This paper presents a study of comparison of PWM power rectifier between 6 Pules and 12 Pules converter topology by small hydro turbine Generator (20kW) is power supply and Compare harmonics Current feed in the systems. Both converter connected Permanent Magnet Synchronous Generator (PMSG) and Voltage Regulator Control at 700 V. The control system by Decoupling Control and Conventional PI Control for control parameter PI value by Nicole-Ziegler method. Analysis for Performance of the system presented a mathematical model with Matlab/Simulink program. The result of simulation have value less than 5 percent of ripple voltage and Voltage Control continuously. Converter 12 pulse have harmonics Current value feed in the systems less than converter 6 pulse. This Case study can apply using PWM power rectifier control in future work

This article presents the mini brown rice mill for household that is useful for farmers. After the harvest farmers keep their rice in the barn waiting for milling or paddy selling. In the rice market the cost of the paddy is very low but if the paddy is transformed to be the white rice or brown rice it could be more valuable. The mini brown rice mill is presented in this article. The rice mill was reshaped to be smaller and moveable. It consisted of four rubber crackers that turned around adversely in the different speed then the fan blew the chaff to be the brown rice and finally the brown rice will be scrubbed by the polishing machine to be the white rice. The result of this experiment revealed that the mini brown rice mill can produce more than 40 kilograms and around 10 kilograms per hour for the brown rice and the white rice respectively

This research was aimed to studying the effect of bagasse ash on the properties of footpaths concrete slabs. Using bagasse ash a waste from the manufacture of ethanol instead of the OPC type I 10 20 30 40 and 50 percent by weight. Test results revealed that the compressive strength of concrete bagasse ash mixtures was less than the plain OPC type I concrete And decreased by the content of the bagasse ash. The flexure strength of the footpaths concrete slabs was laid in the same direction. Comparison flexure strength of footpaths concrete slabs on the standard (TIS 378-2531) found that can used 40% replacement of bagasse ash replacing in cement. For the percentage of water absorption of footpaths concrete slabs in bagasse ash concrete mixtures were higher than the plain OPC type I concrete mixture and every mixture is not exceeding standard. It was also found that the replacing cement with bagasse ash content increased the cost of footpaths concrete slabs were lower down. When replacing cement with bagasse ash in 40% cheaper than the cost of plain cement were up to 31% and according to the standard

The aim of this research was to determine the effects of gender faculty and academic performance on the prevention of students to use to communicate on the Internet. Four hundred and thirty-three (male=225 and female=208) undergraduate students from 3 faculties including faculty of business administration and liberal arts science and agricultural technology and engineering in Rajamangala University of Technology Lanna Nan were used to fill in survey questionnaire. The results found that the gender had effected on the prevention oneself in the communication on the Internet. The male could prevent oneself more than female. In addition the student from engineering and science and agricultural technology could prevention oneself in the communication on the Internet more than faculty of business administration and liberal arts. However the academic performance had not affect on prevent oneself in the communication on the Internet. This study concluded that the prevention oneself in the communication on the Internet is affected by the gender and faculty but not the academic performance.

This research objectives are to develop a clear and fat separator of the Jatropha oil and to evaluate the performance. A machine consisted raw materials tank reactor clear and separated tank and control set. The reactor has diameter and the capacity of 50 cm and 90L and heated by electrical heater (3000 W). Flat blade agitator is driven by 0.25 HP of motor with 150 rpm and cooled by the water tube coil in diameter of 2.5 cm inside reactor tank. The clear and fat separated tank has a diameter and the capacity of 50 cm and 110L. From the evaluation of the machine performance raw jatropha oil (40 L) properties are viscosity and flash point of 42.66 cP and 240oC. After esterification process at temperature of 60oC at 150 rpm agitation for 60 min washed five times with water oil ratio is 1: 2 at a time for 20 min and then boiled to remove water for 60 min. The oil is reacted in tranesterification process at temperature of 60oC 150 rpm for 60 min and precipitated glycerol for 90 min and then washed and boiled to remove water. The products are glycerin (15 L) and ester oil (25 L) with the viscosity and flash point are 42.16 cP and 150oC and the color changed to clear yellow. The machine cost is 39690 THB. and payback period is 75 days