1. School of Industrial Technology, Universiti Sains Malaysia 11800 Penang, Malaysia,
2. School of Industrial Technology, Universiti Sains Malaysia 11800 Penang, Malaysia
3. School of Mechanical Engineering, Engineering Campus Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
4. Mechanical Engineering Department, Universiti Teknologi PETRONAS 31750 Tronoh, Perak, Malaysia
5. School of Housing, Building and Planning, Universiti Sains Malaysia 11800 Penang, Malaysia