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멀티미디어 서비스를 위한 ATM망에서 가상경로의 대역폭 할당 제어에 관한 연구
장용철(Jang Yung Chul),이정재(Lee Jung Jei),오무송(Oh Moo Song) 한국정보처리학회 1997 정보처리학회논문지 Vol.4 No.6
Algorithm design is needed to optimized bandwidth which satisfy quality of service(QoS) requirements of vary traffic classes for Multimedia service in ATM networks. The diverse flow characteristics e.g., burstiness, bit rate and burst length, have to guarantee the different quality of service(QoS) requirements in Asynchronous Transfer Mode(ATM). The QoS parameter may be measured in terms of cell loss probability and maximum cell dely. In this paper, we consider the ATM networks which the virtual path(vip) concept is implemented by applying the Markov Modulated Deterministic Process method. We develop an efficient algorithm to computer the minimum capacity required to satisfy all the QoS requirements when multiple classes of on-off source are multiplexed on single VP. Using above the result, we propose a simple algorithm to determine the VP combination to achieve the near optimum of total capacity required for satisfying the individual QoS requirements. Numerical results are also presented to demonstrate the performance of the algorithm, when compared to the optimal total capacity required.
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장용철(Jang Yung Chul),오태석(Oh Teh Sok),오무송(Oh Moo Song) 한국정보처리학회 1997 정보처리학회논문지 Vol.4 No.8
Information processing using computer in generalized in the office automation. In spite of to be integrate and concise form of document through computer network, signature of document with hand have processed as ever. The security on document flow out severely unjust by reason of increment inverse function of computer. Because of revelation secret of enterprise result from unjust outflow, lots of loss of self-enterprise is occured. In this paper, we used efficiently document using the method, electronic approval system with encryption, for the resolving above problems. Also we persue maintenance of security for the important document and process document signature rapidly. Finally, we design and implementation of electronic approval system that take one's share of function between server and client using to be transformed Vernam's encryption technique in stored document.
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장용철(Jang Yung Chul),오무송(Oh Moo Song) 한국정보처리학회 1997 정보처리학회논문지 Vol.4 No.12
In image processing we encounter some tasks to detect ellipse or to discriminate the curves. LSM is well used to fit curves to ellipse but it can fail to fit correctly when fitting to defected one. To overcome this problem, we propose Modified LSM. Only 2-parameters among 5-paramaters are to be determined by LSM, while 3-parameters are to be calculated by the constrain that the curve must pass 3 given points. Those 3 points are selected by operator so as to have elliptic feature. Such proposed MLSM shows better result than genunal LSM in case when the ellipse is severely defected. and is proved to be good method for determing the human dentition.
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12주간 필라테스 매트 운동이 임산부의 신체구성, 요부근력, 요통 및 임신 스트레스에 미치는 영향
조나영(Na-Yung Cho),장용철(Yong-Chul Jang),조준용(Joon-Yong Cho) 한국엔터테인먼트산업학회 2020 한국엔터테인먼트산업학회논문지 Vol.14 No.6
임신 기간 중 임산부는 체중 증가 및 근골격계 변화로 요통과 골반 통증을 유발한다. 필라테스는 유, 무산소성 복합운동으로 자세 교정 및 근 기능을 강화시키는 것으로 보고되고 있다. 따라서 이 연구는 필라테스 매트 운동이 임산부의 신체구성, 요부근력, 요통 및 임신 스트레스에 미치는 영향을 규명하는데 목적이 있다. 본 연구를 수행하기 위해 임신 중기(16~25주) 임산부 19명을 대상으로 필라테스 매트 운동 실험집단(n=11)과 비교집단(n=8)으로 구분하였으며, 실험집단은 하루 60분, 주 2회 12주간 필라테스 매트 운동을 실시하였다. 신체구성 중 체수분량, 체지방량, 체질량지수, 체지방률 및 기초대사량에는 집단 간 변화가 없는 것으로 나타난 반면 실험집단에서는 골격근량에서 유의한 증가가 나타났다. 또한 요부근력의 경우 엉덩이관절 신전근과 요추 신전 가동범위는 필라테스 매트 운동을 수행한 집단에서 유의하게 증가하였다. 요통 수준과 임신 스트레스 수준을 분석한 결과 집단 간 차이는 없는 것으로 나타났다. 따라서 필라테스 매트 운동은 임산부의 근육량을 증가시키고, 요부근력에는 긍정적인 영향을 나타내어 임산부에게 안전하게 적용할 수 있는 운동이라고 할 수 있다. This study is to identify the effects of pilates mat exercise on the body composition, lumbar muscle strength, low back pain and pregnancy stress in pregnant women. In order to carry out this study, nineteen pregnant women were divided into two groups: pilates mat exercise group (n=11) and control group (n=8). EXE group performed pilates mat exercise for 60 min per day, 2days/week for 12 weeks. Our results showed that there was no significant changes in total body water, body fat mass, BMI, body fat percent, and BMR, but the EXE group showed significant increase in skeletal muscle mass. Furthermore, EXE group was significantly increased in hip extension and lumbar extension ROM. Analysis of low back pain and pregnancy stress level showed no significant difference between group. In conclusion, our study suggest that pilates mat exercise can be safely applied to pregnant women by increasing the muscle mass of pregnant women and by showing a positive effect on the lumbar muscle strength.
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멀티미디어 서비스를 위한 VP망의 다중화 이득에 관한 연구
장용철,오무송 조선대학교 동력자원연구소 1995 動力資源硏究所誌 Vol.17 No.2
The ATM(asynchronous transfer mode) has the suitable solution method and the characteristics of multiplexing in the multimedia services. This paper discuss network requirements using the concepts of the multimedia communication in platform label of the multimedia tele-service and module standard. In this paper, We presents to construct structure of ATM switching for management VP(virtual path) based on ATM in the B-ISDN and compute statical multiplexing gain in the ATM-VP network on the integrate network function. Therefore We indicated that our study is effective to multimedia system in the using VP-network as ATM techniques.
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