Browsing by Issue Date, starting with "2005-11-10"

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The dynamic relationship between the prices of ADRs and their underlying stocks: evidence from the threshold vector error correction model
(2005-11-10)
Chung, HM
;
Ho, TW
;
Wei, LJ
;
管理科學系
;
資訊管理與財務金融系註：原資管所+財金所
This paper sets out to estimate the dynamic relationship that exists between the prices of ADRs and their underlying stocks, in both the short run and the long run, using a number of recent developments of the threshold cointegration framework. The empirical results support the notion of nonlinear mean reversion of the prices of ADRs and their underlying stocks.
Self-healing fiber Bragg grating sensor system
(2005-11-10)
Chi, Sien
;
Peng, Peng-Chun
;
Lin, Wen-Piao
The present invention is a self-healing fiber Bragg grating sensor system which comprises a central office, at least one network node, at least one 2×2 optical switch and at least one fiber Bragg grating. The network node can be made of optical switch. When the fiber for the sensor system is broken, sensing signals are discriminated in different paths provided by the network nodes to avoid stop working once the fiber is broken, by which the self-healing ability of the system is greatly improved. Besides, by using the structure of fiber laser in the present invention, the power output and the signal-to-noise ratio can be greatly increased. Accordingly, the present invention is to design a fiber sensor system with low cost and high capacity and with capability of self-healing.
組合多準位記憶單元並使其具備錯誤更正機制的方法
(2005-11-11)
吳介琮
;
汪大暉
;
張錫嘉
本發明係為一種組合多準位記憶單元並使其具備錯誤更正機制的方法，其係組合多個記憶體單元達到記憶儲存的目的，其記憶體單元之分階電壓準位不受2次方值的限制，可線性逐漸提升。其特色在不需增加記憶體面積，亦可增加記憶體容量；並且餘出無法完整表現0、1組合的電壓準位，可作為伴隨資料讀取的錯誤抹除(erasure)訊息。對於記憶體之使用效率而言，其增加之記憶容量不僅可以儲存資料，更可以用來儲存錯誤更正機制，以確保所儲存資料之正確性並且提升記憶體之生產良率。
高度陣列式排列具摻雜元素之P型氧化鋅奈米結構製造方法
(2005-11-11)
陳三元
;
林晉慶
;
陳虹蓓
本發明一種高度陣列式排列具摻雜元素之P型氧化鋅奈米結構製造方法，其係在鍍有氧化鋅薄膜的矽基板上，經由化學溶液法在低溫(55-95℃)環境下成長陣列式排列之氧化鋅奈米結構，接著再經過氨氣(NH3)電漿處理使氮離子藉著表面吸附或缺陷路徑來擴散而形成氮摻雜P型氧化鋅奈米結構。因此，本發明可製造規則排列的氮摻雜氧化鋅奈米線，並且可應用在p-n接面和半導體異質結構的光電元件上，具有高可靠、低熱處理成本、快速熱處理、元件產出效率高等功效。
p型氧化鋅薄膜之製作方法
(2005-11-11)
陳三元
;
林晉慶
本發明係為一p型氧化鋅薄膜之製作方法，其為在鍍有氮化矽薄膜的矽基板上，經由磁控射頻濺鍍法，在低溫(50℃)成長氧化鋅薄膜，再經過氮離子佈值處理及熱退火處理，改善其結晶性，並提升本質性紫外光區訊號，降低可見光放射強度，使其具有高電洞濃度、高電洞載子遷移率、高穩定性及光電特性佳等特性，可應用於p-n接面和半導體異質結構的光電元件上。
Low-dielectric, nanoporous polyimide films prepared from PEO-POSS nanoparticles
(2005-11-14)
Lee, YJ
;
Huang, JM
;
Kuo, SW
;
Chang, FC
;
應用化學系
Dielectric insulator materials that have low dielectric constants (k < 2.5) are required as inter-level dielectrics to replace silicon dioxide (SiO2) in future semiconductor devices. In this paper, we describe a novel method for preparing nanoporous polyimide films through the use of a hybrid PEO-POSS template. We generated these nanoporous foams are generated by blending polyimide as the major phase with a minor phase consisting of the thermally labile PEO-POSS nanoparticles. The labile PEO-POSS nanoparticles would undergoes oxidative thermolysis to releases small molecules as byproducts that diffuse out of the matrix to leave voids into the polymer matrix. We achieved significant reductions in dielectric constant (from k = 3.25 to 2.25) for the porous PI hybrid films, which had pore sizes in the range of 1040 nm. (c) 2005 Elsevier Ltd. All rights reserved.
Miscibility enhancement on the immiscible binary blend of poly(vinyl phenol) and poly(acetoxy styrene) with poly(ethylene oxide)
(2005-11-14)
Kuo, SW
;
Liu, WP
;
Chang, FC
;
應用化學系
;
Department of Applied Chemistry
The miscibility and hydrogen-bonding behaviors of ternary polymer blends of poly(ethylene oxide) (PEO)/ poly(vinyl phenol) (PVPh)/poly(acetoxystyrene) (PAS) were investigated by using DSC and Fourier transform infrared spectroscopy (FTIR). The PEO is miscible with both PVPh and PAS based on the observed single T-g over the entire composition range. FTIR was used to Study the hydrogen-bonding interactions between PEO with PAS and PVPh, respectively. Quantitative analyses show that the strength of hydrogen-bonding strength is of the order of the hydroxyl-ether inter-association of PVPh/PEO blend > the hydroxyl-hydroxyl self-association of pure PVPh > the hydroxyl-carbonyl inter-association PVPh/PAS blend at room temperature. Furthermore, the addition of PEO is able to enhance the I miscibility of immiscible PVPh/PAS binary blends at lower (20 wt.-%) or higher (60 and 80 wt.-%) PEO content. However, there exists a closed iminiscibility loop in the phase diagram at 40 wt.-% PEO content due to the "Delta chi" and "Delta K" effects in this hydrogen-bonded ternary polymer system. Therefore, an interesting and unusual sandwich phase diagram has been observed in this ternary polymer blend.
Synthesis and characterization of alternating fluorene-based copolymers containing diaryl- and non-substituted bithiophene units
(2005-11-14)
Lin, HC
;
Sung, HH
;
Tsai, CM
;
Li, KC
;
材料科學與工程學系
A series of soluble alternating fluorene-based copolymers containing diaryl- and non-substituted bithiophene units are synthesized by palladium-catalyzed Suzuki coupling reaction. All polymers demonstrate green colors of photoluminescence (PL) in chloroform, good thermal stability (with, decomposition temperatures above 436 degrees C), and high glass transition temperatures (in the range of 120-144 degrees C). Owing to the large steric hindrance of diaryl substituents on bithiophenes in the polymers (P2-P4), the aggregation of solids is reduced as well as the solubility is improved, so the performance of their PLED devices are superior to that of the non-substituted polymer (PI). Compared with P1, the introduction of substitutents at 3,3'-position of bithiophene in P2-P4 has significant effects on the photophysical properties of resulting polymers in solution and solid states. Though the PL quantum yield of P1 is much higher than those of diaryl-substituted polymers (P2-P4), the PLED device of P1 has the worst electroluminescence (EL) properties due to the poor solubility of P1. Consequently, among these polymers, the device made of P3 as an emitter has the highest luminance of 2590 cd/m(2) at 9.5 V. For optimum device performance, a device of P3 blended with PVK can be further enhanced to a brighter luminance of 4284 cd/m(2) at 18 V. (c) 2005 Elsevier Ltd. All rights reserved.
Reduced temperature-quenching of photoluminescence from indium nitride nanotips grown by metalorganic chemical vapor deposition
(2005-11-14)
Shi, SC
;
Chen, CF
;
Hsu, GM
;
Hwang, JS
;
Chattopadhyay, S
We report metalorganic chemical vapor deposition of indium nitride (InN) nanotips with apex angles of 10 degrees and length and base diameter of around 1 mu m and 200 nm, respectively. The structure of the hexagonal InN nanotips growing along [002] was studied by electron microscopy and x-ray diffraction, and the optical properties were studied using temperature-dependent photoluminescence (PL) measurements. A narrow emission peak with a 18 meV full width at half maximum positioned at 0.77 eV was obtained with no visible emission. A PL quenching of only 14% was observed with a temperature scan of 15-320 K. (C) 2005 American Institute of Physics.
Compact efficient passively Q-switched Nd : GdVO4/PPLN/Cr4+: YAG tunable intracavity optical parametric oscillator
(2005-11-14)
Tsai, LY
;
Chen, YF
;
Lin, ST
;
Lin, YY
;
Huang, YC
We report on a compact efficient diode pumped passively Q-switched Nd:GdVO4/ Cr4+:YAG/ PPLN intracavity optical parametric oscillator (OPO) with a shared-resonator configuration. Experimental results reveal that the amplitude stability of the shared-resonator configuration is substantially superior to that of the conventional coupled-resonator configuration. At a diode pump power of 15 W, the compact intracavity OPO cavity produces the average power greater than 900 mW with a pulse repetition rate of 36 kHz. The output pulses noticeably display the mode-locking phenomenon that leads to the maximum peak power to be higher than 20 kW. (c) 2005 Optical Society of America.
Photonic band structure for a superconductor-dielectric superlattice
(2005-11-15)
Wu, CJ
;
Chen, MS
;
Yang, TJ
;
電子物理學系
;
Department of Electrophysics
The photonic band structure in the transversal electric mode for a one-dimensional superconductor-dielectric superlattice is theoretically calculated. By using the Abeles theory for a stratified medium, we first calculate the transmittance spectrum from which all the possible bands can be directly seen. Then we calculate the real photonic band structure based oil the transcendental equation derived from the transfer matrix method and Bloch theorem. The band structure is shown to be strongly consistent with the transmittance spectrum. We finally study the three lowest band gaps as a function of penetration of superconductor, permittivity of dielectric, and angle of incidence, respectively. The optical properties in a superconductor-dielectric superlattice thus are well disclosed. (c) 2005 Elsevier B.V. All rights reserved.
Prediction of disulfide connectivity from protein sequences
(2005-11-15)
Chen, YC
;
Hwang, JK
;
生物科技學系
;
生物資訊及系統生物研究所
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Department of Biological Science and Technology
The difficulties in predicting disulfide connectivity from protein sequences lie in the nonlocal properties of the disulfide bridges that involve cysteine pairs at large sequence separation. Though some progress has been recently made in the prediction of disulfide connectivity, the current methods predict less than half of the disulfide patterns for the data set sharing less than 30% sequence identity. In this report, we use the support vector machines based on sequence features such as the coupling between the local sequence environments of cysteine pair, the cysteines sequence separations, and the global sequence descriptor, such as amino acid content. Our approach is able to predict 55% of the disulfide patterns of proteins with two to five disulfide bridges, which is 11-26% higher than other methods in the literature. Proteins 2005;61:507-512. (c) 2005 Wiley-Liss, Inc.
No-loss bent light pipe with an equiangular spiral
(2005-11-15)
Chu, SC
;
Chern, JL
;
光電工程學系
;
Department of Photonics
Bending a light pipe and maintaining the required volume and size, while at the same time preserving source energy and minimizing bend losses, is the basic criterion for designing a light pipe. An important requirement is the design of a light pipe that is capable of being bent without loss of light and with no limitations on acceptance angle. It is shown that in theory such a light pipe does exist, in a form corresponding to the so-called golden rectangle. Numerical simulations with six different no-loss light pipes with multiple bends are provided as a demonstration. (c) 2005 Optical Society of America
Effect of annealing atmosphere on physical characteristics and photoluminescence properties of nitrogen-implanted ZnO thin films
(2005-11-15)
Yang, CC
;
Lin, CC
;
Peng, CH
;
Chen, SY
;
材料科學與工程學系
ZnO films were pre-treated with nitrogen implantation in the range from 5 x 10(12) to 5 x 10(15) cm(-2). Effect of nitrogen concentration on structural crystallinity and photoluminescence properties of nitrogen-implanted ZnO films under different atmospheres and annealing treatments was investigated. It was found that there exists a solubility issue of nitrogen in ZnO films at 850 degrees C via secondary ion mass spectrometry (SIMS). It was found that the peak intensity of near band-edge (NBE) emission remarkably decreases with the increase of concentration of implanted nitrogen if annealed in nitrogen atmosphere due to the increased oxygen vacancies. However, when the ZnO was implanted with 5 x 10(12) cm(-2) and annealed in oxygen atmosphere, the optical properties are improved probably because the effective incorporation of O atom diminishes those donor levels (oxygen vacancies) and the crystallinity is also improved due to implanted nitrogen. However, excess nitrogen would reduce the crystallinity and promote the formation of the deep-level emission due to high amount of intrinsic and structure defects. (c) 2005 Elsevier B.V. All rights reserved.
Comment on traceability on RSA-based partially signature with low computation
(2005-11-15)
Wu, LC
;
Yeh, YS
;
資訊工程學系
;
Department of Computer Science
Recently, Chien et al. proposed RSA-based partially blind signature with low computation for mobile and smart-card applications. Hwang et al. claimed that Chien et al.'s scheme cannot meet the untraceability property of the blind signature later. In this paper, we show that Hwang et al.'s claim is incorrect and Chien et al.'s scheme is still satisfy the untraceability property. (c) 2005 Elsevier Inc. All rights reserved.
Photon-number fluctuation and correlation of bound soliton pairs in mode-locked fiber lasers
(2005-11-15)
Lee, RK
;
Lai, YC
;
Malomed, BA
;
光電工程學系
;
Department of Photonics
Quantum photon-number fluctuation and correlation of bound soliton pairs in mode-locked fiber lasers are studied on the basis of the complex Ginzburg-Landau equation model. We find that, depending on their phase difference, the total photon-number noise of the bound soliton pair can be larger or smaller than that of a single soliton, and the two solitons in the soliton pair have a corresponding positive or negative photon-number correlation. It is predicted for the first time to our knowledge that out-of-phase soliton pairs can exhibit less noise as a result of negative correlation. (c) 2005 Optical Society of America.
醫學系九十四學年度第一學期網路教學評鑑開始
(國立陽明大學, 2005-11-17)
陽明電子報編輯小組
◎教師教學意見調查活動時間：9/30至95/1/17 活動對象：醫學系一至五年級同學問卷放置處：「校務行政系統」→「教學評鑑」→「教師教學意見調查」 ◎課程評鑑活動時間：12/5至95/1/17 活動對象：醫學系一至五年級同學問卷放置處：「校務行政系統」→「教學評鑑」→「課程評鑑」請同學於活動期間內，上網填寫問卷！ PS：教學評鑑分析結果可至醫學系網站(http://www.ym.edu.tw/md)查詢。
通識中心藝文系列講座（二）：音樂和神經科學
(國立陽明大學, 2005-11-17)
陽明電子報編輯小組
通識中心藝文系列講座第二場，於10月24日在第二教學大樓二樓，舉行「音樂和神經科學」專題演講，由慈濟大學神經科學研究所所長，同時也是陽明校友，愛杏社社員的郭博昭老師，與大家進行這次的分享
陽明學生的服務熱忱－物理治療臨床服務
(國立陽明大學, 2005-11-17)
汪子瑄
;
涂豫新
;
何姿怡
;
林明漢
隨著科技發展，人與人之間的距離也越來遙遠。近年來，常見社會批評現在的大學生態度冷漠、缺乏對社會的關懷，但是在陽明的校園內，正有一批大學一年級的學生願意付出他們的時間和精神，在醫療院所為病人服務。對大部分民眾而言，物理治療仍然是一個陌生的專業。因此，物理治療系特為大一的學生開設了「物理治療導論」及「物理治療臨床服務」兩門課程，以期大一學生儘早接觸臨床環境，了解物理治療師的專業角色。其中，「物理治療臨床服務」是一門生動的課程，系上會安排選修的學生每個星期進行兩個小時的臨床服務，服務地點包括：「振興復健醫學中心」、「台北榮民總醫院」及「創世基金會」。
國立陽明大學94學年度第3次(擴大)行政會議紀錄
(國立陽明大學, 2005-11-17)
陽明電子報編輯小組
時間：94年11月9日(星期三)上午9時整地點：本校會議中心第2會議室