스트립 다운에 의한 엔진 마찰 시험의 문제점

조명래,오대윤,한동철,Cho, Myung-Rae,Oh, Dae-Yoon,Han, Dong-Chul 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.11

The aim of this paper is to investigate the problem of strip down method, which is usually used to evaluate the engine friction level. The validity of strip down method was investigated by theoretical analysis of friction in crank and piston assembly. The friction of cylinder and piston assembly was analyzed under the various test conditions. The measured cylinder pressure was used as boundary conditions of friction torque and loss calculation. The friction loss of crank and piston assembly was influenced by test conditions that resulted from the variation of load condition. From the results, we have known that the strip down method could be possible to distort the friction loss of engine moving components.

피스톤계 마찰 특성 (II) -실험적 연구-

조명래,하경표,김중수,오대윤,한동철,Cho, Myung-Rae,Ha, Kyoung-Pyo,Kim, Joong-Soo,Oh, Dae-Yoon,Han, Dong-Chul 대한기계학회 2003 大韓機械學會論文集A Vol.27 No.1

The aim of this paper is to investigate the friction characteristics of piston assembly, which composed of ring pack and piston skirt. The friction force of piston assembly was measured by using the movable liner in the single cylinder engine, and the various parameters were tested. The friction force was suddenly increased at the expansion stroke due to higher cylinder pressure. The viscous friction was dominant at the mid stroke, but the boundary friction was dominant at the top and bottom dead centers. Through the experiment, we could validate previous theoretical study, and confirm that th e radial clearance and ring tension were very effective to reduce friction loss of piston assembly.

정형외과 수술 후 감염 환자의 균 동정

조명래(Myung Rae Cho),김철(Chul Kim),손정환(Jung Wan Son),김재도(Jae Do Kim) 대한정형외과학회 2003 대한정형외과학회지 Vol.38 No.7

토지공개념의 이상과 현실

조명래(Cho, Myung-Rae) 한국공간환경학회 2005 공간과 사회 Vol.23 No.-

본 논문은 ‘토지공개념’의 역사적 연원, 법리적 원리, 제도로서 운영특성과 그 한계 등을 분석한 뒤, 본래의 취지인 토지의 공공성 구현을 위한 제도로서의 활용을 위한 방향을 제시하는 것을 목적으로 한다. 글의 순서는 우선 토지의 본질적 속성으로 공공성 혹은 사회성의 역사적 기원과 연혁을 살펴보고, 이어 한국에서 토지공개념이 등장하고 제도화하는 과정을 분석한 뒤, 마지막으로 한국에서 토지공개념이 안정적 제도로 구축될 수 없는 요인으로서 입법기술의 문제와 토지공개념과 대비되는 시장주의적 토지관의 영향을 지적하면서, 이 두 전제의 해결을 통해 토지공개념의 새로운 제도화 필요성을 논의하는 순서로 이루어진다. This paper aims at analyzing the historic origin, legal principles and operational characteristics of the public concept of land, with a view to providing new directions for utilization of it as an institutional means of enhancing the publicness of land.The paper begins with examining the historic root and history of a publicness or social nature of land as its intrinsic value and then moves on analyzing the emergence and institutionalization of the public concept of land in Korea, by seeking reasons for why the public concept of land as a policy tool fails in reality. In doing so, the paper tries to offer a new way-out for overcoming the limit of the public concept of land by removing legal hindrances concerning the concept and overcoming a market-friendly approach of the concept.

인공 고관절 치환술에서 대퇴주대 주위의 시멘트 두께 측정

조명래(Myung Rae Cho),박위태(Wee Tae Park),박창민(Chang Min Park),이상욱(Sang Wook Lee),김신근(Shin Kun Kim),권굉우(Koing Woo Kwon) 대한정형외과학회 2006 대한정형외과학회지 Vol.41 No.3

목적: 확강용 기구에 의해 만들어진 가상의 업체 공간 속에서 대퇴주대의 회전에 따른 시멘트의 두께 변화를 측정하였다. 대상 및 방법: C stem과 Versys stem을 사용하였고, 분석은 C250/400VZ (Steinbichler Co., Germany)와 S/W: Geomagic & CATLA V5를 이용하였다. 정중간에 대퇴주대를 정일치 시킨 후 확강용 기구를 이용하여 만들어진 가상의 입체 공간 내에서 실제 대퇴주대를 횡단면과 관상면을 기준으로 회전시켜 회전 변화에 따른 실제 주대의 바깥면과 확강용 기구의 바깥면 사이의 거리를 측정하였다. 결과: C stem은 대퇴주대가 3도 회전할 때에 1 ㎜ 미만으로 감소하였고 Versys stem의 경우는 5도에서 간격이 1 ㎜ 미만으로 감소하였다. 선회축 회전의 경우 C stem은 0.25도 내반된 상태에서 1 ㎜ 미만으로 감소하였고, 내반각이 0.8도에서 접촉하였으며, Versys stem의 경우는 1도에서 접촉하였다. 선회축 회전과 횡단면의 회전이 복합된 경우 전예에서 1 ㎜ 미만으로 나타났다. 결론: 적절한 시멘트 두께의 유지를 위하여 대퇴주대의 정확한 삽입을 위한 기구 개발, 또는 대퇴주대의 회전 변화에 견딜 수 있는 대퇴주대의 모형 변화가 필요할 수 있으리라 판단된다. Purpose: To measure the cement mantle thickness that developed from a rotation of the femoral stem in virtual space made by the broach. Materials and Methods: The C stem and Versys stem of the subjects enrolled in this study were examined. A C250/400VZ(Steinbichler Co. Germany) and S/W: Geomagic & CATIA V5 was used to examine the three-dimensional configurations. The axial images were acquired after neutral placement of the femoral stem, horizontal rotation, coronal tilting, and a combination of both. The thick-ness was measured from the distance between the outer surface of the femoral stem and the closest vertex in the outer contour of the broach in cross-sectional images. Results: The distance was < 1 ㎜ at the horizontal rotation of 3 degrees in the C stem, and at 5 degrees in the Versys stem. The distance was < 1 ㎜ at varus of 0.25 degrees in the C stem, and touched at 0.8 degrees. In the case of the Versys stem, the femoral stem touched at a varus of 1 degree. A combination of both horizontal and pivot rotation made the distance < 1 ㎜ at rotation of all angles. Conclusion: It might be necessary to develop a new instrument for the accurate insertion of the femoral stem along the broached space or to modify the stem design to stand against the change in the femoral stem position in the broached space.

도시산업구조의 변화와 새로운 도시빈곤의 등장

조명래(Myung Rae Cho) 한국도시연구소 1995 도시연구 Vol.- No.1

N/A

NGO 의 입장을 통해 본 영국의 그린벨트 제도 - 개발과 보전의 조화를 위한 제도 -

조명래(Myung Rae Cho) 한국도시연구소 1998 도시연구 Vol.- No.4

N/A

인공 고관절의 발전사

조명래 ( Myung Rae Cho ),장호진 ( Ho Jin Chang ) 대한고관절학회 2013 Hip and Pelvis Vol.25 No.1

Department of Orthopaedic Surgery, Daegu Catholic University Medical Center, Daegu, Korea For several centuries, orthopaedic surgeons have been given the task of managing the pain, limp, and gait disturbance that develop in association with various trauma and diseases of the hip joint. Progress has been made in development of surgical methods for the hip joint, and a recent concept was determined by introduction of the ``Clean Air Operating Enclosure`` system and ``low frictional arthroplasty`` in total hip arthroplasty (THA) by John Charnley, in 1960. THA has been performed as an exclusive method for hip joint reconstruction. We report on understanding of the current status from the past, present, and future trends with an introduction of the prior method of THA and a discussion of the history.

큰 대퇴 골두를 사용한 인공 고관절 전치환술: 초기 합병증에 관한 단기 추시 결과

조명래 ( Myung Rae Cho ),김세식 ( Se Sik Kim ),이현섭 ( Hyun Seop Lee ) 대한고관절학회 2009 Hip and Pelvis Vol.21 No.3

Purpose: This study evaluated the short-term follow-up results after total hip arthroplasty with using a 36 mm large femoral head. Materials and Methods: Between August 2004 and August 2007, 104 patients were treated with total hip arthroplasties using a 36 mm-Cobalt-Chrome femoral head with Longevity (Zimmer, Warsaw, IN) as the polyethylene liner. The average age at the time of the index operation was 61.4 years (range: 23 to 87 years), and the mean follow-up period was 27 months (range: 18 to 46 months). The clinical results and early complications after the operation were analyzed. Results: The Harris Hip Scores were more than `Good` in all cases with an average score of 93, and the Merle d` Aubigne and Postel scores were more than `Good` in 75% of the patients. All the femoral stems that were cemented or cementless had satisfactory fixation. Dislocation developed in one case and only one time, and there were no other complications during the follow-up period Conclusion: Total hip arthroplasty with using a 36 mm large femoral head is a recommendable treatment with a low dislocation rate and high satisfaction, which comes from the lack of restriction of the postoperative hip position and movement.

지역균형발전과 NGO역할의 가능성과 한계

조명래(Cho, Myung-Rae) 한국NGO학회 2005 NGO연구 Vol.3 No.1

참여정부가 추진하는 지역균형발전은 중앙권력을 지방으로 이양하면, 지방은 이양된 권력(자율성)을 바탕으로 지역의 내생적 발전을 역동적으로 추구하는 것을 전제로 한다. 이러한 의미의 지역균형발전은 지역시민사회를 무대로 활동하는 NGO의 매개적, 결연적 역할을 통해 촉진되고 추진되어야 하며, 이를 위한 협치기구가 제도화되어야 한다. 참여정부하의 지역균형발전은 실제 지방분권운동 세력들에 의해 사회운동과제로 제안된 것이 정책으로 선정되고 제도화되는 것이다. 그러나 이는 지역시민사회의 미성숙이란 조건과 함께 NGO의 체제내화를 촉진해 균형발전을 지역의 새로운 개발과 성장으로 전락시키는 결과를 초래하고 있다. Balanced regional development policy adopted under the Nor Government (2002-2006) aims at fostering a dynamic endogenous development based on local autonomy devolved from the central government. This kind balanced regional development should be implemented via an associational and mediatory role of NGOs in a local civil society, for which a governance body is to be instituted. In fact, the Nor Government has adopted balanced regional development by incorporating a NGO agenda for decentralization movement into government policy. But this has led to including NGOs into the governmental realm, thereby degrading balanced development into regional growth.