Browsing by Issue Date, starting with "2018-03-14"

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Plasmon-mediated charge dynamics and photoactivity enhancement for Au-decorated ZnO nanocrystals
(2018-03-14)
Chiu, Yi-Hsuan
;
Chang, Kao-Der
;
Hsu, Yung-Jung
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材料科學與工程學系
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Department of Materials Science and Engineering
With the capability of localizing optical energy via surface plasmon resonance (SPR), plasmonic Au nanostructures hold great promise for enhancing the solar water splitting of semiconductor photocatalysts. While the content of Au plays a critical role in mediating interfacial charge transfer, its quantitative influence on the efficiency of plasmon-assisted water splitting is still not fully understood. This work aimed to explore the correlations among plasmonic metal content, SPR-mediated charge transfer and electromagnetic response, and the resultant photoactivity enhancement toward photoelectrochemical (PEC) water splitting. The PEC system was constructed by employing Au particle-decorated ZnO nanocrystals (ZnO-Au) as the plasmonic photoanode. Time-resolved photoluminescence spectroscopy and finite-difference time-domain simulations were utilized to evaluate the optimal Au content which attained effective charge separation and imposed a significant SPR effect for achieving the largest photoactivity enhancement. The charge transfer at the photoanode/electrolyte interface and its dependence on the Au content were examined with electrochemical impedance analysis, which manifested the effectiveness of the optimal Au content in facilitating the hole transfer kinetics. The present study reports a technical advance in the realization of the quantitative effect of Au for designing sophisticated plasmonic PEC systems that enabled efficient solar-to-fuel energy conversion.
Polarizability tensor invariants of H-2, HD, and D-2
(2018-03-14)
Raj, Ankit
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Hamaguchi, Hiro-o
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Witek, Henryk A.
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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 report an exhaustive compilation of wavelength-dependent matrix elements over the mean polarizability ((alpha) over bar) and polarizability anisotropy (gamma) operators for the rovibrational states of the H-2, HD, and D-2 molecules together with an accompanying computer program for their evaluation. The matrix elements can be readily evaluated using the provided codes for rovibrational states with J = 0-15 and v = 0-4 and for any laser wavelengths in the interval 182.25-1320.6 nm corresponding to popular, commercially available lasers. The presented results substantially extend the scope of the data available in the literature, both in respect of the rovibrational transitions analyzed and the range of covered laser frequencies. The presented detailed tabulation of accurate polarizability tensor invariants is essential for successful realization of our main long-term goal: developing a universal standard for determining absolute Raman cross sections and absolute Raman intensities in experimental Rayleigh and Raman scattering studies of molecules. Published by AIP Publishing.
Influences of Conjugation Length on Organic Field-Effect Transistor Performances and Thin Film Structures of Diketopyrrolopyrrole-Oligomers
(2018-03-14)
Huang, Yi-Fan
;
Chang, Shu-Ting
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Wu, Kuan-Yi
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Wu, San-Lien
;
Ciou, Guan-Ting
Here, two diketopyrrolopyrrole (DPP)-based oligomers, DPP-4T and DPP-6T, are studied to reveal the influences of conjugation length on thin-film morphology and organic field-effect transistor (OFET) performances. PDMS-assisted crystallization in a solvent-annealing chamber is applied to prepare crystal arrays of DPP-4T and DPP-6T to optimize the quality of charge channels for OFET characterizations. To deliver insights into microstructure and morphology of thin films, a characterization procedure for determining molecular packing in thin film and crystallinity of the crystal arrays is presented via grazing incidence wide-angle X-ray scattering, electron diffraction, and lattice simulation software package (Cerius2). With the lattice parameters derived from analyses of grazing incidence wide-angle X-ray scattering (GIWAXS) and electron diffraction (ED), the lattice modeling results indicate that the inferior organic field-effect transistor (OFET) performances of DPP-6T are attributed to longer pi-stacking distance. Also, less-ordered molecular arrangement and lower continuity of crystalline domains, both of which are revealed from crystallinity results, lead to lower mobility of DPP-6T. In this case, longer conjugated backbones with more conformational degrees of freedom thus cause inherent crystal defects during the crystal growth process, despite the potential to enhance intermolecular pi-orbital overlap. Therefore, to achieve better OFET performance, suitable backbone length makes conjugated oligomers give high intermolecular pi-orbital overlap and low density of structural disorder, which are the priorities for constructing good charge channel.
Mechanical properties of three-dimensional ordered macroporous Ni foam
(2018-03-15)
Liao, Chen-Hong
;
Hung, Pei-Sung
;
Cheng, Yu
;
Chang, Shou-Yi
;
Wua, Pu-Wei
We employ a sequential electrophoresis and electrodeposition approach to fabricate a large-area ordered macroporous Ni foam in 5 x 5 cm(2) via a template route. Images from scanning electron microscope exhibit hierarchical structures with hexagonally-arranged pores and interconnected pore channels. For as-prepared and annealed ordered macroporous Ni foams, the loading-depth profiles from nano indentation show typical elastic and plastic deformation. Upon annealing, moderate growth in grain size is observed, resulting in lower hardness and Young's modulus. In contrast, for disordered macroporous Ni foam and solid Ni film, nano indentation results reveal larger hardness and undetermined Young's modulus. The ordered macroporous foam reveals hardness that is 22% of that of solid Ni film, a value close to its theoretic packing density of 24%. (C) 2017 Elsevier B.V. All rights reserved.
A predictive model for acute allograft rejection of liver transplantation
(2018-03-15)
Liu, Chien-Liang
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Soong, Ruey-Shyang
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Lee, Wei-Chen
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Chen, De-Hsuan
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Hsu, Shang-Hwa
Orthotopic liver transplantation (OLT) has become an increasingly used treatment for end-stage liver disease. However, acute allograft rejection is still a problem in postoperative care of liver transplantation with immunosuppressive therapy and it can lead to allograft damage and harm the survival of liver transplantation patient. This work proposes to use data-driven approach to build a predictive model for acute rejection. We consider not only prediction accuracy, but also interpretability of the prediction outcome in building the predictive model, so that the medical staffs can identify how the prediction is induced from data. The experiments use the real data provided by liver transplantation intensive care unit (ICU) of Chang Gung Memorial Hospital, Taiwan. In this work, the data is from a medical center, in which the patient data ranges from 2004 to 2013, and the number of data records is approximately 2 million. To the best of our knowledge, this is the first work using a large-scale database to focus on liver transplantation and generate interpretable rules that could be used by medical staffs. We compare with several methods, including SVM, ANN and random forest, and the experimental results indicate that the proposed method is comparative, and provides interpretable results. Central to the proposed method is to consider interpretability, and the goal is to provide interpretable results for the medical staffs to make decisions. The proposed transformation algorithms belong to data-driven approaches, so they could be applied to other intelligent or expert systems. Moreover, the outcomes are presented in rule format, which could be used by medical staffs and other expert systems. (C) 2017 Elsevier Ltd. All rights reserved.
Multi-Sensor Image Fusion Based on Interval Type-2 Fuzzy Sets and Regional Features in Nonsubsampled Shearlet Transform Domain
(2018-03-15)
Jiang, Qian
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Jin, Xin
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Hou, Jingyu
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Lee, Shin-Jye
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Yao, Shaowen
Multi-scale geometric analysis, one of the most often-used multi-sensor image fusion (MSIF) techniques, can offer outstanding performance during extracting the features of source image. Interval type-2 fuzzy sets (Type-2 FS) have a good prospect in image fusion field, because it can effectively address the uncertain and fuzzy problem in image fusion for selecting the high-quality pixels or coefficients of source images. We try to extend the application fields of Type-2 FS and improve the performance of MSIF; therefore, this paper presents a hybrid method by combining the local spatial frequency (LSF) with interval Type-2 FS in nonsubsampled shearlet transform (NSST) domain. NSST is used to decompose source images, and interval Type-2 FS and LSF is employed to extract the regional features of source images; so it can extract and fuse the detailed features of different source images accurately. First, NSST is performed to decompose the source images into low frequency and high frequency sub-images. Second, LSF-based fusion rule is applied to fuse low frequency sub-images. Thirdly, a novel fusion process based on interval Type-2 FS is designed to fuse high frequency sub-images. At last, inverse NSST2 (INSST) is implemented to reconstruct the fused images. The experimental and contrastive results of different image sets show that the proposed method is an effective MSIF scheme, which can achieve better fusion effect than the existing representative methods.
動作判定裝置及動作感測器
(2018-03-16)
賴義澤
;
蔡育燐
;
李鎮宜
一種動作感測器包含一適於被該使用者穿戴或攜帶的殼體、一用來持續感測該殼體的移動以獲得對應於每一單位時間的一筆重力加速度資料的加速度感測單元及一角加速度感測單元。該角加速度感測單元回應於一控制信號而啟動或不啟動，並在啟動時，感測該殼體的移動以獲得一筆角加速度資料。該動作感測器根據該控制訊號可在一正常狀態與一省電狀態之間切換，當該動作感測器操作在該正常狀態時，該角加速度感測單元回應於該控制信號而啟動，當該動作感測器操作在該省電狀態時，該角加速度感測單元回應於該控制信號而不啟動。
氣體偵測器
(2018-03-16)
冉曉雯
;
孟心飛
;
王建隆
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莊明諺
;
張良有
一種氣體偵測器用來與一電性檢測器搭配使用。該氣體偵測器包含一個用於電連接該電性檢測器的電極單元及一個感測單元。該電極單元包括一層第一電極層及一層與該第一電極層相間隔設置的第二電極層。該第二電極層包括兩個相對的電極表面以及形成有複數個貫穿該等電極表面的貫孔。該感測單元包括一層連接該第一電極層及該第二電極層且用來與待測氣體作用的感測層。該感測層包括至少一種具有官能基團的感測材料，且該官能基團選自於芴基系基團、含有三苯胺基系及芴基系的基團、伸苯基伸乙烯基系基團或含有二噻吩苯并二噻吩基系及噻吩并噻吩基系的基團。
半導體氣體感測裝置的製作方法及其半導體氣體感測裝置
(2018-03-16)
邱俊誠
;
蔡尚瑋
一種半導體氣體感測裝置的製作方法，包含半成品準備步驟、氣體感測槽形成步驟，及感測膜形成步驟。半成品準備步驟是準備氣體感測半成品，包括具有第一面與第二面的基板、分別形成在第一面的迴授電路單元，及加熱感測單元，加熱感測單元具有由第一面依序設置第一絕緣層、感測電極、第二絕緣層、微加熱器，及第三絕緣層。氣體感測槽形成步驟從第二面蝕刻基板至第一絕緣層，讓感測電極露出，形成與該微加熱器反向的氣體感測槽。感測膜形成步驟形成覆蓋感測電極的感測膜。本發明還提供以前述方法製成的半導體氣體感測裝置。
氣體感測器的製作方法
(2018-03-16)
孟心飛
;
冉曉雯
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陳兆軒
;
張宇帆
一種氣體感測器的製作方法，包含一準備步驟、一感測單元形成步驟，及一金屬層形成步驟。該準備步驟是準備一導電基板。該感測單元形成步驟是在該導電基板上形成一感測單元。該金屬層形成步驟是以蒸鍍法在該感測單元上形成一層連續且厚度足以自行產生多個感測孔洞的金屬層，而讓該感測單元的表面自該等感測孔洞露出。
台灣的三級棒球教室
(2018-03-18)
鄭頎
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Department of Communication and Technology
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傳播與科技學系
【台灣好「棒」——國球總體檢】

基層棒球是棒球運動的根本，台灣的基層棒球體制也和台灣棒球的發展息息相關。
又愛又恨　女性玩家的特殊處境
(2018-03-18)
陳映瑜
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Department of Communication and Technology
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傳播與科技學系
【電競界的透明天花板】

遊戲裡很多妹子到底是福是禍？淺談遊戲中女性玩家的尷尬處境。
夢想在路上　自我探索之旅　
(2018-03-18)
林明慧
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Department of Communication and Technology
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傳播與科技學系
【觀光旅遊】

一個27歲的台灣男孩、一輛摩托車、一段深具意義的自我革命之旅。
公共自行車　定樁無樁大不同
(2018-03-18)
嚴銘浩
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Department of Communication and Technology
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傳播與科技學系
【公共自行車議題】

公共自行車共分為無樁式及定樁式，其差別為何？此圖表將為大家一一解答。
台灣沒偶像團？2017年台團分析
(2018-03-18)
巫尹文
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Department of Communication and Technology
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傳播與科技學系
【好想支持台灣自己的團體！台灣偶像團體的困境與未來發展】

台灣沒有偶像團體了？其實在2017年裡，仍有十團發行作品，更有六團新團。但之中又存在著哪些現象呢？
總編輯的話
(2018-03-18)
甘愷璇
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Department of Communication and Technology
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傳播與科技學系
本期為喀報282期，稿件共計7篇。此次為記者專題報導的初試啼聲。本期頭題為《又愛又恨女性玩家的特殊處境》，層層分析電競遊戲中女性玩家所面臨的矛盾處境。
為甚麼吃巧克力會讓心情變好？
(2018-03-18)
楊佩臻
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Department of Communication and Technology
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傳播與科技學系
【飲食與健康】

為甚麼巧克力會影響心情呢？本文運用圖表讓你更清晰明瞭其中的作用。
客家傳統歌謠小百科
(2018-03-18)
凃易暄
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Department of Communication and Technology
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傳播與科技學系
【客家音樂　從傳統到現代】

以圖表簡介客家傳統歌謠，分為歌曲部分（山歌）與音樂部分（八音與樂器）。
Electrochemical reactivity of carbonaceous materials for water treatment and energy recovery
(2018-03-18)
Doong, Ruey-An
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Chang, Pei-Yi
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Hsu, Chia-wen
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環境工程研究所
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Institute of Environmental Engineering
Non-flickering 100 m RGB visible light communication transmission based on a CMOS image sensor
(2018-03-19)
Chow, Chi-Wai
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Shiu, Ruei-Jie
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Liu, Yen-Chun
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Liu, Yang
;
Yeh, Chien-Hung
We demonstrate a non-flickering 100 m long-distance RGB visible light communication (VLC) transmission based on a complementary-metal-oxide-semiconductor (CMOS) camera. Experimental bit-error rate (BER) measurements under different camera ISO values and different transmission distances are evaluated. Here, we also experimentally reveal that the rolling shutter effect- (RSE) based VLC system cannot work at long distance transmission, and the under-sampled modulation- (USM) based VLC system is a good choice. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement