• 제목/요약/키워드: Screen effect

검색결과 783건 처리시간 0.061초

스크린 인쇄법에 의해 제작된 유기 박막 트랜지스터용 전극에 관한 연구 (A Study on Contacts for Organic thin-film transistors fabricated by Screen Printing Method)

  • 이미영;남수용
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2006년도 춘계학술대회 논문집
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    • pp.591-592
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    • 2006
  • We studied about the manufacture of the drain-source contacts for OTFTs(organic thin-film transistors) by using screen printing method. The conductive fillers used Ag and carbon black. The conductive contacts with $100{\mu}m$ of channel length were screen printed on a silicon dioxide gate dielectric layer and, the pentacene semiconductor was deposited via vacuum deposition. As a result of studying various conductive pastes, we could obtain the OTFTs which exhibited field-effect behavior over arrange of drain-source and gate voltages, similar to devices employing deposited Au contacts. By using screen-printing with conductive paste, the contacts are processed at low temperature, thereby facilitating their integration with heat sensitive substrates.

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PDA를 위한 스크롤 및 정보 제시 방법의 인간공학적 설계 (Ergonomic Design and Evaluation of Scroll and Information Presentation Methods on a PDA)

  • 백종민;한성호;최훈우;정기효
    • 대한인간공학회지
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    • 제24권1호
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    • pp.19-26
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    • 2005
  • Mobile internet access using such devices as PDAs and cellular phones becomes popular as mobile technologies grow. However, the characteristics of small screen devices such as small screen size and pen-based input cause many usability problems. In this study, a human factors experiment was conducted to identify the factors affecting the usability of information search on a PDA. Factors manipulated in the experiment included use of wheel equipment, scroll dimension, and screen orientation. Task completion time, error frequency, and subjective satisfaction level were measured. In addition, various users' behavioral patterns such as scanning routes and mainly used scrolling methods were analyzed. Scroll dimension has a significant effect on task completion time. Scroll equipment and screen orientation affect subjective satisfaction level. The results could be applied to designing information structure of web sites for mobile use by providing vertical scroll and using external scroll equipments.

Fabrication of Sub-$10{\mu}m$ Screen Printed Organic Thin-Film Transistors on Paper

  • Jo, Jeong-Dai;Yu, Jong-Su;Yun, Seong-Man;Kim, Dong-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.896-898
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    • 2009
  • The printed electrodes of organic thin-film transistors (OTFTs) were fabricated by screen printing using nanoparticle silver pastes. The screen printed OTFT corresponds to channel lengths between 7.6 to 82.6 ${\mu}m$ (designed L=10 to 80 ${\mu}m$) on the $150{\times}150mm^2$ paper. The channel length deviations for 40 to 80 ${\mu}m$ patterns were less than 5 %. However, the channel lengths for 10 to 30 ${\mu}m$ patterns were increased by 20 %. The screen printed bis(triisopropyl-silylethynyl) pentacene (TIPS-pentacene) OTFTs obtained had a field-effect mobility as large as 0.08 (${\pm}0.02$) $cm^2$/Vs, an on/off current ratio of $10^5$ and a subthreshold slope of 1.95 V/decade.

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도시철도 환경개선 및 방재를 위한 스크린도어시스템 최적설계기술 개발 (Development of Optimum Design Technology of Platform Screen Door Systems for the Environment Improvement and Disaster Prevention of Urban Railway)

  • 김정엽
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 동계학술발표대회 논문집
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    • pp.84-87
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    • 2008
  • In order to maximize the effect of installing screen door system while to minimize the problems in an initial stage of introduction, it is strongly required to research an optimum installation solution in connection with ventilation and disaster prevention system alongside with safety structure analysis of screen door in respect to train-induced wind, as well as to develop the criteria for the operation after the installation. This paper presents the results of study to develop the optimum design technology in urban railway equipped with platform screen door systems.

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Behavior of Currents and Suspended Sediments around a Silt Screen

  • Jin, Jae-Youll;Chae, Jang-Won;Song, Won-Oh;Park, Jin-Soon;Kim, Sung-Eun;Jeong, Weon-Mu;Yum, Ki-Dai;Oh, Jae-Kyung
    • Ocean and Polar Research
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    • 제25권spc3호
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    • pp.399-408
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    • 2003
  • The behavior of Suspended Sediment Concentrations (SSC) around a silt screen in a microtidal coastal area was hydrodynamically measured. The current speed at the mid-layer about 30m downstream of the screen reduces to about half that at the same distance upstream. It was caused by the contraction of the vertical section due to the screen. Even during a relatively weak storm period the SSC increases to that of the value caused by dredging. Section-averaged SSC at the downstream of the screen is higher by about 60% than that at the upstream, suggesting that the silt screen plays an adverse effect rather than a constructive role in the reduction of SSC generated by dredging.

고밀도 균일 안개스크린을 위한 에어로졸 유동의 최적 생성조건 (Optimal Conditions of Aerosol Flow Generation for High-density and Uniform Fog Screen)

  • 신동수;송우석;김진원;김우진;구자예
    • 한국분무공학회지
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    • 제22권1호
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    • pp.13-21
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    • 2017
  • The fog screen is a device projecting the media to the aerosol flow field. As major parameters to generate dense and steady fog screen, shear stress, optical blockage ratio and SMD were obtained result through experiment. The micro droplet was generated by the piezo oscillation element, and the aerosol flow mixed with an air flow was sprayed into the vertical direction from the top of the fog screen through the 280 mm slot. For produce a dense, uniform fog screen, the shear effect, optical blockage ratio and SMD between aerosol and air curtain were measured. The minimum and maximum shear stress conditions were selected and it was confirmed that the optical transmission deviation of the aerosol flow field was small when the aerosol and air curtain flow rates were changed. When the aerosol and air curtain flow power were 18 V (1.51 m/s) and 24 V (2.55 m/s), respectively, under the condition of the minimum shear stress and laminar flow, the optical blockage ratios with the spray length were small, and it produced a most stable and high density uniform fog screen by injecting a constant of $10{\mu}m$ or less.

Screen Printing법을 이용한 PMN-PZT 후막의 제조 및 특성 연구 (Fabrication and Characterization of PMN-PZT Thick Films Prepared by Screen Printing Method)

  • 김상종;최형욱;백동수;최지원;김태송;윤석진;김현재
    • 한국전기전자재료학회논문지
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    • 제13권11호
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    • pp.921-925
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    • 2000
  • Characteristics of Pb(Mg, Nb)O$_3$-Pb(Zr, Ti)O$_3$system thick films fabricated by a screen printing method were investigated. The buffer layer were coated with various thickness of Ag-Pd by screen printing to investigate the effect as a diffusion barrier and deposited Pt as a electrode by sputtering on Ag-Pb layer. The printed thick films were burned out at 650$\^{C}$ and sintered at 950$\^{C}$ in O$_2$condition for each 20, 60min after printing with 350mesh screen. The thickness of piezoelectric thick film was 15∼20㎛ and Ag-Pb layer acted as a diffusion barrier above 3㎛ thickness. The PMN-PZT thick films were screen printed on Pt/Ag-Pb(6m) and sintered by 2nd step (650$\^{C}$/20min and 950$\^{C}$/1h) using paste mixed PMN-PZT and binder in the ratio of 70:30, and the remnant polarization of thick film was 9.1$\mu$C/㎠ in this conditions.

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N스크린 서비스 잠재적 수용자의 수용의도 영향요인 연구 (Determinants of Intention to Use toward N Screen Service for Potential User)

  • 오경수
    • 한국콘텐츠학회논문지
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    • 제12권9호
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    • pp.80-92
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    • 2012
  • 본 연구는 N스크린 서비스가 기존 서비스와 차별성을 가진 새로운 서비스라는 점에서 기술수용모델에 입각하여 N스크린 서비스 수용의도에 영향을 미치는 요인을 탐색하는 것이다. 이를 위해 온라인 서베이를 통해 435명의 N스크린 서비스 잠재적 수용자로부터 자료를 수집했다. 연구결과 자기효능감과 지각된 상호작용성은 지각된 사용용이성에 그리고 서비스 다양성, 지각된 상호작용성, 지각된 사용용이성은 지각된 유용성에 정적 영향을 미쳤다. 반면 사회적 영향은 지각된 유용성에 부적 영향을 미쳤다. 한편, 지각된 사용용이성과 지각된 유용성은 N스크린 서비스 수용의도에 긍정적 영향을 미치는 것으로 나타났다. 이런 점에서 N스크린 서비스 확산을 위해서는 시간과 장소에 관계없이 수용자 중심의 다양한 콘텐츠를 양방향으로 편리하게 이용할 수 있다는 인식을 갖게 하는 것이 필요하다.

Hepatoprotective effects and Mechanism of Flavonoids

  • Kim, Young-Gwan;Kim, Dong-Hyun;Lee, Kyung-Tae
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.212.2-212.2
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    • 2003
  • Primary cultured rat hepatocytes injured by carbon tetrachloride as a model to screen for hepatoprotective effect. Four flavonoid compounds showed anti-hepatotoxic effect by decrease GPT. LDH activity and MDA level. Also screen for hepatoprotective, anti-oxidative and anti-apoptosis effects of baicalin and baicalein on chang cell treated with t-BHP. Mesured radical detoxifying enzyme, GST and antioxidant enzyme SOD, Catalase activity, GSH level and Cellular glutathion peroxidase activity. (omitted)

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