Browsing by Issue Date, starting with "2013-11-15"

Now showing 1 - 20 of 30116

Words with a generalized restricted growth property
(2013-11-15)
Fuchs, Michael
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Prodinger, Helmut
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應用數學系
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Department of Applied Mathematics
Words where each new letter (natural number) can never be too large, compared to the ones that were seen already, are enumerated. The letters follow the geometric distribution. Also, the maximal letter in such words is studied. The asymptotic answers involve small periodic oscillations. The methods include a chain of techniques: exponential generating function, Poisson generating function, Mellin transform, depoissonization. (C) 2012 Royal Dutch Mathematical Society (KWG). Published by Elsevier B.V. All rights reserved.
Growth of optical-quality, uniform In-rich InGaN films using two-heater metal-organic chemical vapor deposition
(2013-11-15)
Fu, S. F.
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Chen, C. Y.
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Li, F. W.
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Hsu, C. H.
;
Chou, W. C.
Good-optical-quality, thick InxGa1-xN films with high In content were grown using a homemade two-heater metal-organic chemical vapor deposition system. By varying the growth temperature, it was Found that the In composition of the InGaN epilayer varied from 18 to 59% as the substrate temperature decreased from 750 to 625 degrees C. Our results show that the optical properties in terms of the emission peak wavelength and linewidth are uniformly distributed throughout the entire 2 in. wafer for the x=0.40 InGaN sample. The resultant mean peak wavelength and FWHM are 808 +/- 6 nm and 229 +/- 18 meV, respectively, at 18 K. In addition, for the InGaN film grown at 625 degrees C, a noticeable decrease in the In composition occurred when the ceiling temperature was >800 degrees C, indicative of the occurrence of parasitic reactions in the gas phase. (C) 2013 Elsevier B.V. All rights reserved.
A compact biological cell irradiation system with a Van de Graaff accelerator
(2013-11-15)
Cho, I. C.
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Niu, H.
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Chen, C. H.
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Chou, W. T.
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Yu, Y. C.
This report describes the development of a compact microcell irradiation system in the 3 MV MN Van de Graaff accelerator in the Accelerator Laboratory of National Tsing Hua University (NTHU). The main feature of this system is backscattering, a technique whereby a 100 nm gold scattering foil is placed in the center of a scattering chamber, instead of a 90 bending magnet. The incident particles produced by the accelerator bombard the scattering foil and scatter isotropically. A set of micro pinholes was installed above the scattering foil and directed the 90 scattering particles to irradiate the cell target. This innovation simplifies the system design and massively reduces the cost and space requirements for system construction. (C) 2013 Elsevier B.V. All rights reserved.
Design and demonstration of high quality-factor H1-cavity in two-dimensional photonic crystal
(2013-11-15)
Fu, Ying-Jhe
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Lee, Yi-Shan
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Lin, Sheng-Di
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電子工程學系及電子研究所
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Department of Electronics Engineering and Institute of Electronics
We introduce a method for designing an H1 photonic crystal cavity to enhance its quality factor (Q factor). The highest theoretical Q factor of 120,000 is obtained. The Fourier transformation of field distribution shows that the enhancement arises from the component reduction of a leaky mode. The Q-factor improvement has also been demonstrated experimentally with the highest value of 11,700. Our design could be useful for studying light-matter interaction in an H1 cavity as the mode volume only increases slightly. (C) 2013 Optical Society of America
New TDR waveguides and data reduction method for monitoring of stream and drainage stage
(2013-11-15)
Chung, Chih-Chung
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Lin, Chih-Ping
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Wu, I. -Ling
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Chen, Ping-Hung
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Tsay, Ting-Kuei
Less known in the field of hydrological measurements in civil engineering, time domain reflectometry (TDR) has been developed as a new solution to some of the more difficult level measurement problems. This study applied TDR methodology to provide two new designs for a water level sensing waveguide that can be applied in difficult field conditions such as in an underpass, tunnel, culvert, or sewer, etc. Two types of water level sensing waveguides are presented, including a rigid assembled coaxial pipe and a flexible adhered parallel wire. The corresponding data reduction procedure is also proposed to account for uncertainty of travel time analysis and calibrate the velocity of pulse propagation along the waveguides. The satisfactory performance of both the proposed TDR waveguides and data reduction method was experimentally validated. A field case study further demonstrated the feasibility of the TDR technique for water level measurements under typical urban drainage conditions. (C) 2013 Elsevier B.V. All rights reserved.
Thermoelectric properties of bismuth-selenide films with controlled morphology and texture grown using pulsed laser deposition
(2013-11-15)
Phuoc Huu Le
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Liao, Chien-Neng
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Luo, Chih Wei
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Lin, Jiunn-Yuan
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Leu, Jihperng
Polycrystalline, thermoelectric thin films of bismuth selenide (Bi2Se3) were grown on SiO2/Si (1 1 1) substrates, using pulsed laser deposition (PLD). Bi2Se3 films with highly c-axis-oriented and controlled textures were fabricated by maintaining the helium gas pressure (P) between 0.7 and 173 Pa and the substrate temperature (T-s) between 200 and 350 degrees C. The carrier concentration (n) of films decreased with increasing P, which was attributed to the increase of Se concentration from Se deficiency (P <= 6.7 Pa) to stoichiometry to slight Se enrichment (P >= 40 Pa). The Seebeck coefficient (S) was enhanced considerably because of the reduction in n, following the S similar to n(-2/3) relation approximately. The average grain size increased from approximately 100 to 500 nm when T-s was raised from 200 to 350 degrees C, resulting in enhanced carrier mobility (mu) and electrical conductivity (sigma) and a reduced full width at half maximum of (0 0 6) peaks. The shape of grains transformed from rice-like at T-s of 200-250 degrees C to layered-hexagonal platelets (L-HPs) or super-layered flakes (S-LFs) at T-s of 300-350 degrees C. Films that were grown at 300 degrees C and 40 Pa and contained highly c-axis oriented L-HPs possessed the highest power factor (PF =S-2 sigma), which reached 5.54 mu W cm(-1) K-2, where S=75.8 mu V/K and sigma = 963.8 S cm(-1). (C) 2013 Elsevier B.V. All rights reserved.
Incorporating customer satisfaction into the decision-making process of product configuration: a fuzzy Kano perspective
(2013-11-15)
Wang, Chih-Hsuan
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工業工程與管理學系
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Department of Industrial Engineering and Management
In an era of global customisation, buyers continuously benefit from the flexibility of selecting their desired options when making decisions on purchasing. Most manufacturing companies, however, need to balance the trade-offs between enhancing product variety and controlling manufacturing cost. In order to fulfil the goal of market-oriented product development, customer satisfaction needs to be well incorporated into the decision-making process of product configuration. Therefore, a hybrid framework is presented to address two critical issues in new product development: customer satisfaction and product configuration. In the beginning, fuzzy Kano model is employed to elicit customer perception of product attributes and extract customer satisfaction. Consecutively, information entropy is used for deriving the important weights of product attributes. Lastly, by means of Technique for Order Preference by Similarity to Ideal Solution, competing design alternatives are efficiently prioritised and configured. In particular, a case study on configuring varieties of smart pads is demonstrated to justify the validity of the proposed framework. With consideration of and the pricing policies of multi-segments, a systematic framework to effectively bridge customer satisfaction and product configuration is offered for the academics and industrial practitioners.
Conjugation of Benzylvanillin and Benzimidazole Structure Improves DNA Binding with Enhanced Antileukemic Properties
(2013-11-15)
Al-Mudaris, Zena A.
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Majid, Aman S. A.
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Ji, Dan
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Al-Mudarris, Ban A.
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Chen, Shih-Hsun
Benzyl-o-vanillin and benzimidazole nucleus serve as important pharmacophore in drug discovery. The benzyl vanillin (2-(benzyloxy)-3-methoxybenzaldehyde) compound shows anti-proliferative activity in HL60 leukemia cancer cells and can effect cell cycle progression at G2/M phase. Its apoptosis activity was due to disruption of mitochondrial functioning. In this study, we have studied a series of compounds consisting of benzyl vanillin and benzimidazole structures. We hypothesize that by fusing these two structures we can produce compounds that have better anticancer activity with improved specificity particularly towards the leukemia cell line. Here we explored the anticancer activity of three compounds namely 2-(2-benzyloxy-3-methoxyphenyl)-1H-benzimidazole, 2MP, N-1-(2-benzyloxy-3-methoxybenzyl)-2-(2-benzyloxy-3-methoxyphenyl)-1H-benzimidazole, 2XP, and (R) and (S)-1-(2-benzyloxy-3-methoxyphenyl)-2, 2, 2-trichloroethyl benzenesulfonate, 3BS and compared their activity to 2-benzyloxy-3-methoxybenzaldehyde, (Bn1), the parent compound. 2XP and 3BS induces cell death of U937 leukemic cell line through DNA fragmentation that lead to the intrinsic caspase 9 activation. DNA binding study primarily by the equilibrium binding titration assay followed by the Viscosity study reveal the DNA binding through groove region with intrinsic binding constant 7.39 mu M/bp and 6.86 mu M/bp for 3BS and 2XP respectively. 2XP and 3BS showed strong DNA binding activity by the UV titration method with the computational drug modeling showed that both 2XP and 3BS failed to form any electrostatic linkages except via hydrophobic interaction through the minor groove region of the nucleic acid. The benzylvanillin alone (Bn1) has weak anticancer activity even after it was combined with the benzimidazole (2MP), but after addition of another benzylvanillin structure (2XP), stronger activity was observed. Also, the combination of benzylvanillin with benzenesulfonate (3BS) significantly improved the anticancer activity of Bn1. The present study provides a new insight of benzyl vanillin derivatives as potential anti-leukemic agent.
Efficient numerical methods for computing ground states of spin-1 Bose-Einstein condensates based on their characterizations
(2013-11-15)
Bao, Weizhu
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Chern, I-Liang
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Zhang, Yanzhi
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應用數學系
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數學建模與科學計算所(含中心)
In this paper, we propose efficient numerical methods for computing ground states of spin-1 Bose-Einstein condensates (BECs) with/without the Ioffe-Pritchard magnetic field B (X). When B (X) not equal 0, a numerical method is introduced to compute the ground states and it is also applied to study properties of ground states. Numerical results suggest that the densities of m(F) = +/- 1 components in ground states are identical for any nonzero B(x). In particular, if B(x) B not equal 0 is a constant, the ground states satisfy the single-mode approximation. When B(x) 0, efficient and simpler numerical methods are presented to solve the ground states of spin-1 BECs based on their ferromagnetic/antiferromagnetic characterizations. Numerical simulations show that our methods are more efficient than those in the literature. In addition, some conjectures are made from our numerical observations. (C) 2013 Elsevier Inc. All rights reserved.
Biscalix[4]arene Derivative As a Very Efficient Phase Selective Gelator for Oil Spill Recovery
(2013-11-15)
Tsai, Chia-Chen
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Cheng, Ying-Tsai
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Shen, Li-Ching
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Chang, Kai-Chi
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Ho, I-Ting
A biscalixarene framework, without long alkyl chains, has been readily synthesized in three steps starting from the parent calix[4]arene. The biscalix[4]arene 1 was able to form organogels in various alcoholic solvents; furthermore, it exhibited an excellent phase selective gelation property that is potentially useful in oil spill recovery.
追日裝置
(2013-11-16)
謝侑龍
;
張翼
;
鄭時龍
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成維華
;
呂秉翰
一種追日裝置，包括基座、設於該基座上之第一傳動器、第二傳動器與支柱、樞接於該支柱以承載太陽能發電模組之承載座、樞接該第一傳動器與該承載座之第一支撐桿以及樞接該第二傳動器與該承載座之第二支撐桿。本發明具有高結構剛性及高承載能力，除可抗強風外，尚具有高追蹤精度及較大的旋轉角度，使太陽能板能準確且長時間地對準太陽，因此可大幅提升太陽能發電模組之效能。
具自行車架外形之嵌入式工業控制器
(2013-11-16)
曾詠勝
;
施境瑋
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鄭時龍
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張翼
;
張嘉華
一種具自行車架外形之嵌入式工業控制器，包括由上管、下管、前叉、後下叉、後上叉以及座管所形成之具有自行車架外形之機殼、主機板、電池模組、電源電氣埠以及複數訊號輸入及輸出電氣埠。本發明之具自行車架外形之嵌入式工業控制器不僅考慮了習知技術中機殼對防塵防震、散熱以及外型美感之要求，更可結合輪圈、輪胎、坐墊、把手、踏板以及齒輪傳動裝置等自行車配件，以成為具有邏輯控制，時序控制及模擬控制等各種控制功能之自行車。
微型顯微鏡及其光學元件的製作方法
(2013-11-16)
孫慶成
;
余業緯
;
鄭智元
一種用於微型顯微鏡的光學元件的製作方法包括使一訊號光及一參考光入射至一光學材料；訊號光與參考光干涉使光學材料上形成複數光柵。本發明亦揭露一種微型顯微鏡。
包含有具優選方向成長之Ｃｕ６Ｓｎ５晶粒之電性連接結構及其製備方法
(2013-11-16)
陳智
;
林漢文
本發明係有關於一種包含有具優選方向成長之Cu6Sn5晶粒之電性連接結構及其製備方法。本發明之電性連接結構之製備方法,包括步驟:(A)提供一第一基板;(B)於第一基板之部分表面形成一第一奈米雙晶銅層;(C)使用一銲料將第一基板與一第二基板連接,第二基板具有一第二電性墊,第二電性墊包括第二奈米雙晶銅層,且銲料係配置於第一及第二奈米雙晶銅層之間;以及(D)以200℃至300℃的溫度進行迴焊(reflow)使銲料部分轉換為一介金屬化合物(intermetallic compound,IMC)層,且介金屬化合物層係包括具優選方向(preferred orientation)成長之Cu6Sn5晶粒;其中,第一及第二奈米雙晶銅層之50%以上的體積係分別包括雙晶銅晶粒。
具虛擬機器感知能力程式之偵測方法以及系統
(2013-11-16)
許家維
;
李秉翰
;
謝續平
一種具虛擬機器感知能力程式之偵測方法包含以下步驟:藉由至少一實體機器,提供數個虛擬機器。其中,虛擬機器之至少其中之二為異質虛擬機器。接收具感知虛擬機器功能之一樣品程式。使每一虛擬機器分別執行樣品程式。分別取得每一虛擬機器執行樣品程式之至少一執行追蹤紀錄。比對執行追蹤紀錄,以取得執行追蹤紀錄間所存在之至少一感知能力偵測點。接收一待驗證程式。判斷待驗證程式是否存在感知能力偵測點。其中,在待驗證程式存在感知能力偵測點時,判定待驗證程式具虛擬機器感知功能。
臨界電壓量測裝置
(2013-11-16)
莊景德
;
周世傑
;
林耕慶
;
王紹丞
;
林宜緯
本發明係揭露一種臨界電壓量測裝置，其係連接一六電晶體靜態隨機存取記憶體，此記憶體包含二反向器，其係分別連接一場效電晶體，其中一反向器之電源端為浮接，且與此反向器連接之場效電晶體之源極與汲極相互短路，並利用此架構施加不同偏壓，再配合二電壓選擇器、一電阻、一放大器與上述記憶體構成負回授連接方式，以量測出另一反向器之二場效電晶體，及與其連接之場效電晶體之臨界電壓。本發明不用改變六電晶體靜態隨機存取記憶體之物理結構，就可以用單一電路架構量測三顆場效電晶體之臨界電壓，大幅降低製程、量測與時間成本。
主動式Ｘ光感測電路及其感測方法
(2013-11-16)
戴亞翔
;
周祿盛
;
陳柏成
本發明之一目的係提供一種主動式X光感測電路及其感測方法,其係應用於X光成像面板,其中X光感測電路具有兩列畫素電路,其係共用一條掃描線,每條資料線係連接至兩個開關,以分別於補償時切換至電流源,或讀取時切換至放大器,藉由搭配特定之掃描線訊號,上一列畫素電路係補償臨界電壓變異,同時,下一列進行讀取動作,依序操作下,感測電路陣列可於一次掃描下同時完成補償與感測,降低漏電流之影響。
光學膜及使用光學膜之背光模組
(2013-11-16)
胡雅文
;
潘瑞文
提供一種用於背光模組的光學膜。光學膜包含基層、數個週期排列的反射凸部以及數個週期排列的準直部。反射凸部設置於基層的第一表面上。反射凸部包含至少一反射側面以及一入光底面，其入光底面用以接觸導光板。準直部設置於基層的第二表面上，且反射凸部分別對應準直部。在成對的反射凸部及準直部中，反射凸部的中心軸線大致重合準直部的中心軸線。此外，提供一種使用此光學膜的背光模組。
時序設計變更的方法
(2013-11-16)
張華宇
;
江蕙如
;
張耀文
一種利用路徑平滑化之時序設計變更的方法,首先將一電路的複數個時序違規路徑分解成複數個違規路徑區段。接著對各該違規路徑區段計算出一參數平滑曲線,且於該參數平滑曲線上產生複數個參考點。接著對各該違規路徑區段的各元件計算一可修性參數,該可修性參數與該元件及其對應之參考點之間的距離有關。接著根據各該元件的可修性參數對各該違規路徑區段選取至少一元件。接著為各該被選取的元件選取一備用元件,並將該備用元件配置於該被選取的元件所對應之違規路徑區段中。藉由該參數平滑曲線,元件的時序關鍵性能被較準確地判斷。
互動視訊平台系統及方法
(2013-11-16)
傅心家
;
曾政龍
;
戴永彰
;
林金昇
;
李宜叡
本發明提供一種互動視訊平台系統及方法,複數使用者自客戶端以瀏覽器方式連線到一互動視訊平台上,與互動視訊平台上其他連線客戶端之使用者進行互動視訊活動。提供虛擬攝影機及虛擬透明紙等軟件及方法提升使用者間互動連線活動之品値及效率。互動視訊平台在任一連線活動結束後將連線活動資訊整理編輯,即時存到中央資料庫供使用者日後瀏覽及查閱。