1. Ph.D. Candidate, Sirindhorn International Institute of Technology, Thammasat Univ., Bangkok 10200, Thailand.
2. Senior Ph.D. Candidate, Sirindhorn International Institute of Technology, Thammasat Univ., Bangkok 10200, Thailand.
3. Professor, Sirindhorn International Institute of Technology, Thammasat Univ., Bangkok 10200, Thailand (corresponding author).