I had Mr. Wang Tianshu twice. The second one is a mistake. Steve -- Associate Professor Division of Policy and Planning Science http://turnbull.sk.tsukuba.ac.jp/ Faculty of Systems and Information Email: turnbull at sk.tsukuba.ac.jp University of Tsukuba Tel: 029-853-5175 Tennodai 1-1-1, Tsukuba 305-8573 JAPAN