The purposes of the research were; 1) to study the relative rotation of AC-generator 2) to study the angular velocities of magnetic coil and permanent magnetic influence generating voltage of AC-generator and 3) to construct predictive equations of generating voltage of AC-generator. By the 12-V 6-pole alternator of motorcycle Pearson’s correlation and regression analysis the findings revealed that: 1) At the lowest relative angular velocity of 376 rpm the generating voltage is 3.28 V. While the highest relative angular velocity of 2280 rpm the generating voltage is 22.98 V. 2) The angular velocity of permanent magnetic has great influences on generating voltage than the angular velocities of magnetic coil at the .01 level of significant and 3) function as below : Generating voltage = 0.806 (Velocity of permanent magnetic) + 0.634 (Velocity of magnetic coil)

The fault in a power distribution system disturbs the power dispatch under normal conditions therefore decreases the quality of the electric power. The single line to ground fault is an asymmetric fault that may have a high percentage chance to happen. The kind of fault changes power and voltage dramatically. The size of the phase voltage decreases which affect the economic damage of the system. This paper presents an analysis of grounding systems to reduce voltage drop in a power distribution system by using the technical analysis system in case of one phase to ground fault. The objective is to minimize voltage drop for users using the simulation with single line to ground fault in distribution system voltage level at 22 kV PEA’s test system. The simulation utilizes the EMTDC-PSCAD program. The results show that the grounding method can reduce the voltage drop and reduce the damage of the economic system

Mahajanaka mango juice was health benefits and was a source of vitamins especially vitamin A in the form of beta carotene which a potent antioxidant. The purpose of this study was to consumer acceptance and quality of ready to drink mahajanaka mango juice the optimum ratio of mango pulp and water at 1:2 and 1:2.5 to 1:3. Result showed that the optimum ratio of mango pulp to water was 1:2. The mango juice contain of malic tartaric citric succinic and ascorbic acid at 0.005 0.053 0.180 0.005 and 0.138% respectively. The selected juice had 3.49 12.20oBrix 62.25 7.71 59.24 and 5.26 micrograms per gram of pH total soluble solids L * a * b * color values and beta-carotene content respectively. Sensory evaluation result revealed that the selected mango juice was accepted by 30 panelists which was medium like in color appearance odor taste and overall acceptability. Result of consumer test had shown that 97 % of 100 consumers from Lampang province were accepted and 65 % decided to buy the product.

The purposes of this research were to make artificial wild orchids from joint-vetch to imitate the natural one. Researchers studied joint-vetch dyeing Thai wild orchids forming from joint-vetch Thai wild orchids selecting by considering appropriate appearance shape and composition and five experts gave the opinions on the chosen researched orchids. The development of wild orchid product from joint-vetch was transferred to housewife’s group in Phra Nakhon Si Ayutthaya province. The satisfaction of the research product was investigated from 60 target groups. The overall satisfaction of the participants after attending the training course was at the high level (4.73). Other aspects were found that the average mean (4.74) of the facility was at the highest level. The average mean (4.73) of the knowledge application was at the highest level. The average mean (4.71) of the product was at the highest level. The average mean (4.68) of the instructor was at the highest level. The average mean (4.35) of the understanding was at the high level.

This objective of this research was to study the personal factors and efficiency of transportation system for tourism in Koh Sichang Chonburi Province. The research samples contained the person who related in transportation for the tourism in Koh Sichang Chonburi which were tourists tourism transport entrepreneurs and government departments totaling 412 samples. The data was collected using questionnaires and convenience sampling methodology. After collecting data those were analyzed by using descriptive statistics and inferential statistics. he result of the research has shown that tourists are mostly female age between 25-40 years. The tabulation of the mean scores shows the moderate agreement. Also it is found that sample group whose gender and age are different will have no different. Person who related in transportation for the tourism are different will have different attitudes toward the Efficiency of Transportation System for Tourism in Koh Sichang Chonburi Province