Статичні змішувачі в циркуляційних системах промивальної рідини бурових установок

The work of three static mixer designs in flushing fluid circulation systems of drilling rigs was studied taking into account the basic parameters of drilling mud. Modelling was carried out, and parametric slurry fields were obtained in the pipe work area, that is in a static mixer installation site and in the area of pipeline behind it. The following models were obtained: velocity fields, vorticity fields, turbulence intensity fields, scale turbulence fields along the travel path. Graphs of the parameters changes regarding the tube axis were plotted. The comparative analysis of patterns and curves was carried out. The rational design of static mixer for obtaining of optimum mud mixing technology features is grounded.Досліджено роботу трьох конструкцій статичного змішувача в циркуляційній системі промивальної рідини бурових установок, ураховуючи основні параметри бурового розчину. Виконано моделювання та отримано параметричні поля гідросуміші у робочій зоні труби, а саме в місці установки статичного змішувача і в зоні трубопроводу за ним. Отримано моделі: поля швидкостей, поля завихреності, поля інтенсивності турбулентності, поля масштабу турбулентностей по довжині шляху перемішування. Побудовано графіки зміни досліджуваних параметрів відносно осі труби. Виконано порівняльний аналіз моделей та кривих. Обґрунтовано раціональну конструкцію статичного змішувача для отримання оптимальних технологічних характеристик перемішування бурового розчину

Inter-regional disparities in agriculture and rural population change in Russia

The article presents data reflecting the territorial peculiarities of rural population dynamics and shows their dependence on external factors (primarily, the development of agriculture). The database includes 14 indicators of the regional spatial differentiation of rural population development in Russia between 2010-2020. A typology of regions based on eight economic and ecological parameters is provided. The dataset covers the statistical indicators of 85 Russian regions from 2010 to 2020, published by the Federal State Statistics Service and the Unified Interdepartmental Information and Statistics System. The results are presented in seven tables and six maps. The dataset can be used by federal and regional authorities elaborating science-­based rural development programmes and strategies, as well as experts on rural development

Psycho-pedagogical features of taekwon-do coach readiness for the professional activities

Кузнецова І. Ю. Психолого-педагогічні особливості готовності тренера з таеквон-до до професійної діяльності / Кузнецова І. Ю. // Збірник наукових праць "Педагогічні науки" / МОН України, Херсон. держ. ун-т. ‒ Херсон, 2016. ‒ Вип. LXXІІІ, Т. 2. -С. 80-84.У статті проаналізовано стан дослідженості проблеми професійної підготовки тренерів із різних видів спорту. Розглянуто особливості таеквон-до як виду спорту з позицій різних наук: філософії, біології, педагогіки. Обґрунтовано переваги заняттями таеквон-до (з позицій функціонального розвитку людини будь-якого віку; як соціально та корисно спрямований вид спортивної діяльності; як система спортивного вдосконалення; як система підтримки функціональної форми людини). Визначено складники (психологічний, педагогічний, фізичний, техніко-тактичний) професійної готовності тренера із цього виду спорту до професійної діяльності; розглянуто їхній зміст.The state of research problems of professional training for sports coaches; including coaches from a variety of sports, is analysed in this article. It discusses the ftures of Taekwon-Do as a sport from the point of view of the various sciences: philosophy, biology and pedagogy. The advantages of Taekwon-Do classes are substantiated (concerning the functional position of any person of any age), as a socially useful type of sports activity, regarding a system of sports perfection and maintenance of functional human forms. The article determines the composition of the Taekwon-Do coach readiness relative to the professional activities (psychological, pedagogical, physical, technical and tactical) and examines their contents.В статье проанализировано состояние изученности проблемы профессиональной подготовки тренеров по различным видам спорта. Рассмотрены особенности таэквон-до как вида спорта с позиций различных наук: философии, биологии, педагогики. Обоснованы преимущества занятиями таэквон-до (с позиций функционального развития человека любого возраста; как социально и полезно направленный вид спортивной деятельности; как система спортивного совершенствования; как система поддержки функциональной формы человека). Выделены составляющие (психологическая, педагогическая, физическая, технико-тактическая) профессиональной готовности тренера данного вида спорта к профессиональной деятельности; рассмотрено их содержание

Universities of the North-western federal district in Russian-Finnish research cooperation

This article focuses on the cooperation between universities of the North-western federal district (NWFD) of the Russian Federation, Sweden, and Finland, its intensity and territorial differentiation. The analysis was conducted on the basis of public domain information on the international activity of universities available on their official websites. The authors identify the principle areas and leading centres of such cooperation. The NWFD universities have significant experience in cooperation with Finnish universities. Cooperation with Swedish universities is proved to be less developed. Approximately 50 NFWD universities, 29 of which are located in Saint Petersburg, are involved in cooperation; most NWFD universities do not cooperate with the mentioned countries. Such low degree of cooperation in the field of education is a serious inhibiting factor, which reduces competitiveness on the modern market of educational services

International research cooperation in the Baltic region: a scientometric analysis

This article examines the processes of international research cooperation in the Baltic Sea region. It focuses on research works published in the leading periodicals in 1993-2012. The empirical material is collected from the world’s largest abstract and citation database, SciVerse Scopus, which makes it possible to evaluate macroindicators at the national and global levels as well as the contribution of scholars to the global progress. The article also offers an assessment of the efficiency of research activities in the Baltic Sea region countries. It is based on a number of scientometric indicators that reflect the performance of universities in terms of research journal publications and the development of research cooperation in the field of Baltic studies. The authors consider the dynamics of research contribution and academic cooperation in the Baltic Sea countries in four leading fields - i. e. agricultural and biological sciences, Earth sciences, ecology and social sciences presented in the SciVerse Scopus scientometric database. The article provides a map of research cooperation in the Baltic Sea region

Constructions of regular algebras Lpw(G)L_p^w(G)

Criterion of (Shilov) regularity for weighted algebras $L_1^w(G)$ on a locally compact abelian group $G$ is known by works of Beurling (1949) and Domar (1956). In the present paper this criterion is extended to translation invariant weighted algebras $L_p^w(G)$ with $p>1$. Regular algebras $L_p^w(G)$ are constructed on any sigma-compact abelian group $G$. It was proved earlier by the author that sigma-compactness is necessary (in the abelian case) for the existence of weighted algebras $L_p^w(G)$ with $p>1$.Comment: Submitted to Mat. Sborni

Local border traffic and the development of retail trade in the Kaliningrad region and Polish borderlands

Signing the agreement on local border traffic (LBT) between the Republic of Poland and the Russian Federation was welcomed by experts as an important step towards the future visa-free regime between the European Union and the Russian Federation often discussed in the international dialogue. The three years of LBT mechanism have shown its practical significance for the development of research and cultural contacts, cooperation between municipalities and NGOs of the Kaliningrad region and the borderland (Pomeranian and Warmian-Masurian) voivodeships of Poland. When considering retail trade as a structural element of economy, it is important to address the differences in the effect LBT has had on the development of this sector in the Kaliningrad region and the neighbouring Polish voivodeships. According to Russian experts, LBT results in 7-20% losses in the Kaliningrad region's retail sales, whereas in Poland LBT stimulates retail trade (accounting for 12% of sales in the border voivodeships). This article analyses the role of LBT in the development of retail trade in the Kaliningrad region and the Polish border voivodeships as well as prospects of its development in view of the changing geopolitical situation and adjustment of the currency exchange rates at the end of 2014. Based on statistics and analytical data, the authors arrive at the conclusion that the positive effect of LBT outdoes its negative impact on various sectors of the border regions' economies, including retail trade

The effect of geographical position and employment fluctuations on rural settlement trends

Structural changes in the economy and spatial and inter-settlement differences in living standards and quality of life lead to fundamental alterations in the national settlement system. Settlement polarisation is gathering momentum, along with the movement of rural population from Russia’s east and north to its southern and metropolitan regions. These processes benefit urban agglomerations. Typological differences between regional settlement systems, still poorly understood but essential for strategic and spatial planning, are growing. This article draws on the concept of the geographical demographic situation; it uses official statistics on Russian regions and Kaliningrad municipalities and settlements to explore the connection between rural settlement trends and employment fluctuations caused by structural shifts in Russian regional economies. It is shown how settlement polarisation affects differences in settlement trends of meso- and microdistrict levels. Regions are identified that have a capacity for rural-urban migration and corresponding rural employment structure and trends

DEVELOPMENT OF A MODEL FOR THE PRODUCTION OF METAL-POWDER COMPOSITIONS BASED ON CO-CR ALLOYS BY ELECTROEROSIVE DISPERSION

Abstract. The main requirement for powders for additive 3d technologies is the spherical shape of theparticles. Such particles are most compactly packed into a certain volume and ensure the "fluidity" of the powder composition in the supply systems of the material with minimal resistance. The wide use of the EED method for processing metal waste into powders for the purpose of their reuse and application in additive technologies is hampered by the lack in the scientific and technical literature of full-fledged information on the effect of the initial composition, regimes and media on the properties of powders and technologies of practical application. Therefore, in order to develop technologies for the reuse of electroerosive powders and to evaluate the effectiveness of their use, complex theoretical and experimental studies are required. The aim of the work was to develop a model for the production of metal powder compositions on the basis of Co-Cr alloys by electroerosive dispersion. Based on the results of the conducted studies, it has been established that the optimum parameters for the process of obtaining powder materials by the method of electroerosive dispersion of butyl alcohol are: capacitance of discharge capacitors 48 μF, voltage on electrodes 100 V, repetition rate of pulses 120 Hz