Browsing by Issue Date, starting with "2013-12-13"

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Shrinkage regression-based methods for microarray missing value imputation
(2013-12-13)
Wang, Hsiuying
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Chiu, Chia-Chun
;
Wu, Yi-Ching
;
Wu, Wei-Sheng
;
統計學研究所
Background: Missing values commonly occur in the microarray data, which usually contain more than 5% missing values with up to 90% of genes affected. Inaccurate missing value estimation results in reducing the power of downstream microarray data analyses. Many types of methods have been developed to estimate missing values. Among them, the regression-based methods are very popular and have been shown to perform better than the other types of methods in many testing microarray datasets. Results: To further improve the performances of the regression-based methods, we propose shrinkage regression-based methods. Our methods take the advantage of the correlation structure in the microarray data and select similar genes for the target gene by Pearson correlation coefficients. Besides, our methods incorporate the least squares principle, utilize a shrinkage estimation approach to adjust the coefficients of the regression model, and then use the new coefficients to estimate missing values. Simulation results show that the proposed methods provide more accurate missing value estimation in six testing microarray datasets than the existing regression-based methods do. Conclusions: Imputation of missing values is a very important aspect of microarray data analyses because most of the downstream analyses require a complete dataset. Therefore, exploring accurate and efficient methods for estimating missing values has become an essential issue. Since our proposed shrinkage regression-based methods can provide accurate missing value estimation, they are competitive alternatives to the existing regression-based methods.
A hybrid electrochemical advanced oxidation/microfiltration system using BDD/Ti anode for acid yellow 36 dye wastewater treatment
(2013-12-13)
Juang, Yaju
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Nurhayati, Ervin
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Huang, Chihpin
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Pan, Jill R.
;
Huang, Shihming
Conductive diamond is an excellent electrode material due to its resistance to corrosion, wide potential window, and mechanical stability. Diamond doped with boron (BDD) as the anode in electrooxidation (EO) reactor to degrade trace but refractory pollutants from wastewater has received enormous attention recently. In this study, an innovative BDD/Ti electrooxidation-microfiltration (EO/MF) hybrid system was designed and tested for simultaneous removal of refractory organics and particles in dye wastewater. The system was fabricated in a tubular fashion with BDD/Ti as the anode, stainless steel (SS) as the cathode, and a ceramic membrane in between for filtration practice. The synthetic dye wastewater contained acid yellow 36 (AY-36) as the model organic pollutant while kaolin was added to make up the particles in the suspension. The experiments were operated in a continuous up-flow mode at pH 3 with a current density of 30 mA/cm(2). A complete COD removal and more than 90% removals of color and turbidity from the dye wastewater were achieved, suggesting that particles can be removed via MF would not hinder the performance of EO. In conclusion, the single stage hybrid system of BDD/Ti-EO/MF can be a potent treatment process for dye wastewater. (C) 2013 Elsevier B.V. All rights reserved.
音樂不設限　古典跨電子樂
(2013-12-15)
黃筱雯
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Department of Communication and Technology
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傳播與科技學系
琳賽．斯特林邊演奏邊跳舞的獨特表演方式，搭配電子樂或遊戲裝扮，成為透過網路視頻走紅的小提琴演奏家。
享受吧　一家人旅行
(2013-12-15)
張萬邦
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Department of Communication and Technology
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傳播與科技學系
不同人對旅行所下的定義都有所不同，一起見證張家獨特的旅行方式吧！
堅持對的事　在地的呼喊
(2013-12-15)
徐冠軒
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Department of Communication and Technology
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傳播與科技學系
王浩宇，活出不同於一般七年級生的價值，創立「我是中壢人」粉絲團，對社會持續貢獻著。
Colorimetric detection of Al3+ ions using triazole-ether functionalized gold nanoparticles
(2013-12-15)
Chen, Yu-Ching
;
Lee, I-Lin
;
Sung, Yi-Ming
;
Wu, Shu-Pao
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應用化學系
A sensitive, selective colorimetric Al3+ detection method has been developed by using triazole-ether functionalized gold nanoparticles (TTP-AuNPs). Gold nanoparticles were prepared by reducing HAuCl4 with sodium borohydride in the presence of 5-(1,2-dithiolan-3-yl)-N-(prop-2-yn-1-yl)pentanamide (TP). The azide part of 2-[2-(2-azidoethoxy)ethoxy]ethanol and the acetylene part of TP were combined to form a triazole structure through a click reaction. Aggregation of TTP-AuNPs was induced immediately in the presence of Al3+ ions, yielding a color change from red to blue. This Al3+-induced aggregation of TTP-AuNPs was monitored first with the naked eye and then UV-vis spectroscopy with a detection limit of 18.0 nM. The TTP-AuNPs showed excellent selectivity for Al3+, compared to other metal ions (Ag+, Ca2+, Cd2+, Co2+, Cu2+, Cr3+, Fe2+, Fe3+, Hg2+, Mg2+, Mn2+, Ni2+, Pb2+, and Zn2+). In addition, TTP-AuNPs were used to detect Al3+ in sea water samples, with low interference. (C) 2013 Elsevier B.V. All rights reserved.
末日浩劫　小鎮重生
(2013-12-15)
莊媛婷
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Department of Communication and Technology
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傳播與科技學系
《我們曾是公民：只來了一半的末日》一書描寫油荒危機下，即將來臨的末日。但人民的互助合作也創造出希望。
堅強不羈　重塑分裂人生
(2013-12-15)
柯惠文
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Department of Communication and Technology
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傳播與科技學系
分裂人格為書本常用的題材，《請問我是誰》，沒有艱深的心理學理論，以簡單的文字邏輯推演出安琪拉堅強的故事。
出走　作為成年禮的壯遊
(2013-12-15)
陳祥豪
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Department of Communication and Technology
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傳播與科技學系
二十歲代表成年、能負起責任。隻身出國一趟壯遊不僅開闊視野、也考驗自己照顧自己的能力。
Laser-unzipped carbon nanotube based glucose sensor for separated structure of enzyme modified field effect transistor
(2013-12-15)
Tsai, Wan-Lin
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Chien, Yun-Shan
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Yang, Po-Yu
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Lee, I-Che
;
Wang, Kuang-Yu
A glucose sensing film composed of unzipped multiwalled carbon nanotubes (MWCNTs) via continuous-wave laser irradiation is investigated. Some structural defects decorate on MWCNTs after an acid treatment, and the MWCNTs are unzipped into sheet-shaped layers initiated from these defects after the laser irradiation. The laser-irradiated carbon nanotube thin films (CNTFs) possess higher conductance owing to larger contact area, and the side edges of unzipped CNTs could act as sensing sites for hydrogen ions. Thus the laser-irradiated CNTF as a glucose sensing film could achieve a higher sensitivity of 0.302 mV (mg/dl)(-1), equal to 7.55 mV(mg/dl)(-1) per centimeter square, and a larger linearity of 0.9947 than the as-sprayed one. Moreover, the fully low-temperature processes of this work also reveal the potentials for flexible and disposable biosensors. (C) 2013 Published by Elsevier B.V.
公主魔王勇者　友誼鐵三角
(2013-12-15)
蔡乙佳
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Department of Communication and Technology
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傳播與科技學系
這是一個真實的故事，發生在三個女孩：公主、魔王與勇者之間，關於友情的故事。
擁抱愛　無障礙青春
(2013-12-15)
劉冠伶
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Department of Communication and Technology
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傳播與科技學系
永遠帶著開朗笑容的黃筱智，用她的樂觀改變自己的人生，更感動了生命裡的每個人。
Real-time investigation of the structural evolution of electrodes in a commercial lithium-ion battery containing a V-added LiFePO4 cathode using in-situ neutron powder diffraction
(2013-12-15)
Hu, Chih-Wei
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Sharma, Neeraj
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Chiang, Ching-Yu
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Su, Hui-Chia
;
Peterson, Vanessa K.
In-situ neutron powder diffraction was employed to investigate the structural evolution of the electrode materials in a commercial lithium-ion battery used for electric buses in Taiwan. The battery, containing a vanadium-added LiFePO4 cathode, does not exhibit a delayed phase transition between LiFePO4 (triphylite) and FePO4 (heterosite) suggesting that the delayed phase transition can be suppressed through the use of vanadium-added LiFePO4 cathodes, which also enhances the capacity and prolongs the cycle life of these batteries. Furthermore, we characterize the readily reversible structural change of the anode (LixC6 where 0 < x <= 1) and correlate this to battery voltage. (C) 2013 Elsevier B.V. All rights reserved.
公益旅行家　海外志工出走　
(2013-12-15)
陳韋琪
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Department of Communication and Technology
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傳播與科技學系
朱永祥，曾經穿金戴銀的他，生活衣食無虞，大三那年卻拋下無限光景的前程，一頭栽入社福工作二十多年。
人生你我他　療癒系漢堡店
(2013-12-15)
韓惠宇
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Department of Communication and Technology
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傳播與科技學系
在創作中不乏死亡課題的吉本芭娜娜，這次將場景鎖定在一間懷舊風的漢堡店，帶領讀者去窺探死亡以及生命的真諦。
總編輯的話
(2013-12-15)
李若甄
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Department of Communication and Technology
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傳播與科技學系
本周一七八期喀報共十八篇，頭題為書評《末日浩劫　小鎮重生》，內容除了有精闢的分析作者這次作品與過往的差異外，還提及石油危機等現今社會議題，引人入勝。次題照片故事《毅力　熱血　啦啦隊》即時性高，拍出競技啦啦隊的高難度技巧，令人驚艷。
毅力　熱血　啦啦隊
(2013-12-15)
魏意蓁
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Department of Communication and Technology
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傳播與科技學系
啦啦隊協會在台北市立大學舉辦第九屆全國啦啦隊錦標賽，選手們蓄勢待發，準備展現訓練數月的成果。
啦啦錦標賽　跳出熱血節奏
(2013-12-15)
江欣薇
;
林妍君
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Department of Communication and Technology
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傳播與科技學系
二〇一三年全國啦啦隊錦標賽，於十二月十四日在台北市立大學天母校區拉開序幕。
Single-Mode, High-Speed, and High-Power Vertical-Cavity Surface-Emitting Lasers at 850 nm for Short to Medium Reach (2 km) Optical Interconnects
(2013-12-15)
Shi, Jin-Wei
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Wei, Zhi-Rui
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Chi, Kai-Lun
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Jiang, Jia-Wei
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Wun, Jhih-Min
The vertical-cavity surface-emitting lasers (VCSELs) with high single-mode (narrow linewidth) output power are essential to minimize chromatic dispersion and to further improve the bit-rate distance product in a multimode fiber, which has a significant propagation loss (similar to 3.5 dB/km) at 850 nm wavelength. Here, we demonstrate the detailed design considerations and fabrication of a single-mode, high-power, and high-speed VCSELs at the 850 nm wavelength with oxide-relief and Zn-diffusion apertures for the application of short (0.3 km) to medium reach (2 km) optical interconnects. By optimizing the relative geometric sizes between two such apertures in our demonstrated 850-nm VCSELs, we can not only attain high single-mode output power (similar to 6.5 mW), but also with a reasonable threshold current (< 2.0 mA). Furthermore, the spatial hole burning effect induced low-frequency roll off can also be minimized in our optimized structure to obtain a maximum data rate up to 26 Gbit/s. The record-high bit rate-distance products for OM4 MMF transmission under ON-OFF keying (14 Gbit/s x 2.0 km) modulation formats have been successfully demonstrated by the use of our VCSEL.
玩聚場　喚醒失落的艋舺
(2013-12-15)
邱薏真
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Department of Communication and Technology
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傳播與科技學系
位於艋舺大道上的「玩聚場」，是由創作者臨時打造的公共生活空間，引入多樣活動，喚醒居民及大眾對街道公共生活的感受，匯集社區中的鄰里意識，並創造社會大眾的討論與關心。