1. Faculty
of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan
Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia
2. Lee
Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, 43000 Kajang, Selangor, Malaysia