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백기진(Ki-Jin Baek),전병천(Byung-Chun Jeon),김영선(Young-Sun Kim) 한국정보과학회 1996 한국정보과학회 학술발표논문집 Vol.23 No.2B
ATM망을 통해서 기존 LAN 응용들을 서비스하고자 할 때, 기존의 LAN 에뮬레이션이나 IP over ATM 방식들은 IP 패킷 전송전에 ATM 망에서 연결을 설정하는데 필요한 목적지 클라언트의 ATM 주소(혹은 E.164 주소)를 알아야만 한다. 즉, ARP 서버로 ARP 요청 패킷을 보내서 그 응답으로 ATM 주소를 알아내도록 되어 있기 때문에 처리 시간도 길어질 뿐만 아니라 ARP 서버가 고장이 나면 통신을 할 수가 없게 되는 심각한 문제가 있다. 따라서, 본 논문에서는 ATMARP 프로토콜을 사용하지 않고 IP 주소에서 직접 E.164 주소로 매핑하는 방식을 비연결형 서버 망에 적용하여 비연결형 서버가 IP 라우팅 기능을 수행할 수 방안을 제안하고자 한다.
백기진(Ki-Jin Baek),전병천(Byung-Chun Jeon),김영선(Young-Sun Kim) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.1A
ATM 망에서 기존 LAN 응용들을 지원하기 위한 방법으로서 ITU에서는 공중망 서비스 제공자가 ATM 망내에 “비연결형 서버(CLS : Connectionless Server)를 설치하고 기존 LAN과 ATM 망간의 인터페이스로 IWU(Interworking Unit)”를 두어 비연결형 서비스를 지원하도록 제안하고 있다. 그러나 인터넷상의 IP 멀티캐스트 응용들이 점차로 늘어남에 따라 기존 CLS 망을 이용하여 화상회의나 인터넷 방송과 같은 멀티캐스트 서비스를 지원할 수 없는 상황이 되었다. 따라서 본 논문에서는 IP 멀티캐스트를 지원하지 않는 기존의 CLS 망에서 LAN과 CLS의 접속 장치인 CLSAD(Connectionless Service Access Device)에 IP 멀티캐스트 라우팅 기능을 추가하여 IP 멀티캐스트를 지원할 수 있도록 하는 방안을 제안하고자 한다.
백기진(Ki Jin Baek),구광수(Kwang Soo Koo),백운효(Un Hyo Baek),홍예주(Yae Ju Hong),박현권(Hyun Kwon Park) 한국발육발달학회 2008 한국발육발달학회지 Vol.16 No.4
The purpose of this study is to provide basic data for selecting prominent athletes by analyzing morphological features of the excellent track and field athletes. 80 high school athletes were selected as the subjects and then they were divided into 8 groups (10members in each group) according to their level and sports events. After measuring skinfolds, girths, breadths, the trochanterion, and forms, the mean value and standard deviation of the raw data were calculated in relation to the treatment period and the group. And two-way ANOVA by repeated measurement was used to identify the average difference. The results of this study were as follows; First, the skinfolds of the throwing athletes were more than those of the sprint, jumping and long distance running athletes. Second, the girths of the excellent throwing athletes were bigger than those of the excellent sprint, jumping and long distance running athletes. And the girths of the non-excellent throwing athletes were bigger than the non-excellent sprint, jumping and long distance running athletes. Third, the breadths of the throwing athletes were broader than those of the sprint, jumping and long distance running athletes. And the breadths of the sprint and jumping athletes were broader than those of the long distance athletes. Fourth, the trochanterion of the sprint, jumping, throwing athletes were bigger than those of the long distance running athletes. Fifth, the throwing athletes` endomorphic and mesomorphic were larger than those of the sprint, jumping and long distance athletes. The ectomorphic of spring, jumping and long distance athletes were larger than that of the throwing athletes. In conclusion, the somatotype of the throwing athletes was bigger than other sports events athletes. Sprint and jumping athletes` somatotype were relatively same and that of the long distance athletes` was smaller. The best condition of the athlete`s body figure will enhance the performance of them. Finding right body figure for each sport events when selecting athletes will be very useful.