Isochoric thermal conductivity of solid nitrogen

The isochoric thermal conductivity of solid nitrogen has been investigated on four samples of different densities in the temperature interval from 20 K to the onset of melting. In alfa-N2 the isochoric thermal conductivity exhibits a dependence weaker than 1/T; in beta-N2 it increases slightly with temperature. The experimental results are discussed within a model in which the heat is transported by low-frequency phonons or by "diffusive" modes above the mobility boundary. The growth of the thermal conductivity in beta-N2 is attributed to the decreasing "rotational" component of the total thermal resistance, which occurs as the rotational correlations between the neighboring molecules become weaker.Comment: Postscript 12 pages, 3 figures, 1 table. To be published in 200

Autoclave modeling of corrosion processes occurring in a gas pipeline during transportation of an unprepared multiphase medium containing CO2

The problem of selecting a method for ensuring the reliability of the unprepared fluid transport facilities of an unprepared fluid in the presence of carbon dioxide is considered. Carbon dioxide corrosion is one of the dangerous types of damage to field and main pipelines. It has been shown that dynamic autoclave tests should be carried out during staged laboratory tests in order to determine the intensity of carbon dioxide corrosion and to select the optimal method of protection. A hypothesis about the imperfection of the existing generally accepted approaches to dynamic corrosion testing has been put forward and confirmed. A test procedure based on the use of an autoclave with an overhead stirrer, developed using elements of mathematical modeling, is proposed. The flows created in the autoclave provide corrosive wear of the sample surface similar to the internal surfaces elements wear of the pipelines piping of gas condensate wells. The autoclave makes it possible to simulate the effect of the organic phase on the flow rate and the nature of corrosion damage to the metal surface, as well as the effect of the stirrer rotation speed and, accordingly, the shear stress of the cross section on the corrosion rate in the presence/absence of a corrosion inhibitor. The given results of staged tests make it possible to judge the high efficiency of the developed test procedure

The USSR and The French Defeat of 1940

Статья посвящена исследованию резонанса, который победа Германии над Францией в 1940 г. вызвала в Советском Союзе. Автор уделяет особое внимание реакции советских военных кругов, которые, по его мнению, были среди первых, кто осознал стратегические перемены после падения Франции. Документальные источники, цитируемые в работе, отражают мнения как командования, так и рядовых солдат

The Influence of Cyclicality of the Global Economic System Development on the Structure and Dynamics of Ukraine’s Foreign Trade

The aim of the article is to study the structure and dynamics of Ukraine’s foreign trade under the influence of cyclicality of the global economic system development. There analyzed reasons for the predominance of primary sector goods in the structure of Ukraine’s production, which causes a relatively high seasonal volatility of the economic growth rates. The raw material orientation of Ukraine’s exports explains the instability of the Ukrainian economy regarding the fluctuations of the world market conjuncture. Ukraine’s critical dependence on the cyclical fluctuations of the global economic system manifested itself in 2009, when the adverse conjuncture of the world prices for metals and commodities led to a sharp decline in the production volumes in the national economy. It is concluded that the possible ways of solving the above problems in the national economy of Ukraine is the modernization and restructuring of industrial production, increase in the production volumes of goods for domestic consumption, technological and organizational renewal of the fixed assets of manufacturing enterprises, as well as reorientation of the Ukrainian industry to producing goods with a higher degree of processing along with increasing the share of high-tech products in the total exports

EPIDEMIC SITUATION AND TREATMENT PROSPECTS OF MULTIPLE RESISTANT TUBERCULOSIS IN KANTY-MANSIYSKY AUTONOMOUS REGION

The article describes the changes in the main tuberculosis rates in Khanty-Mansiysky Autonomous Region for the last 10 years. The main areas requiring major efforts and bottlenecks in tuberculosis control are highlighted, and the results achieved in the treatment of multiple drug resistant tuberculosis in this Russian region are presented. The article presents preliminary analysis of treatment efficiency of multiple drug resistant tuberculosis and changes in the epidemics of this most dangerous form of the disease given the introduction and active use of a new generation of anti-tuberculosis drugs