• Title/Summary/Keyword: Ryu-Hee

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A survey of the action of Korean angelica plants on drug metabolism

  • Woo, Won-Sick;Shin, Kuk-Hyun;Ryu, Kyung-Soo
    • Archives of Pharmacal Research
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    • v.3 no.2
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    • pp.79-84
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    • 1980

  • Eight species of the genus Angelica in Korea were examined for the activity of affecting drug metabolism and for the presence of coumarins. The results showed that various parts, especially roots and fruits of Angelica plants had strong effects on drug metabolism and that they contained various derivatives of coumarins.

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Robust H$\infty$ FIR Filtering for Uncertain Time-Varying Sampled-Data Systems

  • Ryu, Hee-Seob;Kwon, Byung-Moon;Kwon, Oh-Kyu
    • Journal of KIEE
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    • v.11 no.1
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    • pp.21-26
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    • 2001

  • This paper considers the problem of robust H$\infty$ filter is derived by using the equivalence relationship between the FIR filter and the recursive filter, that would be guarantee a prescribed H$\infty$ performance in the continuous-time context, irrespective of the parameter uncertainty and unknown initial states.

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