• 원예과학기술지
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• 제31권6호
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• pp.764-771
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• 2013

최근 고추재배에 있어 CMV-P1감염은 상품성 저하와 생산량 감수를 발생시키는 매우 심각한 문제이다. 본 실험에서는 역병 저항성 품종인 PR계통을 포함한 국내 시판 56품종과 미국에서 도입해 온 31품종 도입자원 및 농촌진흥청 유전자원센터(RDA Genebank)로부터 받은 112개의 고추 유전자원을 CMV-P1 저항성 검정에 사용하였다. 저항성 검정은 인공 접종 후 24일 후와 51일 후 ELISA를 실시하였다. 36개 시판품종 중 '무한질주' 품종이 CMV-P1에 저항성이었다. 모든 PR품종과 중도저항성인 'NuMex Twilight'와 'Chainese Giant'를 제외한 29개 외국 도입고추는 감수성이었다. RDA Genebank의 112계통의 고추 유전자원에서는 저항성 계통이 9, 중도저항성을 나타내는 계통이 17, 나머지 86계통은 모두 감수성으로 조사되었다. 국내 시판 고추품종은 거의 CMV-P1에 높은 감수성을 보이는 것으로 확인되는 반면, 외국 도입자원과 유전자원의 17.2%가 저항성이거나 중도저항성으로 확인되었다. 본 연구 결과로 확인된 저항성 고추는 CMV-P1 저항성 고추육종에 유용한 유전자원으로 이용될 수 있다.

• 한국임상수의학회지
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• 제32권1호
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• pp.85-90
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• 2015

In this study, we investigated the number of categories of veterinary medical devices registered by Animal and Plant Quarantine Agency (QIA) by 2013. We also analyzed the sales of the veterinary medical devices reported from Korea Animal Health Product Association (KAHPA) from 2011 to 2013. The registration rate of veterinary medical devices has sharply increased since 2008, and a total of 495 categories from 141 companies were registered by the end of 2013. The multi-frequency products registered for companion animals were ultrasound imaging system, x-ray system, microchip & reader, telemetry system transmitter, and hematology analyzer. The veterinary medical devices for farm animals include marker, artificial insemination catheter, injector, and ultrasound imaging system. Of these products, the multi-frequency products dominated on the veterinary medical devices market. The market size of 223 (45.0%) veterinary medical devices was estimated to be approximately 20.6 billion Won in 2013; the proportion of domestic products and imports was 56% to 44%; the proportion of domestic demand and export was 82% to 18%, respectively. This study suggested that the registration and sales of the veterinary medical devices have gradually increased as the demand of health care services got bigger in Korea.

• 에너지공학
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• 제21권3호
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• pp.292-300
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• 2012

한수원 중앙연구원은 2007년부터 정부과제의 하나로 열출력 4361MWt GEN.III+ 원전인 APR+를 개발하고 있다. APR1400에 비해 보다 개선된 안전성과 경제성을 갖는 원전을 개발하기 위해 국내외 건설 중인 원전설계와 해외 개발 중인 ALWR(Advanced Light Water Reactor)의 설계내용 및 후쿠시마 원전사고로부터 도출된 개선사항을 반영하여 한국 실정에도 맞고, 해외 수출형 원전에도 부합되는 신개념원전 설계를 진행하고 있다. 기술개발 2단계인 표준상세설계에서 2회의 경제성 평가가 수행되었다. 2단계 표준상세설계 2차 경제성 평가결과 APR+ N-th호기는 국내석탄화력 1000MWe급 대비 24.6% 경쟁력우위와 해외원전 대비 충분한 경쟁력을 갖는 것으로 평가되었다.

• 한국자원식물학회지
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• 제13권3호
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• pp.213-218
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• 2000

홍화의 새로운 품종육성을 위하여 국내외에서 수집된 홍화의 외관상 나타나는 형태적인 특성을 조사한 결과를 요약하면 다음과 같다. 1. 수집된 홍화의 16계통중 단간(90∼110cm)인것이 6계통, 중간(111∼130cm)인 것은 5계통, 장간(131cm이상)인것은 5계통이었으며 장간은 국외 도입계통이었다. 2. 국내 수집 종 2계통은 주당 분지수가 11∼13개의 소분지형이었으며 도입종들은 50개이상의 다분 지형이었다. 3. 잎의 형태는 장타원형이 3계통, 피침형이 10계통, 넓은 선상형은 3계통으로 피침형이 가장 많았으며 잎의 가장자리 거치형태는 파도 물결 모양의 둔거치가 7계통으로 가장 많았고 4계통은 거치가 있었으며 깊게 찢어진 심열거치는 5계통이었다. 4.꽃의 색깔은 백색 1계통, 황색 13계통, 주황색 2계통이었으며 두장화의 형태는 원뿔형이 대부분이며(14계통)편형이 2계통이었고 화두 포엽의 끝은 가시형이 11계통이었고 무가시형은 5계통이었다. 5. 종자의 형태는 원뿔형이 11계통, 타원형은 5계통으로 국내 수집계통은 모두 원뿔형이었으며 도입계통은 타원형으로 대립이었다.

• 전기학회논문지P
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• 제63권3호
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• pp.149-156
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• 2014

Generator of hydroelectric generating unit is to be protected by the digital protection IED. Now, any IED of large capacity for hydro power plant was not developed by domestic technology. This is because it is required for the generator of the high reliability technology and considered as due to the sale of the market of IED device is small. However, the protection IED must be develop by domestic technology to meet the advanced needs of the construction and replacement of electrical equipment in accordance with the new power plant development. In this paper, a digital algorithms for protection IED of large size of hydroelectric generating unit were designed. The algorithms consist of the stator protection, anti-motoring, overexcitation and loss of excitation. The performance of the algorithms were evaluated by using the simulation data collected from the PSCAD/EMTDC software. From test results, it can be seen that the developed algorithms were not maloperation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 A
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• pp.31-34
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• 2002

It studied modelling about employing analog PSS in domestic 500MW grade standard thermoelectric power plant in this paper. Modeling and parameters were verified by simulation of PSS response characteristics measured in AVR step examination and using power plant system model parameters decided by generator characteristics test. Through this PSS modelling research, contributed in domestic electrical power system small signal stability as that do modelling to be possible exact analysis of power system.

• Journal of Plant Biotechnology
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• 제36권4호
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• pp.301-308
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• 2009

Higher agricultural commodity prices are a particular concern for food importing countries like Korea that has a very low self-sufficiency ratio. Korean people eat approximately 4.5 million metric tons of rice each year, which is met without a problem by domestic production. The domestic production of corn and soybean which are important raw materials for commercial food processing and livestock feed is only minimal. Demands of corn and soybean in Korea are approximately 7.2 million and 1.3 million metric tons per year, respectively. Since Korean consumers are reluctant to accept biotech (GM) foods, Korean food processors are fighting an up-hill battle in purchasing non-biotech (non- GM) crops which are becoming scarce.

• 전기학회논문지P
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• 제63권4호
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• pp.322-326
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• 2014

Recently, the LOE(loss of excitation) incidents are occurred in domestic synchronous generator frequently, the synchronous generator protection system has been much attention for the LOE protection of the incidents that threats synchronous generators and power systems. This paper was showed the characteristics and practices of distance relay that widely used LOE protection relaying in generator. Firstly, the operating characteristics and the impedance locus for LOE of the generator protection were introduced. Even if the conventional simulation program is used for modeling, but it is difficult to implement a LOE modeling and simulation of synchronous generator. So, the LOE relay operation data collected from thermal power plant and nuclear power plant in real fields were analyzed. By reviewing the applications of GE Mho relays, the reliability of LOE for synchronous generator protection in domestic were improved.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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• pp.224-225
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• 2019

Virtual reality technology can be defined as human-computer interface that makes virtual place of specific environments or situation is an interactive computer-generated experience taking place within a simulated environment. In order to combine virtual reality technology of domestic nuclear power industry, the R&D Project has been developing a virtual/augment reality system for nuclear power plant from April 2018 to March 2021. To effectively apply virtual reality technology of domestic nuclear industry, it is necessary to build virtual space similar to real environment. Therefore, This study is analysed 3d model status for nuclear power plant during the life-cycle, and suggested a method to build 3D cad model close to real environment.

• 상하수도학회지
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• 제13권3호
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• pp.29-35
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• 1999

The purpose of this study is to remove the organics, nitrogen and phosphorus using biosorption for the domestic sewage. The new process using biosorption is based on the methods of contact-stabilization, which remove the organics by absorbing them to the surface of the microorganism in the activated sludge. This process consists of biosorption reactor, biosorption clarifier, nitrifying reactor, nitrifying clarifier, denitrifying reactor, phosphorus uptake(polishing) reactor and final clarifier. The efficiency of removal could be reached 91% for organics, 76% for nitrogen, 90% for phosphorus in Eujungbu pilot plant. We operated the plant which irrigated $10m^3$ per day for sewage. During our operation the HRT(Hydraulic Retention time) was maintained for 10.5hr, but it could be reduced as 8.5hr according to our operation results.