• Title/Summary/Keyword: Lee Sam

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A Study on Anti-Vibration Materials for Roadbed (철도 노반재료의 정.동적특성 연구)

  • Shin, Min-Ho;Lee, Il-Wha;Lee, Sun-Bock;Kim, Su-Il;Huh, Young;Kim, Su-Sam
    • Proceedings of the KSR Conference
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    • 1998.05a
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    • pp.588-595
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    • 1998
  • The purpose of this study is to perform development of techniques for reduction of ground vibration caused by highspeed railway. At the first year, we have researched for the statically and dynamically characteristics of materials that could reduce the propagated ground vibration. The tire chip and blast furnace slag had been selected as the reduction material. And we have tested these materials by computer analysis.

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Transmission of Traffic Information Using a Terrestrial Digital Multimedia Broadcasting System

  • Cho, Sam-Mo;Kim, Geon;Jeong, Young-Ho;Ahn, Chung-Hyun;Lee, Soo-In;Lee, Hyuck-Jae
    • ETRI Journal
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    • v.28 no.3
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    • pp.364-366
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    • 2006
  • This letter introduces an efficient transmission of traffic information through a terrestrial digital multimedia broadcasting system, which is a multimedia and mobility empowered option of the European digital audio broadcasting system. By adapting Korean characteristic traffic information into the transport protocol expert group messages in the traffic information delivery, a highly efficient traffic information system was implemented and tested in Korea.

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FUZZY PAIRWISE STRONG PRE-IRRESOLUTE CONTINUOUS MAPPINGS

  • Lee, Hyo-Sam;Lee, Joo-Sung;Im, Young-Bin
    • Journal of applied mathematics & informatics
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    • v.28 no.5_6
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    • pp.1561-1571
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    • 2010
  • We define and characterize a fuzzy pairwise strong pre-irresolute continuous mapping and a fuzzy pairwise strong pre-irresolute open mapping on a fuzzy bitopological space.