• 제목/요약/키워드: Yoon Dong-ju

검색결과 701건 처리시간 0.031초

Fast response time PDP phosphors for 3D display application

  • Song, Jay-Hyok;Song, Yu-Mi;Kim, Ji-Hyun;Kim, Min-Ju;Kim, Ji-Hyun;Kwon, Seon-Young;Park, Do-Hyung;Kim, Yoon-Chang;Zang, Dong-Sik
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.1255-1258
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    • 2008
  • New phosphors that enable the 3D application of PDP have been developed The decay times of $Y_3Al_5O_{12}:Ce^{3+}$, $(Y,Gd)Al_3(BO_3)_4:Tb^{3+}$ and $(Y,Gd)_2O_3:Eu^{3+}$ were extremely shorter than those of conventional PDP phosphors. The color coordinates and intensities of the phosphors were also suitable for PDP For the first time in PDP industry, 3D/2D switchable PDP has been commercially available by adopting the phosphors.

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병실의 자연광 환경에 따른 환자들의 입원기간 비교 (The Comparison of hospitalization time of Patients According to Natural Light in Hospital)

  • 김형섭;김민성;이주윤;송규동
    • KIEAE Journal
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    • 제5권2호
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    • pp.35-41
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    • 2005
  • This study was conducted to identify the effect of daylighting in hospitals on hospitalization time of patients and patients' outcomes in hospitals. Two major variations include orientation of hospital wards and the hospitalization times of various kinds of patients. Patients' data were obtained from two hospitals located in Seoul, Korea. The hospital buildings have north-facing and north-facing wards. The patients were classified according to the types of diseases and the orientation of the patient rooms. Then, statistical T-tests were applied in order to verify if natural light might shorter the hospitalization time of patients. The study also identified the types of diseases that were more responsive to the quantity of natural light in patient rooms. This information may be used as a basis for the development of guidelines for patient rooms in hospitals to achieve more effective healing environments. Likewise, the results may be applied to medical treatment buildings, recreational centers and hospital as well.

신경회로망에 의한 부하모델링과 계통해석 (A Study on the Load Modeling Using Artificial Neural Network and Power System Analysis)

  • 지평식;이종필;임재윤;김기동;박시우;김정훈
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 하계학술대회 논문집 C
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    • pp.1230-1232
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    • 1999
  • In this research, ANN load model was built on results of field test using residential load, and then proposed ANN load model was applied to transient analysis. The results of this research are as follows. The first, component load modeling using ANN was implemented. The second, group load model was proposed by aggregation of component load. The third, proposed load model was applied to power system analysis. Therefore, Importance of load modeling and precise load modeling method was suggested in this paper.

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탄소나노튜브 상대전극을 이용한 염료감응형 태양전지 (Carbon nano-tube as the Counter electrode for Dye-sensitized Solar cell)

  • 구보근;이동윤;김현주;이원재;송재성
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2004년도 추계학술대회 논문집 Vol.17
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    • pp.691-694
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    • 2004
  • 염료감응형 태양전지는 다공질 $TiO_2$ 전극막, 광감응형 염료, 전해질, 상대전극으로 구성된, 전기화학적 원리를 응용한 신형태양전지이다. 염료감응형 태양전지의 상대전극으로 주로 Pt가 사용되고 있는데 본 연구에서는 탄소나노튜브를 사용하여 상대전극으로서의 가능성을 조사하였다. 제조된 탄소나노튜브 상대전극은 cyclic voltammetry와 Impedance spectroscopy을 이용하여 전기화학적 특성을 측정하였다. 또한 탄소 나노튜브 상대 전극이 태양전지의 효율 및 그 특성에 미치는 영향을 알아보기 위하여 단위 셀 태양전지를 제조하여 단파장 하에서의 광전특성을 측정하고, 이를 바탕으로 탄소나노튜브의 상대전극으로서의 가능성을 제시하였다.

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R-R 간격을 이용한 PVC-RUNs 부정맥 검출 (Assessment of PVC-RUNs Arrhythmia by R-R Interval)

  • 이선주;윤태호;김경섭;이정환
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2009년도 정보 및 제어 심포지움 논문집
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    • pp.393-395
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    • 2009
  • 심장의 활성 근육의 움직임에 의하여 발생되는 전기적 변화량을 나타내는 심전도는 부정맥 또는 허혈성 심장질환을 진단하는데 널리 활용되고 있다. 특히 심실빈맥(Ventricular Tachycardia) 또는 심실세동(Ventricular Fibrillation)과 같이 치명적인 심장리듬이 발생하기 이전에, 심실조기수축(Ventricular Premature Contraction)을 검출하여 생명을 위협할 수 있는 부정맥을 조기에 진단할 수 있는 연구들이 일부 진행되고 있다. 이에 따라서 본 연구에서는 심전도 신호의 R-R 간격 정보와 R-peak 정보의 진위성을 판단하여 PVC 부정맥 패턴뿐만 아니라 PVC 파형이 연속적으로 진행되는 PVC-RUNs을 효율적으로 검출할 수 있는 부정맥 진단 알고리즘을 제안하고자 하였다.

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FRP Re-bar 보강 직사각형 단면 콘크리트 보의 구조적 거동 및 설계방법에 관한연구 (A Study on the Structural Behavior and Design Criteria of FRP Re-bar Reinforced Rectangular Concrete Beam)

  • 주형중;옥동민;박주경;윤순종
    • 한국복합재료학회:학술대회논문집
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    • 한국복합재료학회 2005년도 추계학술발표대회 논문집
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    • pp.276-279
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    • 2005
  • FRP Composite materials are widely applicable in the construction industries as a load-bearing structural element or a reinforcing and/or repairing materials for the concrete. In this paper, we presented the flexural behavior of FRP Re-bar and steel reinforced concrete beams and only FRP re-bars reinforced concrete beams. FRP Re-bar manufactured by different fibers but the same vinylester resin. Also, surface of FRP Re-bars is coated garnet and glass fiber by epoxy to increase the adhesive to concrete. Experimental investigation pertaining to the load-deflection and load-strain characteristics of two classfied specimens is presented and the theoretical prediction is also conducted. In the investigation, the effects of FRP Re-bar reinforcement are estimated. The experimental results arc compared with theoretical predictions. Good agreements arc observed.

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Papper transformation by disease defense related genes

  • Lee, Yun-Hee;Jung, Min;Shin, Sun-Hee;Kim, Ju-Yeon;Park, Yoon-Sik;Choi, Soon-Ho;Shim, Dong-Bo;Her, Nam-Han;Lee, Jang-Ha;Lee, Mi-Yeon;Ryu, Ki-Hyun;Paek, Kee-Yoeup;Harn, Chee-Hark
    • 한국식물생명공학회:학술대회논문집
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    • 한국식물생명공학회 2005년도 추계학술대회 및 한일 식물생명공학 심포지엄
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    • pp.180-180
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    • 2005
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대용량 태양광발전 연계 배전계통 전기품질 분석 (Power Quality Analysis of the Distribution System with Large scale PV Generators)

  • 정원욱;신동열;이학주;조성수;윤기갑
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 제39회 하계학술대회
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    • pp.528-529
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    • 2008
  • 본 논문에서는 국내에 건설된 MW급 태양광 발전소를 대상으로 태양광발전의 출력 특성과 전기품질을 분석하였다. 태양광발전에 의한 전기품질 평가를 위해 1MW 용량의 태양광발전 연계 배전계통을 대상으로 전기품질 측정시스템을 구축하여 1달간 데이터를 취득하였으며 태양광발전의 출력 고조파를 분석하였다. 또한 태양광발전 연계 배전계통의 변전소 및 말단 부하단에서 동시에 전기품질을 모니터링하여 태양광발전이 배전계통의 전기품질에 미치는 영향을 분석하였다.

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Coating defects in polymer-coated drug-eluting stents

  • Bedair, Tarek M.;Cho, Youngjin;Park, Bang Ju;Joung, Yoon Ki;Han, Dong Keun
    • Biomaterials and Biomechanics in Bioengineering
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    • 제1권3호
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    • pp.131-150
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    • 2014
  • Vascular stenting has a great attention as a treatment for coronary arteries diseases as compared with percutaneous balloon angioplasty. In-stent restenosis and thrombosis are side effects resulting from using bare metal stent (BMS). Employing platelet therapy allowed to reduce the rate of thrombosis, however, the rate of restenosis remains a major problem. In 2002, drug-eluting stents (DESs) were introduced as an effort to reduce the restenosis. The commercially available DESs continue to suffer from coating defects that might lead to a series of adverse effects. Most importantly, multiple concerns remain regarding the polymer coating integrity on metal surfaces or the relation of polymer irregularities to longterm adverse events.