Naresuan University Journal
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The Initial Study of Environmental and Health Impact for the Laying Hen Farm in Chiang Rai Province
Get PDF The aim of this study is to examine the environmental and health impact from a layer chicken farm in Chiang Rai Province. The methodology consisted 1) the observation of process in laying hens farm, 2) the survey from the people affecting with the health and environmental impact, 3) the analysis of environmental parameters including the total suspended particulate matter (TSP), PM 10, accumulated noise, and wastewater analysis. These results were concluded to the focus group discussion between the people affecting the health and environmental impact and the owner of layer hens farm to prevent the environmental and health problem.
From this study, it is concluded that 23.9% of the people in a community faced the odor problem from a layer chicken farm although the environmental parameters were not higher than the environmental standard. Moreover, there was a high concentration of ammonia and total nitrogen in wastewater characteristics. In addition, the results form the focus group indicated that the system of ammonia and nitrogen removal in wastewater and particle collected system should install to prevent the environmental problem. In the future, this farm should address the several technologies for reduce these problems, i.e. the air stripping for ammonia removal and water in this farm.
Keywords: Environmental Analysis, Environmental and Health Impact Assessment, Environmental Responsibilit
A Production of Virtual Reality Technology Learning Materials: Driving for Preparator of Practical Driving License Test
Get PDF This research aims to 1) produce virtual reality technology learning materials of driving test for practical driving license test-takers and 2) to study the samples’ satisfaction on virtual reality technology learning materials. The samples are 18-year-old and older eligible for a practical driving license test to get the benefits of the use of virtual reality technology at driving training as well as training in real situations at Rajamangala University of Technology Tawan-Ok : Chakrabongse Bhuvanarth Campus Bangkok. There are 30 people in the trial, 15 are drivers and possess a driving license, and the remaining 15 are potential test-takers for a driving license test. There are four steps in the process: 1) study the principles and criteria of a practical driving test, 2) design and develop virtual reality technology media using developed and proposed 3D driving simulation software, 3) study the results of the trials; and 4) analyze and evaluate the samples’ behaviors. The overall samples’ satisfaction on virtual reality technology learning materials was deemed ‘very satisfied’ with a mean of 4.21, and a standard deviation of 0.71. Also, it was found that age differences affected the satisfaction level of virtual reality technology, 20-30 years old were more satisfied than 31- 50 years old adults. Virtual Reality Sickness was common to everyone according to age; yet in older samples, they were quicker to become lightheaded after a prolonged use of the technology. It is hoped that if these samples could drive in real-world situations, they could also drive in a virtual world, except for those who had problems with Virtual Reality Sickness. For aspiring license test-takers, it is but a rule of thumb that they study and practice driving safely before they do in a real situation. Therefore, this developed Virtual Reality technology learning material is hoped to assist aspirants in their endeavors; 15-minute maximum use is also recommended to minimize VR sickness.
Keywords: learning materials, virtual reality, virtual reality sickness, driving license, car driving simulatio
Investigation on Fabricating a Chicken Eggshells Powder Mold for Metal Casting
No full text Sand casting is one of the metal casting techniques that is widely used in many applications. Besides a problem on surface quality of the casting from sand mold, sand extraction from places also gives serious environmental impact. Instead of using sand, a less environmental impact material has been considered. In this study, chicken eggshells waste is investigated for applying in metal casting process. The chicken eggshells waste is cleaned, air-dried and crushed into powder form. Bentonite and water are used to help cavity formation. A design of experiment was conducted to determine a suitable composition that provided the durable mold. Results illustrated that the specimens prepared from eggshells powder mixed with bentonite 10 wt% and water 16 wt% of eggshells powder, provided the highest ultimate compressive strength of 27.05±1.17MPa. In addition, the surface roughness of the castings was 5.86um, lying lower than the normal range of the sand casting process. With these investigated properties, the results presented the potential of using the chicken eggshells waste in this application.
Keywords: Chicken, Waste, Eggshells, Metal Casting, Mold 
What do they think of Agriculture and Fishery Careers? The Perception of Grade-9 Students
No full text This study determined whether the intervention of exposing Grade-9 students to agri-fishery career opportunities and technologies could change their perception on agriculture and fisheries. Eighty-eight (88) student-respondents from public and private high schools who participated in the three-day Agri-Fish Camp received first-hand experience in agriculture and fisheries through various related university projects and technologies. It also included lectures, games, activities, training and visits to agricultural centers. Along with the intervention, a comparison between the pre-test and the post-test showed a significant change in their perception. Respondents believed that agriculture and fisheries were a major aspect of the community. After the intervention, they were convinced that agri-fishery career paths would bring them out of poverty and a brighter future for their families. They also have a strong agreement on the involvement and use of high technology in agriculture and fisheries. Future recommendations include strengthening career guidance programs, developing strategic plans and school intervention programs.
Keywords: Agri-Fishery Perception, Junior High School, Agri-Fish Cam
Antioxidant Activities of Triterpenoids and Steroid from the Roots of Millettia utilis Dunn
No full text Two triterpenoids, oleanolic acid acetate (1), corosolic acid (2) and one steroid, stigmasterol (3) were isolated from dichloromethane crude extract in the roots of Millettia utilis Dunn. The structures of all isolated compounds were elucidated by spectroscopic methods and compared with previous literatures. The antioxidant activities using DPPH and ABTS assays of three isolated compounds were tested. Oleanolic acid acetate (1), corosolic acid (2) were revealed moderate and stigmasterol (3) was weak activity against DPPH and ABTS assays.
Keywords: Millettia utilis Dunn., steroids, triterpenoids, DPPH, ABT
Investigation of PEE5 Blended with n-Butanol and Ethanol on Performance and Pollutants of a Direct Injection Diesel Engine
No full text The research work aims to investigate the performance and exhaust emissions of a direct injection diesel engine at a constant speed of 3,000 rpm over the load range. The engine is experimentally fueled with regular diesel blended with 5% ethyl ester from palm oil (PEE5) combining with 5% n-butanol and ethanol (up to 20%), in comparison with regular diesel baseline and PEE5. Results of the engine performance test show that the brake thermal efficiency (BTE) from using PEE5 blended with 5% n-butanol and 5% ethanol increased by 0.22 and 0.31%, while the brake specific energy consumption (BSEC) decreased by 0.86 and 1.23% compared to those of regular diesel and PEE5, respectively. Engine performances when running on PEE5 blended with 5% n-butanol and 10% ethanol were comparable to regular diesel fueling. However, the use of PEE5 blended with n-butanol and ethanol added from 15 to 20% led to the reduction of BTE by up to 1.13% and the increase in BSEC by up to 4.68%. The critical findings from the exhaust gas measurements identified that the use of PEE5 blending with n-butanol and ethanol increasing from 5 to 20% resulted in the abatement of exhaust emissions, especially carbon dioxide, nitric oxide, carbon monoxide, and black smoke. The increasing concentration of oxygen and the decreasing molecules of carbon within the fuel composition led to the reduction of these emissions.
Keywords: engine performance, ethanol, exhaust emissions, n-butanol, PEE
