1. Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia
2. Department of Plant Science and Environmental Ecology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia
3. Department of Physics, Universiti Putra Malaysia, Serdang, Selangor, Malaysia