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Microcavity 적용 광자 발광 소자의 광 추출 향상 연구
이한별,이은혜,성민호,유시홍,이성의,Lee, Han Byul,Lee, Eun Hye,Sung, Min Ho,Ryu, Si Hong,Lee, Seong Eui 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.5
Recently, microcavity is studied to reduce the optical loss of BLU and OLED. In this paper, we suggest applying microcavity to photo-luminescent lamp with plasma discharge technology to meet the display applications for a BLU for LCD. The structure of photo-luminescent lamp consists of SUS foil and ITO glass with microcavity. The opto-electric characteristics of photo-luminescent lamp with microcavity was evaluated. The brightness of photo-luminescent device was increased over $111cd/m^2$ with the adaptation of patterned microcavity at $30{\mu}m$. The 3D optical simulation verified the enhanced light outcoupling when microcavity applied to the device.
이한별,이규언,장진영,김선회,윤여규,이건욱,오승근,Han-Byoel Lee,M.D.,Kyu Eun Lee,M.D.,Jin-Young Jang,M.D.,Sun-Whe Kim,M.D.,Yeo-Kyu Youn,M.D.,Kuhn Uk Lee,M.D. and Seung Keun Oh,M.D. 대한갑상선-내분비외과학회 2010 The Koreran journal of Endocrine Surgery Vol.10 No.2
Purpose: Insulinoma is a rare disease for which early diagnosis followed by proper surgical management provides a chance for cure. Analyses of clinicopathological features of patients can help optimize the surgical approach in the treatment of insulinoma. Methods: The records of 13 patients (seven male, six female mean age 44.3 years; age range 17∼62 years) who were diagnosed clinically and pathologically with insulinoma and who underwent surgery between March 1997 and April 2007 at the Department of Surgery, Seoul National University Hospital. Hospital in English please were retrospectively examined. Results: All patients had findings compatible with Whipple's triad. Mean fasting blood sugar was 40.5 mg/dl, serum insulin level was 33.5ՌU/ml, and insulin-to-glucose ratio was 0.6. A prolonged starvation test was performed on six patients. Tumors were localized in 10 patients with a computed tomography (CT) scan and in three patients with CT angiography. Five tumors were located in the pancreas head and uncinate process, five in the body, and four at the body-tail border and tail. Patients underwent resection of tumorby enucleation, distal pancreatectomy, pylorus-preserving pancreaticoduodenectomy, laparoscopic distal pancreatectomy, and duodenum-preserving resection of pancreas head. Four immediate postoperative complications (fluid collection, pancreatic fistula, delayed gastric emptying) occurred. No symptoms or recurrences were apparent during the median 15 month follow-up. Conclusion: Insulinoma is difficult to diagnose correctly without a prolonged duration of symptoms. Localization of insulinoma can be aided by a CT scan and/or CT angiography. Less aggressive operative procedures such as simple enucleation might be a sufficient and feasible procedure for curative resection of benign insulinomas. (Korean J Endocrine Surg 2010;10:99-105)
Bulk-fill 복합레진의 상아질 전단결합강도 및 미세누출
이한별,서현우,이주현,박호원,Lee, Hanbyeol,Seo, Hyunwoo,Lee, Juhyun,Park, Howon 대한소아치과학회 2015 大韓小兒齒科學會誌 Vol.42 No.4
본 연구의 목적은 bulk-fill 복합레진의 상아질 전단결합강도 및 미세누출을 평가함에 있다. 실험군으로 1종의 고점도 bulk-fill 복합레진과 2종의 저점도 bulk-fill 복합레진을 사용하였고 대조군으로 1종의 conventional 복합레진을 사용하였다. 상아질 접착제는 7세대를 사용하였다. 영구치를 4군으로 나눈 후 전단결합강도 측정을 위해 레진블록을 실험군은 4 mm, 대조군은 2 mm 두께로 축조하였고, 미세누출을 평가를 위해 실험군은 4 mm 단일층 충전, 대조군은 2 mm씩 2회 적층충전을 시행하였다. 전단결합강도와 관련하여 대조군과 비교하였을 때 저점도 bulk-fill 복합레진에서는 통계적으로 유의한 차이가 존재하지 않았으나, 고점도 bulk-fill 복합레진에서는 유의하게 낮은 값이 관찰되었다(p < 0.05). 미세누출과 관련하여 4군 사이에 통계적으로 유의한 차이가 존재하지 않았다. The aim of this study was to evaluate shear bond strength (SBS) of bulk-fill resin composites (RCs) to dentin and their micro-leakage. One high-viscosity bulk-fill RC and 2 low-viscosity bulk-fill RCs were compared with 1 conventional RC. 7thgenerationbondingagentswereused. In order to evaluate SBS values, 40 permanent molars were selected and divided into 4 groups. The bulk-fill RCs were applied in 4 mm thickness, whereas the conventional RC was applied in 2 mm thickness. In order to evaluate micro-leakage, class I cavities ($5{\times}2{\times}4mm$) were prepared in 32 permanent molars. The teeth were divided into 4 groups and restored with resin composites in an increment of 4 mm for the bulk-fill RC and in 2 horizontal increments of 2 mm for the conventional RC. The mean SBS value of conventional RC showed no statistically significant difference when compared with those of low-viscosity bulk-fill RCs. However, the mean SBS value of high-viscosity bulk-fill RC was significantly lower than that of conventional RC (p < 0.05). There were no statistically significant differences in micro-leakage between the 4 groups. For SBS and micro-leakage, the use of low-viscosity bulk-fill RCs might help clinicians simplify the procedure.
이한별(Hanbyeol Lee),정영철(Youngchul Chung),정원도(Wondo Jeong) 한국HCI학회 2020 한국HCI학회 학술대회 Vol.2020 No.2
이너스타그램(Innerstagram)은 포토 부스를 통해 감정을 추적하는 접근 방법으로, 사용자의 감정상태에 따라 그날 하루를 대표할 수 있는 색상을 입힌 인물 사진을 제공한다. 우리는 2 명의 참가자와 함께 이틀에 걸쳐 실시된 파일럿 테스트를 통해 Innerstagram 의 장점과 개선점을 조사하였다. 파일럿 테스트에는 다이어리 스터디(Diary Study)와 향후 개선을 위한 레트로스펙티브 인터뷰(Retrospective Interview)가 포함되어 있다. Innerstagram 은 꾸준히 마음을 추적하고자 하는 이들을 위해, 매일 일기를 작성하는 대신 사용할 수 있도록 디자인되었다. 우리는 Innerstagram 의 결과물을 인화하여 물리적으로 만질 수 있도록 설계하여 사용자가 계속 자기 추적을 이어가도록 동기를 부여하였고, 제품을 직접 사용하는 경험을 주어 이를 매일 떠올릴 수 있도록 하였다. 직접 사용하는 경험에 대한 흥미가 떨어진다 하더라도 색상을 입힌 사진의 기억은 장기간 유지될 것이다. 이 연구는 감정 추적용 도구의 디자인 특징과 Innerstagram 이 사용자의 지속적인 감정 추적을 독려하는 데에 어떤 역할을 할 수 있는지 그 기회를 보여주며 결론을 내린다.