Browsing by Issue Date, starting with "2014-04-24"

Now showing 1 - 20 of 26794

Investigation of LaAlO3/ZrO2/a-InGaZnO thin-film transistors using atmospheric pressure plasma jet
(2014-04-24)
Wu, Chien-Hung
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Huang, Hau-Yuan
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Wang, Shui-Jinn
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Chang, Kow-Ming
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Hsu, Hsin-Yu
Amorphous indium-gallium-zinc-oxide thin-film transistors (a-IGZO-TFTs) with the LaAlO3/ZrO2 gate dielectric stack employing a novel atmospheric pressure plasma jet process that results in small subthreshold swing and low threshold voltage are proposed and fabricated. The influence of post-deposition annealing (PDA) temperature on LaAlO3/ZrO2 gate dielectric stack and device performance was investigated. The equivalent oxide thickness of the LaAlO3/ZrO2 dielectric stack decreases from 11.5 nm without annealing to 7 nm after a 500 degrees C annealing was applied. The LaAlO3/ZrO2/a-InGaZnO TFT with a 500 degrees C annealing exhibits a small subthreshold swing of 77 mV.dec(-1), a high field-effect mobility of 9 cm(2).V-1.s(-1) and an excellent current ratio of 1.8 x 10(7), which could be attributed to the improved gate dielectric quality by the PDA. The LaAlO3/ZrO2/a-InGaZnO TFTs with excellent gate control ability allow the device to operate at a low operating voltage with low power consumption.
Theoretical evaluation of diffusion coefficients of (Al2O3)(n) clusters in different bath gases
(2014-04-24)
Sharipov, Alexander S.
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Loukhovitski, Boris I.
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Tsai, Chuen-Jinn
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Starik, Alexander M.
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環境工程研究所
The binary diffusion coefficients of two low lying isomers of (Al2O3)(n), n = 1...4, clusters in different bath gases, that most frequently met in the nature and in the technical applications: H-2, N-2, O-2, CO, H2O as well as their self-diffusion coefficients have been calculated on the basis of kinetic theory and dipole reduced formalism. The parameters of interaction potential have been determined taking into account the contributions of a dispersion, dipole-dipole and dipole-induced dipole interactions between alumina clusters and bath molecules. The dipole moments, polarizabilities and collision diameters of clusters have been obtained by using quantum chemical calculations of cluster structure. The approximations for temperature dependencies of diffusion coefficients for two low-lying isomers of each considered alumina clusters are reported. It is demonstrated that an account for the contributions of the second for each type of clusters does not affect substantially the value of net diffusion coefficient. The diffusion coefficients of the isomers of small (Al2O3)(n) clusters can differ notably in the case when their dipole moments are distinct and they interact with strongly dipole molecules.
Universal Ferroelectric Switching Dynamics of Vinylidene Fluoride-trifluoroethylene Copolymer Films
(2014-04-24)
Hu, Wei Jin
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Juo, Deng-Ming
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You, Lu
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Wang, Junling
;
Chen, Yi-Chun
In this work, switching dynamics of poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymer films are investigated over unprecedentedly wide ranges of temperature and electric field. Remarkably, domain switching of copolymer films obeys well the classical domain nucleation and growth model although the origin of ferroelectricity in organic ferroelectric materials inherently differs from the inorganic counterparts. A lower coercivity limit of 50 MV/m and 180 degrees domain wall energy of 60 mJ/m(2) are determined for P(VDF-TrFE) films. Furthermore, we discover in copolymer films an anomalous temperature-dependent crossover behavior between two power-law scaling regimes of frequency-dependent coercivity, which is attributed to the transition between flow and creep motions of domain walls. Our observations shed new light on the switching dynamics of semi-crystalline ferroelectric polymers, and such understandings are critical for realizing their reliable applications.
Homogeneous barrier modulation of TaOx/TiO2 bilayers for ultra-high endurance three-dimensional storage-class memory
(2014-04-25)
Hsu, Chung-Wei
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Wang, Yu-Fen
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Wan, Chia-Chen
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Wang, I-Ting
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Chou, Chun-Tse
Three-dimensional vertical resistive-switching random access memory (V-RRAM) is the most anticipated candidate for fulfilling the strict requirements of the disruptive storage-class memory technology, including low bit cost, fast access time, low-power nonvolatile storage, and excellent endurance. However, an essential self-selecting resistive-switching cell that satisfies these requirements has yet to be developed. In this study, we developed a TaOx/TiO2 double-layer V-RRAM containing numerous highly desired features, including: (1) a self-rectifying ratio of up to 10(3) with a sub-mu A operating current, (2) little cycle-to-cycle and layer-to-layer variation, (3) a steep vertical sidewall profile for high-density integration, (4) forming-free and self-compliance characteristics for a simple peripheral circuit design, and (5) an extrapolated endurance of over 10(15) cycles at 100 degrees C. Furthermore, the switching and self-rectifying mechanisms were successfully modeled using oxygen ion migration and homogeneous barrier modulation. We also suggest the new possibility of monolithically integrating working and storage memory by exploiting a unique tradeoff between retention time and endurance.
RegPhos 2.0: an updated resource to explore protein kinase-substrate phosphorylation networks in mammals
(2014-04-25)
Huang, Kai-Yao
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Wu, Hsin-Yi
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Chen, Yi-Ju
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Lu, Cheng-Tsung
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Su, Min-Gang
Protein phosphorylation catalyzed by kinases plays crucial roles in regulating a variety of intracellular processes. Owing to an increasing number of in vivo phosphorylation sites that have been identified by mass spectrometry (MS)-based proteomics, the RegPhos, available online at http://csb.cse.yzu.edu.tw/RegPhos2/, was developed to explore protein phosphorylation networks in human. In this update, we not only enhance the data content in human but also investigate kinase-substrate phosphorylation networks in mouse and rat. The experimentally validated phosphorylation sites as well as their catalytic kinases were extracted from public resources, and MS/MS phosphopeptides were manually curated from research articles. RegPhos 2.0 aims to provide a more comprehensive view of intracellular signaling networks by integrating the information of metabolic pathways and protein-protein interactions. A case study shows that analyzing the phosphoproteome profile of time-dependent cell activation obtained from Liquid chromatography-mass spectrometry (LC-MS/MS) analysis, the RegPhos deciphered not only the consistent scheme in B cell receptor (BCR) signaling pathway but also novel regulatory molecules that may involve in it. With an attempt to help users efficiently identify the candidate biomarkers in cancers, 30 microarray experiments, including 39 cancerous versus normal cells, were analyzed for detecting cancer-specific expressed genes coding for kinases and their substrates. Furthermore, this update features an improved web interface to facilitate convenient access to the exploration of phosphorylation networks for a group of genes/proteins. Database URL: http://csb.cse.yzu.edu.tw/RegPhos2/
Role of the Autonomic Nervous System in Atrial Fibrillation Pathophysiology and Therapy
(2014-04-25)
Chen, Peng-Sheng
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Chen, Lan S.
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Fishbein, Michael C.
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Lin, Shien-Fong
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Nattel, Stanley
Autonomic nervous system activation can induce significant and heterogeneous changes of atrial electrophysiology and induce atrial tachyarrhythmias, including atrial tachycardia and atrial fibrillation (AF). The importance of the autonomic nervous system in atrial arrhythmogenesis is also supported by circadian variation in the incidence of symptomatic AF in humans. Methods that reduce autonomic innervation or outflow have been shown to reduce the incidence of spontaneous or induced atrial arrhythmias, suggesting that neuromodulation may be helpful in controlling AF. In this review, we focus on the relationship between the autonomic nervous system and the pathophysiology of AF and the potential benefit and limitations of neuromodulation in the management of this arrhythmia. We conclude that autonomic nerve activity plays an important role in the initiation and maintenance of AF, and modulating autonomic nerve function may contribute to AF control. Potential therapeutic applications include ganglionated plexus ablation, renal sympathetic denervation, cervical vagal nerve stimulation, baroreflex stimulation, cutaneous stimulation, novel drug approaches, and biological therapies. Although the role of the autonomic nervous system has long been recognized, new science and new technologies promise exciting prospects for the future.
Salt-templated synthesis of Ce/Al catalysts supported on mesoporous silica for acetone oxidation
(2014-04-27)
Lin, Liang-Yi
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Bai, Hsunling
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環境工程研究所
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Institute of Environmental Engineering
A series of bimetallic Ce/Al catalysts supported on mesoporous silica catalysts were prepared through fast salt-templated aerosol process in this study. The source of sodium silicate precursor was from the alkali-extraction of the opto-electronic industrial waste. The inorganic salt formed during the silicate acidification process was served as an effective and low-cost template, which could be simply removed by water washing at room temperature. The Ce/Al-SiO2 catalysts were fabricated under various aerosol-spraying temperatures, and the temperature effects on the structural and surface properties were investigated by XRD, nitrogen physisorption measurement, SEM/TEM, ICP-MS, Al-27 MAS-NMR, UV-vis spectra, H-2-TPR and NH3-TPD analyses. The catalytic behavior was further evaluated in terms of acetone oxidation. The results revealed that the catalytic oxidation of acetone is mainly governed by the surface redox property, along with the acidity of the catalysts. The Ce/Al-SiO2-300, with high surface acidity and strong surface reducibility, appeared to have the best acetone catalytic performance at temperatures of 100-300 degrees C and its T-90 was at 165 degrees C under acetone inlet concentration of 1000 ppmv and GHSV of 15,000 h(-1). Furthermore, compared with literature data which catalysts were prepared using commercial silicon source and traditional organic surfactant templates, Ce/Al-SiO2-300 showed a comparable catalytic performance, indicating the great potential application of Ce/Al-SiO2 catalysts for the catalytic oxidation of acetone. (C) 2013 Elsevier B.V. All rights reserved.
職場接軌　研替正夯
(2014-04-27)
高紫娟
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Department of Communication and Technology
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傳播與科技學系
內政部役政署推出新的研發替代役制度，透過役男結合專長所學，在政府欲推動的各項產業中服役，促成產學接軌。
籃球DJ　熱血與衝勁
(2014-04-27)
柯惠文
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Department of Communication and Technology
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傳播與科技學系
SBL的球迷一定不陌生這個中氣十足的主持人，他是林志彥，投入SBL已經有十一年之久。
韓國諜報新紀元
(2014-04-27)
徐冠軒
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Department of Communication and Technology
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傳播與科技學系
韓國近年來大吹諜報電影的風潮。去年就有兩部是以北韓間諜為主軸的諜報片——【偉大的隱藏者】和【同窗生】。
傳統轉型　觀光工廠的崛起
(2014-04-27)
吳羽涵
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Department of Communication and Technology
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傳播與科技學系
至今不少傳統產業轉型為觀光工廠，其中工廠設置的地點，更是符合交通便利的要素，也吸引不少民眾前來體驗。
嘻哈傳教士　饒舌頌福音
(2014-04-27)
邱薏真
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Department of Communication and Technology
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傳播與科技學系
「基督饒舌嘻哈」是什麼？人們對嘻哈的認知通常是負面的；而對基督福音往往是尊敬，這兩者如何混為一談？
農業新浪潮　改革兼保障
(2014-04-27)
陳祥豪
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Department of Communication and Technology
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傳播與科技學系
務農也許在大部分的人眼裡吃力不討好，但有一群人卻放棄都市生活，走回最原始的田埂間默默付出，耕織理想。
總編輯的話
(2014-04-27)
王怡方
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Department of Communication and Technology
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傳播與科技學系
本期為喀報一八九期，雖然篇數不多，但內容與媒材皆相當豐富，並扣合時事議題。
陸市場封閉　台片登陸難
(2014-04-27)
陳彥文
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Department of Communication and Technology
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傳播與科技學系
兩岸簽訂ECFA後雖然取消對台灣的配額限制，卻仍需受到中國審查，相比之下台灣市場顯得開放許多。
倆佰甲　新農讚起來
(2014-04-27)
林婉婷
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Department of Communication and Technology
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傳播與科技學系
位於宜蘭縣員山鄉的倆佰甲，在去年由楊文全所創立，宗旨為新農的育成與陪伴。
人性盲點　難以面對的真相
(2014-04-27)
李盈如
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Department of Communication and Technology
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傳播與科技學系
自「法律」觀念誕生以來，人類期許它帶來真相，然而，當事實非自己所相信時，逃避便成為人性最大的弱點。
復活之愛　重建家的意義
(2014-04-27)
張萬邦
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Department of Communication and Technology
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傳播與科技學系
今年復活節，新竹區復活節聯合慶典要將一份愛傳給台灣所有的家庭。
抗議歌聲起　溫柔而堅毅
(2014-04-27)
劉冠伶
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Department of Communication and Technology
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傳播與科技學系
在過去通常保持政治中立的歌手或藝術家，如今紛紛走上街頭，高唱自己的想法，為社運活動的參與者打氣。
街友求職大不易
(2014-04-27)
陳佩瑄
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Department of Communication and Technology
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傳播與科技學系
在路上時常會看到街友的身影，他們究竟是遇到了什麼困難，讓他們只能露宿街頭，無家可歸。