1. Department of Physics, Fac. of Science, Shizuoka University (emeritus professor), Suruga-ku, Shizuoka, Japan
2. Department of Chemistry, School of Education, Shizuoka University, Suruga-ku, Shizuoka, Japan
3. Department of Chemistry, Graduate School of Science and Technology, Shizuoka University, Suruga-ku, Shizuoka, Japan
4. Department of Physics, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh