1. Polytechnic University, 2-20-12-1304, Ryogoku, Sumida, Tokyo 130-0026, Japan
2. Saitama Prefectural Okubo Water Filtration Plant, Saitama 338-0814, Japan
3. Waseda University, Shinjuku, Tokyo 169-0855, Japan
4. IMR, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan
5. Yokohama Harbour Polytechnic College, Yokohama 231-0811, Japan
6. Polytechnic College Akita, Odate, Akita 017-0805, Japan
7. Yamagata College of Industry and Technology, Yamagata 990-2473, Japan
8. National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan