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Engines, Energy and ThermotechnicsMathematical model for heat transfer in variable thickness fins for rocket engines

Mathematical model for heat transfer in variable thickness fins for rocket engines

Mathematical model for heat transfer in variable thickness fins for rocket engines Volodymyr Sliusariev ORCID: https://orcid.org/0009-0004-2883-7467 Oles Honchar Dnipro National University Valerii Bucharskyi ORCID: https://orcid.org/0000-0002-8245-5652 Oles Honchar Dnipro National University Purpose. This article aims to develop a mathematical model for a fin in the cooling system of liquid propellant rocket engines. The objective is to enable calculations for fins with arbitrary thickness variation. The developed mathematical model will be valuable and in demand for calculating heat transfer in the chambers …

Engines, Energy and ThermotechnicsAnalysis of constructions and methods of calculation of fuel oil burners for heating systems

Analysis of constructions and methods of calculation of fuel oil burners for heating systems

Analysis of constructions and methods of calculation of fuel oil burners for heating systems Ihor Tokarskyi ORCID: https://orcid.org/0009-0009-4677-2210 Oles Honchar Dnipro National University Volodymyr Habrinets ORCID: https://orcid.org/0000-0002-6115-7162 Oles Honchar Dnipro National University Purpose. This article aims to show the principle and methodology of developing simple fuel oil burners for autonomous heating boilers that will provide room and water heating, making buildings independent of centralized heat supply. Design / Method / Approach. The research is based on the analysis of existing …

Project Management and LeadershipFinancial and economic consequences of the war for Ukraine

Financial and economic consequences of the war for Ukraine

Financial and economic consequences of the war for Ukraine Olena Lytvyn ORCID: https://orcid.org/0000-0003-3437-2067 Taras Shevchenko National University of Kyiv Purpose. The article explores the financial and economic consequences of the war with the Russian Federation for Ukraine. The focus is on assessing how businesses, government and other international stakeholders have responded to the various challenges posed by the war. Design / Method / Approach. According to the World Bank’s RDNA3 methodology, damage is the direct costs of destroyed or damaged …

Information Technology and CybersecurityVectorization of calculations for code optimization in the Python programming language

Vectorization of calculations for code optimization in the Python programming language

Vectorization of calculations for code optimization in the Python programming language Oleksii Zemlianyi ORCID: https://orcid.org/0009-0001-6157-8725 Oles Honchar Dnipro National University Oleh Baibuz ORCID: https://orcid.org/0000-0001-7489-6952 Oles Honchar Dnipro National University Purpose. The purpose of this study is to explore vectorization as an engineering technique to improve the performance and readability of Python code, particularly in data processing tasks. We aim to demonstrate the benefits of vectorization through practical examples involving the handling of missing data. Design / Method / Approach. To …

Ecology, industrial and environmental safetyMicroplastics in agricultural soils: sources and microbial remediation approaches

Microplastics in agricultural soils: sources and microbial remediation approaches

Microplastics in agricultural soils: sources and microbial remediation approaches Nataliia Tkachuk ORCID: https://orcid.org/0000-0002-5115-7716 T.H. Shevchenko National University “Chernihiv Colehium” Liubov Zelena ORCID: https://orcid.org/0000-0002-5148-1030 Danylo Zabolotny Institute of Microbiology and Virology Yaroslav Novikov ORCID: https://orcid.org/0009-0004-1576-6444 T.H. Shevchenko National University “Chernihiv Colehium” Purpose. The purpose of this study was theoretical analysis of the sources of microplastics in agricultural soils, its impact on agroecosystems and microbial remediation approaches to remove microplastics from the soil. Design / Method / Approach. Given the complex and …

Integrated Automation Technologies and RoboticsUsing micro:bit for building distributed sensor networks in robotic systems

Using micro:bit for building distributed sensor networks in robotic systems

Using micro:bit for building distributed sensor networks in robotic systems Roman Duban ORCID: https://orcid.org/0000-0002-6484-921X IT Step University Yurii Yurko ORCID: https://orcid.org/0009-0000-0833-3051 Kryvyi Rih National University Purpose. The purpose of the paper is to explore the possibilities of integrating the micro:bit microcontroller with external devices through UART, I2C, and SPI protocols to create modular and distributed sensor networks in robotic systems. The article focuses on the compatibility issues of these protocols with other devices and possible solutions. Design / Method / …