Komang Widhi Widantha, S.T., M.T. is a lecturer and researcher in the field of mechanical and materials engineering at Politeknik Negeri Bali. His research interests focus on material characterization, environmentally friendly materials, green technology, hydroxyapatite-based biomaterials, corrosion and surface engineering, as well as filtration and wastewater treatment materials. He is also actively involved in vocational education development, laboratory management, scientific publication, and international conference organization. In addition to research activities, he has experience in non-destructive testing (NDT), engineering design, and applied mechanical engineering for vocational and industrial applications.