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김현주,최중용,오아름,지형근,Kim, H.J.,Choi, J.Y.,Oh, A.R.,Jee, H.K. 한국전자통신연구원 2022 전자통신동향분석 Vol.37 No.3
As the COVID-19 pandemic has decreased face-to-face communication in everyday life, our interest in cultural communication via virtual world has grown significantly. In particular, the demand for applications that use three-dimensional (3D) data generation technology such as virtual reality, augmented reality, virtual performances, and realistic content is rapidly increasing in the entertainment and gaming industries. Additionally, improved computing capacity has increased the demand for high-resolution data. This study investigates the trends in 3D scanning and photogrammetry technologies that can support high-quality 3D data generation and introduces the high-resolution 3D data generation technology developed and reported in ETRI.
폐색성 무정자증환자의 치료로써 미세적 부고환 정자흡입술(MESA) 및 정자직접주입법(ICSI)의 효과
김현주,김영찬,엄기붕,오종훈,이우식,한세열,최동희,윤태기,차광열,Kim, H.J.,Kim, Y.C.,Oum, K.B.,Oh, J.H.,Lee, W.S.,Han, S.Y.,Choi, D.H.,Yoon, T.K.,Cha, K.Y. 대한생식의학회 1995 Clinical and Experimental Reproductive Medicine Vol.22 No.2
To present and assess the efficacy of combination of microsurgical epididymal sperm aspiration(MESA) and intracytoplasmic sperm injection(ICSI) for the treatment of infertility due to unreconstructable obstructive azoospermia or congenital bilateral agenesis of vas deferens (CBAVD), MESA was performed in the 45 husbands ( 16 CBAVD, 29 unreconstructable genital tract obstruction), followed by ICSI of oocytes recovered from the wives hyperstimulated by GnRH agonist in combination with hMG and FSH. Cleaving embryos were transfered to the uterine cavity or follopian tube(ZIFT) 18 or 24 hours after ICSI procedure. In 45 cycles of MESA, 492 oocyte complexes were recovered. ICSI was carried out on 355 metaphase II oocytes and 226 oocytes (63.7%) showed normal two pronucleus fertilization. After 198 embryos were transferred in 43 cycles, an average of 5 per cycle, 20 patients presented a positive HCG and intrauterine pregnancy was confirmed by US. So, the clinical ongoing pregnancy rate per transfer was 46.5%. Until now, 8 patients have given birth to 9 babies, 5 male and 4 female, including 1 twin. The babies were all healthy except 1 twin female baby. There was 1 miscarriage at 7 weeks and chromosomal study of abortus revealed as 45X, monosomy. These results suggested that it was possible to achieve high normal fertilization and pregnancy rate by ICSI using epididymal sperm.
김화종(H. J Kim),김현주(H. J. Kim),김성용(S. Y. Kim),송재혁(J. H. Song),한지훈(J. H. Han),이호림(H. L. Lee),김덕환(D. H. Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
현재 전세계적으로 170㎸급 이하의 초고압 지중케이블 접속함으로 기존의 현장몰드방식의 TMJ(Tape Molded Joint)와 부풍조립망식의 PJ(Prefabricated Joint)보다 조립시간이 짧고 작업자의 숙련도가 높지 않아 경제적이며, 유지보수에 장점을 가진 고무몰드 접속함(PMJ)이 채용되고 있으며, 이러한 추세는 적용 전압급이 점차 상승하면서 230㎸급까지 그 비중이 늘어나고 있는 경향을 보이고 있다. 당사에서는 이러한 추세에 발맞추어 154㎸급 고 무몰드접속함의 개발 당시의 Silicone의 기초물성시험 DATA 획득, 고무볼드 UNIT 및 금형 설계 기술 확립과 접속 공법 개발의 경험 을 바탕으로 230㎸급 고무몰드접속함의 개발에 성공하였다.
결함허용 시스템에서의 고속 메모리를 위한 에러검출기의 설계
김현주(H.J.Kim),유충렬(C.Y.You),이광배(K.B.Lee),김현옥(H U Kim) 한국정보과학회 1992 한국정보과학회 학술발표논문집 Vol.19 No.2
본 논문은 결함 허용 컴퓨터 시스템의 주요 부분의 하나인 에러 검출과 수정에 관한 연구의 일부분으로 고속으로 동작하는 메모리의 데이타 입출력에서 에러를 검출하기 위한 에러 검출기를 설계하였다. 에러 검출의 일반적인 특성과 방법들을 고찰한 후 Modified-Hamming Code를 사용한 에러 검출기를 설계하고 결과를 Simulation 하였다.
[디젤엔진] 다공 디젤분무의 액적-공기 유동특성에 관한 실험적 연구
김현주(H.J.Kim),신형민(H.M.Shin),이지근(J.K.Lee),강신재(S.J.Kang),노병준(B.J.Rho) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This experimental study is to investigate the intermittent spray characteristics of a multi-hole nozzle in a heavy-duty DI diesel engine<br/> It has a 2-spring nozzle holder. and its hole number is 5 (dn = O.32mm). By using the 2-D PDPA(phase Doppler particle analyzer). the droplet diameter and velocity of the diesel spray injected intermittently from the multi and single-hole nozzle into the still ambient were measured<br/> To analyze the intermittent characteristics. the time-window of O.15ms were applied to this study. In the spray. the small droplet(D(lO ㎛) was regarded as a air flow. and the intermittent characteristics of the fuel drop]et(lO㎛<D<500㎛ ) and the air flow were examined. The normalized axial droplet-air relative velocity of the 5 hole and the single hole nozzle is 0.13 and 0.113 respectively.
Model Defroster Duct의 유동특성에 관한 실험적 연구
김현주(H.J.Kim),이지근(J.K.Lee),김덕진(D.J.Kim),강신재(S.J.Kang),노병준(B.J.Rho) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
The flow characteristics of the 2-dimensional model defroster duct which simulated defroster duct system inside a vehicle passenger compartment was investigated to obtain the data of the dafroster duct design with nozzle shape and impinging angle etc.. As the results from the experiment. the contraction ratio and shaps of the dafroster nozzle which is one of the most important parameters in the duct design affected the dischargecoefficient of the defroster nozzle. The half-width of the wall jet formed by a impingement of the plane free jet issued from the defroster nozzle on the windshield increased with the dacrease of the impinging angle. And also we could find that there was a reflection point of the momentum distribution with impinging angle near the 60 deg..<br/>