대기시간을 이용한 적응형 멀티미디어 동기화 기법

이기성,이근왕,이종찬,오해석,Lee, Gi-Seong,Lee, Geun-Wang,Lee, Jong-Chan,O, Hae-Seok 한국정보처리학회 2000 정보처리학회논문지 Vol.7 No.2

Real-time application programs have constraints which need to be met between media-data. These constraints represents the delay time ad quality of service between media-data to be presented. In order to efficiently describe the delay time and quality of service, a new synchronization mechanism is needed. Proposed paper is a dynamic synchronization that minimized the effects of adaptive transmission delay time. That is, the method meets the requirements of synchronization between media-dat by handling dynamically the adaptive waiting time resulted from variations of delay time. In addition, the mechanism has interval adjustment using maximum delay jitter time. This paper decreases the data loss resulted from variation of delay time and from loss time of media-data by means of applying delay jitter in order to deal with synchronization interval adjustment. Plus, the mechanism adaptively manages the waiting time of smoothing buffer, which leads to minimize the gap from the variation of delay time. The proposed paper is suitable to the system which requires the guarantee of high quality of service and mechanism improves quality of services such as decrease of loss rate, increase of playout rate.

출판학 연구 동향 및 특성에 관한 논문 - 한국출판학연구(1982~2006)를 중심으로 : 출판학 연구 동향 및 특성에 관한 논문

이기성(Lee Ki-Sung) 한국출판학회 2006 한국출판학연구 Vol.0 No.51

‘출판학 연구 동향 및 특성에 관한 논문―한국출판학연구(1982~2006)를 중심으로’ 연구 논문은 1982년도부터 2006년 6월 통권 제50호까지 한국출판학연구에 실린 272건의 논문을 분석한 것이다. 본 논문은 서론, 선행 연구 검토, 최종 매체별 구분, 출판 분야 및 단계별 구분, 언어 문자별 구분, 필자별 논문 구분, 결론의 7개 내용으로 구성되었다. 출판에 관한 분류 방법에 대하여는 민병덕 교수, 이기성 교수, 남석순 교수, 이종국 교수, 팽건염 교수, 기륜성남 교수 등 여러 학자가 이미 연구한 바 있다. 필자는 매체별 분류, 분야별 분류, 단계별 분류, 언어 문자별 분류의 4가지를 하나의 같은 범주 내에서 구분하는 것이 아니라 각기 다른 위치(차원)에서 구분하는 것이므로 논문이나 출판물은 하나이지만, 이것을 각기 4가지씩으로 분류하는 방법을 2000년도에 제안한 바 있다. 첫 번째 : 최종 매체(media)에 의한 논문 구분(① 종이 매체, ② 전자 매체(비종이 매체), ③ 공용의 3가지), 두 번째 : 분야(field)에 의한 논문 구분(① 교과서류, ② 단행본류, ③ 잡지류, ④ 신문류, ⑤ 일반), 세 번째 : 단계(step)에 의한 논문 구분(① 기획, ② 편집, ③ 제작, ④ 마케팅, ⑤ 총괄), 네 번째 : 언어(language) 문자에 의한 논문 구분(① 한국어, ② 영어, ③ 중국어, ④ 일본어, ⑤ 기타 문자) 결론적으로 첫째, 출판학이나 출판 산업을 분석하려면 2차원 이상으로 분류하는 방법(멀티차원분석법)이 필요하다. 둘째, 제작 단계와 편집 단계의 논문이 매우 필요하다. 셋째, 출판 관련 논문을 작성하는 필자가 절대적으로 부족하다. This study is divided into 7 parts ; Introduction, Classification systems, Classification -based on output media, Classification -based on publication fields and steps, Classification -based on language and letters, Classification -based on authors, and Conclusion. Theses given in the collection of learned papers of Studies of Korean Publishing Science have been issued from 1982 to 2006 are two hundred and seventy two. Many scholars have suggested the way of analyzing the publications and publishing industry. Professor B.D. Min’s method : General remark, Selection, Production, Distribution, Managing, and History. Professor K.S. Lee’s method : Divided with final output Media, Divide with publication Field(contnents), Divided with publication production Step, and Divided with typeset Language and letters. Professor S.S. Nam’s method : Theory of publishing, Education, Production, Circulation, Reception, Environment, Industry, Electronic Publishing, Law, and International Publishing. Professor J.G. Lee’s method : Theory, Copyright/Morals, Editing/Production, Textbook, Book, Magazine, Electronic Publishing, Management/Industry, Circumstances, International Publishing, and Reading/Reader. In this study, I propose the analyzing publications and publishing industry is not only one dimension but also more than two dimensions according to the angles of vision. The first dimension is divided into 3 sections based on output media, such as Paper, Electron(non-paper), and altogether. The second dimension is divided into 5 sections based on publishing field, such as Textbook, Book, Magazine, Newspaper, and General(the others). The third dimension is divided into 5 sections based on production step, such as Planning, Editing, Production, Marketing, and General(basis). The fourth dimension is also divided into 5 sections based on language and letters, such as Korean character, English, Chinese, Japanese, and the others. Multi Dimension Analysis(MDA) which is using more than two dimensions is the most suitable way of analyzing the publications and the theses related to publishing.

우리나라의 우주개발 추진체계 및 현황

이기성,Lee, Ki-Seong 한국기술사회 2008 技術士 Vol.41 No.5

Having regarded space technology as one of national strategic technologies for its national development, the Korean Government legislated "Space Development Promotion Act" in 2005. Based on it, the Korean government established "National Space Committee" and set up "Long-Term Plan for Korea's Space Development". For the fulfillment of those national policies, related organizations including Korea Aerospace Research Institute are developing various satellites, space launch vehicle(KSLV-1), and Naro-space center. etc.

Rhizopus oryzae 의 카드뮴 해독기작과 이에 관련된 동위효소의 변화 양상

이기성,김영호,박영식,박용근 ( Ki Sung Lee,Young Ho Kim,Young Sik Park,Yong Keun Park ) 한국균학회 1995 韓國菌學會誌 Vol.23 No.1

Rhizopus oryzae 의 생리 생화학적 카드뮴 해독기작

이기성,김영호,박영식,박용근 ( Ki Sung Lee,Young Ho Kim,Young Sik Park,Yong Keun Park ) 한국균학회 1995 韓國菌學會誌 Vol.23 No.1

서로 다른 밀도를 갖는 탄소섬유강화 탄화규소 복합재료의 압흔응력에 의한 기계적 거동

이기성,김일겸,김태우,김세영,한인섭,우상국,Lee, Kee-Sung,Kim, Il-Kyum,Kim, Tae-Woo,Kim, Se-Young,Han, In-Sub,Woo, Sang-Kuk 한국세라믹학회 2011 한국세라믹학회지 Vol.48 No.4

In this study, we investigated the mechanical behavior of carbon fiber reinforced silicon carbide composites by indentation stress. Relatively porous and dense fiber reinforced ceramic composites were fabricated by liquid silicon infiltration (LSI) process. Densification of fiber composite was controlled by hardening temperature of preform and consecutive LSI process. Load-displacement curves were obtained during indentation of WC sphere on the carbon fiber reinforced silicon carbide composites. The indentation damages at various loads were observed, and the elastic modulus were predicted from unloading curve of load-displacement curve.

유비쿼터스 시대의 출판문화콘텐츠는 IT기술발전의 견인차 역할

이기성,Lee, Gi-Seong 대한인쇄문화협회 2008 프린팅코리아 Vol.68 No.-

대청호 및 금강수역의 유기물 분해능과 오염의 신호지표

이기성,고동규,박영식,최청일,최영길 ( Ki Sung Lee,Dong Kyu Ko,Young Sik Park,Chung Il Choi,Yong Keel Choi ) 한국환경생물학회 1995 환경생물 : 환경생물학회지 Vol.13 No.1

In order to test the microbiological degradability of organic compounds and self-clarification, cycle of phosphorus compound in Daechung Reservoir Lake and Kum River area, physico-chemical factors and various bacterial population were analyzed. Also exo-enzymes activities, the amount of chlorophyll, polyphosphate, and DNA amount of cells were measured during from April to September in 1993. As a result of physico-chemical factor analysis, self-clarification of Deachung Reservoir Lake on upstream of Kum River was recognized periodically. The community sizes of total heterotrophic bacteria were evenly distributed seasonally. However the community sizes of total heterotrophic bacteria in the middlestream and downstream were distributed higher than those in the upstream of Kum River. Also population densities of indicator microbes for the determination of pollution such as E. coli and antibiotics or heavy metal resistant bacteria were higher in Gapchun stream and the middlestream of Kum River than those in other areas. And the populations of the indicator microbes were tended to increase more during the summer than those in the other season. The various exo-enzymes were mainly contributed to the water environment, so the self-clarification of each sites may be proceeded gradually by the degradation of organic compounds. The amounts of poly-P were relatively high temporally before the blooming of phytoplankton. It was also high in the polluted area that the relative ratios of poly-P to DNA or to chlorophyll can be applied usefully for the biological index checking the unbalanced and eutrophicated state of nutrition in environment.

금강수역내에서 분리된 몇 종의 Ampicillin 내성균의 β-Lactamase 발현양상

이기성,고동규,최원창,문영길,박영식,최청일,최영길 ( Ki Sung Lee,Dong Kyu Ko,Won Chang Choi,Yong Keel Mun,Young Sik Park,Chung Il Choi,Yong Keel Choi ) 한국환경생물학회 1994 환경생물 : 환경생물학회지 Vol.12 No.1

In order to characterize the bacterial β-lactamase types occurred in Kum river area, this research was designed to analyze with identification upon ampicillin (Amp) resistant bacteria, and was investigated into relationships between β-lactamase expression (inducibility) and growth phase under ampicillin shift and with restriction patterns of R-plasmids. As the identification result upon 4 strains of Amp resistant bacteria, KL 601 is identified as Pasteurella maltocida, KL 602 as Enterobacter agglomerans, KL 609 as Pseudomonas maltophilia and KL 611 as Acinetobactor calcoaceticus, respectively. In order to investigate Amp effect upon growth, when the Amp resistant bacteria were cultivated in nutrient liquid LB medium, in LB medium added with Amp, or in LB medium in the manner of Amp shift, the changes in growth rate and lag phase could not be observed. However, upon the prototrophic strains, KL 602 and KL 609, examining Amp effect upon these two strains in minimal GM63 liquid media, even though there was no change of maximum growth yield, the latent lag phase become very lengthened. In nutrient medium, β-lactamase activities of these 4 strains were metabolically regulated in accordance with growth phase, on the other hand, in minimal medium were differently regulated in accordance with growth phase and with strains. It could be postulated that KL 609 strain has the M.W.24,000, β-lactamase type which E. coli comprise, however, that KL 601, KL 602 and KL 611 have the M.W.35,000, β-lactamase type which E. cloacae or C. freundii comprise. Through the whole growth phase, since Amp did not affect to phosholipid metabolism, there is no change in phospholipid compisition upon Amp effect. Main phospholipid are the phosphatidyl glycerol and cardiolipin in all 4 Amp resistant strains. So, it was very significant that there were no changes in phospholipid composition and in growth rate upon nutrient medium under Amp stress. In order to recognize whether Amp resistant strains comprise the plasmid or not, preparation of plasmids and restriction digestion with Bam H1 were carried out, KL 601 strain has about 30 Kb of plasmid, KL 609 and KL 611 strain have about 25 Kb of plasmid and KL 602 does not have the plasmid, however. Hence, it will be predicted strongly that β-lactamase gene in KL 602 might be encoded chromosomally. Moreover, considering the results upon the changes of β-lactamase acticity, upon β-lactamase inducibility and upon changes of periplasmic protein profile under Amp stress, its prediction is very recognizable.

정보문화와 윤리적 과제

이기성,Lee, Gi-Seong 한국정보통신집흥협회 1994 정보화사회 Vol.80 No.-