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원위 경골 골절 치료에서 최소 침습적 금속판과 골수강내 금속정 고정술의 비교
이호민 ( Ho-min Lee ),김영성 ( Young-sung Kim ),김종필 ( Jong-pil Kim ),정필현 ( Phil-hyun Chung ),강석 ( Suk Kang ),조광석 ( Kaung Suk Jo ) 대한골절학회 2018 대한골절학회지 Vol.31 No.3
목적: 본 연구는 원위 경골 골절 환자에서 관절면을 침범하지 않은 군과 단순 침범한 군에 따라 최소 침습적 금속판 고정술과 골수강내 금속정 고정술의 방사선적, 임상적 결과를 비교 하였다. 대상 및 방법: 원위 경골 골절 환자 중 1년 이상 추시가 가능했던 총 50예를 대상으로 하였다. 최소 침습적 금속판 고정술 19예를 A군으로, 골수강내 금속정 고정술 31예를 B군으로 분류하였다. 각 군의 방사선적, 임상적 결과를 분석하였다. 결과: A군과 B군의 수술시간은 평균 72.4분, 65.7분, 골유합시기는 평균 16.4주, 15.7주, 골유합률은 100%, 93%였다. 최종추시에서 관절 운동 범위는 차이가 없었고, 평균 American Orthopaedic Foot and Ankle Society 점수도 A군 90.1점, B군 90.5점으로 차이가 없었다. 관절면의 침범 유무에 따라서도 방사선적, 임상적으로 통계적으로 의미 있는 차이는 없었다. 5도 이상의 부정유합은 A군에서 후방 각형성 2예, B군에서 외반 변형 5예, 불유합은 B군에서 2예 있었다. 결론: 원위 경골 골절의 AO 분류상 관절면을 침범하지 않은 A형 및 단순 침범한 C1, C2형 골절에서 최소 침습적 금속판 고정술과 골수강내 금속정 고정술 모두 우수한 결과를 보였다. Purpose: This study compared the radiological and clinical results of minimally invasive plate osteosynthesis (MIPO) and intramedullary nailing (IMN) of distal tibial fractures, which were classified as the simple intra-articular group and extra-articular group. Materials and Methods: Fifty patients with distal tibial fractures, who could be followed-up more than 12 months, were evaluated. Group A consisted of 19 patients treated with MIPO and group B consisted of 31 patients treated with IMN. The results of each group were analyzed by radiological and clinical assessments. Results: The mean operation times in groups A and B were 72.4 minutes and 65.7 minutes, respectively. The mean bone union times in groups A and B were 16.4 weeks and 15.7 weeks, respectively. The bone union rate in groups A and B were 100% and 93%, respectively. The ranges of ankle motion were similar in the two groups at the last follow-up. The mean American Orthopaedic Foot and Ankle Society score was similar: 90.1 in group A and 90.5 in group B. The radiological and clinical results were similar in the intra and extra-articular groups. In groups A and B, two cases of posterior angulation and five cases of valgus deformity of more than 5o were encountered. Conclusion: Both MIPO and IMN achieved satisfactory results in extra-articular AO type A and simple articular extension type C1 and C2 distal tibia fractures.
비정형 건축물에서 고도화된 인간행동 시뮬레이션을 위한 In-Group Bias 현상의 재현에 관한 연구
조호민(Ho-Min Jo),장현서(Hyun-Seo Jang),김수진(Su-Jin Kim),김홍중(Hong-Jung Kim),이윤길(Yun-Gil Lee) 호서대학교 공업기술연구소 2021 공업기술연구 논문집 Vol.40 No.1
비정형 물리 공간을 기반으로 사회적인 상호작용이 어떻게 재현될지 예측하기는 쉽지 않다. 더구나 설계 단계에서 In-Group Bias 현상을 기반으로 한 사회적 상호작용을 예측하여 디자인을 진행할 수 있도록 지원하는 기술은 찾아보기 어렵다. 본 연구는 비정형 건축물에서 고도화된 인간행동 시뮬레이션을 실현하기 위하여 사회적인 상호작용의 하나인 In-Group Bias 현상을 재현하는 기술개발을 목표로 하고 있다. 이미 개발된 비정형 건축공간에서 사용자 행동 시뮬레이션 도구인 ActoViz를 기반으로 In-Group Bias 현상을 재현하는 에이전트 프로토타입을 통하여 사회적인 상호작용 기반의 고도화된 시뮬레이션 기술의 가능성을 검토하여 보았다. It is not easy to predict how social interactions will be reproduced based on an atypical physical space. This study aims to develop a technology that reproduces the phenomenon of In-Group Bias, one of social interactions, in order to realize advanced human behavior simulation in atypical buildings. Through the agent prototype that reproduces the In-Group Bias phenomenon based on ActoViz, which is a user behavior simulation tool in the already developed atypical architectural space, the possibility of advanced simulation technology based on social interaction was examined.
관절경을 이용한 반월상 연골 부분 절제술 후발생한 치명적 폐색전증
이호민 ( Ho Min Lee ),박정민 ( Jeong Min Park ),안지현 ( Ji Hyun Ahn ) 대한슬관절학회 2010 대한슬관절학회지 Vol.22 No.4
Pulmonary embolism is a serious and fatal complication in orthopedic surgery. Most cases of pulmonary embolism in knee surgery have been reported after knee arthroplasty, but this is rare after arthroscopy. We describe here a case of fatal pulmonary embolism after arthroscopic partial meniscectomy in a female patient who was without any remarkable risk factors.
이호민,최태호,박정주,배철호,Lee, Ho-Min,Choi, Tae-Ho,Park, Jeong-Joo,Bae, Cheol-Ho 대한상하수도학회 2022 상하수도학회지 Vol.36 No.5
In this study, we collect water control valves that have had accidents due to existing cracks, etc. are collected, and propose investigation items for strengthening the valve structural safety evaluation through a series of analyzes from valve specifications to physicochemical properties are proposed. The results of this study are as follows. First, there was a large variation in the thickness of the body or flange of the valves to be investigated, which is considered to be very important factor, because it may affect the safety of the valve body against internal pressure and the flange connected with the bolt nut. Second, 60% of the valves under investigation had many voids in the valve body and flange, etc. and the decrease in thickness due to corrosion was relatively large on the inner surface in contact with water rather than the outer surface. It is judged that the investigation of depth included voids is very important factor. Third, all valves to be investigated are made of gray cast iron foam, and therefore it is judged that there is no major problem in chemical composition. It is judged that the chemical composition should be investigated. Fourth, as a physical investigation item, the analysis of metal morphology structure seems to be a very important factor for nodular cast iron from rather than a gray cast iron foam water valve with a flake structure. As it was found to be 46.7~68.8% of the standard recommended by KS, it could have a direct effect on damage such as cracks, and therefore it is judged that the evaluation of tensile strength is very important in evaluating the safety of the valve.
유한수원을 고려한 Advanced-Pressure Driven Analysis 모형의 개발 및 적용
이호민(Lee Ho Min),전환돈(Jun Hwandon),백승철(Baek Seung Cheol),김중훈(Kim Joong Hoon) 한국방재학회 2018 한국방재학회논문집 Vol.18 No.2
상수도 관망해석 모형은 크게 두 가지로 구분되며, 주로 정상상황의 시스템 해석에 적용되는 Demand Driven Analysis (DDA)와, 수압이 저하되는 비정상상황 해석에 적용되는 Pressure Driven Analysis (PDA)가 있다. 하지만 DDA와 PDA의 경우, 수원이 무한한 용량을 갖는다는 가정을 포함하므로, 수원의 저류량 변화에 따른 영향을 고려하지 못하는 단점이 있다. 따라서 본 연구에서는 유한수원 개념을 도입한 Advanced-Pressure Driven Analysis (A-PDA) 기법을 제안하였으며, 가상의 상수도 관망의 해석에 적용하여 그 적합성을 검증하였다. 적용 결과 본 연구에서 제안된 A-PDA는, 수원의 시간에 따른 저류량 변화를 효과적으로 반영하여 보다 신뢰도 높은 시간 및 공간적 공급량을 산정할 수 있는 것으로 나타났다. Hydraulic analysis model of water distribution systems can be divided into two types, one is Demand Driven Analysis (DDA) which applies to a normal condition, and the other is Pressure Driven Analysis (PDA) for abnormal condition modeling with pressure deficiency. However, both of hydraulic analysis models, the storage capacity of water source is assumed as infinite, and therefore, the effect by water storage variation of source is not considered. In this study an Advanced-Pressure Driven Analysis (A-PDA) with limited reservoir concept is proposed, and it applies to hydraulic analysis of hypothetical water distribution system for verification of proposed method. The results show that, the A-PDA can effectively consider the water source storage variation over time, and it can calculate more reliable temporal and spatial water supply.