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 research 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 purposes this research were: 1) to develop the activity packages on home textile pillow products forming process for textile product design students division the efficiency of 80/80 2) to compare academic achievement of textile product design students academic calendar 2018 before and after the experiment using the activity packages on home textile pillow products forming process 3) to study satisfaction of students toward the activity packages on home textile pillow products forming process. The sample consisted of 20 students who studied textile product design in the academic year 2018 at Rajamangala University of Technology Phra Nakhon. They were selected by purposive sampling. The research instruments were the activity packages on home textile pillow products forming process the achievement test and a satisfaction questionnaire. The data were analyzed by percentage mean standard deviation and t-test for dependent samples.The results of the study were as follows: 1) the efficiency of the activity packages on home textile pillow products forming process for textile product design students was obtained 84.65/82.50 higher than a predetermined threshold 80/80 2) academic achievement of home textile pillow products forming process for textile product design students was significantly higher than before the experiment using the activity packages on home textile pillow products forming process at the 0.5 level 3) the satisfaction of Textile Product Design students using the activity packages on home textile pillow products forming process was at the high level.

Based on the research on creation of bas-relief molds for production of bas-reliefs made from boiled pineapple leafs conducted by Rachadasak Pengcum of which purpose was to help generate income for members of Pineapple Leaf Paper Community Enterprise Ban Pasang Wiwat Mueang District Chiang Rai Province it was found that the bas-reliefs need further improvements in terms of appearance and durability as well as the use of other natural raw materials to produce them. The researcher therefore has considered developing the previous research by applying other 3 valueless natural materials which include rice straw water hyacinth and banana stem skin to make bas-reliefs for different beautiful surfaces of the products. Also the quality of bas-reliefs has been comparatively investigated by surveying satisfactions of members of the Community Enterprise and visitors to the project towards the bas-reliefs made from rice straw water hyacinth and banana stem skin. The total period of questionnaire distribution was 3 months. There are 59 respondents administering the questionnaires most of whom (43 persons) are female which accounts for 72.88 per cent. The majority of the respondents (25 persons) obtained junior/senior secondary school diplomas or equivalent accounting for 42.37 per cent. 16 respondents or 27.12 percent are 60 years of age. As for satisfactions towards the bas-reliefs made from rice straw 89 times of “strongly agree” was selected whereas 126 times of “pretty much agree” 75 times of “fairly agree” and 5 times of “disagree” were marked by the respondents. Concerning the bas-reliefs made from water hyacinth 87 times of “strongly agree” was selected while 97 times of “pretty much agree” 110 times of “fairly agree” and 1 time of “disagree” were chosen. When asked about the bas-reliefs made from banana stem skin the respondents selected 77 times of “strongly agree” 99 times of “pretty much agree” 110 times of “fairly agree” and 8 times of “disagree”.

Ground grid design of substation is very important. It will help prevent the danger caused by the fault which causes the high step voltage and high touch voltage and may cause the operator to die. It also helps prevent damage to equipment and increases reliability for power systems as well. Currently the Gas Insulated Substation (GIS) has been built a lot especially in areas with limited space because it takes less space than the Air Insulated Substation (AIS). In order to create a substation of the GIS model instead of the AIS model. In order to create the GIS instead of AIS including the improvement or maintenance of the substation it is necessary to build another small substation to supply electricity to replace electricity from the original substation. However there are two substation stations in the same area may cause an increase of high-slope ground potential between the ground grid systems of both substations. It will cause high step voltage and high touch voltage while the fault is diminished. Therefore before improvement or maintenance of substation the ground grid distance and the size of the newly constructed substation must be analyzed that what effect on step voltage and touch voltage generation. Including studying the effects of step voltage and touch voltage that will occur.

This project presents the design and development of application software of retail management system for drinking yoghurt. The developed application runs with Client/Server processing on Windows XP or higher. The objective is to be convenient for checking products automatic adding/removing products in warehouse counting stocked products and editing data. Tools used in development are Microsoft SQL Server for database management Visual Basic Version 6.0 for application development and database programming and Crystal Report 8 for creating reports and invoices. The developed application can enhance the effectiveness in retailing for drinking yoghurt properly.