1. Ph.D. Candidate, Dept. of Mechanical Engineering, National Univ. of Singapore, 3 Engineering Dr. 2, Singapore 117578, Singapore.
2. Associate Professor, Dept. of Mechanical Engineering, National Univ. of Singapore, 9 Engineering Dr. 1, Singapore 117575, Singapore (corresponding author).
3. Senior Research Scientist, Temasek Laboratories, National Univ. of Singapore, 5A Engineering Dr. 1, Singapore 117411, Singapore.