The problem of this research is automotive part companies do not have order because of the world economic crisis and effect to automotive industry. Automotive and automotive parts demand in the world decrease. Automotive Industry of Thailand received affect. Automotive part companies cannot export to foreign markets. The companies in Thailand need the forecasting of automotive part quantity demanded by foreign markets by selecting the most accurate model. This paper presents the modeling for forecasting demand for automotive part of foreign markets to Thailand with time series forecasting techniques. In this study the automotive part are wheels and including parts and accessories because Thailand exported the most in group of automotive parts. These five countries have consistently demanded the largest number of wheels and including parts and accessories are Japan China South Korea Germany and Indonesia. The research involves historical collecting data for the period of 1997 to 2008. The evaluation function of forecast error is used with MAPE. The results reveal that each country suits for each model in term of the chosen dimension. The government can use the forecasting demand for effective production planning by informing manufactures.

Here we present an experimental study of the single-effect adsorption cooling system using activated carbon-methanol working pair. The test unit was comprised of an adsorber a condenser and evaporator in vertical alignment. Heating and cooling of adsorber was mainly done by hot and cold water circulating through the water jacket. The evaporator and condenser was heated or cooled by flows of water through the internal coil. The adsorber was analyzed for its cooling rate when cooling was done by two approaches either cooling water and/or three thermosyphon heat pipes which both methods gave shortest cooling time. The investigated heat source and sink temperatures are; hot water temperature supplied to adsorber (70 80 90 oC) and cooling water temperature supplied to condenser (5 10 15 oC). An ultrasonic wave generator was attached to the bottom end of the evaporator to generate wave frequency varied by 8 10 and 14 kHz during evaporation phase. The ultrasonic wave can obviously reduce the evaporation time of methanol as well as to improve the system performance in terms of COP SCP and VCP. The system performance was considerably comparable to those from literatures. The highest COP and SCP obtained from this system was 0.718 and 248.90 W/kg respectively.

The purposes of this research were to build and develop a standardized test used to measure English abilities compliant with the curriculum of the fourth-year students of Rajamangala University of Technology Phra Nakhon. There were two groups of the students namely the first group which consisted of 57 students who took the traditional pilot paper test and the latter which consisted of 63 students taking the electronic test via the Internet. The other purposes were to find out the students/users’ attitudes and satisfaction towards the use of the electronic test and to obtain a computer program prototype for measuring English abilities. The results were as follows: 1. The item analysis of the pilot paper test revealed that there were 64 items of appropriate difficulty index and discrimination power whereas that of the electronic test revealed that only 56 items had appropriate difficulty index and discrimination power. Even though the latter test had been improved the accepted items were fewer. This led to the assumption that the characteristics of doing an electronic test affected students’ decisions and made them guess more than when they took a paper test. 2. The questionnaires analysis of students’ satisfaction of using the electronic test program to measure their English abilities revealed that the overall arithmetic mean was 75.72. The highest scored item of 87.59 percent was “I think this e-test program is useful”; and the lowest scored item of 66.21 percent was “I think the screen format is interesting”. Moreover there were 11 users who showed their positive opinions towards the e-test program which was 18.97 percent of the latter group.

The purpose of this study was to study individual factors of students that effect the production of graduates of Rajamangala University of Technology Phra Nakhon. The survey method by questionnaire was used to collect data from students in their 4th year who were in the 4-year program and 2-year continual program of the university 350 in total. The collected data was analyzed with a statistical software program to calculate the percentage means standard deviations t-test and One-way ANOVA. The level of statistical significance was set at .05. The result reveals that individual factors of students that effect the production of graduates of Rajamangala University of Technology Phra Nakhon were age faculty academic record previous education resident characteristic the relationship of student behaviour learning condition and satisfaction towards graduates production. Meanwhile factors of gender and study program didn’t affect individual factors of students that effect the production of graduates of Rajamangala University of Technology Phra Nakhon

The research involved the characterization of the properties of silver alloys -bearing copper and zinc. The alloys composed of 58.4% silver 20.85-41.76% copper and 0-20.83% zinc respectively. When comparing the characteristics of this alloy and sterling silver 925 the alloy specimen had mechanical properties better than the sterling silver 925. The alloy tests presenting the mechanical values of the hardness shear bond strength elasticity of the specimen were in a range of 54.6-95.3 HV1 209.5-379.3 MPa. 100.6-193.8 MPa. and 32.1-51.7% respectively. While the mechanical values of sterling silver 925 were 52.8 HV1 193.5MPa. 96.0 MPa. and 29.8% respectively. Besides these the microstructure of the alloy specimen showed the dendrite structure. We found that this structure decreased when the concentration copper in the specimen increased. After adding zinc into the alloys the high amount of zinc caused the zinc-rich (alpha) phase changed to Eutectic phase together with the significantly increased area of alpha phase. These effects therefore brought up the better various mechanical properties of the alloys. At the same time the another test specimen composed 58.67% Ag 39.20% Cu and 2.14% zinc. The color level of this specimen was close typically to the sterling silver 925 with the difference of Da at 0.236 and Db only at 5.268. Additionally the higher copper concentration in the alloy provided a value tentatively increased but b value decreased. However more remarkable results were that the zinc showed opposite effects from the copper.