1. Universiti Teknologi Malaysia,Kuala Lumpur,Malaysia,54100
2. Universiti Teknologi Malaysia,phone: +60127001260,Department of Engineering Materials and Structure,Kuala Lumpur,Malaysia,54100
3. Universiti Putra Malaysia,Department of Physics,Serdang,Malaysia,43400
4. Universitas Gadjah Mada,Department of Mechanical Engineering,Yogyakarta,Indonesia,55281