실험적 안구천공상에서 일차적 공막돌륭술의 효과

이경원,이석준,이종혁,Kyung-won Lee,M,D,Seok-joon Lee,M,D,Jong-hyuck Lee,M,D 대한안과학회 2005 대한안과학회지 Vol.46 No.1

Purpose: Scleral buckles are frequently performed as an additional procedure in perforated ocular injury surgery, but little is known about their independent effect after ocular trauma. The authors made a posterior penetrating ocular injury model in rabbits to evaluate the isolated role of primary scleral buckle placement. Methods: Twenty eyes underwent surgery. The penetrating injury consisted of two 5 mm circumferential incisions placed five clock hours apart and 7 mm behind the limbus. A segmental scleral buckle was placed over a randomly chosen penetrating injury site after wound closure. The degree of the fibrous proliferation, traction, and the presence of retinal detachment were evaluated on follow-up examination. After enucleation and fixation, tissue sectioning was performed including injury sites. The greatest dimension of the fibrous proliferation at both wound sites was measured. Results: Two eyes were excluded from the study due to unsuccessful buckling. Four eyes developed a retinal detachment. The remaining 14 eyes showed varying degrees of proliferation and traction on the retina. The greatest dimension of the fibrous proliferation at the buckle site (1.69±0.29 mm) was significantly different from that at the non-buckle site (2.07±0.37 mm, P<0.05). Conclusion: Primary scleral buckle placement at the time of surgical repair reduces vitreous traction and decreases the degree of fibrous proliferation.

범주형 환경변수를 고려한 부대성과평가 방법에 관한 연구 - DEA와 CCCA의 결합을 중심으로 -

이경원,박명섭,임재풍,Lee, Kyung-Won,Park, Myung-Seop,Im, Jae-Poong 한국국방경영분석학회 2006 한국국방경영분석학회지 Vol.32 No.1

There are many occasions that the performance of a corps is influenced not only by its own efforts but by the commander of the next higher unit in a vertical organizational structure. When the direction of the commander in the next higher organization is different from that of the actual evaluation agency, the unit under evaluation may get rated lower than what it should deserve. This study suggests an alternative method to evaluate the performance of military units in the situation that there exist critical environmental factors which affect the performance. This method employes DEA, a non parametric method, and Constrained Canonical Correlation Analysis(CCCA), a parametric method which is used to estimate a efficient frontier with multiple dependent variables and constraints. This article also exploits a set of categorical environmental variables in the CCCA to improve the fairness of performance evaluation. It is shown that the introduction of the categorical variables helps evaluating the true performance of individual units such as battalions subordinated to different next higher commanders. 계층구조로 이루어진 군부대에서 예하부대의 성과는 피평가부대의 개별적인 노력뿐만 아니라, 그 부대가 속해있는 지휘라인의 1차 상급지휘관의 부대지휘방향에 따라 상당한 영향을 받는 경우가 많다 평가를 담당하는 기관인 2차 상급조직에서 제시하는 평가요소에 대한 중요도가 1차 상급지휘관의 부대지휘방향과 상이하다면, 해당부대는 1차 상급지휘관의 의도를 충실히 구현하였음에도 불구하고 다른 지휘라인의 부대들보다 낮은 평가를 받을 수 있다. 본 연구는 계층적 구조하에서 성과방향의 차이를 야기하는 지휘라인별 특성을 집단외생변수로 취급하여 평가의 공정성을 기하기 위한 연구이다. 비모수적 기법인 DEA와 모수적 기법으로서 다수의 종속변수가 존재하고 모수의 제약을 반영할 수 있는 제약정준상관분석(CCCA: Constrained Canonical Correlation Analysis)의 결합모형을 이용하였으며, 이 과정에서 성과에 영향을 미치는 집단환경변수를 범주화하여 대대급 부대의 성과평가를 수행하였다.

수정된 설계 방정식을 이용한 허니컴 구조의 차폐 효과 예측

이경원,정영철,홍익표,육종관,Lee Kyung-Won,Cheong Yeong-Chul,Hong Ic-Pyo,Yook Jong-Gwan 한국전자파학회 2005 한국전자파학회논문지 Vol.16 No.9

In this paper, the modified design equation of shielding effectiveness was presented to predict more accurately the shielding effectiveness of honeycomb structure with hexagonal waveguide. The design equation of shielding effectiveness in honeycomb was represented from adding shielding effectiveness of single lattice to shielding effectiveness of infinite array of single lattice. This paper proposed the generalized design equation of shielding effectiveness by analyzing basis lattice of hexagonal waveguide which composes honeycomb structure and infinite array structure of basis lattice. To provide the validity of the modified design equation of shielding effectiveness in this paper, comparison with other available date using 3D EM commercial software is made. 본 논문에서는 전자기 차폐 구조로 널리 알려진 육각형 도파관 구조를 갖는 허니컴 구조의 차폐 효과를 정확하게 예측하기 위하여 기존의 차폐 효과 설계식을 수정하여 새로운 차폐 효과 설계식을 제안하였다. 허니컴의 차폐 효과 설계 방정식은 단일 격자의 차폐 효과와 무수히 많은 격자 구조의 차폐 효과의 합으로 표현되는데, 본 논문에서는 허니컴 구조를 이루고 있는 육각형 기본 격자를 해석하고, 기본격자가 다수의 배열로 이루어진 해석을 통해 일반화 된 차폐 효과 설계 방정식을 제안하였다. 제안한 차폐 효과 설계 방정식의 유효함을 입증하기 위하여 상용 소프트웨어의 3D EM 시뮬레이션과 비교하였다. 또한, 측정 결과와 비교하여 본 논문에서 제안한 수정된 차폐 효과 설계 방정식이 기존의 설계 방정식보다 더 정확하다는 것을 보여주었다.

액와접근법을 이용한 무기하 내시경 갑상선 절제술 후 국소 부위 통증 조절 장치(On-Q^Ⓡ PainBuster^Ⓡ)와 자가 통증 조절 장치의 무작위 대조 연구에 대한 예비 자료

이경원,박찬흔,박용래,현기훈,윤지섭,Kyung-Won Lee,Chan-Heun Park,Yong-Lai Park,Ki-Hun Hyun,Ji-Sup Yoon 대한갑상선-내분비외과학회 2013 The Koreran journal of Endocrine Surgery Vol.13 No.4

Purpose: Gasless transaxillary approach to endoscopic thyroidectomy is a widely performed procedure for benign or malignant thyroid neoplasms. However, it requires wide dissection for approaching the target area. The intravenous patient-controlled analgesia (IV PCA) is an effective method for postoperative pain control and patients can use it according to their requirement. However, patients suffer from nausea, vomiting, sleep disturbance, etc. due to opioids. Pain pump ON-Q^Ⓡ PainBuster^Ⓡ (pain buster) has been used widely in various surgeries for control of postoperative localizing and wide area pain without side effects of opioid analgesia because it consists of Ropivacaine. Methods: From Aug. 2008 to Jan. 2013, Gasless transaxillary endoscopic thyroidectomy was performed in 90 patients in a single institution, who were divided into three groups, including the IV PCA, pain buster, and null groups. We compared postoperative outcomes, pain severity between groups. We recorded scores immediately, 6, 12, 24, and 48 hours after surgery following visual analog pain score (VAS), and investigated hospital stay and occurrence of events of nausea, vomiting, and complications. Results: In the IV PCA group, it was discontinued due to nausea in 36.7% of patients. No significant difference in pain severity following VAS score was observed among the three groups. However, smaller numbers of analgesia injections were required in the Pain buster group than in the other groups, and fewer patients suffered from constipation, compared with the PCA group. Conclusion: Pain buster showed even effects compared to IV PCA, with few side effects and less discomfort of patients, compared with the other groups. Therefore, pain buster was thought to be the proper method for pain control after dissection of the anterior chest wall, cervical area in order to secure an operative view for transaxillary endoscopic thyroi-dectomy.

Development of 30W grade Thermo-electric Generation Module for Solar Hot Water System

Kyung-Won Lee(이경원),Ho-Young Seo(서호영),Jeong-Hun Yoon(윤정훈) 한국태양에너지학회 2017 한국태양에너지학회 학술대회논문집 Vol.2017 No.10

Development of thermoelectric module using solar collector

Kyung-Won Lee(이경원),Ho-Young Seo(서호영),Jeong-Hun Yoon(윤정훈) 한국태양에너지학회 2017 한국태양에너지학회 학술대회논문집 Vol.2017 No.4

장애영유아의 가정에서 유아교육,보육기관으로의 전이에 대한 부모와 교사의 인식 및 경험과 지원요구에 관한 연구

이경원 ( Kyung Won Lee ),노진아 ( Jin A Noh ),이미숙 ( Mi Suk Lee ) 한국특수아동학회 2011 특수아동교육연구 Vol.13 No.3

이 연구에서는 장애영유아의 가정에서 유아교육·보육기관으로의 전이에 대한 부모와 교사의 인식 및 경험과 지원요구를 알아보고, 성공적인 전이를 위한 방향을 제시하고자 하였다. 이를 위해 장애영유아의 가정에서 유아교육·보육기관으로의 전이를 경험한 부모 5명과 교사 5명을 연구 참여자로 선정하여 개별면담을 실시하고, 면담결과를 연속적 비교분석법을 통해서 분석하였다. 연구 결과 첫째, 부모와 교사들은 전이와 전이지원에 대해 생소해 하긴 했지만 이에 대한 필요성을 느끼고 있었다. 그리고 전이과정에서 일상생활 적응훈련, 장애에 대한 인식변화, 유아와 관련된 사람들 간의 협력이 중요하다고 생각하였다. 둘째, 체계적인 전이지원이 이루어지고 있지 않았으나, 부모와 교사들은 전이과정에서 나름대로의 전이지원을 실시하고 있는 것으로 나타났다. 하지만 이러한 전이과정에서 부모와 교사들은 장애에 대한 부정적인 편견, 전이로 인한 스트레스, 기관과 정보에 대한 부족, 타 기관과의 연계, 경제적 여건, 의사소통과 관련한 어려움을 겪은 것으로 나타났다. 셋째, 부모와 교사들은 원활한 전이를 도울 수 있는 다양한 전이지원 프로그램 개발이 필요하며, 인력지원, 경제적 지원, 관련연수의 제공, 법적 기초 등이 마련되어야 한다고 언급하였다. 이상의 연구결과를 중심으로, 성공적인 전이를 위한 방안이 논의되었다. The purpose of this study was to investigate perception, experiences, and support needs of parents and teachers of young children with disabilities for transition from home to early childhood centers. For the purpose, individual interviews with 5 parents and 5 teachers were conducted, and the collected data from the interview was analyzed by constant comparative method. In the results, first, although the parents and teachers in the study were unfamiliar with transition, they felt the need for transition support. Also, they thought that the prerequisites for successful transition would be daily living training, change of attitude toward people with disabilities, and collaboration among human resources. Secondly, although systematic transition support was not provided, the parents and teachers provided their own transition efforts during pre- and post- transition period. In addition, the parents and teachers in the study had difficulties due to prejudice against people with disabilities, transition-related stress, a lack of institutions and information, poor collaboration with other institutions, financial conditions, and inefficient communication. Lastly, the parents and teachers found it necessary to be provided with transition support. Based on these results, suggestions for effective transition support were discussed.

과르디니에서의 대립철학과 인간 삶의 영역에서 자기경험

이경원 ( Kyung Won Lee ) 한국동서철학회 2001 동서철학연구 Vol.22 No.-

한국 법조인의 행태적 특성 분석

이경원(Lee Kyung-Won),김정화(Kim Joung-Hwa) 서울행정학회 2002 한국사회와 행정연구 Vol.13 No.1

Historically the legal profession has established its professional autonomy based on the exclusive knowledge and technology which are claimed as essential for the specific conflict-solving. However, according to Freidson(1970a; 1970b; 1986), there are some conditions that make possible the legal profession to maintain such autonomy. The self-regulation constitutes the essential part of what the autonomy is to be upheld. We assume that the legal professionals in Korea have failed to maintain the rule of self-regulation at collective level. They have beefed up their own interests regardless of what the public want. The failure of self-regulation has brought about its consequences. The government not the professionals in collective manner has tried to intervene and set the reform agenda. It is in fact major setback in terms of maintaining autonomy which is essential character, according to Freidson, of what the professionals are all about. We focus on the behavior characteristics of legal professionals in Korea. As professionals what are the distinctive characteristics of they have formed and their ramification to the government policy toward the profession. We intend to examine the issues from the perspective of professionalism.

과르디니의 대립론에 기초한 생명체와 삶의 이해

이경원(Kyung Won Lee) 철학연구회 2001 哲學硏究 Vol.53 No.-