จำนวน Repository ( 291 )

Automatic watering system using solar PV tracking
Automatic watering system using solar PV tracking

This paper presents the design of automatic watering system using sun tracking as an energy source .The objective is to design the automatic watering system for fruits grown in both areas without electricity. The solar panel can be moved along the direction of the sun cover an altitude - azimuth dual axis as an energy source of the system. The 20 longan trees are used in the experiment. The DC motors and the solar panel is controlled and rotated by the microcontroller to the position of the maximum light intensity. The watering system section will use a technique to measure the soil moisture sensors ECHO2-20 with real time PC based monitor system by Visual Basic Studio. As for the experiment results it was found that the energy stored by the developed solar tracker increased to 17.72 percent in comparison to a solar panel fixed installation. The watering appropriate soil moisture content is 12 percent and stops at 25 percent resulting for the garden moderators to save time and labor.

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การผลิตอาหารขบเคี้ยวจากฟักทองผสมแป้งข้าวกล้องเริ่มงอก
การผลิตอาหารขบเคี้ยวจากฟักทองผสมแป้งข้าวกล้องเริ่มงอก

This research aimed to study the basic recipe of Pumpkin Snack. The Randomized Completely Block Design (RCBD) was used to evaluate the sensory property appearance color flavor taste texture and overall liking. 40-testers and 7-Point Hedonic Scale were used. The study found that the first basic recipe had the highest scores in overall satisfaction. The 3 ratios of Cassava Starch and Pre-Germinated Brown Rice flour were 40:60 50:50 and 60:40. It was found that the 60:40 had the highest average scores. 3 Levels of Frying time at 180 degrees Celsius were 5 10 and 15 seconds. It was found that frying 10 seconds had the highest average scores. Quality color texture (Crispness) and chemical composition were found that 9.11 N Brightness (L*) 36.70 Red (a*) 8.71 Yellow (b*) 33.71 aw 0.53 Moisture 0.72% Fat 7.30% Protein 9.51% Ash 7.05% Crude fiber 1.96% and Carbohydrates 73.42%. The production cost of Pumpkin and Pre-Germinated Brown Rice Snack is 100 Bahts per kilograms or 4 Bahts per serving.

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The factors of satisfaction in working of supporting for government officers and others staffs in the university.
The factors of satisfaction in working of supporting for government officers and others staffs in the university.

This research is an exploring research to be connected with the main purpose of learning about the satisfactions in working as other sides for supporting personal consists of supporting for government officers supporting for government staffs university staffs permanent employees and temporary employees in total 635 people. There are only 360 people of samples from the total as mentioned to be analyzed the factors and other satisfactions the result of this research is the level of surrounding factors in working as showing the average rate for all over as the normal level. In comparing with the personal factor and satisfaction were found that Male are much more than Female about satisfaction in all factors mentioned. And also single government staff there is most of satisfying than married and divorced status. Additionally the level of satisfaction will be reduced respectively as referring with ages type of working opportunity colleague and facilities but the satisfaction of reward will be much more which is depended on ages. Moreover the experienced staff will be much satisfied as follows: Type of working Reward Opportunity and Facilities but another side to be less satisfied are Colleague. However the responsibility of members in their family will be less satisfied almost all sides. Another thing the position is the most of satisfying colleague & facilities are next and reward & opportunity to be promoted as the last one. Moreover chief executive position satisfies more than head of department and operation respectively. Noise temperature dust smell air flow and colleague are the surrounding factors to be reflected with the satisfactions.

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การศึกษาความสามารถในการออกแบบและการผลิตของโปรแกรมคอมพิวเตอร์ CAD/CAM
การศึกษาความสามารถในการออกแบบและการผลิตของโปรแกรมคอมพิวเตอร์ CAD/CAM

การวิจัยนี้มีวัตถุประสงค์เพื่อศึกษาความสามารถด้านการออกแบบและการผลิตของโปรแกรมคอมพิวเตอร์ CAD/CAM จำนวน 2 โปรแกรม คือ โปรแกรม A และ B ซึ่งเป็นโปรแกรมด้น CAD/CAM ที่นิยมใช้ในประเทศไทย แต่มีราคาโปรแกรมที่แตกต่างกัน โดยทดลองการทำงานของโปรแกรมกับการทำงานแบบลายเส้น 2 มิติ จำนวน 3 ลักษณะงาน เพื่อเปรียบเทียบความสามารถในด้านการแปลงข้อมูล (Postprocessor) เป็น NC Code เวลาในการกัดงานและความแม่นยำของชิ้นงานที่ผลิต การวิจัยนี้ทดลองภายใต้เงื่อนไขเดียวกันทุกประการ ผลการวิจัยและทดสอบข้อมูลทางสถิติปรากฏว่า การถ่ายโอนข้อมูลระหว่างโปรแกรม Auto CAD 2002 เข้าสู่โปรแกรม A และ B มีความสมบูรณ์ 100% จำนวนบรรทัด NC Code ที่ผ่านการ CAM และการแปลงข้อมูลจากโปรแกรม A และโปรแกรม ไม่มีความแตกต่างกัน เวลาในการตัดเฉือนด้วยการกัดงานปรากฏว่าโปรแกรม A และโปรแกรม B ไม่มีความแตกต่างกัน ส่วนความแม่นยำของขนาดที่ได้จากลักษณะงานทั้ง 3 พบว่าชิ้นงานที่ผ่านการตัดเฉือนด้วย NC Code จากโปรแกรม A และโปรแกรม B ไม่มีความแตกต่างกัน ที่ระดับนัยสำคัญ 0.05

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Sub-zero & Cryogenic Treatment for Mechanical Effectiveness Improved by Domestically-Produced End Mills.
Sub-zero & Cryogenic Treatment for Mechanical Effectiveness Improved by Domestically-Produced End Mills.

Product development of End Mills AISI M42 tool steels products by cryogenics treatments after process by heating system through austenite structure had been conducted in order to increase effectiveness of wear resistance geometry designed in quenching figures quality of chip flow and improved by the cutting edge with sub-zero and heating system through producing the cutting tools on the rim of rake angle at 8° and 12° and 15° austenite temperature at 1210 ° C varied in room with temperatures at 35°C lower - 70 °C and -196°C respectively. The tempering at 535°C had been three time. End Mills figures then had been operated by 5 axis CNC grinding machine for the tools. The experiment had been conducted in accordance with the AISI 1045. Such as result revealed that stress relive of tools. it hardness between 67.7 up to 68.3 HRC and reduced I HRC. Having compared with the un-stress relief it revealed that on the 15° rake angle shear force increased 8° and 12° respectively. The result had denied the Shear theory however resisted against erosion better than 12° and 8°. The result revealed that cooling at - 196°C would help increase more 15% of cut effectiveness. Cooling treatment below 0° had tended to positively resist the erosion of the out tools. With its development of control of degrees of cooling substance acid the quality of products would be better increased. Such a result could be based of the development of product lines on highly-qualities cut tools which was domestically produced.

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