건축의 경제적 요인과 특성에 관한 연구

이동헌,Lee Dong Heon 한국주거학회 2005 한국주거학회 논문집 Vol.16 No.2

Korea has recently experienced a large change in civil architecture and urban environment. However most of civil architectures and urbanization have been accomplished without considering economic efficiency and impact. This study focuses primarily on an analysis on the relationship between architecture and economic efficiency through the foreign and domestic case studies. Secondly, it is going to elucidate the economic properties on Korean architecture recently established. With perspectives of the analysis, we need to consider the following factors in the production of architecture; labor intensive industry, seasonal industry, strong and domestic demand.

개복하 부신 절제술 경험이 없는 단일 술자에서 시행된 복강경하 부신 절제술의 학습곡선 및 초기 임상 경험 분석

이동헌,최유신,박성준,Dong Heon Lee,Yoo Shin Choi,Sung Jun Park 대한갑상선-내분비외과학회 2013 The Koreran journal of Endocrine Surgery Vol.13 No.4

Purpose: Adrenalectomy is a very rare operation and its associated learning curve has not yet been studied. The objective of this study was to determine whether the operation time decreases with experience and to evaluate the safety and feasibility of laparoscopic adrenalectomy performed by a surgeon who is new to laparoscopic and open-surgical adrenalectomy. Methods: This study is a retrospective analysis of laparoscopic adrenalectomies performed between April 2007 and September 2012. All surgeries were performed by a single young surgeon who had no experience in performance of open or laparoscopic adrenalectomy. All surgeries were performed using the transperitoneal approach. Results: In total, 42 cases were included. The average tumor size was 4.7 cm. The mean operating time was 125 min. Mean duration of hospital stay was 8.7 days. None of the cases showed conversion to open surgery or perioperative mortality. The operator achieved mastery after performance of left laparoscopic adrenalectomy in 12 cases and right laparoscopic adrenalectomy in 11 cases. Conclusions: A new surgeon can perform laparoscopic transperitoneal adrenalectomy successfully, independently, and safely after having performed the surgery in 12 cases.

회원칼럼-지진대비책 마련 시급하다

이동헌,Lee, Dong-Heon 한국건축구조기술사회 2005 건축구조 Vol.12 No.3

L-Methionine Ethyl Ester 유도체의 구리 이가 착물 합성 및 구조 분석

이동헌,Dong-Heon Lee 대한화학회 2003 대한화학회지 Vol.47 No.4

K평균 군집화를 이용한 벡터 데이터 압축 방법

이동헌,전우제,박수홍,Lee, Dong-Heon,Chun, Woo-Je,Park, Soo-Hong 한국공간정보학회 2005 한국공간정보시스템학회 논문지 Vol.7 No.3

최근 이동전화, PDA, 텔레매틱스 단말기 등과 같은 모바일 기기의 사용이 늘어나고 있다. 모바일 기기들에서 지원하는 서비스 중 큰 부분을 차지하는 것으로는 위치추적, 경로 탐색 등의 서비스가 있다. 이러한 서비스를 제공하기 위하여 모바일 환경에서의 공간데이터에 대한 사용이 증가하고 있다. 하지만 모바일 기기의 저장 공간이 늘어났음에도 불구하고 여전히 공간데이터에 대한 요구를 수용하기에는 한계가 따른다. 따라서 본 연구에서는 모바일 환경에서 사용되는 공간 데이터에 대한 손실 압축 기법을 제시하고, 실험을 통한 압축률, 데이터 손실 정도를 분석하고자 하였다. 이렇게 제시된 공간 데이터 압축 기법을 실제 데이터에 적용하여 실험해 보고 동일 데이터에 대하여 선행 연구에서 제시한 방법을 적용한 결과와 비교 분석을 통하여 제시된 압축 방법이 높은 위치 정확도를 요구하는 데이터에 적용하였을 때 더 나은 성능을 보이는 것을 제시할 수 있었다. Nowadays, using the mobile communication devices, such as a mobile phone, PDA, telematics device, and so forth, are increasing. The large parts of the services with these mobile devices are the position tracking and the route planning. For offering these services, it is increasing the use of the spatial data on the mobile environment. Although the storage of mobile device expands more than before, it still lacks the necessary storage on the spatial data. In this paper, lossy compression technique on the spatial data is suggested, and then it is analyzed the compression ratio and the amount of loss data by the test. Suggested compression technique on the spatial data at this paper is applied to the real-data, and others methods, suggested at the previous studies, is applied to same data. According as the results from both are compared and analyzed, compression technique suggested at this study shows better performance when the compression result is demanded the high position accuracy.

철도차량용 알루미늄 압출재 설계

이동헌,박재홍 ( Dong Heon Lee,Jay Hong Park ) 대한금속재료학회 1998 大韓金屬學會會報 Vol.11 No.2

건축과 도시개발의 사회경제적 주요 영향과 효과에 관한 역사적 고찰

이동헌,Lee, Dong-Heon 한국건축역사학회 2005 건축역사연구 Vol.14 No.4

Tough Korean architecture and urban environment has been developed for almost 100 years, it still remains various kinds of problems. Many attempts was carried out by every new plan to reduce the problems, it result in requiring more investment than before. It means all the investment for the development has been inefficient and immature to protect economic problems compared with the developed country. For the reason of economic problems it must be studied in historical cases which influenced the economic impacts, before the proposal of index with the economic theory. Searching typical architecture or urban development that brought about economic impacts can be classified into 3 cases. First case is the impact that caused the economic growth, increase, boom like the Westminster & others and the american architectures after the economic crisis. Second case is the impacts that was the origin of decline, shrink in economic as the Palace of Versailles, the skyscrape buildings in america before the economic crisis. Third case is the impact that was the both role of increase and decline in economic as the modern architecture in industrial revolution which led to the national economic growth and the gap between the rich and the poor, and as the american architecture that was the root of crisis and the revival in economic. From the case study, it is clear that architecture has relation with economics in various factors as mass production, labour, and another industries all over the history & the world. Now, architecture strongly needed not only to raise functional, cultural effect and value, but to predict and control the economic impacts with theory from further research of historical cases to policy and practise.

이동형 다중홉 중계기(Mobile Multi-hop Relay) 시스템 성능 평가

이동헌(Dong Heon Lee),김석찬(Suk Chan Kim),김영일(Young-iL Kim) 한국통신학회 2008 한국통신학회 학술대회논문집 Vol.2008 No.7

로봇수술 영상에서 수술도구 추적을 위한 강인한 영상처리 알고리즘

이동헌(Dong Heon Lee),조민우(Min Woo Cho),최재순(Jae Soon Choi),김희찬(Hee Chan Kim) (사)한국CDE학회 2014 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2014 No.2

Robot-assisted surgery that uses robotic systems, such as DaVinci®, with minimal invasive procedure has Been growing over the past years rapidly. However, the technical development for more dexterous and safer operation is still in early stage, and there are several problems remain to be overcome in the robotic surgery. Typical medical problems using a surgical robot system are collision of surgical instruments and tissue damages caused by miscontrolling surgical tools. Therefore, identifying and tracking the position of each surgical instrument in real time during robot-assisted surgery can prevent medical accidents. However, it is difficult to detect the surgical instruments on endoscopic vision due to its complexity, non-uniformity of scene, time-varying lighting condition, back-light, and high surface reflectance, etc. This study proposes several algorithms for tracking surgical instruments, which is robust against the various characteristics of endoscopic images in robot-assisted surgery.

수직증축 리모델링공사의 효율적 관리를 위한 영향요인 분석

이동헌(Dong-Heon Lee),임형철(Hyoung-chul Lim) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.9

국내 공동주택 시장은 1980년대 이후 급격한 경제성장과 함께 부동산 시장이 활발해 짐에 따라 도시인구의 급격한 증가를 보이며 계속적으로 도시에 공급되어 도시 주거문화의 형태로 자리 잡았다. 하지만 시간이 갈수록 대량 공급 되었던 공동주택은 노후화가 진행되어, 재건축을 통해 환경개선을 이루었다. 그러나 재건축은 진행 과정에서 많은 양의 건설 폐기물을 발생시키며, 도심 환경의 악화, 소음, 교통, 세대수 증가 등이 문제점으로 따라 왔으며, 개발이익 위주로 추진되고 있는 재건축에 문제점들로 인해 각종 규제가 강화되자 공동주택 리모델링이 주목 받기 시작 하였고, 최근 주택법 등이 바뀌기 시작하면서 소규모 중, 고층 공동주택 등을 시작으로 수직증축 리모델링 사업이 추진되었다. 환경개선은 물론 시대적 요구사항에 맞게 변모하고 하였으며, 기존 건물을 사용한다는 점에서 여러 우려와 문제점을 나타내기도 하지만 미래적 방향으로 꼭 필요한 리모델링의 한 분야이다. 이에 본 연구는 공동주택 수직증축 리모델링 시공 사례 분석과 기존 연구 자료를 통해 리스크 발생 요인을 유형별로 조사하였고, 시공·시행사, 설계 및 전문가로부터 설문조사 와 면담을 통해 관리개선요소 우선순위 분석을 통하여 상대적 중요도를 선정 하였다. After the 1980s, as the economy was growing rapidly and the real estate market was active, a large increase in population was supplied to the city. Accordingly, the national apartment housing market is located in the form of Urban Housing Culture. On the other hand, with time, the supply apartment houses became superannuated and the residential environment became poor. Therefore, the environment of old apartment houses has been changed to improve by reconstruction. Despite this, reconstruction incurred not only a lot of construction waste, but also problems of environmental degradation, noise, traffic congestion, increasing number of households, and so on. Recently, the housing law has changed, and vertical extension remodeling focused on Small/Medium Town House is underway. This has been changed in response to the demand. This is one of essential parts in the remodeling field for the future, even though it has some problems in how uses existing buildings. Therefore, this study analyzed occurrence risk factor for each type through research materials and case analysis regarding the vertical extension remodeling of apartment housing. In addition, the relative importance was determined through questionnaires and interviews from constructors, designers, and experts in the field.