Announcement for the 6th CRiES Seminar of FY2025 ・Date & Time: Tuesday, October 14, 2025, from 17:00・Venue: Online (via MS Teams)・Speaker: Takeji Sakae (Department of Radiation Effect Medicine)・Title: On the Biological Effectiveness Ratio ★ This seminar is open to participants outside the center.If you wish to attend, please contact Prof. Takeji Sakae at:tsakae@md.（please add tsukuba.ac.jp）