• Title/Summary/Keyword: implementation of PEO

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Electrical and Optical Properties of Electrochromic Window with Both Lithium and Proton Conducting Polymer Electrolytic Media (리튬 및 프로톤 전도성 고분자전해질을 사용하여 제작한 Electrochromic 창의 전기 및 광학적 특성)

  • 박성용;이철환;김형선;조원일;조병원;윤경석;안춘호;우경근
    • Journal of the Korean institute of surface engineering
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    • v.28 no.1
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    • pp.46-54
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    • 1995
  • An electrochromic(EC) cell was constructed using $WO_3$ as a electrochromic material and NiO as a counter electrode, deposited onto ITO-coated glass by the implementation of electron beam evaporation. The electrolytic media were both lithium and proton conducting polymers such as poly-acrylonitrile(PAN)-$LiClO_4$, poly-ethylene oxide(PEO)-$LiClO_4$, poly-vinyl butyral(PVB)-LiCl and PVB-H$_3$$PO_4$. Potentiodynamic cycling of the cells using PAN-$LiClO_4$, or PVB-$H_3$$PO_4$ electrolyte yielded a transmission variation of more than 40% at the wavelength of 632.8 nm within less than 10 sec response time at room temperature. These results indicate that these electrolytes, transparent in gel type, are premising for the application in large area electrochromic windows.

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Development of Evaluation Model for achieving the Program Educational Objectives in KEC2005 (한국공학교육인증의 '프로그램 교육목표' 달성을 위한 평가 모형 개발)

  • Kim, Myoung-Lang;Yoon, Woo-Young;Kim, Bok-Ki
    • Journal of Engineering Education Research
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    • v.11 no.2
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    • pp.42-49
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    • 2008
  • Though the 'Program Educational Objectives' is the first and important criterion in ABEEK's engineering education accreditation, exact meaning and implementation methods have not been understood well. It was often confused with 'Program Outcomes' and its implementation and evaluation methods do not reflected well on the concepts of "outcomes based and demand driven education". A new implementation model for 'Program Educational Objectives' has been developed using step by step application. The model explains the meaning of every step (phase), and key constituents in each phase. The specialization and CQI of the program could be satisfied by applying the model properly.