1. Department
of Mechanical Engineering, Faculty of Engineering, Universiti Malaysia Sarawak (UNIMAS), 94300 Kota Samarahan, Sarawak, Malaysia
2. Department
of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
3. Department of Manufacturing & Materials Engineering, International Islamic University Malaysia 53100 Kuala Lumpur, Malaysia