Defrosting at evaporator panel is one of working cycles in freezer. Power consumption in defrosting does not meet the objective of using freezer therefore the approach to decrease power consumption in defrosting is one strategy for energy saving. Normally the cycle of defrosting in freezer is a constant time that specify by referring to the highest humidity period. With this control concept the problem of temperature exchange is not occurred from ice accumulation at evaporator panel but it makes the over necessity of defrosting process in the low humidity season and cause the unnecessary power usage in freezer. This thesis presents the control approach for defrosting by using the difference of the temperature at evaporator and the temperature at chilling area. By using this approach the defrosting process is operated depend on load and the fan is on or off relate to defrosting time. Test results demonstrate that about 12% of power can be saved by this control approach when compared to constant time control.

The purpose of research is to study the carbon footprint evaluation of products for thread turned Tungsten Carbide 16ER60 of production. To assess amount of greenhouse gas emissions that affect the environment. The key component in the calculation include raw material production material energy and waste January 2018 and March 2019. The scope of the study is the assessment of Business-to-Business (B2B). From the assessment of the carbon footprint it was total of greenhouse gas was about 1.1559 Kg CO2e which was divided from raw material about 0.0118 Kg CO2e and production process about 1.1441 Kg CO2e. From the improvement reducing electricity of sintering furnaces machine and lighting system was reduce greenhouse gas emissions about 0.3249 Kg CO2e or decrease percent 71.88 CT

The purpose of the study was set to analyze the current situation of human resource cost management of tourism business of community enterprises in the lower central region. The study was examined through the perspective of a group of experts scrutinizing future feasibility of human resource cost management of tourism businesses of the lower central region community enterprises. The data were examined by delphi techniques with the data collected through the interviews and questionnaires from three different data collections. The data analysis was completed using means of descriptive median and consistency then confirmed the result with by the interquartile range calculation. It was found that the key components included 1. Mechanism skill cost 2. Management skills cost and 3. Effectiveness skills cost for the determination and validation of future forms of human resource cost management model in tourism business of community enterprises in the lower central region as examined and approved by the experts in all three skills for the feasibility of the future application

The purpose of this Participatory Action Research (PAR) was to study the guidelines for creating recreational activities to promote health for the elderly and to create a practical guide for organization of recreational activities for senior citizens in Thamakham Subdistrict Municipality Mueang Kanchanaburi Kanchanaburi. This research project had a sample group of 40 volunteer participants who were aged 60 or over were able to take care of themselves and were inhabitants of Moo 1 Moo 2 and Moo 5 in Thamakham Subdistrict Municipality Mueang Kanchanaburi Kanchanaburi. The data-collecting instruments for this research were 12 recreational activity programs for promoting health for the elderly and structured interviews of the participants. Data analysis was performed by calculating percentages means and standard deviations. The results of the research project: 1. Most of the seniors were female married have no career have one to three family members and have medical problems. Most of them participated in community activities. 2. Most of the seniors have a medium level of basic knowledge in promoting health for the elderly people. 3. The level of point of view of the seniors about the purpose of creating recreational activities to promote health for the elderly was much more than average. 4. The level of satisfaction of the seniors about managing recreational activities to promote health for the elderly was much more than average. 5. The level of overall satisfaction of the seniors about recreational activities to promote health for the elderly was much more than average. 6. Suggestions were received from the senior citizens that the schedule for the activities should be Monday to Friday between 8.00 A.M. to 12.00 A.M. and that the venues for the activities should be dependent on the organizers and that there should be field trips. 7. Creation of a practical guide containing 12 activities to organize recreational activities for seniors in Thamakham Subdistrict Municipality Mueang Kanchanaburi Kanchanaburi.

This research aimed to study the personal factors operation and effectiveness of the lunch management project in Central Special Education Center Bangkok. The comparison of the effectiveness of the lunch was based on respondents’ individual factors this study proposed guidelines for optimizing the lunch arrangements. The research group consisted of 215 parents administrators and persons in charge of lunch management of which 164 samples were divided into 140 parents and 24 administrators and responsible persons for the lunch. The research instrument was a survey questionnaire. Data were analyzed statistically by using frequency percentage mean standard deviation and one-way analysis of variance. The results of the study indicated that this sample of parents was predominantly female aged between 31 to 40 years holding a lower bachelors’ degree and having a maximum income of 10000 baht. Overall the operations of the lunch project were performed at a high level. It appeared that the raw materials had the most average followed by administration management. The personnel aspect was the least. Moreover parents’ perception towards the effectiveness of the lunch project were high. Considering each aspect ordered from the highest to the least they respectively included quantity type quality of lunch safety and health administration and favorite luncheon menus. The comparison of the effectiveness of lunch project management and the perception of parents classified by their personal factors revealed that there was a significant difference at 0.05. The found guidelines for increasing the effectiveness of the lunch projects were to provide quality food ingredients the variety of tasty and nutritious dishes and five food groups. Moreover recruited dietitians were required to cook clean disease-free and healthy food by either frying steaming boiling or grilling the food. As a result of fully utilizing nutrients students would stay fit and healthy.