1. Khon Kaen University,Faculty of Engineering,Department of Computer Engineering,Khon Kaen,Thailand
2. Khon Kaen University,Faculty of Engineering,Department of Electrical Engineering,Khon Kaen,Thailand
3. Champassak University,Scientific Research and Academic Services Office,Pakse City
4. Bansomdejchaopraya Rajabhat University,Western Music Department,Bangkok,Thailand