I would also like to thank a chair of the Examinations Committee Lect. Smitti Darakorn Na Ayuthaya, and a member of the Examinations Committe Asst. prof. Kairoek Choeychuen, Professor of the Faculty of Engineering, Rajamangala University of Technology Rattanakosin, for taking the time to consider the valuable substances thematic paper with practical advice, to thematic paper completed