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이계영,임재걸,장익현,Lee, Gye-Young,Yim, Jae-Geol,Jang, Ik-Hyeon 한국정보처리학회 2005 정보처리학회논문지 C : 정보통신,정보보안 Vol.12 No.4
ECN is accurate in determining traffic congestion since it explicitly notifies the incipient congestion. Therefore, ECN method has been thoroughly studied in the field of wireless TCP. This paper introduces a formula to find the optimal threshold for ECN marking. We have implemented a Petri net model of 'TCP with ECN strategy' and performed simulations on it in order to verify the validity of the formula. We have also introduced ideas of applying the formula in practice. The primary contribution of this paper is proposing a formula to find the optimal threshold for ECN marking. However, introducing the Petri net model of 'TCP with ECN strategy' is no less valuable contribution because it can be helpfully used by the researchers in studying network protocols. We have built the Petri net model by modifying the existing Petri net model of TCP. In order to add ECN strategy to the existing model, we have mainly modified the network part. We have also modified sender part and receiver part as well. ECN 방법은 통신 혼잡 발생 초기에 이 사실을 명백히 알려주기 때문에 통신 혼잡을 판단하는 정확한 방법이다. 그래서, 무선 TCP 분야에서는 ECN 방법이 심도 있게 연구되고 있다. 본 논문은 ECN 마킹을 위한 최적의 임계치(threshold)를 찾는 계산식을 제시하고, ECN 전략을 적용하는 TCP의 페트리 넷 모형을 구축한 다음, 시뮬레이션을 통하여 제시된 식의 타당성을 검증한다. 또한, 제시된 식의 실용화 방안도 제안한다. 본 논문의 주된 공헌은 ECN 마킹을 위한 최적의 임계치를 찾는 공식을 제공하는 것이지만, 본 논문에 소개된 ECN 전략을 적용한 TCP의 페트리 넷 모형도 네트워크 프로토콜을 연구하는 학자에게 도움을 주리라고 믿는다. 소개된 페트리 넷 모형은 기존의 TCP 모형에 ECN 전략을 추가하기 위하여 네트워크 부분을 주로 변형하였으며, 송신자와 수신자도 역시 변형되었다.
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김우식,염경호,이계영 연세대학교 산업기술연구소 1986 논문집 Vol.18 No.1
A Study on the extraction of uranium(VI) was perfomed through an immobilized liquid membrane containing D₂EHPA carrier. Hydrogen ion concentration was the most predominant factor in the extraction of uranium(VI) and the extraction efficiency reached the maximum value when pH's of the feed and product solution were 2.5 and 1.0 respectively. Another operation conditions were feed and carrier concentration. The flux was reached a limiting value at feed uranium(VI) concentrations higher than 200mg/ℓand was decreased with more 15 vol% carrier concentration.
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이계영,김성수 대한스포츠의학회 1995 대한스포츠의학회지 Vol.13 No.1
The objective of present study was evaluate the influence of physical activity on bone mineral density in young men. Included in the study were 21 athletes who participated in a full-scale physical exercise program. The control group consisted of 7 healthy men of the same age distribution. The athletes were classified into three categories; baseball players, gymnastic players, swimmers. On the basis of the results of Dual Energy X-ray Absorptiometry, bone mineral content of each body region, total bone calcium content and bone mineral density were analyzed. The results statistically analyzed on these data were summarized as follows; 1. Arms and spine ribs bone mineral density in gymnastic players were significantly higher that in baseball players, swimmers and non-athletes. 2. Legs and pelvis bone mineral density in baseball players were significantly higher than in non-athletes. 3. Lumbar and total bone mineral density in gymnastic players, baseballplayers were significantly higher that in non-athletes. 4. Legs, ribs, pelvis, spine, lumbar and total bone mineral density in swimmers showed no significant difference from non-athletes.
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한글 발음 교육 Web 사이트 설계 및 구현에 관한 연구
이계영,임재걸 東國大學校 2000 東國論叢 Vol.39 No.-
We have designed and implemented a World Wide Web site which teaches pronunciation of Korean Language. There are many web sites of teaching Korean Language but none of them teaches pronunciation. That is because mapping Korean written language into voice language is very difficult. We have built a Korean voice value look-up table by representing Korean Pronunciation Rules in a table. Using this, our site finds correct voice value of written Korean language and shows how to pronounce it. This paper introduces how we built the look-up table, and how we designed and implemented the site.
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이계영,한재덕 천안대학교 2001 천안외국어대학논문집 Vol.- No.1
This study is executed with explanatory method research and analysis about documents. It is no doubt that every study should do as it but this study an-alyzed the content on the whole research of documents, and especially, it more considered the aspect of qhole society than aspect of individuality.It is suggested that specific problem and the background of this study, and mentioned about limitation qhich has appeared in research.It is mentioned about understanding of the traditional culture and relation bet-ween leisure and traditional culture with general contemplation on the leisure theory.
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이계영 동국대학교 경주대학 1994 東國論集 Vol.13 No.-
This research proposed an extended rule for the phenomenon of the Korean vocal sound change. And the study defined a rule on the phenomenon of vocal sound change as the rule-base with end-consonents, based on the Hangeul spelling and the rule of standard pronounciation. It also extended and redefined the rule on the phenomenon of vocal sound change, adding up the annexing phenomenon of undefined compound word and derivative. The result of this study shows that it is useful to create the date base with phoetic value for the Korean voice processing by syllable unit through the implementation system of Korean vocal sound change.
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李啓英,金慶容 중앙대학교 스포츠과학연구소 1994 體育硏究 Vol.- No.7
philosophy is the basis of all kinds of learning, for it has been studied human mind and body systematically. Besides, many of philosophers recognize the fact that physical education plays an important part in physical and spiritual pleasures of human beings. Accordingly, the purpose of this sudy is to investigate an influence philosophy on physical education. The summary of this thesis is following. 1. Naturalism insisted that man should be brought up naturally. Therefore, physical education promotes man's mental and physical health. It means that human beings find happiness through physical education. 2. Idealism insisted that physical education should be center of ideology in order to make human beings creative, fair and just. 3. Realism insisted that physmcal education should develop not only art of war and adaptation of life in society but also human mind, body and moralities. 4. Practiaclism insisted that experience-centered physical education should persue mental, physical and moral growth. 5. Existencealism insisted that physical education should establish its own subjecthood and right value system in order to make program in the need and interest of individuals.
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