Takenaga, K. 2000-2003 Scholar Born 1966 Oita, Japan. Ph.D. 1995 Kyushu University, Japan. Appointments: Research Associate, Osaka University, 2003-2005; Assistant Prof., Tohoku University 2006-Memberships: Physical Society of Japan. Address: Department of Physics, Tohoku University, Sendai 980-8578, Japan. E-mail: takenaga_at_tuhep.phys.tohoku.ac.jp