จำนวน Repository ( 63 )
การใช้ประโยชน์กากดินขาวเหลือทิ้งจากเหมืองหินเป็นมวลรวมละเอียดสำหรับก่อสร้างอาคารประหยัดพลังงานแบบสำเร็จรูป
The research aims to study and develop the Kaolinite mixed with cement powder for the mass wall. The Kaolinite development process to improve the characteristics. The Kaolinite mixed ratios are 10% 20% 30% and 40% and the result indicated that the experiment mortar-mix ratio at 0:8:2.75:0.2:0.05:0.04:0.5 of cement powder sand Kaolinite limestone superplasticised and clean water compared to No MK control sample covered ASTM standard in tensile strength more than 100 ksc compressive strength of MK20% with superplasticised at 434 ksc. The water absorption values under the standard passed
การศึกษาส่วนผสมที่เหมาะสมของโครงสร้างกันแรงกระแทกของรถยนต์จากกากผักตบชวาและแกลบสำหรับการชนคนเดินเท้า
Recently the Thai industry has continually grown up and also plays a role to economic growth in the country which affects the many of automotive components to be in the market. While the degeneration and waste of automotive components had increased as well. Therefore a crash box is one of the automotive parts which damage from the accident. Consequently the researchers have created a prototype material to develop into the crash box to reduce the environment problem from automotive parts. The random mixture of water hyacinth and husk was attempted to up to 5 ingredients. By forming a solid cylinder and 200 mm of long was used as prototype of the crash box in this research. Thus the energy absorption using compressing test was attempted to by the universal testing machine. The results showed that using polymers as a binder with 50% of water hyacinth and 50% of husk was the better ability of energy absorption. Regarding this ingredient 1612444 J/m3 of the energy absorption was referred to indicate that is the best ability of energy absorption. It is probably reduce the severity of the impact in the event of pedestrian collision.
เครื่องจำลองการชนคนเดินเท้า
Recently the consumption rate of vehicle is continuously an increase as an economic growth. This not only causes the massive traffic but also effects on the accidental capacity especially the road accident between car and pedestrian. The most of victims who dead are Vulnerable Road Users are crashed by the front-end structure. Regarding this problem; the possibility of the Pedestrian Crash Simulator has studied and established following the Euro New Car Assessment Programs in Pedestrian Protection. This simulator can be adjusted in 3 axles of tested position. Besides the body forms are used as impactors which are pushed the high speed drive unit via the iron less linear motor. In addition the simulator can be adjusted from 0 to 65 of degree comparing the horizontal line. As a result the limitation of the Pedestrian Crashed Simulator is linear speeds because of budget limitation. The highest of performance is not more than 3000 mm/s with 19.46 mm/s2 of speeds and acceleration respectively. However this simulator can be developed the ability by addition of the power unit and control equipment. The highest acceleration should be 35.06 m/s2 within 1.76 m. of magnetic track rail to equivalent the specified condition of the EURO NCAP (in Pedestrian protection). Pedestrian protection testing machine
การศึกษาความเป็นไปได้ในการผลิตฝากระโปรงรถยนต์จากแกลบและผักตบชวาเพื่อรองรับการชนคนเดินเท้า
Recently the Thai industry has continually grown up and also plays a role to economic growth in the country which affects the many of automotive components to be in the market. While the degeneration and waste of automotive components had increased as well. Therefore a car hood is one of the automotive parts which damage from the accident. Consequently the researchers have created a prototype material to develop into the car hood which made from the husk and water hyacinth. The random mixture of water hyacinth and husk was attempted to more than 3 ingredients. By forming a flat plate with thickness between 1 to 3 millimeters was used as prototype of the car hood material in this research. Thus the mechanical properties such as compressing and bending test were attempted to by the universal testing machine. The results showed that using resin as a binder material (Reinforced resin by water hyacinth and husk) will have the less ability of energy absorption. While using polymers as a binder (Polymer resin by water hyacinth and husk) will have the better ability of energy absorption. The properly mixture between water hyacinth and husk referred to the energy absorbing properties is 50:50 because the least linear stiffness is 1.087 N/mm. Besides the ability of energy absorption is 1612444 J/m3 which is property of this ingredient can reduce the severity of the impact in the event of pedestrians collision in the best.
ความสัมพันธ์ของการกระจายตัวของสารป้องกันกำจัดศัตรูพืชตกค้างในดินเพาะปลูกข้าวและระดับการปนเปื้อนในเมล็ดข้าว
The effect of pesticides on farmers and the distribution of residual pesticides in rice plants and rice grain was studied in rice farming area covered in Samchuk district Suphanburi province. The situation and health effects related to pesticides was conducted using an individual interview and filled-form questionnaire with 126 samples. The participants were male of 68.3% and female of 31.7%. Educational level of participants was to be 36.5% and 24.6% for primary and elementary levels respectively. One-third of farmers (33.3%) reported a monthly income in the range of 5000 to 10000 Baht. A quarter of farmers (25.4%) got higher a monthly income with 10001 to 15000 Baht. Family members was found to be 4 persons (54%) 5 persons (19.8%) and over 5 persons (11.1%). All participants concerned the behavior and perception related pesticides for their highly toxicities and extremely dangerously death. A half of herbicide (50%) was glyphosate. Seriously paraquat (commercial name of Gramoxone) was found to be 22%. On the other hand the most of insecticide (55%) was an abamectin and carbofuran (commercial name of Furadan) was found to be 15%. A 20 samples of rice plants and rice grain was collected by random sampling. The residual carbofuran and glyphosate in rice plants and rice grain was determined using standard method. It was found that carbofuran was found in the range of ND-0.05 μg/kg and ND-0.08 μg/kg for rice plants and rice grain respectively. Glyphosate was found in the range of ND-0.26 μg/ kg and ND– 0 . 2 2 μg/ kg for rice plants and rice grain respectively. The residual levels of carbofuran and glyphosate in rice plants and rice grain depended on a spray period time their decomposition and the concentration of carbofuran and glyphosate. The residual levels of carbofuran and glyphosate did not significantly quantitative correlation between rice plants and rice grain.