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장력 On-line계측의 사절 현상 해석에의 응용-단경사 장력 최대치의 분포-
김선욱,허유,우제린,Kim, Sun-Wook,Huh, You,Woo, Jae-Lin 한국섬유공학회 1990 한국섬유공학회지 Vol.27 No.12
The yarn tension during weaving process has a significant influence on the product quality and production efficiency of woven fabric. On considering the yarn breakage rate in weaving, the analysis and prediction of yarn tension are very important. Pattern of variation in warp tension, at a given location on loom, with time under a certain specific boundary condition provides a vital piece of information for the analysis of yarn breakage rates. In the present work, variation in yarn tension was measured on a group of warp during weaving, and an attempt was made to extract some information on the variation of the extreme tension acting on the single warp yarns from the experimental results. From the experiments and loading model for a yarn group, it can be concluded that the ergodicity of warp yarn tension in weaving process is unlikely to be valid. The tension peak with respect to time has the characteristics of the normal distribution, while the tension on the ensemble basis has shown to be the Weibull distibution.
정상 한국 성인에서 혈청 암태아성항원의 경계치 및 이에 영향을 미치는 인자
김선욱,정준기,이동수,곽철은,정재민,김명기,이명철,고창순,이형기,유근영,안윤옥,김종순 ( Sun Wook Kim,June Key Chung,Dong Soo Lee,Cheol Eun Kwark,Jae Min Jeong,Myung Ki Kim,Myung Chul Lee,Chang Soon Koh,Hyung Kee Lee,Keun Young Yoo,Yoon Ok 대한핵의학회 1994 핵의학 분자영상 Vol.28 No.3
Carcinoembryonic Antigen is one of most frequent.ly checked tumor markers in cancer management. We performed statistical analysis with serum CEA data of 2626 persons who received regular health examination and were thought to be free of active disease to determine the cutoff values of serum CEA level in normal Korean adults and to study the factors influencing serum (:EA levels in normal subjects. 1) The cutoff values of serum CEA in normal Korean adults in general were 9.28ng/ ml for men, 5.90 ng/ml for women. 2) Serum CEA level was influenced by age, present smoking history, sex, and abnormal findings in chest X ray. 3) Serum CEA level had no correlation with the history of amount of alcohol consumption or obesity. 4) Cutoff values of serum CEA in normal Korean adults were tabulated according to age, sex, and smoking histor y. Serum CEA level was influenced by age, sex, present smoking history and abnormal findings in chest X ray and cutoff values of serum CEA were tabulated according to age, sex, and smoking history.
LDA와 BERTopic을 이용한 토픽모델링의 증강과 확장 기법 연구
김선욱,양기덕,Kim, SeonWook,Yang, Kiduk 한국정보관리학회 2022 정보관리학회지 Vol.39 No.3
The purpose of this study is to propose AET (Augmented and Extended Topics), a novel method of synthesizing both LDA and BERTopic results, and to analyze the recently published LIS articles as an experimental approach. To achieve the purpose of this study, 55,442 abstracts from 85 LIS journals within the WoS database, which spans from January 2001 to October 2021, were analyzed. AET first constructs a WORD2VEC-based cosine similarity matrix between LDA and BERTopic results, extracts AT (Augmented Topics) by repeating the matrix reordering and segmentation procedures as long as their semantic relations are still valid, and finally determines ET (Extended Topics) by removing any LDA related residual subtopics from the matrix and ordering the rest of them by F<sub>1</sub> (BERTopic topic size rank, Inverse cosine similarity rank). AET, by comparing with the baseline LDA result, shows that AT has effectively concretized the original LDA topic model and ET has discovered new meaningful topics that LDA didn't. When it comes to the qualitative performance evaluation, AT performs better than LDA while ET shows similar performances except in a few cases.
국내 물 자원 통계자료 분석을 통한 물발자국 방법론 국내 적용 가능성 확인 연구
김선욱,조서원,안재현,이한웅,연성모,Kim, Sun Uk,Jo, Seo Weon,Ahn, Jae Hyun,Lee, Han Woong,Yeon, Sung Mo 한국청정기술학회 2018 청정기술 Vol.24 No.2
물발자국은 EU가 추진하고 있는 자원효율적인 유럽을 위한 로드맵(Roadmap to a Resource Efficient Europe)을 바탕으로 제시된 친환경제품 시장통합정책(Single Market for Green Product initiative)의 중요한 구성요소이다. 2014년 7월 EU 회원국의 주도로 물발자국 산정 국제표준(ISO 14046)이 제정되었으며 우리나라도 한국산업표준(KS I ISO 14046)으로 2015년 4월 부합화를 완료하였다. 국제표준(ISO 14046)에 기반을 둔 인증제도가 도입되는 경우, 기반을 갖추지 못한 인도, 베트남 등의 개도국에게는 수출시 무역장벽이 될 수 있으므로 우리나라는 이를 역이용하기 위한 전략을 수립해야 한다. 한편, 물발자국은 전과정평가(LCA)를 적용한 유사 발자국(예, 탄소발자국)인증과 비교할 때 국지적(Local) 환경영향을 고려하도록 되어 있어, 우리나라에서 생산 및 제조되는 제품들은 우리나라 수역에 미치는 영향을 고려해야 한다. 따라서 물발자국 산정방법은 국내외 호환을 위해 표준에 적합해야 하며, 우리나라의 물 환경을 고려하기 위해서 우리나라 적합한 물발자국 산정계수들의 도출이 필요하다. 이를 위해 이 연구에서는 국제표준을 바탕으로, 현재 국내 외에서 진행된 물발자국 산정연구를 검토하고 국내 기존 물 자원 관련 통계자료 분석을 통해 물발자국 방법론의 국내 적용 가능성을 확인하였다. The water footprint is an important component of the Single Market for Green Product initiative based on the EU's Roadmap to a Resource Efficient Europe. In July 2014, the EU has established the International Standard for Water Footprint (ISO 14046) and Korea has complied with the Korean Industrial Standard (KS I ISO 14046) in April 2015. If a certification system based on the international standard (ISO 14046) is introduced, developing countries such as India and Vietnam, which are not equipped with bases, can become a trade barriers in exporting, so Korea should establish a strategy to reverse them. On the other hand, water footprints are designed to take into account local environmental impacts when compared to similar footprints (eg, carbon footprint) using LCA, so that products manufactured and manufactured in Korea will have an impact on domestic waters Should be considered. Therefore, the method of the water footprint should conform to the standard for compatibility with other countries. In order to consider the domestic water condition, it is necessary to identify suitable indicator or factor for estimating water footprint on Korea. For this purpose, this study analyzed the water footprint estimation study conducted at domestic and foreign based on international standards and through the analysis of statistical data related to domestic water resources, we confirmed the applicability of the water footprint methodology in Korea.
인공신경망을 이용한 Dynamic positioning 선박의 전력부하 예측
진성훈(Sung Hoon Jin),홍창우(Chang woo Hong),김상현(Sang Hyun Kim),허견(Kyeon Hur) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.4
본 논문은 딥러닝을 통해 Dynamic Positioning 선박의 전력 사용량을 예측하였다. CNN (Convolutional neural networks), LSTM(Long short-term memory) 알고리즘을 통해 풍향 속, 주요 장비 부하량을 학습하여 5분 뒤 전력 부하를 예측하였고, CNN과 LSTM 알고리즘의 단독, 혼합 사용에 따른 예측 결과를 비교하여 정확성을 검증하였다.
삼음교(三陰交)(SP<sub>6</sub>)·족삼리(足三里)(ST<sub>36</sub>) 백복령약침(白茯笭藥鍼)이 만성 스트레스 모델 흰쥐에 미치는 영향
김선욱,김재홍,조명래,신정철,Kim, Seon Wook,Kim, Jae Hong,Cho, Myoung Rae,Shin, Jeong Cheol 대한침구의학회 2015 대한침구의학회지 Vol.29 No.5
Objectives : The purpose of this study is evaluating the effect of Poria cocos pharmacopuncture (PCP) at $SP_6$(Sameumgyo) and $ST_{36}$(Joksamni) on chronic stress model(CSM) rats. Methods : The experimental rats were assigned to five groups: normal, CSM(control), PCP1X, PCP2.5X and PCP5X. The experimental rats in CSM(control), PCP1X, PCP2.5X and PCP5X were put through a timetable to cause CSM. PCP($20{\mu}l$) was administered at $SP_6$, $ST_{36}$ to groups PCP1X, PCP2.5X and PCP5X once every three days for a total of six times. The weight of the rats was measured by an electronic scale after PCP injection, once every three days for a total of six times. Blood samples were taken from the rats for analysis of aspartate aminotransferase(AST) and alanine aminotransferase(ALT). Serotonin and norepinephrine were measured by enzyme-linked immunosorbent assay(ELISA) kit. Results : The experimental groups(PCP1X, 2.5X, 5X) showed significant body weight increase compared to the control group. Regarding AST and ALT changes in serum, the experimental groups(PCP2.5X, 5X) showed a significant decrease compared to the control group. For Serotonin changes in serum, the experimental group(PCP5X) showed a significant increase compared to the control group. For Norepinephrine changes in serum, the experimental groups(PCP2.5X) showed a significant decrease compared to the control group. Conclusions : These data suggest that PCP at $SP_6$, $ST_{36}$ has therapeutic effects on CSM rats.