1. Rajamangala University of Technology Suvarnabhumi,Faculty of Engineering and Architecture,Nonthaburi,Thailand
2. King Mongkut's University of Technology North Bangkok,Faculty of Applied Science,Department of Industrial Physics and Medical Instrumentation,Bangkok,Thailand,10800
3. King Mongkut's University of Technology North Bangkok,Faculty of Engineering,Departmemnt of Electrical and Computer Engineering,Bangkok,Thailand