1. School of Industrial Technology, Universiti Sains Malaysia; 11800 Penang Malaysia
2. Federal Institute of Industrial Research Oshodi; Lagos Nigeria
3. Department of Mechanical Engineering; Syiah Kuala University; Banda Aceh 23111 Indonesia
4. Department of Civil Engineering; Universitas Sulawesi; Barat 90245 Indonesia
5. Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia; 43400 Serdang Selangor Malaysia