the programming language C# in Microsoft Visual Studio environment, using the built-in cross-platform database SQLite. The software program shall allow making quick and accurate calculation of the power losses, to determine the economic feasibility of provision special measures for removal of the voltage unsymmetry, for determination of optimal application and location of the balancing devices. The software implementation in power systems loaded with electric motors will improve reliability and efficiency of asynchronous motors. The software is of interest for developers of projects on power supply systems for regions with non-linear loads

Разработка методики определения оптимального размещения устройств симметрирования для систем электроснабжения 0,4 кВ с электродвигательной нагрузкой

In this paper, we consider the development of methods for determining the optimal location of symmetrization devices for 0.4 kV power supply systems with motor-actuated load. The methodology includes the features of electric consumers and their geographical location. The practice procedures for application of the existing power supply system the Taptugary village, the Mogochinsk region, the Trans-Baikal Territory was given as an example. The practical significance for the developed application procedures was justified. The optimal solution of balancing problem based on economical parameters was obtainedРассматриваются вопросы разработки методики определения оптимального размещения устройств симметрирования для систем электроснабжения 0,4 кВ с электродвигательной нагрузкой. В методику заложены особенности электропотребителей и их географическое расположение. Приведен пример применения методики для существующей системы электроснабжения с. Таптугары Могочинского района Забайкальского края. Дано обоснование практической значимости применения разработанной методики. Получено оптимальное решение вопроса симметрирования исходя из экономических показателе

Разработка методики определения оптимального размещения устройств симметрирования для систем электроснабжения 0,4 кВ с электродвигательной нагрузкой

In this paper, we consider the development of methods for determining the optimal location of symmetrization devices for 0.4 kV power supply systems with motor-actuated load. The methodology includes the features of electric consumers and their geographical location. The practice procedures for application of the existing power supply system the Taptugary village, the Mogochinsk region, the Trans-Baikal Territory was given as an example. The practical significance for the developed application procedures was justified. The optimal solution of balancing problem based on economical parameters was obtainedРассматриваются вопросы разработки методики определения оптимального размещения устройств симметрирования для систем электроснабжения 0,4 кВ с электродвигательной нагрузкой. В методику заложены особенности электропотребителей и их географическое расположение. Приведен пример применения методики для существующей системы электроснабжения с. Таптугары Могочинского района Забайкальского края. Дано обоснование практической значимости применения разработанной методики. Получено оптимальное решение вопроса симметрирования исходя из экономических показателе

Genetic screening of an endemic mutation in the DYSF gene in an isolated, mountainous population in the Republic of Dagestan

Abstract Background Dysferlinopathy has a high prevalence in relatively isolated ethnic groups where consanguineous marriages are characteristic and/or the founder effect exists. However, the frequency of endemic mutations in most isolates has not been investigated. Methods The prevalence of the pathological DYSF gene variant (NM_003494.4); c.200_201delinsAT, p. Val67Asp (rs121908957) was investigated in an isolated Avar population in the Republic of Dagestan. Genetic screenings were conducted in a remote mountainous region characterized by a high level of consanguinity among its inhabitants. In total, 746 individuals were included in the screenings. Results This pathological DYSF gene variant causes two primary phenotypes of dysferlinopathy: limb‐girdle muscular dystrophy (LGMD) type R2 and Miyoshi muscular dystrophy type 1. Results indicated a high prevalence of the allele at 14% (95% confidence interval [CI]: 12–17; 138 out of 1518 alleles), while the allele in the homozygous state was detected in 29 cases—3.8% (CI: 2.6–5.4). The population load for dysferlinopathy was 832.3 ± 153.9 per 100,000 with an average prevalence of limb‐girdle muscular dystrophies ranging from 0.38 ± 0.38 to 5.93 ± 1.44 per 100,000. Conclusion A significant burden of the allele was due to inbreeding, as evidenced by a deficiency of heterozygotes and the Wright fixation index equal to 0.14 (CI 0.06–0.23)