Browsing by Issue Date, starting with "2013-06-19"

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Single-crystalline delta-Ni2Si nanowires with excellent physical properties
(2013-06-19)
Chiu, Wen-Li
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Chiu, Chung-Hua
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Chen, Jui-Yuan
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Huang, Chun-Wei
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Huang, Yu-Ting
In this article, we report the synthesis of single-crystalline nickel silicide nanowires (NWs) via chemical vapor deposition method using NiCl2 center dot 6H(2)O as a single-source precursor. Various morphologies of delta-Ni2Si NWs were successfully acquired by controlling the growth conditions. The growth mechanism of the delta-Ni2Si NWs was thoroughly discussed and identified with microscopy studies. Field emission measurements show a low turn-on field (4.12 V/mu m), and magnetic property measurements show a classic ferromagnetic characteristic, which demonstrates promising potential applications for field emitters, magnetic storage, and biological cell separation.
METHOD FOR VISUALIZING A COMPLICATED METRO MAP IN A LIMITED DISPLAYING AREA
(2013-06-20)
WANG YU-SHUEN
;
CHI MING-TE
The prevented invention provides a method to visualize complicated metro maps in a limited displaying area, in which the route to the passenger's destination is highlighted. In order to achieve high readability, it sets 1) the distance between neighboring stations to be equal, 2) the transportation lines to lie in octilinear directions, 3) the angles of incident edges at each station to be maximized, and 4) the station positions to be inside the displaying area. It also labels the names of stations that passenger will pass by to make the route navigation easy and intuitive.
IMAGE PROCESSING UNIT FOR OPTICAL TOMOGRAPHY
(2013-06-20)
Fang Wai-Chi
;
Chen Tien-Ho
;
Kang Shih
;
Wu Shih-Yang
;
Cheng Ching-Ju
An image processing unit for optical tomography is applicable in miniaturized diffusion optical tomography devices. It includes an image reconstructor and an image post-processor. The image reconstructor receives a plurality of optical signals generated from an reaction of an object under test with irradiating light and an inverse solution matrix of an image model of the object, and obtains scalar product on each of the optical signals and the inverse solution matrix through a sub-frame algorithm to generate an original image corresponding to the object. Then, the image post-processor performs a Gaussian extended algorithm on the original image to output a final image. With the image reconstruction and image post-processing of the present invention, slowing down of computation speed due to miniaturization of the conventional optical tomography techniques can be avoided, while providing good quality in the output image.
ALPHA-SELECTIVE GLYCOSYLATION METHOD
(2013-06-20)
Mong Kwok-Kong Tony
;
Chao Chin-Sheng
;
Lu Shao-Ru
;
Liu Chih-Yueh
The present invention provides an α-selective glycosylation method. The α-selective glycosylation method includes performing a reaction of a donor having a saccharide structure and a formamide-containing compound to form a glycosyl imidate compound; and in one pot environment, performing an addition reaction of the glycosyl imidate compound and an acceptor having a hydroxyl group to form an α-glycoside with high α-selectivity. The α-selective glycosylation method is applicable to the large scale production and easy to recover the formamide-containing compound.
SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF
(2013-06-20)
Chang Edward Yi.
;
Lin Yueh-Chin
;
Chang Chia-Hua
;
Trinh Hai-Dang
The present invention relates to a semiconductor device and a manufacturing method thereof. The semiconductor device includes: a III-V semiconductor layer; an aluminum oxide layer formed on the III-V semiconductor layer; and a lanthanide oxide layer formed on the aluminum oxide layer. The method of manufacturing a semiconductor device includes: forming an aluminum oxide layer between a III-V semiconductor layer and a lanthanide oxide layer so as to prevent an inter-reaction of atoms between the III-V semiconductor layer and the lanthanide oxide layer.
Three-pulse multiplex coherent anti-Stokes/Stokes Raman scattering (CARS/CSRS) microspectroscopy using a white-light laser source
(2013-06-20)
Bito, Kotatsu
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Okuno, Masanari
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Kano, Hideaki
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Leproux, Philippe
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Couderc, Vincent
We have developed a three-pulse non-degenerate multiplex coherent Raman microspectroscopic system using a white-light laser source. The fundamental output (1064 nm) of a Nd: YAG laser is used for the pump radiation with the white-light laser output (1100-1700 nm) for the Stokes radiation to achieve broadband multiplex excitations of vibrational coherences. The second harmonic (532 nm) of the same Nd: YAG laser is used for the probe radiation. Thanks to the large wavelength difference between the pump and probe radiations, coherent anti-Stokes Raman scattering (CARS) and coherent Stokes Raman scattering (CSRS) can be detected simultaneously. Simultaneous detection of CARS and CSRS enables us to obtain information on the electronic resonance effect that affects differently the CARS and CSRS signals. Simultaneous analysis of the CARS and CSRS signals provides us the imaginary part of chi((3)) without introducing any arbitrary parameter in the maximum entropy method (MEM). (C) 2013 Elsevier B. V. All rights reserved.
交大e-News第143期
(2013-06-20)
Secretariat
;
國立交通大學秘書室
INSTANT DYNAMIC STRATEGY SYSTEM AND METHOD
(2013-06-20)
Huang Ching-Yao
;
Cheng Shih-Heng
;
Chou Wei
;
Hsieh Meng-Tieh
An instant dynamic strategy method is provided for dynamically providing a strategy according to external sensed information. The method includes receiving external sensed information; analyzing the sensed information so as to generate target data and conditional data according to user requirements; and transmitting the target data and the conditional data to an external dynamic strategy module such that the dynamic strategy module collects and analyzes strategic data according to the target data and the conditional data so as to generate a strategy. Compared with prior art that provides strategies based on fixed databases and fixed strategic rules, the present invention takes into account external information so as to achieve a desired strategic effect.
CONTROL AND SENSING SYSTEM FOR DIFFUSION OPTICAL TOMOGRAPHY AND METHOD FOR OPERATING THE SAME
(2013-06-20)
Fang Wai-Chi
;
Chen Tien-Ho
;
Kang Shih
;
Wu Shih-Yang
;
Cheng Ching-Ju
A control and sensing system for diffusion optical tomography and a method for operating the same are disclosed. The control and sensing system includes a control unit and a sensing circuit with a plurality of light sources and sensors, each light source being surrounded by a corresponding predetermined number of the sensors. The control unit instructs the light sources to individually emit light to an object, so the object generates a plurality of optical signals, and instructs the predetermined number of the sensors corresponding to each light source to receive the optical signals and transmit them to the control unit, thereby reducing the complexity of the control and sensing system.
DEVICE AND METHOD FOR DIFFUSION OPTICAL TOMOGRAPHY
(2013-06-20)
FANG Wai-Chi
;
CHEN Tien-Ho
;
KANG Shih
;
WU Shih-Yang
;
CHENG Ching-Ju
A device and method for diffusion optical tomography are disclosed. The device includes a sensing circuit with a plurality of light sources and sensors and an optical tomography element having a control unit, a computation unit and an image reconstruction unit. First, the computation unit constructs an image model of an object using optical parameters of the object, and performs decomposition on the image model. Then, the control unit instructs the light sources to emit light to the object, and receives a plurality of optical signals generated by the object in response to the light. Finally, the image reconstruction unit combines the optical signals and the decomposed image model and reconstructs an image of the object based on the combination of the optical signals and the decomposed image model.
INTERACTIVE SYSTEM AND INTERACTIVE DEVICE THEREOF
(2013-06-20)
Tseng Yu-Chee
;
Wu Chun-Hao
An interactive system includes a display device and an interactive device. The display device includes a display module for displaying an image thereon, a S processor module and a transceiver. The interactive device includes an image capturing unit, a control unit, and a signal transceiving unit configured to communicate with the transceiver. The image capturing unit is operable to capture at least a part of the image displayed on the display module. The control unit is operable to transmit information of the captured part of the image to the transceiver via the signal transceiving unit. The processor module is operable to determine location of the interactive device relative to the image displayed on the display module based on the information of the part of the image received by the transceiver.
SELF-RESET TRANSIENT-TO-DIGITAL CONVERTOR AND ELECTRONIC PRODUCT UTILIZING THE SAME
(2013-06-20)
KER MING-DOU
;
Yen Cheng-Cheng
;
CHEN Tung-Yang
;
Tsai Ching-Ling
;
Chen Shih-Fan
A self-reset transient-to-digital convertor which includes at least one transient detection circuit is disclosed. The transient detection circuit, coupled between a first power line and a second power line, includes at least one voltage drop unit, a current amplifier unit, and a time control unit. When an ESD event occurs, the voltage drop unit is conducted to pass through an ESD current. The current amplifier unit, coupled between the voltage drop unit and the first power line, is conducted by the ESD current to set the level of a first node. The time control unit, coupled between the first node and the second power line, is configured to gradually drain the ESD current away. Wherein, each of the transient detection circuit generates a digital code according to the level of the first node.
Infrared Spectra of Protonated Pyrene and Its Neutral Counterpart in Solid para-Hydrogen
(2013-06-20)
Bahou, Mohammed
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Wu, Yu-Jong
;
Lee, Yuan-Pern
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應用化學系
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應用化學系分子科學碩博班
Protonated polycyclic aromatic hydrocarbons (H(+)PAHs) have been reported to have infrared (IR) bands at wavenumbers near those of unidentified infrared (UIR) emission bands from interstellar objects. We produced 1-C16H11+ and 1-C16H11 upon electron bombardment during matrix deposition of p-H-2 containing pyrene (C16H10) in a small proportion. Intensities of absorption features of 1-C16H11+ decreased after the matrix was maintained in darkness or irradiated with light at 365 nm, whereas those of 1-C16H11 increased. The observed line wavenumbers and relative intensities of 1-C16H11+ and 1-C16H11 agree satisfactorily with the scaled vibrational wavenumbers and IR intensities predicted with the B3PW91/6-311++G(2d,2p) method. Our method, being relatively clean with negligible fragmentation, is applicable to larger H(+)PAH; it has the advantages of producing excellent IR spectra covering a broad spectral range with narrow lines and accurate intensities, so that structural identification among various isomers is feasible.
空気媒質層を有する半導体光学装置の製造方法及び空気媒質層の形成方法（Ａｓｅｍｉｃｏｎｄｕｃｔｏｒｏｐｔｉｃａｌｄｅｖｉｃｅｈａｖｉｎｇａｉｒｍｅｄｉａｌａｙｅｒａｎｄｔｈｅｍｅｔｈｏｄｆｏｒｆｏｒｍｉｎｇｔｈｅａｉｒｍｅｄｉａｌａｙｅｒ）
(2013-06-20)
盧廷昌
;
黄▲キ▼閔
;
郭浩中
;
王興宗
【課題】半導体光学装置において良好な均一性を有する空気媒質層の製造方法を提供する。【解決手段】基板４０上に、ＧａＮ（窒化ガリウム）薄膜４２と、ＺｎＯ（酸化亜鉛）からなる犠牲層４４１と、窒素化合物を含む半導体層４６と、からなる積層膜を形成した後、酸性溶液に浸すことで一部の犠牲層を取り除き、ＧａＮ（窒化ガリウム）薄膜４２及び窒素化合物を含む半導体層４６の間に残留した犠牲層４４１とその周囲の空間に空気媒質層４４２を有する半導体光学素子４を形成する。【選択図】図５
Quantum-interference transport through surface layers of indium-doped ZnO nanowires
(2013-06-21)
Chiu, Shao-Pin
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Lu, Jia Grace
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Lin, Juhn-Jong
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電子物理學系
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物理研究所
We have fabricated indium-doped ZnO (IZO) nanowires (NWs) and carried out four-probe electrical-transport measurements on two individual NWs with geometric diameters of approximate to 70 and approximate to 90 nm in a wide temperature T interval of 1-70 K. The NWs reveal overall charge conduction behavior characteristic of disordered metals. In addition to the T dependence of resistance R, we have measured the magnetoresistance (MR) in magnetic fields applied either perpendicular or parallel to the NW axis. Our R(T) and MR data in different T intervals are consistent with the theoretical predictions of the one- (1D), two- (2D) or three-dimensional (3D) weak-localization (WL) and the electron-electron interaction (EEI) effects. In particular, a few dimensionality crossovers in the two effects are observed. These crossover phenomena are consistent with the model of a 'core-shell-like structure' in individual IZO NWs, where an outer shell of thickness t (similar or equal to 15-17 nm) is responsible for the quantum-interference transport. In the WL effect, as the electron dephasing length L-phi gradually decreases with increasing T from the lowest measurement temperatures, a 1D-to-2D dimensionality crossover takes place around a characteristic temperature where L-phi approximately equals d, an effective NW diameter which is slightly smaller than the geometric diameter. As T further increases, a 2D-to-3D dimensionality crossover occurs around another characteristic temperature where L-phi approximately equals t (
應用於晶片封裝與電路板共同設計之晶片接腳指定設計方法及其程式產品
(2013-06-21)
李仁傑
;
陳宏明
一種應用於晶片封裝與電路板共同設計之晶片接腳指定設計方法，其步驟包含接受設定接腳規格與需求、產生複數個接腳圖塊、接腳模塊的建構與群組化及接腳模塊的平面位置配置；其中，依據規格與需求產生各接腳圖塊，而接腳模塊與電路板的組件之配置位置對應，並且每一接腳模塊包含一種接腳圖塊以及一電源接腳模塊，各接腳模塊繞設於該晶片之四個邊，並透過群組化及平面位置再配置之過程，進行封裝面積的最佳化。
Specific heat capacity of molten salt-based alumina nanofluid
(2013-06-21)
Lu, Ming-Chang
;
Huang, Chien-Hsun
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機械工程學系
;
Department of Mechanical Engineering
There is no consensus on the effect of nanoparticle (NP) addition on the specific heat capacity (SHC) of fluids. In addition, the predictions from the existing model have a large discrepancy from the measured SHCs in nanofluids. We show that the SHC of the molten salt-based alumina nanofluid decreases with reducing particle size and increasing particle concentration. The NP size-dependent SHC is resulted from an augmentation of the nanolayer effect as particle size reduces. A model considering the nanolayer effect which supports the experimental results was proposed.
Homogeneous anisotropic solutions of topologically massive gravity with a cosmological constant and their homogeneous deformations
(2013-06-21)
Moutsopoulos, George
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電子物理學系
;
Department of Electrophysics
We solve the equations of topologically massive gravity (TMG) with a potentially non-vanishing cosmological constant for homogeneous metrics without isotropy. We only reproduce known solutions. We also discuss their homogeneous deformations, possibly with isotropy. We show that de Sitter space and hyperbolic space cannot be infinitesimally homogeneously deformed in TMG. We clarify some of their Segre-Petrov types and discuss the warped de Sitter spacetime.
Nonequilibrium quantum transport through a dissipative resonant level
(2013-06-21)
Chung, Chung-Hou
;
Le Hur, Karyn
;
Finkelstein, Gleb
;
Vojta, Matthias
;
Woelfle, Peter
The resonant-level model represents a paradigmatic quantum system which serves as a basis for many other quantum impurity models. We provide a comprehensive analysis of the nonequilibrium transport near a quantum phase transition in a spinless dissipative resonant-level model, extending earlier work [Phys. Rev. Lett 102, 216803 (2009)]. A detailed derivation of a rigorous mapping of our system onto an effective Kondo model is presented. A controlled energy-dependent renormalization-group approach is applied to compute the nonequilibrium current in the presence of a finite bias voltage V. In the linear-response regime V -> 0, the system exhibits as a function of the dissipative strength a localized-delocalized quantum transition of the Kosterlitz-Thouless (KT) type. We address fundamental issues of the nonequilibrium transport near the quantum phase transition: Does the bias voltage play the same role as temperature to smear out the transition? What is the scaling of the nonequilibrium conductance near the transition? At finite temperatures, we show that the conductance follows the equilibrium scaling for V < T, while it obeys a distinct nonequilibrium profile for V > T. We furthermore provide different signatures of the transition in the finite-frequency current noise and ac conductance via a recently developed functional renormalization group (FRG) approach. The generalization of our analysis to nonequilibrium transport through a resonant level coupled to two chiral Luttinger liquid leads, generated by fractional quantum Hall edge states, is discussed. Our work on the dissipative resonant level has direct relevance to experiments on a quantum dot coupled to a resistive environment, such as H. Mebrahtu et al., [Nature (London) 488, 61 (2012)].
Performance and characteristics of double layer porous silicon oxide resistance random access memory
(2013-06-24)
Tsai, Tsung-Ming
;
Chang, Kuan-Chang
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Zhang, Rui
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Chang, Ting-Chang
;
Lou, J. C.
A bilayer resistive switching memory device with an inserted porous silicon oxide layer is investigated in this letter. Compared with single Zr:SiOx layer structure, Zr: SiOx/ porous SiOx structure outperforms from various aspects, including low operating voltages, tighter distributions of set voltage, higher stability of both low resistance state and high resistance state, and satisfactory endurance characteristics. Electric field simulation by COMSOL (TM) Multiphysics is applied, which corroborates that intensive electric field around the pore in porous SiOx layer guides the conduction of electrons. The constraint of conduction path leads to better stabilization and prominent performance of bilayer resistive switching devices. (C) 2013 AIP Publishing LLC.