This paper presents an efficient algorithm for optimization of radial distribution systems by a feeder reconfiguration to balance feeder loads and eliminate overload conditions. The system load-balancing index is used to determine the loading conditions of the system and maximum system loading capacity. The index value has to be minimum in the optimal feeder reconfiguration of load balancing. A method based on Tabu search algorithm The Tabu search algorithm is employed to search for the optimal feeder reconfiguration. Simulation results for a radial 69-bus system with reconfiguration and capacitors placement. The study results show that the distribution system with capacitor placement and optimal on/off patterns of the switches feeders reconfiguration can be load balancing in distribution systems.

This paper presents the method to reduced electromagnetic interference from electronic drive for LED lamp to achieve the TIS standard No.1955-2551. According to standard it must have been tested for magnetic field compatibility that are included Magnetic Field Emission: ME Conducted Emission: CE and Coupling Decoupling Network: CDN. The 3 LED lamp which defined as Type A B and C were tested. Each lamps has 16 watt electric power and was different electromagnetic interference of electronic drive. After that the reduce electromagnetic interference circuit has been designed for low frequency. This circuit test was based on Conducted Emission test only. The integrated design was preferable to reduces electromagnetic interference for LED lamp drive device type A to the TIS. standard No. 1955-2551. That design circuit was been trialled in LED lamp drive device type B and C in order monitor efficiency of reduce electromagnetic Interference. The results showed that design circuit can reduce electromagnetic interference from LED lamp drive device type A and B to the standard. For LED lamp drive device types C the design circuit can reduce electromagnetic interference but it still has not achieve the standard.

The objectives of this study were to calculate the probability of type I error power of a test and to compare the performance of three test statistics: Z Student’s t and Welch’s t. Including the recommending the appropriate test statistic. Classification of the population according to five distribution. The ratios of mean group 1 per group 2 were three levels. The ratios of variance group 1 per group 2 were three levels. The sample sizes of two populations were nine sizes. The significance levels that to study were 0.01 and 0.05. The data were simulated by using SAS programming with 1000 replicates. Results of the research were Z test statistic could control the probability of type I error and had higher power of a test than other test statistics but this test is necessary to know the variances of the two groups. Therefore it was appropriate to apply the other test statistics i.e. Student’s t or Welch’s t. If the variances of the two groups were equal Student’s t was a more appropriate test statistic than Welch’s t. But if the variances of the two groups were not equal Welch’s t was a more appropriate. When both sample sizes were large and the population variances were equal we could use any tests since there is no difference in the performance.

The purpose of this study is to investigate the background of the ceremony traditional patterns and procession as well as its important role to the community. Fifteen Nasao villagers were purposively sampled. The research tool is interview scripts of the informants. It was found that the Phi Khon Nam ceremony was one of the local traditions of the people in the Khong River basin which was known as the cultural group of Lanchang Kingdom origin with the belief of paying homage to their ancestors. The festival is held from the first to the third day of the sixth waning moon which lasts three days at Pho-Sri Temple Nasao Chiangkhan District Loei. The Phi Khon Nam plays an important role to the community on gathering lots of people who intend to express their gratitude and pay respect to the spirits of their ancestors who protect them control the well-beings of the villagers evoke the annual rain from the heaven and bless crops. Moreover it is believed that Phi Khon Nam is well-recognized as the heart and soul of the villagers and also the identity of the village well-beings and the unity of the community. In addition the Phi Khon Nam procession is the combination of local tradition and religious activities

The research aimed at studying the relationship between change management process and the success of organizational development into learning organization of District Fisheries Offices in Roi Et Province. The sample was 66 officials determining sample size using Krejcie and Morgan table. The research instrument was a questionnaire. Statistical tools were percentage mean standard deviation one samples t-test and Pearson Product Moment Correlation. The research main findings revealed that; the success of organizational development into learning organization was at a high level change management process was at a high level and the relationship between change management process and the success of organizational development into learning organization was positive at the medium level (r= .53) which was statistically significant at the .01 level.