• Title/Summary/Keyword: Natural park

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Feedback scope for fault detection and localization

  • Hunsang Jung;Park, Youngjin
    • 제어로봇시스템학회:학술대회논문집
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    • 2002.10a
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    • pp.32.6-32
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    • 2002

  • The damage localization of the structural system using the natural frequency measurement only is proposed. The existing methods use the changes of mode shape, strain mode shape or curvature mode shape before and after the damage occurrence as these shapes carry the geometric information of the structure. Basically, the change of natural frequencies of the structure can be used as the indicator of the damage occurrence but not as the indicator of the damage location as the natural frequency changes does not carry the geometric information of the structure. In this research, the feedback scope method that measures the natural frequency changes of the structure with and without the feedback Ioo...

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Alkaloidal Components of panax ginseng

  • Han, Byung-Hoon;Park, Myung-Hwan;Han, Yong-Nam;Woo, Lin-Keun
    • Archives of Pharmacal Research
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    • v.9 no.1
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    • pp.21-23
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    • 1986

  • Over twelve alkaloids were delected in the roots of Panax ginseng C. A. Meyor. Among them three alkaloids were isolated and were identified as $N_{9}$-formylharman, ethyl $\beta$-carboline-1-carboxylate and perlolyrine on the basis of spectroscopic studies.

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Antioxidant Activity Screening on Crude Drugs (생약(生藥)의 항산화활성검색(抗酸化活性檢索) 연구(硏究))

  • Han, Byung-Hoon;Yoo, Shi-Yong;Park, Myung-Whan;Lee, Hye-Jung
    • Korean Journal of Pharmacognosy
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    • v.10 no.3
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    • pp.108-111
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    • 1979

  • In vivo antioxidant activities were screened over 30 kinds of crude drugs which are most frequently prescribed in oriental medicine. Of these, only Ginseng Radix, Cimicifugae Rhizoma, Zingiberis Rhizoma(steam dried), Alismatis Rhizoma, and Liriopes Tuber were shown to be positive in the activity.

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