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고덕환(Duk Hwan Kho),김동헌(Dong Heon Kim),김규현(Kyu Hyun Kim),이혁준(Hyuck Jun Lee),정재경(Jae Kyoung Jung) 대한슬관절학회 2002 대한슬관절학회지 Vol.14 No.1
Purpose: To evaluate the changes of clinical findings depending on the duration after total knee arthroplasty with or without patellar resurfacing. Materials and Methods: Retrospective study of 145 total knee arthroplasties with (70 cases) or with-out (75 cases) patellar resurfacing was carried out clinically and radioilogically. Patients were evaluated using the knee society score, and the patellar score. Results: No significant difference was found between patellar resurfacing and non-resurfacing knees regarding the knee society score, and the patellar score. The postoperative clinical scores, the postoperative development of anterior knee pain were not influenced by the presence of preoperative anterior knee pain, obesity, the grade of chondromalacia observed intraoperatively, preoperative anteroposterior alignment, or preoperative Insall-Salvati ratio. Conclusion: There was no specific difference between the two groups regarding clinical findings, so patellar non-resurfacing should be considered in patients who have relatively normal articular cartilage and patellofemoral joint space width.
항공 통신 기술 분야 : 다종 무선망 환경에서 스케일러블 비디오 스트리밍 서비스를 위한 체감품질기반의 망 선택 알고리즘 방법
손정현 ( Jung Hyun Son ),서덕영 ( Doug Young Suh ),석주명 ( Joo Myoung Seok ),김규현 ( Kyu Heon Kim ) 한국항행학회 2011 韓國航行學會論文誌 Vol.15 No.1
다수의 이종 무선망들 중에서 스케일러블 비디오 스트리밍 서비스에 적합한 망을 선택하는 경우, 기존에는 망 품질만을 고려하였다. 그러나 사용자 중심의 체감품질을 고려하지 않고 망 선택을 함에 따라 서비스에 대한 체감 만족이 낮아지는 문제가 있다. 이에 따라, 본 논문에서는 스케일러블 비디오 스트리밍 서비스를 위해 망의 품질뿐만 아니라 일반 사용자, 가격민감 사용자, 품질민감 사용자로 사용자의 소비성향을 구분하고 비디오 품질열화에 대한 서비스 가격 만족도 등을 고려한 체감품질기반의 망 선택 알고리즘을 제안한다. 실험결과 일반 사용자보다 가격민감 사용자와 품질민감 사용자는 각각 36%, 9% 정도 체감만족 향상을 갖는 망을 선택할 수 있었다. Most previous work on network selection in heterogeneous wireless networks has concentrated on the quality of the network alone. Therefore, users are not satisfied with network quality based network selection due to different user preferences. To solve this problem, we proposes a QoE-aware network selection algorithm that is based on the consumption patterns of user preferences which is divided into normal user, cost-sensitive user, quality-sensitive user and video quality as well as network quality. As a result of experiments, cost-sensitive user and quality-sensitive user are satisfied with enhanced QoE by 36% and 3% from the proposed network selection algorithm compared to the normal user, respectively.
대퇴골 전자간 골절을 동반한 고령의 환자에서 시행한 슬관절 전치환술
고덕환,김동헌,김규현,신주용,양준호 건국대학교 의과학연구소 2001 건국의과학학술지 Vol.11 No.-
Purpose: To analyze the clinical results of total knee arthroplasty In elderly patients who had arthritic knees and intertrochanteric fractures. Materials and Methods: From fan 1992 to March 1999, 27 cases of the patients with arthritic knees and associated intertrochanteric fractures were treated by total knee arthroplasties and we evaluated the patients by Knee Score of American Knee Society. Results: Flexion contracture was improved from 10.3 degree to 5.2 degree, KSS score was improved from 57.4 points to 78.6 points, authors' evaluation system score was improved from 50.3 points to 73.2 points. Conclusion: In elderly patients with arthritic knees and associated intertrochanteric fractures, total knee arthroplasty seemed to decrease the rehabilitation time and allow earl weight bearing, so provide an improvement in quality of life.