1. Faculty of Chemical Engineering, Universiti Technologi MARA Cawangan Pulau Pinang, Malaysia
2. Faculty of Mechanical Engineering, Universiti Technologi MARA Cawangan Pulau Pinang, Malaysia
3. Faculty of Chemical Engineering, Universiti Teknologi MARA Cawangan Terengganu, Malaysia
4. School of Industrial Technology, Universiti Sains Malaysia, Malaysia