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Structural and Functional MaterialsNon-metallic inclusions study and characteristics of KP-T wheel steel under the influence of modification

Non-metallic inclusions study and characteristics of KP-T wheel steel under the influence of modification

Non-metallic inclusions study and characteristics of KP-T wheel steel under the influence of modification Serhii Polishko ORCID: https://orcid.org/0000-0003-4388-2317 Oles Honchar Dnipro National University Tetiana Nosova ORCID: https://orcid.org/0009-0009-1591-8811 Oles Honchar Dnipro National University Stella Mamchur ORCID: https://orcid.org/0009-0004-1600-6068 Oles Honchar Dnipro National University This article dials with railway wheels production for trains on carbon wear-resistant steels. With increasing global demands and fierce competition, there arises a need to explore alternative solutions for enhancing the quality of such wheels beyond traditional methods like …

Aerospace vehiclesSynthesis of design and technological solutions in the development of UAV launch system

Synthesis of design and technological solutions in the development of UAV launch system

Synthesis of design and technological solutions in the development of UAV launch system Artem Shvets ORCID: https://orcid.org/0009-0006-7637-9143 Oles Honchar Dnipro National University Ihor Bilotserkovskyi ORCID: https://orcid.org/0009-0009-5102-7864 Oles Honchar Dnipro National University Oleksii Kulyk ORCID: https://orcid.org/0000-0002-2913-4462 Oles Honchar Dnipro National University Oleksandr Dobrodomov ORCID: https://orcid.org/0009-0005-9926-6638 Oles Honchar Dnipro National University This scientific paper examines the process of launching unmanned aerial vehicles (UAVs) using a solid-fuel rocket engine. The primary focus is on analyzing the design and technological aspects and advantages of …

Aerospace vehiclesEvaluation of the feasibility of using aerodynamic de-orbiting systems depending on the orbit altitude

Evaluation of the feasibility of using aerodynamic de-orbiting systems depending on the orbit altitude

Evaluation of the feasibility of using aerodynamic de-orbiting systems depending on the orbit altitude Anatolii Abaturov ORCID: https://orcid.org/0009-0007-7402-3909 Oles Honchar Dnipro National University This article is devoted to analyzing and evaluating the feasibility of using aerodynamic systems for space object deorbiting depending on the orbital altitude. The study’s main purpose is to determine the orbital altitude at which the use of aerodynamic systems is appropriate. In the process of research were analyzed modern scientific works devoted to developing such systems. …

Engines, Energy and ThermotechnicsDifferential model of the LPRE chamber cooling channel

Differential model of the LPRE chamber cooling channel

Differential model of the LPRE chamber cooling channel Valerii Bucharskyi ORCID: https://orcid.org/0000-0002-8245-5652 Oles Honchar Dnipro National University Volodymyr Sliusariev ORCID: https://orcid.org/0009-0004-2883-7467 Oles Honchar Dnipro National University In a liquid rocket engine, the cooling channels of the chamber significantly impacts various system parameters. It limits the permissible mass ratio of fuel components, affects the required pump power, and largely determines the layout and weight of not just the chamber, but the entire engine. Consequently, due to the numerous interrelated parameters, making …

Ecology, industrial and environmental safetyStudy of factors affecting the environment of the disturbed areas of the earth’s surface of existing tailings dumps

Study of factors affecting the environment of the disturbed areas of the earth’s surface of existing tailings dumps

Study of factors affecting the environment of the disturbed areas of the earth’s surface of existing tailings dumps Olena Minko ORCID: https://orcid.org/0000-0003-1648-2975 M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine Taking into account the geochemical and mineralogical features of “tailings”, as well as the duration and conditions of their storage (wet, covered with water – in the initial stages and dry, open to wind erosion – in the future), the tailings repository is constantly …

Project Management and LeadershipThe personnel management system of the organization in the conditions of martial law and the main directions of its improvement

The personnel management system of the organization in the conditions of martial law and the main directions of its improvement

The personnel management system of the organization in the conditions of martial law and the main directions of its improvement Anastasiia Radchenko ORCID: https://orcid.org/0009-0001-0837-8660 Oles Honchar Dnipro National University Oleksii Dzhusov ORCID: https://orcid.org/0000-0001-8600-4122 Oles Honchar Dnipro National University During periods of martial law, organizations encounter distinct challenges in sustaining effective personnel management systems. The enforcement of martial law frequently disrupts standard operations, creating significant obstacles for workforce management and organizational stability. The sudden imposition of new regulations and the heightened …