1. Assistant Professor, Dept. of Architecture and Building Science, Graduate School of Engineering, Tohoku Univ., Sendai, Miyagi, Japan 980-8579; formerly, Postdoctoral Fellow, Boundary Layer Wind Tunnel Laboratory, Faculty of Engineering, Univ. of Western Ontario, London, ON, Canada, N6A 5B9 (corresponding author).
2. Professor and Canada Research Chair in Wind Engineering, Boundary Layer Wind Tunnel Laboratory, Faculty of Engineering, Univ. of Western Ontario, London, ON, Canada N6A 5B9.