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 was to used Lanna wisdom project-based learning activities in sufficiency economy of sustainable development courses for undergraduate students Rajamangala University of Technology Lanna Chiang Mai. The objectives of this research were to development of Lanna wisdom project-based learning activities to study students’ learning achievement about local wisdom and to study students’ satisfaction towards Lanna wisdom project-based learning activities. The instruments were included lesson plans on local wisdom pretest and posttest using Lanna wisdom project-based learning activities tests assessment of students ability to present Lanna wisdom project-based learning activities according to actual conditions and students’ satisfaction towards Lanna wisdom project-based learning activities questionnaires. Research was assigned to students learning activity by Lanna wisdom project-based pretest and posttest using Lanna wisdom project-based learning activities tests evaluated students’ learning achievement and students’ satisfaction towards Lanna wisdom project-based learning activities. The research findings were as follows; 1. Lanna wisdom project-based learning activities was associated knowledge of Lanna wisdom with sufficiency economy for application in daily life 2. Students’ learning achievement about local wisdom in lesson 4 after using Lanna wisdom project-based learning activities are increase at statistically significant level of 0.01 and capable of Lanna wisdom project-based learning activities presentation at a higher level. 3. Student overalls satisfaction towards Lanna wisdom project-based learning activities at the highest level. The recommendation of research that universities should support of appropriate teaching curriculum by project-based learning activities.

The purpose of this research were 1) to study the environment of The Faculty of Industrial Textiles and Fashion Design at Rajamangala University of Technology Phra Nakhon as perceived by undergraduate students. in overall and 5aspects : lecturers teaching and learning management premises students services and students activities. 2) to compare perceived of the environment of the Faculty of Industrial Textiles and Fashion Design at Rajamangala University of Technology Phra Nakhon. In overall and 5 aspects classified by gender years of study student achievement and major of studies 416 under graduate students were used as samples. The instruments used in the study was a five-point 58 items rating scale questionnaire with the reliability of 0.97. The data were analyzed by mean percentage standard deviation and t-test. The results revealed that : 1) the environment of the Faculty of Industrial Textiles and Fashion Design at Rajamangala University of Technology Phra Nakhon as perceived by undergraduate students in overall and 5 aspects were at moderate level. 2) the environment of The Faculty of Industrial Textiles and Fashion Design at Rajamangala University of Technology Phra Nakhon as perceived by undergraduate students classified by gender years of study student achievement and faculties were significant different.

During the daytime solar cells can be used in terms of meteorology because the variations of the current obtained from solar cells are associated with changes in daily climate. The case study of the comparison between the surface temperature and the different current (Ipv_d) obtained from the solar cells in the periods of November 2011 to February 2012 which known as the winter period of Thailand had been conducted. The result showed that it was possible to observe the decreased surface temperature at the time that the increased Ipv_d was more than 6000 mA. Vice versa the decreased surface temperature would not be observed when the Ipv_d was below 6000 mA. The decreased surface temperature may reflect the influence of the traveling high pressure area moving to cover and collide with the steady-low pressure area at the study area. The result of the collision caused extensive cloud cover resulting in increasing Ipv_d.

Bamboo sawdust from chopstick production process was used as substrate for Indian oyster (Phoenix mushroom) cultivation. Experimental studies in cultivation material including wood sawdust bamboo sawdust and fermented chopped straw for 4 experiments - first experiment used 100 % of wood sawdust the second experiment used 25 % of bamboo sawdust mixed with 75 % of fermented chopped straw the third one used 50 % of bamboo sawdust mixed with 50 % of fermented chopped straw the forth one used 75 % of bamboo sawdust mixed with 25 % of fermented chopped straw and the last one used 100 % of bamboo sawdust. All experiments were analyzed for chemical properties nutrients in substrates for mushroom growing and yield of mushroom. The results showed that each type of mushroom substrate with different humidity. pH is suitable for use as a mushroom cultivation material. For quantity of nutrients in bamboo sawdust is more than wood sawdust. Increasing of nutrients is depending on increase fermented chopped straw. For mycelia growth in wood sawdust were faster than a bamboo sawdust culture. Yield of Indian oyster (Phoenix mushroom) found in any treatments. Especially in experiment 3 (50 % of bamboo sawdust mixed with 50 % of fermented chopped straw) is more suitable for Indian oyster (Phoenix mushroom) cultivation which compared to the other treatments because of highest yield mushrooms (175.11 grams per piece).