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조경수,유정현,서정수,유경하,홍기숙,김학진,Cho, Kyung-Soo,Yoo, Jeong-Hyun,Suh, Jeong-Soo,Ryu, Kyung-Ha,Hong, Ki-Sook,Kim, Hak-Jin The Korean Radiological Society 2002 대한영상의학회지 Vol.46 No.3
Familial erythrophagocytic lymphohistiocytosis is a fatal early childhood disorder characterized by multiorgan lymphohistiocytic infiltration and active hemophagocytosis. Involvement of the central nervous system (CNS) is not uncommon and is characterized by rapidly progressive tissue damage affecting both the gray and white matter. We encountered a case of familial erythrophagocytic lymphohistiocytosis with CNS involvement. Initial T2-weighted MRI of the brain demonstrated high signal intensity in the right thalamus, though after chemotherapy, which led to the relief of neurologic symptoms, this disappeared. After four months, however, the patient`s neurologic symptoms recurred, and follow-up T2-weighted MR images showed high signal intensity in the thalami, basal ganglia, and cerebral and cerebellar white matter. Brain MRI is a useful imaging modality for the evaluation of CNS involvement and monitoring the response to treatment. 가족성 혈액탐식성 림프조직구증다증은 여러조혈기관에 림프조직구가 침윤하며 주로 적혈구를 탐식하는 좨?막?유아기에 발현하며 예후가 매우 불량한 좨?甄? 이 좨??중추신경계의 침범은 드물지 않고, 냅?백졀 회색좇?모두 침범하여 신경손상, 신경교종, 괴사와 탈수초화를 일으킨다. 응湄湧?경험한 중추신경계를 침범한 가족성 혈액탐식성 림프조직구증다증 1예는 T2강조영상에서 우측 시상에 고신호 병변이 있쒼?이는 화학요법 후에 신경학적 증상의 호전?함께 소실되쓴? 4개월 후 신경학적 증상을 동반하며, 시상, 대낢袖핵, 대냄?소냅?백좆?T2강조영상에서 고신호 병변들이 관찰되쓴? ?자기공명영상은 가족성 혈액탐식성 림프조직구증다증의 환자에서 중추신경계의 침범을 진단하고 치료 효갭?판정하며 재발을 발견하는 데 유용한 검사방법이다.
Citrate 농도에 따른 수용액 화학조 증착 ZnO 성장 및 ZnO 박막의 Cu(In,Ga)Se<sub>2</sub> 태양전지 응용
조경수,장현준,오재영,김재우,이준수,최예솔,홍기하,정중희,Cho, Kyung Soo,Jang, Hyunjun,Oh, Jae-Young,Kim, Jae Woo,Lee, Jun Su,Choi, Yesol,Hong, Ki-Ha,Chung, Choong-Heui 한국재료학회 2020 한국재료학회지 Vol.30 No.4
ZnO thin films are of considerable interest because they can be customized by various coating technologies to have high electrical conductivity and high visible light transmittance. Therefore, ZnO thin films can be applied to various optoelectronic device applications such as transparent conducting thin films, solar cells and displays. In this study, ZnO rod and thin films are fabricated using aqueous chemical bath deposition (CBD), which is a low-cost method at low temperatures, and environmentally friendly. To investigate the structural, electrical and optical properties of ZnO for the presence of citrate ion, which can significantly affect crystal form of ZnO, various amounts of the citrate ion are added to the aqueous CBD ZnO reaction bath. As a result, ZnO crystals show a nanorod form without citrate, but a continuous thin film when citrate is above a certain concentration. In addition, as the citrate concentration increases, the electrical conductivity of the ZnO thin films increases, and is almost unchanged above a certain citrate concentration. Cu(In,Ga)Se<sub>2</sub> (CIGS) solar cell substrates are used to evaluate whether aqueous CBD ZnO thin films can be applicable to real devices. The performance of aqueous CBD ZnO thin films shows performance similar to that of a sputter-deposited ZnO:Al thin film as top transparent electrodes of CIGS solar cells.
Shear-coating을 사용한 은 나노와이어 투명 전극 제조 및 특성 분석
조경수(Kyung Soo Cho),홍기하(Ki-Ha Hong),박준식(Joon Sik Park),정중희(Choong-Heui Chung) 한국표면공학회 2020 한국표면공학회지 Vol.53 No.4
Indium tin oxide (ITO) used a transparent electrode of a photoelectric device has a low sheet resistance and a high transmittance. However, ITO is disadvantageous in that the process cost is expensive, and the process time is long. Silver nanowires (AgNWs) transparent electrodes are based on a low cost solution process. In addition, it has attracted attention as a next-generation transparent electrode material that replaces ITO because it has similar electrical and optical characteristic to ITO, it is noted as a. AgNW thin films are mainly produced by spin-coating. However, the spin-coating process has a disadvantage of high material loss. In this study, the material loss was reduced by using about 2∼10 ㎕ of AgNW solution on a (25 × 25) ㎟ substrate using the shear-coating method. It was also possible to align AgNWs in the drag direction by dragging the meniscus of the solution. The electro-optical properties of the AgNW thin film were adjusted by changing the experimental parameters that the amount of AgNWs suspension, the gap between the substrate and the blade, and the coating speed. As a result, AgNW thin films with a transmittance of 90.7 % at a wavelength of 550 ㎚ and a sheet resistance of 15 Ω/□ was deposited and exhibited similar properties to similar AgNW transparent electrodes studied by other researchers.
조경수 ( Kyung Soo Cho ),정재호 ( Jae-ho Jeong ),김영희 ( Young Hee Kim ),김응모 ( Ung-mo Kim ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.1
FP-tree는 연관성 규칙 알고리즘 전체의 성능을 향상 시키며 DB 스캔을 단 2회로 줄였다. 하지만 빈발 항목과 모든 트랜잭션의 tree 정보를 메모리에 상주 시키면서 많은 메모리 공간을 요구했다. 그래서 나온 DRFP알고리즘은 메모리 요구 문제를 저장장치에 저장함으로 해결 하였으나 FP-tree와는 달리 시간 성능에서의 문제점을 가졌다. 그래서 우리는 이러한 문제점을 보완할 NRFP-tree(Nare disc-Resident Frequent pattern Tree)를 제안한다.
조경수 ( Kyung Soo Cho ),류준석 ( Joon-suk Ryu ),김영희 ( Young Hee Kim ),김응모 ( Ung-mo Kim ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.1
인터넷 사용의 증가와 함께 최근 많은 양의 정보가 인터넷에 쏟아지고 있다. 이들 정보는 다른 사람의 생각을 알고 싶어하는 정보 수집 연구자들에게는 매우 유용한 정보이다. 현재 존재하는 오피니언마이닝 기법은 매우 다양하다. 그러나 이러한 기법들은 모든 의견들을 동일한 영향력을 지닌 것으로 취급한다. 하지만 현실에서는 모든 의견이 동일한 영향력을 가지고 있지는 않다. 이런 문제점 해결을 위해서 우리는 새로운 오피니언 마이닝 기법을 제안한다.
현대 박물관건축에 나타난 ‘건축의 공공성’ 표현 특성에 관한 연구
조성춘(Cho Sung-Choon),조경수(Cho Kyung-Soo) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Museums should have research function inquiring into the values of cultural products and legacies of menkind to transmit them to future generations, and displaying function giving the public opportunities of appreciation, and educational function to lighten cultural appreciative eye of the public through these functions at the same time. It might be the museums in where the characteristics of space such as multiplicity and characteristics of such functions and a concern of public character in an architectural aspect are expressed most prominently. Focusing on this, I wil1 study expressional methods of 'architectural public character' which are put forth by museums of the present time.
초고층건축의 도시 LANDMARK 형성에 필요한 기단부 복합요소 분석에 관한 연구
정경재(Jung, Kyung-Jae),조경수(Cho, Kyoung-Soo) 한국실내디자인학회 2010 한국실내디자인학회 학술대회논문집 Vol.12 No.1
The forming element of High-rise building"s landmark divides with visible and invisible elements. Until now, most of the research and study of landmark has only focused on the visible element. As a result, the invisible element which includes the identity of City has gradually lost its true identity and, also brought confusion into the city. In the formation process of the City’s landmark, it is important to find out the invisible elements and the importance of each component. By adding these invisible elements, it is going to help prearranged plans for this research. The plan which considers the invisible identity of the urban area will help understand the development of the spatial structure. Also, the plan will build up an intimate relation with the city’s identity formation. The functional connection between the visible and invisible elements happens at the high-rise building’s stylobate. When you find out the invisible elements and analyze them, then here, you will figure out the city’s landmark’s relative level of contribution. Therefore, finding out the function of the element that can represent the city and combine all of these together, it will be the main achievement of the city’s essential identity.