• 제목/요약/키워드: Il Woo Lee

검색결과 2,898건 처리시간 0.042초

Photographic Time of Minimum Light for VV Orionis

  • Lee, Woo-Baik;Nha, Il-Seong
    • 천문학회지
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    • 제8권1호
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    • pp.25-27
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    • 1975
  • A time of minimum light for VV Orionis has been determined photographically using techniques developed by Jeong. The observed time of minimum light shows that VV Ori exhibits a constant orbital period. The O-C computed with the light elements given by Eaton is found to be $-0^d$, 0070. An attempt to correct for night-to-night shifts for plates taken on three nights in February and March 1975, was unsuccessful and thus the complete light curve initially planned was not obtained.

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직류시스템의 접지 구성 방식별 인체 보호방법 분석 (Analysis of Body Protection Methods according to the Grouding types of DC systems)

  • 김동우;임용배;이상익;최명일;문현욱
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2015년도 제46회 하계학술대회
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    • pp.1519-1520
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    • 2015
  • 본 논문에서는 교류와 직류에 따른 인체 영향에 대한 특징과 차이점을 분석하였으며, 직류시스템의 접지방식에 따라 인체 보호방법을 분석하여 각각의 분류방식에 따른 적절한 보호방법을 제시하였다.

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On the Iterated Duggal Transforms

  • Cho, Muneo;Jung, Il-Bong;Lee, Woo-Young
    • Kyungpook Mathematical Journal
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    • 제49권4호
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    • pp.647-650
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    • 2009
  • For a bounded operator T = $U{\mid}T{\mid}$ (polar decomposition), we consider a transform b $\widehat{T}$ = ${\mid}T{\mid}U$ and discuss the convergence of iterated transform of $\widehat{T}$ under the strong operator topology. We prove that such iteration of quasiaffine hyponormal operator converges to a normal operator under the strong operator topology.

액상 레드머드 첨가율에 따른 습식 흙콘크리트의 특성 (Characteristic of Wet Soil Concrete according to Liquefaction Red mud Addition Ratio)

  • 강혜주;황병일;우미경;이영원;강석표
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2018년도 춘계 학술논문 발표대회
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    • pp.81-82
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    • 2018
  • In this paper, we investigate the characteristics of wet soil concrete according to the addition ratio of liquefaction red mud addition rate by liquefying red mud. as a result, the compressive strength decreased and the water absorption ratio increased as the liquefaction red mud addition rate increased.

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유전알고리즘을 이용한 궤적 최적화에 관한 연구 (Trajectory Optimization Using Genetic Algorithm)

  • 최석민;손진우;원태현;배종일;이만형
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1998년도 하계학술대회 논문집 B
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    • pp.703-705
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    • 1998
  • In this paper, we have suggested the method of genetic algorithm to solve the trajectory optimization. The given nonlinear method is so complex and modeling is not easy. Also, we have suggested the nonlinear programming combined with genetic algorithm. The proposed algorithm gives simple and time-reducing method in solving nonlinear dynamic systems.

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