Browsing by Issue Date, starting with "2005-11-22"

Now showing 1 - 20 of 65665

Thickness and optical constants measurement of thin film growth with circular heterodyne interferometry
(2005-11-22)
Hsu, CC
;
Lee, JY
;
Su, DC
;
光電工程學系
;
Department of Photonics
in this article, we report an alternative method for in situ monitoring of the thickness and refractive index of thin film during the growth process. We design a special structure with a thickness-controlled air film to simulate the process of thin film growth. The phase term of the reflected light coming from this multi-layer structure is modulated and has a strong correlation with the thickness and optical constant of the thin air film within this structure. Based on the phase demodulated technique and the multiple beam reflection theory under the specific oblique incident angle, the thickness and refractive index of thin film can be measured with a single configuration. According to the theoretical prediction, the resolution of the thickness determination of the thin film should be better than 0.05 nm. (c) 2005 Elsevier B.V. All rights reserved.
Pentacene-based thin film transistors used to drive a twist-nematic liquid crystal display
(2005-11-22)
Wang, YW
;
Cheng, HL
;
Wang, YK
;
Hu, TH
;
Ho, JC
The study addresses the factors of influence on the active matrix display that is driven by pentacene-based organic thin-film transistors (TFTs). The atmosphere and humidity conditions were found to seriously affect the performance of organic TFTs. An appropriate encapsulation layer was added to protect the organic TFTs from external damage. Organic TFTs reliability, the illumination effect and device uniformity, were also considered in the context of display application. Finally, a monochrome 3 inch 64 x 128 active-matrix twist-nematic liquid crystal display (LCD) was fabricated. The display is capable of showing video images with a refresh rate of 20 Hz. Obtained results reveal the potential of organic TFTs for active-matrix LCD technology. (c) 2005 Elsevier B.V All rights reserved.
New infrared nonlinear optical crystal CsGeBr3: synthesis, structure and powder second-harmonic generation properties
(2005-11-23)
Tang, LC
;
Huang, JY
;
Chang, CS
;
Lee, MH
;
Liu, LQ
An innovative infrared nonlinear optical crystal CsGeBr3 was synthesized. Ab initio calculations on CsGeBr3 were also carried out in order to analyse the second-order nonlinear susceptibilities. From its powder x-ray diffraction pattern, this crystal was characterized as a rhombohedral structure with an (R3m, No 160) space group symmetry. The reflection powder second-harmonic generation (PSHG) measurement of CGBr showed that its nonlinear optical efficiency is 1.62 times larger than that of rhombohedral CsGeCl3 and is 9.63 times larger than that of KH2PO4 (KDP), and most important of all that CsGeBr3 is phase-matchable. The rescaled d(eff)((2)) of CGBr was about 2.45 times larger than that of rhombohedral CsGeCl3, and this trend was coincident with the ab initio calculation results. The infrared transparent spectrum of rhombohedral CsGeBr3 was extended to more than 22.5 mu m. The rhombohedral CsGeBr3 shows the potential in the realm of nonlinear optics and can be applied to the infrared region.
Suppressing phosphorus diffusion in germanium by carbon incorporation
(2005-11-24)
Luo, G
;
Cheng, CC
;
Huang, CY
;
Hsu, SL
;
Chien, CH
A problem in the Ge MOSFET process is that the phosphor-us for n-type doping in Ge diffuses very fast. It is very difficult to form the shallow source/drain p-n junctions. It is reported, for the first time, that the phosphorus diffusion in Ge during activation (or annealing) can be suppressed effectively owing to carbon incorporation.
Automatic adaptation of mobile applications to different user devices using modular mobile agents
(2005-11-25)
Kao, TH
;
Yuan, SM
;
資訊工程學系
;
Department of Computer Science
Wearable, handheld, and embedded or standalone intelligent devices are becoming quite common and can support a diverse range of applications. In order to simplify development of applications which can adapt to a variety of mobile devices, we propose an adaptation framework which includes three techniques: follow-me, context-aware adaptation, and remote control scheme. For the first, we construct a personal agent capable of carrying its owner's applications. Second, we design a personal agent capable of carrying applications with an adaptable hierarchical structure. Then, applications can be adapted approximately to the context of devices by using an attribute-based component decision algorithm. Finally, to achieve a remote control scheme, we distribute the computational load of applications on the resource-restricted mobile devices. An application is divided into two parts that can be executed on a user device and a server separately. In short, this framework facilitates the development of widespread applications for ubiquitous computing environments. Furthermore, it enables the applications to follow their owners and automatically adapt to different devices. Copyright (c) 2005 John Wiley & Sons, Ltd.
黑
(2005-11-27)
管管
Structure of thin film transistor
(2005-11-29)
Chang
;
Kow Ming
;
Chung
;
Yuan Hung
A method of manufacturing a thin film transistor for solving the drawbacks of the prior art is disclosed. The method includes steps of providing an insulating substrate, sequentially forming a source/drain layer, a primary gate insulating layer, and a first conducting layer on the insulating substrate, etching the first conducting layer to form a primary gate; sequentially forming a secondary gate insulating layer and a second conducting layer on the primary gate; and etching the second conducting layer to form a first secondary gate and a second secondary gate.
Stable organic blue-light-emitting devices prepared from poly[spiro(fluorene-9,9'-xanthene)]
(2005-11-29)
Tseng, YH
;
Shih, PI
;
Chien, CH
;
Dixit, AK
;
Shu, CF
A short, efficient synthetic route has been developed for the preparation of 2,7-dibromospiro-[fluorene-9,9'-(2',7'-di-n-octyloxyxanthene)], which was subsequently polymerized with the corresponding diborolane through Suzuki coupling to afford a fluorene-based homopolymer, PSFX, that contains a spiroxanthene group functionalized on the C-9 position of each fluorene repeat unit. Single-crystal X-ray diffraction analysis of the dibromo monomer revealed that the spiro-fused fluorene and xanthene moieties lie perpendicular to one another. As a consequence of the incorporation of the spiro pendant group, PSFX possesses a high glass transition temperature and good thermal stability while displaying its stable blue emission in the solid state. A light-emitting diode device prepared using PSFX as the emitting layer exhibits an efficient, stable blue emission; it has a turn-on voltage of 6 V and a maximum external quantum efficiency of 1.74% ph/el. Even when the brightness was increased up to 10(3) cd/m(2) (ca. 11 V), the CIE color coordinates of the resulting EL spectrum remained in the deep-blue region (0.15, 0.07) and the device's efficiency was 1.33% ph/el.
An isolated Candida albicans TL3 capable of degrading phenol at large concentration
(2005-12-01)
Tsai, SC
;
Tsai, LD
;
Li, YK
;
應用化學系
;
應用化學系分子科學碩博班
An isolated yeast strain was grown aerobically on phenol as a sole carbon source up to 24 mm; the rate of degradation of phenol at 30 degrees C was greater than other microorganisms at the comparable phenol concentrations. This microorganism was further identified and is designated Candida albicans TL3. The catabolic activity of C. albicans TL3 for degradation of phenol was evaluated with the K-s and V-max values of 1.7 +/- 0.1 mm and 0.66 +/- 0.02 mu mol/min/mg of protein, respectively. With application of enzymatic, chromatographic and mass-spectrometric analyses, we confirmed that catechol and cis,cis-muconic acid were produced during the biodegradation of phenol performed by C. albicans TL3, indicating the occurrence of an ortho-fission pathway. The maximum activity of phenol hydroxylase and catechol-1,2-dioxygenase were induced when this strain grew in phenol culture media at 22 mm and 10 mm, respectively. In addition to phenol, C. albicans TL3 was effective in degrading formaldehyde, which is another major pollutant in waste water from a factory producing phenolic resin. The promising result from the bio-treatment of such factory effluent makes Candida albicans TL3 be a potentially useful strain for industrial application.
Airline flight frequency determination in response to competitive interactions using fuzzy logic
(2005-12-01)
Hsu, CI
;
Wen, YH
;
運輸與物流管理系註：原交通所+運管所
;
Department of Transportation and Logistics Management
This study determines the flight frequencies on an airline network in response to anticipated airline competitive interactions using fuzzy logic. It is expressed as an optimization problem to be solved in the medium-term airline network-planning phase, and it deals with tactical decisions made one season or one year in advance. The proposed model includes three submodels-an airline market share model, a flight-frequency programming model, and a fuzzy-logic-based competitive interaction model. Flight frequencies on an airline network with competitive interactions are analyzed by combining these three submodels. A case study, demonstrating the feasibility of applying the proposed model, confirms that the competitive interactions will converge. The results of this study confirm the accuracy of the proposed model and their flexibility of the decision-making involved in determining flight frequencies on an airline network in competitive and uncertain environments. (c) 2005 Elsevier Ltd. All rights reserved.
Under the shadow of Asian Brown Clouds: Unbalanced regional productivities in China and environmental concerns
(2005-12-01)
Hu, JL
;
Sheu, HJ
;
Lo, SF
;
管理科學系
;
經營管理研究所
China has seen rapid economic growth over the past two decades, but severe environmental problems have accompanied this, such as the looming danger of Asian Brown Clouds. This paper analyzes the regional development of China by examining economic performance and environmental factors. Technical efficiency and productivity changes in 31 regions of China are computed for the period 1997-2001. In the case of regional GDP, the fast-developing eastern (coastal) regions experience higher technical efficiency and productivity growth than the inland central and western regions. When environmental factors are incorporated, the eastern regions still perform better than inland regions, both from static and dynamic analysis. This phenomenon is termed the 'double deterioration' of the inland areas in China. Double deterioration is attributed to the lack of economic resources to replace highly-polluting production equipment and technology in those less developed regions.
~寄情漫ㄏㄨㄚˋ醫想世界~
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
以漫畫或卡通圖形式表達個人專業（學習）領域，能反應心情並可作品使觀賞者會心一笑產生認同感為佳。.....
Reduction of particle reentrainment using porous fence in front of dust samples
(2005-12-01)
Huang, CH
;
Lee, CI
;
Tsai, CJ
;
環境工程研究所
;
Institute of Environmental Engineering
Wind tunnel experiments were conducted to measure the emission factor of particle reentrainment from a dust sample with or without a porous fence. The effect of wind velocity, fence porosity, and distance between the fence and the dust sample on the emission factor was studied. A 20% porous fence was found to be effective for reducing the particle reentrainment at a low wind velocity of 5 m/s. When the wind velocity was increase from 7 to 15 m/s, the results show that the particle reentrainment can also be reduced in a certain region behind the fence (x/H<4, x=distance between fence and sample; H=fence height) for the 20% porous fence. A linear multivariable regression model was fitted to the logarithmically transformed experimental data. The good fit of the regression model makes it possible to estimate emission rate as a function of the dimensionless distance (x/H), the wind velocity, and the elapsed time.
Oxide-trap-enhanced Coulomb energy in a metal-oxide-semiconductor system
(2005-12-01)
Lu, MP
;
Chen, MJ
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
Coulomb energy is essential to the charging of a nanometer-scale trap in the oxide of a metal-oxide-semiconductor system. Traditionally the Coulomb energy calculation was performed on the basis of an interfacelike trap. In this paper, we present experimental evidence from a 1.7-nm oxide: Substantial enhancements in Coulomb energy due to the existence of a deeper trap in the oxide. Other corroborating evidence is achieved on a multiphonon theory, which can adequately elucidate the measured capture and emission kinetics. The corresponding configuration coordinate diagrams are established. We further elaborate on the clarification of the Coulomb energy and differentiate it from that in memories containing nanocrystals or quantum dots in the oxide. Some critical issues encountered in the work are addressed as well.
諾貝爾生理醫學獎得主Phillip A. Sharp博士蒞校訪問
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
諾貝爾生理醫學獎得主Phillip A. Sharp博士，於11月15日蒞校訪問，並在行政大樓二樓接待室，與校長及徐明達副校長、許萬枝教務長、林奇宏副研發長面會。
子宮頸抹片檢查骨密度檢查
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
衛保組於11月17日，在護理館4樓 414教室舉辦子宮頸抹片與骨密度檢查，希望提供全校教職人員一個健康無憂的工作環境。
2,8-Bis(3-phenylquinoxalin-2-yl)-5 lambda(6)-dibenzo[b,d] thiophene-5,5-dione
(2005-12-01)
Huang, TH
;
Whang, WT
;
Wen, YS
;
Lin, JT
;
材料科學與工程學系
The bond lengths and angles in the title compound, C40H24N4O2S, are normal. The dihedral angles between the dibenzothiophene-S,S-dioxide and two quinoxaline groups are 34.88 (1) and 45.86 (1)degrees.
由表演工作坊飆向陽明
(國立陽明大學, 2005-12-01)
錢玨琄
;
陳婉華
時間：2005年11月18日（五）中午12:00-14:00 地點：二教樓二樓222教室主講：丁乃箏.....
生物藥學研究所專題演講
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
講題：Telomeres and telomerase: lessons from an atypical budding yeast 主講：Neal Fan-Nan Lue, M.D., Ph. D. Cornell University, Weill Medical College 時間：94年12月6日（星期二）15:30 地點：傳醫大樓乙棟一樓階梯教室
專利分析與分析工具研習課程
(國立陽明大學, 2005-12-01)
陽明電子報編輯小組
圖書館訂於11月28日中午12:10~13:20舉辦一場「專利分析與分析工具研習課程」，歡迎報名參加。...