The extended family of the Department of Physics Education expresses its deepest condolences on the death of Mr. Dr. Warsono, M.Si., one of the lecturers at the Department of Physics Education, Faculty of Mathematics and Natural Sciences (FMIPA) UNY, on Saturday, December 30, 2023 at 16.30 WIB at Panti Rapih Hospital, DIY. Dr. Warsono died at the age of 55 years. May his deeds of worship be accepted by Allah SWT, all his sins and mistakes be forgiven, and the family left behind to be given the best possible patience and fortitude. Amen, amen, robbal'alamin.