The effects of chlorine-organic insecticide endosulfane (thiodan) on phenotypic and genetic variation in four morphological traits of Drosophila melanogaster (wing length, thorax length, the number of orbital bristles and the number of sternopleural bristles) were examined. In addition, the effect of this pesticide on stability of development measured as fluctuating asymmetry of bilateral traits was estimated. On the medium with endosulfane, phenotypic variation of morphometric traits was significantly higher. No difference in fluctuating asymmetry between the stressed and the control samples was found. The among-line variance of morphometric traits of flies reared on the endosulfane-containing medium was significantly higher as compared to the corresponding variance under control conditions. The efficiency of using fluctuating asymmetry and phenotypic variation of morphometric and meristic traits as indicators of environmental stress in insect populations is discussed.
This study explores the use of unsupervised machine learning to optimize operational efficiency and reduce downtime in oil well production through clustering analysis. Using production data from a major Kazakhstani oil operator, the study applies K-means clustering to categorize oil wells based on output patterns. The dataset includes more than three million entries over a two-year period, capturing daily values for oil volume, liquid volume, and water cut percentage. Data preprocessing involved normalization, outlier handling, and correlation analysis to ensure robust clustering performance. The optimal number of clusters (K = 10) was selected using the Elbow method. Cluster interpretations revealed distinct operational profiles, including stable, declining, and volatile well behavior. In particular, more than 70% of wells remained in their assigned clusters over time, suggesting temporal stability and operational consistency. By identifying risk-prone and underperforming wells, the results support proactive maintenance, informed resource allocation, and long-term planning. The study demonstrates how unsupervised learning techniques can support data-driven decision-making in the petroleum industry without reliance on expensive sensor infrastructure. This research provides a replicable framework for oilfield analysis and highlights the value of behavioral clustering as a predictive tool for operational optimization. Our methodology integrates unsupervised learning, dimensionality reduction techniques, and visual analytics to provide interpretable cluster groupings. The enhanced predictive model demonstrates the potential to support data-driven decision-making and resource allocation in oilfield operations. © 2025 «OilGasScientificResearchProject» Institute. All rights reserved.
В статье представлен вычислительный (математический) модельный подход к термоэлектрической системе охлаждения головы человека. Рассматриваются тепловые процессы, происходящие в системе, и особенности распределения температуры при использовании элементов Пельтье. Разработанная модель позволяет анализировать эффективность охлаждения и оптимизировать параметры работы устройства для достижения стабильного температурного режима.
В статье рассматриваются виды устройств, предназначенных для охлаждения головы человека, и проводится анализ их эффективности в медицинской практике. Описаны существующие принципы работы устройств для гипотермии мозга, их преимущества и недостатки. Рассматриваются различные методы охлаждения, включая использование льда, воды и воздуха. Определена роль термоэлектрических устройств в системах охлаждения головы. Обоснована необходимость дальнейших исследований для разработки более эффективных и безопасных технологий локальной гипотермии мозга.
В статье рассматривается система управления током элемента Пельтье в термоэлектрическом охлаждающем устройстве, предназначенном для охлаждения головы человека. Разработанная система обеспечивает регулирование электрических параметров работы элемента Пельтье, что позволяет поддерживать стабильный температурный режим. Проведён анализ эффективности управления и показано улучшение работы охлаждающего устройства при использовании предложенного подхода.
Abstract The purpose of the study is to develop and evaluate the effectiveness of an innovative cargo fastening system using aramid fasteners to improve the safety and stability of cargo transportation. The research methodology included the analysis of existing solutions, the development of conceptual models, mathematical calculations, and the modelling of the system using three-dimensional models. In addition, this study paid special attention to the choice of fastening materials, such as aramid fibre, and analysed the strength characteristics of fasteners to ensure maximum safety of cargo transportation. As a result of the work conducted, an innovative cargo and object fixation system was created, which provides a high level of protection and safety for the cargo, allowing it to avoid damage and emergency situations during transportation. Notably, this system is able to effectively distribute the load and reduce the impact of inertial forces, ensuring stability and reliability during the transportation of goods of various types and sizes. An additional substantial advantage of this innovative solution is its versatility, which allows its successful use in various scenarios and conditions. The technical solution created is suitable for moving both light and heavy loads and can be effectively applied to various types of vehicles. Copyright: © 2025 Nadezhda Dolzhenko, Gulnar Imasheva, Assel Berkesheva, Olga Garmash, and Tasbulat Beketov. This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY 4.0) license.
Abstract Relevance. Currently, the standardization at the international level has reached a high stage in the aviation industry. The high requirements for standardization of airfreight refer to the safety and punctuality of air travel. Purpose. The purpose of this study was to modernize and improve the technology of consolidation of dangerous goods into fire-resistant unit load device containers, which will reduce the risk of fire spread, and enable the crew to make a landing in the event of an incident. Methodology. The basis of the methodological approach in this study is a combination of system analysis of the main areas of the introduction of fire-resistant containers in modern air transport, with an analytical investigation Suggested Citation: Imasheva G, Assilbekova I, Konakbay Z, Berkesheva A, Mambetalin D. Introduction of fire-resistant containers into airfreight. of the main areas of modernization of fire-resistant containers intended for the transportation of dangerous goods, which in the future will contribute to a significant reduction in the risks of fires during air transportation and other emergencies that may cause forced landings of air transport. Results. It was determined that the use of fire-resistant containers reduces fuel costs and environmental improvements by minimizing carbon dioxide emissions into the atmosphere. Conclusions. Thus, the developers of modern refractory materials used in the manufacture of air cargo containers have broad prospects. In addition, the use of such containers will improve working conditions due to their environmental friendliness. © 2023 Uzhhorod National University. All rights reserved.
Abstract In this article, the definition of the current density field at current collection was reduced only to the calculation of the thermal (resistive) action of the electric current. These procedures must include consideration of the bending stiffness of the contact wires to calculate the distribution of the pressing force on the contact wire between the current collecting plates. Therefore, it is necessary to improve the existing methods for calculating the dynamics of mechanical interaction of the current collector with the chain suspension. As a result of computer modeling in the Comsol Multiphysics software package, the volumetric power density of resistive heating from the intrinsic resistance of the contact wire was determined. © 2024 Seidulla Abdullayev, et al.