• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.9
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• pp.1507-1513
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• 2010

The $CO_2$ emission can be decreased due to freedom of generator maintenance scheduling(GMS). This paper proposes assessment of $CO_2$ emission considering generator maintenance scheduling(GMS) and evaluates effect of the GMS on $CO_2$ emission. And also, this paper assesses the $CO_2$ emission and the probabilistic production cost simulation of nuclear and thermal power generators considering operation of hydro and pumped generator. The minimum reliability criterion level satisfied production cost minimization function model is used in this paper. The practicality and effectiveness of the proposed approach are demonstrated by simulation studies for a real size power system in Korea in 2010.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.127_128
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• 2009

A new technique using a search method which is based on fuzzy multi-criteria function is proposed for GMS(generator maintenance scheduling) in order to consider multi-objective function. Not only minimization of probabilistic production cost but also maximization of system reliability level are considered for fuzzy multi-criteria function. To obtain an optimal solution for generator maintenance scheduling under fuzzy environment, fuzzy multi-criteria relaxation method(fuzzy search method) is used. The practicality and effectiveness of the proposed approach are demonstrated by simulation studies for a real size power system model in Korea in 2010.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2009.11a
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• pp.311-312
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• 2009

가압 경수로에서 53,000 MWd/tU으로 연소된 사용후 핵연료의 PCI 영역에 대해 방사선 차폐형 성분 분석기기( Shielded EPMA)를 사용하여 반경방향에 대한 성분분포를 분석하였다. PCI 영역에서 산화층의 두께는 13um 이었으며, 핵분열생성물의 침투 두께는 시료에서 약 10 um 이내로 나타났다. 이 두께에 침투된 핵종의 총 농도는 1~2 wt%로 관찰되었다. 주요핵종은 Cs 0.5~0.7 wt%, Mo 0.2~0.3 wt%, Pd, Ru, Nd, Ce등이 0.1~0.2 wt% 로 관찰되었다.

• The Journal of Korean Medical History
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• v.17 no.2
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• pp.63-72
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• 2004

In 1189's ZhongXiuZhengHuoJingShiZhengLeiBeiYongBenCao(重修政和經史證類備用本草), we took a look at the medicinal herbs that mentioned JoSeon(朝 鮮), GoRyeo(高麗), BaekJe(百濟), SinRa(新羅), DongIn(東人), DongHae(東海), YoDong(遼東), and BalHae(渤海). In the face of Korea's Oriental medicine's reality of having medical texts only after the 2nd half of the GoRyeo(高麗) Dynasty, this study will provide the basis of finding the origin of Indigenous Herbal Medical Science that was founded in the late-GoRyeo(高麗), early-JoSeon(朝鮮) period.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.10a
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• pp.15-16
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• 2015

해저파이프라인 및 해저케이블 설치해역이 대수심으로 이동함에 따라 육지와는 다른 열악한 시공 환경에 놓이게 된다. 이때 파이프라인 및 케이블이 매설되는 해저지반 상태와 작업이 이루어지는 해역의 해상조건 등은 작업효율에 영향을 미치기 때문에 효율적인 시공이 필요하다. 본 논문은 구조물 매설에 앞서 해저지반 굴삭 작업을 수행하기 위해 ROV 트렌쳐의 하단에 장착되는 워터젯 굴삭기의 작업효율 및 시공성능 추정에 관한 연구이다. 먼저 전산유체해석을 통해 워터젯 굴삭기의 굴삭효율을 극대화할 수 있는 노즐 수량을 정하였고, 모형실험을 수행하여 굴삭기의 시공성능을 예측할 수 있는 최대 굴삭심도 및 최대 굴삭속도를 파악하였다. 이를 바탕으로 실제 운용중인 워터젯 굴삭장비들과 시공성능을 비교 분석하였다.

• Journal of Electrical Engineering and Technology
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• v.5 no.1
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• pp.8-15
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• 2010

A new technique using a search method which is based on fuzzy multi-criteria function is proposed for GMS(generator maintenance scheduling) in order to consider multi-objective function. Not only minimization of probabilistic production cost but also maximization of system reliability level are considered for fuzzy multi-criteria function. To obtain an optimal solution for generator maintenance scheduling under fuzzy environment, fuzzy multi-criteria relaxation method(fuzzy search method) is used. The practicality and effectiveness of the proposed approach are demonstrated by simulation studies for a real size power system model in Korea in 2010.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.08a
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• pp.112.1-112.1
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• 2013

국내 반도체 생산 업체는 전세계 반도체 시장에서 높은 점유율을 차지하고 있음에도 불구하고, 핵심 생산 장비는 대부분 수입에 의존하고 있는 상태이다. 특히, 고용량/대면적/초정밀 제품을 지향하는 개발추세에 따라 핵심 생산 장비에서 크라이오펌프의 활용도가 크게 증가하고 있다. 이에 기존의 G-M 냉동기 크라이오펌프에서 구조가 간단하고 장수명 및 저진동의 장점을 가진 맥동관 냉동기 크라이오펌프 대체 적용 개발 및 국산화를 도모하고자 한다. 본 연구에서는 지식경제부 제조기반산업원천 기술사업 "급속재생형 저진동 크라이오펌프 기술 개발" 사업을 통해 개발된 16.5 inch/10 inch 크라이오펌프 시제품 및 완제품 제작 과정 및 성능 시험결과, 맥동관 냉동기 장점, 국산화 전략 등에 대해 소개 하고자 한다.

• Korean Journal of Acupuncture
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• v.20 no.1
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• pp.45-55
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• 2003

Backgrounds : It has been investigated about ageing theory. However, ageing mechanism still remains to be unknown. Since Harman proposes that ageing and ageing related diseases might be due to oxidative damage and these are modifiable by genetic and environmental factors. For designing an optimal nutritional countermeasure against ageing and ageing related disease, it is necessary to understand the ageing mechanism and other reactive species. Objectives : Schizandra Chinesis has been clinically used to treat brain disease, respiratory or inflammatory disease etc. in Oriental medicine. The purpose of this study is to investigate the scavenging effect of Schizandrae Fructus herbal-acupuncture solution(SFHA) on NO, DPPH and IL-4. Results : The results are summarized as follows; (1) There is a significant scavenging effect of SFHA on NO in 0.1, 1, 10mg/ml group after 24hrs. (2) There is a significant scavenging effect of SFHA on DPPH in 1, $10{\mu}g/ml$ group. (3) There is a significant inhibitory effect of SFHA on IL-4 in 1, 10, $100{\mu}g/ml$ group. Conclusions : These findings indicate that SFHA can be used as antioxidant or antiimflammatory drug. But further study is needed about the effect of SFHA.

• The Korean Journal of Malacology
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• v.27 no.1
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• pp.77-86
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• 2011

The unwanted artificial oil-spill has severely contaminated the coastal environment in the world. Level of contamination has so far been monitered by various indicator species including mussel, oysters, flounder, and cockle. In this study, we decided to use the oyster as a model organism to observe the morphological changes being exposed to the artificial oil-spill in the coastal areas in Taean, Korea. The oysters were collected from four local sites (Sindu-ri, Uiwang-ri, Jonghyeon-dong, Ansan and Uihang-ri) exposed to various levels of pollution after an oil spill in Taean. Microscopic analysis of the hepatopancreatic microstructure in the digestive gland from the collected oysters show that the swelling, whorl, and destruction phenomenon of the nuclear membrane, a well-known microstructure induced by heavy metal exposure, was observed. Nuclear body (Nb), another typical characteristic of contamination or infection were also observed in some samples. Necrosis was observed in tissue samples collected from the area with a high degree of oil pollution. In addition, parasite-like particles (virus, perkinsus) were observed in most samples. Taken together, these results suggest that oil contamination in the oyster habitats influences the cytopathological changes in Crassostrea gigas.

• Journal of Microbiology and Biotechnology
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• v.14 no.4
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• pp.745-750
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• 2004

The objective of this collaborative study was to establish a Korean standard of Japanese encephalitis (JE) vaccine (mouse brain-derived, formalin-inactivated) for potency assay. A candidate preparation proposed as a Korean standard was provided by GreenCross Vaccine, and six laboratories, including one national control laboratory and five manufacturers of JE vaccine, participated in the study. The potency of the candidate preparation and a reference standard obtained from Japan was estimated by mouse immunogenicity assay using the in vitro plaque reduction neutralization test (PRNT). The results of 72 assays conducted by the 6 laboratories showed that the overall mean potency estimate of the candidate preparation was 2.455 log median plaque reduction neutralization antibody titer per 0.5-ml dosage administered twice in mice at 7-day intervals, and that the mean potency ratio of the candidate preparation relative to the reference standard was 1.074. The potency estimates were quite variable among laboratories irrespective of the preparation. The variability of assays assessed by Z scores and coefficient of variation (CV) were in general within the level of acceptance (Z scores within $\pm3$ and $CV\;\leq\;15%$). Therefore, we concluded that the candidate preparation would be suitable as a national standard for testing the potency of JE vaccine (inactivated).