Browsing by Issue Date, starting with "2008-08-17"

Now showing 1 - 20 of 54832

POLY 368-Synthesis of photoisomerizable block copolymers by atom transfer radical polymerization
(2008-08-17)
Huang, Chih-Feng
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Matyjaszewski, Krzysztof
;
Chang, Feng-Chih
;
Russell, Thomas P.
;
應用化學系
INOR 423-Fabrication of organic modified mesoporous TiO2 with high photocatalytic activity
(2008-08-17)
Chang, Sue-min
;
Shih, Chia-hsuan
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環境工程研究所
;
Institute of Environmental Engineering
POLY 467-Synthesis and electroluminescent properties of polyacetylenes and poly(2,3-diphenyl-1,4-phenylene vinylene) derivatives
(2008-08-17)
Hsu, Chain-Shu
;
應用化學系
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Department of Applied Chemistry
POLY 369-Controllably living polymerizations of poly(e-caprolactone)-block-poly(4-vinylpyridine) for two-phase extraction of metal ions
(2008-08-17)
Lu, Chu-Hua, Jr.
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Huang, Chih-Feng
;
Chang, Feng-Chih
;
應用化學系
;
Department of Applied Chemistry
PMSE 173-Multifunctional amphiphilic block copolymers for bioapplications
(2008-08-17)
Tian, Yanqing
;
Chen, Ching-Yi
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Cheng, Yen-Ju
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Jang, Sei-Hum
;
Jen, Alex K-Y.
INOR 401-Comparison of sulfated and phosphated zirconia on proton conductivity: Effect of surface acidic properties
(2008-08-17)
Sung, Pin-Hsin
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Chang, Sue-Min
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環境工程研究所
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Institute of Environmental Engineering
INOR 685-Preparation of surface salicylic acid modified titanium dioxide photocatalyst using microwave assisted method
(2008-08-17)
Chang, Sue-min
;
Chen, Tzu-yin
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環境工程研究所
;
Institute of Environmental Engineering
PMSE 229-Synthesis and characterization of stimuli-responsive ZnS/PNIPAM hollow spheres
(2008-08-17)
Fu, Huei-Kuan
;
Huang, Chih-Feng
;
Kuo, Shiao-Wei
;
Chang, Feng-Chih
;
應用化學系
Highly selective fluorescent sensing of Cu(2+) ion by an arylisoxazole modified calix[4]arene
(2008-08-18)
Chang, Kai-Chi
;
Luo, Li-Yang
;
Diau, Eric Wei-Guang
;
Chung, Wen-Sheng
;
應用化學系
A novel fluorescent chemosensor 1 with two anthraceneisoxazolymethyl groups at the lower rim of calix[4]arene has been synthesized, which revealed a dual emission (monomer and excimer) when excited at 375 nm. This chemosensor displayed a selective fluorescence quenching only with Cu(2+) ion over all other metal ions examined. When Cu(2+) ion was bound to 1, the fluorescence intensities of both monomer and excimer were quenched. Furthermore, the association constant for the 1:1 complex of 1.Cu(2+) was determined to be (1.58 +/- 0.03) x 10(4) M(-1). (c) 2008 Elsevier Ltd. All rights reserved.
Synthesis design of artificial magnetic metamaterials using a genetic algorithm
(2008-08-18)
Chen, P. Y.
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Chen, C. H.
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Wang, H.
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Tsai, J. H.
;
Ni, W. X.
In this article, we present a genetic algorithm (GA) as one branch of artificial intelligence (AI) for the optimization-design of the artificial magnetic metamaterial whose structure is automatically generated by computer through the filling element methodology. A representative design example, metamaterials with permeability of negative unity, is investigated and the optimized structures found by the GA are presented. It is also demonstrated that our approach is effective for the synthesis of functional magnetic and electric metamaterials with optimal structures. This GA-based optimization-design technique shows great versatility and applicability in the design of functional metamaterials. (C) 2008 Optical Society of America.
Micro objective lens with NA 0.65 for the blue-light small-form-factor optical pickup head
(2008-08-18)
Shih, Hsi-Fu
;
Lee, Yuan-Chin
;
Chiu, Yi
;
Chao, David Wei-Chung
;
Lin, Gung-Ding
A micro objective lens with the numerical aperture (NA) of 0.65 and clear aperture of 1.1mm was designed, fabricated, and tested for the proposed blue-light small-form-factor optical pickup head system. It adopted the finite optical conjugation and could be produced by using the glass molding technique. The experimental results verify the optical performance near the diffraction-limited focus spot for the applications of high-density portable optical storage systems. (C) 2008 Optical Society of America.
Modal properties and thermal behaviors of high quality factor quasi-photonic crystal microcavity with different central post sizes
(2008-08-18)
Lu, Tsan-Wen
;
Lee, Po-Tsung
;
Tseng, Chung-Chuan
;
Tsai, Yi-Yu
;
光電工程學系
We investigate the variations of modal properties of 12-fold quasiphotonic crystal microcavities sustaining whispering-gallery (WG) mode with different central post sizes both in simulations and experiments. We realize our design by a series of dry- and wet-etching processes. WG mode lasing actions are obtained with high quality (Q) factor of 8,400 from microcavity with effective post size 420 nm in diameter. Loss and thermal behaviors are analyzed by measured Q factors, thresholds, and rolling-off effects from light-in light-out curves of microcavities with increased post size. By finite-element simulations, we also address the heat sink improvement due to presence of larger central post that is observed in measurements.
交大e-News第031期
(2008-08-20)
Secretariat
;
國立交通大學秘書室
Dynamical sequentially-controlled low-power multiplexer device
(2008-08-21)
Huang, Juinn-Dar
;
Chen, Chia-I
Multiplexers are basic components widely used in VLSI designs. Switching activities of a multiplexer are one of the most important factors of power consumption. A multiplexer may have some sub-multiplexers. An extra dynamic controller is applied in the present invention to reconfigure control signals for decreasing switching activities of the composed sub-multiplexers. Thus, the power consumption of the multiplexer is reduced to achieve higher power efficiency.
阻擋銅擴散之障礙層複合材料
(2008-08-21)
崔秉鉞
;
黃誌鋒
;
李佳蓉
本發明關於銅擴散障礙層複合材料或具有該材料之裝置,係由Ta與Pt所組成,Pt之摻雜量約在35原子數(at.)%以下,且於500℃以上之高溫下,該材料仍可維持非結晶之特性而可阻擋銅原子擴散並具有與Ta等同低之電阻係數。本發明之製法,包括TaPt合金材料之選取步驟,及進行該障礙層之沉積步驟,使該合金材料於一蒸鍍系統中,形成於Cu導電層與預定之隔離物之間,該預定之隔離物,可為一矽基板,或半導體裝置之閘極,或多重導線之電極等裝置其中之一。
Method and apparatus for switching data in communication system
(2008-08-21)
Lee, Chen-Yi
;
Lu, Jr-Hau
;
Lin, Chien-Ching
;
Chang, Hsie-Chia
;
Hsu, Yar-Sun
A method and apparatus for switching data in communication system which comprises of mainly a conversion circuit to receive the source data possessing in a real coding dimension and covert it to converted the data possessing in a tolerable coding dimension; the judgment bits are set in the converted data to designate the data as source data or not. Later on, shifter circuit is used to shift the converted data in certain amount and generates a shifted data; meanwhile, the right side and left side of shifted data are used to start acquiring the real coding dimension to be used respectively as a first data and a second data. Finally, a comparison and selection circuit is used to compare the corresponding judgment bits in the first and the second data and to output an output data, wherein output data is source data with the above-mentioned amount of shift.
水中溶解矽酸的移除
(2008-08-21)
黃志彬
;
林欣慧
本發明係關於一種利用鋁或鐵之氫氧化物在水中溶解態與固態的交替改變(以下簡稱相變),以移除水中溶解矽酸之方法。主要以鋁或鐵之水合固態相(即Al(OH)3或Fe(OH)3,以下簡稱膠羽),在pH偏鹼之吸附反應槽對進流之矽酸進行吸附,經過固液分離裝置後,將高濃度之膠羽懸浮液濃縮迴流至反應槽,但迴流至反應槽前需經pH調整槽將懸浮液之pH再調整至極酸性或極鹼性範圍,以令膠羽溶解。本發明可同時移除水中溶解矽酸及非溶解性二氧化矽。進流原水即便含有數十ppm的高濃度溶解矽酸,亦可降至一滿意程度(例如:0.5-5.0 ppm)甚至更低(視系統吸附劑總濃度而定),且系統中之膠羽可不斷循環使用。
閘極介電結構及其在有機薄膜電晶體之應用
(2008-08-21)
陳方中
;
莊喬舜
;
林永昇
一種閘極介電結構及其在有機薄膜電晶體之應用,乃將有機無機複合層與有機絕緣層構成閘極介電結構,並可將此閘極介電結構應用在有機薄膜電晶體等電子元件,由於閘極介電結構之有機無機複合層是以有機絕緣材料為基底並摻有經表面修飾之無機微粒子,可達到高介電,並藉由有機絕緣層對於有機無機複合層表面之修飾,不但可以抑制漏電流,還可幫助元件形成規則晶格排列的有機半導體層,以提昇元件的載子遷移率,因此,元件的輸出電流可以提高,且元件的效能也被大幅增進。
Method and apparatus for switching data in communication system
(2008-08-21)
Lee, Chen-Yi
;
Liu, Chih-Hao
;
Lin, Chien-Ching
;
Chang, Hsie-Chia
;
Hsu, Yar-Sun
A method and apparatus for switching data in communication system which comprises of mainly a conversion circuit to receive source data possessing real coding dimension and covert it to converted data possessing tolerable coding dimension; judgment bit is set in the converted data to designate the data as source data or not. Later on, shift circuit is used to shift the converted data in certain amount so as to generate a shifted data; meanwhile, the lowest bit and highest bit of shifted data are used to start acquiring real coding dimension to be used respectively as a first data and a second data, or by changing the pattern of acquiring the first data, then the highest bit minus the real coding dimension bit as the starting bit of the first data, and acquiring the real coding dimension from the side of the lowest bit. Finally, a comparison and selection circuit is used to compare the corresponding judgment bit in the first and the second data and to output an output data, wherein output data is source data with the above-mentioned amount of shift.
Protein structure search and local structure characterization
(2008-08-22)
Ku, Shih-Yen
;
Hu, Yuh-Jyh
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分子醫學與生物工程研究所
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資訊工程學系
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Institute of Molecular Medicine and Bioengineering
Background: Structural similarities among proteins can provide valuable insight into their functional mechanisms and relationships. As the number of available three-dimensional (3D) protein structures increases, a greater variety of studies can be conducted with increasing efficiency, among which is the design of protein structural alphabets. Structural alphabets allow us to characterize local structures of proteins and describe the global folding structure of a protein using a one-dimensional (1D) sequence. Thus, 1D sequences can be used to identify structural similarities among proteins using standard sequence alignment tools such as BLAST or FASTA. Results: We used self-organizing maps in combination with a minimum spanning tree algorithm to determine the optimum size of a structural alphabet and applied the k-means algorithm to group protein fragnts into clusters. The centroids of these clusters defined the structural alphabet. We also developed a flexible matrix training system to build a substitution matrix (TRISUM-169) for our alphabet. Based on FASTA and using TRISUM-169 as the substitution matrix, we developed the SA-FAST alignment tool. We compared the performance of SA-FAST with that of various search tools in database-scale search tasks and found that SA-FAST was highly competitive in all tests conducted. Further, we evaluated the performance of our structural alphabet in recognizing specific structural domains of EGF and EGF-like proteins. Our method successfully recovered more EGF sub-domains using our structural alphabet than when using other structural alphabets. SA-FAST can be found at http://140.113.166.178/safast/. Conclusion: The goal of this project was two-fold. First, we wanted to introduce a modular design pipeline to those who have been working with structural alphabets. Secondly, we wanted to open the door to researchers who have done substantial work in biological sequences but have yet to enter the field of protein structure research. Our experiments showed that by transforming the structural representations from 3D to 1D, several 1D-based tools can be applied to structural analysis, including similarity searches and structural motif finding.