• 제목/요약/키워드: Il Woo Lee

검색결과 2,898건 처리시간 0.048초

원자력 발전소 디지털 제어 시스템을 위한 네트워크의 실시간 특성 해석 (Real-Time Characteristic Analysis of a DCS Communication Network for Nuclear Power Plants)

  • 이성우;김석곤;송성일
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
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    • pp.797-801
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    • 2003
  • In this paper, a real-time communication method using a PICNET-NP (Plant Instrumentation and Control Network for Nuclear Power plant) is proposed with an analysis of the control network requirements of DCS (Distributed Control System) in nuclear power plants. The method satisfies deadline in case of worst data traffics by considering aperiodic and periodic real-time data and others.

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복지형 NEV용 외전형 인-휠 SRM 설계 (Design of Outer Rotor Type In-Wheel SRM for Welfare Neighborhood Electric Vehicle)

  • 정광일;이동희;안진우
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2010년도 추계학술대회
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    • pp.323-324
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    • 2010
  • In this paper, outer rotor type of in-wheel switched reluctance motor(SRM) has been design and analyzed for Welfare Neighborhood Electric Vehicle(WNEV). Designed outer rotor type of in-wheel SRM is set to 4-wheel of WNEV. the motor is 6/8 and outer rotor type. and the driving load and motor characteristics are determined and designed.

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갯완두(Lathyrus japonicus) 에탄올 추출물의 항산화 및 항염증 효능 (Antioxidant and anti-inflammatory activities of Lathyrus japonicus ethanol extracts)

  • 박윤경;이명석;고석천;이정민;임미진;김경우;김현수;김지율;김철환;원정혜;이대성;오건우
    • 한국해양바이오학회지
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    • 제15권1호
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    • pp.1-11
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    • 2023
  • In the present study, the antioxidant and anti-inflammatory activities of ethanolic extracts from Lathyrus japonicus at concentrations of 50, 100, and 200 ㎍/mL were investigated in LPS-stimulated, RAW264.7 cells. Antioxidant properties were determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging assays and ferric reducing antioxidant power assay. In addition, the production of reactive oxygen species (ROS) was measured using the 2',7'-dichlorofluorescein diacetate (DCFH-DA) probe by flow cytometry. To examine the anti-inflammatory activity of the extracts of L. japonicus, their effects on the levels of nitric oxide (NO); production of cytokines such as interleukin (IL)-1β, IL-10, and tumor necrosis factor-α (TNF-α); and the activities of enzymes such as inducible NOS (iNOS) and cyclooxygenase-2 (COX-2) were assessed. The IC50 values of the DPPH and ABTS radical scavenging assays were 476.09 ± 1.50 and 34.91 ± 0.37 ㎍/mL, respectively. In addition, L. japonicus extracts not only inhibited ROS production, but also the production of NO, IL-1β, and IL-10, and the activity of iNOS in a dose-dependent manner. In summary, the ethanolic extracts of L. japonicus could be used as a functional food additive and an anti-inflammatory agent owing to their antioxidant and anti-inflammatory activities

Deinococcus radiodurans R1 Lysate Induces Tolerogenic Maturation in Lipopolysaccharide-Stimulated Dendritic Cells and Protects Dextran Sulfate Sodium-Induced Colitis in Mice

  • Song, Ha-Yeon;Han, Jeong Moo;Kim, Woo Sik;Lee, Ji Hee;Park, Woo Yong;Byun, Eui-Baek;Byun, Eui-Hong
    • Journal of Microbiology and Biotechnology
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    • 제32권7호
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    • pp.835-843
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    • 2022
  • Deinococcus radiodurans is an extremophilic bacterium that can thrive in harsh environments. This property can be attributed to its unique metabolites that possess strong antioxidants and other pharmacological properties. To determine the potential of D. radiodurans R1 lysate (DeinoLys) as a pharmacological candidate for inflammatory bowel disease (IBD), we investigated the antiinflammatory activity of DeinoLys in bone marrow-derived dendritic cells (BMDCs) and a colitis mice model. Lipopolysaccharide (LPS)-stimulated BMDCs treated with DeinoLys exhibited alterations in their phenotypic and functional properties by changing into tolerogenic DCs, including strongly inhibited proinflammatory cytokines (TNF-α and IL-12p70) and surface molecule expression and activated DC-induced T cell proliferation/activation with high IL-10 production. These phenotypic and functional changes in BMDCs induced by DeinoLys in the presence of LPS were abrogated by IL-10 neutralization. Furthermore, oral administration of DeinoLys significantly reduced clinical symptoms against dextran sulfate sodium-induced colitis, including body weight loss, disease activity index, histological severity in colon tissue, and lower myeloperoxidase level in mice. Our results establish DeinoLys as a potential anti-inflammatory candidate for IBD therapy.

Bis(p-substituted phenyl) 2-decyloxyterephthalate의 액정 특성에 대한 치환기 효과 (The Effect of Substituents on LC Behavior of Bis(p-substituted phenyl) 2-Decyloxyterephthalate)

  • 박주훈;이종규;최옥병;소봉근;이수민;이준우;진정일
    • 대한화학회지
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    • 제44권2호
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    • pp.127-137
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    • 2000
  • 비스(파라-치환페닐)테레프탈산 에스테르의 중앙 테레프탈산 벤젠고리 측면에 데실옥시기가 결합하고 있는 열한개의 새로운 화합물을 합성하였고, 이들의 열적 및 액정 성질을 DSC와 가열판이 부착된 편광현미경을 사용하여 조사하였다. 메소겐의 말단 치환기 X= -H(II-H), -F(II-F), -Cl(Il-Cl), -Br(Il-Br), -I(II-I), -$NO_2(lI-NO_2$), $-CF_3(II-CF_3$), -$OC_2H_5(II-OC_2H_5$), -$OC_4H_9(II-OC_4H_9$), -CN(II-CN) 및 -$C_6H_5(Il-C_6H_5$)로 바꾸었다. $II-OC_2H_5,\;II-OC_4H_9$, 및 $II-C_6H_5$는 단방성 네마틱 액정이었으며, II-H, lI-F, II-Cl, Il-Br, II-I, $II-NO_2$, $II-CF_3$, 및 Il-CN은 액정이 아니었다.

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