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김상철,임종환,김귀식,김성근,양종훈 제주대학교 공과대학 첨단기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.2
Potatos, together with tangerines, are one of the major agricultural products in Jeju, and the production account for more than 30% of the domestic production. Recently some kinds of sorting machine for potatos are available, but they are not extensively used because their performance is not satisfactory and/or they are very expensive. This paper presents a load based high speed weighting method for sorting the potatos. This method is based on the fact that the linear momentum of a potato is proportional to the mass of it. The usefulness of the method is demonstrated with sets of experiments.
Distance Relay Suitable for Intertie Protection of a Large Wind Farm
Lee, Sang-Cheol,Lee, Young-Gui,Kang, Hae-Gweon,Zheng, Tai-Ying,Kang, Yong-Cheol The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.3
A large modern wind farm should keep connected to the grid in the case of a grid fault whilst it should be isolated for an intertie fault. To achieve this function, this paper proposes a distance relaying algorithm suitable for intertie protection of a wind farm in the time domain. The proposed algorithm estimates impedance based on a differential equation method because the frequencies of the voltage and the current deviate from the nominal frequency. To discriminate an intertie fault from a grid fault, the algorithm uses a voltage blocking scheme because the magnitude of the voltage at the point of common coupling for an intertie fault becomes less than that for a grid fault. The performance of the algorithm is verified using the PSCAD/EMTDC simulator under various fault conditions. The results indicate that the algorithm can extend the reach of Zone 1 up to 100% of the length of an intertie and thus discriminate successfully the intertie fault from the grid fault.
조기분만과 TNF-α 및 IL-1β 유전자의 다형성과의 연관성
박철훈 ( Cheol Hoon Park ),박인양 ( In Yang Park ),고현선 ( Hyun Sun Ko ),안현영 ( Hyun Young Ahn ),김수평 ( Soo Pyung Kim ),신종철 ( Jong Chul Shin ),김연희 ( Youn Hee Kim ),이귀세라 ( Gui Se Ra Lee ),이희중 ( Hee Joong Lee ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.12
목적 : 조기분만은 신생아 사망 및 이환의 가장 중요한 원인이지만 아직 원인이나 병태생리가 잘 밝혀져 있지 않다. 조기분만의 위험인자로서 자궁내 감염이 주로 거론되고 있으며, tumor necrotic factor-α(TNF-α)와 interleukin-1β(IL-1β)가 염증의 진행과정에 중요한 역할을 하는 것으로 알려졌다. 연구 방법 : 조기 진통에 의한 조산모 66명과 조기 파수에 의한 조산모 27명을 연구대상으로 하였으며 만삭에 분만한 288명을 Objective : To elucidate whether polymorphisms of tumor necrotic factor-α (TNF-α) and interleukin-1β (IL-1β) are associated with preterm delivery caused by preterm labor and preterm premature rupture of membrane (PPROM) in korean pregnant women. Methods :
Young-Cheol Choi,Kwan-Ho Park,Sung-Hee Nam,Byoung-Gui Jang,Ji-Hyuk Kim,Dong-Wook Kim,Dong-Jo Yu 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.04
This experiment was conducted to investigate the effect of dietary supplementation of the Black Soldier Fly(BSF) larvae on growth performance, carcass rate, and fatty acid profile of chicken meat in broiler chicks. Four hundred eighty 1-d-old broilers(Ross 308) were distributed into 3 treatments with 4 pens at 30 birds per replicate. Treatments were corn-soybean meal based broiler diet (control) and the basal diet replaced with BSF at the level of 3 and 6% respectively. Viability was not different significantly. Body weight gain was higher in control than other treatments. Feed intake was not statistically different of treatments. Feed conversion ratio was lower in ontrol than other treatments. Relative weight of breast meat was significantly increased in all treated groups than in control. But, another relative weights of chicken meat cuts (thigh, wing, neck, back) were not significantly different among the groups. In conclusion, it could be suggested that dietary supplementation of Black Soldier Fly larvae could beneficially improved the performance on broiler