This research work was to study the chemical release of wood/polyvinylchloride composites (WPVC) affecting the physical and chemical properties of water. WPVC specimens in ratio of PVC and wood (100:100 by weight) were prepared by using twin screw extruder. The water conditions for specimen immersion testing were varied for temperatures of 30-70 oC and specimen immersion time of 0-120 h. The water quality was estimated by measuring pH electrical conductivity turbidity and color of water after immersion of WPVC specimen as comparing with case of PVC specimen. The result suggested that pH values of water slightly decreased with increasing specimen immersion time whereas the change of temperature of water did not affect the pH value. The electrical conductivity remained unchanged with increasing specimen immersion time or temperature except for immersion of WPVC specimens at 70 oC. This might be attributed the weak interfacial bonds between PVC and wood and this led to more easily release the metal ions from additives of PVC. The turbidity and color of water for case of WPVC increased with increasing specimen immersion time whereas those for case of PVC did not change. From the results of water quality testing it indicated that WPVC applications which contact with water are safety. This was because water quality after immersion of WPVC specimen is within the effluent standards of pollution control department.

The purpose of this study was to study and compare services marketing mix factors affecting students’ decision to pursue study at undergraduate level in faculty of science and technology of Rajamangala University of Technology Phra Nakhon in 7 aspects: product price place promotion people process and physical evidence. The undergraduates were classified by gender major subjects educational background department of education achievement and domicile. The samples in this research were 93 undergraduates. The study participates selected by stratified random sampling and simple random sampling. The 84 item questionnaires of rating scales was used as the research instrument. Percentage mean standard deviation t - test for independent sample F – test and Scheffe’s test analysis were statistical method to analyze data. The results were as follows: 1. Services marketing mix factors affecting students’ decision to pursue study at undergraduate level in faculty of science and technology of Rajamangala University of Technology Phra Nakhon all aspects were in moderate levels that price was the highest while process and promotion was in the lowest rank. 2. There was significant difference for services marketing mix factors affecting students’ decision to pursue study at undergraduate level in faculty of science and technology of Rajamangala University of Technology Phra Nakhon at the 0.05 level among undergraduates in different gender different academic years different educational background and different achievement. 3. There was non significant difference for services marketing mix factors affecting students’ decision to pursue study at undergraduate level in faculty of science and technology of Rajamangala University of Technology Phra Nakhon in different department of education and different domicile.

Recent explorations of Podostemaceae have discovered 2 new species to science (Dalzellia TWA-216 และ Hydrobryum TWA-198) from Phitsanulok Province and 3 more genera and six more species from previously known (2 genera and 4 species). Totally five genera and 10 species occur in Phitsanulok and Phetchabun provinces. Based on morphological and molecular evidence the taxa are classified into subfamily Tristichoideae including 2 genera and 3 species (Dalzellia 2 spp. and Terniopsis 1 sp.) and subfamily Podostemoideae consisting 3 genera and 7 species (Hanseniella 1 sp. Hydrobryum 5 spp. and Thawatchaia 1 sp.). The species found in both provinces are Hy. phetchabunense and Hy. tardhuangense while D. kailarsenii is found only in Phetchabun. The plants discovered only in Phitsanulok include Dalzellia TWA-216 Hydrobryum TWA-198 Han. heterophylla Hy. bifoliatum Hy. kaengsophense Th. trilobata and T. minor. Among the species found Hy. tardhuangense and Th. trilobata are also distributed to the Lao PDR and the rests are endemic to Thailand.

Objectives of this research were 1) to study the environment of coopertive education program of the Faculty of Science and Technology Rajamangala University of Technology Phra Nakorn and 2) to study the achievement of this cooperative education program towards the development of graduates competency in the first semester of academic year 2013. Three sampling groups were from educational institutes enterprises and students. The number was 240 in total. Tools used in the research was a questionnaire opened and closed form number 4 sets were 1) questionnaire for coordinator or cooperative education officer advisor and lecturers 2) questionnaire for the executives coordinators or heads of human resources 3) questionnaire for employees consultant 4) questionnaire for cooperative education students. Performance analysis of cooperative education in the part of educational standard and the operation of science and technology using the content analysis method to comparing their content to the standard of Thai Association for Cooperative Education. To study satisfaction by using application program for statistical analysis such as frequency percentage mean standard deviation of mean values and descriptive discussion. The overall findings form this study showed that every relevant had high satisfaction with the management of the Cooperative Education Program of the Faculty of Science and Technology Rajamangala University of Technology Phra Nakorn.

This article presents the application of the constant Volts per Hertz control to control a three phase induction motor has torque and speed characteristics similar to wind turbine. Due to this method is not complicated and does not require the parameters of motor. As a result the accuracy of control is independent of variation of the parameters of motor. Furthermore the equation for compensate the difference between the moment of inertia of wind turbine and motor which is consistent with the mentioned control method is proposed. In order to make the dynamic responses of the wind turbine simulator similar to the wind turbine and to overcome the problems of noise amplification from differentiation that leads to instability of the system. The simulation results in Matlab/Simulink program show that the proposed wind turbine simulator can imitate the wind turbine accurately both in dynamic and steady state conditions