Browsing by Issue Date, starting with "2013-09-19"

Now showing 1 - 20 of 30679

Large-scale modular biofiltration system for effective odor removal in a composting facility
(2013-09-19)
Lin, Yueh-Hsien
;
Chen, Yu-Pei
;
Ho, Kuo-Ling
;
Lee, Tsung-Yih
;
Tseng, Ching-Ping
Several different foul odors such as nitrogen-containing groups, sulfur-containing groups, and short-chain fatty-acids commonly emitted from composting facilities. In this study, an experimental laboratory-scale bioreactor was scaled up to build a large-scale modular biofiltration system that can process 34m(3)min(-1)waste gases. This modular reactor system was proven effective in eliminating odors, with a 97% removal efficiency for 96ppm ammonia, a 98% removal efficiency for 220ppm amines, and a 100% removal efficiency of other odorous substances. The results of operational parameters indicate that this modular biofiltration system offers long-term operational stability. Specifically, a low pressure drop (<45 mmH(2)O m(-1)) was observed, indicating that the packing carrier in bioreactor units does not require frequent replacement. Thus, this modular biofiltration system can be used in field applications to eliminate various odors with compact working volume.
Non-polar plane of wurtzite structure material
(2013-09-19)
CHANG Li
;
HO Yen-Teng
The present invention relates to a method for growing a novel non-polar (13 40) plane epitaxy layer of wurtzite structure, which comprises the following steps: providing a single crystal oxide with perovskite structure; using a plane of the single crystal oxide as a substrate; and forming a non-polar (13 40) plane epitaxy layer of wurtzite semiconductors on the plane of the single crystal oxide by a vapor deposition process. The present invention also provides an epitaxy layer having non-polar (13 40) plane obtained according to the aforementioned method.
IMAGE CONTROL SYSTEM ABLE TO DETECT ELECTROOCULOGRAPHY
(2013-09-19)
LIN Chin-Teng
;
Chen Zhong-Ho
;
Liao Lun-De
;
Wang I-Jan
An image control system able to detect electrooculography (EOG) is provided. The system detects EOG signals of a user through an electrooculography detection device and wirelessly transmits the signals to an external signal processing device. The external signal processing device calculates a position the user is staring at according to the signal received and presents on a display unit a sharp image of the position. Thereby, the present invention makes the user enjoy the feeling of watching real objects although the user is viewing a photo presented on the display in fact. Thus is optimized the visional quality in viewing photos.
Femtosecond Pulse-Width Dependent Trapping and Directional Ejection Dynamics of Dielectric Nanoparticles
(2013-09-19)
Chiang, Wei-Yi
;
Usman, Anwar
;
Masuhara, Hiroshi
;
應用化學系
;
應用化學系分子科學碩博班
We demonstrate that laser pulse duration, which determines its impulsive peak power, is an effective parameter to control the number of optically trapped dielectric nanoparticles, their ejections along the directions perpendicular to polarization vector, and their migration distances from the trapping site. This ability to controllably confine and eject the nanoparticle is explained by pulse width-dependent optical forces exerted on nanoparticles in the trapping site and ratio between the repulsive and attractive forces. We also show that the directional ejections occur only when the number of nanoparticles confined in the trapping site exceeds a definite threshold. We interpret our data by considering the formation of transient assembly of the optically confined nanoparticles, partial ejection of the assembly, and subsequent filling of the trapping site. The understanding of optical trapping and directional ejections by ultrashort laser pulses paves the way to optically controlled manipulation and sorting of nanoparticles.
Comparative study on MoS2 and WS2 for electrocatalytic water splitting
(2013-09-19)
Chen, Tzu-Yin
;
Chang, Yung-Huang
;
Hsu, Chang-Lung
;
Wei, Kung-Hwa
;
Chiang, Chia-Ying
Replacing Pt by earth abundant catalysts is one of the most important tasks toward potential large-scale HER applications. Among many potential candidates, low cost and earth abundant transition metal dichalcogenides such as MoS2 and WS2 have been promising as good H-2 evolution electrocatalysts when they are engineered into the structures with active sites. In this work, we have performed systematic studies on the catalytic reactivity of both MoS2 and WS2 materials produced by one-step and scalable thermolysis from (NH4)(2)WS4 and (NH4)(2)MoS4 precursors respectively. Structural analysis shows that these materials prepared at a higher thermolysis temperature exhibit higher crystallinity. The H-2 evolution electrocatalysts efficiency for the MoS2 prepared at a lower temperature is higher than those at higher temperatures, where amorphous MoS2 or S-2(2-) species instead of crystalline MoS2 is the main active site. By contrast, crystalline WS2 prepared at high temperature is identified to be the key reaction site. Both catalysts display excellent efficiency and durability as an electrocatalyst operating in acidic electrolytes. This work provides fundamental insights for further design and preparation of emergent metal dichalcogenide catalysts, beneficial for the development in clean energy. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Endoglucanase Peripheral Loops Facilitate Complexation of Glucan Chains on Cellulose via Adaptive Coupling to the Emergent Substrate Structures
(2013-09-19)
Lin, Yuchun
;
Beckham, Gregg T.
;
Himmel, Michael E.
;
Crowley, Michael F.
;
Chu, Jhih-Wei
We examine how the catalytic domain of a glycoside hydrolase family 7 endoglucanase catalytic domain (Cel7B CD) facilitates complexation of cellulose chains from a crystal surface. With direct relevance to the science of biofuel production, this problem also represents a model system of biopolymer processing by proteins in Nature. Interactions of Cel7B CD with a cellulose microfibril along different paths of complexation are characterized by mapping the atomistic fluctuations recorded in free-energy simulations onto the parameters of a coarse-grain model. The resulting patterns of protein-biopolymer couplings also uncover the sequence signatures of the enzyme in peeling off glucan chains from the microfibril substrate. We show that the semiopen active site of Cel7B CD exhibits similar barriers and free energies of complexation over two distinct routes; namely, scooping of a chain into the active-site cleft and threading from the chain end into the channel. On the other hand, the complexation energetics strongly depends on the surface packing of the targeted chain and the resulting interaction sites with the enzyme. A revealed principle is that Cel7B CD facilitates cellulose deconstruction via adaptive coupling to the emergent substrate. The flexible, peripheral segments of the protein outside of the active-site cleft are able to accommodate the varying features of cellulose along the simulated paths of complexation. The general strategy of linking physics-based molecular interactions to protein sequence could also be helpful in elucidating how other protein machines process biopolymers.
High-side driver circuit
(2013-09-19)
CHEN Tsung-Lin
;
CHANG Edward Yi
;
CHIENG Wei-Hua
;
CHENG Stone
;
JENG Shyr-Long
The present invention provides a high-side driver circuit including a power transistor, the first transistor, the second transistor, the second capacitor, the second diode, a start-up circuit. The start-up circuit is coupled between a resistor and the second capacitor to complete a gate driving circuit. And, the aforementioned resistor can either be the gate resistance of the power transistor or an external resistor. The design of start-up circuit enables the functionality of the bootstrap capacitor of being charged to a designate voltage level. Thus, the depletion-mode transistor can be controlled to turn on/off without a floating voltage source or a negative voltage source.
Current limit circuit apparatus
(2013-09-19)
CHEN Tsung-Lin
;
CHANG Edward Yi
;
CHIENG Wei-Hua
;
CHENG Stone
;
JENG Shyr-Long
The present invention provides a current limit circuit apparatus, coupled with the gate of a GaN transistor. The current limit circuit comprises a diode, a first transistor, a second transistor, a first resistor, a second resistor, a third resistor and a fourth resistor. The source and the drain of the first transistor couple with the diode. The source of the second transistor couples with the gate of the first transistor. The source of the first transistor couples with the first transistor. The source of the second transistor couples with the second resistor. The third resistor couples with the fourth resistor and the gate of the first transistor. The first transistor turned off and the gate current is limited. When the current of the gate of the GaN transistor exceeds the predetermined value, the breakdown voltage is increased by limiting the gate current.
Temperature-dependent failure mechanism of SnAg solder joints with Cu metallization after current stressing: Experimentation and analysis
(2013-09-21)
Lin, C. K.
;
Tsao, Wei An
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Liang, Y. C.
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Chen, Chih
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材料科學與工程學系
Temperature-dependent electromigration failure was investigated in solder joints with Cu metallization at 126 degrees C, 136 degrees C, 158 degrees C, 172 degrees C, and 185 degrees C. At 126 degrees C and 136 degrees C, voids formed at the interface of Cu6Sn5 intermetallic compounds and the solder layer. However, at temperature 158 degrees C and above, extensive Cu dissolution and thickening of Cu6Sn5 occurred, and few voids were observed. We proposed a model considering the flux divergency at the interface. At temperatures below 131 degrees C, the electromigration flux leaving the interface is larger than the in-coming flux. Yet, the in-coming Cu electromigration flux surpasses the out-going flux at temperatures above 131 degrees C. This model successfully explains the experimental results. (C) 2013 AIP Publishing LLC.
可見光式光觸媒複合物及其形成方法
(2013-09-21)
黃志彬
;
袁如馨
;
謝文彬
;
黃嘉宏
;
曾堯宣
本發明係提供一種包括光觸媒及奈米零價鐵觸媒之可見光式光觸媒複合物及其形成方法，其中該光觸媒與零價鐵的重量比為約100：0.01至100：15。本發明之複合觸媒組成物之光觸媒擔載於鐵觸媒表面。
液晶顯示面板及其掃描線補償電路
(2013-09-21)
戴亞翔
一種液晶顯示面板的掃描線補償電路，包括一補償掃描線與至少一補償單元。補償單元耦接至一關閉電壓與補償掃描線，並透過一掃描線耦接多個畫素單元。掃描線傳送一掃描訊號至上述畫素單元，並於掃描訊號的致能期間開啟上述畫素單元。補償單元接收一關閉訊號，並於關閉訊號的致能期間將上述畫素單元連接至關閉電壓，以關閉上述畫素單元。
An apparatus for studying spallation neutrons in the Aberdeen Tunnel laboratory
(2013-09-21)
Blyth, S. C.
;
Chan, Y. L.
;
Chen, X. C.
;
Ch, M. C.
;
Hahn, R. L.
In this paper, we describe the design, construction and performance of an apparatus installed in the Aberdeen Tunnel laboratory in Hong Kong for studying spallation neutrons induced by cosmic-ray muons under a vertical rock overburden of 611 m water equivalent (m.w.e.). The apparatus comprises six horizontal layers of plastic-scintillator hodoscopes for determining the direction and position of the incident cosmic-ray muons. Sandwiched between the hodoscope planes is a neutron detector filled with 650 kg of liquid scintillator doped with about 0.06% of Gadolinium by weight for improving the efficiency of detecting the spallation neutrons. Performance of the apparatus is also presented. (C) 2013 Elsevier B.V. All rights reserved.
無線網路環境中之繞送方法及繞送路徑之修復方法
(2013-09-21)
賴俊羽
;
黃貴笠
;
王瑞堂
;
曾建超
;
吳昭男
本發明提供一種無線網路環境中非對稱式的繞送方法及繞送路徑之修復方法。在無線網路環境中包括至少一管理單元、至少一閘道器及複數行動節點，管理單元與閘道器相連。當一新行動節點加入網路時，即傳送訊息至管理單元以取得識別碼，網路中每個節點都記錄相對於管理單元之深度，使得整個網路由內而外的形成以管理單元為中心之坡度(Gradient)。當行動節點有資料欲傳送給管理單元時，可向鄰近節點表格(neighbor table)中深度(depth)較低的任何一個行動節點傳送封包，亦即往距離管理單元較近的行動節點繞送封包。當網路後端有資料欲透過管理單元傳送給行動節點時，管理單元採用來源繞送(source routing)的方式將封包繞送給行動節點。當有一行動節點損壞需修復繞送路徑時，行動節點傳送一控制訊息給管理單元以更新管理單元到行動節點之下行繞送路徑，並選擇一個鄰近節點做為父節點，再以父節點到管理單元之路徑做為行動節點到管理單元之路徑。
我很棒還是需參考前人之作
(2013-09-22)
陳聖文
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Department of Communication and Technology
;
傳播與科技學系
新手上路請多指教
(2013-09-22)
陳彥文
;
Department of Communication and Technology
;
傳播與科技學系
金喀獎帶你看到好喀報
(2013-09-22)
陳佩瑄
;
Department of Communication and Technology
;
傳播與科技學系
喀報肝膽相照
(2013-09-22)
王怡方
;
Department of Communication and Technology
;
傳播與科技學系
新的起點　全力衝刺
(2013-09-22)
吳羽涵
;
Department of Communication and Technology
;
傳播與科技學系
104新手上路
(2013-09-22)
柯惠文
;
Department of Communication and Technology
;
傳播與科技學系
喀報報新手上路
(2013-09-22)
聶薇庭
;
Department of Communication and Technology
;
傳播與科技學系
記者的工作在於對這個社會保持高度的觀察力以及注意力，我從《喀報》裡看見過去記者群們對於社會一角的持續洞察，也從過去的經驗記取未來一年身為《喀報》記者的課題。