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유승협 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
본 발표에서는 OLED의 광추출효율 향상 기술에 대하여 소개한다. 특히 광추출향상 구조와 OLED의 다층박막 기저 구조 전체를 아우르는 trans-scale 시뮬레이션을 통해, 단순 향상비가 아닌 최종 효율을 극대화하는 글로벌 다변수 최적화 기법에 대해 소개한다. 또한, 저굴절율 층 도입을 통해 표면플라즈몬 손실의 감소 방안 기법을 탐구하고, 이를 통해 궁극의 효율 도달을 위한 방법에 대하여 논한다. 하프볼 렌즈없이도 LED의 외부양자효율에 필적할만한 효율을 구현하는 방법을 보이며, 또한 OLED 광원이 웨어러블에 쓰일 때의 고려해야할 OLED의 비교우위적 특성에 대해 논의한다.
저체온치료를 받은 병원전 심정지 환자에서 시간가중평균산소분압과 예후와의 관계
유승협,이병국,정경운,정용훈,이성민,이동훈,송경환,허탁,민용일 대한응급의학회 2014 大韓應急醫學會誌 Vol.25 No.2
Purpose: Studies to determine the relation between oxygentension and outcome in cardiac arrest survivors treated withtherapeutic hypothermia (TH) are lacking. We investigatedthe relation of time-weighted mean oxygen tension (TWMO2)and outcome in cardiac arrest survivors treated with TH. Methods: This was a retrospective observational studyincluding 177 out-of-hospital cardiac arrest (OHCA) survivors. The patients were divided into four categories according toquartile values of TWMO2. The primary outcome was neurologicoutcome at discharge and the secondary outcome wasall cause in-hospital mortality. We assessed neurologic outcomeusing the Cerebral Performance Categories (CPC) athospital discharge. Neurologic outcome was dichotomised aseither good neurologic outcome (CPC1 and CPC2) or poorneurologic outcome (CPC 3 to 5). The odds ratio with 95%confidence interval (CI) was estimated. Results: The median value of PaO2 was 139(104.5-170.0)mmHg. Among a total of 1,239 PaO2 values, 22(1.8%) valueswere hypoxia (<60 mmHg) and 16(1.3%) values werehyperoxia (>300 mmHg). Results of univariate logisticregression analysis showed a significantly low odds ratio forpoor neurologic outcome [0.353(95% CI, 0.133-0.938) and0.321(95% CI, 0.121-0.850), respectively] and for in-hospitalmortality [0.338(95% CI, 0.132-0.870) and 0.387(95%CI, 0.154-0.975), respectively] for the third quartile and thefourth quartile. However, results of multivariate logisticregression analysis showed no significant relation betweenTWMO2 and outcomes. Conclusion: In OHCA survivors treated with TH, timeweightedoxygen tension did not show an association withneurologic outcome and in-hospital mortality.