Browsing by Issue Date, starting with "2014-01-11"

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多平面掃描洩漏波天線
(2014-01-11)
張榮原
;
陳富強
一種多平面掃描洩漏波天線，包括基板、第一天線串列、第二天線串列與多個控制單元。第一天線串列與第二天線串列相互交叉設置，以共用多個天線單元中的一預設天線單元。部分天線單元從預設天線單元的一第一與一第二傳輸線向外串接而形成第一天線串列，其餘的天線單元從預設天線單元的一第三與一第四傳輸線向外串接而形成第二天線串列。控制單元用以控制第一至第四傳輸線與這些天線單元之間的傳輸路徑，並致使洩漏波束切換至不同的掃描平面，且洩漏波束透過這些天線單元而隨著頻率的變化來進行掃描。
照明控制模組、包含其之攝影機及照明控制方法
(2014-01-11)
莊仁輝
;
羅國華
;
洪邦展
本發明提供一種照明控制模組、包含其之攝影機及照明控制方法。根據本發明之攝影機包含一感光模組、一發光模組以及一照明控制模組。該感光模組可接收來自該攝影機之一攝影方向上之一反射光線，並產生該攝影方向上之一影像。該發光模組向該攝影方向發射一光線。此外，該照明控制模組連接該發光模組，用以控制該發光模組所發射之該光線週期性地自一第一亮度變化至一第二亮度。
流體式光波導元件及其形成方法
(2014-01-11)
范士岡
;
簡家齊
;
盧羿彣
本發明提供一種流體式光波導元件及其形成方法，其是在包層流體中，藉由施加電場方式，驅動纖核流體於電極上。由於纖核流體是被電場所定義，所以各種二維形狀之纖核液體皆可藉由施加電壓所在的電極圖形上形成。本發明之流體式光波導元件擁有流體界面較平滑的優點，而且穩定的纖核與包層流體會消除流體流動時所產生的散射損失。
高速升壓之充電泵電路
(2014-01-11)
陳建廷
;
趙昌博
;
邵啟意
在此揭露一種充電泵電路(charge pump circuit)，其包含輸入訊號、二極體、第一控制開關、第二控制開關與充電元件。二極體用於控制輸入訊號的正向充電而防止該控制訊號的逆向漏電。當輸入訊號為第一電壓位準時，第一控制開關為關閉(close)，而當輸入訊號為第二電壓位準時，第一控制開關為開啟(open)。當輸入訊號為第一電壓位準時，第二控制開關為開啟(open)，而當輸入訊號為第二電壓位準時，第二控制開關為關閉(close)。每個充電元件電性連接該二極體，當輸入訊號為第一電壓位準時，電元件為充電狀態，而當輸入訊號為第二電壓位準時，充電元件為放電狀態。此充電泵電路可在一工作週期內完成升壓輸出電壓N倍的工作，大幅縮短升壓的時間。
辨識電器狀態的電力監測裝置及其電力監測方法
(2014-01-11)
曹孝櫟
;
賴易聖
;
林明駿
;
陳勇旗
一種辨識電器狀態的電力監測裝置及其電力監測方法，電力監測裝置包括量測模組以及變化偵測與搜尋模組。量測模組測量電源的電耗特性，並且變化偵測與搜尋模組偵測並計算電耗特性的變化。當偵測到變化時，變化偵測與搜尋模組依據此變化來搜尋電器特徵資料庫，以取得對應此變化的電器及其電器狀態。電力監測裝置依據變化偵測與搜尋模組產生之電器變化資料，記載電器的狀態及記錄其耗電情形，並透過比對電器特徵資料庫得知一電器相對於其他相同電器或具備相同功能之其他電器運作是否有效率，以達到節能效果。
可交聯之富勒烯衍生物及其反式結構有機太陽能電池
(2014-01-11)
許千樹
;
鄭彥如
;
謝朝翔
;
李佩蓉
本發明揭露一種可交聯之富勒烯衍生物及其反式結構有機太陽能電池。此可交聯之富勒烯衍生物包含有一富勒烯本體、一橋接官能基及一可交聯官能基。橋接官能基係接合於富勒烯本體與可交聯官能基之間。富勒烯本體可包含碳六十或碳七十之富勒烯，而橋接官能基可包含環烷類(cyclic hydrocarbon)或雜環(heterocyclic ring)基團。可交聯官能基則可包含一熱交聯官能基或一光交聯官能基。
全晶片上寬工作電壓溫度製程電壓的感測系統
(2014-01-11)
陳璽文
;
張銘宏
;
謝維致
;
黃威
本發明提供一種全晶片上寬工作電壓溫度製程電壓的感測系統，其係設置於一晶片上，該感測系統包含：一電壓感測裝置、一製程感測裝置、及一溫度感測裝置。其中，溫度感測裝置包含：一偏壓電流產生器、一環形振盪器、一固定脈衝產生器、一及閘、及一第一計數器。偏壓電流產生器依據晶片之工作電壓，而產生一與溫度相關之輸出電流。環形振盪器由輸出電流而產生一振盪訊號，固定脈衝產生器產生固定寬度之一脈衝訊號。第一及閘連接至環形振盪器及固定脈衝產生器，以對振盪訊號及脈衝訊號執行邏輯及運算，以產生一溫度感測訊號。
具有感測生理狀態之決策支援系統
(2014-01-11)
蕭子健
;
李柏明
;
謝岱凌
一種具有感測生理狀態之決策支援系統，係由一資料庫儲存一基準生理資料及一決策歷史資料，將一感測模組套接在一人體身上，感測該人體之生理狀態後，產生一生理訊號，並傳送至一處理模組，該處理模組接收到該生理訊號，便自該資料庫讀取該基準生理資料及該決策歷史資料，將該生理訊號與該基準生理資料及該決策歷史資料進行一分析動作，以產生一分析結果，最後由一顯示模組將該分析結果予以顯示，提供一使用者在決策時參考，以做出正確之決策。
使用無源極和汲極接面場效電晶體之基本互補式邏輯閘之構造及其製造方法
(2014-01-11)
莊紹勳
;
謝易叡
本發明提出一種使用無源極、汲極接面之場效電晶體之基本互補式邏輯閘之構造及其製造方法，於半導體晶圓(wafer)上，形成無源極和汲極接面之N通道電晶體及無源極和汲極接面之P通道電晶體，在電晶體間以導電之連接結構互相連接，形成基本互補式邏輯閘(如inverter,NAND,NOR等邏輯閘)。
應用於駐極體揚聲器模擬平台之參數鑑別方法及其最佳化方法
(2014-01-11)
白明憲
;
王俊仁
;
姜達銘
;
林書如
本發明提供一種應用於駐極體揚聲器模擬平台之參數鑑別方法及其最佳化方法，駐極體揚聲器包含電系統、聲學系統及機械系統，可用機電聲類比電路來進行分析模擬。將電系統及聲學系統映射至機械系統中，將機械系統與聲學系統耦合成機-聲系統並簡化成二階系統，藉由將駐極體揚聲器置入氣密之測試箱中量測可求得機-聲系統之參數，代入機電聲類比電路中以建立完整的機電聲類比電路，其可作為駐極體揚聲器之模擬平台，以準確模擬出駐極體揚聲器的聲壓響應。本發明更提供將駐極體揚聲器之結構進行最佳化之方法，藉由調整結構特性以提升駐極體揚聲器之聲壓響應及工作頻寬。
Performance of GaN-based light-emitting diodes fabricated using GaN epilayers grown on silicon substrates
(2014-01-13)
Horng, Ray-Hua
;
Wu, Bing-Rui
;
Tien, Ching-Ho
;
Ou, Sin-Liang
;
Yang, Min-Hao
Light extraction of GaN-based light-emitting diodes grown on Si(111) substrate (GaN-on-Si based LEDs) is presented in this study. Three different designs of GaN-on-Si based LEDs with the lateral structure, lateral structure on mirror/Si(100) substrate, and vertical structure on mirror/Si(100) substrate were epitaxially grown by metalorganic chemical vapor deposition and fabricated using chemical lift-off and double-transfer techniques. Current-voltage, light output power, far-field radiation patterns, and electroluminescence characteristics of these three LEDs were discussed. At an injection current of 700 mA, the output powers of LEDs with the lateral structure on mirror/Si(100) substrate and vertical structure on mirror/Si(100) substrate were measured to be 155.07 and 261.07 mW, respectively. The output powers of these two LEDs had 70.63% and 187.26% enhancement compared to that of LED with the lateral structure, respectively. The result indicated this vertical structure LED was useful in improving the light extraction due to an enhancement in light scattering efficiency while the high-reflection mirror and diffuse surfaces were employed. (C) 2014 Optical Society of America
Photovoltaic electrical properties of aqueous grown ZnO antireflective nanostructure on Cu(In,Ga)Se-2 thin film solar cells
(2014-01-13)
Wang, Yi-Chih
;
Lin, Bing-Yi
;
Liu, Po-Tsun
;
Shieh, Han-Ping D.
;
光電學院
A solution-grown subwavelength antireflection coating has been investigated for enhancing the photovoltaic efficiency of thin film solar cells. The 100-nm-height ZnO nanorods coating benefited the photocurrent of Cu(In, Ga) Se-2 solar cells from 31.7 to 34.5 mA/cm(2) via the decrease of surface light reflectance from 14.5% to 7.0%, contributed by the gradual refractive index profile between air and AZO window layer. The further reduction of surface reflectance to 2.3% in the case of 540-nm-height nanorods, yet, lowered the photocurrent to 29.5 mA/cm(2), attributed to the decrease in transmittance. The absorption effect of hydrothermal grown ZnO nanorods was explored to optimize the antireflection function in enhancing photovoltaic performances. (C) 2013 Optical Society of America
Fermi-level shifts in graphene transistors with dual-cut channels scraped by atomic force microscope tips
(2014-01-13)
Lin, Meng-Yu
;
Chen, Yen-Hao
;
Su, Chen-Fung
;
Chang, Shu-Wei
;
Lee, Si-Chen
We investigate the electronic properties of p-type graphene transistors on silicon dioxide with dual-cut channels that were scraped using atomic force microscope tips. In these devices, the current is forced to squeeze into the path between the two cuts rather than flow directly through the graphene sheet. We observe that the gate voltages with minimum current shift toward zero bias as the sizes of the dual-cut regions increase. These phenomena suggest that the Fermi levels in the dual-cut regions are shifted toward the Dirac points after the mechanical scraping process. (C) 2014 AIP Publishing LLC.
Hole injection and electron overflow improvement in InGaN/GaN light-emitting diodes by a tapered AlGaN electron blocking layer
(2014-01-13)
Lin, Bing-Cheng
;
Chen, Kuo-Ju
;
Wang, Chao-Hsun
;
Chiu, Ching-Hsueh
;
Lan, Yu-Pin
A tapered AlGaN electron blocking layer with step-graded aluminum composition is analyzed in nitride-based blue light-emitting diode (LED) numerically and experimentally. The energy band diagrams, electrostatic fields, carrier concentration, electron current density profiles, and hole transmitting probability are investigated. The simulation results demonstrated that such tapered structure can effectively enhance the hole injection efficiency as well as the electron confinement. Consequently, the LED with a tapered EBL grown by metal-organic chemical vapor deposition exhibits reduced efficiency droop behavior of 29% as compared with 44% for original LED, which reflects the improvement in hole injection and electron overflow in our design. (C)2014 Optical Society of America
Side Chain Structure Affects the Photovoltaic Performance of Two-Dimensional Conjugated Polymers
(2014-01-14)
Jiang, Jian-Ming
;
Lin, His-Kuei
;
Lin, Yu-Che
;
Chen, Hsiu-Cheng
;
Lan, Shang-Che
We used Stille coupling of electron-rich benzo[1,2-b:4,5-b']dithiophene (BDT) presenting conjugated alkylthiophene (T), alkylphenyl (P), or alkylfuran (F) side chains with electron-deficient alkoxy-modified 2,1,3-benzooxadiazole (BO) moieties to obtain a series of two-dimensional, conjugated, D-pi-A polymers (PBDTTBO, PBDTPBO, and PBDTFBO). The side chains of the BDT units altered the solubility, conformations, and electronic properties of the synthesized conjugated, polymers, allowing tuning of their photovoltaic properties when blended with fullerenes. Density functional theory calculations revealed that the presence of these side chain groups on the BDT donor units affected the torsion angles between the side chain groups and the conjugated main chains but resulted in only slightly different energy levels for the highest occupied molecular orbitals for these polymers, consistent with results obtained experimentally using cyclic voltammetry. These polymers displayed excellent thermal stabilities (5 wt % degradation temperatures: >330 degrees C) and broad spectral absorptions (from 450 to 700 nm). Transmission electron microscopy images revealed that the morphologies of active layers comprising these two-dimensional conjugated polymers and the fullerene derivative PC71BM did, however, vary substantially depending on the structure of the side chains that affects the solubility of the polymers. As a result, the efficiencies of photovoltaic devices incorporating PBDTFBO, PBDTPBO, or PBDTTBO polymers and PC71BM varied greatly, from 3.6 to 5.9%. When using 1-chloronaphthalene (1 vol %) or 1,8-diiodooctane (1 vol %) as an additive for processing the active layer, the power conversion efficiencies (PCEs) of photovoltaic devices incorporating blends of PBDTFBO, PBDTPBO, or PBDTTBO and PC71BM (1:2) improved to 5.4, 6.4, and 7.4%, respectively, due to their optimized morphologies, with the PCE of 7.4% being among the highest values reported for conjugated polymers involving BO moieties. Thus, the photovoltaic properties of these conjugated polymers were highly tunable through slight modifications of their side chain structures.
Rayleigh Instability in Polymer Thin Films Coated in the Nanopores of Anodic Aluminum Oxide Templates
(2014-01-14)
Tsai, Chia-Chan
;
Chen, Jiun-Tai
;
應用化學系
;
Department of Applied Chemistry
We study the Rayleigh instability of polystyrene (PS) thin films coated in the nanopores of anodic aluminum oxide (AAO) templates. After thermal annealing, the surface of the PS thin films undulates and the nanostructures transform from nanotubes to Rayleigh-instability-induced nanostructures (short nanorods with encapsulated air bubbles). With longer annealing times, the nanostructures further transform to nanorods with longer lengths. PS samples with two different molecular weights (24 and 100 kg/mol) are used, and their instability transformation processes are compared. The morphology diagrams of the nanostructures at different stages are also constructed to elucidate the mechanism of the morphology transformation.
Development of approximate solutions for contaminant transport through fractured media
(2014-01-15)
Liu, Chih-Tien
;
Yeh, Hund-Der
;
環境工程研究所
;
Institute of Environmental Engineering
Approximate solutions are sometimes very convenient and useful in engineering practices if the analytical solution is in a complicated form and difficult to evaluate accurately. This study develops four different approximate solutions for the problem of contaminant transport in fractured media presented in Tang et al. (1981) [1]. Their problem was solved analytically and the solutions of concentration distributions in the fracture and the rock expressed in infinite integrals had to rely on numerical approaches to obtain the results. The approximate solutions we develop herein include small-time solution, large-time solution, low-order approximate solution and high-order one based on the Pade approximation technique. The small-time solution gives very accurate concentrations at early times while the large-time solution yields excellent predictions at late times, as compared to Tang et al.\'s solution (Tang et al., 1981) [1]. In contrast, the solution based on low-order Fade approximation with polynomials of degree one in the numerator and degree two in the denominator gives fairly good predictions over the entire time domain, especially in the intermediate period as compared with those of the small-time and large-time solutions. In addition, the solution based on high-order Fade approximation with polynomials of degree two in the numerator and degree three in the denominator is also developed and its predicted concentrations are also compared with Tang et al.\'s solution (Tang et al., 1981) [1]. These results reveal that the Fade approximation has an advantage of being capable of producing more accurate results than the relationships of SPLT and LPST in the intermediate and late time periods. (C) 2014 Elsevier Inc. All rights reserved.
Andrographolide downregulates the v-Src and Bcr-Abl oncoproteins and induces Hsp90 cleavage in the ROS-dependent suppression of cancer malignancy
(2014-01-15)
Liu, Sheng-Hung
;
Lin, Chao-Hsiung
;
Liang, Fong-Ping
;
Chen, Pei-Fen
;
Kuo, Cheng-Deng
Andrographolide is a diterpenoid compound isolated from Andrographis paniculata that exhibits anticancer activity. We previously reported that andrographolide suppressed v-Src-mediated cellular transformation by promoting the degradation of Src. In the present study, we demonstrated the involvement of Hsp90 in the andrographolide-mediated inhibition of Src oncogenic activity. Using a proteomics approach, a cleavage fragment of Hsp90 alpha was identified in andrographolide-treated cells. The concentration- and time-dependent induction of Hsp90 cleavage that accompanied the reduction in Src was validated in RK3E cells transformed with either v-Src or a human truncated c-Src variant and treated with andrographolide. In cancer cells, the induction of Hsp90 cleavage by andrographolide and its structural derivatives correlated well with decreased Src levels, the suppression of transformation, and the induction of apoptosis. Moreover, the andrographolide-induced Hsp90 cleavage, Src degradation, inhibition of transformation, and induction of apoptosis were abolished by a ROS inhibitor, N-acetyl-cysteine. Notably, Hsp90 cleavage, decreased levels of Bcr-Abl (another known Hsp90 client protein), and the induction of apoptosis were also observed in human K562 leukemia cells treated with andrographolide or its active derivatives. Together, we demonstrated a novel mechanism by which andrographolide suppressed cancer malignancy that involved inhibiting Hsp90 function and reducing the levels of Hsp90 client proteins. Our results broaden the molecular basis of andrographolide-mediated anticancer activity. (C) 2013 Elsevier Inc. All rights reserved.
Is energy pooling necessary in ultraviolet matrix-assisted laser desorption/ionization?
(2014-01-15)
Lin, Hou-Yu
;
Song, Botao
;
Lu, I-Chung
;
Hsu, Kuo-Tung
;
Liao, Chih-Yu
RATIONALEEnergy pooling has been suggested as the key process for generating the primary ions during ultraviolet matrix-assisted laser desorption/ionization (UV-MALDI). In previous studies, decreases in fluorescence quantum yields as laser fluence increased for 2-aminobenzoic acid, 2,5-dihydroxybenzoic acid (2,5-DHB), and 3-hydroxypicolinic acid were used as evidence of energy pooling. This work extends the research to other matrices and addresses whether energy pooling is a universal property in UV-MALDI. METHODSEnergy pooling was investigated in a time-resolved fluorescence experiment by using a short laser pulse (355nm, 20ps pulse width) for excitation and a streak camera (1ps time resolution) for fluorescence detection. RESULTSThe excited-state lifetime of 2,5-DHB decreased with increases in laser fluence. This suggests that a reaction occurs between two excited molecules, and that energy pooling may be one of the possible reactions. However, the excited-state lifetime of 2,4,6-trihydroxyacetophenone (THAP) did not change with increases in laser fluence. The upper limit of the energy pooling rate constant for THAP is estimated to be approximately 100-500 times smaller than that of 2,5-DHB. CONCLUSIONSThe small energy pooling rate constant for THAP indicates that the potential contribution of the energy pooling mechanism to the generation of THAP matrix primary ions should be reconsidered. Copyright (c) 2013 John Wiley & Sons, Ltd.
Structural characterizations of PtRu nanoparticles by galvanostatic pulse electrodeposition
(2014-01-15)
Hsieh, Yu-Chi
;
Chang, Li-Chung
;
Tseng, Yuan-Chieh
;
Wu, Pu-Wei
;
Lee, Jyh-Fu
We demonstrate that the compositions and structures of PtRu nanoparticles can be altered via adjusting plating variables during galvanostatic pulse electrodeposition. During current-on time (Ton), both Pt and Ru are deposited according to their respective diffusion-limiting current. However, during current-off time (Toff), due to difference in the redox potentials, a displacement reaction is occurring that leads to the reduction of Pt ions from the electrolyte while the Ru atoms in the PtRu nanoparticles experience oxidation reaction and corrosive dissolution simultaneously. Therefore, the duty cycle, defined as Ton/(Ton + Toff), serves as an indicator for the severity of displacement reaction that affects the PtRu makeup. Inductively-coupled mass spectrometry determines the composition as Pt83Ru17, Pt64Ru36, and Pt53Ru47 for duty cycles of 0.077, 0.111, and 0.333, respectively. Images from transmission electron microscope exhibit nanoparticles in sizes of 4-11 nm. Analysis from extended X-ray absorption fine structure (EXAFS) suggests that Pt atoms tend to segregate outward and reside at the alloy's surface upon the displacement reaction. Composition profiles from line scans of energy dispersive X-ray spectroscopy are consistent with atomic structure revealed by EXAFS. (C) 2013 Elsevier B.V. All rights reserved.