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김선구(S.G Kim),배석명(S.M Bae),방선배(S.B Bang),정종욱(J.W Jung),이관제(K.J Lee) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
우리나라는 에너지자원의 해외의존도가 높고 에너지다소비 산업구조를 가지고 있으며 또한 국제유가 등락에 따라 경제가 큰 영향을 받으므로 이에 대한 대처방안으로 합리적인 에너지 이용효율개선과 범국민적 에너지절약의 중요성 갈수록 높아만 가고 있는 실정이다. 에너지절약을 위하여 고효율 변압기를 채택하는 방법도 전력용변압기의 효율적 이용방안중의 하나이므로, 본 연구는 국내 전력용변압기의 평균연간 부하율을 도출하여 합리적이고 타당성 있는 고효율변압기 기술기준안 작성을 위한 자료제공을 목적으로 수행되었으며, 연구결과 도출된 내용은 국내 전력용변압기의 최저효율제 국내기준 마련 등 변압기 관련기준안을 검토 보완하는데 활용할 수 있을 것으로 기대된다.
정숙근,김선구,김용곤 ( S . K . Cheong,S . K . Kim,Y . K . Kim ) 한국축산학회 1985 한국축산학회지 Vol.27 No.6
Swine carcass characteristics: Dressinge, lean meat and backfat thickness: and marketing statement of swine: Distribution of carcass weight, backfat thickness and price per ㎏ of carcass were studied to establish the swine carcass grading criteria in Korea. Five swine carcass grading criteria (see Tab: 2) was established by using of the principle which dressing percentage and backfat thickness was increased by increasing of carcass weight, but lean meat ratio was decreased. When this criteria was used at wholesale markets, five grades - A,B,C,D and E - were appeared by 2.8, 24.0, 37.7, 27.0 and 8.5 percent, respectively. If the carcass graded by the carcass criteria of weight and backfat thickness can be examined by seeming judging, carcass quality will be classfied more exactly.
한국형 EMS NA Prototype 어플리케이션 개발
윤상윤(S.-Y. Yun),이욱화(U.-W. Lee),조윤성(Y.-S. Cho),신철호(C.-H. Shin),이진(J. Lee),신만철(M.-C. Shin),김명의(M.-E. Kim),양희성(H.-S. Yang),이병하(B.-H. Lee),허성일(S.-I. Hur),김선구(S.-K. Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
본 논문에서는 한국형 에너지관리 시스템(energy management system, EMS)의 프로토타입(prototype) 네트웍 해석 프로그램의 개발에 대해 요약하였다. 2005년부터 수행되어온 한국형 EMS 개발은 2008년 베이스라인(baseline) 개발을 완료한 상태이며 올해부터 프로토타입 개발 및 실증시험을 수행중에 있다. 한국형 EMS 프로토타입 네트웍 해석 소프트웨어는 베이스라인 개발 프로그램의 기능 보강과 더불어 상정사고 해석(contingency analysis), 전압 계획(voltage scheduler) 및 송전가능용량계산(transmission transfer capability)등으로 구성되어 있다. 본 논문에서는 각 개발 프로그램의 개략적 기능을 소개하고 전체적인 프로토타입 시스템의 구성에 대해 요약하였다.
강한석 ( H. S. Kang ),손장호 ( J. H. Son ),이길왕 ( K. W. Lee ),김선구 ( S. K. Kim ),조병욱 ( B. W. Cho ),신택순 ( T. S. Shin ),전해열 ( H. Y. Jeon ) 한국유기농업학회 2003 韓國有機農業學會誌 Vol.11 No.1
This study was conducted to established method of culture for Paecilomyces japonica using an egg. Mycelia grew favorably at the temperature of 22~26℃ on eggs. 5.1g of dry matter basis(average 7.2㎝ of longer and 199.6 of numbers) of artificial fruiting bodies were harvested at 60 days after inoculation from one of egg. Commercial fruiting bodies of Paecilomyces japonica from silkworms was used for comparative nutriental contents. Cordycepin contents of fruit bodies of Paecilomyces japonica cultivated on eggs and silkworms were not significantly different. Crude fat contents of fruiting bodies of Paeilomyces japonica cultivated from eggs was significantly higher than from silkworms(P<0.05). Mn and Cu contents of fruiting bodies of Paecilomyces japonica cultivated from silkworms were significantly higher than from eggs(P<0.05),but Na, Mg, Fe and Zn contents were significantly higher from eggs(P<0.05). Glycine, Arginine and Proline contents in the fruiting bodies of Paecibmyces japonica cultivated from silkworms were tend to higher than from eggs, but Serine, cystein, methionine, isoleucine and phenylalanin were tend to higher from eggs. These results were made possible that possible mass production of artificial fruiting bodies of Paecilomyces Japonica cultivated on eggs.
조윤성(Y.-S. Cho),윤상윤(S.-Y. Yun),이욱화(U.-W. Lee),신철호(C.-H. Shin),이진(J. Lee),허성일(S.-I. Hur),김선구(S.-K. Kim),이효상(H.-S. Lee) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
This paper describes the development of robust processor for analyzing network state in Korean Energy Management System. The important function of topology processing is to convert the switching/device model into a bus/branch model by the status of switching devices. The state estimator also provides a consistent unified solution, not only for measurement of the observable system, but also for the unobservable system. The primary function of the online power flow is to provide a highly reliable and flexible power flow solution that can be used to solve a wide variety of power systems problems. The validity of the newly developed functions has been verified through comparative simulations with the existing EMS functions, which are currently in use in the Korean power system.
박진아,김선구,박승근,조평동,Park, J.A.,Kim, S.G.,Park, S.K.,Cho, P.D. 한국전자통신연구원 2006 전자통신동향분석 Vol.21 No.5
본 논문은 유비쿼터스 사회의 도래에 대비하여 국내 소출력 무선 산업의 현황파악을 목적으로 2006년도 상반기에 실시한 설문조사 결과를 제시하고 있다. 조사된 주요결과에 의하면, 국내 소출력 시장에서는 중소업체(평균종업원 수: 14명)가 대부분 기기를 제조하고 있지만, 무선마이크 또는 모형비행기 등의 일부 품목에서는 수입제품이 큰 비중을 차지하고 있으며, 제도개선 측면에서는 인증절차의 단순화에 대한 요구가 많았다.
이순복,김선구 ( S . B . Lee,S . K . Kim ) 한국축산학회 1986 한국축산학회지 Vol.28 No.11
This trial was carried out to investigate. the optimum feeding level of optimum concentrate level, when Korean native bulls were fed maize silage and water ad libitum. The level of concentrates in this trial were 1.0% (T₁), 1.5%(T₂) and 2.0%(T₃) of body weight, respectively. A total of nine Korean native bulls of average weight of 350㎏ with 3 heads per each treatment were fed for 90 days. The experimental design was a completely randomized design. The results obtained were summarized as follows: 1. Body weight gain of T₃ (122.6㎏) was significantly higher(P$lt;.05) than other treatments. 2. Daily intake of concentrate in T₃(7.8㎏) was significantly increased(P$lt;.05) and daily intake of maize silage was also significantly increased(P$lt;:.01) in T₁(27.5㎏). Feed conversion of DCP was higher in T₁(0.05㎏) and lower in T₂(0.79㎏). However, the differences were not statistically different(P$lt;.05). Feed conversion of TDN was higher in T₃(6.96㎏) without significant difference. 3. Rumen acetate concentration was the highest (P$lt;.05) in T₁(67.50%) and the lowest in T₃(62.35%). Rumen propionate concentration in T₁, T₂ and T₃ were 16.18%, 18.96% and 23.04%, respectively. 4. Dressing percent in T₃(58.90%) was significantly increased(P$lt;.05) and lean meat percent in T₁(47.4%) was significantly increased(P$lt;.05).