PSA-stage Features of the Hybrid Membrane-sorption Oxygen Concentrator

The paper considers the principle of the organization of the hybrid membranesorption oxygen concentrator and the work of the PSA stage of the hybrid system. The use of hybrid membrane-sorption gas separation systems can significantly reduce the energy consumption of plants, as well as to neutralize such disadvantages as contamination of the product flow by the products of abrasion of sorbents, through the use of highly selective polymer membrane, and the restriction on the oxygen concentration when using a single membrane stage, through its use after the PSA stage. In this paper, we propose an arrangement for the operation of the PSA stage of a hybrid system consisting of three adsorbers and providing a constant product flow of the PSA stage necessary to ensure continuous feed flow to the membrane stage of the system. Each of the adsorbers in this system passes through three main stages: filling, displacement (adsorption), and discharge (desorption). Moreover, the filling is not from the compressor, but part of the product flow of the displaced adsorber. The results of the operation of the system organized by the proposed method are compared with the results of the operation of modern gas separation systems on the market.     Keywords: Sorption, air separation, pressure-swing adsorption, PSA, hybrid technologies, oxygen concentrator, recycling, oxyge

Prerequisites, International Context and Features of NATO’s Proxy War against Russia in Ukraine (2022–2023)

The purpose of the article is to clarify the prerequisites, international context, and features of the armed conflict in Ukraine, which in the conditions of a Special Military Operation (SVO) has acquired the character of a protracted and exhausting proxy war between Russia and NATO countries. By now, Russian social scientists have generally developed an adequate understanding of the causes of the war and the goals of the warring parties. Their methodological position is clear and is mainly determined by political attitudes that have been repeatedly voiced by the President of the Russian Federation, the Head of the Russian Foreign Ministry, other senior officials, and representatives of interested departments. As a rule, this does not raise questions since the official Russian position is not actually imbued with ideology. At the same time, the publications of Western political scientists, experts, and journalists, especially those who adhere to the realistic paradigm, deserve attention. Their assessments and forecasts contribute to the formation of an objective picture of the Ukrainian crisis. During the study, it was found that the intentions of the NATO countries led by the United States, and, therefore, the background of their rivalry with Russia, have not changed during the SVO. They still expect to inflict a strategic defeat on our country and thereby prolong the existence of a unipolar world. Believing in Russia’s weakness, Western elites associate the end of the conflict with the victory of the Kiev regime on the battlefield. Therefore, the United States and its NATO allies continue to saturate Ukraine with more and more modern weapons. The main sponsor and organizer of the ongoing war is the United States, which pays two-thirds of Ukrainian military expenses. At the same time, their behavior is characterized by caution and even a certain responsibility. The United States fears an uncontrolled escalation of the conflict, every time it emphasizes its non-involvement in military actions and seeks to localize them within the borders of Ukraine. Even though the Russian Federation is also wary of striking at the territory of NATO countries, the conflict between them continues to develop in an escalating spiral. The war is gradually moving beyond the mediated relations between Russia and the countries of the North Atlantic Treaty Organization. With the expansion of supplies of increasingly destructive weapons and the direct involvement of NATO members in the confrontation with the Russian military, it acquires a full-fledged character with the prospect of going beyond the borders of Ukraine and using unconventional weapons

The analisis of the standards for decision of surgical treatment proximal humeral. Anatomical research

The article provides information about habits of the routes to the proximal humeral for people with different constitution. The clinical studies were made on 55 corpses, which were put in order of constitution, body mass and shoulder-elbow length. Results of studies have shown us that for people with normal body mass better to use anterior approach in a case of fracture with breaking of the proximal humerus, transdeltoid rout for people with transvers fractures of collum and low bone mineral density. As for people with subnormal body an anterior approach is more convenient than transdeltoid rout, and for patients with overweight and lipotrophy of the I degree selection of the rout depends on character of the fracture and optimal method of the osteosynthesis