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Al:Au 음극층을 이용한 양면발광(dual emission) 유기 EL 소자의 Al 두께별 특성 평가
이수환,김달호,양희두,김지헌,이곤섭,박재근,Lee, Su-Hwan,Kim, Dal-Ho,Yang, Hee-Doo,Kim, Ji-Heon,Lee, Gon-Sub,Park, Jea-Gun 한국반도체디스플레이기술학회 2008 반도체디스플레이기술학회지 Vol.7 No.1
The Al:Au double-layer metal electrode for use in transparent, dual emission of organic light-emitting diode (OLED) was fabricated. The electrode of Al:Au metals with various thicknesses was deposited by the vacuum thermal evaporation technique. For Al thickness of 1 nm, a bottom luminance of $4880\;cd/m^2$ was observed at 8 V. Otherwise, top luminance of $2020\;cd/m^2$ were observed at 8 V. In addition, the threshold voltages of the electrodes were 2.2 V. It was forward that the inserting 1 nm Al between LiF and Au enhanced electron injection with tunneling effect.
친환경농업 - 농업의 블루칩$\cdots$ -녹색농자재를 활용한 약용작물 유기재배
이수환,Lee, Su-Hwan 전국농업기술자협회 2011 농업기술회보 Vol.48 No.5
요즘 국내 농산물 산업에서의 화두는 안전성과 기능성이 결합된 친환경농산물 생산에 맞춰져 있다. 이와 함께 농업과학기술 분야에서는 내실 있는 친환경농업을 실천하기 위해 재배기술 및 화학농자재를 대체할 소재개발 연구가 활발히 진행되고 있다.
선량 중첩을 이용한 멀티형 연 X-선 정전기 제거장치의 개발
이수환,이동훈,Lee, Su Hwan,Lee, Dong Hoon 한국안전학회 2018 한국안전학회지 Vol.33 No.2
In display and semi-conductor manufacturing process, there are numerous unstable factors such as particle concentration, minimal vibration, changes in magnetic field, or electrostatic that becomes an issue to be managed and controlled. In the recent, X-ray ionization is widely used that is neutralized by separating air or gas molecules in the area where the static must be resolved. The mono-type of X-ray ionizer was not capable to be used in $8^{th}$ generation panels manufacturing plant due to its insufficient ionizing coverage since the panel itself is approximately in $2m{\times}3m$. To resolve the current problem, the development of new type called, "Multi-type X-ray ionizer" has resulted in covering enough ionizing space in $8^{th}$ generation panels industry. Comparing mono and multi types with MCNPX code simulation, the multi one indicates more X-ray flux, efficiency, and ionization performance in comparison with either a mono-type or multi-type in array format. In addition, the ionizing efficiency of overlapping area with multi-type showed 30% higher effectiveness rate as to the ordinary mono-type.
각막절편 두께 측정법의 비교: 초음파 각막두께측정계의 차감법, 직접측정법과 빛간섭단층촬영계
이수환,이주은,김재용,김명준,차흥원,Su Hwan Lee,Joo Eun Lee,Jae Yong Kim,Myung Joon Kim,Hung Won Tchah 대한안과학회 2011 대한안과학회지 Vol.52 No.5
Purpose: To compare the flap thicknesses measured with the ultrasound (US) subtraction method, the direct method, and optical coherence tomography (OCT) in femtosecond laser-assisted LASIK eyes. Methods: The present study included 65 eyes of 37 patients who underwent femtosecond laser-assisted LASIK surgery. Flap thickness was measured intraoperatively using the direct and subtraction methods with US pachymetry and postoperatively using anterior segment OCT. Flap thickness measurements were compared among the three methods. Results: There was no significant difference between the flap thickness measured using the US subtraction method and OCT (p = 0.511). The flap thickness values obtained by these two different methods also correlated well with each other (γ = 0.820, p < 0.001). However, flap thickness measured using the US direct method was significantly different (p < 0.001) with a low agreement value compared to the other two methods. Furthermore, the US direct method showed a lower measurement success rate compared to the US subtraction method (54% vs. 95%). Conclusions: Flap thickness measured using the US subtraction method and OCT showed different values compared to that measured using the US direct method. Because of the lower measurement success rate and agreement value, the US direct method is not capable of being used in substitute for the US subtraction method. J Korean Ophthalmol Soc 2011;52(5):524-530
코로나방전 표면처리에 따른 폴리에틸렌 절연재료의 특성에 관한 연구(접촉각, 표면층 상태 및 인장강도)
이수환(Su Hwan Lee),이동훈(Dong Hoon Lee) 한국조명·전기설비학회 2018 조명·전기설비학회논문지 Vol.32 No.4
Corona discharge causes dielectric breakdown of insulator, but this is also studied to apply for printing electrical properties on the outside of the high voltage cable. Corona discharge has been used to modify surface treatment for better printing on the outside of polyethylene cable which is used for high voltage insulator. This has a purpose to provide basic knowledge for evaluating low density and high density polyethylene surface safety by measuring contact angle from the surface which depends on change of polyethylene film feed rate and power supply, and by measuring SEM and tensile strength. As result of the test, the slower film speed and the higher input power brings lower contact angle and improved wettability. There was little change on tensile strength by corona discharge and no effect on internal physical properties.
간이식 환자에서 발생한 Nocardia farcinia 폐렴 및 패혈성 쇼크
이수환 ( Su Hwan Lee ),박병훈 ( Byung Hoon Park ),손지영 ( Ji Young Son ),정지예 ( Ji Ye Jung ),김은영 ( Eun Young Kim ),임주은 ( Ju Eun Lim ),이지훈 ( Ji Hoon Lee ),현신영 ( Shin Young Hyun ),이상훈 ( Sang Hoon Lee ),이상국 ( San 대한결핵 및 호흡기학회 2010 Tuberculosis and Respiratory Diseases Vol.69 No.6
Nocardia farcinia, an aerobic, gram-positive bacilli actinomycetes of the genus Nocardia, is an uncommon pathogen found in humans. The most common Nocardia infection sites are the lung, central nervous system, and skin. Even though hematogenous dissemination can occur, isolation of the organism from blood cultures is very rare. We report a case of Nocardia infection that was isolated on blood cultures. A 59-year-old male with a medical history that includes a liver transplantation 6-years prior due to hepatocellular carcinoma secondary to chronic hepatitis B, developed pneumonia and was transferred to Severance Hospital. At the time of admission, the patient`s initial exam showed hypothermia, tachypnea, and hypotension. His chest radiograph showed severe pneumonia and a large abscess on left upper lobe. Under the presumptive diagnosis of bacterial pneumonia or other opportunistic infection, we started broad spectrum antibiotics. However, he developed Nocardia sepsis, rapidly deteriorated, and subsequently died.
이수환(Lee, Su-Hwan),김동훈(Kim, Dong-Hoon) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
The purpose of this study is to plan a public library for seniors in Korea in the process of welcoming the elderly society. There is an increasing trend of older people looking for libraries to read or read newspapers and magazines. But public libraries are still the places where young people study and there is a strong perception that elders are a reluctant to use. In addition, even if they visit a library, there are some difficulties in using the library under the same conditions as other users due to the physical and mental characteristics of the elderly. Therefore, it is urgent to prepare. From the architectural point of view, we intend to encourage active participation of senior users by planning openness, connection of each space, psychological stability and convenient circulation.