Browsing by Issue Date, starting with "2009-11-02"

Now showing 1 - 20 of 49406

Electrical characteristics dependence on the channel fin aspect ratio of multi-fin field effect transistors
(2009-11-02)
Cheng, Hui-Wen
;
Li, Yiming
;
傳播研究所
;
電子工程學系及電子研究所
;
Institute of Communication Studies
In this work we investigate the impact of the fin number and structure on device dc and dynamic behaviors of multi-fin field effect transistor (FET) circuits. Based on the same channel volume, multi-fin FETs with different fin aspect ratio (AR equivalent to fin height/fin width) are explored using an experimentally validated three-dimensional device simulation. The multi-fin FinFET (AR = 2) has a better channel controllability than the tri-gate (AR = 1) and the quasi-planar (AR = 0.5) FETs. Besides, the 6T SRAM with triple-fin FinFETs provides the largest static noise margin because of the largest transconductance. Notably, though the FinFETs are with a large effective fin width and driving current, the larger gate capacitance may limit the intrinsic device gate delay. The transient characteristics of multi-fin inverters are further examined with different load capacitance (C(load)). As C(load) is increased, the impact of the device intrinsic gate capacitance on transient characteristcs is decreased and the delay time compared with that of single-fin inverters is smaller due to being dominated by the driving current of the transistor. Consequently, the multi-fin FinFET circuits exhibit a smallest delay time. The results of the study provide an insight into the dc and transient characteristics of multi-fin transistors and associated digital circuits.
A flexible drug delivery chip for the magnetically-control led release of anti-epileptic drugs
(2009-11-03)
Huang, Wei-Chen
;
Hu, Shang-Hsiu
;
Liu, Kun-Ho
;
Chen, San-Yuan
;
Liu, Dean-Mo
A flexible drug delivery device was designed and fabricated using electrophoretic deposition of drug-carrying magnetic core-shell Fe(3)O(4) at SiO(2) nanoparticles onto an electrically conductive flexible PET substrate. The PET substrate was first patterned to a desired layout and subjected to deposition. In doing so, a uniform and nanoporous membrane could be produced. After lamination of the patterned membranes, a final chip-like device of thickness less than 0.5 mm is formed that is used for controlled delivery of an anti-epileptic drug, i.e., ethosuximide (ESM). The release of useful drugs can be controlled by directly modulating the magnetic field, and the chip is capable of demonstrating a variety of release profiles (i.e., slow release, sustained release, step-wise release and burst release profiles). These profiles can follow a wide spectrum of patterns ranging from zero to pulsatile release kinetics depending on the mode of magnetic operation. When the magnetic field was removed, the release behavior was instantly ceased, and vice versa. A preliminary in-vivo study using Long-Evans rat model has demonstrated a significant reduction in spike-wave discharge after the ESM was burst released from the chip under the same magnetic induction as in-vitro, indicating the potential application of the drug delivery chip. The flexible and membrane-like drug delivery chip utilizes drug-carrying magnetic nanoparticles as the building blocks that ensure a rapid and precise response to magnetic stimulus. Moreover, the flexible chip may offer advantages over conventional drug delivery devices by improvement of dosing precision, ease of operation, wider versatility of elution pattern, and better compliance. (C) 2009 Elsevier B.V. All rights reserved.
Effect of anodic dissolution in multi-element nanoparticles on methanol electro-oxidation
(2009-11-03)
Hsieh, Yi-Fan
;
Yeh, Kung-Yu
;
Wu, Pu-Wei
;
Hsieh, Yu-Chi
;
Lin, Pang
Radio frequency sputter deposition was used to deposit multi-element nanoparticles on carbon clothes for methanol electro-oxidation. Results from energy dispersive spectroscope confirmed the composition was Ft(35)Fe(12)Co(12)Ni(20)Cu(12)Ag(9). X-ray diffraction pattern suggested a fcc phase. An electrochemical de-alloying treatment was conducted in an acidic electrolyte with multiple potential sweeps at a scan rate of 20 mV/s for 0-0.3,0-0.5, and 0-0.7 V, respectively. Images from scanning electron microscope after anodic dissolutions demonstrated considerable variations in surface morphologies. Measurements on hydrogen desorption also revealed substantial increase in electrochemical active surface area. Current responses from cyclic voltammetry indicated the sample of 0-0.5 V anodic dissolution with notable enhancement. In mass activities, the same sample exhibited a comparable value to that Of Pt(43)Ru(57) (C) 2009 Elsevier B.V. All rights reserved.
台灣少年恁仔，How to think global and act Local?
(2009-11-04)
謝怡芬
;
開放教育推動中心
;
Open Education Office
課程日期： 2009年11月04日(三) 演講人：Janet，謝怡芬小姐－「瘋台灣」節目主持人內容摘要：外表光鮮亮麗的Janet，似乎活得都比別人精彩。然而，走出螢光幕前的光環，Janet要讓我們看到的是更多生命的選項，以另一種角度體會人生中美麗的境遇。「有時候機會來了，就看自己怎麼選擇」，Janet說道。內容：影音實況影音(*.wmv檔)
交大e-News第059期
(2009-11-05)
Secretariat
;
國立交通大學秘書室
Configuration Effects of H-Bonded Sites and Rigid Core Lengths on H-Bonded Banana-Shaped Liquid Crystalline Supramolecules Consisting of Symmetric Trimers and Asymmetric Heterodimers
(2009-11-05)
Wang, Ling-Yung
;
Chiang, I-Hung
;
Yang, Po-Jen
;
Li, Wan-Sheung
;
Chao, I-To
Several series of novel banana-shaped H-bonded symmetric trimers (with two H-bonds) and asymmetric heterodimers (with one H-bond) were self-assembled by appropriate molar ratios of proton donors (H-donors) and acceptors (H-acceptors). The influences of H-bonded linking positions and aromatic ring numbers (4-8 aromatic rings in the rigid cores) as well as the chain lengths (n, m = 12 or 16, respectively, in the flexible parts) on the mesomorphism and the switching behavior of the bent-core supramolecules were evaluated and theoretically analyzed. Except for the supramolecular structures with longer rigid cores or shorter flexible chains possessing the rectangular columnar (Col(r) or Bl) phase, the SmC(A)P(A) phase was revealed in most supramolecular asymmetric heterodimers and switched to the SmC(S)P(F) phase by applying electric fields. The polar smectic C phase was dominated for those with H-bonded sites apart from the core center. Interestingly, the SmA and nematic phases were observed in H-bonded asymmetric dimers with H-bonded sites close to the core center, which theoretically proved that the polar smectic C phase was disfavored due to an unfavorable bend angle (smaller than the lower limit of 110 degrees) in the lowest-energy H-bonded conformer. Compared with the fully covalently bonded analogue, lower transition temperatures and lower threshold voltages were developed in the H-bonded asymmetric dimers with the polar smectic C phase. On the basis of the theoretical calculations of molecular modeling, the existence of polar switching behavior in the polar smectic C phase of asymmetric heterodimers; was proven to be associated with their configurations with higher dipole moments and suitable bend angles. Furthermore, the lack of polar switching behavior in supramolecular symmetric trimers, which exhibited the regular SmC phase with weak electrical stabilities, was related to their configurations with smaller dipole moments and confirmed by theoretical calculations.
Why is Indigo Photostable over Extremely Long Periods?
(2009-11-05)
Iwakura, Izumi
;
Yabushita, Atushi
;
Kobayashi, Takayoshi
;
電子物理學系
;
Department of Electrophysics
This experimental work clarifies the mechanism for the Ultra-photostability of indigo carmine by direct observation of a transition state using a sub 5-fs laser pulse. The molecular structural changes during the photoexcited proton-transfer process were traced as the time-dependent instantaneous frequency of molecular vibrations. The mono-alcohol intermediate generated by proton transfer via stepwise path was found to be unstable, and it immediately reverted to indigo carmine. This regression to the reactant is the reason for the ultraphotostability of indigo over extremely long periods.
Traceless Synthesis of Hydantoin Fused Tetrahydro-beta-carboline on Ionic Liquid Support in Green Media
(2009-11-05)
Maiti, Barnali
;
Chanda, Kaushik
;
Sun, Chung-Ming
;
應用化學系
;
Department of Applied Chemistry
A novel ionic liquid (IL) supported, green synthetic protocol has been developed toward the synthesis of oxo and thio hydantoin analogues tethered with tetrahydro-beta-carboline by the use of focused microwave irradiation. IL-bound tryptophan underwent a Pictet-Spengler reaction with various carbonyl compounds to generate the IL-immobilized tetrahydro-beta-carbolines in aqueous isopropanol media. Subsequent reaction of substituted tetra hydro-beta-carboline derivatives with various isocyanates and isothiocyanate provided a three-dimensional combinatorial library in a traceless fashion.
Dynamics of vibrational and electronic coherences in the electronic excited state studied in a negative-time range
(2009-11-06)
Kobayashi, Takayoshi
;
Yabushita, Atsushi
;
電子物理學系
;
Department of Electrophysics
Femtosecond pump-probe spectroscopy signals in a negative-time range (i.e., when the probe pulse precedes pump pulse) were analyzed to study the dynamics of electronic and vibrational coherences in the photodissociation of oxyhemoglobin. The decay time of the electronic coherence between the ground and Q-band electronic states is found to be 45 +/- 5 fs. The dephasing times of the vibrational modes of several frequencies in the ground state have been determined. Those in the excited state are found to be similar to 26 fs. The absence or presence of the modes in the negative-time range due to the excited state wavepacket is explained in terms of the mode coupling strength. (C) 2009 Elsevier B.V. All rights reserved.
Photodissociation cross sections of ClOOCl at 248.4 and 266 nm
(2009-11-07)
Lien, Chien-Yu
;
Lin, Wei-Yen
;
Chen, Hsueh-Ying
;
Huang, Wen-Tsung
;
Jin, Bing
This study utilized a mass-resolved detection of ClOOCl to determine its photodissociation cross section, which is the product of the absorption cross section and dissociation quantum yield. An effusive molecular beam of ClOOCl was generated and its photodissociation probability was determined through measuring the decrease in the ClOOCl beam intensity upon laser irradiation. By comparing with a reference molecule, the absolute cross sections of ClOOCl were obtained without knowing its absolute concentration. The determined cross section of ClOOCl at 248.4 nm is (8.85 +/- 0.42)x10(-18) cm(2) at 200 K, significantly larger than previously reported values. The temperature dependence of the cross section was investigated at 248.4 nm in the range of 160-260 K; only a very small and negative temperature effect was observed. Because 248.4 nm is very close to the peak of the UV absorption band of ClOOCl, this work provides a new calibration point for normalizing relative absorption spectra of ClOOCl. In this work, the photodissociation cross section at 266 nm and 200 K was also reported to be (4.13 +/- 0.21)x10(-18) cm(2).
Hard repulsive barrier in hot adatom motion during dissociative adsorption of oxygen on Ag(100)
(2009-11-07)
Hsieh, Ming-Feng
;
Lin, Deng-Sung
;
Gawronski, Heiko
;
Morgenstern, Karina
;
物理研究所
Random pairing simulation and low temperature scanning tunneling microscopy (STM) are used to investigate the detailed O(2) dissociative adsorption processes at 200 K for various coverages. The distribution of oxygen adatoms shows a strong repulsion between the adsorbates with a radius of similar to 0.8 nm. The comparison between STM results and simulation reveals two prominent pairing distances of 2 and 4 nm and their branching ratio is about 2:1. These findings shed new light on the origin of the large intrapair distances found and on the process behind the empirical "eight-site rule.".
《購物狂的異想世界》
(2009-11-08)
林雨萱
;
Department of Communication and Technology
;
傳播與科技學系
2009年2月上映的好萊塢電影《購物狂的異想世界》（Confessions of a Shopaholic），由蘇菲˙金索拉的暢銷書《購物狂的異想世界》及《購物狂挑戰曼哈頓》改編而登上大銀幕，故事的場景也從英國倫敦搬到美國時尚之都紐約。主角麗貝卡˙布倫伍德，是個熱愛購物、享受刷卡快感的購物狂，她與好友蘇西住在一起，房間內成山成堆的服飾與配件，是她即使在大學畢業後就開始工作，仍負債累累的原因。
新中的OS
(2009-11-08)
賴合新
;
Department of Communication and Technology
;
傳播與科技學系
如果說「天將降大任於斯人也，必先苦其心志、勞其筋骨」，那麼感謝上天，喀報第62期編輯台感謝您將大任降於吾等，那麼也給所有傳科人一些保庇吧！
一百公分的視界
(2009-11-08)
林乃絹
;
Department of Communication and Technology
;
傳播與科技學系
少了一隻腳的日子比想像中漫長，女孩學會在輪椅上看世界，一百公分的視野比過去還要廣闊，失去往前衝的能力，卻擁有細細領悟生命的機會......
Do Impossible ─ Janet
(2009-11-08)
樂嘉妮
;
Department of Communication and Technology
;
傳播與科技學系
本名謝怡芬的Janet，在旅遊節目主持界中，占有一席之地。已經連續兩年入圍金鐘「綜合節目主持人獎」的她，用自己獨到的主持方式，帶領觀眾用活潑的角度發現台灣。
來自挪威的歡笑雜技
(2009-11-08)
林詩雯
;
Department of Communication and Technology
;
傳播與科技學系
今年交大藝術季難得邀請來自"挪威"的北極星劇團，為我們表演在歐洲的藝術節中時常出現的雜耍、火舞、小丑劇等等，讓台灣民眾感受異國劇團不一樣的風情。觀眾總是忍不住對踩著高蹺的表演者發出驚嘆；生動活潑的表情也讓觀眾笑開懷；與觀眾互動頻繁，觀眾也成為北極星劇團裡的可愛表演者，有此體驗，讓人相當難忘!
閃耀SHINee　姊姊的羅曼史
(2009-11-08)
陳怡
;
Department of Communication and Technology
;
傳播與科技學系
以〈Ring Ding Dong〉一曲連續拿下四座冠軍的韓國新生代男子團體SHINee，出道以來擄獲許多姊姊粉絲，如今他們由男孩蛻變為男人，吸睛能力再度瘋狂飆升。
夜半夢瀰風城時
(2009-11-08)
溫苔詠
;
Department of Communication and Technology
;
傳播與科技學系
很多時候只能看見都市喧囂的一面，那......有沒有看過別種風情呢？
民謠搖滾　929的音樂世界
(2009-11-08)
陳怡儒
;
Department of Communication and Technology
;
傳播與科技學系
曾以質樸自然的音樂風味，入圍2004年海洋音樂祭決賽，歷經團員更迭，最後以主唱吳志寧，搭配貝斯手嘟嘟、吉他手黃玠和樂團絲襪小姐主唱小龜的陣容，在2008年10月發行了第二張專輯《也許像星星》。
那一年的熱血少年手指虎
(2009-11-08)
郭伯宇
;
Department of Communication and Technology
;
傳播與科技學系
一個再做不出成績就要面臨失業的粉領族無意中在網路上發現一個龐克樂團的演唱片段，決定藉由簽下這個樂團改變自己的人生，拜訪後才發現影片是二十五年前的，團員已成為中年大叔，面臨失業的粉領族和一群窮困潦倒的中年大叔所組成的龐克樂團，這兩個在現實中皆面臨重大人生危機的組合被迫攜手合作，這將是她們最後一次機會改變自己的人生。