1. Faculty of Engineering, Department of Mechanical Engineering, University of Malaya, Kuala Lumpur, Malaysia
2. Advanced Shock and Vibration Research Group, Applied Vibration Laboratory, Block R, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
3. Faculty of Engineering, Department of Biomedical Engineering, University of Malaya, Kuala Lumpur, Malaysia
4. Faculty of Engineering, Department of Civil Engineering, University of Malaya, Kuala Lumpur, Malaysia