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경구 bisphosphonate를 복용하는 환자에서 발생한 bisphosphonate-related osteonecrosis of jaw에 대한 임상적 특징 및 처치: 증례보고
최우성,윤현중,이상화,Choi, Woo-Sung,Yoon, Hyun-Joong,Lee, Sang-Hwa 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.6
Bisphosphonates are used effectively for many medical conditions, such as multiple myeloma, Paget's disease, osteoporosis, etc. However, recently, osteonecrosis of the jaw was observed in patients receiving long-term bisphosphonate therapy, including oral administration. This osteonecrosis is refractory, and complete recovery is not guaranteed despite a standard treatment protocol being established by many associations related to oral and maxillofacial surgery. The treatment outcome of oral bisphosphonate-related osteonecrosis of jaw (BRONJ) is reported with a review of the relevant literature.
명암 가중치를 이용한 반복 수렴 공간 모멘트기반 눈동자의 시선 추적
최우성,이규원,Choi, Woo-Sung,Lee, Kyu-Won 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.5
본 논문에서는 명암 가중치를 적용한 반복 공간 모멘트를 이용하여 복잡한 배경에서 사용자의 눈을 정확히 추출하고 추적할 수 있는 눈 추적 시스템을 제안한다. CCD 카메라를 활용하여 촬영한 입력영상으로부터 눈 영역을 찾기 전에 관심영역을 최소화하기 위하여 Haar-like feature를 이용하여 얼굴영역을 검출한다. 그리고 주성분 분석의 고유 얼굴 기반인 고유 눈을 이용하여 눈 영역을 검출 한다. 또한 눈 영역에서 가장 어두운 부분으로부터 눈의 좌 우 상 하 끝점인 특징 점을 찾고, 명암 가중치를 적용한 반복 수렴 공간 모멘트를 이용하여 정확한 눈동자의 시선추적을 확인하였다. In this paper, an eye tracking method is presented by using on iterated spatial moment adapting weighted gray level that can accurately detect and track user's eyes under the complicated background. The region of face is detected by using Haar-like feature before extracting region of eyes to minimize an region of interest from the input picture of CCD camera. And the region of eyes is detected by using eigeneye based on the eigenface of Principal component analysis. Also, feature points of eyes are detected from darkest part in the region of eyes. The tracking of eyes is achieved correctly by using iterated spatial moment adapting weighted gray level.
족부의 종양성 석회증 -자기 공명 영상 및 조직학적 소견의 2예 증례 보고-
최우성,지종훈,이연수,모하메드샤피,최광영,김원유,오세철,Choi, Woo-Sung,Ji, Jong-Hun,Lee, Yeon-Soo,Shafi, Mohamed,Choi, Kwang-Young,Kim, Won-Yoo,Oh, Sae-Cheal 대한족부족관절학회 2004 대한족부족관절학회지 Vol.8 No.2
Tumoral calcinosis is rarely encountered disease, and most of reported cases involved large joints such as hip or elbow. We report two patients with tumoral calcinosis in the foot. In the 1st case, the lesion was observed at the 1st MP joint of foot, and in the 2nd case it was found at the DIP joint of 5th toe area with bony erosion which is rare in other tumoral calcinosis. They all needed evaluation with MRI, and eventually surgical excision.
최우성,신헌철,Choi, Woo-Sung,Shin, Heon-Cheol 한국전기화학회 2010 한국전기화학회지 Vol.13 No.4
기공 경사화된 마이크론 단위의 구조 틀 및 나노 수지상 구조 벽을 가지는 니켈-구리 거품 전극을 전기화학적인 방법으로 합성하였다. 전해 도금 시 순수한 니켈은 치밀한 층으로 성장하는 양상을 보였으나, 구리와 함께 도금시키는 경우 그 성장 양상이 순수한 니켈과는 매우 다르게 관찰되었다. 특히, 첨가제로써 염소 이온의 농도가 증가함에 따라 니켈-구리 도금 층의 수지상 성장이 뚜렷해지는 모습을 보였다. 또한, 기재와 먼 부분일수록 도금 층 내 구리 대비 니켈의 상대적인 양이 감소하였으며, 염소 이온 농도가 높아짐에 따라 전 도금 층에 걸쳐 니켈의 양이 증가하였다. 수지상 구조 벽의 가지 내부 조성을 분석한 결과, 중심부로 갈수록 구리 함량이 점차 높아지는 조성 구배를 확인하였으며, 적절한 열처리를 통해 상호 확산을 유도하여 균일한 조성의 니켈-구리 합금을 얻어낼 수 있었다. 본 연구를 통해 제작된 재료는 기능성 전기 화학 장치용 고성능 전극에 활용될 수 있을 것으로 기대된다. Nickel-copper foam electrodes with pore gradient micro framework and nano-ramified wall have been prepared by using an electrochemical deposition process. Growth habit of nickel-copper co-deposits was quite different from that of pure nickel deposit. In particular, the ramified structure of the individual particles was getting clear with chloride ion content in the electrolyte. The ratio of nickel to copper in the deposits decreased with the distance away from the substrate and the more chloride ions in the electrolyte led to the more nickel content throughout the deposits. Compositional analysis for the cross section of a ramified branch, together with tactical selective copper etching, proved that the copper content increased with approaching central region of the cross section. Such a composition gradient actually disappeared after heat treatment. It is anticipated that the pore gradient nickel-copper nanostructured foams presented in this work might be a promising option for the high-performance electrode in functional electrochemical devices.
호텔기업에 있어 사회적 지원이 경력몰입과 이직의도에 미치는 영향
최우성(Woo Sung Choi),김진강(Jin Kang Kim) 한국관광연구학회 2005 관광연구저널 Vol.19 No.1
The purpose of this study was to find the effects of social supports on career commitment and turnover intention. The findings of the study were as follows : First, regarding social support, workers who had a high perception of the organizational authority and made efforts for the improvement of the well-being of the members have shown a higher career-commitment. Second, regarding the relation between career commitment and turnover intention, a higher career commitment leads to the less turnover intention. Third, regarding the mediating effect of career commitment on the social support and turnover intention, career commitment has not shown a partial mediating effect. In conclusion, hotels need to manage the workers using systematic & scientific means so as to have workers committed to their career with great attention to career commitment.
호텔신입종사원의 감정노동이 조직적응에 미치는 영향 -직업정체성의 조절효과를 중심으로-
최우성 ( Woo Sung Choi ) 관광경영학회 2012 관광경영연구 Vol.52 No.-
This study has two purposes. The first is to examine the relationship between emotional labor and adjustment to organizations. The second is to examine the moderating effect of the occupational identity(i.e., customer loyalty, cooperation and participation) on relationship between emotional labor and adjustment to organizations. The major findings of the study are summarized as follows: First, results showed that emotional labor had significant influence on the adjustment to organizations. Second, the moderating effect of the occupational identity on the relationship between emotional labor and adjustment to organizations, occupational identity(beliefs for autonomy, beliefs for services and sense of vocation) has shown a partial moderating effect. Considering on the basis of such results, hotels must develop education methods and policies to strengthen the occupational identity of employees as well as draw measures for minimizing emotional labor.
최우성 ( Woo Sung Choi ),장홍준 ( Hong Jun Jang ),이태민 ( Tae Min Lee ),현경석 ( Kyung Suk Hyun ),정순영 ( Soon Young Jung ) 한국컴퓨터교육학회 2013 한국컴퓨터교육학회 학술발표대회논문집 Vol.17 No.2
다차원 데이터 색인 구조 중 가장 널리 사용되는 R*-Tree는 그 구조적 복잡성으로 인하여 학습하기 쉽지 않다. 교육 공학적 관점에서, R*-Tree와 같이 구조가 복잡하고 내부 동작을 직접적으로 관찰하기 힘든 경우, 시뮬레이션을 학습 도구로서 활용하는 것이 바람직하다. 그러나 현재까지 그러한 R*-Tree학습 시뮬레이터는 개발되지 않았다. 본 논문에서는 R*-Tree 학습 시뮬레이터를 설계 및 구현한다. 먼저 시뮬레이터의 아키텍처를 설계한 뒤, 내부적으로 동작하는 R*-Tree를 설계 및 구현하였다. 이를 토대로 R*-Tree 학습 시뮬레이터를 설계 및 개발하였다. 본 연구에서 구현한 R*-Tree 시뮬레이터를 이용하여 학습한다면, R*-Tree를 효율적으로 학습할 수 있다.
호텔기업에 있어 경력특성과 경력몰입의 관계에 있어 고용형태와 근무환경의 조절효과
최우성(Woo Sung Choi),조경희(Kyung Hee Cho) 한국관광연구학회 2005 관광연구저널 Vol.19 No.2
The purpose of this study was to find the moderating effects of employment type and job type on relation between career characteristics and career commitment. The findings of the study were as follows : First, regarding the relation between career characteristics and career commitment. those who actively planned their own career moves or decisions, those who were satisfied with their selection or decision in life, those who had more career opportunity or potential development, those who had knowledge and ability to support their career life, those who had higher expected utility of present job, and those who had been given more opportunities to learn up-to-date knowledge & skills by the organization have shown a higher career commitment. Second, regarding the moderating effect of the employment type and job type on the relation between career characteristics and career commitment, the employment type has not moderated, but job type has the relation partially, with higher career commitment for irregular and operation than regular employees and management part.