• Title/Summary/Keyword: Lee Sang Ik

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Study on the Fabrication and Characterization of Red-Light-Emitting Organic Electroluminescent Devices Using Europium Complexes

  • Lee, Sang-Pil;Choi, Don-Soo;Lee, Seung-Hee;Zyung, Tae-Hyung;Kim, Young-Kwan;Kim, Jung-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2000.01a
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    • pp.211-212
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    • 2000

  • Organic electroluminescent devices (OELDs) have received a great deal of attention due to their potential application as full-color displays. Europium complexes are known as excellent red light-emitting materials for OELDs since they show intense photoluminescence at around 612 nm with a narrow spectral bandwidth. In this study, a novel europium complex, $Eu(TTA)_3(TPPO)$ was synthesized and its photoluminescent and electroluminescent characteristics were investigated with a device structure of ITO/TPD/$Eu(TTA)_3(TPPO)$/ $Alq_3$/Al, where sharp emission at the wavelength of 615 nm has been observed. Details on the electrical properties of these structures was also discussed.

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The Study on Treeing under the Temperature Variation in Low Density Polyethylene Mixed with Dodecyl Alcohol (Dodecyl Alcohol이 첨가된 P.E에서 온도변화에 따른 Treeing에 관한 연구)

  • Lee, Chang-Hee;Lee, Kye-An;Kim, Sang-Jun;Kim, Jung-Soo
    • Proceedings of the KIEE Conference
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    • 1989.11a
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    • pp.75-78
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    • 1989

  • Insulation of P.E insulated cable under the field of high-voltage will be breakdown ultimately due to the degradation process called 'Treeing' which is generated in the insulation, so long as any counter-measure suppressing or eliminating it could not be provided. In this paper as a counter-measure Dodecyl Alcohol is mixed with P.E and Treeing under the temperature variation has been observed. Results show that the larger weight ratio of Dodecyl Alcohol is stronger the effect of suppressing Tree ing in the range from room temperature to 40$^{\circ}C$ and generated Treeing has been soon eliminated and it never again generated.

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Automatic document generation for effective project management plan specification (효과적인 프로젝트 관리 계획서위한 프로젝트 문서 생성 자동화)

  • Kang, Geon-Hee;Son, Hyun Seung;Yi, Geun Sang;Kim, R. Young Chul;Lee, Sang Eun
    • Proceedings of the Korea Information Processing Society Conference
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    • 2015.10a
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    • pp.959-961
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    • 2015

  • 현재 많은 소프트웨어 개발 기업들은 제품 개발에만 치중되어 품질 유지/관리 측면의 문서 산출물을 만들 여유가 없다. 그리고 프로젝트 문서 관리 자체가 주먹구구식이며, 차후 평가나 검수시 문서 산출물을 만드는 경향이 있다. 이 문제 해결위해, 실시간으로 프로젝트가 진행되는 상황에 맞게 문서를 자동 생성하는 방법을 제안한다. 이 방법은 기존의 통합관리(CI) 시스템에 XML과 XSLT 기법을 접목하여 프로젝트 계획 문서를 자동 추출가능하다. 이로 인해 소규모의 영업장에서도 적은 인원으로도 프로젝트 관리를 효율적으로 할 수 있고, 실제 문서와 프로젝트의 진행의 불일치가 많이 줄어들 것으로 판단된다.

  • https://doi.org/10.3745/PKIPS.y2015m10a.959 인용 PDF