특징 선택과 서포트 벡터 머신을 활용한 에너지 절도 검출

이지영,선영규,이승우,김진영,Lee, Jiyoung,Sun, Young-Ghyu,Lee, Seongwoo,Kim, Jin-Young 한국인터넷방송통신학회 2021 한국인터넷방송통신학회 논문지 Vol.21 No.5

전력 그리드 시스템이 ICT 기술의 발달로 지능화됨에 따라 그리드에 연결된 사용자의 전력 사용량 정보를 획득하고 분석할 수 있게 되었다. 본 논문에서는 스마트 그리드에서 경제적 손실을 일으키는 주된 원인인 에너지 절도 문제를 특징 선택과 서포트 벡터 머신을 이용해서 해결한다. 본 논문에서 제안하는 시스템의 데이터 전처리 과정은 다섯 단계다. 전처리 단계에서 필터링 기반 특징 선택 방법인 분산 분석 기반 방식과 상호의존정보 기반 방식을 활용해 특징을 선택한다. 시뮬레이션 결과 입력 데이터의 특징을 그대로 이용하는 것보다 상호의존정보 기반 특징 선택을 이용하면 적은 입력 특징을 이용해 서포트 벡터 머신 기반 분류기로부터 더 높은 분류 성능을 얻어 낼 수 있다.

주성분 분석을 이용한 펄스형 전자기장 자극을 통해 DNCB로 유발된 아토피성 피부염의 개선 효과 분석

이지영,김준영,이예린,김고은,이용흠,양세정,Lee, Jiyoung,Kim, Jun-Yong,Lee, Yerin,Kim, Ko Eun,Lee, Yongheum,Yang, Sejung 대한의용생체공학회 2021 의공학회지 Vol.42 No.3

Atopic dermatitis (AD), a chronic inflammatory skin disease, is characterized by itchy and age-dependent lesions. Previous studies have shown that pulsed electromagnetic field (PEMF) significantly improved chronic ulcers and ununited fractures, providing an evidence for the application of PEMF in resolving inflammation caused by AD. This study investigated the anti-inflammatory effect of PEMF on DNCB-induced AD in animal models. Five male hairless mice (6 weeks old) per group were assigned to a normal group, a sham group, and two PEMF groups (15Hz, 75Hz). Mice were treated with 2,4-Dinitrochlorobenzene (DNCB) to induce uniform AD among all groups excluding a normal group. To examine the inflammatory progress and the improvement of AD after the PEMF stimulation, images are taken with various cameras for non-invasive evaluation and the results are expressed using principal component analysis (PCA) for visualization. The results of this study demonstrated that PEMF effectively improved skin lesions without the use of drugs.

마커 제어 워터셰드와 타원 적합기법을 결합한 다중 교모세포종 분할

이지영,정다은,이현우,양세정,Lee, Jiyoung,Jeong, Daeun,Lee, Hyunwoo,Yang, Sejung 대한의용생체공학회 2021 의공학회지 Vol.42 No.4

In order to analyze cell images, accurate segmentation of each cell is indispensable. However, the reality is that accurate cell image segmentation is not easy due to various noises, dense cells, and inconsistent shape of cells. Therefore, in this paper, we propose an algorithm that combines marker-based watershed segmentation and ellipse fitting method for glioblastoma cell segmentation. In the proposed algorithm, in order to solve the over-segmentation problem of the existing watershed method, the marker-based watershed technique is primarily performed through "seeding using local minima". In addition, as a second process, the concave point search using ellipse fitting for final segmentation based on the connection line between the concave points has been performed. To evaluate the performance of the proposed algorithm, we compared three algorithms with other algorithms along with the calculation of segmentation accuracy, and we applied the algorithm to other cell image data to check the generalization and propose a solution.

데이터마이닝과 학습기법을 이용한 부동산가격지수 예측

이지영,유재필,Lee, Jiyoung,Ryu, Jae Pil 한국융합학회 2021 한국융합학회논문지 Vol.12 No.8

With increasing interest in the 4th industrial revolution, data-driven scientific methodologies have developed. However, there are limitations of data collection in the real estate field of research. In addition, as the public becomes more knowledgeable about the real estate market, the qualitative sentiment comes to play a bigger role in the real estate market. Therefore, we propose a method to collect quantitative data that reflects sentiment using text mining and k-means algorithms, rather than the existing source data, and to predict the direction of housing index through artificial neural network learning based on the collected data. Data from 2012 to 2019 is set as the training period and 2020 as the prediction period. It is expected that this study will contribute to the utilization of scientific methods such as artificial neural networks rather than the use of the classical methodology for real estate market participants in their decision making process.

현대영화 몽타주의 '파편화(fragmentation)' 경향 연구

이지영,LEE, Jiyoung 성균관대학교 트랜스미디어연구소 2017 트랜스- Vol.3 No.-

The film scholar Vincent Amiel divides into three types of montage through his book The Aesthetics of Montage ; Montage narratif, Montage discursif, and Montage decorrespondances. These three categories are the concept that encompasses the aesthetic class to which most movies belong. Early films pursued the essential and basic functions of editing, which tend to be modified in the direction of enhancing the director's goals over time. In this way, "Expressive Montage" is one of most important concepts of montage, not as a 'methodology' that combines narrative but as a 'purpose'. In the montage stage, the expressive montage work is done through three steps of decision. The process of 'combining' to combine the selected films in a certain order, after the process of 'selection' which selects only necessary parts of the rush film, and 'connection' to determine the scene connection considering the duration of the shot. The connection is the final stage of the montage. There are exceptions, of course. When fiction films of classical narratives use close-ups, or when using models or objects of neutered animals, the film induces the tendency of a "montage decorrespondances" rather than a "montage narratif" or "montage discursif". This study attempts to analyze the tendency of montage of works with 'uncertain connection' through 'collage' used by close-ups and montage decorrespondances as 'fragmentation tendency of modern films'. The fragmentation of the montage in contemporary film breaks the continuous and structural nature of the film, and confuses the narration structure that is visible on the surface of the film. The tendency of the fragmentation of the montage, which started from this close-up, seems to give an answer to the extensibility of the modern image.

피사계 심도가 서로 다른 영상을 이용한 All-in-focus 영상 생성 알고리즘

이지영(Jiyoung Lee),이세나(Sena Lee),이현우(Hyunwoo Lee),이중빈(Jungbin Lee),장승현(Seunghyun Jang),김태한(Taehan Kim),김기현(Kihean Kim),양세정(Sejung Yang) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8

영화의 경계: 영화와 역사적 기억

이지영 ( Lee Jiyoung ) 한국비교문학회 2017 比較文學 Vol.0 No.72

본 논문은 `영화란 무엇을 할 수 있는가`라는 실천적 물음을 통해 영화란 무엇인가에 대한 하나의 가능한 대답을 시도하고자 한다. 첫 번째로는 애도의 작업으로서의 영화의 새로운 역할을 제안한 박찬경 감독의 다큐멘터리 <만신>이 어떤 방식으로 영화적 애도를 수행하고 있는지를 영화의 시간적 존재론의 차원을 기반으로 분석한다. 영화매체와 굿 사이의 시간적 차원의 친연성에 대한 분석을 바탕으로, <만신>이 채택하고 있는 이미지 전략들(극재연, 푸티지, 어트랙션 이미지, 상이한 이미지들 활용 등)이 어떤 방식으로 영화적 애도의 형식으로 작동되고 있는지를 분석한다. 이러한 분석들을 통해 각 전략들이 관객으로 하여금 무당의 상이한 존재 방식을 인정, 다른 실재의 수용, 영화-굿에의 참여라는 단계들을 거쳐 이 영화 내부로 연루시킨다는 점을 밝힌다. 그리고 이러한 애도의 과정을 `공감화`라는 개념의 제안을 통해 정식화한다. 이 영화가 작동시키는 `공감화` 과정은 <만신>이 관객의 참여에서 나아가 관객의 실천적인 행위를 요구한다는 점을 드러내어 준다, 따라서 본 논문에서는 영화가 역사적 기억을 불러와 관객에게 제시함으로써 과거에 대한 재해석의 기회를 제공하고, 그를 통해 미래를 변화시키려 하는 영화의 실천적인 역할의 한 사례에 대해 살펴본다. This study tries to provide a possible answer to “What is Cinema?” by way of answering to the practical question of “What can Cinema do?”. The object of this essay is Ten Thousand Spirits, which proposes a new function of cinema as a work of mourning, by a Korean filmmaker and artist Chankyong Park. Firstly, I analyse how the film performs a cinematic mourning on the basis of the temporal dimension of cinematic ontology. Starting from the analysis of the temporal affinity between film and the shamanic ritual, gut, secondly, I look at the image strategies that this documentary adopts, such as, reenactment, footage, attraction images, and diverse images, in order to examine how the strategies function as forms of cinematic mourning. Thirdly, this study reveals that these strategies make the spectator follow three stages of “acknowledgement”, “acceptance” of the different reality of the shaman, Kim Keumhwa, and “participation” into the film-gut. This staged process of cinematic mourning is synthesised as “Sympathisation” which necessarily involves the viewer in the film. This process of sympathisation requires the viewer to do a praxis further beyond their participation. Thus, this essay examines an example of one practical role of cinema which provides a chance of reinterpretation of the past in order to change the future by recalling historical memory into present screen.

북한이탈주민 직장적응 실태 분석과 제언

이지영 ( Lee Jiyoung ),최경원 ( Choi Kyongwon ) 대한정치학회 2021 대한정치학회보 Vol.29 No.1

For North Korean defectors, a successful settlement in South Korea is a stable job involving workplace adaptation. For most North Korean defectors, however, stable employment and work life are only a long way off. The employment rate of North Korean defectors is still low, and the government's employment support policy is diversifying and improving, but the satisfaction level of social adaptation education and work life felt by North Korean defectors is not sufficient. Prejudice and discrimination against North Korean defectors exist in the South Korean labor market, and North Korean defectors are still in many difficulties in settling in South Korean society. Therefore, the purpose of this study is to analyze the causes of North Korean defectors' failure to adapt to work and present solutions. This study is different from other existing studies by simultaneously analyzing the evaluation of North Korean defectors from the perspective of employers and the status of North Korean defectors' employment at work. Based on the results of these analyses, four directions are presented to improve the government's policy to support North Korean defectors' settlement for stable employment and workplace adaptation. First, social adaptation and workplace adaptation education at North Korean Refugee Settlement Support Office should lead to job adaptation education centered on field experience that suits the aptitude and ability of North Korean defectors, and should be conducted as a step-by-step customized course for re-socialization for a sufficient period. Second, by strengthening the responsibilities and roles of the Ministry of Employment and Labor and the Korea Industrial Manpower Corporation, vocational training institutions should provide customized vocational technology education to help North Korean defectors live on their own. Third, the government, local governments, civic groups, and North Korean Refugee Settlement Support Office should establish cooperative governance to help North Korean defectors receive online and offline education systematically from the perspective of lifelong education in terms of social adaptation education, political system education, and economic management education necessary for actual employment and settlement. Fourth, stable jobs should be created continuously by expanding employment opportunities for North Korean defectors and rebuilding the employment support system.

코로나 시대 대학생활 기대충족에 영향을 미치는 대학교육서비스 요인 탐색 : 학위유형 및 입학시기별

이지영(Jiyoung Lee),이선희(Sunhee Lee),김덕파(Dukpa Kim) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.16

목적 이 연구는 코로나 시대 학생들이 인지하는 대학교육서비스 요인들의 품질과 입학 전 기대생활에 미치는 영향을 학위유형과 입학시기에 따라 분석함으로써 대학교육 운영과 개선의 방향을 제시하는 데 목적이 있다. 방법 이를 위하여 대학생활 기대충족에 미치는 대학교육서비스 요인으로 학교시설, 수업인프라, 전공교과체계, 교수학습, 행정지원, 비교과 프로그램을 선정하여, 2020년도 2학기 종료시점에 K대학교 재학생 4,630명을 대상으로 설문조사를 실시하고 데이터를 분석하였다. 결과 연구결과 첫째, 대학생의 기대충족에 영향을 미치는 대학교육서비스 요인으로 전공교과체계, 교수학습, 비교과 프로그램, 학교시설, 행정지원, 수업인프라가 유의하였다. 둘째, 학위유형별로 학부생은 모든 요인이, 석사과정생은 전공교과체계, 교수학습, 비교과 프로그램, 학교시설이, 박사과정생은 교수학습, 전공교과체계가 유의하였다. 입학기시별로 신입생은 전공교과체계, 교수학습, 행정지원, 수업인프라가, 상급생은 모든 요인이 유의하였다. 결론 대학생들의 기대충족을 증진하기 위해서는 대학의 본원적 역할인 교육과정에 대한 체계적인 지원이 중요하며, 물리적 환경에 대한 투자와 관리, 학생 특성을 고려한 교육서비스 제공과 지원이 필요하다. Objectives The purpose of this study is to suggest the direction of university education management and improvement by analyzing the relationship between the quality of university education service factors and students’ fulfillment of expectations in the Corona era, by degree and year of entrance group. Methods To this end, school facilities, administrative support, class infrastructure, major curriculum, teaching, and comparative program are selected as potential factors that affect students’ fulfillment of expectations on college life. Survey data, collected from 4,630 enrolled students of K University, are analyzed. Results All selected factors are statistically significant for the fulfillment of expectations on college life in the order of major curriculum, teaching, comparative program, school facilities, administrative support, and instructional infrastructure. When each degree group is separately analyzed, all factors are significant for undergraduates; major curriculum, teaching, comparative program and school facilities are significant for Master s students; and teaching and major curriculum are significant for PhD students. When students who entered in 2020 and prior to 2020 are separately analyzed, only major curriculum, teaching, comparative program and instructional infrastructure are significant for the group of 2020 entrance while all factors are significant for the other group. Conclusions It is important to first improve educational capacity, to manage school facilities, and to provide educational service in consideration of student characteristics.

키워드 네트워크 분석을 통한 보육교사 소진 관련 연구동향 분석

이지영(Jiyoung Lee),김성원(Sungwon Kim) 학습자중심교과교육학회 2019 학습자중심교과교육연구 Vol.19 No.24

본 연구는 국내 학술지에 게재된 보육교사의 소진 관련 논문의 연구동향을 키살펴봄으로써 연구주제의 변화와 뱡향을 제시하고자 수행되었다. 이를 위하여 2005년에서 2019년 8월까지 한국연구재단의 등재지와 등재후보지에 게재된 보육교사 소진관련 학술지 논문의 키워드에 대해 네크워크 분석을 하였다. 연구절차는 분석대상논문 선정, 키워드 추출 및 코딩, 키워드 네트워크 구축, 키워드 네티워크 분석 및 시각화 과정 순이고, Textom 프로그램을 활용하여 자료를 처리하였다. 본 연구의 결과는 다음과 같다. 첫째, 2005년에서 2019년 8월까지 총 105편의 논문이 학술지에 게재되었으며, 한국영유아보육학 에 가장 많은 논문이 게재된 것으로 나타났다. 둘째, 키워드는 심리적 소진 이 가장 높은 빈도를 보였으며 사회적 지지 , 직무만족 , 직무스트레스 등의 순으로 높은 빈도가 나타났다. 셋째, 키워드 연결 정도 중심성 분석 결과 심리적 소진 이 가장 높게 나타났다. 본 연구는 보육교사 소진 관련 연구동향을 알아보고 보육교사 소진과 관련한 후속연구의 방향성을 제시한 점에 의의가 있다. This study examines the research trends of childcare teacher’s burnout published in domestic journals, using keyword network analysis. Articles on childcare teacher burnout, certified by the National Research Foundation of Korea, were analyzed by year. The study was conducted, in order: selecting which journals were to be analyzed, extracting and coding the keywords, establishing a keyword network, analyzing and visualizing a keyword network. It was found that 105 articles were published from 2005 to August 2019, and most frequently articles were published in Korea Journal of Child Care and Education. The occurrences of keywords in childcare teacher’s burnout articles were, in descending order: psychological burnout, social supports, job satisfaction, job stress. Through the analysis of the centrality degree of keywords, psychological burnout appeared most often. This study is significant in that, based on the systematic analysis of research trends, it suggests the future direction of childcare teacher’s burnout studies.