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강준혁(JoonHyuk Kang),마동희(DongHee Ma),천경섭(KyungSub Chun),전승(Seung Jeon) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The operation of Tail gate depends on moment, such as Tail gate/Gas lifter, and also resistance, such as Weather strip/Air tight. Even though moment and resistance are critical factors for operation of Tail gate, we used to set up the Gas lifter-layout by engineering know-how and by trial and error, and without no consideration for resistance. Thus, it might be impossible that we set up the Gas lifter-layout optimized by prediction. In this paper we introduce air tight resistance value as a result of test, and introduce kinematic solution to predict the improved operation. The program, developed on EXCEL VBA by reflecting the test result and kinematic solution, should facilitate to improve operation of Tail gate by the prediction.
강준혁 ( Joonhyuk Kang ) 한국산업보건학회 (구 한국산업위생학회) 2016 한국산업보건학회지 Vol.26 No.4
Objectives: The objective of this study is to assess relative safety level of the decompression tables in Ministry of Employment and Labor Public Notice No. 2014-28 in comparison with overseas decompression tables. Methods: Decompression tables in the Public Notice No. 2014-28 were compared with examples from Japan, the USA, Canada, and France in terms of ascent rate, surface intervals after exceptional exposures, oxygen decompression and allowable partial pressure, depth limits in air diving, no-decompression limits, and decompression time and methods. Results: Public Notice No. 2014-28 does not include air diving depth limits, exceptional exposure limits, mandatory surface intervals after exceptional exposures, oxygen decompression, and surface decompression schedules. Its decompression time was found to be the shortest among the five decompression tables. Conclusions: Public Notice No. 2014-28 has the lowest safety level in comparison with overseas decompression tables. Deck decompression chambers are not applicable due to no regulations on surface interval and oxygen use in the chamber for decompression.
기기간 직접통신을 위한 위치 정보 기반의 기기 식별 방법
박은혜(Eunhye Park),강준혁(Joonhyuk Kang) 한국통신학회 2013 韓國通信學會論文誌 Vol.38 No.10(통신이론)
최근 스마트 모바일 기기의 급증으로 데이터 트래픽이 증가하여, 이를 완화시킬 수 있는 기기간 직접통신에 관한 관심이 점점 높아지고 있다. 기존의 기기간 직접통신 기술에서의 통신 대상 기기를 인식하는 방법은 리스트형식으로 통신 가능 기기를 나열하는 방식으로, 사용자 친화적인 인터페이스를 지니고 있지 않다. 본 논문에서는 이를 해결하기 위해 위치정보에 기반하여 직접통신 대상 기기를 식별하는 알고리즘을 제안하고, 정립한 분석 모델을 통해 알고리즘의 정확도를 분석하였으며, 시뮬레이션을 통해 확인하였다. 제안하는 알고리즘은 기존보다 대상 기기 선정이 간단하고 직관적인 방식으로, 좀 더 편리하고 실용적인 통신 방식을 제공하는데 기여할 수 있을 것이다. Recently the interest on device-to-device (D2D) communication has been increased due to the growing popularization of smart phones and tablet PCs. However, existing device identification mechanisms of D2D communication provide a text-based long list of possible devices, which leads the users to avoid to use D2D techniques. In this paper, we propose a location-based device identification technique for D2D communication. This paper describes the algorithm, analyzes its accuracy using analytical models, and verifies the results using computer simulations. The proposed algorithm is more user-friendly and intuitive way than existing D2D techniques.