https://supportscience.uz/index.php/ojpm <p><a href="http://sjifactor.com/passport.php?id=22038"><strong>SJIF 2021-5.778, 2022-5.912</strong></a></p> <p><strong>“</strong><strong>Oriental Journal of Physics and Mathematics</strong><strong>”</strong> is a journal specializing in mathematics and physics, comprehensive coverage of scientific and practical innovations in higher mathematics, mathematics and analysis, trigonometry, streometry, computer science, applied mathematics, geometry, quantum physics, optics, acoustics, mechanics and in the field of mathematics and physics.</p> <p>The main goal is to more fully meet the needs for scientific innovations and information in the sciences, the wide and effective use of the potential of the journal. One of the most important tasks in the field of mathematics and physics is the publication of up-to-date and verified information.</p> <p>This scientific journal is published in the electronic version, comes out 6 times a year in Uzbek, English and Russian.</p> <p>The editors inform students about current events and news in the field of domestic and foreign agricultural sciences. At the same time, the best scientific and journalistic works of our country, as well as representatives of the world economy and agriculture, are published in the journal.</p> en-US info@supportscience.uz (Supportscience LLC) info@supportscience.uz (Supportscience LLC) Wed, 01 Mar 2023 00:00:00 +0000 OJS 3.3.0.4 http://blogs.law.harvard.edu/tech/rss 60 https://supportscience.uz/index.php/ojpm/article/view/652 <p>The article talks about how many hours are allocated to the department of molecular physics and thermodynamics in the teaching program of physics in academic lyceums, and the use of interactive methods in teaching this department. In addition, the ways of using one of the interactive methods "CASE-STADY" method were considered in detail.</p> Sanobar Siddikova Copyright (c) 2023 Sanobar Siddikova https://creativecommons.org/licenses/by/4.0 https://supportscience.uz/index.php/ojpm/article/view/652 Fri, 02 Jun 2023 00:00:00 +0000 https://supportscience.uz/index.php/ojpm/article/view/655 <p>This article considers the dynamically stress-strain state of two-layer viscoelastic cylinders under internal (or kinematic) excitation. The relationship between stress and strain is satisfied by the Boltzmann-Volterra integral relations. The problem is reduced to a plane problem of the theory of viscoelasticity. The stated problem is solved by the Green-Lamb potential method. The resulting integro-differential equations in partial derivatives are solved using special Bessel and Hankel functions of the 1st and 2nd kind of the nth order. Solutions are expressed in terms of special functions of the complex argument. To determine the integral constants, a system of algebraic equations with complex coefficients is obtained. Numerical solutions are obtained and an analysis is made. The relevance of the study of the stress-strain state of structures under the action of dynamic loads, taking into account the viscoelastic properties of the material, is due to their widespread use in modern mechanical engineering. A typical example of such structures is a viscoelastic cylinder with a centrally located channel (cylindrical or non-trivial geometry). The body is made of materials with high specific strength. Composite materials are used depending on the purpose of the rocket, its size and operating loads.</p> Anvarbek Sh. Ruzimov Copyright (c) 2023 Anvarbek Sh. Ruzimov https://creativecommons.org/licenses/by/4.0 https://supportscience.uz/index.php/ojpm/article/view/655 Tue, 06 Jun 2023 00:00:00 +0000