This research studied about mixing material to make the cement block with corncob to get a lighter weight but still have industry standard strength for non-bearing concrete block (TIS. 58-2530). Normally general cement block use 1:2 ratio by weight of cement and flour rock respectively The corncob were ground through a standard 3/8 inches sieve and were used to replace the flour rock using a ratio of 0% 3% 5% 7% and 9% by weight and setting the ratio of water per cement as 36% 40% 44% and 48% by weight. The compressive strength of 7x19x39 centimeters cement block mixed with corncob was tested at the age of 28 days. The test results to make cement block mixed with corncob showed the suitable ratio 3% corncob using instead of flour rock. The average compressive strength of the blocks was 20.09 kg/cm2 and the percent of water absorption was 12.23 % which past the Thai Industry Standard (TIS 58-2530)

This research aimed to analyze the conditions processes and impacts of social immunity learning in school towards learners and people in community. Documents literature incorporated with experiences of villagers school personnel and learners derived from in-depth interviews and focus group discussion were used as texts for qualitative methodology based on social constructivism. Social immunity in school was constructed under conditions; contexts and special desires of school accordingly the government policy for school practicing reduced processes of social immunity learning to general rules. And school could only be a follower without revision and question. This kind did not take heed of learners to understand thoroughly and to handle their complicated problems according to government will. School and stakeholders were understood and integrated society situations which were the conditions of social immunity learning. Both of school physical history and reputation and modern society context had to push forward to happened learning processes related to question with government policy revision with school and community context and construction social immunity. Therefore school as a core to construct social immunity for awareness and coping with real situations of learners and people in community was able to occur. The impact of this learning replaced the learners and villagers whom were the followers of passed general rules and policy to the participants of cooperative learning and constructing social immunity processes. Hence learners and villagers determined meaning of social immunity for awareness and having abilities to exist in society with understanding thoroughly.

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 research aims to study the application of kaolin with coconut fiber corncobs fiber and durian peel in concrete masonry unit wall for increasing effective heat protection and lightweight. The ratio of cement type 1: kaolin is equal to 1: 60 by weight. The kaolin is replaced by fiber include coconut fiber corncob fiber durian peel fiber with 1.67% 3.33% and 5% by weight of kaolin. The kaolin concrete block mixed with fiber sample size is formed to 6.9 x 39 x 19 centimeter with the hydraulic compactor. The samples tested in physical and mechanical properties follow the TIS 58-2533 standard. Resulting their fibers can reduce the density thermal conductivity and compressive strength and increase the changing length and water absorption of kaolin concrete blocks. The kaolin concrete block without fiber has highest compressive strength followed by the kaolin concrete block mixed with corn cob fiber the kaolin concrete block mixed with coconut meal fiber and the kaolin concrete block mixed with durian peel fiber has lowest compressive strength respectively. However their fibers have possibility to be composite materials to reduce weight of kaolin concrete blocks

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