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Actual problems of Mathematics, Physics and Mecanics
A COMPARATIVE ANALYSIS OF HYDROGEN TECHNOLOGY DEVELOPMENT IN SOUTH KOREA AND ITS APPLICABILITY TO UZBEKISTAN
The development of hydrogen energy technologies has gained global momentum as countries seek sustainable and low-carbon alternatives to conventional fossil fuels. This paper presents a comparative analysis of hydrogen technology development in South Korea and its applicability to the emerging...
3 April 2025, 21:50
A MATHEMATICAL INVESTIGATION OF THE PROCESSES OF SALT AND MOISTURE DISTRIBUTION IN SOIL BASED ON A CROSSDIFFUSION MODEL
This paper presents a mathematical modeling approach for simulating coupled salt and moisture transport in soil using a cross-diffusion system of equations. The study highlights the relevance of salinization and the disruption of the water-salt balance in agricultural land. The developed model...
3 April 2025, 21:50
MATHEMATICAL MODELING OF THE SELF-FOCUSING EFFECT OF HIGH-INTENSITY LASER BEAMS IN A NONLINEAR DIELECTRIC MEDIUM
This article investigates the self-focusing effect of high-power laser beams in a nonlinear dielectric medium through mathematical modeling. The nonlinear Schrödinger equation (NLSE) was used as the core model and numerically solved in one-dimensional space using Python. Simulation results...
3 April 2025, 21:50
PHASE MAGNETIC TRANSITIONS IN SILICON DOPED WITH MANGANESE AT LOW TEMPERATURES
This article explores the phase magnetic transitions in silicon doped with manganese (Mn) at low temperatures. The research focuses on the mechanisms of magnetic ordering, the impact of Mn clusters on the magnetic properties of silicon, and the practical potential for spintronic devices. The...
3 November 2024, 21:50
PULSATING FLOW OF ELASTIC VISCOUS FLUID IN A FLAT CHANNEL WITH CONDUCTIVE WALLS
In this article, the equations of fluid motion are given using the rheological laws of the fluid. The equations of motion are solved using boundary conditions. The effects necessary for the movement of liquids in pipes with permeable walls were obtained. In the obtained effects, the pulse wave...
3 November 2024, 21:50
OPTIMIZATION OF CORONA PLASMA REACTOR FOR ENHANCED ENVIRONMENTAL AND ENERGY APPLICATIONS
This study explores the performance of honeycomb plasma reactor, focusing on key parameters such as monolith size, feed gas water content, and temperature. The experimental investigations reveal the critical role of reactor geometry and operational conditions in optimizing discharge power,...
3 November 2024, 21:50
COLD PLASMA SYSTEMS: PRINCIPLES AND APPLICATIONS
Nonthermal plasma technology has emerged as a versatile tool for environmental remediation, energy conversion, and chemical processing due to its ability to generate reactive species at low bulk gas temperatures. One of the most promising advancements in this field is the integration of nonthermal...
3 October 2024, 21:50
PROBLEMS AND PROSPECTS FOR THE USE OF CONCENTRATED ENERGY PLANTS WITH PHOTOCONVERTERS
The efficiency of solar energy conversion using semiconductor elements is being developed in the following areas: increasing the efficiency of photovoltaic cells through the search for new materials and methods of their processing; use of solar energy concentrators; development of solar orientation...
3 October 2024, 21:50
CHANGES IN THE ELECTROPHYSICAL PROPERTIES OF THE SEMICONDUCTOR-DIELECTRIC BOUNDARY REGION UNDER THE INFLUENCE OF AN EXTERNAL FIELD AND ITS EFFECT ON THE CHARACTERISTICS OF FIELD-EFFECT TRANSISTORS
In this article, it is theoretically analyzed that when there are surface states and there is no external voltage, the energy zones of the semiconductor are bent, that is, there is an electric field introduced at the border of the semiconductor-dielectric separation. The presence of such a field...
3 October 2024, 21:50
TWO-DIMENSIONAL TRANSIENT HEAT TRANSFER PROBLEMS FOR INHOMOGENEOUS BODIES SIMULATED USING FEM
The process of heat transfer in a plate of inhomogeneous material is investigated in the article, based on the solution of a two-dimensional problem of heat conduction by the finite element method. Straight-sided finite elements are used to solve the plane problem of heat conduction. Basic...
3 October 2024, 21:50