1. Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jln Universiti, Bandar Barat, Kampar, Perak 31900, Malaysia
2. Nippon Institute of Technology, Miyashiro-Machi, Saitama-Ken, Japan
3. Emeritus Professor, University of Tsukuba, Tsukuba, Ibaraki, Japan
4. Tokyo Metropolitan College of Industrial Technology, Arakawa, Tokyo, Japan