유전자 알고리즘에 기반한 대화식 프랙탈 이미지 생성기

이지애(Ji-Ae Lee),강태원(Tae-Won Kang),김미숙(Mi-Suk Kim) 한국정보과학회 2003 한국정보과학회 학술발표논문집 Vol.30 No.1B

자연의 진화 과정을 모방한 유전자 알고리즘을 이미지 생성기 분야에 적용하여 무한히 다양한 이미지를 생성하는 것은 가능한 반면, 다음 세대에 생성될 이미지들의 예측은 난해하다. 이러한 배경 하에 본 논문에서는 대화식 프랙탈 이미지 생성기를 구현하여, Direct draw mode를 통해 프랙탈 이미지를 생성하기 위해 사용되는 아핀들을 사용자가 직접 변환함으로써 미세 조정이 가능하도록 한다.

농촌 지역 독거노인 주택 유형에 따른 주거취약성 분석

이지애(Ji-Ae Lee),원안나(An-na Won) 한국생활환경학회 2021 한국생활환경학회지 Vol.28 No.6

South Korea has entered an aging society, and it is estimated that 33% of the total elderly population is a elderly single household. Currently, Social problems are emerging such as the death of individual loneliness among the elderly who have lower cognition about the physical environment than the youth in vulnerable housing environment. In particular, the elderly housing in rural areas has a higher rate of aging than in urban areas. If the housing is not improved, the rate of exposure to a more vulnerable housing environment is high. Therefore, the purpose of this study is to investigate the thermal environment of elderly housing in rural areas from September to November in the middle period, and to analyze the vulnerability of housing according to the housing type of elderly housing. In addition, we investigated the actual situation of housing in the elderly districts in rural areas where the safety of the elderly population was not ensured, and analyzed the housing vulnerability of elderly single households according to the level of housing. Based on this, we conducted research to collect basic data for the dissemination and application of devices that can secure a safety system for the elderly single households.

과학영재의 이공계 대학 진로선택에 영향을 미치는 교육적 요인 분석

이지애 ( Ji Ae Lee ),박수경 ( Soo Kyong Park ),김영민 ( Young Min Kim ) 한국과학교육학회 2012 한국과학교육학회지 Vol.32 No.1

The purpose of this study was to investigate the educational factors on career choice of science-gifted students to science and technology bound universities and the difference of perception in regards to group factors. In addition, this study aimed to examine the effects of science-gifted education and critical events in relation to career choice to science and technology bound universities. For the study, 104 university freshmen, 75 males and 29 females, were sampled from UNIST (Ulsan National Institute of Science and Technology), that many science high school graduates entered this year. The survey was conducted with questionnaires to do with the perceptions concerning career choice and educational factors that cause them to choose such career directions. The educational factors on career choice to science and technology bound universities were classified as 3 main categories such as educational environment factor (teaching-learning factor), human factor, attitude towards science factor and the subcategories within each category. The research findings are as follows: First, the factors were closely connected with each other and ``the project centered classes`` were highly interrelated with other educational environment factors such as ``the experiment activity and environment for the activity`` and ``influence of teachers (professors).`` Second, the female students and graduates of the science high school were more positively influenced by the educational environment and human factors on their decision for career than male students and graduates of the general high school. Third, this research found that historical scientific knowledge, perception of scientists` social status and job applications in the science field gave less influence rather than other factors on their decision for career. As a result of examining critical events for science-gifted education in relation to career choice to science and technology bound universities, numerous students mentioned that the extracurricular science activities such as science camps and field trips gave significant effects on students` career choices to science and engineering fields.

A Case Study on Today Scientists’ Problem Finding to Solving Process and Implications for Science-gifted Education

Ji-Ae Lee(이지애),Sunshin Jung(정순신),Youngmin Kim(김영민) 한국영재학회 2018 영재교육연구 Vol.28 No.3

잘 알려진 과학자들의 문제 발견은 당시 과학 현상에 대한 개념이나 이론의 오류 발견, 당시 기술로는 설명될 수 없는 이상한 현상의 발견, 이미 알려진 개념이나 이론으로부터의 비유추론, 새로 발명된 실험 기구 사용에 의한 문제발견, 연구 과제 수행 과정에서의 문제 발견 등의 패턴을 보인다. 또한 문제 해결을 위한 가설 형성 과정에서도 기학학적 모양의 유사성으로부터의 귀추, 기능의 유사성으로부터의 귀추, 성질의 유사성으로부터의 귀추 등으로 정리될 수 있다. 그러나 오늘날의 과학자들은 잘 알려진 과학자들의 문제발견 패턴과는 일부 다른 패턴들을 보이며, 문제 해결 과정에서도 다른 양상을 보이고 있다. 이러한 오늘날의 과학자들이 보이는 문제 발견과 해결 양상은 오늘날의 과학 영재교육에 있어서 도입해야 하는 전략에 시사점을 주고 있다. The problem finding patterns of the well-known scientists are finding from insufficiencies and/or errors in conceptual or theoretical explanation of scientific phenomena at the time, finding by discovering of strange phenomena, which can not be explained by contemporary knowledges at the time, finding by analogy from known concepts or theories to newly assuming concepts or theories, finding while they utilize a newly invented experimental instrument, and finding while they conduct research projects. And their hypotheses were formulated mainly using abductive reasoning, and patterns of abductive reasoning were from similar geometric feature between target domain and source domain, from similar function between them, and from similar properties between them. However, today scientists show a little different pattern from them. And in the process of problem solving, they show different features from the well known scientists. This features of today scientists’ problem finding and solving gives various implications for today science gifted education.

증 례 : 성인 급성 림프모구 백혈병 환자에서 L-아스파라기나제를 포함한 항암화학치료 후 발생한 급성 괴사성 췌장염 1예

이지애 ( Ji Ae Lee ),김효정 ( Hyo Jung Kim ),김재선 ( Jae Seon Kim ),이정민 ( Jung Min Lee ),김지은 ( Ji Eun Kim ),임상윤 ( Sang Youn Lim ),김성민 ( Seong Min Kim ),이연호 ( Yeon Ho Lee ) 대한췌담도학회 2015 대한췌담도학회지 Vol.20 No.4

L-아스파라기나제는 급성 림프모구백혈병 환자에서 사용이 증가하는 약물로, 췌장염은 이 약제의 중요한 합병증 중 하나이며, 항암화학치료 중 이에 대한 주의가 필요하다. 급성 췌장염은 드물지만 치명적 합병증인 괴사성 췌장염으로 진행할 수 있으며 빠른 진단과 적절한 처치가 중요하다. 본 증례는 괴사성 췌장염에 동반된 췌관 누출 그리고 췌장가성낭이 경유듀적 췌관 스텐트 삽입으로 호전되었던 증례이다. 향후 이러한 L-아스파라기나제 유발 췌장염 및 췌관 누출의 치료를 위한 다양한 접근 및 안전성에 대해 추가적인 연구가 요구된다. L-asparaginase is an important component of antileukemic therapy in patients with acute lymphoblastic leukemia. The degree of L-asparaginase toxicity is variable. Several cases of L-asparaginase related pancreatitis have been reported in the literature. However, necrotizing pancreatitis in adult has not been reported yet. Herein, we present a case of necrotizing pancreatitis caused by L-asparaginase that was complicated by pancreatic duct leakage and pseudocyst formation, but successfully treated with percutaneous drainage and octreotide treatment.

전당뇨병 환자에서 ApoB/ApoA-1 Ratio와 비알코올성 지방간과의 연관성

이지애 ( Ji Ae Lee ),장승훈 ( Seung Hun Jang ),민재훈 ( Jae Hoon Min ),김태완 ( Tae Wan Kim ),정우신 ( Woo Shin Jeong ),심충남 ( Choong Nam Shim ),허운제 ( Woon Je Heo ),정미연 ( Mi Youn Jung ),이현아 ( Hyon A Lee ),조용균 ( Yong 대한내과학회 2010 대한내과학회지 Vol.78 No.2

Background/Aims: The apolipoprotein B/A-I ratio (ApoB/A-I) is a powerful clinical indicator of atherosclerosis. Although numerous reports have shown the effect of non-alcoholic fatty liver disease (NAFLD) on cardiovascular disease, few reports have examined the relationship between NAFLD and the ApoB/A-I ratio. The aim of the study was to determine the association between NAFLD and the ApoB/A-I ratio in prediabetic patients. Methods: This cross-sectional study was performed with data obtained from 701 patients (mean age, 47.9±9.6 years) diagnosed with prediabetes. Serum lipid profiles including lipoprotein, apolipoprotein, and calculated ApoB/A-I ratio as well as metabolic syndrome parameters such as fasting glucose and insulin were measured in each subject. Results: Among the 701 patients, 340 (48%) had NAFLD. The number of male patients was 490 (NAFLD+, 276; and NAFLD-, 214). The odds ratios for the prevalence of NAFLD increased according to the quartiles of the ApoB/A-I ratio (1.886, 2.245, and 2.587) (p<0.001). Conclusions: The prevalence of NAFLD correlated with high ApoB/A-I ratio, suggesting that NAFLD increases the risk for atherosclerosis progression in male prediabetic patients. (Korean J Med 78:191-197, 2010)

미세먼지 농도 측정 센서의 퓨전 성능 평가

이지애(Lee Ji Ae),진동섭(Jin Dong Sup),김규호(Kim Kyu Ho) 한국통신학회 2019 한국통신학회 학술대회논문집 Vol.2019 No.6

성인에서 클라츠킨 종양과 비슷한 양상을 보인 미분화 간육종 1예

이지애 ( Ji Ae Lee ),김태완 ( Tae Wan Kim ),민재훈 ( Jae Hoon Min ),변선정 ( Sun Jung Byon ),장승훈 ( Seung Hoon Jang ),최성연 ( Seung Yeon Choi ),김홍주 ( Hong Joo Kim ) 대한소화기학회 2010 대한소화기학회지 Vol.55 No.2

Undifferentiated sarcoma is an uncommon primary malignant tumor of the liver typically occurring in older children. It is also referred to as malignant mesenchymoma, fibromyxosarcoma, or mesenchymal sarcoma. We experienced a case of undifferentiated sarcoma in 72-year-old male. Contrast enhanced liver CT scan revealed a 3.4 cm heterogeneously enhancing, ill-defined, and low attenuated mass in the left liver and subtle intrahepatic duct dilatation. And, in tubogram, there were segmental stenosis and occlusion from the hilum to the proximal common bile duct. We did ultrasonography guided liver biopsy. The pathologic finding revealed infiltrative growth of atypical cells with rhabdoid features. Some atypical cells showed clear cytoplasm, but no organoid pattern was identified. The stroma around atypical cells was filled with eosinophilic hyaline material. These tumor cells were positive for vimentin only, and the tumor was consistent with undifferentiated sarcoma of the liver. (Korean J Gastroenterol 2010;55:144-148)

방사선 조사된 터머릭의 혼합비율에 따른 Photostimulated Luminescence 및 Thermoluminescence 분석 특성

이지애(Ji-Ae Lee),정형욱(Hyung-Wook Chung),권중호(Joong-Ho Kwon) 한국식품과학회 2010 한국식품과학회지 Vol.42 No.6

방사선 조사된 터머릭의 혼합비율에 따른 조사여부 확인을 위하여 물리적 방법(PSL, TL)을 이용하여 검지특성을 분석하였다. PSL 분석 결과, 비 조사시료와 조사시료의 PC<SUB>s</SUB>값이 명확하게 구분되어 방사선 조사여부를 판별할 수 있었으며, 방사선 조사된 원료를 함유한 혼합시료는 1과 10 kGy 조사시료를 0.7% 이상 혼합하였을 때 intermediate 또는 positive의 결과를 나타내어 TL 확인시험으로 조사여부 확인이 가능할 것으로 사료된다. 시료의 TL 분석 결과, 방사선 조사되지 않은 시료는 자연방사선에 의해서 300℃ 부근에서 최고 peak를 가지는 glow curve를 나타낸 반면, 1과 10 kGy 조사구에서는 150-250℃의 부근에서 특유의 glow curve를 나타내었다. TL ratio의 산출 결과 비 조사시료에서는 0.001보다 작은 값을, 조사시료에서는 0.355보다 높은 값을 나타내어 이미 설정한 TL ratio 기준에 따라 조사여부 확인이 가능하였다. 혼합시료의 TL 특성은 glow curve의 온도범위는 조사시료와 동일하게 나타나지만, glow curve의 형태와 intensity는 다소 차이를 보였다. 조사시료를 2% 혼합하였을 때 1 kGy 시료는 비 조사구의 glow curve를 나타낸 반면 10 kGy 시료에서는 조사구 특유의 glow curve를 나타냈다. 그리고 4% 이상 혼합하였을 때에는 1과 10 kGy 시료에서 모두 조사구의 glow curve를 나타내었다. 방사선 조사된 혼합시료의 TL ratio는 0.1 이하의 threshold value를 나타내어 방사선 조사된 혼합시료는 TL glow curve 형태와 온도범위로서 방사선 조사 여부를 확인할 수 있었다. This study was performed to investigate PSL and TL characteristics for the detection of different ratios of gamma-irradiated turmeric. It was possible to determine PSL and TL of 1- and 10-kGy irradiated turmeric. The TL ratios (TL<SUB>1</SUB>/TL<SUB>2</SUB>) of non-irradiated samples were lower than 0.001, while those of irradiated samples were higher than 0.355. In the PSL results, blended samples containing irradiated ingredients showed intermediate values for a 1% blending rate. Furthermore, TL analysis of blended samples seems to offer a promising method for irradiation identification by TL glow curve form and temperature range. The 1- and 10-kGy irradiated samples were able to be detected above a 4% blending rate. However, the TL ratio appeared as a threshold value below 0.1 for irradiated samples. Overall, TL analysis identified 4% blended samples containing gamma-irradiated turmeric.

증 례 : 위에서 발견된 함몰증식성 폴립 1예 보고 및 문헌고찰

이연호 ( Yeon Ho Lee ),주문경 ( Moon Kyung Joo ),이범재 ( Beom Jae Lee ),이지애 ( Ji Ae Lee ),김태현 ( Taehyun Kim ),윤진구 ( Jin Gu Yoon ),이정민 ( Jung Min Lee ),박종재 ( Jong Jae Park ) 대한소화기학회 2016 대한소화기학회지 Vol.67 No.2

An inverted hyperplastic polyp (IHP) found in stomach is rare and characterized by downward growth of hyperplastic mucosal component into the submucosa. Because of such characteristic, IHP can be misdiagnosed as subepithelial tumor or malignant tumor. In fact, adenocarcinoma was reported to have coexisted with gastric IHP in several previous reports. Because only 18 cases on gastric IHP have been reported in English and Korean literature until now, pathogenesis and clinical features of gastric IHP and correlation with adenocarcinoma have not been clearly established. Herein, we report a case of gastric IHP which was initially misdiagnosed as gastrointestinal stromal tumor and resected using endoscopic submucosal dissection. Literature review of previously published case reports on gastric IHP is also presented.