1. King Mongkut's Institute of Technology, Ladkrabang Prince of Chumphon Campus,Department of Engineering,Chumphon,Thailand
2. Research Center of Innovation Digital and Electromagnetic Technology (iDEMT), King Mongkut's University of Technology North Bangkok,Faculty of Technical Education,Department of Teacher Training in Electrical Engineering,Bangkok,Thailand
3. School of Engineering, King Mongkut's Institute of Technology Ladkrabang,Bangkok,Thailand