1. Engineer, Advitam Inc., Tokyo, Japan; formerly, Graduate Student, Dept. of Civil Engineering, Univ. of Tokyo.
2. Professor, Dept. of Civil Engineering, Univ. of Tokyo, 7-3-1 Hongo, Bunkyo-Ku Tokyo 113-8656.
3. Associate Professor, Dept. of Civil Engineering, Univ. of Tokyo, 7-3-1 Hongo, Bunkyo-Ku Tokyo 113-8656.