Computer-aided simulation of gas adsorption processes in nanopores

A computer-aided simulation of the behavior of molecular gas-phase hydrogen in spherical nanopores was accomplished. The calculations were performed within the frame of molecular dynamics. Interaction between hydrogen molecules is described on the basis of adaptive intermolecular reactive empirical bond-order (AIREBO) potential. The interaction of gas with the walls of nanopores was calculated using the Lennard-Jones potential. The paper also contains the calculated distributions of gas density and velocities of molecules for different temperatures and pressures. The paper states that the adsorption properties of gas systems in nanopores can be described by varying the parameters of the potential of interaction with pore walls

Integrated Security Issues in the Basic Principles of Russian Federation State Policy in the Arctic to 2035: Experience and Prospects for Implementation

March 5, 2020, President of Russia V.V. Putin approved the Basic Principles of Russian Federation State Policy in the Arctic to 2035. It is a strategic planning document aimed at ensuring the national security of the Russian Federation and designed to protect Russia’s interests in the Arctic. It defines goals, directions, tasks, as well as mechanisms for implementing Russian policy in the Arctic for the next 15 years. The authors analyzed the implementation results of the Basic Principles of Russia’s State Policy in the Arctic until 2020 and further perspectives. The article provides a general outline of the Basic Principles of Russian Federation State Policy in the Arctic to 2035. The authors focus on the analysis of the leading national security challenges in the Arctic and enhancing integrated security of the fuel and energy complex, as well as the main directions of the implementation of the state policy of the Russian Federation in the Arctic. They are the protection of the population and territories of the Arctic zone from natural and human-made emergencies, enhancing national security in the Arctic zone, ensuring the military security of the Russian Federation, and protection of the state border of the Russian Federation. It is emphasized that the comprehensive implementation of the Basic Principles will contribute to improving the quality of life of people in the Arctic zone, socio-economic development of the country, and increasing its defense capability in the Arctic

Computer-aided simulation of gas adsorption processes in nanopores

A computer-aided simulation of the behavior of molecular gas-phase hydrogen in spherical nanopores was accomplished. The calculations were performed within the frame of molecular dynamics. Interaction between hydrogen molecules is described on the basis of adaptive intermolecular reactive empirical bond-order (AIREBO) potential. The interaction of gas with the walls of nanopores was calculated using the Lennard-Jones potential. The paper also contains the calculated distributions of gas density and velocities of molecules for different temperatures and pressures. The paper states that the adsorption properties of gas systems in nanopores can be described by varying the parameters of the potential of interaction with pore walls

The role of artificial intelligence technologies in long-term socio-economic development and integrated security

The symbol of the second decade of the 21st century is the renaissance of artificial intelligence technologies. Today, the consequences of introducing such systems are still not fully understood (especially when the results prepared by the neural network are completely incomprehensible to humans, unlike the results of the logical conclusion of an expert system) in the informational and technological processes of modern society, but the question already concerns such issues as the "ethics of machine intelligence", about a person’s readiness to transfer the right to make decisions to artificial intelligence instead of himself. The object of the paper is to study strategic documents that determine the prospects for the development of artificial intelligence technologies, primarily in the largest economies of the world to determine the contours of global socio-economic and technological development. In the framework of the system-structural and institutional approaches, a comparative and conceptual analysis of the strategies of the leading countries in process of development of artificial intelligence was carried out. The mechanisms for implementing the strategic priorities of the most advanced countries are identified and described. Authors noted the intensification of international competition in the field of development and implementation of artificial intelligence technology and, accordingly, the transformation of complex security threats

Evolution of microstructure and microhardness of dispersion-hardened V-Cr-Zr-W alloy during deformation by torsion under pressure

Results of the study of the microstructural evolution and microhardness changes of dispersion-hardened V–Cr–Zr–W alloy under severe deformation during torsion on Bridgman anvils are presented. Typical structural states and mechanisms of their formation are revealed for basic evolution stages as well as appropriate microhardness values are determined. It was shown that at true logarithmic strain values (e) in the range 0.7 ≤ e 2, the anisotropic submicrocrystalline structure is observed and the formation of two-level nanostructural states was found within grains. In the strain range (e) from 3 to 6.6, submicrocrystal sizes hardly change, but changes of two-level nanostructural state parameters are observed: the nanofragment size decreases and values of elastic curvature of the crystal lattice increases

Microstructure and mechanical properties of V–Cr–Zr alloy with carbide and oxide strengthening

A comparative study of the effectiveness of carbide and oxide types of strengthening of V–Cr–Zr alloy was carried out by means of a comprehensive certification of structural-phase state parameters and measuring the mechanical properties characteristics. It has been shown that the use of chemical-heat treatment contributes to a significant increase in the thermal stability of the microstructure and mechanical properties of V–Cr–Zr alloy in comparison with carbide strengthening under the conditions of thermomechanical treatment. A controlled increase in the volume fraction of fine particles based on ZrO2, along with an increase in the concentration of oxygen in the solid solution, leads to a decrease in the rate of oxides coagulation and an increase in the thermal stability of high disperse heterophase structure. These effects contribute to the retention of high defect structural states with nonzero values of crystal lattice curvature even after high-temperature (0.67 Tmelt) anneals. The high efficiency of dispersion and substructural strengthening is a consequence of blocking dislocation slip by fine particles stabilized by oxygen in a solid solution

Influence of temperature on microstructure parameters and microhardness of dispersion-hardened V–Cr–Zr–W alloy after deformation by torsion under pressure

Study of microstructure transformation and microhardness changes of dispersion-hardened V–Cr–Zr–W alloy after severe plastic deformation by torsion on Bridgman anvils and subsequent heat treatments was conducted. Basic stages of relaxation processes were revealed: at 800°C recovery processes take place and primary recrystallization begins; at 900°C primary recrystallization intensifies; in range of 950–1050°C collective recrystallization processes activate; at 1200°C secondary recrystallization starts. Microhardness measurement and comparison of its values with structural states features were conducted. Strengthening mechanisms and their contribution at various stages of defect substructure relaxation are discussed. It is shown that increase of thermal stability of V–Cr–Zr–W alloy microstructure is a consequence of the formation of high density of thermally stable Zr (O–N–C)-based nanoparticles

Microstructure and mechanical properties of vanadium alloys after thermomechanical treatments

The results of investigation of dispersion strengthening effect on parameters of structural-phase states and characteristics of short-term strength and ductility of vanadium alloys of V–4Ti–4Cr, V–2.4Zr–0.25C, V–1.2Zr–8.8Cr and V–1.7Zr–4.2Cr–7.6W systems with different concentration of interstitial elements after optimized thermomechanical treatment mode were summarized. It was shown that for effective realization of dispersion strengthening by Orowan-type mechanism at least 25–50% of the initial volume fraction of coarse particles should be transformed into fine-disperse state and redistributed over the volume of material

Features of plastic deformation and fracture of dispersion-strengthened V-Cr-Zr-W alloy depending on temperature of tension

Influence of tension temperature on features of plastic deformation and fracture of V–4.23Cr–1.69Zr–7.56W alloy was investigated by scanning and transmission electron microscopy. It is shown that temperature increase leads t

Transformation of the Personnel Training System for Oil and Gas Projects in the Russian Arctic

This paper analyses the process of transforming specialist training systems for oil and gas projects in the Arctic, which has been taking place within the structure of education in Russia over the past decade. Using classical methods of analysis, synthesis, and classification, the authors studied the main global trends in training personnel for the Arctic and the manifestations of these trends in the system of training Russian specialists. To identify the qualitative characteristics of the educational system development, the authors applied the survey method and composed a list of leading universities in training personnel for the Russian Arctic, as well as the “Arctic professions of the future”. As a result of the study, the authors came to the conclusion that global trends in training “Arctic personnel” show the need to develop an interdisciplinary approach, to form basic knowledge in Natural Sciences, to study the socio-cultural specifics of the region, to develop new educational standards, to implement the concept of ‘Life Long Learning’, to widely introduce digital technologies and to internationalize education. In general, the Russian personnel training system is adapting to changing conditions, in particular, some progress has been made in the formation of “digital” competencies and skills to work in a developed IT infrastructure. The introduction of “digital fields” has led to an increase in the demand for IT specialists in the Arctic oil and gas sector. With the help of an expert survey, it was revealed that in the future, the most popular professions, along with “drillers” and transport specialists, will be IT specialists who ensure the “digital fields” functioning. The leading Russian universities that train specialists for modern oil and gas projects in the Arctic have been identified. It is noted that not all leading industry universities in Russia are participating in international educational projects and organizations. There is skepticism about the internationalization of education