About the Authors

Koichi Nagafuchi

Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan

Atsushi Nagira

Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan

Hidenori Akiyama

Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan

Mitsuru Sasaki

Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan

Kunio Kawamura

Hiroshima Shudo University, Hiroshima, Japan

Corresponding Author

Email: msasaki@kumamoto-u.ac.jp