This paper presents a prototype of solar powered aerator for public reservoir which consist of three main parts first aerator-venturi type second electrical system from solar panels and third floating structures. The proposed aerator has been adopted from an used electric water pump to have a water inlet an air inlet and mixture air and water outlet releasing bubbles through under water. Electrical system acting as the core energy resource receives light of solar energy via 2x120 watts solar panels and then accumulating the obtained electric energy to battery. The 24-volt battery will supply power to 150 watt directed current motor for driving the venturi aerator. To archive evaluation the combined aerator with solar system has been installed at Nong Luang reservoir in Muang Tak province and has operated for 30 minutes. To collect water samples have been done twice times at before and after operation. The obtained laboratory results show that dissolved oxygen (DO) increased from 0.87 mg/l to 3.56 mg/l and the biological oxygen demand (BOD) decreasee from 9.7 mg/l to 7.2 mg/l. According to the results it confirms that the proposed solar powered aerator for public reservoir can operate efficiently and independently.

The purposes of this research were as follows: 1) to construct and find an efficiency of the development of social service model instruction to enhance public consciousness on sufficiency economy for bachelor students as the 80/80 standardized criterion efficiency 2) to find the effectiveness index of the development of social service model instruction to enhance public consciousness on sufficiency economy for bachelor students 3) to compare pretest scores and post-test scores all lessons 4) to study the satisfaction of students after they join the class 5) to study the attitude of students after they join the class and 6) to find the retention of students after join the class in two weeks. The sixty students were area on simple random sampling selected from students in Rajamangala Technology University. The results the study was as follows: 1) An efficiency of the development of social service model instruction to enhance public consciousness on sufficiency economy for bachelor students was 82.54/82.11 which higher than the 80/80 standardized criterion efficiency. 2) The efficiency index of the development of social service model instruction to enhance public consciousness on sufficiency economy for bachelor students was 0.7246. 3) The results of the comparisons of pre-test scores and post-test scores all lesson significantly different at 0.05. 4) The results of the satisfaction of the development of social service model instruction to enhance public consciousness on sufficiency economy for bachelor students was found to be a high level. 5) The retention of the teachers after join the class in two was no significantly different.

The objectives of this survey research are to study perception participation and relationship of the factors influence the participation in food safety program. The population was health personnel with purposive sampling represented 30 samples. The tools were questionnaire and descriptive statistics included percentage and chi square test in which to analyze the relationship of the factors influence the participation. The result of this study revealed that the valid perception of the health personnel in 4 aspects of food safety program consisted of perception in danger of food contamination perception of food sanitation perception of best practices and utilities of food safety and perception of threads were generally in the moderate level. The samples participated in every steps of the food safety program which consisted of planning implementation and evaluation revealed that 35.67% of them had participated. The factors related the participation in food safety program had a statistic significance (p<0.05) included the status of consumer protection the information perception in consumer protection and frequency of implementation of the health personnel in consumer protection.

The objective of this research was to study environment changes in orchards by using wireless sensor network and spatial data interpolation technique. The study was conducted by distributing several client sensors into the two study areas for recoding temperature himudity and light internsity. These data are send to a server using 433 MHz radio signal. The results from the first study area in Thachang District shew that the light intensities were significantly changed during 6:00-6:59 11:00-14:00 and 18:00-19:59. For the humidities they were significantly changed during 7:00-8:59 17:00-19:59 and 22:00-23:00 which were quite different from the changing of light intensity. Lastly the temperatures were mostly changed during 7:00-7:59 10:00-14:59 and 18:00-19:59 which were highly related to the changes of light intensity. For the second study area in Angkhiri District light intensities were significantly changed during 7:00-7:59 11:00-14:00 and 18:00-19:59 while the changing durations for the humidities were 9:00-9:59 12:00-15:00 and 17:00-19:59. Very similarly to the light intensity the temperatures were changed during 8:00-8:59 11:00-14:59 and 15:00-17:59. For the communiation distances the maximum distance for transfering data in an open area was 100 meter and 25 meters with obstables.

A solar energy is most popular renewable energy source which can reduce usage of fuel in thermal generation and impact on environment. The solar energy is a clean and sustainable source. This paper proposed method of finding optimal locating and sizing of PV solar farm on the power system with minimize fuel costs by considering solar radiation in each location of solar farm. The bees algorithm (BA) is used to minimize fuel cost of thermal units by changing location and varying sizes of solar farm with security constraints of power system and solar radiation. IEEE 30 bus test system is used to verify the proposed method. The results show that the proposed method found the optimal position of solar farm with minimum economic cost