Browsing by Issue Date, starting with "2008-03-13"

Now showing 1 - 20 of 56033

Heterogeneity-projection hard-decision interpolation method for color reproduction
(2008-03-13)
Tsai, Chi-Yi
;
Song, Kai-Tai
The present invention discloses a heterogeneity-projection hard-decision interpolation method for color reproduction, which utilizes a heterogeneity-projection method to determine the optimal edge direction and then utilizes a hard-decision rule to determine the optimal interpolation direction and obtain the information of the green color elements. The high-frequency information of the plane of the green color elements is incorporated into the processing of the planes of the red color elements and the blue color elements to reduce the restoration errors of the red and blue color elements. Therefore, the present invention can decrease the interpolation-direction errors and achieve a higher PSNR and a better visual effect.
Highly saturated red-emitting Mn (IV) activated phosphors and method of fabricating the same
(2008-03-13)
Chen, Teng-ming
;
Luo, Juih-Tzer
The present invention provides a light emitting device comprising a semiconductor light source emitting radiation at about 250˜500 nm; and a phosphor composition radiationally coupled to the semiconductor light source, wherein the phosphor composition is selected from the group consisting of Mg14(Ge(5-a)Mna)O24, Sr(Ge(4-b)Mnb)O9, Mg2(Ti(1-c)Mnc)O4, Zn2(Ti(1-d)Mnd)O4, SrMg(Al(10-e)Mne)O17, and Y3(Ga(5-f)Mnf)O12.
Barrierless reactions between two closed-shell molecules. I. Dynamics of F(2)+CH(3)SCH(3) reaction
(2008-03-14)
Lu, Yu-Ju
;
Lee, Lance
;
Pan, Jun-Wei
;
Xie, Tingxian
;
Witek, Henryk A.
A detailed experimental and theoretical investigation of the first-reported barrierless reaction between two closed-shell molecules [J. Chem. Phys. 127, 101101 (2007)] is presented. The translational energy and angular distributions of two product channels, HF+CH(2)SFCH(3) and F+CH(3)SFCH(3), determined at several collision energies, have been analyzed to reveal the dynamics of the studied reaction. Detailed analysis of the experimental and computational results supports the proposed reaction mechanism involving a short-lived F-F-S(CH(3))(2) intermediate, which can be formed without any activation energy. Other possible reaction mechanisms have been discriminated. The decay of the intermediate and competition between the two product channels have been discussed. (c) 2008 American Institute of Physics.
A new approach for quantitative determination of glucose by using CdSe/ZnS quantum dots
(2008-03-14)
Huang, Chin-Ping
;
Liu, Shu-Wei
;
Chen, Teng-Ming
;
Li, Yaw-Kuen
;
應用化學系
Quantitative detection of glucose is an important issue in food industry, various biotechnological processes and medication of metabolic disorders. Many ways have been developed to approach this target. In this study, we demonstrated a simple assay system containing glucose oxidase (GOD) and CdSe/ZnS quantum dots (QDs) for specific and quantitative detection of glucose, The role of QDs functioned as an "indicator" to reveal the acidity change of the assay system resulting from the enzymatic oxidation of glucose. By controlling the initial buffer conditions of the assay system at 10 mM or 30 mM phosphate, pH 8.0, the quench ratio of PL intensity of QDs at 586 nm was found to be linear to the tested glucose in the range of 0.2-10 mM or 2-30 mM, respectively. The assay system also provides a convenient way to determine the glucose concentration by visuahzing the color change of QDs fluorescence. As compare to most of the existing methods, this newly developed system possesses many advantages, including simplicity, low cost, high flexibility, and good sensitivity. Furthermore, no complicated chemical modification and enzyme immobilization were needed in this system. (C) 2007 Elsevier B.V. All rights reserved.
Effect of annealing temperature for Si0.8Ge0.2 epitaxial thin films
(2008-03-15)
Chang, Yuan-Ming
;
Dai, Ching-Liang
;
Cheng, Tsung-Chieh
;
Hsu, Che-Wei
;
機械工程學系
This study investigates the effect of annealing temperature on the Si0.8Ge0.2 epitaxial layers. The Si0.8Ge0.2 epitaxial layers were deposited by using ultrahigh vacuum chemical vapor deposition (UHVCVD) with different annealing temperatures ((400-1000 degrees C). Various measurement technologies, including high-resolution X-ray diffraction ((HRXRD), atomic force microscopy ((AFM) and interfacial adhesion tester, were used to characterize the materials properties of the SiGe epilayers. The experimental results showed that the SiGe epilayers gradually reduced lattice-mismatch to the underlying substrate as annealing temperature increased (from 400 to 800 degrees C), which resulted from a high temperature enhancing interdiffusion between the epilayers and the underlying substrate. In addition, the average grain size of the SiGe films increased from 53.3 to 58 nm with increasing annealing temperature. The surface roughness in thin film annealed at 800 degrees C was 0.46 nm. Moreover, the interfacial adhesion strength increased from 476 +/- 9 to 578 +/- 12 kg/cm(2) with increasing the annealing temperature. (c) 2007 Elsevier B.V. All rights reserved.
Improving dielectric loss and enhancing figure of merit of Ba0.5Sr0.5Ti0.95Mg0.05O3 thin films doped by aluminum
(2008-03-15)
Lee, Shean-Yih
;
Chiou, Bi-Shiou
;
Lu, Horng-Hwa
;
電子工程學系及電子研究所
;
Innovative Packaging Research Center
The different Al contents effects of Ba0.5Sr0.5Ti0.95Mg0.05O3 (BSTM) thin films grown on Pt/TiN/SiO2/Si substrates in the crystallographic structure, surface morphology, dielectric constant, loss tangent, leakage current, and figure of merit were investigated. The BSTM films properties are studied as a function of Al content and have remarkable improvements including dielectric loss, leakage current, and figure of merit (FOM) as well as films grain sizes. With increasing Al content, the dielectric constant (k), tunability (T), loss tangent (tan delta), and leakage current density (J(L)) decrease while the FOM, defined as T/tan delta, and breakdown strength increases. The maximum dielectric constant at zero bias, tunability, dielectric loss, FOM, and leakage current density of 1 mol% Al-doped BSTM films at 280 kV cm(-1) are 248, 40%, 0.0093, 43, and 3.76 x 10(-7) A cm(-2), however, the same measured conditions of undoped BSTM films are 341, 54%, 0.0265, 20, and 1.19 x 10(-6) A cm(-2), respectively. The dc resistivity increases from 2.33 x 10(11) Omega cm of the BSTM film to 6.08 x 10(12) Omega cm of the 5 mol% Al-doped BSTM film at 280 kV cm(-1). In addition, the tolerance factor (t) of Al-doped BSTM perovskite thin films is 0.97 as compared to 0.87 of the undoped BSTM thin films. The increasing of tolerance factor value indicates that the specimens with Al-doped BSTM films are more stable than undoped specimens. (C) 2007 Elsevier B. V. All rights reserved.
Growth and structural characterization of ZnO on Y2O3/YSZ by pulsed laser deposition
(2008-03-15)
Lin, Chih-Wei
;
Ho, Yen-Teng
;
Chang, Li
;
材料科學與工程學系
;
Department of Materials Science and Engineering
Pulsed laser deposition was used to form epitaxial Y2O3 buffer layers on yttria-stabilized zirconia (YSZ) (111) substrates, followed by formation of epitaxial ZnO. Structural characterization by X-ray diffraction, atomic force microscopy, and transmission electron microscopy (TEM) shows that Y2O(3) has high-quality crystalline characteristics with a smooth (111) surface, providing a good buffer for deposition of ZnO films on YSZ. For ZnO deposition, a two-step growth process had been adopted, which consisted of low-temperature nucleation and high-temperature growth. ZnO films on Y2O3/YSZ have good structural qualities in c-axis orientation with smooth surfaces. Electron diffraction patterns show an orientation relationship of [2 (1) over bar(1) over bar0](ZnO)//[0 (1) over bar1](Y2O3) and (0002)(ZnO)//(222)(Y2O3). High-resolution TEM clearly reveals that both the interfaces of ZnO/Y2O3 and Y2O3/YSZ are flat without the formation of any interlayers. (C) 2007 Elsevier B.V. All rights reserved.
Self-protecting dual-ring-architecture in time-sharing passive optical network to prevent the occurrence of fiber failure
(2008-03-15)
Yeh, C. H.
;
Lee, C. S.
;
Chi, S.
;
光電工程學系
;
Department of Photonics
We propose and experimentally investigate a self-protecting dual-ring-architecture time-division-multiplexed passive optical network (TDM-PON) using bidirectional dual-fiber path against the fiber-fault. By the proposed access network, the ring-based TDM-PON system can be revived promptly under single fiber failure. This restorable time is achieved within a few ms in the proposed ring access network. Moreover, the performance of data traffic in the optical access network has also discussed. (C) 2007 Elsevier B.V. All rights reserved.
Synthesis and characterization of a novel proton-exchange membrane for fuel cells operating at high temperatures and low Humidities
(2008-03-15)
Chaung, Ching-Nan
;
Chao, Liang
;
Huang, Ying-Jie
;
Hsieh, Tar-Hwa
;
Chuang, Hung-Yi
The synthesis of a p-toluidine/formal dehyde (PTF) resin was performed, and the effects of the molar ratio of the individual monomers and the polymerization conditions on the structure of the PTF resin were studied. Fourier transform infrared and C-13-NMR spectra were used to characterize the PTF. Wide-angle X-ray diffraction patterns revealed the crystalline structures of various PTFs. Polarized optical microscopy revealed that the molar ratio of the monomers had a strong effect on the crystalline morphologies. A longer polymerization time turned out a polymer with a higher intrinsic viscosity and molecular weight, which led to differences in the proton conductivity. All of the PTFs showed a higher proton conductivity than a commercial Nafion membrane at 90-100 degrees C and 0% relative humidity. The proton conductivity of the PTF series could be improved by sulfonation with sulfuric acid and could be maintained after blending with polyurethane. Pure methanol could be used as a fuel source because of the insolubility and nonwetting properties of PTF in methanol to increase the output current density for a PTF membrane electrode assembly. (C) 2007 Wiley Periodicals, Inc.
Sphere-separable partitions of multi-parameter elements
(2008-03-15)
Golanya, Boaz
;
Hwang, Frank K.
;
Rothbluma, Uriel G.
;
應用數學系
;
Department of Applied Mathematics
We show the optimality of sphere-separable partitions for problems where n vectors in d-dimensional space are to be partitioned into p categories to minimize a cost function which is dependent in the sum of the vectors in each category; the sum of the squares of their Euclidean norms; and the number of elements in each category. We further show that the number of these partitions is polynomial in n. These results broaden the class of partition problems for which an optimal solution is guaranteed within a prescribed set whose size is polynormially bounded in n. Applications of the results are demonstrated through examples. (C) 2007 Elsevier B.V. All rights reserved.
肺結核─可怕不可怕
(2008-03-16)
沈昭邦
;
Department of Communication and Technology
;
傳播與科技學系
可是我怕
《事發的19分鐘》
(2008-03-16)
薛怡凡
;
Department of Communication and Technology
;
傳播與科技學系
茱迪‧皮考特用文字精湛地揭露出美國現代社會所隱藏的嚴重青少年問題。當青少年在得不到家庭的溫暖，又沒有同儕的認同與長輩的指引下，個人與社會的不幸就此醞釀、發酵。
哈囉你今天公仔了嗎?
(2008-03-16)
姜建亨
;
Department of Communication and Technology
;
傳播與科技學系
便利商店不停推陳出新搶客源對7-11來說從一開始的HELLO KITTY 到前陣子的小叮噹無不造成一股熱潮這樣的消費現象到底是好的還是壞的??
《姊姊的守護者》身體不是我的
(2008-03-16)
陳惠玟
;
Department of Communication and Technology
;
傳播與科技學系
書評姊姊的守護者
《飛天小女警Z》超「萌」新造型
(2008-03-16)
鍾瑄
;
Department of Communication and Technology
;
傳播與科技學系
首次亮相的日本版飛天小女警引起觀眾好奇，也引發了兩極反應，原本只有二頭身的小女警們全變成身穿迷你裙的長腿美少女，讓喜愛日本動漫的觀眾直呼「好萌！」，日本版動畫更一改原著設定加入了日本少女動畫永遠不能少的「變身」元素。《新登場！飛天小女警Z》除了沿用原著的角色設定外，似乎和美國卡通頻道原創的《飛天小女警》毫無干係。
《丹麥文化創意潛力》文化與商業的合舞
(2008-03-16)
楊宇軒
;
Department of Communication and Technology
;
傳播與科技學系
隨著人力成本不斷提高，台灣產業企圖由代工轉向研發設計導向，然而這些需要強大的文化基礎，讓我們來看看丹麥文化產業能給我們哪些啟發。
學生住宿機率決定一切?
(2008-03-16)
汪承漢
;
Department of Communication and Technology
;
傳播與科技學系
住宿權住宿舍住校外面面觀
《機長，我有問題》
(2008-03-16)
姚翔
;
Department of Communication and Technology
;
傳播與科技學系
曾擔任機長的史密斯所寫
《原來，我的時代現在才開始》
(2008-03-16)
謝甄芳
;
Department of Communication and Technology
;
傳播與科技學系
蕭青陽
家教風行大學生賺錢新趨勢
(2008-03-16)
黃夙蓮
;
Department of Communication and Technology
;
傳播與科技學系
賺很多錢