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류병한,김경수,임순용 한국통신학회 1997 韓國通信學會論文誌 Vol.22 No.11
In this paepr, we propose a dynamic multicast routin algorithm for constructing the delay-constrained minimal spanning tree in the VP-based ATM networks, in which we consider the effiiciency enen in the case wheree the destination dynamically joins/departs the multicast connection. For constructing the delay-constrained spanning tree, we frist generate a reduced network consisting of only VCX nodes from a given ATM network, originally consisting of VPX/VCX nodes. Then, we obtain the delay-constrained spanning tree with a minimal tree cost on the reduced network by using our proposed heuristic algorithm. Through numerical examples, we show that our dynamic multicast routing algorithm can provide an efficient usage of network resources when the membership nodes frequently changes during the lifetime of a multicast connection. We also demonstrate the more cost-saving can be expected in dense networks when applyingour proposed algorithm.
류병과 龍仁大學校 武道硏究所 1997 武道硏究所誌 Vol.8 No.2
Taekwondo, literally ˝the way of kicking and punching ˝is currently one of the most widely practiced martial arts sport in the world. Taekwondo became a famous sport as a olympic sport and it made change essential of it´s own displine. It creature the word ´compititior ´ in culture of Taekwondo which made new concept of sportic training. Lee(1995) defined Taekwondo as a one of sports and Kim(1997) defined Taekwondo as a dinamic martial art which can develop personality. The reson for these two different define can exist in a same time is current Taekwondo has contained these two different cartegori of charicter at same time. Kim un yong amphasized that ˝Taekwondo has to wholly changes as a sport and that´s the only way to survive˝. But the changes bring cultural differences in Taekwondo discipline. The purpose of this study is that to find out the structural charistristics of culture of Taekwondo discipline to rebuild educational essential of Taekwondo discipline. There are two conception exist in discipline of Taekwondo at same time. First one is traditional conception of discipline itself and second one is new concept of discipline fits on sport called as ´training ´. But training is currently widely using in stead of discipline in the Taekwondo. Sabum changed to coach or instructor. Dojang changed to gym(cheyeukwan) and Dobok changed to training uniform. And these kinds of changes lead the change in meaning and philosophy of Taekwondo discipline itself. Dan-ryen is the most important meaning of discipline but this is almost disappears in cullent concept of training. The main concept of training is skill which the main factor of competition. Training is focus on practice of skill and the superial goal of the training is winning the game. So the main concepts of discipline which like cleaning mind and body, respects sabum are changed and disappeared. For the furture development of Taekwondo, the meaning of discipline have to coming back to Taekwondo. Taekwondo discipline is important because discipline is Taekwondo itself.