1. Department
of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-8656, Japan
2. Alumina Fiber & Inorganic Products Department, Mitsubishi Plastics, Inc., 1-1-1, Marunouchi, Chiyoda-ku, Tokyo 100-8252, Japan
3. Institute
of Industrial Science, The University of Tokyo, 4-6-1 Komaba,
Meguro-ku, Tokyo, 153-8505, Japan