<link rel="stylesheet" href="styles.cf390c6bfbe7555f.css">

Browsing by Issue Date, starting with "2009-06-08"

Filter results by year or month
Now showing 1 - 20 of 50508
  • Thumbnail Image
    Item type:Item,
    Orientation-dependent potential barriers in case of epitaxial Pt-BiFeO3-SrRuO3 capacitors
    (2009-06-08)
    Pintilie, L.
    ;
    Dragoi, C.
    ;
    Chu, Y. H.
    ;
    Martin, L. W.
    ;
    Ramesh, R.
    The leakage current in epitaxial BiFeO3 capacitors with bottom SrRuO3 and top Pt electrodes, grown by pulsed laser deposition on SrTiO3 (100), SrTiO3 (110), and SrTiO3 (111) substrates, is investigated by current-voltage (I-V) measurements in the 100-300 K temperature range. It is found that the leakage current is interface-limited and strongly dependent on the orientation of the substrate. The potential barriers at the electrode interfaces are estimated to about 0.6, 0.77, and 0.93 eV for the (100), (110), and (111) orientations, respectively.
  • Thumbnail Image
    Item type:Item,
    Orientation-dependent potential barriers in case of epitaxial Pt-BiFeO(3)-SrRuO(3) capacitors
    (2009-06-08)
    Pintilie, L.
    ;
    Dragoi, C.
    ;
    Chu, Y. H.
    ;
    Martin, L. W.
    ;
    Ramesh, R.
    The leakage current in epitaxial BiFeO(3) capacitors with bottom SrRuO(3) and top Pt electrodes, grown by pulsed laser deposition on SrTiO(3) (100), SrTiO(3) (110), and SrTiO(3) (111) substrates, is investigated by current-voltage (I-V) measurements in the 100-300 K temperature range. It is found that the leakage current is interface-limited and strongly dependent on the orientation of the substrate. The potential barriers at the electrode interfaces are estimated to about 0.6, 0.77, and 0.93 eV for the (100), (110), and (111) orientations, respectively.
  • Thumbnail Image
    Item type:Item,
    Tunable Novel Cyclopentadithiophene-Based Copolymers Containing Various Numbers of Bithiazole and Thienyl Units for Organic Photovoltaic Cell Applications
    (2009-06-09)
    Li, Kuang-Chieh
    ;
    Huang, Jen-Hsien
    ;
    Hsu, Ying-Chan
    ;
    Huang, Po-Ju
    ;
    Chu, Chih-Wei
    Six novel conjugated copolymers (P1-P6) containing coplanar cyclopentadithiophene (CPDT) units (incorporated with bithiazole/thienyl-based monomers) were synthesized and developed for the applications of polymer solar cells (PSCs). Copolymers P1-P6 covered broad absorption ranges from UV to near-infrared (400-800 nm) with narrow optical band gaps of 1.70-1.94 eV, which are compatible with the maximum solar photon reflux. Partially reversible p- and n-doping processes of P1-P6 in electrochemical experiments were observed. Compared with those previously reported CPDT-based narrow band gap polymers, the proper molecular design for HOMO/LUMO levels of P1-P6 induced relatively high photovoltaic open-circuit voltages in the PSC devices. Powder X-ray diffraction (XRD) analyses suggested that these copolymers formed highly self-assembled pi-pi stackings. Under 100 mW/cm(2) of AM 1.5 white-light illumination, bulk heterojunction PSC devices containing an active layer of electron donor copolymers P1-P6 blended with electron acceptor [6,6]-phenyl C(61) butyric acid methyl ester (PCBM) in the weight ratio of 1:1 were explored, and the external quantum efficiency (EQE) measurements showed a maximal quantum efficiency of 60%. The PSC device containing P4 in the weight ratio of 1:2 with PCBM gave the best preliminary result with an overall power conversion efficiency (PCE) of 3.04%, an open-circuit voltage of 0.70 V, a short-circuit current of 8.00 mA/cm(2), and a fill factor of 53.7%.
  • Thumbnail Image
    Item type:Item,
    Effect of platinum present in multi-element nanoparticles on methanol oxidation
    (2009-06-10)
    Tsai, Chih-Fang
    ;
    Yeh, Kung-Yu
    ;
    Wu, Pu-Wei
    ;
    Hsieh, Yi-Fan
    ;
    Lin, Pang
    Nanoparticles of Pt(x)Fe((100-x)/5)Co((100-x)/5)Ni((100-x)/5)Cu((100-x)/5)Ag((100-x)/5) (x = 22, 29, 52, 56) were prepared by the sputter depositions on pretreated carbon clothes with their electrocatalytic abilities for the methanol oxidation investigated. XRD analysis of the deposited nanoparticles indicated crystalline fcc phases and SEM images revealed apparent growths of nanoparticulate nodules. Their average sizes were found to increase with the deposition time. Cyclic voltammetry of the deposited samples demonstrated enhancements in the current responses with increasing Pt amount and deposition time. In mass activity, the Pt(52)Fe(11)Co(10)Ni(11)Cu(10)Ag(8) exhibited the highest values of 462-504 mA/mg. Identical process was conducted to fabricate electrodes with sputtered Pt and Pt(43)Ru(57). In comparison, the Pt(52)Fe(11) Co(10)Ni(11)Cu(10)Ag(8) showed moderate improvements over that of Pt but was still outperformed by the Pt(43)Ru(57). (C) 2008 Elsevier B.V. All rights reserved.
  • Thumbnail Image
    Item type:Item,
    Determining thickness of films on a curved substrate by use of ellipsometric measurements
    (2009-06-10)
    Han, Chien-Yuan
    ;
    Lee, Zhen-You
    ;
    Chao, Yu-Faye
    ;
    光電工程學系
    ;
    Department of Photonics
    A three-intensity measurement technique has been employed in polarizer-sample-analyzer imaging ellipsometry to measure the two-dimensional ellipsometric parameters of a coated cylindrical lens. Since azimuth deviation a of a polarizer can also be measured with this three-intensity measurement technique, we tilted a well-calibrated thin-film wafer to identify the orientation of the measured a with respect to the incident plane. Using the analytic property of this measurement technique, we can correct the deviation and determine the thickness profile of the thin film coated on a cylindrical lens. (C) 2009 Optical Society of America
  • Thumbnail Image
    Item type:Item,
    結合音效處理及噪音控制之裝置及方法
    (2009-06-11)
    白明憲
    ;
    歐昆應
    ;
    林建良
    本發明係揭露一種結合3D音效處理及主動噪音控制之裝置及方法,其係以一數位訊號處理器對音訊訊號進行殘響及聲音定位處理,再由耳機播放,並以一設置於喇叭前方之感測器感測播放當時之外界干擾噪音以回授至一噪音控制器,由噪音控制器產生一反噪音訊號消除該外界干擾噪音,以達到提升訊噪比及加强3D聲場效果之目的,此外本發明並針對頭部相關轉移函數的聲音定位處理進行改良,以一更有效率之兩耳間轉移函數取代頭部相關轉移函數,使整體的運算量降低。
  • Thumbnail Image
    Item type:Item,
    MULTI-MODE MULTI-PARALLELISM DATA EXCHANGE METHOD AND DEVICE THEREOF
    (2009-06-11)
    LIU, Chih-Hao
    ;
    Lin, Chien-Ching
    ;
    Lee, Chen-Yi
    ;
    Chang, Hsie-Chia
    ;
    Hsu, Yarsun
    A multi-mode multi-parallelism data exchange method and the device thereof are proposed to apply to a check node operator or a bit node operator. The proposed method comprises the steps of: duplicating part or all of an original shift data as a duplicated shift data; combining the original shift data and the duplicated shift data to form a data block; and using a data block as the unit to shift this data block so as to conveniently retrieve shift data from the shifted data block. With a maximum z factor circuit and duplication of part of data, specifications of different shift sizes can be supported. The functions of shifters of several sizes can therefore be accomplished with the minimum complexity.
  • Thumbnail Image
    Item type:Item,
    文憑迷思？學生業界怎麼說
    (2009-06-14)
    陳妙寧
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    0
  • Thumbnail Image
    Item type:Item,
    罪惡的陪襯品 龍與龍騎士
    (2009-06-14)
    何宛芯
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    請勿更動原始碼~
  • Thumbnail Image
    Item type:Item,
    《魔鬼終結者》　經典終結？
    (2009-06-14)
    余建良
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    影評
  • Thumbnail Image
    Item type:Item,
    傳說中 那虛幻的生物
    (2009-06-14)
    趙祿平
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    標題我亂用得 請好好想唷～啾咪～ 歐 我發現我按下去會出現兩個 但是我只想要下面那個比較大的 可以幫我把上面那個刪掉嗎？？ 下面那個是可以編輯的 別亂砍就不會消失 但是上面那個我就不知道了 ＝ ＝
  • Thumbnail Image
    Item type:Item,
    排球新制 上路急推行
    (2009-06-14)
    陳碩峰
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    題目會再改 主題是在講排球新規則的公佈 與新規則的不同點 與造成的效應
  • Thumbnail Image
    Item type:Item,
    新移民之子　後天教育弱勢
    (2009-06-14)
    林潔
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    教育問題
  • Thumbnail Image
    Item type:Item,
    萌系聲優　堀江由衣
    (2009-06-14)
    洪效凡
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    萌系聲優　堀江由衣
  • Thumbnail Image
    Item type:Item,
    保存文化　各部落經營有道
    (2009-06-14)
    葉曉昀
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    NO
  • Thumbnail Image
    Item type:Item,
    走向國際 徐正賢推動網壇
    (2009-06-14)
    楊雅筑
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    愛網球成癡,工程師變球壇推手
  • Thumbnail Image
    Item type:Item,
    走近原民　大學生上山課輔
    (2009-06-14)
    黃湘茹
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    其實我不太知道這是屬於哪個欄目耶....
  • Thumbnail Image
    Item type:Item,
    中性風正夯　直捲音樂界
    (2009-06-14)
    徐苾芬
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    ㄏㄏ 上傳過第二次檔案了。
  • Thumbnail Image
    Item type:Item,
    H1N1來襲 大陸防疫吃緊
    (2009-06-14)
    郭大齊
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    ^^
  • Thumbnail Image
    Item type:Item,
    第五十四期總編輯的話
    (2009-06-14)
    林麗珊
    ;
    Department of Communication and Technology
    ;
    傳播與科技學系
    總編輯的話