Browsing by Issue Date, starting with "2008-12-15"

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Lithium salt doped conjugated polymers as electron transporting materials for highly efficient blue polymer light-emitting diodes
(2008-12-15)
Huang, Fei
;
Shih, Ping-I
;
Liu, Michelle S.
;
Shu, Ching-Fong
;
Jen, Alex K. -Y.
Highly efficient blue polymer light-emitting diodes (PLEDs) are fabricated using a conjugated polymer, poly[9,9-bis(2-(2-(2-diethanol-amino-ethoxy) ethoxy) ethyl) fluorene-alt-4, 4(')-phenylether] as an electron transporting layer (ETL). It was found that the performance of these blue-emitting devices could be greatly improved if the ETL was doped with LiF or Li(2)CO(3) salts. A bis[(4,6-di-fluorophenyl)-pyridinato-N, C(2)] (picolinate) Ir(III) (FIrpic) complex based blue phosphorescent PLED exhibited a maximum luminance efficiency of 20.3 cd/A with a luminance of 1600 cd/m(2) at the current density of 7.9 mA/cm(2) and drive voltage of 8.0 V.
Functional Nanoparticle-Based Proteomic Strategies for Characterization of Pathogenic Bacteria
(2008-12-15)
Chen, Wei-Jen
;
Tsai, Pei-Jane
;
Chen, Yu-Chie
;
應用化學系
;
Department of Applied Chemistry
Although matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) can be employed to rapidly characterize pathogenic bacteria, bacterial cultures are generally required to obtain sufficient quantities of the bacterial cells prior to MALDI MS analysis. If this time-consuming step could be eliminated, the length of time required for identification of bacterial strains would be greatly reduced. In this paper, we propose an effective means of rapidly identifying bacteria-one that does not require bacterial culturing-using functional nanoparticle-based proteomic strategies that are characterized by extremely short analysis time. In this approach, we used titania-coated magnetic iron oxide nanoparticles (Fe(3)O(4)@TiO(2) NPs) as affinity probes to concentrate the target bacteria. The magnetic properties of the Fe(3)O(4)@TiO(2) NPs allow the conjugated target species to be rapidly isolated from the sample solutions under a magnetic field. Taking advantage of the absorption of the magnetic Fe(3)O(4) NPs in the microwave region of the electromagnetic spectrum, we performed the tryptic digestion of the captured bacteria under microwave heating for only 1-1.5 min prior to MALDI MS analysis. We identified the resulting biomarker ions by combining their MS/MS analysis results with protein database searches. Using this technique, we identified potential biomarker ions representing five Gram-negative bacteria: Escherichia coli O157:H7, uropathogenic E. coli, Shigella sonnei, Pseudomonas aeruginosa, and Klebsiella pneumoniae. Finally, we demonstrated the practical feasibility of using this approach to rapidly characterize bacteria in clinical samples.
Special Issue: Workshop on Scientific Computing in Electronic Engineering of the 2006 International Conference on Computational Science
(2008-12-15)
Li, Yiming
;
Cao, Juncheng
;
Dyshlovenko, Pavel
;
Ezaki, Tatsuya
;
Fjeldly, Tor A.
Design optimization of a current mirror amplifier integrated circuit using a computational statistics technique
(2008-12-15)
Li, Yiming
;
Li, Yih-Lang
;
Yu, Shao-Ming
;
資訊工程學系
;
電信工程研究所
In this work, we implement a Computational statistics technique for design optimization of integrated circuits (ICs). Integration of a well-known circuit simulation software and central composite design method enables us to construct a second-order response surface model (RSM) for each concerned constraint. After Construction of RSMs. we verify the adequacy and accuracy using the normal residual plots and their residual of squares. The constructed models are further employed for design optimization of current mirror amplifier ICs with 0.18 mu m CMOS devices. By considering the voltage gain, cut-off frequency, phase margin, common-mode rejection ratio and slew-rate, six designing parameters including the width and length of different transistors are selected and optimized to fit the targets. (C) 2007 IMACS. Published by Elsevier B.V. All rights reserved.
Absorption spectra in the vacuum ultraviolet region of small molecules in condensed phases
(2008-12-15)
Lu, Hsiao-Chi
;
Chen, Hong-Kai
;
Cheng, Bing-Ming
;
Ogilvie, J. F.
;
材料科學與工程學系
With radiation from a synchrotron we measured the spectra of several small molecular species in the, solid phase at 10K, either pure -O(2), NO, CO(2), N(2)O, H(2)O and NH(3) - or, for NH3 also dispersed in Ar at, molar ratio 1/250, from the onset of absorption in the ultraviolet region until the limits of transmission by crystalline LiF or solid At. In a quantitative treatment of spectral data, we fitted the total absorption profile divided by wavenumber to Gaussian curves of minimal number, and made tentative assignments of electronic transitions and vibrational structure by comparison with spectra of gaseous species. These results illuminate the nature of electronic spectra of samples in solid phases in the vacuum ultraviolet region. (C) 2008 Elsevier B.V. All rights reserved.
Time-resolved photoluminescence of isoelectronic traps in ZnSe1-xTex semiconductor alloys
(2008-12-15)
Lin, Y. C.
;
Chou, W. C.
;
Fan, W. C.
;
Ku, J. T.
;
Ke, F. K.
Kohlrausch's stretched exponential law correlates well with the photoluminescence (PL) decay profiles of ZnSe1-xTex. As the Te concentration increases, the stretching exponent beta initially declines and then monotonically increases. This result can be understood using the hopping-transport and energy transfer model. The increase in the number of isoelectronic Te localized traps can reduce the PL decay rate and increase the linewidth, whereas the hybridization of the Te localized states with the valence-band edge states causes a reduction in both the lifetime and linewidth.
Time-resolved photoluminescence of isoelectronic traps in ZnSe(1-x)Te(x) semiconductor alloys
(2008-12-15)
Lin, Y. C.
;
Chou, W. C.
;
Fan, W. C.
;
Ku, J. T.
;
Ke, F. K.
Kohlrausch's stretched exponential law correlates well with the photoluminescence (PL) decay profiles of ZnSe(1-x)Te(x). As the Te concentration increases, the stretching exponent beta initially declines and then monotonically increases. This result can be understood using the hopping-transport and energy transfer model. The increase in the number of isoelectronic Te localized traps can reduce the PL decay rate and increase the linewidth, whereas the hybridization of the Te localized states with the valence-band edge states causes a reduction in both the lifetime and linewidth.
Electronic design automation using a unified optimization framework
(2008-12-15)
Li, Yiming
;
Yu, Shao-Ming
;
Li, Yih-Lang
;
資訊工程學系
;
電信工程研究所
This work proposes an object-oriented unified optimization framework (UOF) for general problem optimization. Based on biological inspired techniques, numerical deterministic methods, and C++ objective design, the UOF itself has significant potential to perform optimization operations on various problems. The UOF provides basic interlaces to define a general problem and generic solver, enabling these two different research fields to be bridged. The components of the UOF can be separated into problem and solver components. These two parts work independently allowing high-level code to be reused, and rapidly adapted to new problems and solvers. The UOF is customized to deal with several optimization problems. The first experiment involves a well-known discrete combinational problem, wihle the second one studies the robustness for the reverse modeling problem, which is in high demanded by device manufacturing companies. Additionally, experiments are undertaken to determine the capability of the proposed methods in both analog and digital circuit design automation. The final experiment designs antenna for rapidly growing wireless communication. Most experiments are categorized as simulation-based optimization tasks in the microelectronics industry. The results confirm that UOF has excellent flexibility and extensibility to solve these problems successfully. The developed open-source project is publicly available. (C) 2007 IMACS. Published by Elsevier B.V. All rights reserved.
Chaos synchronization by variable strength linear coupling and Lyapunov function derivative in series form
(2008-12-15)
Ge, Zheng-Ming
;
Tsen, Pu-Chien
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機械工程學系
;
Department of Mechanical Engineering
A new general strategy to achieve chaos synchronization by variable strength linear Coupling without another active control is proposed. They give the criteria of chaos synchronization for two identical chaotic systems and two different chaotic dynamic systems with variable strength linear coupling. In this method, the time derivative of Lyapunov function in series form is firstly used. Lorenz system, Duffing system, Rossler system and Hyper-Rossler system are presented as simulated examples. (C) 2007 Elsevier Ltd. All rights reserved.
Electronic relaxation and vibrational dynamics in a thiophene oligomer studied under the same experimental condition with a sub-5 fs laser
(2008-12-16)
Wang, Zhuan
;
Kobayashi, Takayoshi
;
電子物理學系
;
Department of Electrophysics
Using a sub-5 fs pulse laser, the pump-probe experiment was performed on a quinoid thiophene derivative and both electronic relaxation and vibrational dynamics were clarified with the same experimental data. From the data, two population decay times of the lowest electronic excited state were determined to be 200 fs and 1.8 ps, which can be explained by the assumption that the 2(1)A(g) state lies below the exciton 1(1)B(u) state together with the very low fluorescence quantum efficiency. The relaxation process after excitation by the pump pulse was studied to be 1(1)B(u) -> 1(1)B(u)* -> 2(1)A(g) -> 1(1)A(g). According to the experimental data, the location of the energy level was also discussed. The electronic dephasing time was determined to be 64 +/- 4 fs by utilizing the data in the 'negative time' range. The vibrational dephasing time constant of the most strongly coupled mode with frequency of 1466 cm(-1) was determined to be 520 +/- 20 fs from the widths of the corresponding Fourier power spectra.
採用低電壓元件之混合電壓石英振盪電路
(2008-12-16)
柯明道
;
廖宏泰
本發明揭露一種採用低電壓元件之混合電壓石英振盪電路。該混合電壓石英振盪電路包含一輸入接點、一輸出接點、一反相器、一N型電晶體及一P型電晶體。該輸入接點係用以接收一外部時脈信號。該反相器具有一輸入端和一輸出端。該N型電晶體之閘極係電連接至一參考電壓源,其汲極和源極則分別連接至該輸入接點及該反相器之輸入端。該P型電晶體之閘極係電連接至該反相器之輸出端,其汲極和源極則分別連接至該反相器之輸入端及該參考電壓源。該外部時脈信號之一高邏輯準位可高於該參考電壓源所提供之一參考電壓。
經典與大愛
(2008-12-16)
黃同弘
;
開放教育推動中心
;
Open Education Office
課程日期： 2008年12月16日(三) 演講人：黃同弘先生內容摘要：在本次演講中，黃主編以經典雜誌為例，介紹一份有理想的平面媒體的製作過程，從規劃、採訪、撰寫、編輯、印刷到出售的各種困難及問題，說明了經典雜誌對文化理想的堅持，也具體闡述了媒體的教育責任。內容：影音實況影音(*.flv檔)
一種利用奈米柱狀結構提升發光二極體光輸出效率之方法
(2008-12-16)
黃泓文
;
盧廷昌
;
邱清華
;
郭浩中
;
王興宗
本發明為一種利用光電化學(PEC)氧化技術形成具有奈米柱狀結構(Nano Rod)之發光二極體技術,首先在發光二極體的表面鍍上一層薄膜金屬層,經熱處理後形成金屬顆粒遮罩,進行蝕刻沒有遮罩保護的部分,再將金屬遮罩移除以形成奈米柱狀結構。接著將形成奈米柱狀結構的發光二極體進行光電化學氧化,即通過一定電壓並照射汞燈,故除正型半導體材料外,材料之表面積均可形成一氧化層,最後再鍍上金屬層,進行導通正型半導體材料以形成具有奈米柱狀結構之發光二極體。
柱状ナノ構造体（ナノロッド）を利用し発光ダイオード（ＬＥＤ）の発光効率を引き上げる方法
(2008-12-18)
黄泓文
;
盧廷昌
;
邱清華
;
郭浩中
;
王興宗
【課題】光電気化学（PHOTOELECTROCHEMICAL ,PEC)反応を利用して酸化反応を起こし、柱状ナノ構造体を有する発光ダイオード（ＬＥＤ）を形成する。【解決手段】発光ダイオード（ＬＥＤ）の表面に薄膜金属層をめっきし、それを熱処理した後で金属の顆粒でマスクを形成し、マスクで保護されていない部分にエッチング処理を施し、金属顆粒マスクを取り外して柱状ナノ構造体（ナノロッド）を形成し、続いて、柱状ナノ構造体（ナノロッド）が形成された発光ダイオード（ＬＥＤ）を光電気化学（PHOTOELECTROCHEMICAL ,PEC)反応を利用、それに一定の電流を流し、さらに水銀灯の光を照射し、P型半導体材料を除き、材料の表面積に酸化層１０６を形成し、最後に再度金属層１０７をめっきし、P型半導体材料を導通して、柱状ナノ構造体（ナノロッド）を有する発光ダイオード（ＬＥＤ）を形成する。【選択図】図１Ｆ
PHOSPHORS AND LIGHTING APPARATUS USING THE SAME
(2008-12-18)
CHEN, Teng-Ming
;
Chou, Yi-Chun
A phosphor has a chemical formula of: A(B1-mEum2+)PO4, wherein A is at least one of the group consisting of Li, Na and K, and B is at least one of the group consisting of Ca, Sr and Ba, and 0.0001≦m≦0.8.
Combined immunogene therapy of IL-6 and IL-15 enhances anti-tumor activity through augmented NK cytotoxicity
(2008-12-18)
Lin, Ching-Yi
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Chuang, Tien-Fu
;
Liao, Kuang-Wen
;
Huang, Yi-Jun
;
Pai, Chien-Chun
Many tumors evade host immunity by lowering expression of major histocompatibility complex (MHC) molecules. Theoretically, low MHC expression should activate natural killer (NK) cells and in some cases suppress tumor growth; nevertheless, some tumors also produce high concentrations of immunosuppressive cytokines, such as transforming growth factor (TGF)-beta, to inhibit the activity of NK cells. Using a canine transmissible venereal tumor (CTVT) model, we have previously demonstrated that IL-6 is a strong antagonist for TGF-beta. Herein, we found that IL-6 alone was unable to significantly promote TGF-beta-inhibited NK activities. Conversely, IL-15 alone strongly promoted NK activities; however, NK activities were inhibited to baseline levels following the addition of TGF-beta. Therefore, a new strategy using combined immunogene therapy of both IL-6 and IL-15 mediated by electroporation was used in this study. This combined IL-6 and IL-15 treatment effectively relieved the inhibitory effect of TGF-beta and activated NK cell cytotoxicity of lymphokine-activated killer (LAK) cells. Similarly, in isolated DX5(+) NK cells, only IL-6 and IL-15 in combination significantly overcame the inhibitory effect of TGF-beta and promoted NK cytotoxicity. The group of BALB/c mice injected with plasmids with IL-6 and IL-15 genes (pIL-6/pIL-15) had the highest percentages of DX5(+) NK cells as compared with either the pIL-6 or pIL-15 groups. Further, in SCID mice inoculated with CTVT, electroporation-mediated delivery of pIL-6/pIL-15 was significantly more efficient in suppressing both tumor establishment and tumor growth as compared with pIL-6 or pIL-15 inoculation alone. In addition, the anti-asialo GM-1 antibody abolished NK activities in SCID mice and resulted in outgrowth of the tumors. Together, these results suggest that the TGF-beta-associated inhibition of NK cytotoxicity cannot be adequately restored by simply antagonizing TGF-beta with IL-6: the co-existence of NK activating factors such as IL-15 is also important in restoring TGF-beta-inhibited cytotoxicity. This study highlights the therapeutic potential of the pIL-6/pIL-15 combination by inhibiting TGF-beta activity and enhancing NK cytotoxicity. (c) 2008 Elsevier Ireland Ltd. All rights reserved.
THEORETICAL STUDIES OF ANHARMONIC EFFECT IN THE RICE RAMSPERGER KASSEL MARCUS THEORY
(2008-12-20)
Yao, L.
;
Liu, Y. L.
;
Lin, S. H.
;
應用化學系
;
Department of Applied Chemistry
The purpose of this paper is to propose a theoretical approach, which can evaluate anharmonic effects on the rate constants within the transition state theory. In treating unimolecular reactions under collision-free conditions by using the RRKM theory, we make use of the inverse Laplace transformation of the partition functions to obtain both the total number of states for the activated complex and density of states for the reactant with the Morse oscillator potential. To demonstrate the applications of our theoretical approach, we choose some model systems and a real reaction as examples.
客院大搬風
(2008-12-21)
王成宇
;
Department of Communication and Technology
;
傳播與科技學系
交大客院搬家啦
總編輯的話
(2008-12-21)
黃湘茹
;
Department of Communication and Technology
;
傳播與科技學系
.....
散場電影也散了傳統戲院
(2008-12-21)
陳怡秀
;
Department of Communication and Technology
;
傳播與科技學系
電影院