광범위 미세 피복 대퇴스템을 이용한 인공 고관절 재치환술 인공 고관절 재치환술

김진학 ( Jin Hak Kim ),이송 ( Song Lee ),김경태 ( Kyung Tae Kim ),박훈석 ( Hoon Seok Park ),전영원 ( Young Won Jeon ) 대한고관절학회 2006 Hip and Pelvis Vol.18 No.1

목적: 근위 대퇴부의 골결손 및 골다공증이 심한 경우 광범위 미세 피복 대퇴스템을 사용하여 재치환술을 시행하고 그 결과를 보고 하고자 한다. 대상 및 방법: 2000년 8월부터 2003년 4월까지 무시멘트성 광범위 미세 피복 대퇴스템을 이용하여 재치환술을 시행한 14예를 후향적으로 조사하였다. 추시기간은 평균 33개월(24-53개월)이었고, 평균연령은 52.3세(33~66세)였으며, 남자 10예 여자 4예였다. 재치환술의 원인으로는 무균성 해리 11예 (78.7%), 진행되는 골용해 1예 (7.1%), 감염성 해리 1예 (7.1%), 대퇴스템 주위 골절 1예 (7.1%)였다. 결과: Harris hip score는 술전 평균 50.4점에서 술후 평균 88.5점으로 향상되었으며 합병증으로 대전자부 골절이 2예(14.3%), 대퇴스템 주위 골절 1예(7.1%), 고관절 탈구 2예(14.3%)가 있었으며, 경도의 대퇴부 동통이 2예(14.3%)에서 관찰되었다. 대퇴 삽입물의 고정도는 11예(78.6%)에서 골성 안정소견을 보였으며 3예(21.4%)에서 섬유성 안정소견을 보였다. 5 mm 이상의 대퇴스템 침강을 보인 경우가 1예(7.1%), 10 mm 이상의 대퇴스템 침강을 보인 경우가 2예(14.3%)있었으나 술후 1년 이후에는 더 이상의 진행 소견은 없었다. 중등도의 응력방패 현상을 보인 경우가 4예(28.6%) 있었으나 현재까지 심한 마모나 골용해를 보인 예는 없었다. 결론: 무시멘트성 광범위 미세 피복 대퇴스템은 근위 대퇴골 결손이 심한 인공 고관절 재치환술시 단기적인 결과로는 유용한 선택으로 보여지나 수술 후 합병증 등에 대해서는 장기간의 추시 관찰을 요한다. Purpose: To report the outcomes of extensively porous-coated femoral stems based on diaphyseal fixation caused by extensive bone loss and osteoporosis of the proximal femur in revision total hip arthroplasty. Materials and Methods: 14 cementless femoral revision procedures performed between Aug, 2000 and Apr, 2003 were reviewed retrospectively. The follow up period ranged from 24 to 53 months, with an average of 33 months. The average age at surgery was 52.3 years, there were 10 males and 4 females. The reasons for the revision surgery were aseptic loosening in 11(78.7%) hips, progressive osteolysis in 1(7.1%), septic loosening in 1(7.1%) and periprosthetic fracture in 1(7.1%). Results: The Harris hip score improved from 50.4 points preoperatively to 88.5 points postoperatively. The complications encountered were a greater trochanteric fracture in 2 hips (14.3%), periprosthetic fracture in 1(7.1%), dislocation of the hip in 2(14.3%), and minimal thigh pain in 2(14.3%). Radiographic evidence of a bone ingrown stem was found in 11 hips (78.6%), and 3 hips (21.4%) showed stable fibrous fixation. Stem subsidence > 5mm was noticed in 1 hip (7.1%) and > 10mm in 2 (14.3%) but there was no further progression after 1 year. Moderate stress-shielding was noticed in 4 hips(28.6%). To date, no significant wear or osteolysis has been observed. Conclusion: An extensively porous-coated revision stem appears to be a reasonable choice in the presence of proximal femoral bone loss as a short term follow up. However, the concerns related to the postoperative complications will require a longer term follow up.

에지 방향 히스토그램을 이용한 텍스트 문서 영상의 워터마킹 (pp.203-212)

김영원(Young-Won Kim),오일석(Il-Seok Oh) 한국정보과학회 2004 정보과학회논문지 : 소프트웨어 및 응용 Vol.31 No.2

워터마킹은 멀티미디어 컨텐츠의 저작권을 보호하기 위한 방법이다. 이러한 미디어 중에서 텍스트 문서는 블록/줄/단어의 계층 구조와 배경/전경의 확연한 구분 같은 고유한 특성을 나타내므로, 텍스트 문서를 위한 워터마킹 알고리즘은 이러한 특성을 잘 반영하여 설계하여야 한다. 본 논문은 명암을 갖는 텍스트 문서 영상을 위한 워터마킹 알고리즘을 제안한다. 워터마크 신호는 에지 방향 히스토그램을 통해서 삽입된다. 문서 영상의 부분 영상들은 모두 유사한 성질을 갖는다는 ‘부분 영상 일관성’을 제시한다. 한글 영상, 영문 영상, 한문 문서 영상을 대상으로 부분 영상 일관성을 조사하여, 부분 영상 일관성은 언어에 무관하며 다양한 문서 영상에 적용할 수 있음을 보인다. 워터마크 신호를 삽입하기 위하여 에지방향 히스토그램을 조작하였으며 다양한 실험을 통해 알고리즘의 비인지성과 강인성을 분석하고 평가하였다. The watermarking is a method to achieve the copyright protection of multimedia contents. Among several media, the text documents show very peculiar properties: block/line/word patterning, clear separation between foreground and background areas. So algorithms specific to the text documents are required that meet those properties. This paper proposes a novel watermarking algorithm for the grayscale text document images. The algorithm inserts the watermark signals through the edge direction histograms. A concept of sub-image consistency is developed that the sub-images have similar shapes in terms of edge direction histograms. Using Korean, Chinese, and English document images, the concept is evaluated and proven to be valid over a wide range of document images. To insert watermark signals, the edge direction histogram is modified slightly. The experiments were performed on various document images and the algorithm was evaluated in terms of imperceptibility and robustness.

Modified Trapezoidal PWM을 베이스로 한 CRPWM Boost Type AC/DC Converter

권영원(Young-Won Kwon),노의철(Eui-Cheol Nho),김인동(In-Dong Kim),김만고(Marn-Go Kim),전성즙(Seong-Jeub Jeon),조철제(Cheol-Je Joe),문성득(Sung-Deuk) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7

This paper describes a current regulated PWM boost type rectifier based on modified trapezoidal PWM. Each switch of a converter has no switching for one third period of a fundamental line current. Therefore, the switching loss of the proposed scheme is less than that of the hysteresis current controller.<br/> Operating principle is described and slmulations and experiments are carried out.

XGBoost 기반 침입탐지모델을 위한 데이터 스케일링 및 특성선택 기법 연구

김영원(Young-Won Kim),이수진(Soo-Jin Lee) 한국컴퓨터정보학회 2022 한국컴퓨터정보학회 학술발표논문집 Vol.30 No.2

안셀무스의 『프로슬로기온』에 나타난 교리담론과 기도담론의 변증법

김영원 ( Young Won Kim ) 서울대학교 종교문제연구소 2015 종교와 문화 Vol.0 No.29

The Purpose of this paper is to identify and analyze the dialectic of prayer discourse and doctrinal discourse within Anselm’s Proslogion. As a matter of fact, these different kinds of discourse have not been dealt with together in the sense that only doctrinal and philosophical discourses of Proslogion II-IV were the focus of limelight in the academic realm. From the perspective of Anselm’s life as a monk in Bec, however, we need to analyze doctrinal and philosophical discourses within the Proslogion in a necessary relationship with prayer discourse since he wrote the Proslogion within the context of monastic life, in which prayer discourse and doctrinal discourse were not systematically separated yet. Furthermore, the prayer discourses especially in Proslogion I, the end of IV, XIV, and XXIV showed that doctrinal discourses within the Proslogion were sublated to a higher level through these prayer discourses. Thus, in order to interpret the Proslogion properly, we need to seriously consider the dialectic of prayer discourse and doctrinal discourse in the future studies. This insight from the analysis of the Proslogion urges us to reconsider the way of dealing with religious classical texts in two respects. First, we need to develop a holistic approach which includes their practical and theoretical aspects. Second, we need to find a meaningful message from these texts in order to enlighten the barren modern minds.

공기업 중간관리자 리더십 요인의 중요도에 관한 연구

김영원 ( Kim¸ Young Won ),배상완 ( Bae¸ Sang Wan ),이동명 ( Lee¸ Dong Myung ) 한국경영공학회 2023 한국경영공학회지 Vol.28 No.3

Purpose The purpose of this study is to identify the leadership factors of middle managers in public enterprises and to determine the relative importance and priority of the factors Methods A survey was conducted on 62 middle managers and practitioners in public enterprises, and the survey data were analyzed in a three-level hierarchical structure using the AHP method. Results The study found the following results. First, the importance of competency factors was higher than that of personality factors in the first stage factor evaluation. In the evaluation of the sub-factors in the second stage, the importance of the competency factors was observed in the order of communication competency, management competency, and job competency, and the personality factors appeared in the order of morality and sociality. Next, looking at the overall importance and priority of the sub-factors of the 3rd stage, problem solving, listening, fairness, honesty, responsibility, empathy, trust, motivation, respect, goal setting, compensation, conflict resolution, caring, healing, and modeling are in order. Conclusion In order to achieve sustainable growth of a public enterprise, the leadership of a middle manager who is ultimately in harmony with work-oriented competence and personality such as morality and sociality is required.

동적 윤곽선 모델을 이용한 PC 카메라 영상에서의 얼굴 윤곽선 추출

김영원(Kim Young-Won),전병환(Jun Byung-Hwan) 한국콘텐츠학회 2005 한국콘텐츠학회 종합학술대회 논문집 Vol.3 No.2

얼굴 추출은 휴먼 인터페이스와 생체 인식 및 보안을 위해 매우 중요한 분야이다. 본 논문에서는 동영상에서 얼굴의 윤곽선을 추출하기 위해, DCM(Dilation of Color and Motion)필터와 동적 윤곽선 모델(Active Contour Model)을 적용한다. 먼저, 본 논문에서 제안된 DCM 필터는 모폴로지의 팽창 연산이 적용된 얼굴 색상영상과 차영상을 결합하고 이를 다시 팽창한 것으로 동영상에서 복잡한 배경을 제거하고 얼굴 영역을 검출하기 위해 사용된다. 동적 윤곽선 모델은 초기 곡선에 영향을 많이 받으므로, 얼굴과 눈, 입의 기하학적인 비율을 이용하여 회전정도를 구한 후, 이를 이용하여 초기 곡선을 자동으로 설정한다. 에지가 약한 부분에서의 윤곽선 추출을 위해, 스네이크의 영상에너지로 에지영상과 밝기영상을 함께 사용하였다. 복잡한 배경이 있는 실내 환경에서 총 5명으로부터 양 눈이 보이는 다양한 헤드 포즈 영상을 25장씩 샘플링하여 총 125장에 대해 실험한 결과, 얼굴 윤곽선의 평균 추출률은 98.1%, 평균 처리시간은 0.2초로 나타났다. The extraction of a face is a very important part for human interface, biometrics and security. In this paper, we applies DCM(Dilation of Color and Motion) filter and Active Contour Models to extract facial outline. First, DCM filter is made by applying morphology dilation to the combination of facial color image and differential image applied by dilation previously. This filter is used to remove complex background and to detect facial outline. Because Active Contour Models receive a large effect according to initial curves, we calculate rotational degree using geometric ratio of face, eyes and mouth. We use edgeness and intensity as an image energy, in order to extract outline in the area of weak edge. We acquire various head-pose images with both eyes from five persons in inner space with complex background. As an experimental result with total 125 images gathered by 25 per person, it shows that average extraction rate of facial outline is 98.1% and average processing time is 0.2sec.

안셀무스의 『모놀로기온』(Monologion)

김영원(Young Won Kim) 한국기독교학회 2014 한국기독교신학논총 Vol.91 No.-

The purpose of this article is to re?evaluate Barth`s analysis of Anselm`s theological epistemology in Anselm: Fides Quaerens Intellectum. Barth understood Anselm`s theological epistemology embedded in the Proslogion II?IV as a mode of analogia fidei. The essence of the analogia fidei is faithfulness to the biblical revelation, that is, obedience to the Word of God and ultimately to the reality of God. Barth argued that his analysis of Anselm`s theological epistemology was based on his own research and interpretation of almost the entire works of Anselm. However, the Monologion which was written one year before the emergence of the Proslogion did not adopt a mode of the analogia fidei which Barth argued can be applied to the whole context of Anselm`s works. In the Monologion, Anselm did not depend on the authority of the Bible for the validity of his argument. Furthermore, he proved the existence of God not from the concept of God as in the case of Proslogion II but from creatures. This kind of proof is closer to the cosmological argument which was later promulgated by Aquinas. Moreover, in Monologion LXIV?LXVII the rational mind of a human being is suggested as the foundation of his theological epistemology. In this sense, the theological epistemology of the Monologion does not belong to analogia fidei but to analogia entis. Therefore, we need to re?evaluate Barth`s understanding of Anselm`s theological epistemology through a closer and meticulous research of Anslem`s other works such as the De Grammatico, the Meditationes and the Cur Deus Homo.

충돌 유도기하를 기반으로 한 통합된 형태의 정면, 후면요격 유도 기법

김보석(Boseok Kim),김영원(Young-Won Kim),이창훈(Chang-Hun Lee) 한국항공우주학회 2020 한국항공우주학회 학술발표회 논문집 Vol.2020 No.7

高麗磁器와 中國磁器의 比較硏究

金英媛(Kim Young Won) 한국미술사학회 1986 美術史學硏究 Vol.- No.171·172