1. Department of Civil Engineering, Faculty of Engineering Universiti Putra Malaysia, 43400 UPM Serdang, Selangor D. E., Malaysia
2. Department of Architecture, Faculty of Design and Architecture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor D. E., Malaysia
3. Department of Mechanic, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor D. E., Malaysia