전진적 단계 알고리즘을 이용한 대용량 데이터와 순차적 배치 데이터의 분류

윤영주,Yoon, Young Joo 한국데이터정보과학회 2014 한국데이터정보과학회지 Vol.25 No.6

본 논문에서는 대용량이거나 시간에 따라 순차적으로 들어오는 데이터의 분류를 위한 전진적 단계 알고리즘을 제안한다. Adaboost 알고리즘은 노이즈가 있는 데이터에 대하여 성능이 떨어지는 것으로 알려져 있다. 이를 해결하기 위한 한 가지 방법으로 전진적 단계 선형 회귀 방법을 사용한다. 대용량 데이터나 순차적 배치 데이터의 경우에도 이러한 상황을 극복하기 위해 전진적 단계 알고리즘 방법을 적용한 방법을 제안한다. 모의실험과 실제 자료 분석을 통해 제안된 알고리즘이 좋은 성능을 보임을 알 수 있었다. In this paper, we propose forward stagewise algorithm when data are very large or coming in batches sequentially over time. In this situation, ordinary boosting algorithm for large scale data and data batch stream may be greedy and have worse performance with class noise situations. To overcome those and apply to large scale data or data batch stream, we modify the forward stagewise algorithm. This algorithm has better results for both large scale data and data batch stream with or without concept drift on simulated data and real data sets than boosting algorithms.

Simultaneous observations of SiO v=1 and v=2, J=1-0 masers toward WX Pisces with the KVN+VERA

윤영주,조세형,김재헌,윤동환,조치영,Yun, Youngjoo,Cho, Se-Hyung,Imai, Hiroshi,Kim, Jaeheon,Yoon, Dong-Hwan,Cho, Chi-Young 한국천문학회 2012 天文學會報 Vol.37 No.2

We present the results of simultaneous observations of SiO v=1 and 2, J=1-0 maser lines which were carried out with the combined network of the KVN and VERA in 2012 April. The observations were performed toward a long period OH/IR star, WX Psc in order to test the technical and scientific feasibilities of the KVN+VERA combination. The resultant (u, v) coverage of the KVN+VERA combined array enhances the image quality. We confirmed that the distribution and intensity of individual maser spots using the combined network are more reliable compared with the images using the KVN or VERA only. This observation also provides a chance to find a high sensitivity and imaging quality which are comparable to those of VLBA. In addition, the simultaneous observations of two SiO v=1 and 2, J=1-0 maser lines enable us to trace the detail physical environments close to the central star due to different high excitation conditions between two lines at a time.

최근 10년간 조선대학교 부속치과병원 교정과에 내원한 부정교합 환자에 관한 역학적 연구(1990${\sim}$1999)

윤영주,김광원,황미선,Yoon, Young-Jooh,Kim, Kwang-Won,Hwang, Mee-Sun 대한치과교정학회 2001 대한치과교정학회지 Vol.31 No.2

본 연구는 부정교합 유형이나 지역 분포 및 시대적 변화 등을 파악하고 이해함으로써 환자의 적절한 의사소통을 위한 자료나 정보제공을 용이하게 하기 위해, 적절한 진단과 치료계획을 수립하는 데 도움을 주기 위해, 다가오는 21세기에 변모될 치의학을 준비하고 발전의 도약을 마련하기 위해, 향후 부정교합 치료의 방향성을 설정하기 위해 시행하였다. 이를 위해 1990년부터 1999년까지 10년간 조선대학교 부속치과병원 교정과에 내원하여 진단받은 부정교합 환자 중 진단용 모형과 진료기록부가 잘 보존된 3,070명을 대상으로 하여 부정교합의 양상과 내원환자의 분포 및 변화추세를 조사 연구한 결과 다음과 같은 결론을 얻었다. 1. 내원환자의 수는 매년 증가 추세에 있었으며, 남자가 43.5%, 여자가 56.5%로 여자가 남자보다 약 1.3배 더 많았다. 2. 연령별 분포에서 7세에서 12세 군의 내원율이 37.9%로 가장 높게 나타났으며 다음으로는 13세에서 18세 군이 32.0%, 19세에서 24세 군이 19.6%, 25세 이상 군이 7.1%, 0세에서 6세 군이 3.4%으로 가장 낮았다. 3. Hellman 치령별 분포에서 남녀 모두 영구치열의 완성기인 IVa가 54.9%로 가장 높게 나타났다. 4. 내원환자의 거주지 분포에서 광주시내 거주자가 내원환자의 71.0%로 10km이내가 56.3%, 20km이내가 14.7%였다. 5. 내원환자의 주소(chief complaint)별 분포에서 전치부 반대교합이 22.7%로 가장 높게 나타났으며, 하악전돌은 12.6%, 상악전치전돌은 12.2%를 보였다. 6. Angle씨 부정교합 분류별 분포에서 제I급 부정교합이 38.9%, 제 II급 1류 부정교합은 20.7%, 제 II급 2류 부정교합은2.0%, 제III급 부정교합은 38.4%였으며, 남자에서는 제III급 부정교합이, 여자에서는 제I급 부정교합의 비율이 가장 높게 나타났다. 7. 치아의 수직관계이상에 있어서 제II급 1류와 2류 부정교합에서는 과개교합이 24.3%와 56.7%로, 제III급 부정교합에서는 개교합이 21.4%로 가장 높게 나타났다. 8. 골격의 전후방적 부조화에 있어서 제II급 부정교합은 하악골 발육부전으로 인한 경우가 39.3%, 제III급 부정교합은 하악골 과다성장으로 인한 경우가 46.3%로 가장 높게 나타났다. 9. 교정치료시 발치유무에 따른 분포에 있어서 발치 치료는 33.1%, 비발치 치료는 66.9%를 차지하였고, 발치치료 중 38.6%가 상하악 좌우측 제1소구치를 발거하였다. 10. 악교정 수술환자는 매년 계속 증가 추세에 있었으며, 전체 환자의 7.9%가 악교정 수술을 받았다. With socioeconomic development and change of esthetic recognition, the demand for orthodontic treatment and number of orthodontic patients has been increasing so rapidly. And frequency of malocclusion was changed. So this study was done in an attempt to provide an epidemiologic study so that we can accomodate their orthodontic needs adequately and to obtain the reliable quantitative information regarding the characteristics of orthodontic patients. Distribution and trends were examined in 3,070 malocclusion patients who had been examined and diagnosed at Department of Orthodontics, Dental Hospital, Chosun University over 10 year-period from 1990 to 1999. The results were as follows : 1. The number of patients per year was increasing trend and higher visiting rate in female(56.5%) than in male(43.5%). 2. Age distribution had shown 7${\sim}$ 12 year-old group being the largest(37.9%) and each percentage of 13${\sim}$18, 19${\sim}$24, above-19, 0${\sim}$6 year${\sim}$old group was 32.0%, 19.6%, 7.1%, 3.4%. 3. Hellman dental age IVa which is completion of the permanent dentition showed the highest percentage in male and female. 4. Geographic distribution showed a majority of patients in Kwang Ju(71.0%). Group within the distance 10km from Chosun Dental Hospital was 56.3% and group within 20km was 14.7%. 5. Anterior cross bite showed the highest percentage in chief complaints and percentage of Mn. prognathism and protrusion of Mx. teeth was 12.6%, 12.2%. 6. Distribution in the types of malocclusion according to the Angle's classification had shown; 38.9% for Class I, 20.7% for Class II division 1, 2.0% for Class III division 2, 38.4% for Class III. 7. In the dental vertical dysplasia according to the Angle's classification, deep bite was the most frequent in Class II div.1 and div. 2(24.3%, 56.7%) and open bite in Class III(21.4%). 8. In the skeletal sagittal dysplasia, 39.3% of skeletal Class II was due to the undergrowth of the mandible and 46.3% of skeletal Class III was due to the overgrowth of the mandible. 9. Distribution in orthodontic treatment acceding to the extraction and nonextraction had shown 66.9% for nonextraction case, 33.1% for extraction case, and four first bicuspids have been extracted in the highest percentage(38.6%). 10. Patients who had orthognathic surgery comprised 7.9%, with an increasing trend.

대용량 자료와 순차적 자료를 위한 부스팅 알고리즘

윤영주,Yoon, Young-Joo 한국통계학회 2010 응용통계연구 Vol.23 No.1

본 논문에서는 대용량 자료 혹은 시간에 따라 순차적으로 들어오는 자료의 분류를 위한 부스팅(boosting) 알고리즘을 제안한다. 대용량 자료나 순차적 자료의 경우 분석시 모든 훈련 자료(training data)들을 한번에 이용하기 어려우므로 보통의 부스팅 알고리즘은 적절하지 못하다. 이러한 상황을 극복하기 위해 AdaBoost와 Arc-x4와 같은 부스팅 알고리즘을 수정하여 제안한다. 모의 실험과 실제 자료 분석을 통해 대용량 자료나 순차적 자료에 제안된 알고리즘이 잘 적용됨을 보였다. In this paper, we propose boosting algorithms when data are very large or coming in batches sequentially over time. In this situation, ordinary boosting algorithm may be inappropriate because it requires the availability of all of the training set at once. To apply to large scale data or data batch stream, we modify the AdaBoost and Arc-x4. These algorithms have good results for both large scale data and data batch stream with or without concept drift on simulated data and real data sets.

의료기관 종별 만성 치주염 진료의 지역 간 차이

윤영주 ( Young Ju Yoon ),이경수 ( Kyeong Soo Lee ),김창숙 ( Chang Suk Kim ),김창윤 ( Chang Yoon Kim ),황태윤 ( Tae Yoon Hwang ) 한국치위생학회(구 한국치위생교육학회) 2015 한국치위생학회지 Vol.15 No.5

Objectives: This study aimed to investigate the regional difference of chronic periodontal care services in Korea by the analysis of 2010 raw data from Health Insurance Review and Assessment Service. Methods: The subjects were the chronic periodontitis patients over 35 years old from dental care facilities in Korea. The study population was 278,319 including 264,994 claims made by dental clinics, 8,084 by dental hospitals, 3,509 by general hospitals, and 1,732 by tertiary hospitals. Results: There was a significant difference in medical care cost benefit between the provinces(p<0.0001). The age groups showed a clear difference in the patient charge, cost of insurance, and medical care cost benefit(p<0.0001). In consideration of the first visit or revisit, there were differences in the rate of prescription, dental examination, and surgical procedures of the chronic periodontal patients from dental facilities. The radiographic use rate in the tertiary hospitals was 2.6 times higher than that of the dental clinic in the treatment of the new chronic periodontal patients. Conclusions: The use of dental services in the periodontitis is influenced by the types of medical services facility, cost of medical insurance, and patient charge. In consideration of cost benefit analysis, prevention is the most important care for the periodontitis. Regional difference in peridontitis is cause by the use of medical services and quality of treatment.

주한 외국문화원의 언어교육과 세종학당 비교 연구

윤영주 ( Yoon Youngju ) 인하대학교 교육연구소 2016 교육문화연구 Vol.22 No.4

본 논문은 영국, 프랑스, 중국 등의 국가들의 주한 외국문화원 언어교육 정책 현황을 비교 분석하여 세종학당의 과제와 발전 방안을 제시하고 시사점을 도출하는 것을 목적으로 하였다. 이를 위해서 영국의 브리티스 카운실, 프랑스의 알리앙스 프랑세즈, 일본의 일본국제교류기금, 중국의 공자학원을 대상으로 설립배경, 운영현황, 프로그램 등을 살펴보았다. 한국보다 먼저 정책을 시행하여 기관을 설립한 영국, 프랑스, 일본, 중국의 주한 문화원 사례 분석을 통해 각각의 특징을 파악하여 세종학당의 발전을 위한 시사점에 대해 고찰하였다. 세종학당의 운영과 관련하여서는 우선 운영 현황을 살펴보고 문제점을 인식한 후 앞서 외국의 사례를 바탕으로 개선 방안을 도출하고자 하였다. 도출된 개선 방안으로는 첫째, 전문성을 갖춘 강사 양성 및 재교육, 둘째, 현지 문화에 적합한 교재 및 부교재 개발, 셋째, 접근성을 고려한 현지화 전략, 넷째, 한국어 활용 기회의 제공, 다섯째, 충분한 예산의 확보 등을 제시하였다. The purpose of this study is to suggest developmental approaches of Korean language education of King Sejong Institute in terms of cultural diversity, plans and policy, and to find considerations through analyzing, comparing current educational policies of UK, France, China and other overseas countries` cultural centers in Korea. To do this, the purpose of establishment and the operating language education programs are considered as object of following institutes; British Council(U.K.), Alliance Francaise(France), Japan Foundation(Japan) and Confucius Institute(China). These four countries actively enforce language education policies, and also are changing from ethnocentric society into multi-cultural society according to the globalization of capital and labor markets. Korea is also one of such countries. This paper aims to review the current status of the policy directions of Korean language education and suggest good implications for the development of King Sejong Institute by analyzing the cases of cultural centers of U.K., France, Japan and China in Korea, which established the institutes earlier than Korea, understanding advantages and disadvantages of each institute. This study also suggests 5 tactics as managing strategies. First of all, the training and reeducation programs for instructors who need expertise are prepared. Second, textbooks and auxiliary textbooks are developed according to each region and culture area. Third, the localization strategy considering accessibility needs to be established. Fourth, the opportunities of using Korean should be provided. Finally the specific ways to secure proper budget should be prepared.

교합안정장치가 하악과두위치와 두개악안면형태에 미치는 영향

윤영주(Young Jooh Yoon) 조선대학교 구강생물학연구소 1995 Oral Biology Research (Oral Biol Res) Vol.19 No.1

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초등학교 지식경영체제의 선행요인 및 구성요소와의 관계 연구

윤영주 ( Young Joo Yoon ) 한국초등교육학회 2008 초등교육연구 Vol.21 No.3

베트남 유학생의 교우관계 갈등경험에 관한 현상학적 연구

윤영주 ( Young Ju Yoon ),장소영 ( So Young Jang ) 아시아문화학술원 2016 인문사회 21 Vol.7 No.2

본 연구의 목적은 재한 베트남 유학생과 한국 학생 간의 교우관계, 특히 베트남 유학생의 인식과 경험을 통해 느낄 수 있는 어려움을 심층적으로 탐색하고자 하였다. 이를 위해 수도권 사립대학 학부 과정에 재학 중인 베트남 유학생 7명을 대상으로 현상학적 연구를 실시하였다. 연구 결과, 첫째, 의사소통에서의 어려움을 겪으며 대화 기피현상과 스스로 왕따가 되는 소외감과 외로움을 겪고 있었다. 둘째, 교우관계에서 다른 나라 유학생들과의 갈등이었다. 서양권이나 일본 유학생, 중국 유학생에 대해서는 호의적인태도를 보이나 자신들에게는 부정적으로 바라본다고 인식하고 있었다. 셋째, 선후배 관계에 따른 갈등으로 자신보다 나이 어린 선배에게 존댓말을 쓰지 않아 오해를 사며 잦은실수로 인해 점점 교우관계에서 멀어지며 대학생활 적응에 영향을 주는 것으로 나타났다. 넷째, 교우관계에서 발생하는 비용이 경제적인 갈등으로 나타났다. 고향에 있는 가족에 대한 미안함과 죄책감으로 용돈을 스스로 해결하고 있기에 경제적인 부담은 한국 친구와의 적절한 교류를 맺는데 장애요인으로 작용하였다. 다섯째, 베트남 유학생에 대한 낮은 사회적 인식과 편견 등의 문화적 차이가 갈등의 현상으로 나타났다. 때문에 베트남 유학생과 한국 학생와의 관계는 피상적이고 제한적인 접촉관계라는 것을 알 수 있었다. 본 연구는 이러한 연구 결과를 바탕으로 학생들 간 분리되어 있는 현상을 지적하고, 향후 외국인 유학생의 한국 학생과의 교우관계를 지원함으로써 이들 학생들의 교육 및 사회문화적경험의 질을 높이는 대학 국제화가 필요함을 강조하였다. This research intends to investigate and compare peer relationships among Vietnamese students who study in Korea as international students, with domestic Korean students. In particular, the difficulties observed through the author’s empirical study by personally communicating with the aforementioned Vietnamese students will be discussed in depth. The methodology is a qualitative exploration of selected case studies: i.e. seven Vietnamese international students attending private universities in the capital/Seoul region. The research results and conclusions can be summarised under the following five topics. Firstly, it is generally observed that Vietnamese international students tend to experience difficulty in communication, and find it hard to adjust to college life. This sometimes leads these students to avoid conversation in public, which may result in a sense of alienation and loneliness among them. Through being (feeling) isolated from peer relationships, the second result of this research shows that it is often the case that Vietnamese international students choose to suspend or even quit their studies. The third result found in this research is that Vietnamese students tend to get confused by the use of specific social titles among juniors and seniors. This can be seen through frequent lapses of not suitably greeting their seniors using respectful terms, which tends to open up gaps in peer relationships with domestic students in college life. Moreover, the fourth result reveals the difficulties which Vietnamese international students experience with their finances. Because of feeling guilty about having to receive money transferred from their families in Vietnam, they find it hard to maintain normal relationships with Korean friends. Therefore, they sometimes build up peer relationships which are abnormal. Fifthly, insufficient understanding of their situations, together with prejudice and negative opinions toward Vietnamese students by domestic students also places obstacles in the way of forming normal peer relationships with Korean friends. The research aims, if possible, to address the issues which occur in peer relationships between international and domestic students in Korea. On the basis of the above discoveries, this research also seeks to identify ways to improve and facilitate what is needed in international universities in order to provide a richer, securer and more effective social and cultural experience for international students in the future.

근로자의 치아 치면세마 경험에 영향을 미치는 요인

윤영주 ( Young Ju Yoon ),김경원 ( Kyeong Won Kim ),황태윤 ( Tae Yoon Hwang ),이경수 ( Kyeong Soo Lee ) 대한예방치과·구강보건학회 2009 大韓口腔保健學會誌 Vol.33 No.3

Objectives: This study was performed to enhance a rate of tooth scaling and to develop the scalingrelated education material, by analyzing the knowledge attitudes toward and the rates and related factors of tooth scaling. Methods: From September to October 2008, self-administered questionnaires on the knowledge of, attitudes toward and behaviors for tooth scaling were performed, targeting 479 workers(251 men and 228 women) who worked at eight workplace sampled at random of Gyeongsan and Yeongcheon areas in Gyeongsangbuk-do province. Results: Tooth scaling experiences were responded by 328 subjects(68.6 %). One hundred seventy seven subjects(54%) received tooth scaling by self-decision, which shows the highest rate of treatment motives. Non-experience in scaling was responded by 151 subjects(31.4%), 71(47.3%) of whom answered they had no necessity for such treatment. Age and monthly income had significant associations with scaling experiences. The knowledge of scaling showed significant differences in point, depending on age and monthly income, depending on general characteristics. Susceptibility, benefit and cue of action toward their oral health showed significant differences in point between scaling experience and non-experience groups. According to the multiple logistic regression analysis whose dependent variables was tooth scaling experience, significant independent variables were age, education level(reference: junior high schools and lower), income(reference: 3 million won or more), susceptibility, benefit. Conclusions: According to the findings, it is necessary to publicize the necessity of tooth scaling and to encourage people to receive regular scaling treatment by distributing the knowledge indispensible for scaling using the mass media and by causing the changes in the perception of scaling. In addition, the policy is needed to prevent economic constraints from worsening oral health by supporting the poor.