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이동 IPv6 망에서 신뢰성 있는 멀티캐스트 서비스를 지원하는 빠른 핸드오버 메커니즘
신석재,유상조,Shin Seok-Jae,Yoo Sang-Jo 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.9a
Mobile IPv6 환경에서 빠른 핸드오버 프로토콜은 핸드오버 과정에서 발생하는 지연 시간을 줄임으로써 끊김 없는 핸드오버가 가능하도록 해준다 본 논문에서는 이러한 빠른 핸드오버의 이점을 멀티캐스트 서비스에 효율적으로 적용할 수 있는 FMIP-M 메커니즘을 제안한다. FMIP-M 메커니즘은 Mobile IPv6 환경에서 신뢰성 있는 멀티캐스트 서비스를 지원하는 빠른 핸드오버 메커니즘으로, 호스트의 이동 시 기존의 멀티캐스트 서비스에 빠른 핸드오버 프로토콜을 적용했을 때 발생하는 데이터 손실 문제를 이전 AR를 통해 보상 받게 되므로 신뢰성 있는 데이터 전송을 할 수 있게 한다. 또한 멀티캐스트 서비스 경로의 변화에 따라 멀티캐스트 서비스를 받는 방법 선택을 동적으로 수행하여 전송 경로를 최적에 가깝게 설정함으로써 좀더 효율적인 멀티캐스트 서비스가 가능하도록 한다. 다양한 환경에서의 성능 모델 분석 결과를 통해 제안된 방법이 패킷 전송 비용 측면에서 우수한 성능을 보였다. Fast handover protocol provides seamless handover in mobile Ipv6 networks by reducing handover latency. This paper proposes FMIP-M mechanism to apply this advantage of fast handover protocol to multicast service. The FMIP-M is a fast handover mechanism that supports a reliable multicast service in mobile Ipv6 networks. When hosts move other networks, they may have seine data missing and out-of-synch problems of multicast data. The proposed mechanism provides reliable multicast transmission by compensating data losses from the previous AR. Also it provides an additional function that is able to change multicasting service types dynamically in accordance with network status related with multicasting. So that it is able to make multicast paths very close to the optimum and more efficient multicast service is possible. The performance of the proposed mechanism is evaluated by a time analysis and simulations in various conditions.
강안수,신석재 明知大學校 産業技術硏究所 1996 産業技術硏究所論文集 Vol.15 No.-
In this study, the reaction characteristics of the electrochemical CO oxidation are investigated using the Pt and perovskite (La0.9Sr0.1MnO3) electrode deposited on solid electrolyte as a catalyst in order to establish the basic data for the development of highly effective catalytic reactors using a solid electrolyte cell. When the electrode surface was treated with O2, the electrode activity was found to increase significantly. This was because the O2 surface coverage increased upon the passage of CO the reaction between CO and adsorbed O2 increased quick1y. The maximum increase rate with respect to the open circuit condition was 5 times for Pt and 80 times for perovskite, respectively Under anodic polarization, it was found that the reaction rate increased as the, overpotential increased, where NEMCA was dominant. The reaction rate increased 3.2 times as high as the reaction rate under open circuit condition and also 37.1 times larger than the O²- supplying rate through the solid electrolyte. When perovskite was used as a catalyst, NEMCA or faradaic phenomenon was net observed with the reaction rate being changed negligibly. This was mainly ascribed to the low electrical conductivity of perovskite.
신석재(Suk-Jae Shin),김종일(Jong-IL Kim),한인수(In-Su Han),김흥일(Heung-IL Kim),정영철(Young-Chul Jung),최두석(Doo-seuk Choi) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
An experimental study on the exhaust heat recovery device of automobiles develop the exhaust heat recovery device of automobiles and test this equipment and install the back of catalysis convertible. This equipment have the existing BASE and new EHRS, T-EHRS. It has many conditions that load 0% and load 10% test rpm which are Idle, 1000rpm, 1500rpm, 2000rpm, 2500rpm and 25℃~80℃ of temperature of cooling water time by Warm-up. Idle coditions , load 0% and load 10%, same BASE, EHRS and T-EHRS. But this study looked at the load 0% have improved about 13% and load 10% have improved about 16% by rpm.