Browsing by Issue Date, starting with "2008-03-24"

Now showing 1 - 20 of 55904

Anomalous p-channel amorphous oxide transistors based on tin oxide and their complementary circuits
(2008-03-24)
Ou, Chun-Wei
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Ho, Zhong Yo
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Chuang, You-Che
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Cheng, Shiau-Shin
;
Wu, Meng-Chyi
In this article, we report the fabrication of SnO(2) thin film transistors (TFTs) fabricated by reactive evaporation. Different from the previous reports, the fabricated TFTs exhibit p-type conductivity in its undoped form. The postdeposition annealing temperature was tuned to achieve p-channel SnO(2) TFTs. The on/ off ratio and the field-effect mobility were similar to 10(3) and 0.011 cm(2)/V s, respectively. To demonstrate inverter circuit, two devices with different threshold voltages were combined and an output gain of 2.8 was achieved. The realization of p-channel oxide TFTs would open up new challenges in the area of transparent electronics. (C) 2008 American Institute of Physics.
InN nanotips as excellent field emitters
(2008-03-24)
Wang, K. R.
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Lin, S. J.
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Tu, L. W.
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Chen, M.
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Chen, Q. Y.
Unidirectional single crystalline InN nanoemitters were fabricated on the silicon (111) substrate via ion etching. These InN nanoemitters showed excellent field emission properties with the threshold field as low as 0.9 V/mu m based on the criterion of 1 mu A/cm(2) field emission current density. This superior property is ascribed to the double enhancement of (1) the geometrical factor of the InN nanostructures and (2) the inherently high carrier concentration of the degenerate InN semiconductor with surface electron accumulation layer induced downward band bending effect that significantly reduced the effective electron tunneling barrier even under very low external field. (c) 2008 American Institute of Physics.
Nanocrystallization and interfacial tension of sol-gel derived memory
(2008-03-24)
Wu, Chi-Chang
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Tsai, Yi-Jen
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Chu, Min-Ching
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Yang, Shao-Ming
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Ko, Fu-Hsiang
The formation of the nanocrystals (NCs) by using the sol-gel spin-coating method at various annealing temperatures had been studied. The film started to form the islands at 600 degrees C annealing, and finally transferred into NCs at 900 degrees C. A model was proposed to explain the transformation of thin film. The morphology of sol-gel thin film at 600 degrees C annealing was varied and had higher interfacial energy. The crystallized process at 900 degrees C annealing could minimize the energy. The retention for 900 degrees C annealed sample exhibited less than 30% charge loss after 10(6) s at 125 degrees C measurement. (c) 2008 American Institute of Physics.
Quick convergecast in ZigBee beacon-enabled tree-based wireless sensor networks
(2008-03-25)
Pan, Meng-Shiuan
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Tseng, Yu-Chee
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資訊工程學系
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Department of Computer Science
Convergecast is a fundamental operation in wireless sensor networks. Existing convergecast solutions have focused on reducing latency and energy consumption. However, a good design should be compliant to standards, in addition to considering these factors. Based on this observation, this paper defines a minimum delay beacon scheduling problem for quick convergecast in ZigBee tree-based wireless sensor networks and proves that this problem is NP-complete. Our formulation is compliant with the low-power design of IEEE 802.15.4. We then propose optimal solutions for special cases and heuristic algorithms for general cases. Simulation results show that the proposed algorithms can indeed achieve quick convergecast. (C) 2007 Elsevier B.V. All rights reserved.
Image-based fuzzy control system
(2008-03-27)
Chen, G. -M.
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Lin, P. -Z.
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Wang, W. -Y.
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Lee, T. -T.
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Wang, C. -H.
A novel image-based fuzzy control (IBFC) scheme is developed to imitate the way humans use visual information to control objects. A CCD camera gathers images of the controlled plant, and a simple algorithm analyses the images. The proposed image analysis algorithm utilises image information more intuitively than visual servo control systems. The difference between a reference image and the current image is numerically expressed and directly used by a fuzzy control system using a human-like control law. To investigate the effectiveness of the proposed IBFC scheme, it is applied to control an inverted pendulum system. Simulation results show that the IBFC system can achieve favourable tracking performance without prior knowledge of the controlled plant.
Theoretical investigation of molecular properties of the first excited state of the phenoxyl radical
(2008-03-27)
Cheng, Chi-Wen
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Lee, Yuan-Pern
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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
A theoretical study of molecular, electronic, and vibrational properties of the first excited state of the phenoxyl radical, A B-2(2), is presented. The calculated molecular geometries, vertical and adiabatic excitation energies, and harmonic vibrational frequencies are compared with analogous results obtained for the ground state. The calculated excitation energies correspond well to experimental data. The harmonic vibrational frequencies of the A B-2(2) and the ground state are similar except for modes involving the vibrations of the CO bond.
Two-tier call admission control algorithm in IEEE 802.11 WLAN
(2008-03-27)
Huang, Ching Yao
;
Shih, Yuan Hwai
The present invention discloses a two-tier call admission control algorithm in IEEE 802.11 WLAN. The two-tier call admission control algorithm is given to improve the overall system throughput and guarantee the quality of service of every single user in the WLAN.
A novel technique for measuring pico-scale flow rate of a liquid solution using a microchannel
(2008-03-28)
Chang, Kow-Ming
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Chao, Kuo-Yi
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Lin, Kun-Feng
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電子工程學系及電子研究所
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Department of Electronics Engineering and Institute of Electronics
As micrototal analysis system (mu-TAS) becoming more extensively used, techniques for fabricating microchannels, microactuators, and measuring systems are becoming increasingly important. This study describes a novel method for fabricating a closed microchannel that can be used to measure the pico-scale flow rate of a liquid solution with an accuracy of better than 1 pL/s. The flow rate of 9 pL/s is calculated from the measurements. Without any high temperature or high-voltage processing, the microchannel can be integrated in the complementary metal-oxide-semiconductor (CMOS) microfluidic system and the fabricating process involves only some standard CMOS processes and common materials. The batch fabrication of a single integrated circuit (IC) chip is essential to reaching the goal of a system in one chip. (C) 2007 Elsevier B.V. All rights reserved.
《我要成為空服員》
(2008-03-30)
姚翔
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Department of Communication and Technology
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傳播與科技學系
一本有關空服員面試的聖經
人際關係　不簡單的課題
(2008-03-30)
吳念慈
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Department of Communication and Technology
;
傳播與科技學系
獨善其身那套觀念，在現今社會中已經不再適用；在凡事都講求合作的團體生活中，人際關係這門學分就顯得相當重要了。無論在學校、出社會、甚至在軍中，朋友間、室友間、或是情侶之間。
從新好男孩看男孩團體興衰
(2008-03-30)
鍾瑄
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Department of Communication and Technology
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傳播與科技學系
從BSB談男孩團體興衰史
小攤販大愛心
(2008-03-30)
張雅雯
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Department of Communication and Technology
;
傳播與科技學系
清大宵夜街的小攤販大愛心
《發條橘子》邪惡伸展的極致
(2008-03-30)
謝甄芳
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Department of Communication and Technology
;
傳播與科技學系
發條橘子
《黑金企業》刻劃貪婪人性
(2008-03-30)
郭品君
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Department of Communication and Technology
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傳播與科技學系
開採石油發跡過程、人性的探討
馬耀‧比吼─用影像透露原住民心聲
(2008-03-30)
李怡萱
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Department of Communication and Technology
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傳播與科技學系
原住民導演馬耀‧比吼專訪
《看不見的西藏》變了色的藏文化
(2008-03-30)
陳貞儒
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Department of Communication and Technology
;
傳播與科技學系
日前，西藏紀念抗暴49周年的示威遊行，卻演變成暴力衝突，並遭中國政府血腥鎮壓。著名西藏女作家唯色，在事件發生後，即遭中國政府軟禁。對照她在《看不見的西藏》書中所寫：「曾經，眾神守護著我們的家園，像喇嘛守護著我們的家園，像獒犬守護著帳房，但今天，眾神已遠去…」情境竟是如此相似。
鐵爪下的三鶯部落
(2008-03-30)
賴奕如
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Department of Communication and Technology
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傳播與科技學系
河岸旁的部落，被政府視為是破壞市容、有礙觀瞻。拆掉了他們的家，他們又該去哪？
荒誕破碎《一刀未剪的童年》
(2008-03-30)
薛怡凡
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Department of Communication and Technology
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傳播與科技學系
作者Augusten Burroughs的童年回憶錄。整本書以青少年的角度揭露出現實的社會百態，且以幽默的手法道出作者瘋狂且黑暗的童年世界。
集結自由廣場台灣藏人同胞聲援西藏
(2008-03-30)
蘇芳儀
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Department of Communication and Technology
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傳播與科技學系
西藏青年對西藏文化的看法及期許，以及他們參與絕食抗議的現場情形。
《垂死的肉身》
(2008-03-30)
黃夙蓮
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Department of Communication and Technology
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傳播與科技學系
書評 - 垂死的肉身