The purposes of this study were to compare interaction and predict power of psychosocial factors affecting instructors’ behavior with biosocial characteristics. The subjects comprised 300 instructors at Rajamangala University of Technology Phra Nakhon during the 2nd semester of 2009 academic year. Questionnaires were used in this research. Data were analyzed and presented by percentage mean standard deviation analysis of variance Scheffe’ Method and Stepwise Multiple Regression Analysis. The results revealed that Instructors with high behavior as a principle of the sufficiency economy philosophy were instructors with high work socialization and achievement motive and with high group of psycho-social factors. Most of them were female instructors. Moreover instructors’ behavior as a principle of the sufficiency economy philosophy were predicted by work socialization self-ability perception according to a principle of the sufficiency economy philosophy and achievement motive

The research of the factors influencing people’s purchase of the book about sufficiency economy in Bangkok was aimed at studying 1) attitudes towards sufficiency economy 2) marketing factors and book purchasing behavior about sufficiency economy 3) sociological effects upon sufficient economy and 4) factors influencing people’s purchase of the book about sufficiency economy in Bangkok. The questionnaires were constructed as a tool for collecting data from 400 samples of the people in Bangkok who used to purchase the book about sufficiency economy. The results of hypotheses tests at the statistical significance of 0.05 showed that 1) awareness knowledge liking and preference in attitudes towards sufficiency economy had no influence upon a purchase of the book about sufficient economy 2) marketing factors including product price promotion and place had influence upon purchase of the book about sufficiency economy 3) sufficiency economy book purchasing behavior the number of the books about sufficiency economy had influence upon book purchasing behavior 4) morality and sufficiency aspect in sociological effects had influence on sufficiency economy book purchasing behaviors.

The purposes of this research were 1) to study the effect of short message service via mobile telephone on Sufficient Economy Philosophy of undergraduate students at Rajamangala University of Technology Thanyaburi 2) to study the students’ opinions to short message service via mobile telephone on Sufficient Economy Philosophy of undergraduate student at Rajamangala University of Technology Thanyaburi. The experiment group was 30 undergraduate students at Rajamangala University of Technology Thanyaburi in Educational Technology academic year 2007. The data were analyzed by percentage mean standard deviation and t-test. The research findings were as follows: 1) It was found that the post-test score learning was statistically higher than pre-test scores at level .01. 2) It was found that the students’ opinions to short message service via mobile telephone were in a good level.

The study of the efficiency of fuel consumption by adjusting the fuel injection pressure is basically one optimization method to maximize the engine combustion. In this current study the Honda wave 110 cc. engine has been used to test in particular the fuel injection by adjusting the pressure of injector. To control the pressure of injection was made by automatic valve injectors with three different pneumatic pressure which were 2 2.5 and 3 bars respectively and the similar running distance of 5km. The results showed that at 2 bars the obtained fuel saving was 1020.68 km/L and the speed at 25.23 km/h which corresponded to the highest CO2 emissions during the engine combustion.