1. Faculty of Engineering Universiti Malaysia Sarawak Jalan Datuk Mohammad Musa Kota Samarahan Sarawak Malaysia
2. Nigerian National Petroleum Corporation NNPC Corporate Headquarters Abuja Nigeria
3. Polymer Technology Section Universiti Kuala Lumpur Malaysia ‐ Institute of Chemical and Bioengineering Technology Alor Gajah, Melaka Malaysia
4. Institute of Engineering and Technology, Department of Hydraulics and Hydraulic and Pneumatic Systems South Ural State University Lenin Prospect 76 Chelyabinsk Russia