1. Department of Biological and Chemical Engineering, Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515
2. Department of Computer Science, Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515
3. Department of Electrical and Electronic Engineering, Chuo University, Tokyo 112-8551
4. Department of Polymer Science, Faculty of Science, Sapporo 060-0810