• Title/Summary/Keyword: Kyung Shin Ho

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Design and Implementation of Network Security Scanner for Analyzing UNIX Vulnerabilities (전산망보안점검 도구의 설계 및 구현)

  • Byun, Kyung-Geun;Sim, Young-Chul;Shin, Hoon;Im, Hwi-Sung;Im, Chae-Ho
    • Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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    • 1996.11a
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    • pp.133-142
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    • 1996
  • 인터넷에서의 보안 취약점을 점검분석하기 위한 방법으로서 네트워크를 통해 외부에서 시스템의 문제점을 점검 보고하는 도구를 WWW 서버의 CGI 를 이용하는 시스템형태로 설계하고 구현하였다.

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INVESTIGATION OF DOMAIN STRUCTURES IN $LiNbO_3$ SINGLE CRYSTALS GROWN BY CZOCHRALSKI METHOD

  • Do, Won-Joong;Kyung Joo;Shin, Kwang-Bo;Auh, Keun-Ho
    • Proceedings of the Korea Association of Crystal Growth Conference
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    • 1998.06a
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    • pp.111-114
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    • 1998
  • Lithium Niobate {{{{ { LiNbO}_{ 3} }}}} single crystals grown by Czichralski method at the congruent composition, have ferroelectric microdomains. These microdomins were investigated by chemical etching with hydrofluoric acid (HF) AND NITRIC ACID ({{{{ { HNO}_{3 } }}}}), and by us ing optical microscopy, scanning electron microscopy and atomic force microscopy

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Comparisons of Position Error Characteristics and DOP Between TOA and TDOA Technique (TOA기법과 TDOA기법의 위치 오차 특성 및 DOP 비교)

  • Shin, Dong-Ho;Sung, Tae-Kyung
    • Journal of Institute of Control, Robotics and Systems
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    • v.6 no.10
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    • pp.923-927
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    • 2000
  • This paper presents a relationship between DOP for TOA and TDOA is defined using the error covariance matrix of TDOA. It is analytically shown that the error ellipsoid of TOA is as same as that of TDOA in magnitude and in orientation, which means that DOP for TOA is identical to the DOP for TDOA. By computer simulation, the positioning performance of two methods is compared, and we verify our assertion.

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