The purpose of this research was to investigate the optimum heat temperature for the EC500 wax cured basecoat extrusion from all castings without waxing in the mortar. To reduce waste when the casting mortar through the casting process Silver Sterling 925 silver jewelry company Muang District Chiang Mai where the waste is caused by waxing outflow. The imperfections and leave waxing inside. Experiment with high temperature heat in mortar. And analyze the quality of work surface after casting with microscope. To find defects such as droplets and porosities caused by a range of temperatures. Temperature of baking mortar There is a difference from the conventional waxing mortar temperature. That is outflow of EC500 type wax. In the mortar to live. High heat The results of the 100 sample EC500 wax samples were tested at a temperature of 25 ° C. The mortar temperature was 700 ° C. 60 percent of waste was found the mortar was laid at 750 ° C 54 percent of waste was found. The mortar temperature was 800 ° C 32 percent waste was found the mortar temperature was 850° C Detecting 1 percent waste. The results of the study show that heat temperatures of up to 850 ° C can solve the problem of casting sterling silver alloys from the EC500 wax model. Finds the least waste.

Thailand is an agricultural country. Most of the population consists of farmer. The rice is suitable to the climate of the country. And the main export of Thai is rice. The preparation of grain is also important.The farmer have to has an experience to choose the grain for growing the rice in farm. Good grian will give the high product. And good grain should completely free from contamination of disease and insect. Then it will be healthy seedlings. It is easy to harvest crops in a very high quality. Even it has good and high quality but it still has in impurities in the seed. Then the idea to create a project of sorting impurities from seeds. From the first it was built to help farmers to separate impurities such as grasses and husks. But the problem is the size of the maching is 140 x 150 x 160 cm which is larg and heavy then it makes the inconvenient to move. The preparation of the project is to develop an interest in sorting impurities in grain. The objective is to reduce the size to a smaller size than before. And increase the work more efficiency. The main aim is to sorting impurities in grain. Preparing the rice and put into the machin when power is opened. Rice will be flowing through the sieve which it works as a distribution and contamination. Then it will fail down into the sorting room. Impurities will be removed and the wind from the fan will blow the seeds. So we will get the good product and high quality. The results of the test. Wind is the best performance of the machine. Separating rice grains is 5.4 meters per second. The test of separating of the rice grains in 5 times and in the test of the 10 20 30 40 and 50 kg with a mixture of 10 percent of husk. the most effective of sorting rice is 10 kg. It can be isolated 99.30 percent with in 1.23 minutes.

The purposes of this study were to investigate the heat transfer and the vibration characteristics caused by front and back vented brake disc which had physically different shapes affecting braking distance. In accordance with the theory of heat transfer the heat transfer rates of two types of brake disc were different and played an important role in the deformation during usage. The single dynamometer was conducted to the experimental work as an engineering tool with boundary conditions according to JASO C406 standard. One degree of freedom (DOF) acceleration signals on the brake caliper were analyzed. The results obviously discovered that the back vented brake disc was able to reduce the vibration up to 43.5% comparing to the front vented brake disc in case of the braking temperature 200C initial breaking speed 50 km/h and the hydraulic pressure of 4 MPa. Besides the hydraulic pressure at 4 MPa generated the maximum vibration. Furthermore the initial braking speed and the braking temperature were also the important factors. Regarding braking distance results the results of the experimental work obviously discovered that the back vented brake disc created braking distance shorter than front vented brake disc. Besides there were important factors as braking temperature hydraulic pressure and initial speed of braking. Especially the high braking temperature caused an increase of deceleration and a decrease of braking distance. Moreover the high hydraulic pressure produced a deduction of braking distance and an increase of deceleration. Finally the initial speed of braking directly varied to the braking distance

The purposes of this research were : 1) the satisfaction of the training course of carved flowers and banana leaves and 2) the relationship between personal satisfaction in training courses of carved flowers and banana leaves. The samples the participants enrolled courses and spent about 80 hours in the Vocational Training Center Bangkok 10 300 engines used in the questionnaire. The statistics used for data analysis were frequency percentage mean standard deviation and the Chi-Square data were analyzed using a computer program. The results showed that: 1) Satisfaction of the participants in the training courses of study and work carved banana flower overall and participants were satisfied. The high level was the first two items in order from most to least find that the side with the highest average was the instructor and They followed by the courses and subjects offered. The resources were for teaching and the average minimum was the educating and the environment. and 2) The relationship between the individual factors of the respondents were satisfied with the training course of carved flowers and banana leaves. The results showed that age education occupation income up to a month. The correlation between the gender status source of admission and choose a date range no relationship. The statistical significance level. 05.

The purposes of this research were: 1) to study personal factors knowledge of selfemployed in Home Economics and reasons for decision making of self-employed in Home Economics 2 ) to study the relationship between personal factors and decision making of self-employed in Home Economics and 3) to study the relationship between knowledge of self-employed in Home Economics and decision making of self-employed in Home Economics. The sample group was 196 of the 4th year undergraduate students Faculty of Home Economics Technology Rajamangala University of Technology Phra Nakhon who decided to work as self-employed person. The instrument used in the study was a questionnaire. The percentage mean standard deviation and Chi-Square values were used for statistical analysis. The results showed that: 1) most of the sample was female (72.45%) and more than a half of the sample studying in Department of Foods and Nutrition (52.55%) their cumulative GPA were between 3.01-3.50 (40.31%) followed by 2.51-3.00 (31.63%). For family information (64.80%) of their parents were entrepreneurs or self–employed the average monthly income of more than 35001 baht per family (34.18%) followed by 15001-25000 baht (30.61%) for the knowledge of self-employed in Home Economics in the overall was at a high level ( = 3.78 S.D.=0.69). Types of self-employed in Home Economics selected the most was production (50.00%) followed by distribution (26.53%) and services (23.47%). The reasons for choosing self-employed in Home Economics were freedom of work (37.25%) having to use knowledge aptitude and proficiency in work (23.47%) and having a good opportunity to being successful in work (12.25%) the expectation to have an average monthly income was between 25001-35000 baht (56.63%). 2) the relationship between personal factors and the decision making of selfemployed in Home Economics including gender field of study cumulative (GPA) parents’ occupation the average monthly of family income and work experience during study found that there was statistical significance at the level of .05 except the family self-employed. and 3) the relationship between knowledge of self-employed in Home Economics and the decision making of self-employed in Home Economics found that there was statistical significance at the level of .05