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GAN 적대적 생성 신경망과 이미지 생성 및 변환 기술 동향
조영주,배강민,박종열,Jo, Y.J.,Bae, K.M.,Park, J.Y. 한국전자통신연구원 2020 전자통신동향분석 Vol.35 No.4
Recently, generative adversarial networks (GANs) is a field of research that has rapidly emerged wherein many studies conducted shows overwhelming results. Initially, this was at the level of imitating the training dataset. However, the GAN is currently useful in many fields, such as transformation of data categories, restoration of erased parts of images, copying facial expressions of humans, and creation of artworks depicting a dead painter's style. Although many outstanding research achievements have been attracting attention recently, GANs have encountered many challenges. First, they require a large memory facility for research. Second, there are still technical limitations in processing high-resolution images over 4K. Third, many GAN learning methods have a problem of instability in the training stage. However, recent research results show images that are difficult to distinguish whether they are real or fake, even with the naked eye, and the resolution of 4K and above is being developed. With the increase in image quality and resolution, many applications in the field of design and image and video editing are now available, including those that draw a photorealistic image as a simple sketch or easily modify unnecessary parts of an image or a video. In this paper, we discuss how GANs started, including the base architecture and latest technologies of GANs used in high-resolution, high-quality image creation, image and video editing, style translation, content transfer, and technology.
[ITS부문] 차량충돌 회피 시스템을 위한 비선형 브레이크 제어
조영주(Y.J.Cho),이경수(K.S.Yi) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents a nonlinear brake control for vehicle collision avoidance(CA) system. For the control of a brake system. we introduced a solenoid valve controlled brake actuator and a hydraulic brake system. To minimize driver discomfort during braking in a CA system. it is important to have the acceleration profile as smooth as possible. The proposed nonlinear brake control technique has been compared to a simple CA algorithm which use on/off binary brake control.
김광영(K.Y. Kim),김동수(D.S. Kim),최병오(B.O. Choi),조영주(Y.J. Cho),하종식(J.S. Ha) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
A single-piece-machined-part has superior characteristics to an assembly of several pieces of part especially for aircraft components. It is neccesary to develop high efficient 'multi-head router machine' for machining a large size single-piece-part on a large scale. In this type machine, many cutting chips are generated. These chips should be removed automatically for productivity and part precision. In this research, cutting chip collecting apparatus for 'multi-head router machine' was designed. A suction-type-blower (20 HP, Δp3,000㎜Ag), which was attached to the machine tool directly, was very effective.
자동혈액응고 기가에서 PT, APTT 의 측정결과 비교분석 -< Fibrintimer and Electra-800>
이귀순 ( K S Lee ),박미영 ( M Y Park ),이혜란 ( H R Lee ),조영주 ( Y J Cbo ),정은경 ( E K Jung ),최종태 ( J T Choi ) 대한임상검사과학회 1992 대한임상검사과학회지(KJCLS) Vol.24 No.1
The Prothrombin time(P.T) test and activated partial thromboplastin time(APTT) test are commonly used for screening coagulation disorders and monitoring of anticoagulant therapy. We compared day to day reproducibility and normal range and coefficient of correlation of Fibrintimer and Electra-800 in PT. APTT. The results are : 1. Day-to-day reproducibility of PT and APTT expressed C.V. are 4.02%, 6.23% in Fibrintimer and 2.26%, 4.37% in Electra-800, which show good day to day reproducibility(P > 0.05). 2. The normal range of PT are 9.7 sec~ 13.3 sec in Fibrintimer and 10.1 ~ 13.3 sec, in ElectraBOO. The normal range of APTT are 26.8 sec ~34.2 sec in Fibrintimer and 25.3 sec~33. 5 sec in Electra-·800. 3. A coefficient of correlation of PT & APTT is 0.99 and 0.91 respectively between the Fibrintimer & Electra-800 which show high degree of correlation.
만성 육아종성 질환에서의 Stimulated N. B. T. 검사
이귀순 ( K S Lee ),이혜란 ( H R Lee ),조영주 ( Y J Cho ) 대한임상검사과학회 1991 대한임상검사과학회지(KJCLS) Vol.23 No.1
Colorless nitro blue tetrazolium (N. B. T.) is reduced to a water-insoluble formazan which can easily be recognized as a deep blue deposit in cytoplasm. Although the mechanism of reduction of N. B. T. to form formazan in phagocytic neutrophils is uncertain. Park et al. reported that the number of meutrophils reducing N . B. T. dye invitro was significantly elevated in patients with acute systemic bacteria infection. Park also introduced a simple technique testing intrinsic defect of neutrophils to phagocytize and kill bacteria. When N. B. T. values are not increased in the presenee of acute bacterial infection by observing significant rise in N. B. T. positive neutrophils when Escherichia coli endotoxin is added in vitro. Chronic granulomatous disease (C. G. D.) results from a failure of patients phagocytic cells to kill ingested bacteria. The result``s of theN .B. T test in C.G.D. patients was false negative. So the present study was performed to stimulated N. B. T. test by endotoxin. The result``s of the S-N .B. T. test in C.G.D. patients and his father and his mother and his brother and health person are as followings : 1. The percentage of N . B. T. positive neutrophils was 0% in C. G. D. patients. 2. The percentage of N. B. T. positive neutrophils was 100% in his father, his brother, healthy person (control) 3. The percentage of N . B. T. positive neutrophils was 60% in his mother. The S-N. B. T. test would be diagnostic value in patients suspected of having C. G. D. which can not be killed bacteria by neutrophils.
급성 천식발작시 혈장 및 요중 Endothelin 농도 변동
장중현 ( Jung Hyun Chang ),신태림 ( Tae Rim Shin ),우가은 ( Ga Eun Woo ),김종선 ( Jong Seon Kim ),홍은순 ( Eun Soon Hong ),서기열 ( Gi Yeoul Seo ),차주현 ( Joo Hyun Cha ),김미선 ( Mi Seon Kim ),김영선 ( Yeung Seon Kim ),조영주 ( Y 대한결핵 및 호흡기학회 1997 Tuberculosis and Respiratory Diseases Vol.44 No.4
양성유방 질환과 유방암 잔여 유방조직의 상피세포 증식에 대한 비교연구
유채섭,조영주 이화여자대학교 의과대학 1981 梨花醫學誌 Vol.- No.13
For many years there have been publications of regarding the possible relationship of benign breast lesions to the subsequent occurrence of cancer. Recently there have been presented the atypical lesions as precancerous lesion of the breast. For this interesting reasons, the histopathological study of ductal and lobular cell proliferations, which are thought to have relationship with atypical lesions, was performed to compare with the frequency of ductal and lobular cell proliferations in the benign breast lesions and in the remaining breast tissues of cancer for 5 years from 1976 to 1981 in Ewha Womans University Hospital. The peak age of prtients of breast carcinoma was 40∼49 years, and that of benign was 20∼29 years. In a total 111 cases of benign breast lesions, ductal cell proliferations with moderate to severe degree was present in 64% of adenosis, 50% of fibroadenoma and 0% of fibrosis. Meanwhile, in a total 25 cases of remaining breast tissues of carcinoma, ductal cell proliferations of same degree subgroups in breast carcinoma in this study. Severe degree of ductal cell proliferations were found in 15% of the benign breast lesions and in 32% of the remaining breast tissues of cancer. It ductal cell proliferations comparing with benign breast lesions. Although the lobular cell proliferations was more frequently found than benign breast lesions, it was not so significant in both benign and remaining breast tissues of cancer. It is not certain that ductal cell proliferations of the breast is definitely precancerous findings with this limited study, but it can be assumed that this is probably related to atypical lesions, that is thought to be precancerous and that a special attention for both pathologists and surgeons should be necessary.