The design of plastic injection mold requires precision and efficiency of the injection. Therefore mold design engineers need to determine the size location and number of the gates to fit the length of the plastic flow in the work piece so that when the injection mold is built they’ll get the complete and specified specimen. This research was conducted to study the influence of injection flow channel thickness affects the flow index. Poly ethylene high density High density polyethylene HDPE was used in the experiments. The flow of plastic was Spiral Test according to ASTM: D 3123-94 with rectangular cross-sectional area of 6 mm. wide 6 mm. pitch. It was found that the thickness of the flow channel at 0.51.01.5 and 2.0 mm. which has the best flow rates at the best injection speed at 25% the injection pressure at 30% and the flow distance of 52 116 238 and 299 mm respectively with the plastic melting temperature between 190 C and 220 C.

This research aimed to transfer technology about biogas digester construction and applying the biogas in household to teachers and students in Suksasongkhro Tak school. They were instructed and trained about biogas digester construction and applying the biogas produced from animal manure on cooking in household to reduce using LPG. The research operations were separated to 4 phases. The first was preparation and making understanding. The second was instruction and practical training. The third was monitoring and project evaluation. The last one was organizing the science project event. The number of participant teachers and students was 330. From the result of 5 scale questionnaire in project evaluation it was found that the evaluation about knowledge and understanding showed the maximum scale ( = 4.42 SD = 0.84). The second was about location duration and food ( = 4.36 SD = 0.75). The evaluation about the knowledge showed the lowest scale ( = 4.28 SD = 0.77). For the project evaluation of success it was found that every biogas digester done by participants could produce the biogas and it could be use to replace LPG and reduce expenditure about 1400 – 1500 baht/month. The total construction cost of biogas production system was 58000 baht. So the payback period was 3.22 years.

This research is a qualitative research concerning phenomenology study which aims at the meanings of the opinions of those who have experienced the public relations of Rajamangala University of Technology Phra Nakhon (RMUTP) lecturers and international affairs officers in immigration procedures (visa extension and doing the-90 day report). The objectives of this research are to study (1) types (2) methods and (3) capabilities of public relations of RMUTP lecturers and international affairs division for the international students who are in this case Chinese students of Language and Applied Thai program Faculty ofLiberal Arts Rajamangala University of Technology Phra Nakhon. The samples of this research are (1) student advisors (2) lecturers of Language and Applied Thai program (3) international affairs officers and (4) Chinese students of Nanning College for Vocational Technology (NCVT) who are studying Language and Applied Thai program Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon. The researchers use in-depth interview and observation by participating procedures of public relations. This research started from October 2013 to October 2014. The researchers collected data 3 hours per day and 3 days per week within 53 weeks.

This research studied behavior of price clustering in Electronic Trading Transaction and Block Trading Transaction in Thailand Futures Exchange market from SET50 Index Futures using daily closing price data of SET50 index Futures from April 28 2006 to June 302012 Descriptive statistics and quantitative analysis included Chi-square to test Uniform Distribution; Hirshmann Herfindal Index(HHI) to measure price density standardized Range and Excess Clustering to measure price clustering; and Multiple Regression to test behavior of price Clustering. Results showed that the behavior of price clustering in SET50 Index Futures was characterized in the same way. That is the most frequent last two digits were 00 (32.31%) and 50 (13.82%) while other last two digits had the frequency of not greater than 8%. There was more price clustering along with the trading volume. It also found that the opening price the bid-ask spread. And the volatility had positive impacts on price clustering while the closing price had negative impact. For the total retum no impact was found on price clustering at the signicant level of 0.05

This research is to study the problems and barriers for cooperative education student trainee recruitment according to the work place’s concept the aspects of training management training format training students’ qualifications and training students’ knowledge. The population are owners of various workplaces who accept 180 fourth year undergraduate students in training. Questionnaires are used to collect data statistically analyzed by Percentage Mean and Standard Deviation. The findings of the research reveals problems and obstacles as follow : 1. For the training management aspect the workplaces are not able to cooperate with the university to set aims and prepare the students before training the workplaces do not recognize purposes of the university’s training course the suitable positions for the students are not provided by the workplaces. 2. For the training students’ qualifications the students are unlikely to make decision in their performances’ problem solving no self-confidence and carefulness in their performances. 3. For the training students’ knowledge the students are unable to analyze and plan their performances; they have not a good command of both written and spoken English and Thai. In addition they lack of vocational skills.