• Title/Summary/Keyword: Choi Young Sung

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Analysis and Verification for Cloud Services in Microsoft (마이크로소프트 클라우드 서비스 안정성 점검 및 분석)

  • Young-Min Kim;Hyoung-Kee Choi
    • Proceedings of the Korea Information Processing Society Conference
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    • 2024.05a
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    • pp.239-240
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    • 2024
  • OneDrive 는 Microsoft 에서 제공하는 클라우드 스토리지 서비스이다. OneDrive 데스크톱 앱은 사용자가 로그아웃한 이후 재로그인을 시도할 때 사용자 기기에 저장되어 있던 토큰을 사용해 로그인을 진행하며, 사용자의 패스워드를 추가로 요구하지 않는다. 이는 로그아웃한 사용자의 유효한 로그인 정보가 기기에 남아있음을 의미하며, 본 연구에서는 이를 활용해 OneDrive 의 토큰 저장소를 분석하고 토큰 이식 공격이 가능함을 보인다.

3-Dimensional Fatigue Life Evaluation for Major Components of Nuclear Power Plant (원전 주요기기의 3차원 피로수명 평가)

  • Ahn, Min-Yong;Bae, Sung-Ryul;Park, Young-Jae;Chang, Yoon-Suk;Choi, Jae-Boong;Kim, Young-Jin;Jhung, Myung-Jo;Choi, Young-Hwan
    • Proceedings of the KSME Conference
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    • 2004.11a
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    • pp.102-107
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    • 2004
  • In general, major components of nuclear power plant have been evaluated based on 2-dimensional design codes conservatively. However, more exact assessment is necessary for continued operation beyond the design life. In this paper, 3-dimensional stress and fatigue analyses reflecting full geometry and monitored operating condition of reactor pressure vessel have been carried out. The analyses results showed that conservatism of current 2-dimensional evaluation based on design transient. Therefore, it is anticipated that the schemes developed from this research such as 3-dimensional finite element modeling, stress analysis and fatigue analysis related techniques can be utilized as fundamental tools for exact lifetime evaluation and license renewal of major nuclear components.

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Characteristics of Change in Properties of Self-Adhesive Butyl Rubber Waterproofing Sheet by Increasing the Amount of Reclaimed Rubber (자착식 부틸고무 방수시트의 재생고무 증량 배합에 따른 물성변화 특성)

  • Choi, Su-Young;Park, Jin-Sang;Choi, Sung-Min;Kwon, Young-Hwa;Kim, Young-Keun;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2021.11a
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    • pp.252-253
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    • 2021
  • In this study, butyl rubber, which is the main material constituting the self-adhesive butyl rubber waterproofing sheet, was mixed with reclaimed rubber, and tensile strength, tear strength, peeling resistance strength, and adhesion strength were measured for sample prepared by mixing ratio. As a result, it was confirmed that peeling resistance strength and adhesion strength decreased as the reclaimed rubber content increased, and tensile strength and tear strength did not change significantly.

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