• Title/Summary/Keyword: 김정수

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An Evaluation Technique for Atmospheric Dispersion Characteristics In Seoul Using Acoustic Sounding Profiler (SODAR/RASS 자료를 이용한 서울지역 대기확산 평가 기법)

  • 김정수;최양일;마창민
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 1999.10a
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    • pp.418-419
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    • 1999

  • 배출된 대기오염물질은 기상조건에 따라 농도가 크게 달라질 수 있으며 이러한 현상을 규명하기 위해서는 지상 및 상층기상 관측이 필수적이다. 본 연구에서는 서울지역의 발생가능한 대기오염상태를 판단할 수 기법을 개발하고자 고도별자동기상관측기(SODAR/RASS)로 측정한 고도별 풍향ㆍ풍속, 기온등의 매시간 자료를 분석하였다.(중략)

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Study on the preparation Of Octa(2-ethyhexyloxy) copper-phthalocyanine LB film (Octa(2-ethyhexyloxy) copper-phthalocyanine의 LB막 제작에 관한 연구)

  • 임준석;김영관;김정수
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1995.11a
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    • pp.228-231
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    • 1995

  • Phthalocyanine have a good sensitivity to the toxic gases like NO$_2$. Also its properties of good chemical and thermal suability give a potential to superiors gas sensing system. Depositioni of Octa(2-ethyhexyloxy) Copper Phthalocyanine is confirmed by transfers ratio, UB/visible spectra and current-voltage (I-V) characteristics.

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Structural Damage Identification by Using the Spectral Element Model and the Newton-Raphson Method (스텍트럴요소 모델과 Newton-Raphson 법을 이용한 구조손상규명)

  • Kim, Jung-Soo;Kwon, Kyung-Soo;Lee, U-Sik
    • Proceedings of the KSR Conference
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    • 2004.06a
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    • pp.921-926
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    • 2004

  • In this paper, a nonlinear structural damage identification algorithm is derived by taking into account the non-linearity of damage. The structural damage identification analyses are conducted by using the direct method and the Newton-Raphson method. It is found that, the Newton-Raphson method in general provides the better damage identification results when compared with the results obtained by the direct method.

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Rheological control to develop a self-consolidating ECC (자기충전용 ECC를 개발하기 위한 레올로지 특성에 관한 실험)

  • Kim, Jeong-Su;Lee, Jong-Han;Kim, Yun-Yong;Kim, Jin-Keun
    • Proceedings of the Korea Concrete Institute Conference
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    • 2009.05a
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    • pp.539-540
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    • 2009

  • A self-consolidating engineered cementitious composite (ECC), which exhibits tensile strain-hardening behavior in the hardened state, while maintaining self-consolidating properties in the fresh state, has been developed by employing electrosteric dispersion and stabilization.

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