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농산물 안전을 위한 GLOBALG.A.P. 관리기준의 적용
윤덕훈 ( Deok Hoon Yoon ),남기웅 ( Ki Woong Nam ) 한국국제농업개발학회 2015 韓國國際農業開發學會誌 Vol.27 No.1
One of the most widely accepted and implemented certification system for agricultural products around the world is GLOBALG.A.P. certification system. It aims to the safety through the minimize of hazard, and to the environment-friendliness for the maintain of sustainable productivity, and to the strength of social function through the improvement of worker’s welfare. GLOBALG.A.P. certification system has been increased interest in Korea, and participating farmers are also on the rise. The results of this study from 127 farmers in the three organizations are as follows. The producer’s group is need to be managed in a systematic and organized in manner with internal regulations and/or guidelines. In the farms, the level of safety and hygiene for workers was significantly lower by 20.4% than other areas. Also, the level of management for the plant protection products was 22.7% in average, and 63.6% for the management of fertilizers. Therefore, it is concluded that advanced education and management for the farmers and substantial support for building the farm environment should be realized in order to meets the needs of consumers and to strengthen international competitiveness.
Yong-Hoon Yoon,Yong-Ha Song,Seung-Deok Ko,Chang-Hoon Han,Geon-Sik Yun,Min-Ho Seo,Jun-Bo Yoon IEEE 2016 Journal of microelectromechanical systems Vol.25 No.1
<P>This paper reports a highly reliable electrostatic microelectromechanical systems (MEMS) relay for high-power switching applications. The main proposal to elevate reliability is to reduce thermal damage in the contact area. Since a contact resistance is the key parameter determining the amount of Joule-heating and the corresponding thermal damage, we devised a unique spring structure to maximize the contact force (resulting in a low contact resistance) using a reasonable actuation voltage named a two-step spring system. Another important feature was applied to alleviate Joule-heating, which is to use an insulator having high thermal conductivity to dissipate the generated heat efficiently, named a heat sink insulator. The fabricated MEMS relay exhibited 2 m Omega in contact resistance, which is the lowest level reported so far with an actuation voltage of 45 V. Reliability was remarkably enhanced over ten times by the heat sink insulator. Consequently, by applying these two approaches simultaneously, the fabricated MEMS relay was successfully operated up to the 5.3 x 10(6) cycles at 1 V/200 mA in ambient air and hot switching condition, which is the highest reliability reported at that power level. [2015-0237]</P>