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Matti-Russe 술식과 Fisk-Fernandez 술식을 이용한 주상골 불유합 치료에 관한 비교 연구
이승환(Seung Hwan Rhee),정문상(Moon Sang Chung),이영호(Young Ho Lee),공현식(Hyun Sik Gong),김지영(Ji Yeong Kim),김민범(Min Boem Kim),오원석(Won Seok Oh),전숙하(Suk Ha Jeon),김정환(Jeong Hwan Kim),백구현(Goo Hyun Baek) 대한정형외과학회 2008 대한정형외과학회지 Vol.43 No.6
목적: 확정형 주상골 불유합에 대하여 적절한 치료를 시행하지 않는 경우 수근골 불안정 및 골관절염의 진행을 피할 수 없는 것으로 알려져 있다. 본 연구에서는 Matti-Russe 술식과 Fisk-Fernandez 술식을 이용한 골유합술의 임상적 및 방사선학적 결과에 대해 비교, 고찰하고자 한다. 대상 및 방법: 2001년 9월부터 2006년 8월까지 본 병원에서 시행한 주상골 골유합술 증례 중 인터뷰에 응한 21례를 대상으로 하였고 평균 추시기간은 31개월이었다. 임상적 평가로는 관절운동범위, 파악력, 환자만족도, 동통 수준을 설문조사하고, 방사선학적 평가로는 골유합, 무혈성괴사, 골관절염 및 DISI 여부를 평가하였다. 또한, 두 수술군 사이에 결과의 차이가 있는지를 비교하였다. 결과: 두 수술군 사이에 동통이나 만족도의 유의한 차이는 없었다, 관절운동범위, 파악력 모두 건측에 비하여 감소한 소견을 보였으나 역시 두 수술군 사이에는 유의한 차이가 없었다. 두 수술군의 골유합률 및 수술 전후 DISI 교정각 사이에도 유의한 차이는 없었고 술 전 관찰된 DISI는 술 후 모두 교정된 소견을 보였다. 골관절염의 경우 전체적으로 7예에서 관찰되었는데, 그 중 술 전에 없던 골관절염이 새롭게 나타난 경우가 1예 있었다. 결론: 두 수술군 사이에 임상적, 방사선학적 평가에 있어서 통계적으로 유의한 차이를 보이지 않으며, 두 술식 모두 골유합과 기능적 회복에 있어서 효과적인 방법이다. Purpose: Established scaphoid nonunion may lead to carpal instability and osteoarthritis. The purpose of this study is to compare the clinical and radiological results of the osteosynthesis between Matti-Russe group and Fisk-Fernandez group. Materials and Methods: Our retrospective study included 21 nonunion cases in 20 patients treated by Matti-Russe or Fisk-Fernandez technique from September 2001 to August 2006. The mean duration of follow up was 31 months. Based on the questionnaire which included clinical information and the radiologic evaluation, we compared the objective and subjective results between two surgical groups. Results: There were no significant differences between two groups in respect of the postoperative satisfaction and the pain. Both the range of motion and the grip power decreased compared to that of the unaffected side, but there were no significant differences between two groups. Also, there were no significant differences in the union rate and the rate of successful correction of DISI deformity. In all cases in which DISI deformity was detected preoperatively, the deformity was corrected postoperatively. There were 7 cases of osteoarthritis, but among them only one case appeared newly after the surgery. Conclusion: There were no significant differences between two surgical groups in clinical and radiological results. Both techniques were effective in achieving bony union and functional recovery.
( Ji Hyun Song ),( Hwan Sik Yoon ),( Byung Hoon Min ),( Jun Haeng Lee ),( Young Ho Kim ),( Dong Kyung Chang ),( Hee Jung Son ),( Poong Lyul Rhee ),( Jong Chul Rhee ),( Jae J. Kim ) 대한내과학회 2010 The Korean Journal of Internal Medicine Vol.25 No.1
Background/Aims: Only a few reports have examined informed consent for gastrointestinal endoscopy in Korea. The aim of this study was to evaluate the appropriateness of the informed consent procedure in Korea. Methods: A total of 209 patients who underwent endoscopy were asked to answer a self-administered structured questionnaire on the informed consent procedure for gastrointestinal endoscopy. Results: One hundred thirteen patients completed questionnaires and were enrolled. In the survey, 91.2% answered that they understood the procedure, and the degree of understanding decreased with age; 85.8% were informed of the risks of the procedure, and the proportion was higher for inpatients and for those receiving therapeutic endoscopy or endoscopic retrograde cholangiopancreatography; 60.2% were informed of alternative methods, and the proportion was higher in older patients; 76.1% had the opportunity to ask questions during the informed consent procedure, and the proportion was higher in inpatients. The understanding of the risks of the endoscopic procedure was better in the younger and more highly educated groups. About 80% had sedation before endoscopy, and only 56% were informed of the risks of sedation during endoscopy. Conclusions: The current informed consent process may be reasonably acceptable and understandable to the patients. However, the understanding of the risks of endoscopy was insufficient especially in the cases of older, poorly educated patients and outpatients. The information about alternatives, the opportunity to ask for additional information, and the information about the risks of sedation during endoscopy were also insufficient in the current consent process. (Korean J Intern Med 2010;25:36-43)
Power and cost reduction by hybrid optical packet switching with shared memory buffering
Rhee, J.-K K,Chan-Kyun Lee,Ji-Hwan Kim,Yong-Hyub Won,Jin Seek Choi,JungYul Choi Institute of Electrical and Electronics Engineers 2011 IEEE communications magazine Vol.49 No.5
<P>The power consumption of a network becomes a critical performance metric for a petabit-per-second scale Internet, in addition to the system cost. We investigate the power and cost efficiency of all-optical and electrical technologies to understand the design principle for petabit-scale hybrid optical switch nodes for optical packet and burst switching. In order to achieve an efficient hybrid design, we point out the interesting observation that the use of long packets switched by passive-medium photonic switches can substantially reduce power consumption and system cost. For contention resolution, shared electronic memory buffers are more effective and power efficient than fiber delay line buffers. An empirical optimization exhibits that a traditional all-optical solution is not the best choice for power and cost efficiency. Using passive-medium photonic switches with electronic memory buffers, we can introduce a substantial savings in power and cost, approximately half of those of commercially available optical cross-connect systems, with a packet loss rate as low as 10<SUP>-</SUP>6.</P>
하이브리드 검출기법을 이용한 교양비디오의 장면 전환 검출
이지현 ( Ji-hyun Lee ),진송철 ( Song-cheol Jin ),문종환 ( Jong-hwan Mun ),이양원 ( Yang-won Rhee ) 한국정보처리학회 2004 한국정보처리학회 학술대회논문집 Vol.11 No.1
기존 장면 전환 검출 방법들은 대부분 특정 영역에 제한되어 사용할 수 있는 방법들이며, 많은 중요한 특징 정보들을 유실하여 장면 전환 검출에 효율적이지 못하였다. 또한 장면 전환 검출을 통하여 의미 정보를 추출하기가 어렵고, 카메라와 객체의 동작을 정확히 인식하지 못하기 때문에 하이브리드 장면전환 검출 기법을 적용하여 의미 있는 정보를 효율적으로 검출 하였다.
이지현 ( Ji-hyun Lee ),문종환 ( Jong-hwan Mun ),진송철 ( Song-cheol Jin ),이양원 ( Yang-won Rhee ) 한국정보처리학회 2004 한국정보처리학회 학술대회논문집 Vol.11 No.1
키 프레임들의 컬러 정보 차이 값과 표준편차 차이 값을 이용한 유사성측정 방법을 기반으로 클러스터링을 이용하여 의미 있는 단위로 분할되어 색인화 된 비디오에서 중요 장면들을 추출하고 추출된 키프레임들을 대상으로 중간(middle)샷 개요 생성 규칙을 적용하여 요약된 형태의 비디오 개요를 추출하여 사용자들에게 제공함으로써 비디오 선택의 폭을 넓힐 수 있도록 제안하였다.