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

Now showing 1 - 20 of 40160

High luminance hybrid light guide plate for backlight module application
(2011-10-10)
Pan, Jui-Wen
;
Fan, Chen-Wei
;
光電系統研究所
;
生醫電子轉譯研究中心
;
Institute of Photonic System
We introduce a hybrid backlight module, which consists of a hybrid light guide plate (HLGP) and a brightness enhancement film (BEF). The HLGP comprises functions of a conventional light guide plate, a reflector, and a BEF. The HLGP allows one-dimensional rays to be collimated. We add a BEF above the HLGP, and let the crossed-dimension rays to be collimated. Comparing with the conventional edge-lit backlight module, the optical efficiency improves to 1.3-times and the on-axis luminance improves to 3.7-times by using the hybrid backlight module. (C) 2011 Optical Society of America
Ultra high-density silicon nanowires for extremely low reflection in visible regime
(2011-10-10)
Pei, Ting-Hang
;
Thiyagu, Subramani
;
Pei, Zingway
;
友訊交大聯合研發中心
;
D Link NCTU Joint Res Ctr
We fabricated large-area, vertically aligned silicon nanowire (SiNW) arrays on Si substrates employing catalytic etching on a polystyrene nanosphere template. The density of SiNWs was as high as 10(10)/cm(2), and the bottom radii of SiNWs ranged between 30 and 60 nm. The reflection from the SiNW layer was approximately 0.1% over the spectral range of 300-800nm for SiNWs longer than 750 am. Effective medium theory was applied to explain this extremely low reflection, and it was confirmed that the incident light scatters randomly inside cone-like SiNWs, which lengthens the actual traveling path of light. (C) 2011 American Institute of Physics. [doi10.1063/1.3650266]
Photo-Fenton pretreatment of carbofuran - Analyses via experimental design, detoxification and biodegradability enhancement
(2011-10-10)
Lu, Li-An
;
Ma, Ying-Shih
;
Kumar, Mathava
;
Lin, Jih-Gaw
;
環境工程研究所
The central composite design (CCD) and response surface methodology (RSM) were employed to evaluate the effect of H(2)O(2) dosage rate (1-10 mg L(-1) min(-1)) and Fe(3+) dosage (1-100 mg L(-1)) in the photo-Fenton treatment of carbofuran and to develop the second-order polynomial equations in terms of carbofuran and dissolved organic carbon (DOC) removals and BOD(5)/DOC ratio with different reaction times. Both H(2)O(2) dosage rate and Fe(3+) dosage have significant effects on the dependable variables. Based on the results of carbofuran removal and BOD(5)/DOC ratio, H(2)O(2) dosage rate of 5.4 mg L(-1) min(-1) and Fe(3+) dosage of 59 mg L(-1) were found to be the favorable reagent dosages for carbofuran degradation. Under these conditions, the toxicity unit measured by Microtox(R) test with 5 min exposure was decreased from 47 to 6 and the biodegradability evaluated by BOD(5)/COD ratio was increased from 0 to 0.76 after 60 min reaction. The results obtained in this study demonstrate that the photo-Fenton process is a promising pretreatment before the application of biological treatment for carbofuran removal from contaminated water/wastewater. (C) 2011 Elsevier B.V. All rights reserved.
Improvement of the inter-electrode reproducibility of screen-printed carbon electrodes by oxygen plasma etching and an image color level method for quality control
(2011-10-10)
Chang, Yi-Huang
;
Hsu, Chuan-Liang
;
Yuan, Chiun-Jye
;
Tang, Shu-Fan
;
Chiang, Hui-Jean
Screen-printed carbon electrodes (SPCEs) were selectively etched by oxygen plasma. The coefficient of variance (CV) of inter-electrode reproducibility was reduced from 21.6 to 4.6. Studies of the surface by color-level-indexing histogram analysis. scanning electronic microscopy (SEM) and resistance revealed that the inter-electrode reproducibility correlated with complete etching of the resin binder from the SPCE surface. The quality of the electrode was differentiated by this color level index analysis. This technique has great potential for application in on-line quality control of the SPCE plasma-treating process when integrated with suitable image processing software. (C) 2011 Elsevier B.V. All rights reserved.
Yeast cell cycle transcription factors identification by variable selection criteria
(2011-10-10)
Wang, Hsiuying
;
Wang, Yu-Han
;
Wu, Wei-Sheng
;
統計學研究所
;
Institute of Statistics
Identifying cell cycle transcription factors (TFs) is important for understanding the transcriptional regulation of the cell cycle process which controls the growth and development of all organisms. Existing computational approaches for identifying cell cycle TFs are mainly based on methods with a fixed selection criterion. That is, the same criterion was applied to each TF to determine whether it is a cell cycle TF or not. Since the characteristic of each TF may be quite different, it is not suitable to use a fixed selection criterion in identifying cell cycle TFs. Instead of using a fixed selection criterion, we propose a method with variable selection criteria to identify cell cycle TFs in yeast by integrating the ChIP-chip and cell cycle gene expression data. Our method is shown to outperform five existing methods which used the same ChIP-chip dataset as we did. Fifteen cell cycle TFs were identified by our approach, 12 of which are known cell cycle TFs, while the remaining three (Hap4, Reb1 and Tye7) are novel cell cycle TFs. The biological significance of our predictions is shown by four lines of indirect evidence derived from the protein-protein interaction data, TF mutant data, ChIP-chip data and the results of the previous computational studies. (C) 2011 Elsevier B.V. All rights reserved.
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
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Poplawski, Gunnar
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Hwang, Eric
;
Halpain, Shelley
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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
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Zan, Hsiao-Wen
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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.