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Luminance Characteristics of a Novel Red-Light-Emitting Device Based on Znq2 and Dye
Min-JeongCho,Wan-JiChoi,Jeong-GuLee,Min-SuLim,Kee-JoeLim,Hyun-HooKim 한국전기전자재료학회 2002 Transactions on Electrical and Electronic Material Vol.3 No.2
In this study, a novel red emitting organic electroluminescent (EL) device was fabricated with the bis(8-oxyquinolino)zinc II (Znq2) doped dye as an emitting layer. The Znq2 was synthesized successfully from zinc chloride (ZnCl2) as an initial material. Then, we fabricated the red organic EL device with a dye (DCJTB) doped and inserted Znq2 between emission layer and cathode for increasing EL efficiency. The hole transporting layer is a N,N’-diphenyl-N,N’-bis-(3-methylphenyl)-1,1’-diphenyl-4,4-diamine (TPD), and the host material of emission layer is Znq2. And the electrical and luminance characteristics of the device were measured. We found that the EL device with Znq2 inserting layer results in the increasing luminance efficiency.
학령전기 아동 대상의 스마트기기를 사용한 전산화 주의력 평가과제의 개발 및 타당도 검증 연구
신민섭(Min-Sup Shin),이진주(Jinjoo Lee),오서진(Seojin Oh),김일중(Illjung Kim),홍초롱(Chorong Hong),김수림(Sulim Kim) 대한소아청소년정신의학회 2015 소아청소년정신의학 Vol.26 No.2
Objectives:The aim of this study was to develop computerized attention tasks using smart devices for preschool aged children for assessment of auditory attention, visual attention, and attention shifting abilities. We then evaluated their construct and concurrent validity of them. Methods:Sixty-seven 5- to 7-year-old children attending kindergarten were recruited. Newly developed computerized attention tasks and existing standardized attention tests such as Advanced Test of Attention (ATA) and Children’s Color Trails Test-2 (CCTT-2) were successively administered. To examine the concurrent validity of these tasks, correlation coefficients between the participants’ scores on the newly developed tasks and the scores on well-known measures were calculated for assessment of each component construct. We also examined the construct validity of the tasks using the developmental trend of the auditory attention, visual attention, and attention shifting abilities with age. Results:Significant correlations were observed between the scores of computerized attention tasks using smart devices and corresponding scores of ATA-auditory task, visual task, and CCTT-2. And there were significant linear increasing trends of correct scores with age from 5 to 7 years. Conclusion:This study provides promising evidence for the utility of computerized attention tasks using smart devices for preschool-aged children.