Browsing by Issue Date, starting with "2013-06-17"

Now showing 1 - 20 of 31371

Saturation of the free carrier absorption in ZnTe crystals
(2013-06-17)
Ku, S. A.
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Tu, C. M.
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Chu, W. -C.
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Luo, C. W.
;
Wu, K. H.
This study systematically investigates the influence of free carriers on the generation of THz in ZnTe crystals, over a wide range of pumping fluences. As the pumping fluence is increased (< 6.36 mJ/cm(2)), the concentration of free carriers gradually increases and the THz output power is saturated, as clearly demonstrated by the time delay in the THz temporal waveforms, the changes in the THz spectral weight and the red-shift in the PL spectra. For high pumping fluences (> 6.36 mJ/cm(2)), spectacularly, there is a significant quadratic increase in the THz output power when the pumping fluence is increased, as well as at low pumping fluences of < 0.58 mJ/cm(2), because of the saturation of free carriers. (C) 2013 Optical Society of America
The aspect ratio effect on plasmonic properties and biosensing of bonding mode in gold elliptical nanoring arrays
(2013-06-17)
Tsai, Chia-Yang
;
Chang, Kai-Hao
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Wu, Che-Yao
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Lee, Po-Tsung
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光電工程學系
We investigate both numerically and experimentally the optical properties and biosensing of gold elliptical nanoring (ENR) arrays with various aspect ratios. The gold ENR exhibits a strong localized surface plasmon bonding mode in near-infrared region, whose peak wavelength is red-shifted as increasing the aspect ratio under longitudinal and transverse polarizations. Furthermore, the disk- and hole-like optical properties for longitudinal and transverse modes are observed, which cause different behaviors in field intensity enhancement. For biomolecule sensing, we find that both modes show increased surface sensitivities when enlarging the aspect ratio of gold ENR. (C) 2013 Optical Society of America
検出能を高めるフォトダイオードデバイス及びその形成方法
(2013-06-17)
ファン－チュンチェン
;
シュ－チェンリン
【課題】暗電流を引き下げ、それによりフォトダイオードデバイスの検出能を引き上げると同時に、良好な光感応及び外部量子効率を維持できるようにし、さらに、現有の無機感光体装置に代替することで、製品コストを引き下げる。【解決手段】基板１０と、基板１０において形成される透明導電性フィルム１２と、透明導電性フィルム１２において形成される導電性ポリマー層１４と、導電性ポリマー層１４において形成される有機活性層１６と、有機活性層１６において形成される電荷ブロッキング層１８と、電荷ブロッキング層１８において形成される陰極金属２０を含むフォトダイオードデバイスの形成方法。【選択図】図１
Charge pump device
(2013-06-18)
Shao Chi Yi
;
Chao Paul C.-P.
A charge pump device is coupled to first and second input terminals receiving an AC signal and comprises an electric switch set and two voltage boost circuits. The electric switch set is coupled to the first and second input terminals and a ground terminal and switches the conduction status thereof according to the AC signal. The two voltage boost circuits are interconnected and coupled to the first and second input terminals and the electric switch set. The boost circuits receive the AC signal according to the conduction status, respectively boost voltage in positive and negative semi-periods of the AC signal, and alternatively output a voltage at least two times the peak voltage of the AC signal, to a load. The present invention not only boosts voltage by several folds within a cycle but also outputs voltage by dual phases to reduce ripple of output voltage.
Address generation apparatus and method for quadratic permutation polynomial interleaver
(2013-06-18)
Lee Shuenn-Gi
;
Wang Chung Hsuan
;
Sheen Wern-Ho
An address generation apparatus for quadratic permutation polynomial (QPP) interleaver receives several configurable parameters and uses a plurality of QPP units to compute and outputs a plurality of interleaving addresses according to a QPP function Π(i)=(f1i+f2i2) mod k, where f1 and f2 are QPP coefficients, k is information block length of an input sequence, 0≦i≦k−1, and mod is a modulus operation. Each of the plurality of QPP units is a parallel computation unit, and outputs in parallel a corresponding group of interleaver addresses, where Π(i) is also a ith interleaving address generated by the apparatus.
Evaluation of Carboxymethyl-Hexanoyl Chitosan as a Protein Nanocarrier
(2013-06-18)
Larsson, Mikael
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Borde, Annika
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Mattisson, Emma
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Liu, Dean-Mo
;
Larsson, Anette
Carboxymethyl-hexanoyl chitosan (CHC) has the ability to self-assemble into nanocapsules in an aqueous solution and it has recently shown potential in numerous biomedical applications. Here we investigate the protein loading efficiency and release, as well as the structural properties of CHC protein nanocarriers. Bovine serum albumin (BSA) or its chromophore labelled version, fluorescein-BSA, was used as a model protein and the loading was performed with a simple mixing of pre-formed nanocapsules and protein. Dynamic light scattering and zeta potential analysis revealed that protein loaded nanocarriers with high positive zeta potential were formed. The protein loaded nanocarriers displayed a loading efficiency of 75% and a very slow protein release. In summary, our results highlight the potential of CHC as a protein nanocarrier, but also indicate that protein-CHC interactions need to be considered in protein containing CHC formulations where protein release is not the main function.
Delay cell and digitally controlled oscillator
(2013-06-18)
Lee Chen-Yi
;
Yu Chien-Ying
;
Yu Chia-Jung
A delay cell includes a first inverted transistor pair, a second inverted transistor pair and a plurality of delay units. The first inverted transistor pair is used to receive an input signal. The second inverted transistor pair is electrically cross-coupled to the first inverted transistor pair and cross-controlled by the first inverted transistor pair. The delay units are cascaded between the first inverted transistor pair and between the second inverted transistor pair, thereby providing a plurality of signal propagation delays sequentially, wherein the input signal is delayed for a pre-determined time by the first inverted transistor pair, the second inverted transistor pair and the delay units which are operated sequentially, thereby creating an output signal corresponding to the pre-determined time. A digitally controlled oscillator including the aforementioned delay cells is provided.
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.