In modern conditions of the society development, there is a single direction of the development of national economies and their regions - through sustainable development. It is the consideration of the simultaneous economic, social and environmental direction of regional development that gives the greatest resultant effects of the territorial development. In turn, sustainable development requires the development of the  specific evaluation methods that can give sound, accurate results of assessing the state and dynamics of sustainable development of regions. The authors propose a methodological approach that involves determining the state and dynamics of sustainable development by determining the integrated index and its components by calculating the integrated sub-indices. The method of assessing the state and dynamics of sustainable development involves the use of disparate methods, including statistical, grouping, rationing, simulation, graphical and cartographic. In addition, the use of such mathematical techniques as: correlation analysis, multiple regression, cluster and factor analysis. The approbation of this method on the example of the regions of Ukraine is carried out. In turn, the obtained calculations of the sub-indices of economic, social and environmental components and sustainable development of the regions as a whole will contribute to the development of measures to increase the level of sustainable development and achieve its goals.

A complex of research has been conducted to establish the causes of the accident of the main gas pipeline made of 1420x15.7 mm X70 steel after 20 years of operation. It is found that pipe destruction was initiated by the longitudinal crack with a length of 470 mm and a maximum depth of 6.8 mm, oriented in the direction of the pipe and perpendicular to the outer surface of the pipe identified as stress-corrosion cracking. The crack initiation is due to the disboundment of the tape protection coating, the high corrosion activity of the soil, and the complex stress-strain state caused by deviations from the design objectives during construction. The chemical composition the base metal of all investigated pipes corresponds to the requirements of the technical conditions for steel pipes in category X70; pipes welding are performed with the typical materials used in pipe welding plants. Despite the differences, the structural and mechanical characteristics (yield strength, ultimate strength, and impact strength) of the steel and weld metal of the studied pipes are identical. The relative elongation (d5) of the operated pipes is below the normalized values, but, it is necessary to take into account the possibility of deviations in these characteristics of steel in the initial state. Significant reserves of toughness indirectly indicate low damage of metal and, accordingly, satisfactory resistance to destruction of the metal of the studied pipes.

УДК 316. 334.23 Сірий Є.В. Київський національний університет імені Тараса Шевченка, факультет соціології, д.соц.н., доц. ІНСТИТУЦІОНАЛЬНІ ЗАСАДИ ДОСЛІДЖЕННЯ ТРАНСФОРМАЦІЙНИХ ПРОЦЕСІВ В АСПЕКТІ РИНКОВО-ПІДПРИЄМНИЦЬКОГО СЕГМЕНТУ СУЧАСНОГО УКРАЇНСЬКОГО СУСПІЛЬСТВА У статтіі розглядається комплексне питання стосовно можливості застосування засад іституціонального підходу як метаметодологічного засобу у вивченні аспектів розвитку ринково-підприємницької системи як трансформаційного компоненту сучасного українського суспільсьтова. Ключові слова: інституціоналізм, засади, суспільні трансформації, ринковопідприємницька система, інститути, економічні реформи. В статье рассматривается комплексный вопрос относительно возможности применения принципов иституционального подхода как метаметодологического средства в изучении аспектов развития рыночно-предпринимательской системы как трансформационного компонента современного украинского социума. Ключевые слова: институционализм, основы, общественные трансформации, рыночно-предпринимательская система, институты, экономические реформы.The possibility of application of the principles of institutional approach as metamethodological instrument of the study of the aspects of development of the market-enterprise system as a transformation component of modern Ukrainian society is substantiated in the artickle .

The author identified the main problems and challenges of regional development that occurred in Ukraine due to the full-scale invasion of the Russian Federation. The theoretical, methodological and practical aspects of the institutional support for the modernization of the productive forces of the region and the main aspects of the post-war reconstruction of the regional space are indicated. Today, the Ukrainian economy is experiencing an unprecedented shock in history. The massive military invasion of the northern neighbors dealt a heavy blow to all links of the economic system of our country. The production of the main types of products has decreased, in particular those that constitute the export potential of Ukraine. In addition, the ports are blockaded, making them the largest share of foreign trade. The transport and logistics, social, marketing and engineering infrastructure of the entire region is collapsing. Labor outflow and partial displacement temporarily displace hundreds of thousands or even millions of people from active economic life. The development of Ukraine depends on various factors, but the key ones are the sovereignty of the territory, the size and structure of the population, the presence and power of the national economy, and the infrastructure connecting the countries. Based on an objective analysis of the situation, determination of internal strengths and limitations, taking into account possible external risks/threats, the competent authorities of the country formulate and implement policies. Therefore, the development of a new regional development policy requires a comprehensive analysis and assessment of the current situation related to the war and the situation in Ukraine as a whole, regions and territorial communities. Military victory is very difficult, and sustained post-war growth is virtually impossible without a stable economy. Thus, today the domestic economy is increasingly becoming one of the priority fronts that determine the further course of military operations and their ability to successfully rebuild after the end. Ukraine's post-war economic boom is possible only if the country's economic policy measures are implemented in accordance with a clear and consistent strategy aimed at deregulation of the economy and creation of a favorable investment environment.

У статті визначено категоріальні аспекти формування понятійної бази в питаннях удосконалення інституціонального середовища регіональної та національної економіки. Визначено основні історичні передумови становлення та розвитку сучасного інституціоналізму. Досліджено особливості впливу інститутів та інституцій на модернізацію продуктивних сил регіонів України в умовах переформатування владних повноважень. Окреслено загальні риси, виокремлено специфічні, зосереджено наукову увагу на етапізації становлення основних парадигм інституціоналізму. Проаналізовано сутнісні ознаки переваг, викликів і загроз, які несе в собі для регіональної економіки процес децентралізація.