This paper presents about the defrosting time of evaporator in refrigerator by using the temperature different between evaporator and chilling area. This temperature different concept could control the defrosting system to operate according to the load. It also helps controlling the operation of fan motor to be able to operate in accordance with the defrosting time. In general system the timer is set at the highest humidity season which cause the unneccessary defrosting cycle even in low humidity season. This general system create the west of power usage colling system. These can cause time-consuming in defrosting process in the low humidity season and cause the unnecessary usage of power to cooling system. This research is to develop the controller for the defrosting system at evaporator from the investigation. As the results we have found that the defrosting system at evaporator according to its load made the refrigerator can decrease the power about 8% when comparing to constant time evaporator system

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.