The effective electrical conductivity of a two-phase liquid-metal flow

Electrical conductivity of two phase liquid metal flow in magnetohydrodynamic generato

Mass and momentum transfer by solitary internal waves in a shelf zone

The evolution of large amplitude internal waves propagating towards the shore and more specifically the run up phase over the "swash" zone is considered. The mathematical model describing the generation, interaction, and decaying of solitary internal waves of the second mode in the interlayer is proposed. The exact solution specifying the shape of solitary waves symmetric with respect to the unperturbed interface is constructed. It is shown that, taking into account the friction on interfaces in the mathematical model, it is possible to describe adequately the change in the phase and amplitude characteristics of two solitary waves moving towards each other before and after their interaction. It is demonstrated that propagation of large amplitude solitary internal waves of depression over a shelf could be simulated in laboratory experiments by internal symmetric solitary waves of the second mode

Phase equilibria and thermodynamic properties of oxide systems on the basis of rare earth, alkaline earth and 3d-transition (Mn, Fe, Co) metals. A short overview of

Review is dedicated studies of phase equilibria in the systems based on rare earth elements and 3d transition metals. It’s highlighted several structural families of these compounds and is shown that many were found interesting properties for practical application, such as high conductivity up to the superconducting state, magnetic properties, catalytic activity of the processes of afterburning of exhaust gases, the high mobility in the oxygen sublattice and more

Russia’s banking sector during the pandemic

Quarantine and self-isolation have become a new challenge for the Russian economy, changed many areas of our life, revealed new weaknesses in the banking system and monetary regulation of the economy, and also become a good test for the post-crisis financial system. In this article using a systematic approach to the study of information, analytical and graphical methods the dynamics of the Russian banking sector during the development of the coronavirus pandemic and the specifics of recovery from the crisis have been investigated. The innovations and improvements brought about by the pandemic have been studied. The Central Bank of Russia’s monetary policy instruments used to mitigate the impact of the pandemic on the real economy in general and on the banking sector in particular have been reviewed. The features of anti-crisis measures taken by the monetary authorities in our country have been revealed

The “Digital Economy of the Russian Federation” national program as a support mechanism for the Russian information technology industry

The current pace of information technology development of the economy has a significant impact on the social life. This explains the necessity of using a scientific approach to assess the effectiveness of the implementation of the “Digital Economy of the Russian Federation” national program as a tool of government regulation of the economy and determines the high relevance of the topic of the study. The goal of the article is to identify significant areas of regulation of the Russian information technology industry on the basis of the assessment carried out. The objective of the study was to perform comprehensive analysis of the economic situation of the Russian Federation using the example of the information technology industry and to propose measures aimed at addressing imbalances in the industry’s advancement. The author of the article examined performance indicators of the industry and provided a description of the national program under study. The econometric model constructed revealed a high level of influence that program implementation measures have on the competitiveness of the industry

Investment resources of the mining and metallurgical complex: management features, analysis of the composition, structure and sources of their formation

In the conditions of the modern economy, an especially important area of economic activity of any company is its investment activity, which is associated with the investment of certain funds in the implementation of both long-term and medium-term projects. Without increasing in the receipt of financial resources from various sources used for investment, it is impossible to achieve the largescale goals of innovative, technological and information development of the socio-economic sphere in Russia. The purpose of this article is to study the specifics of the management of investment resources of metallurgical and mining companies in the country, as well as the analysis of the composition, structure of their investment resources and sources of their formation. The methods of comparative analysis, a systematic approach to the study of information, graphical methods are used. This article considers the factors affecting the efficiency of investment activities of mining and metallurgical enterprises. The measures for the implementation of the strategy of sustainable development are proposed. The features of the formation of the composition and structure of investment resources of companies in the industry are revealed

Efficiency of scallop <i>Mizuhopecten yessoensis</i> cultivation in the Ussuri Bay (Japan Sea)

Data on cultivation of scallop Mizuhopecten yessoensis in the Ussuri Bay are generalized. The marine farms are located in the shallow waters at depths of 2-18 m, their plantations occupy different areas with different hydrodynamics. Complex structure of the plantations (collectors, cages and bottom facilities) is formed in the semi-closed Sukhodol Bay, but bottom plantations only for growing of scallop and sea cucumber are mounted in two other bays. The local broodstocks of scallop were formed by juveniles transported from the Posyet Bay, after that at least 20 million individuals of scallop spat were collected in three bays in 2000-2014, and their growing gave the total commercial output about 216 t (111 t in the Sukhodol Bay, 70 t in the Ilmovaya Bay, and 35 t in the Malye Kushi Bay). This is rather weak result that shows that the area has limited abilities for development of this type of aquaculture. The main reason was low density of spat on substrata: it never exceeded 200 ind./collector and did not increase during the farms development, so the farmers were forced to increase the number of collectors to obtain required number of spat; moreover, some years were unfavorable for collecting of juvenile scallops. There is concluded that environmental conditions in the eastern Ussuri Bay are not optimal for the scallop cultivation by extensive method

The spatial distribution the thickness of polymer powder coatings for ultrasonic sensors

© Published under licence by IOP Publishing Ltd. Objects of research are coatings and technology of their applying to the piezoelectric elements for ultrasound. Results of studies the distribution coating thickness according to different modes of coating process are presented. Experimentally confirmed the simulation results of the movement gas suspension on the electrostatic field in the electrode system "needle - plane"

Use of Microsoft Technologies in Hybrid Learning of a Foreign Language at School

В статье рассматривается практический опыт использования технологий Microsoft на уроках английского языка в условиях гибридного обучения. Раскрываются вопросы организации урока при гибридном (смешанном) формате обучения, когда часть детей присутствует на уроке очно, а часть — дистанционно.The article discusses the practical experience of using Microsoft technologies in English lessons in a hybrid learning environment. The questions of the organization of the lesson in a hybrid (mixed) format of education are revealed, when part of the children is present at the lesson in person, and part is remotely

Quantitative and qualitative analysis of sunflower pollen (<i>Helianthus</i> L.) and it’s use in breeding work

Background. In breeding work, it is necessary to take into account such an important feature as male sterility of the hybrids obtained. If a plant has visually visible anthers and pollen, the quality of the pollen grains themselves may be low. It is necessary to carry out not only a visual analysis, but also a cytological study of pollen in order to properly assess the reproductive potential of plants.Materials and methods. Wild species, some cultivars, lines and hybrids of sunflower from the collection of the N. I. Vavilov All-Russian Institute of Plant Genetic Resources were taken as objects of research. The plants were grown on the fields of Kuban Experiment Station. Pollen was collected from preinsulated inflorescences, fixed in FAA solution and stained with acetocarmine. The ratio of fertile pollen grains to the total number of pollen grains (in %) was calculated, the diameter of the pollen grains was measured, and variability curves were drawn.Results. Mature pollen grains in sunflower are rounded, tricolpate-poral, threecelled; the average pollen diameter in cultivated sunflower is 28–32 μm; in wild species, the range is from 20– 22 μm to 32–34 μm. All accessions were divided into three groups. Fertile: high level of fertility (75–99%) and low morphological heterogeneity of pollen; the variation curve for the average diameter was characterized by one distinct peak. Most of the studied accessions were included here: cultivars, most of the lines and some of the wild species. Semi-fertile: the number of well-stained pollen grains is below 75%; there are differences in the degree of staining and size of the pollen; the variation curve had additional peaks. This group included some of the lines, hybrids and wild species. The greatest morphological heterogeneity was observed in the group of perennial interspecific hybrids. Sterile: pollen grains were absent or were observed very sporadically.Conclusion. To assess the fertility of plants, it is important not only to determine the degree of staining in pollen grains, but also to rank them by diameter and construct variation curves to reveal morphological heterogeneity of pollen