Browsing by Issue Date, starting with "2013-06-01"

Now showing 1 - 20 of 31581

Multicomponent Solvent-Free Synthesis Of Benzimidazolyl Imidazo[1,2-a]-pyridine Under Microwave Irradiation
(2013-06-01)
Maiti, Barnali
;
Chanda, Kaushik
;
Selvaraju, Manikandan
;
Tseng, Chih-Chung
;
Sun, Chung-Ming
A novel one-pot, three-component reaction employing variously substituted benzimidazole-linked amino pyridines, aldehydes, and isonitriles catalyzed by scandium(III) triflate under solvent-free conditions were accomplished. This new synthetic methodology facilitates the rapid generation of intricate molecular frameworks in three-dimensional fashion leading to benzinaidazole-imidazo [1,2-a] pyridines. This approach is envisioned as an environmentally benign process and a simple operation to the biological interesting compounds. The present synthetic sequence permits the introduction of three points of structural diversity to expand chemical space with high purity and excellent yields.
Self-Organized Formation and Evolution of Peer-to-Peer Networks
(2013-06-01)
Li, Yung-Ming
;
Tan, Yong
;
De, Prabuddha
;
資訊管理與財務金融系註：原資管所+財金所
;
Department of Information Management and Finance
Peer-to-peer (P2P) networks are social networks for pooling network and information resources and are considered superior conduits for distributed computing and data management. In this paper, we utilize the theories of social networks and economic incentives to investigate the formation of P2P networks with rational participating agents (active peers). The paper proposes a framework for multilevel formation dynamics, including an individual level (content-sharing decision and group selection) and a group level (membership admission, splitting, and interconnection). It is found that if the network size (the number of peer nodes) is sufficiently large, the stable (self-selected equilibrium) free-riding ratio could be nonzero, contrary to the common belief that everybody should free ride. The efficient (welfare-maximizing) free-riding ratio is not necessarily zero; that is, a certain degree of free riding is beneficial and should be tolerated. The sharing level in a network increases (decreases) with the download (upload) capacities of its peer nodes. In addition, the heterogeneity of content availability and upload capacity discourages sharing activities. Although the sharing level of a stable group is typically lower than that of an efficient group, the self-formed network may have a larger or smaller group size than what is efficient, depending on the structure of the group admission decision process. It is also observed that self-organized interconnections among groups lead to network inefficiency because the network may be over- or underlinked. To recover the efficiency loss during the formation process, we propose internal transfer mechanisms to force stable networks to become efficient.
Effect of oscillatory EHD on the heat transfer performance of a flat plate
(2013-06-01)
Sheu, Wen-Junn
;
Hsiao, Jen-Jei
;
Wang, Chi-Chuan
;
機械工程學系
;
Department of Mechanical Engineering
The present study investigates the effect of oscillatory EHD on the heat transfer performance of a flat plate. A needle type electrode with positive polarity is used to generate ionic wind with applied voltage ranging from 4 to 9.5 kV. The wave forms of the input voltage are either steady or stepped and the frequency ranges from 0.5 to 2 Hz with the separation distance between the electrode and the test plate being 5 and 15 mm, respectively. It is found that at the same applied voltage, the heat transfer performance subject to the oscillatory EHD is always inferior to that of the steady EHD for all frequencies. A parabolic dependence of the ionic current with the supplied voltage is seen under steady EHD operation. However, the ionic current vs. supplied voltage shows a rather linear dependence pertaining to the oscillatory EHD. For a smaller separation distance of 5 mm, the heat transfer performance for f = 0.5 Hz is slightly higher than that of f = 2 Hz. However, the trend is reversed when the separation distance is increased to 15 mm. (C) 2013 Elsevier Ltd. All rights reserved.
Derivation of extended Maxwell Garnett formula for carbon-nanotube-doped nematic liquid crystal
(2013-06-01)
Fuh, Andy Ying-Guey
;
Lee, Wei
;
Huang, Kevin Yu-Chia
;
光電學院
;
College of Photonics
A numerical effort for modelling the dielectric behaviour of the novel binary mixture of nematic liquid crystal and carbon nanotube (NLC:CNT) has been carried out using the Maxwell Garnett theory. The CNTs are treated as conductive anisotropic inclusions while the NLCs as dielectric isotropic or anisotropic matrix depending on temperature. Thus, the numerical expressions for the dielectric anisotropy for the scenarios of aligned CNTs in the NLC matrix of either nematic or isotropic phases have been derived, and the results show that the Debye parameter of CNT at optic limit seems to be the decisive factor in the enhancement of the dielectric anisotropy of the nematic system.
基於使用者回饋資訊之電器偵測方法與系統
(2013-06-01)
曹孝櫟
;
賴易聖
一種基於使用者回饋資訊之電器偵測方法與系統，特別是指一種基於使用者回饋資訊與共同決策搜尋演算法之非侵入式負載偵測方法與系統；包含透過電器的各種負載特徵值，藉使用者輸入或確認電器搜尋結果，產生電器與各種電器耗電特徵值之對應關係，並將回饋資訊記載在智慧型電錶或雲端系統中，再透過數學的分析而計算電器任一特徵值出現的比率，以及各特徵值之鑑別率，隨後透過共同決策方法，自動判別各種電器種類，據以分析出家中電器的使用情形。
智慧型行車紀錄與檢視系統
(2013-06-01)
吳炳飛
;
陳昭榮
;
陳盈翰
;
葉仲軒
一種智慧型行車紀錄與檢視系統係用於紀錄車輛的行車過程並且供使用者可進行智慧地檢視該行車過程。其中,該系統係透過擷取單元擷取該行車過程中的影像訊號,並且再透過感測單元同時地紀錄該行車過程中所遭遇的各種事件(例如車道偏移、前車偵測、重力感測與內部車輛資訊),而再透過處理單元將該等事件與該影像訊號做相關的連結,並儲存至記憶單元中,用於提供使用者可藉由檢視單元自該記憶單元檢視所儲存具有該等事件的該影像訊號。故本發明係可藉由智慧型的記錄系統,用以分析該等事件與該影像訊號彼此之間的相關連性。
Plasmonic Coupler for Silicon-Based Micro-Slabs to Plasominc Nano-Gap Waveguide Mode Coversion Enhancement
(2013-06-01)
Liu, Y.
;
Lai, Y.
;
Chang, K.
;
光電工程學系
;
Department of Photonics
We investigate a short (similar to 1.5 mu m) "partially" corrugated tapered waveguide for silicon-based micro-slab waveguide to plasmonic nano-gap waveguide mode conversion at the optical communication frequency. The structure is designed to achieve more precise mode matching between the silicon slabs and plasmonic waveguides. High transmission efficiencies up to 87% similar to 98% have been demonstrated numerically. The results show that the corrugated structure should not only be helpful for realizing full on-chip silicon plasmonic devices but also a good choice for mode coupling enhancement from dielectric waveguides to plasmonic waveguides. Meanwhile, we point out that the coupling mechanism reported here is different from that achieved by exciting surface plasmon polaritions (SPPs) at metal surfaces reported in the literature [18], [19].
Slab Thickness Dependence of Localized Surface Plasmon Resonance Behavior in Gold Nanorings
(2013-06-01)
Tsai, Chia-Yang
;
Wu, Che-Yao
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Chang, Kai-Hau
;
Lee, Po-Tsung
;
光電工程學系
We present detailed experimental and numerical studies of plasmonic properties of gold nanoring (NR) arrays with different slab thicknesses from 15 to 125 nm. The hybrid plasmon resonances for the bonding and antibonding modes in gold NRs exhibit a high slab thickness dependence behavior in optical properties. For the thinner slab thickness below 50 nm, both hybrid modes show large spectral tunabilities by varying the slab thickness. Furthermore, for such hollow NR structure, the enhancements of electric field intensities at the inner and outer ring surfaces when reducing the slab thickness are investigated. We observe a significant transition of field distributions for the antibonding mode. All these features can be understood by surface charge distributions from our simulations. The results of this study offer a potential strategy to design a composite plasmonic nanostructure with large field enhancement for numerous applications.
Complete mitochondrial genome of the Chinese rasbora Rasbora steineri (Teleostei, Cyprinidae)
(2013-06-01)
Chang, Chia-Hao
;
Tsai, Chi-Li
;
Jang-Liaw, Nian-Hong
;
生物科技學系
;
Department of Biological Science and Technology
We describe the complete mitochondrial genome sequence of the Chinese rasbora, Rasbora steineri, which is a small cyprinid distributed in southeastern Asia. The circle genome (16,530 bp) consists of 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes and 1 control region. It has the typical vertebrate mitochondrial gene arrangement.
DNA sequencing using electrical conductance measurements of a DNA polymerase (Retracted article. See vol. 10, pg. 563, 2015)
(2013-06-01)
Chen, Yu-Shiun
;
Lee, Chia-Hui
;
Hung, Meng-Yen
;
Pan, Hsu-An
;
Chiou, Jin-Chern
The development of personalized medicine-in which medical treatment is customized to an individual on the basis of genetic information-requires techniques that can sequence DNA quickly and cheaply. Single-molecule sequencing technologies, such as nanopores, can potentially be used to sequence long strands of DNA without labels or amplification, but a viable technique has yet to be established. Here, we show that single DNA molecules can be sequenced by monitoring the electrical conductance of a phi29 DNA polymerase as it incorporates unlabelled nucleotides into a template strand of DNA. The conductance of the polymerase is measured by attaching it to a protein transistor that consists of an antibody molecule (immunoglobulin G) bound to two gold nanoparticles, which are in turn connected to source and drain electrodes. The electrical conductance of the DNA polymerase exhibits well-separated plateaux that are similar to 3 pA in height. Each plateau corresponds to an individual base and is formed at a rate of similar to 22 nucleotides per second. Additional spikes appear on top of the plateaux and can be used to discriminate between the four different nucleotides. We also show that the sequencing platform works with a variety of DNA polymerases and can sequence difficult templates such as homopolymers.
Partial nitrification and anammox process: A method for high strength optoelectronic industrial wastewater treatment
(2013-06-01)
Daverey, Achlesh
;
Su, Sin-Han
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Huang, Yu-Tzu
;
Chen, Shiou-Shiou
;
Sung, Shihwu
Completely autotrophic nitrogen removal over nitrite (CANON) process was employed in an 18 L sequencing batch reactor (SBR) for treatment of optoelectronic industrial wastewater containing high strength ammonium nitrogen (3712 +/- 120 mg NH4+ - N L-1). About 89% of total nitrogen and 98% of NH4+ - N removal efficiencies were observed at the loading rate of 909 g N m(-3) d(-1) and the HRT of 4 d. A profound variation in the performance of CANON process was experienced at high DO exposure (above 1 mg L-1) and high nitrite concentration (above 100 mg L-1). Inhibition due to high DO exposure was found to be reversible phenomenon whereas the synergistic inhibition of nitrite, free ammonia and free nitrous acid was irreversible. The fluctuation of reactor temperature between 17 and 37 degrees C did not affect the performance of CANON system. The CANON process was stably controlled at high nitrogen loading rate for more than one month. The co-existence of aerobic and anaerobic ammonium oxidizing bacteria in the reactor was detected by The PCR analysis. About 5 fold increase in amount of anammox bacteria over a period of 258 days was confirmed from the results of qPCR on day 487. (C) 2013 Elsevier Ltd. All rights reserved.
Epitaxial NiO nanocrystals: a dimensional analysis
(2013-06-01)
Cheung, Jeffrey
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Okatan, Mahmut Baris
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Sullaphen, Jivika
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Cheng, Xuan
;
Nagarajan, Valanoor
We present the study of the synthesis of (001) nickel oxide (NiO) epitaxial nanocrystals grown on (001) strontium titanate (SrTiO3) single crystal substrates. Pulsed laser deposition of the bismuth nickel oxide (BiNiO3, BNO) perovskite precursor followed by post-deposition processing is carried out to form the NiO nanocrystals. A detailed analysis of the dimensions of nanocrystals reveals that the morphology attained differs from the thermodynamically expected equilibrium shape. The deviations from the equilibrium shape are found to follow a systematic trend where the in-plane basal dimensions, that is, the length and width of the nanocrystals grown differ in discretized dimensions. This discretization suggests that for a given interfacial area of nanocrystals there are multiple stable basal rectangular geometries attainable.
Spatially Efficient Design of Annotated Metro Maps
(2013-06-01)
Wu, Hsiang-Yun
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Takahashi, Shigeo
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Hirono, Daichi
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Arikawa, Masatoshi
;
Lin, Chun-Cheng
Annotating metro maps with thumbnail photographs is a commonly used technique for guiding travelers. However, conventional methods usually suffer from small labeling space around the metro stations especially when they are interchange stations served by two or more metro lines. This paper presents an approach for aesthetically designing schematic metro maps while ensuring effective placement of large annotation labels that are sufficiently close to their corresponding stations. Our idea is to distribute such labels in a well-balanced manner to labeling regions around the metro network first and then adjust the lengths of metro line and leader line segments, which allows us to fully maximize the space coverage of the entire annotated map. This is accomplished by incorporating additional constraints into the conventional mixed-integer programming formulation, while we devised a three-step algorithm for accelerating the overall optimization process. We include several design examples to demonstrate the spatial efficiency of the map layout generated using the proposed approach through minimal user intervention.
Generating Pointillism Paintings Based on Seurat's Color Composition
(2013-06-01)
Wu, Yi-Chian
;
Tsai, Yu-Ting
;
Lin, Wen-Chieh
;
Li, Wen-Hsin
;
資訊工程學系
This paper presents a novel example-based stippling technique that employs a simple and intuitive concept to convert a color image into a pointillism painting. Our method relies on analyzing and imitating the color distributions of Seurat's paintings to obtain a statistical color model. Then, this model can be easily combined with the modified multi-class blue noise sampling to stylize an input image with characteristics of color composition in Seurat's paintings. The blue noise property of the output image also ensures that the color points are randomly located but remain spatially uniform. In our experiments, the multivariate goodness-of-fit tests were adopted to quantitatively analyze the results of the proposed and previous methods, further confirming that the color composition of our results are more similar to Seurat's painting style than that of previous approaches. Additionally, we also conducted a user study participated by artists to qualitatively evaluate the synthesized images of the proposed method.
餵球在羽球運動訓練應用上之探討
(國立交通大學體育室, 2013-06-01)
鄭健民
;
連惟昱
;
紀世清
;
Chien-Ming Cheng
;
Wei-Yuh Lian
本文研究的目的是探討餵球在羽球運動訓練上的應用，從紀世清（2002）結論指出羽球運動技術內容分類及因素要項可分為基本運動技術、應用運動技術、比賽運動技術。這些技術可從餵球訓練上分成初級、中級、高級及模擬比賽等方式餵球訓練。本文經過本人實際訓練、歸納與探討分析後，獲致以下結果：一、餵球訓練時必須考慮選手的水準（如初級、中級、高級）。二、餵球訓練時必須注意餵球時間、方向、距離、角度及餵球者位置。三、餵球訓練可訓練單打選手及雙打選手基本動作及球路變化。四、根據餵球的意義、功能（程度）及方式等，高水準選手餵球訓練大致可分前半場（攻擊及防守）、後半場（攻擊及防守）及全場餵球訓練。本研究的結論，餵球訓練是一種有效的訓練方法，但究竟與實際比賽的情形是有所差異，因此，實施餵球訓練後可搭配實際練習。
Structure-preserving Arnoldi-type algorithm for solving eigenvalue problems in leaky surface wave propagation
(2013-06-01)
Huang, Tsung-Ming
;
Lin, Wen-Wei
;
Wu, Chin-Tien
;
應用數學系
;
Department of Applied Mathematics
We study the generalized eigenvalue problems (GEPs) that arise from modeling leaky surface wave propagation in an acoustic resonator with an infinite amount of periodically arranged interdigital transducers. The constitutive equations are discretized by finite element methods with mesh refinements along the electrode interfaces and corners. The non-zero eigenvalues of the resulting GEP appear in reciprocal pairs (lambda, 1/lambda). We transform the GEP into a T-palindromic quadratic eigenvalue problem (TPQEP) to reveal the important reciprocal relationships of the eigenvalues. The TPQEP is then solved by a structure-preserving algorithm incorporating a generalized T-skew-Hamiltonian implicitly restarted Arnoldi method so that the reciprocal relationship of the eigenvalues may be automatically preserved. Compared with applying the Arnoldi method to solve the GEPs, our numerical results show that the eigenpairs produced by the proposed structure-preserving method not only preserve the reciprocal property but also possess high efficiency and accuracy. (C) 2013 Elsevier Inc. All rights reserved.
一種適地性服務系統及方法
(2013-06-01)
陳昱嘉
;
王蒞君
一種適地性服務系統及方法,係令與通訊裝置及雲端數據伺服器連結的適地性服務伺服器分別於註冊模式及服務模式中利用不易被修改或偽造之通訊裝置之國際移動用戶識別碼(international mobile subscriber identity)進行註冊驗證流程及服務驗證流程,俾供使用者透過通訊裝置獲得特定之適地性服務結果,而此分散式驗證技術不但能有效降低資料被竊取之風險,亦能提高服務取得之彈性與便利性。
Device and Circuit Performance Estimation of Junctionless Bulk FinFETs
(2013-06-01)
Han, Ming-Hung
;
Chang, Chun-Yen
;
Chen, Hung-Bin
;
Cheng, Ya-Chi
;
Wu, Yung-Chun
The design and characteristics of junctionless (JL) bulk FinFET devices and circuits are compared with the conventional inversion-mode (IM) bulk FinFET using 3-D quantum transport device simulation. The JL bulk FinFET shows better short channel characteristics, including drain-induced barrier lowering, subthreshold slope, and threshold voltage (V-th) roll-off characteristics at supply voltage (V-DD) 1 V. Analyses of electron density and electric field distributions in ON-state and OFF-state also show that the JL devices have better ON-OFF current ratios. Regarding design aspects, the effects of channel doping concentration (N-ch) and Fin height (H)/width (W) on device V-th are also compared. In addition, the V-th of the proposed JL bulk FinFET can be easily tuned by an additional parameter, substrate doping concentration (N-sub). Inverter performance and static random access memory (SRAM) circuit performance are also compared using a coupled device-circuit simulation. The high-to-low delay time (t(HL)) and low-to-high delay time (t(LH)) of the inverter with JL bulk FinFET are smaller than the inverter with IM bulk FinFET. The JL bulk FinFET SRAM cell also provides a similar static transfer characteristic to those of IM bulk FinFET SRAM cell, which show large potential in digital circuit application.
Design of photonic directional couplers as phase selectors
(2013-06-01)
Lee, Po-Yi
;
Huang, Chih-Hsien
;
Hsieh, Wen-Feng
;
光電工程學系
;
Department of Photonics
A phase selector is designed by relatively sliding two coupled identical photonic crystal waveguides (PCWs) of a photonic directional coupler (DC). By solving the coupled equations analytically derived from the tight-binding theory, symmetry breaking in the crossing of dispersion curves can be observed as countersliding two degenerated waveguides along the propagation direction. There exists a different phase shift between two eigenmodes by varying the sliding distance and the operating frequency. Numerical simulations of DCs made of photonic crystal slabs were used to verify the correctness of our theoretical predictions and to discuss thoroughly the underlying physics of the symmetry-breaking system. The design concept is provided for a phase selector or a beam splitter whose output phase difference can be controlled by the sliding distance of two PCWs. (C) 2013 Optical Society of America
A multi-agent collaborative maintenance platform applying game theory negotiation strategies
(2013-06-01)
Trappey, Amy J. C.
;
Trappey, Charles V.
;
Ni, Wei-Chun
;
管理科學系
;
Department of Management Science
Engineering asset management (EAM) is a broad discipline with distributed functions and services. When engineering assets are capital intensive, management requires specialized expertise for diagnosis, prognosis, maintenance and repairs. The current practice of EAM relies on self maintained experiential rules with coordinated collaboration and outsourcing for maintenance and repairs. In order to enhance the life long asset value and efficiency (from the stakeholder's viewpoint) and after sales service quality (from the asset provider's viewpoint), this research proposes a collaborative maintenance platform that integrates real time data collection with diagnostic and prognostic expertise. The collaborative system combines and delivers services among asset operation sites (the maintenance demanders), the service center (the intermediary coordinator), the system providers, the first tier maintenance collaborators, and the second and lower tier parts suppliers. Multi-agent system technology is used to integrate different systems and databases. Agents with autonomy and authority work to assist service providers and coordinate communications, negotiations, and maintenance decision support. Finally, game theory is used to design the decision models for strategic, tactical, and operational decision making during collaborative maintenance practices.