I would like to express my sincere thanks to my Job supervisor, Miss. Pimwalan Pakdeemai for her invaluable help and constant encouragement throughout the course of this report. I am most grateful for her teaching and advice, not only the report methodologies but also many other methodologies in life. I would not have achieved this far and this report would not have been completed without all the support that I have always received from her.
In addition, I am grateful for the Co-Operative Education Advisor Dr. Sorraphaksorn Chattrakamonlatas. Assistant Dean of Co-Operative Education Mr. Samart Plangpramool, and Job supervisor Miss. Pimwalan Pakdeemai for suggestions and all their help.
Finally, I most gratefully acknowledge my parents and my friends for all their support throughout the period of this Co-Operative Education Report.