Vol. 1 No. 1 (2025): March 2025

The March 2025 edition of KOLECER Scientific Journal of Mechanical Engineering presents a diverse array of innovative research in the fields of engineering and applied technology, encompassing manufacturing optimization, industrial risk analysis, as well as the development of energy and transportation technologies. The first article introduces a novel model for determining end milling parameters based on screening tests conducted on AA6041 aluminum alloy, with the aim of enhancing both efficiency and accuracy in machining processes. Subsequently, a study on subsea pipeline replacement projects utilizing the HIRADC and FTA methods analyzes potential hazards and mitigation strategies to improve occupational safety. The optimization of a coconut husk peeler machine design with a capacity of 260 units per hour is also featured in this edition, with findings indicating increased efficiency within the coconut processing industry. In the transportation sector, research on hybrid electric bicycles equipped with a 60A Speed Control controller explores system performance, energy efficiency, and durability under various operational conditions. Another study addresses the optimization of combustion quality in coconut shell briquettes using the gravimetric method, aiming to enhance efficiency and durability as an alternative energy source. Additionally, the development of a control system for a transformer rectifier used in cathodic protection with dynamic loads is proposed as a solution to manage corrosion in industrial systems operating under extreme conditions. Lastly, a study on impeller design for a centrifugal pump with five blades driven by a 40 cc four-stroke gasoline engine provides optimal design recommendations to improve system performance and efficiency across a range of engineering applications. Through these in-depth investigations, the March 2025 edition is expected to deliver significant scholarly contributions to both academics and practitioners in the field of engineering and related industries. Editorial TeamKolecer Scientific Journal of Mechanical Engineering