상관적분 기법의 프랙탈 차원 추정을 통한 기후관측소 밀도 분석에 관한 연구

김희경,이영섭,Kim, Hee-Kyung,Lee, Yung-Seop 한국데이터정보과학회 2013 한국데이터정보과학회지 Vol.24 No.1

현재 세계기상기구에 등록되어 있는 우리나라 기후관측소는 11개 지점이다. 11개 지점의 분포를 보면 지리적으로 균일하지 못하고 대부분이 해안에 위치하는 편중된 분포를 보이고 있다. 따라서 기후관측소 자료를 바탕으로 하는 전국 기후자료 생산 및 특성 산출을 위해서는 관측소 밀도에 관한 분석을 통해 기후자료 분포에 대한 균형도의 측정이 필요하다. 본 연구에서는 상관적분 기법을 이용한 프랙탈 차원의 추정을 통해 우리나라 기후관측소 밀도를 측정하였다. 상관적분 기법 적용시 회귀분석을 통하여 추정된 회귀계수로 프랙탈 차원을 추정한다. 추정된 프랙탈 차원을 이용해 전국의 기상관서들 중 지리적으로 기후관측소 구성의 균형도를 가장 높여 줄 수 있는 기후관측소 후보지점을 선정하였다. 이 때 후보지점을 순차적으로 선택하는 방식과 조합의 형태로 여러 후보지점을 한 번에 선택하는 방식으로 각각 최적의 후보지점들을 선택하였다. Currently we have 11 climatological stations registered in World Meteorological Organization. Geographically, these stations are unevenly distributed in Korea and are mainly located on seaside. Therefore station's density analysis should be performed to produce the high-quality climatological data. Using the correlation integral method, the density of climatological stations can be measured by the estimation of fractal dimension. In this study, new climatological stations having the higher fractal dimension were selected. Sequential or simultaneous selection method were carried out until 3 new stations were selected based on the fractal dimension.

무손실 영상 압축을 위한 변형된 정수 변환들에 대한 성능 분석

김희경,유훈,Kim, Hui-Gyeong,Yoo, Hoon 한국정보통신학회 2012 한국정보통신학회논문지 Vol.16 No.6

본 논문에서는 무손실 영상 압축에서 쓰이는 변형된 정수 변환들을 설명하고 이를 2차원으로 확장한 것에 대한 성능 분석을 제시한다. 변형된 정수 변환들은 2차원으로 확장하는 방법에 따라서 그 성능 및 복잡도가 다른 면이 있다. 따라서 본 논문에서는 분리 가능한 형태로 확장한 변형 H.264 정수 변환 및 리프팅 구조를 이용한 가역 정수 변환과 분리 가능하지 않은 형태로 확장한 JPEG XR의 PCT변환에 대한 성능 및 복잡도를 비교 분석하여 제시하고, 이에 관련된 실험 결과를 제공한다. 실험 결과는 리프팅 구조를 이용하여 변형된 가역 정수 변환을 분리 가능한 형태로 확장하는 방법이 압축 효율면에서 가장 우수함을 보여준다. In this paper, we introduce modified integer transforms for lossless image compression and evaluate their performances for two-dimensional transforms. The two-dimensional extensions of the modified integer transforms show different performances in terms of coding efficiency and computational complexity. Thus, we measure performances for two-dimensional separable transforms and a two-dimensional non-separable transform. The separable modified integer transform used in H.264, the modified integer transform using the lifting scheme, and the non-separable transform in JPEG XR are evaluated in this paper. Also, experiments and their results are given. The experimental results indicate that the modified integer transform using the lifting scheme shows the best performance in terms of compression efficiency.

실제 상황에서 발화된 영어 단어 강세의 음성 실현

김희경,김수정,Kim, He-Kyung,Kim, Soo-Jung 한국음성학회 2006 음성과학 Vol.13 No.4

This study examines the phonetic realizations of English word stress to identify the influence of experiment method on experiment results. Stimuli uttered by native and Korean ESL beginners in authentic conversations are extracted to be shuffled according to their positions in utterances and information structure. Results indicate that the acoustic characteristics of English word stress are realized depending on its position in utterances. The native speakers correlate the stressed syllables in shorter duration with higher pitch and stronger intensity at sentence-final positions unlike the previous experiments and the traditional definition that stressed syllables are uttered in longer duration with higher pitch and stronger intensity; at sentence-medial positions, the native speakers correlate the stressed syllables in longer duration with higher pitch and no regularity in intensity or in shorter duration with lower pitch and intensity depending on their conversational intention. Korean ESL beginners correlate the stressed syllables in shorter duration regardless of positions in sentences with no regularity in pitch and intensity. This study, thus, shows that a different experiment method may result in different results on the phonetic realizations of English word stress.

Implant-supported prosthetic rehabilitation for the edentulous maxilla using the additive manufacturing technology: A case report

김희경,Kim, Hee-Kyung The Korean Academy of Prosthodonitics 2018 대한치과보철학회지 Vol.56 No.2

The direct metal laser sintering (DMLS) technique would be promising for the full-arch implant-supported restorations due to reduced cost and manufacturing time without potential human errors and casting defects. The aims of this case report were to describe the successful outcome of an implant-supported fixed dental prosthesis in the edentulous maxilla by using the DMLS technology and computer-aided design and computer-aided manufacturing (CAD/CAM) monolithic zirconia crowns, and to describe its clinical implications. A healthy 51-year-old Korean woman visited Seoul National University Dental Hospital and she was in need of a rehabilitation of her entire maxilla due to severe tooth mobility. In this case, all maxillary teeth were extracted and an implant-supported fixed dental prosthesis was fabricated that involved a cobalt-chromium (Co-Cr) framework with the DMLS technique and CAD/CAM monolithic zirconia crowns. Six months after delivery, no distinct mechanical and biological complications were detected and the prosthesis exhibited satisfactory esthetics and function. In this case report, with the DMLS system, the three-dimensional printed prosthesis was created without additional manual tooling and thus, reliable accuracy and passive fit were obtained. 직접식 금속 레이저 소결 방식 시스템은 기공 오차 및 주조 결함 없이 제작 비용 및 제조 시간 단축을 장점으로 전악 임플란트 지지 고정성 보철물 제작에 유용하다. 본 증례에서는 직접식 금속 레이저 소결 방식과 치과용 캐드캠으로 제작된 단일구조 지르코니아 크라운을 사용하여 무치악 상악에서 임플란트 지지 고정성 치과 보철물의 성공적인 결과를 보고하고 임상적 의의를 평가하였다. 51세의 건강한 중년 여성이 상악 전 치아의 동요도를 주소로 서울대학교 치과병원에 내원하였다. 모든 상악 치아 발치 후 직접식 금속 레이저 소결 기술 및 캐드캠 단일구조 지르코니아 크라운을 사용하여 코발트-크롬 프레임을 포함하는 임플란트 지지 고정성 치과 보철물을 제작하였다. 최종 수복물 장착 6개월 후, 기계적 및 생물학적 합병증은 발견되지 않았고 보철물은 기능 및 심미적으로 만족스러운 결과를 보였다. 직접식 금속 레이저 소결 시스템을 이용하여 추가적인 기공 작업 없이 임플란트 지지 고정성 보철물을 제작하여 제조 시간을 단축하고 신뢰할 수 있는 정확도와 적합성을 얻었다.

Poly Phase Filter 기반의 영상 스케일러를 이용한 개선 된 정맥 영역 추출 방법

김희경,이승민,강봉순,Kim, HeeKyung,Lee, Seungmin,Kang, Bongsoon 한국정보통신학회 2018 한국정보통신학회논문지 Vol.22 No.5

생체 인식 방식 중 하나인 지문 인식과 홍채 인식 등은 태양광과 같은 외부 요소에 쉽게 영향을 받는다. 따라서 최근에는 생체 내부의 특징을 이용하는 방법으로 지정맥 인식을 이용하고 있다. 정확한 정맥 인식을 위해서는 정맥 영역과 배경 영역을 확실하게 분리하는 것이 중요하다. 하지만 입력 영상에 포함 된 불균일한 조명 성분의 영향으로 정맥 영역과 배경 영역을 분리하는 것이 어려웠기 때문에 입력 영상의 조명 성분을 정규화 시킨 후 정맥 영역과 배경 영역을 분리 할 수 있는 방법이 제안되었다. 본 논문에서는 기존의 조명 정규화 방법을 바탕으로 영상 스트레칭 과정이 포함 된 영상의 전처리 단계와 이진화, 레이블링 방법을 개선하여 기존의 정맥 인식 기법에 비해 더 나은 질적 개선을 이루고 처리 속도를 향상 시킬 수 있는 방법을 제안한다. Fingerprint recognition and iris recognition, which are one of the biometric methods, are easily influenced by external factors such as sunlight. Recently, finger vein recognition is used as a method utilizing internal features. However, for accurate finger vein recognition, it is important to clearly separate vein and background regions. However, it is difficult to separate the vein region and background region due to the abnormalized illumination, and a method of separating the vein region and the background region after normalized the illumination of the input image has been proposed. In this paper, we proposed a method to enhance the quality improvement and improve the processing time compared to the existing finger vein recognition system binarization and labeling method of the image including the image stretching process based on the existing illumination normalization method.

유방의 고형성 유두상 암종의 세침흡인 세포학적 소견 - 점액성 암종을 동반한 1예 보고 -

김희경,김동원,진소영,이동화,Kim, Hee-Kyung,Kim, Dong-Won,Jin, So-Young,Lee, Dong-Wha 대한세포병리학회 2001 대한세포병리학회지 Vol.12 No.2

Solid papillary carcinoma of the breast is a distinctive form of intraductal papillary carcinoma frequently associated with both mucinous carcinoma and infiltrating ductal carcinoma, not otherwise specific. To our knowledge, this case is the first description of the cytologic aspects of solid papillary carcinoma of the breast in the Korean literature. We experienced a case of solid papillary carcinoma of the right breast diagnosed by fine needle aspiration cytology(FNAC) in a 70-year-old female. FNAC from the right breast showed high cellularity consisting of mostly tight clusters of tumor cells and a few scattered tumor cells. The nuclei were monotonously round to oval in shape with inconspicuous nucleoli. The cytoplasm was abundant and finely granular. Scant amount of mucinous material was present on the background. The diagnosis was confirmed histologically and immunohistochemically.

불임 여성의 사회적 지지와 불임 스트레스

김희경,Kim, Hee-Kyung 한국여성건강간호학회 1999 여성건강간호학회지 Vol.5 No.1

The purpose of this study was determine the relationship between social support and the infertility stress of infertile women. The subjects for this were 64 infertile women living in S city, Kyung Book Province. The data was collected during $4^{th}$ July and $14^{th}$ August, 1988 using the social support scale developed by Park(1985) and the infertility stress scale developed by Kim et. al.(1995) The data analysis was done by descriptive statistics, t-test, ANOVA, Pearson correlation coefficient and stepwise multiple regression using SPSS PC program. The results were as follows. 1. The mean of social support of the infertile women was 3.80. 2. The negative correlation was revealed between social support and the infertility stress(r=-.56, p=.001). 3. Research has revealed that the support need of social support was a predictor of the infertility stress of the infertile women, explaining 30.9% of total variance. 4. the general characteristic variable significantly related to the level of the infertility stress of the infertile women was marriage satisfaction(t=-3.28, p=.004). The results of this study suggest that social support is related to the infertility stress of the infertile women. Therefore, The nurse is recommended to apply supportive intervention in caring for infertile women.

8체질침으로 치료한 금음체질(金陰體質, Colonotonia) 알레르기비염환자 3례

김희경,홍승욱,Kim, Hee-Kyung,Hong, Seung-Ug 대한한방안이비인후피부과학회 2009 한방안이비인후피부과학회지 Vol.22 No.2

Objective : This study is to investigate the effect of 8 Constitution Acupuncture on allergic rhinitis patients Methods : We treated 3 allergic rhinitis patients diagnosed as Colonotonia with 8 Constitution Acupuncture by dry needle. The degree of improvement was evaluated by Visual Analogue Scale(VAS) Results & Conclusions : After taking 8 Constitution Acupuncture sessions, the symptoms of allergic rhinitis was improved. After 8 Constitution Diet, the effect of therapy was lingered. This study shows that the allergic rhinitis can possibly be treated not only with herb medicine, but also with acupuncture and diet.

한 대학병원 부속 건강검진센터 이용자의 만족도와 재이용 의사에 미치는 요인

김희경,류황건,Kim, Hee-Kyoung,Ryu, Hwang-Gun 한국병원경영학회 2001 병원경영학회지 Vol.25 No.3

The purpose of this study was to serve as a basis for providing quality medical service and mapping out consumer-centered marketing strategies to successfully cope with the rapidly changing medical environment and meet consumer needs, by examining what affected the satisfaction and revisit of health Promotion center Client. The subjects in this study were 186 of visitor to health Promotion center in a university hospital in the city of Busan. A survey was conducted with structured questionnaire from March 2 to 30, 2001. The collected data were analyzed with SPSS for Windows (ver10.0). For more statistical analysis, frequency analysis, component analysis, t-test, ANOVA and correlation analysis procedures were utilized. Results of the study can be summarized as follows: 1. Regarding demographic characteristics, 51.6% of the Client investigated were male, and 48.4% were female. The greatest number of them were in their 40s(38.9%). 86.5% were married, and 34.2% were self-employed. 44% were a high-school graduate, and the monthly mean income of 59.4% was one to three million Won. And, the residential area of 46.8%, the largest percentage, was a half-an-hour distance from health Promotion center. 2. The most common motivation of their selection of the health Promotion center was a recommendation by Staff and neighborhood(59.7%), followed by excellent facilities and services(17.2%), the tradition and reputation of the hospital(7.5%), and its publicity pamphlets(7.5%). 3. 45.9%, the largest percentage, acquired health-related information from their friends or acquaintances. 43.8%, the greatest percentage, visited there because they felt there's something wrong with their body. 53.4% worried about the possibility of being attacked by cancer, and 57.5% wanted to take a precise cancer examination. For health maintenance, 50.1% got regular exercise. Regular exercise was considered most crucial for health maintenance or promotion. 4. The largest reason they used that examination center again was the kindness of employees(52.7%), followed by the tradition and reputation of the hospital(21%) and excellent examination setting and equipment(10.8%). 5. By demographic factor, there was no significant difference between the man and women in satisfaction level with examination and expenses. The women expressed more satisfaction at facilities, and the high-school graduate group were more contented with expenses. 6. As a result of investigating their satisfaction level according to the motivation of selecting that examination center, the group that chose the center due to excellent facilities and services were more satisfied with examination and expenses. 7. As for the relationship of total examination satisfaction to revisit. intention, there was a higher correlational relationship between total health examination satisfaction and expense satisfaction. Especially, the more they were satisfied with examination, the more they were willing to revisit there for another examination.

지역문화관광 웹사이트의 분석 및 개선 방안에 관한 연구 : 부산광역시의 문화관광정보시스템을 중심으로

김희경,Kim, Hee-Kyung 한국과학기술정보연구원 과학기술정보센터 2007 Journal of Information Science Theory and Practice Vol.38 No.4

The purpose of this research is to analyze the problems of regional culture and tourism websites and to seek for the ways to improve those websites since the culture and tourism information websites of local government do not provide enough contents and service. This research is based on following 4 indicators, content evaluation, usability evaluation, design evaluation and interactivity evaluation which are used to evaluate tourism homepages of municipality by Korea Tourism Organization. The result of this research came out with the issue that regional cultural tourism websites lack user-oriented contents. Therefore, regional culture and tourism websites need to provide the custom-made information such as setting a free tourist route, complementing reservation system and diversifying the range of search. 본 연구의 목적은 지방정부에서 제공하는 문화관광정보 웹사이트가 콘텐트와 서비스적인 면에서 충실하지 못하므로 지역문화관광 웹사이트의 분석을 통해 문제점을 분석하고 개선 방안을 모색하는 것이다. 연구의 방법은 지역문화관광 웹사이트를 분석 및 평가하기에 적합한 요인들을 도출한 한국관광공사 지자체 관광분야 홈페이지 평가지표인 콘텐트 평가, 사용성 평가, 디자인 평가, 상호작용성 평가의 4개 항목을 근거로 분석을 실시하였다. 연구결과 지역문화관광 웹사이트의 가장 큰 문제점은 사용자중심의 콘텐트와 서비스가 부족하다는 것이었다. 따라서 자유로운 관광경로 설정, 예약시스템의 보완, 다양한 검색 기능의 강화 등 지역문화관광 웹사이트는 사용자의 요구를 반영한 맞춤형 정보를 제공하여야 한다.