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유근식,윤태현,최승효 대한이비인후과학회 2002 대한이비인후과학회지 두경부외과학 Vol.45 No.11
Background and Objectives:Stapedial fixation is most comonly found in congenital anomaly of middle ear. Congenital middle ear anomaly without anomaly of the auricle and inner ear is rare. The surgery of stapedial fixation has evolved during the last 50 years from total to partial stapedectomy, and finally to stapedotomy. Stapedotomy is les likely to induce iatrogenic inner increasing tendency to be replaced by stapedotomy. This study was carried out to analyse clinical features of stapedial fixation and evaluate the degre of the auditory improvement, and also to analyse the factors affecting the results after stapedotomy. Materials and Method:From Jan. 1992 to Aug. 2001, we analysed 25 cases (23 patients) of stapedotomy operated by one surgeon for stapedial fixation at Asan Medical Center. The clinical features, preoperative and postoperative audiologic findings, Results:Preoperative mean bone and air conduction thresholds were 26.5 dB, 64.0 dB, respectively and mean air-bone gap was 36.5 dB. After stapedotomy, mean bone and air conduction thresholds were 24.9 dB, 37.0 dB, respectively at the last audiologic follow-up. In one case, sensorineural hearing loss was observed. There were no significant differences of results asociated with bilaterality, length of piston wire and con-commitent other ossicular anomaly. Conclusion:for carefulnes and meticulousness because of complication. There may need various operative trials and larger scale studies to study about factors affecting the results after stapedotomy.(Korean J Otolaryngol 2002 ;45 :1046-51)
Filteraton 位相空間에서의 거리화와 완비성에 관하여
유근식,현진오 제주대학교 1982 논문집 Vol.14 No.-
In this paper,we treat to the problem of metrization for filteration topology and find to the condition for the completion of the filteration topology.
유근식 ( Geun Sik Yoo ) 대한범죄학회 2015 한국범죄학 Vol.9 No.1
This paper analyzes increasing crime rates of middle-aged people, a strange phenomenon that occurred in Korea. In criminology, it is generally known that the age distribution of crime peaks in the ages of late 10``s and early 20``s. In case of Korea, however, the peak has been moving to the right since early 1990``s and is now formed in 40``s. By using Cohort Analysis Method to derive net effects of cohorts, ages, and periods, this paper shows that the main cause of the phenomenon is cohort effects: some cohorts have higher crime rates and do not correspond with the baby boomer generation. Also, this result indicates that period effects have much less influences on crimes of middle-aged people. To find out what made these cohorts have higher crime rates, I implemented cause analysis, and it turned out that their exposure to drastic changes in Korea society in their early 20``s, made the cohorts commit more crimes. For more accurate analysis, applied method of cohort analysis from Deaton(1997) and Mason et al.(1973) was used with the raw data of Analytical Report on Crime annually published by Supreme Public Prosecutor``s Office of Korea.
VOD 시스템에서 효율적인 영화할당을 위한 버퍼관리 알고리즘의 연구
유근식(Kun-Sik You),최수영(Su-Young Choi),윤남균(Nam-Kyun Yun),구용완(Young-Wan Koo) 한국정보과학회 1999 한국정보과학회 학술발표논문집 Vol.26 No.2Ⅲ
주문형 비디오 시스템의 비용과 성능에 실제 영향을 미칠 수 있는 주요 설계 문제로서 실시간 디스크 스케쥴링, 버퍼 관리, 프리페칭, 영화 할당, 그리고 장치 대역폭 감소등이 있다. 여기서 영화 할당은 영화 사본의 개수를 결정하고, 그리고 서버들에게 영화 사본들이 배치될 위치를 결정한다. 본 논문에서는, 인기도를 고려해서 영화 사본들의 개수를 결정하는 알고리즘과 영화 사본들이 디스크에 배치될 때 topic별로 분리해서 각각의 topic들을 서로 다른 서버에 배치시키는 알고리즘을 제안한다. 그리고 본 논문에서는 각 서버에 한 개의 영화를 저장할 수 있는 버퍼를 두어 가장 인기있는 비디오만 버퍼를 사용하는 버퍼관리 알고리즘을 제안한다.