Browsing by Issue Date, starting with "2015-03-25"

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Self-Reactivated Mesostructured Ca-Al-O Composite for Enhanced High-Temperature CO2 Capture and Carbonation/Calcination Cycles Performance
(2015-03-25)
Chang, Po-hsueh
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Huang, Wei-Chen
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Lee, Tai-Jung
;
Chang, Yen-Po
;
Chen, San-Yuan
In this study, highly efficient high-temperature CO2 sorbents of calcium aluminate (Ca-Al-O) mesostructured composite were synthesized using presynthesized mesoporous alumina (MA) as a porous matrix to react with calcium nitrate through a microwave-assisted process. Upon annealing at 600 degrees C, a highly stable mesoporous structure composed of poorly crystalline Ca(12)A(14)O(33) phase and the CaO matrix was obtained. The Ca-Al-O mesostructured sorbents with a Ca2+/Al3+ ratio of 5:1 exhibit an enhanced increasing CO2 absorption kinetics in the CO2 capture capacity from 37.2 wt % to 48.3 wt % without apparent degradation With increasing carbonation/calcination cycling up to 50 at 700 degrees C due to the strong self-reactivation effect of the mesoporous Ca-Al-O microstructure. Remarkable improvements in the CaO-CaCO3 conversion attained from the mesostructured Ca-Al-O composite can be explained using the concept combined with available mesoporous structure and Ca12Al14O33 phase content. However, a high Ca2+/Al3+ =8:1 Ca-Al-O composite causes degradation because the pores become blocked and partial sintering induces CaO agglomeration.
Evaluating and selecting the biometrics in network security
(2015-03-25)
Liu, Che-Hung
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Wang, Jen-Sheng
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Peng, Chih-Chiang
;
Shyu, Joseph Z.
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科技管理研究所
Since Apple merged with AuthenTec, a leading fingerprint recognition company, in 2012, biometrics has widely been considered to strengthen security and privacy in the network security field. Although biometrics has been applied in specific areas for decades, it has gradually proliferated in customer and mobile electronic products to enhance security and privacy. This study aims to evaluate biometrics through conventional technology assessment considerations combined with viewpoints on the specifics of biometric technologies and then to provide suggestions for selection. To conduct the biometric technology assessment, the fuzzy analytic hierarchy process and non-fuzzy best performance approaches are used. Although the outcomes first indicate that technology assessment should be the key object in selecting biometric technologies, that object is followed by biometric competence and key elements of biometrics. The outcomes also indicate that features of the target technologies should be considered when evaluating them. Additionally, fingerprint recognition, iris recognition, and face recognition are the preferred biometrics in evaluation and selection. Copyright (c) 2014 John Wiley & Sons, Ltd.
Solution-Processed Zinc Oxide/Polyethylenimine Nanocomposites as Tunable Electron Transport Layers for Highly Efficient Bulk Heterojunction Polymer Solar Cells
(2015-03-25)
Chen, Hsiu-Cheng
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Lin, Shu-Wei
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Jiang, Jian-Ming
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Su, Yu-Wei
;
Wei, Kung-Hwa
In this study, we employed polyethylenimine-doped sol-gel-processed zinc oxide composites (ZnO:PEI) as efficient electron transport layers (ETL) for facilitating electron extraction in inverted polymer solar cells. Using ultraviolet photoelectron spectroscopy, synchrotron grazing-incidence small-angle X-ray scattering and transmission electron microscopy, we observed that ZnO:PEI composite films\' energy bands could be tuned considerably by varying the content of PEI up to 7 wt %-the conduction band ranged from 4.32 to 4.0 eV-and the structural order of ZnO in the ZnO:PEI thin films would be enhanced to align perpendicular to the ITO electrode, particularly at 7 wt % PEI, facilitating electron transport vertically. We then prepared two types of bulk heterojunction systems-based on poly(3-hexylthiophene) (P3HT):phenyl-C-61-butryric acid methyl ester (PC61BM) and benzo[1,2-b:4,5-b]dithiophene-thiophene-2,1,3-benzooxadiazole (PBDTTBO):phenyl-C-71-butryric acid methyl ester (PC71BM)-that incorporated the ZnO:PEI composite layers. When using a composite of ZnO:PEI (93:7, w/w) as the ETL, the power conversion efficiency (PCE) of the P3HT:PC61BM (1:1, w/w) device improved to 4.6% from a value of 3.7% for the corresponding device that incorporated pristine ZnO as the ETL-a relative increase of 24%. For the PBDTTBO:PC71BM (1:2, w/w) device featuring the same amount of PEI blended in the ETL, the PCE improved to 8.7% from a value of 7.3% for the corresponding device that featured pure ZnO as its ETL-a relative increase of 20%. Accordingly, ZnO:PEI composites can be effective ETLs within organic photovoltaics.
NON-INVASIVE INTRAOCULAR PRESSURE SENSOR
(2015-03-26)
Chiou Jin-Chern
;
Yang Tzu-Sen
;
Huang Yu-Chieh
;
Yeh Kuan-Ting
A non-invasive intraocular pressure sensor adapted to be configured on an eyeball is provided. The non-invasive intraocular pressure sensor includes a sensing unit and a readout circuit. The sensing unit includes a plurality of electrode layers and a dielectric layer. The dielectric layer encloses the electrode layers and fills therebetween, and the electrode layers and the dielectric layer form a capacitor. A variation of capacitance of the capacitor varies with a variation of an intraocular pressure of the eyeball. The readout circuit is electrically connected to the sensing unit.
A novel and facile decay path of Criegee intermediates by intramolecular insertion reactions via roaming transition states
(2015-03-28)
Trong-Nghia Nguyen
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Putikam, Raghunath
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Lin, M. C.
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應用化學系
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應用化學系分子科學碩博班
We have discovered a new and highly competitive product channel in the unimolecular decay process for small Criegee intermediates, CH2OO and anti/syn-CH3C(H)OO, occurring by intramolecular insertion reactions via a roaming-like transition state (TS) based on quantum-chemical calculations. Our results show that in the decomposition of CH2OO and anti-CH3C(H)OO, the predominant paths directly produce cis-HC(O)OH and syn-CH3C(O)OH acids with >110 kcal/mol exothermicities via loose roaming-like insertion TSs involving the terminal O atom and the neighboring C-H bonds. For syn-CH3C(H)OO, the major decomposition channel occurs by abstraction of a H atom from the CH3 group by the terminal O atom producing CH2C(H)O-OH. At 298 K, the intramolecular insertion process in CH2OO was found to be 600 times faster than the commonly assumed ring-closing reaction. (c) 2015 AIP Publishing LLC.
行動革命　商業霸主
(2015-03-29)
陳亞柔
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Department of Communication and Technology
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傳播與科技學系
行動裝置改變人類生活型態，成為日常基本所需，但他們的意義並不只如此。
角色雷同　手遊公司遭告
(2015-03-29)
賴奕安
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Department of Communication and Technology
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傳播與科技學系
遊戲大廠美商暴雪公司因手機遊戲刀塔傳奇中角色、故事設定有多處抄襲暴雪旗下遊戲魔獸世界，進而對刀塔傳奇提告。
「清」愛的　校園二手市集
(2015-03-29)
黃詩涵
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Department of Communication and Technology
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傳播與科技學系
校園二手市集「清愛的，我們做個交易吧！」於三月二十二日在清大舉行，吸引在校師生與社區民眾前來參與。
總編輯的話
(2015-03-29)
洪詩宸
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Department of Communication and Technology
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傳播與科技學系
本周為喀報第二○九期，共有二十三篇稿件。本期媒材多元，四種媒材都有人發表，共有新聞圖表五則、廣播一則、動畫四則、電視專題一篇、文字十二篇。本周頭題為張凱翔的〈工業與農搶水　強制休耕〉，結合近日缺水時事，以新聞圖表呈現農業與工業水資源分配不均的情形。除此之外，陳思寧的〈廉價航空　帶你去旅行〉與杜以翔的〈走進美國　小費學問大〉，以旅行為主題，分別從機票與小費，兩點出國會遇到的事情探討。李恬芳的〈七種人格　心碎與浪漫〉以韓劇為主題，點出現今社會日益增大的精神壓力問題。而陳亞柔的〈行動革命　商業霸主〉與顏晟宇的〈逆轉生活不便　打造新世界〉以行動裝置為主題，分別探討現今的行動裝置市場與科技創新的要點，文章論點紮實也寫出成功人士的創業歷程，值得一看。本期側欄廣告為清交合併談判，以清交兩校合併為包裝，實際則是因為愚人節將至，為了娛樂大家，期望大家愉快地度過愚人節。
人生無設限　真愛便是希望
(2015-03-29)
劉雨婕
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Department of Communication and Technology
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傳播與科技學系
當代傑出的物理學家史蒂芬霍金，不論在婚姻或是學術研究上，他的成就不斷超乎世人想像，創造奇蹟。
廉價航空　帶你去旅行
(2015-03-29)
陳思寧
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Department of Communication and Technology
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傳播與科技學系
雖然臺灣廉價航空公司發展正起步，但已擁有不少客群。因此，需要出國的人們應備有相關的知識。
逆轉生活不便　打造新世界
(2015-03-29)
顏晟宇
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Department of Communication and Technology
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傳播與科技學系
創業至今，林修平從生活中的不便激發出許多創意點子並化為實質的服務，解決自己困擾，也解決了眾人的難題。
演藝人生　時代之歌
(2015-03-29)
張婷芳
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Department of Communication and Technology
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傳播與科技學系
日本文化至寶－演歌的歷史演變、簡介與現況。
三分鐘熱度　廣泛學習
(2015-03-29)
陳珮容
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Department of Communication and Technology
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傳播與科技學系
雖然學過多項才藝，乍看之下是十八般武藝樣樣精通的「才女」，但事實上卻都只是略懂皮毛。
創新偶電影　難懂觀眾情
(2015-03-29)
包金
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Department of Communication and Technology
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傳播與科技學系
臺灣第一部3D偶動畫，雖然做了許多創新，但票房卻不如預期。
認識星星的孩子
(2015-03-29)
黃馨儀
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Department of Communication and Technology
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傳播與科技學系
自閉症患者是因腦部功能異常而引致的一種發展障礙，讓大眾了解自閉症及其應對方式，能讓自閉症患者得到應有的尊重。
手機遊戲好潛力　競爭更劇
(2015-03-29)
李怡安
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Department of Communication and Technology
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傳播與科技學系
臺灣超越英國，成為全球前五大手機遊戲市場，臺灣遊戲產業所面對的競爭將更加激烈。
淘氣男孩　童心看世界
(2015-03-29)
林霈楨
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Department of Communication and Technology
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傳播與科技學系
【小淘氣尼古拉】是改編自同名漫畫的法國電影，尼古拉與他的死黨們展開一連串有趣的救援作戰。
小人物駐足　真幌大街小巷
(2015-03-29)
簡品心
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Department of Communication and Technology
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傳播與科技學系
【真幌站前多田便利屋】以便利屋的委託工作為引子，萃取出真幌市的人情百態。
七種人格　心碎與浪漫
(2015-03-29)
李恬芳
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Department of Communication and Technology
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傳播與科技學系
【Kill me heal me】描述罹患人格分裂症的主角的心路歷程，從懦弱到堅強，給予生命正向的意義。