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초고속 무선 멀티미디어(인터넷) 서비스를 위한 밀리미터파 대역 Pico Cell 광무선 통신 기술
김호영,전동석,이상석,남은수,김제하,김해천,조경익,김보우,이우용,Kim, H.Y.,Jeon, D.S.,Lee, S.S.,Nam, E.S.,Kim, J.H.,Kim, H.C.,Cho, K.I.,Kim, B.W.,Lee, W.Y. 한국전자통신연구원 2005 전자통신동향분석 Vol.20 No.6
최근 국내외에서 연구되고 있는 가입자에 초고속 멀티미디어 서비스가 가능하도록pico cell 가입자 통신망을 구성하여 100Mbps-수 Gbps의 대용량 초고속 데이터를 통신할 수 있는 밀리미터파 pico cell 광무선 통신 기술의 개념, 필요성, 기술 동향과ETRI를 중심으로 연구 개발되고 있는 핵심 부품들의 개발 현황과 기술의 활용성에 대하여 조사하였다.
금속폭발억제재가 충진된 LPG 탱크의 비정상 열전달 및 압력변화 해석
김호영,장효환,전철균,Kim H. Y.,Chang H. W.,Chun C. K. 대한설비공학회 1987 설비저널 Vol.16 No.4
As one of the explosion suppression methods of LPG tank exposed to hot environment by an accident or fire, some material which has large heat capacity and thermal conductivity can be installed inside the LPG tank in order to suppress the temperature increasement of tank wall. In the present study, theoretical model for the horizontally locating cylindrical LPG tank with and without the aluminum explosion suppression material has been developed to predict the characteristics of system. As a parametric study, effects of two major parameters, thickness of material filling and initial vapor volume fraction, on the time variation of wall temperature, temperature and pressure in tank are numerically examined. The results of present study show that the thickness of material filling does not give big differences in the suppression characteristics when the thickness of filling is larger than three inches. In case of material filling, there are marked suppression effects to the increase-ment of wall temperature, average vapor temperature and pressure in tank compared with the case of no filling.
한국어 통사 규칙에 바탕을 둔 개선된 챠트 파싱 알고리즘
김호영(H.Y.KIM),최재혁(J.H.CHOI),이상조(S.J.LEE) 한국정보과학회 1990 한국정보과학회 학술발표논문집 Vol.17 No.1
본 논문에서는 자연 언어 처리시 생기는 비결정성 문제를 해결하기 위하여 단일화 문법과 챠트 파싱 방법을 이용하여 형태소 수준의 비결정성은 통사적 정보에 의해 제약하고, 통사적 수준의 비결정성은 의미 해석에서 결정될 수 있게 해석 가능한 모든 트리를 생성할 수 있는 한국어 형태소/구문 해석기를 설계하고 구현하였다.
H. Y. Kim(金晧瑛),S.K. Lee(李壽寬),K. Y. Chang(張權烈) 한국육종학회 1982 한국육종학회지 Vol.14 No.3
It was carried out the genetic study for days to heading and culm length of rice in different environments. The genetic variation of days to heading was higher than that of culm length in proportion with the different environments. Degree of heterosis on days to heading was remarkable in the direction of late exceeding mid-parent and more higher in the field than in the green-house. Heterosis of culm length was remarkable in the direction of tall in all of two different environments. The mean squares of GCA and SCA for days to heading and culm length were significant in all of two different environments. The mean squares of GCA were higher than those of SCA for two characters. In Vr-Wr graph, days to heading was exhibited by partial dominance in the green-house, over dominance in the field. Culm length was exhibited by over dominance in two different environments.