Browsing by Issue Date, starting with "2011-10-11"

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Method for forming a GexSi1-x buffer layer of solar-energy battery on a silicon wafer
(2011-10-11)
Chang Edward Yi
;
Tang Shih-Hsuan
;
Lin Yue-Cin
The method is disclosed that Si+ is implanted on Si substrate to enhance strain relaxation at the interface between the metamorphic GexSi1−x buffer layers and Si substrate, in order to facilitate the growth of a high quality Ge on Si substrate. And several GexSi1−x buffer layers (Si/Ge0.8Si0.2/Ge0.9Si0.1/Ge) are grown on top of Si substrate by UHVCVD. Then grow pure Ge layer of low dislocation density on GexSi1−x buffer layer. Finally, grow up high efficiency III-V solar cell on GexSi1−x buffer layer.
用於全像儲存裝置的灰階碼之編碼與解碼方法
(2011-10-11)
孫慶成
;
陳昱達
;
楊宗勳
;
歐陽盟
本發明係一種用於全像儲存裝置的灰階碼之編碼與解碼方法，其中編碼方法主要乃利用二維感測器之灰階值對原始資料之一數量的原始位元資料進行編碼後，才傳送至空間光調節器加密，解碼方法主要是對所接收的灰階值修正成原本灰階值後，並藉由最大灰階值與原本灰階值的比較，將原本灰階值解碼成二進位資料。因此，本發明之編碼與解碼方法，可以更佳利用二維感測器的儲存位置，碼率接近1。
產生揚聲器共振式音箱參數之系統
(2011-10-11)
白明憲
;
張寰生
;
陳榮亮
一種產生揚聲器共振式音箱參數之系統，該系統係藉由定義一低頻延伸頻率、一質量比及一出音孔的半徑，並固定一機械系統的共振頻率及一機械系統質量，取得一頻率比、一導音管長度及一腔體容積等參數，以製作該揚聲器共振式音箱。
真空紫外線激發綠光螢光材料與其製造方法
(2011-10-11)
陳登銘
;
吳佳蓁
本發明係揭露一種真空紫外線激發之綠光螢光材料與其製造方法，該綠光螢光材料可為下列化學式所表示：(Zn1－xMnx)2(Ge1－ySiy)O4其中0.002≦x≦0.01，0≦y≦1，該綠光螢光材料可應用於電漿電視、綠色環保無汞背光源、無汞照明燈具、無汞發光裝置等。
NeuriteQuant: An open source toolkit for high content screens of neuronal Morphogenesis
(2011-10-11)
Dehmelt, Leif
;
Poplawski, Gunnar
;
Hwang, Eric
;
Halpain, Shelley
;
生物科技學系
Background: To date, some of the most useful and physiologically relevant neuronal cell culture systems, such as high density co-cultures of astrocytes and primary hippocampal neurons, or differentiated stem cell-derived cultures, are characterized by high cell density and partially overlapping cellular structures. Efficient analytical strategies are required to enable rapid, reliable, quantitative analysis of neuronal morphology in these valuable model systems. Results: Here we present the development and validation of a novel bioinformatics pipeline called NeuriteQuant. This tool enables fully automated morphological analysis of large-scale image data from neuronal cultures or brain sections that display a high degree of complexity and overlap of neuronal outgrowths. It also provides an efficient web-based tool to review and evaluate the analysis process. In addition to its built-in functionality, NeuriteQuant can be readily extended based on the rich toolset offered by ImageJ and its associated community of developers. As proof of concept we performed automated screens for modulators of neuronal development in cultures of primary neurons and neuronally differentiated P19 stem cells, which demonstrated specific dose-dependent effects on neuronal morphology. Conclusions: NeuriteQuant is a freely available open-source tool for the automated analysis and effective review of large-scale high-content screens. It is especially well suited to quantify the effect of experimental manipulations on physiologically relevant neuronal cultures or brain sections that display a high degree of complexity and overlap among neurites or other cellular structures.
High frequency flip chip package process of polymer substrate and structure thereof
(2011-10-11)
Chang Edward-yi
;
Hsu Li-Han
;
Oh Chee-Way
;
Wu Wei-Cheng
;
Wang Chin-te
In a high frequency flip chip package process of a polymer substrate and a structure thereof, the structure is a one-layer structure packaged by a high frequency flip chip package process to overcome the shortcomings of a conventional two-layer structure packaged by the high frequency flip chip package process. The conventional structure not only incurs additional insertion loss and return loss in its high frequency characteristic, but also brings out a reliability issue. Thus, the manufacturing process of a ceramic substrate in the conventional structure still has the disadvantages of a poor yield rate and a high cost.
適用於粗略與時間可調性視訊編碼之低複雜度宏塊模式決定與動態向量估計快速演算法
(2011-10-11)
林鴻志
;
彭文孝
;
杭學鳴
本發明所提出之快速演算法提供一種分層適應模式判斷演算法與一針對具有粗略可調性(CGS)與時間可調性之可調性視訊編碼(SVC)運作之移動搜索方案，其編碼方式能夠根據不同應用場合(如：網路頻寬限制)，同時提供數種視訊品質(即粗略可調性)與視訊畫面幀數播放速率(即時間可調性)。為加快編碼器速度且最小化編碼效能損失，針對編碼層間的計算繁冗性加以考量。根據宏塊(MB)編碼模式及參照/基本層的量子化參數(Qp)，遞歸性地使用一對照表以判定加強層上欲測試的宏塊模式。此外，為避免完全移動估測，適應性地複用基本層的參照畫面索引，並且根據加強層的宏塊切割，由基本層的移動向量或加強層的移動向量預測中妥善選擇移動估測的搜索起始點。本發明係經使用一基本層、三粗略可調層、三參照畫面及8和16組群畫面尺寸於CIF及4CIF解析之標準序列測試。相較於JSVM 8的模式判斷演算法，本發明於整體編碼時間平均提供76%之改進，且平均僅增加1%以下之位元傳輸率及0.01dB以下之Y-PSNR損失。
Wide bandgap n-type and p-type semiconductor porous junction devices as photovoltaic cells
(2011-10-12)
Lin, Yuan-Pai
;
Chao, Yu-Chiang
;
Meng, Hsin-Fei
;
Zan, Hsiao-Wen
;
Horng, Sheng-Fu
In junction absorber photovoltaics doped wide bandgap n-type and p-type semiconductors form a porous interpenetrating junction structure with a layer of low bandgap absorber at the interface. The doping concentration is high enough such that the junction depletion width is smaller than the pore size. The highly conductive neutral region then has a dentrite shape with fingers reaching the absorber to effectively collect the photo-carriers swept out by the junction electric field. With doping of 10(19) cm(-3) corresponding to a depletion width of 25 nm, pore size of 32 nm, absorber thickness close to exciton diffusion length of 17 nm, absorber bandgap of 1.4 eV and carrier mobility over 10(-5) cm(2) V(-1) s(-1), numerical calculation shows the power conversion efficiency is as high as 19.4%. It rises to 23% for a triplet exciton absorber.
通往宗教聖域的心靈之旅：伊里亞德的《聖與俗:宗教的本質》
(2011-10-12)
蔡源林
;
開放教育推動中心
;
Open Education Office
課程首頁本課程是由交通大學新文藝復興閱讀計畫提供。 96 年 8 月當各大學紛紛摩拳擦掌準備迎接新生的同時，交通大學校長吳重雨則因為一則來自於七月份泰晤士報，有關於英國首相布朗公布其夏日讀書清單的新聞中，看到了他對知識的尊重。在這同時，吳重雨校長也思考著，要如何為學生準備追求知識的環境和激發他們對知識的尊重與喜愛。台積電張忠謀董事長曾陳述他 18 歲進入哈佛那一年，博覽文史哲理工經典群籍，至此奠定了他求知的基礎，並借海明威名言，將其改為「哈佛這一年為人生可帶走的盛宴。」吳重雨校長以張董事長的學習為借鏡，認為學生固然能藉由自我閱讀的方式學習到豐沛的知識，但透過名人、大師親臨現場地介紹經典書籍，更能加深學子們對於書籍的認識與興趣，這也是「新文藝復興閱讀計劃」 ( 以下簡稱 : 「經典名著選讀」 ) 活動展開籌劃的緣由。於是，吳重雨校長便積極敦請「交大通識教育委員會」，接手籌備本計劃的相關活動，而該中心也成為實際施行本計畫的策動、開課以及認證單位。至此，期許交大學子藉由閱讀、聽講來提昇人文素養、開拓視野的「新文藝復興閱讀計劃」，就此展開。
Collinear Holographic Storage Medium
(2011-10-13)
SUN Ching-Cherng
;
YU Yeh-Wei
In the specification and drawings, a collinear holographic storage medium is described and shown with a recording layer, wherein the lateral linear thermal expansion coefficient of the recording layer is substantially the same as the linear thermal expansion coefficient of the material of the recording layer.
METHOD FOR EMBEDDING SECRET MESSAGE INTO PNG IMAGE
(2011-10-13)
LEE CHE WEI
;
TSAI WEN-HSIANG
A method for embedding a secret message into a PNG image comprises steps: converting a secret message into a plurality of secret codes; converting the secret codes into a plurality of secret shares; using a mapping process to modify values of the secret shares to approach a full-transparent value of an alpha channel of a PNG image, and sequentially embedding the mapped secret shares into the alpha channel. As the secret shares with high-transparent values, they leave the RGB channels untouched. Thus, embedding the secret shares into the PNG image does not make difference in the appearances between the secret-carrying image and the original PNG image. Therefore, the present invention can transmit secret message securely and realize covert communication.
Lattice Dynamics and Crystalline Properties of Wurtzite Zn(1-x)Mg(x)O Powders under High Pressure
(2011-10-13)
Lin, Y. C.
;
Tseng, C. L.
;
Chou, W. C.
;
Chia, C. H.
;
Han, T. C.
This investigation systematically studies the lattice dynamics and crystalline properties in Zn(1-x)Mg(x)O using high-pressure Raman spectroscopy. The incorporation of Mg and the application of external pressure cause distinct phonon vibrational behaviors in ZnO. Accordingly, the 202.7, 332.7, and 511.5 cm(-1) phonons, which have been controversially assigned, can be conclusively identified. Detailed Raman spectra reveal that the metallic phase transition of ZnO is complete by around 13.2 GPa, which pressure is found to decrease as the Mg content increases. Upon pressure release, an unusual hysteresis effect (>10.0 GPa) in Zn(1-x)Mg(x)O is observed. The degree of crystal ionicity and anisotropy importantly affects the phase transition pressure of Zn(1-x)Mg(x)O. Under ambient conditions, ZnO becomes more ionic upon the incorporation of Mg and becomes more covalent under higher pressure. These results are caused by the interplay between the pressure dependence of the high-frequency dielectric constant and Born's transverse dynamical effective charge. The E(1)-A(1) splitting of the longitudinal and transverse optical phonons is analyzed, yielding insight into the pressure-dependent crystal anisotropy of Zn(1-x)Mg(x)O.
Reading Device
(2011-10-13)
SUN Ching-Cherng
;
YU Yeh-Wei
A reading device includes a spatial light modulator, a zoom lens set, an object lens, an image sensor, and an adjusting module. The spatial light modulator provides a reading beam. The zoom lens set forms the reading beam into a real image. The object lens focuses the real image onto a collinear holographic storage medium and thus produces a diffraction signal. The image sensor converts the diffraction signal into an electric signal. The adjusting module adjusts the optical magnification of the zoom lens set according to the quality of the diffraction signal.
Lattice Dynamics and Crystalline Properties of Wurtzite Zn1-xMgxO Powders under High Pressure
(2011-10-13)
Lin, Y. C.
;
Tseng, C. L.
;
Chou, W. C.
;
Chia, C. H.
;
Han, T. C.
This investigation systematically studies the lattice dynamics and crystalline properties in Zn1-xMgxO using high-pressure Raman spectroscopy. The incorporation of Mg and the application of external pressure cause distinct phonon vibrational behaviors in ZnO. Accordingly, the 202.7, 332.7, and 511.5 cm(-1) phonons, which have been controversially assigned, can be conclusively identified. Detailed Raman spectra reveal that the metallic phase transition of ZnO is complete by around 13.2 GPa, which pressure is found to decrease as the Mg content increases. Upon pressure release, an unusual hysteresis effect (>10.0 GPa) in Zn1-xMgxO is observed. The degree of crystal ionicity and anisotropy importantly affects the phase transition pressure of Zn1-xMgxO. Under ambient conditions, ZnO becomes more ionic upon the incorporation of Mg and becomes more covalent under higher pressure. These results are caused by the interplay between the pressure dependence of the high-frequency dielectric constant and Born's transverse dynamical effective charge. The E-1-A(1) splitting of the longitudinal and transverse optical phonons is analyzed, yielding insight into the pressure-dependent crystal anisotropy of Zn1-xMgxO.
Improvement on the long-term stability of flexible plastic dye-sensitized solar cells
(2011-10-15)
Lee, Kun-Mu
;
Chiu, Wei-Hao
;
Lu, Ming-De
;
Hsieh, Wen-Feng
;
光電工程學系
We investigate the long-term stability of performance for plastic dye-sensitized solar cells (DSSCs) based on organic iodides (TBAI or PMII) in methoxypropionitrile-based electrolytes. Plastic DSSCs containing TBAI maintain 96.9% of baseline efficiency under more than 1000 h prolonged one sun light irradiation and thermal stress (60 degrees C) aging. The factors of device long-term stability, such as the effects of organic iodides, cell-sealing conditions, and the sheet resistance of indium tin oxide coated polyethylene naphthalate substrate (ITO/PEN) are discussed via using electrochemical impedance spectroscopy and electrical resistance measurement. (C) 2011 Elsevier B.V. All rights reserved.
Hydrogen etching of GaN and its application to produce free-standing GaN thick films
(2011-10-15)
Yeh, Yen-Hsien
;
Chen, Kuei-Ming
;
Wu, Yin-Hao
;
Hsu, Ying-Chia
;
Yu, Tzu-Yi
This work investigates the morphology of GaN etched in hydrogen (H(2)) at different temperatures, the activation energies of the rate-limiting steps of H(2) etching, and the overgrowth on a H(2)-etched GaN template. The surfaces of GaN have different profiles after being etched in H(2); they resemble a plane decorated with columns and mooring posts in a low-temperature etching condition, and with deep cavities in a high-temperature etching condition. The etched profiles show that H(2) etching has controllable etching directions: vertical and lateral. In a low-temperature condition, H(2) etching has both vertical and lateral etching directions; however, in a high-temperature condition, it has only the vertical etching direction. The activation energies of the rate-limiting steps under etching pressures of 100 and 700 Torr are estimated to be 3.22 and 3.77 eV, respectively. A thick GaN layer has been grown on a H2-etched GaN template, and it has self-separated from the underlying sapphire substrate. (C) 2011 Elsevier B.V. All rights reserved.
Effects of rapid thermal annealing on the structural properties of TiO(2) nanotubes
(2011-10-15)
Lin, J. Y.
;
Chou, Y. T.
;
Shen, J. L.
;
Yang, M. D.
;
Wu, C. H.
The structural properties of TiO(2) nanotubes with rapid thermal annealing (RTA) and traditional thermal annealing in O(2) were studied by X-ray diffraction (XRD) and Raman scattering measurements. From analyzing the line width of XRD and the correlation length of the Raman peak, we demonstrate that RTA can be an effective tool for amorphous-anatase transformation in TiO(2) nanotubes. The Raman peak redshifts and reduces its line width after thermal annealing and RTA, which may involves the reduction of oxygen-related defects. (C) 2011 Elsevier B. V. All rights reserved.
Effects of rapid thermal annealing on the structural properties of TiO2 nanotubes
(2011-10-15)
Lin, J. Y.
;
Chou, Y. T.
;
Shen, J. L.
;
Yang, M. D.
;
Wu, C. H.
The structural properties of TiO2 nanotubes with rapid thermal annealing (RTA) and traditional thermal annealing in O-2 were studied by X-ray diffraction (XRD) and Raman scattering measurements. From analyzing the line width of XRD and the correlation length of the Raman peak, we demonstrate that RTA can be an effective tool for amorphous-anatase transformation in TiO2 nanotubes. The Raman peak redshifts and reduces its line width after thermal annealing and RTA, which may involves the reduction of oxygen-related defects. (C) 2011 Elsevier B. V. All rights reserved.
Electrochemical degradation of Nafion ionomer to functionalize carbon support for methanol electro-oxidation
(2011-10-15)
Hsieh, Yu-Chi
;
Chen, Jing-Yu
;
Wu, Pu-Wei
;
材料科學與工程學系
;
Department of Materials Science and Engineering
An effective electrochemical route to produce functional groups on carbon surface is demonstrated. Cyclic voltammetric (CV) sweeps are performed in 0.5 M H(2)SO(4) electrolyte on electrodes containing carbon cloth, Vulcan XC72R, and Nation ionomer. With supply of ambient oxygen, the generation of hydroxyl radicals from the oxygen reduction reaction during CV cycles initiates the decomposition of Nation ionomer that leads to formation of oxygenated functional groups on the carbon surface. Ion chromatography confirms the dissolution of sulfate anions upon CV scans. Raman analysis suggests a minor alteration for the carbon structure. However, X-ray photoelectron spectroscopy indicates a significant increase of oxygenated functional groups in conjunction with notable reduction in the fluorine content. The amount of the oxygenated functional groups is determined by curve fitting of C is spectra with known constituents. These functional groups can also be found by immersing the as-prepared electrode in a solution containing concentrated residues from Nation ionomer decomposition. The functionalized electrode allows a 170% increment of Pt ion adsorption as compared to the reference sample. After electrochemical reductions, the functionalized electrode reveals significant improvements in electrocatalytic abilities for methanol oxidation, which is attributed to the oxygenated functional groups that facilitates the oxidation of CO on Pt. (C) 2011 Elsevier B.V. All rights reserved.
獵人足跡　泰雅風情
(2011-10-16)
林儀
;
Department of Communication and Technology
;
傳播與科技學系
現代科技發達的今日，仍有許多純樸的原住民們，運用老祖先傳承下來的技術，在山上過著傳統而清靜的生活。現在，請卸下所有文明的包袱，到鹿場部落來一場真真實實的獵人之旅吧！