Browsing by Issue Date, starting with "2014-01-28"

Now showing 1 - 20 of 27747

Method for carry estimation of reduced-width multipliers
(2014-01-28)
Liao Yen-Chin
;
Chang Hsie-Chia
A low-error reduced-width multiplier is provided by the present invention. The multiplier can dynamically compensate the truncation error. The compensation value is derived by the dependencies among the multiplier partial products, and thus, can be analyzed according to the multiplication type and the multiplier input statistics.
Elliptic flow from thermal photons with magnetic field in holography
(2014-01-28)
Mueller, Berndt
;
Wu, Shang-Yu
;
Yang, Di-Lun
;
物理研究所
;
丘成桐中心
We compute the elliptic flow v(2) of thermal photons in a strongly coupled plasma with constant magnetic field via gauge/gravity duality. The D3/D7 embedding is applied to generate the contributions from massive quarks. By considering the cases in 2 + 1 flavor super Yang-Mills analogous to the photon production in quark gluon plasma, we obtain the thermal photon v(2), which is qualitatively consistent with the direct photon v(2) measured at the relativistic heavy ion collider at intermediate energy. However, due to the simplified setup, the thermal photon v(2) in our model should be regarded as the upper bound for the v(2) generated by solely a magnetic field in the strongly coupled scenario.
Communication: Three-dimensional model for phonon confinement in small particles: Quantitative bandshape analysis of size-dependent Raman spectra of nanodiamonds
(2014-01-28)
Korepanov, Vitaly I.
;
Witek, Henryk
;
Okajima, Hajime
;
Osawa, Eiji
;
Hamaguchi, Hiro-O
Raman spectroscopy of nano-scale materials is facing a challenge of developing a physically sound quantitative approach for the phonon confinement effect, which profoundly affects the phonon Raman band shapes of small particles. We have developed a new approach based on 3-dimensional phonon dispersion functions. It analyzes the Raman band shapes quantitatively in terms of the particle size distributions. To test the model, we have successfully obtained good fits of the observed phonon Raman spectra of diamond nanoparticles in the size range from 1 to 100 nm. (C) 2014 AIP Publishing LLC.
Coupling between Protein Conformation and Local Unfolding Highlights the Role of Disorder in Protein Function and Suggests a New Target for Tuberculosis Treatment
(2014-01-28)
Morrell, Thomas E.
;
Rafalska-Metcalf, Ilona U.
;
Chu, Jhih-Wei
;
Yang, Haw
;
交大名義發表
Live Cell Imaging with Rab-Gtpases Elucidates Intracellular Pathways of RGD and iRGD Tagged Cationic Lipid-DNA Nanoparticles
(2014-01-28)
Majzoub, Ramsey N.
;
Ewert, Kai K.
;
Kotamraju, Venkata R.
;
Chan, Chia-Ling
;
Liang, Keng S.
A Single-Step Digital Nucleic Acid Amplification Platform by Digital Plasma Separation on a Chip
(2014-01-28)
Yeh, Erh-Chia
;
Yeh, Chi-Cheng Fu
;
Hu, Lucy
;
Huang, Meng-Yao
;
Lee, Luke P.
Kinetic Ising Model Study of Protein Aggregation
(2014-01-28)
Tsai, Min-Yeh
;
Yuan, Jian-Min
;
Lin, Sheng-Hsien
;
應用化學系
;
Department of Applied Chemistry
Method for Making Porous Materials
(2014-01-30)
LEU Jih-Perng
;
CHEN Yu-Han
A method for manufacturing a porous material is disclosed, which comprises the following steps: providing a substrate; coating the substrate with a precursor solution to form a precursor film, wherein the precursor solution includes a precursor compound, a porogen, and a solvent, and the porogen is modified by a surface modification to have an absolute surface electric potential of >25 mV; and treating the precursor film with a thermal curing profile to remove the porogen and form a porous material.
METHOD FOR MANUFACTURING A NOZZLE PLATE CONTAINING MULTIPLE MICRO-ORIFICES FOR CASCADE IMPACTOR
(2014-01-30)
TSAI Chuen-Jinn
;
CHEN Sheng-Chieh
;
CHEN Hong-Dar
A nozzle plate containing multiple micro-orifices for the cascade impactor and a method for manufacturing the same are disclosed. The nozzle plate is formed by a series of semiconductor processes, including lithography, etching and electroplating. The nozzle plate comprises a plate body and a plurality of micro-orifices formed on the plate body. The orifice has a diameter which gradually expands in the direction away from the bottom of the plate body to achieve a smooth inner surface, allowing particles to pass therethrough smoothly without being clogged in the nozzle plate.
MOTION PARAMETER ESTIMATING METHOD, ANGLE ESTIMATING METHOD AND DETERMINATION METHOD
(2014-01-30)
Huang Chung-Jung
;
Dai Chia-Wei
;
Tsai Tsung-Yu
;
Lee Ta-Sung
A motion parameter estimating method, an angle estimating method and a determination method are provided. The methods are adapted for an electronic device. In the angle estimating method, a first frequency modulation continuous wave signal is first transmitted, and at least one antenna receives a second frequency modulation continuous wave signal resulted by a target reflecting the first frequency modulation continuous wave signal. Multiple motion parameters associated with the target are then obtained according to the first frequency modulation continuous wave signal and the second frequency modulation continuous wave signal. Multiple measured values corresponding to the at least one antenna are obtained according to the motion parameters and configuration parameters of the at least one antenna, respectively. Afterwards, the measured values are substituted into a formula to obtain an estimated angle between a preset direction of the electronic device and the target.
METHOD OF PROTEIN PURIFICATION
(2014-01-30)
LI Yaw-Kuen
;
WU Yue-Jin
A method for producing a target protein is provided, which includes steps described below. A crude extract including a fusion protein is provided. The fusion protein includes a tag, a target protein and a linker inserted between the tag and the target protein. The fusion protein and magnetic particles are then bound to form a magnetic particle-binding fusion protein. Finally, the linker of the magnetic particle-binding fusion protein undergoes autocleavage by using a cleavage buffer solution to release the target protein. A one-pot process for producing a purified target protein is also provided.
An efficient synthesis of the C27-C45 fragment of lagunamide A, a cyclodepsipeptide with potent cytotoxic and antimalarial properties
(2014-01-31)
Liu, Hui-Ming
;
Chang, Chieh-Yu
;
Lai, Ya-Chi
;
Yang, Mei-Due
;
Chang, Ching-Yao
An efficient and stereoselective synthesis of the entire C27-C45 moiety of lagunamide A has been achieved from 1-[(4S)-4-benzyl-2-thioxothiazolidin-3-yl]propan-1-one in six steps with 22% overall yield. The key step in the synthesis is an asymmetric acetal aldol reaction featuring the enantioselective addition of a chiral thiazolidinethione-derived titanium enolate to an acetal to establish the stereochemistry at C39. (C) 2013 Elsevier Ltd. All rights reserved.
Efficient Multiply-by-3 and Divide-by-3 Algorithms and Their Fast Hardware Implementation
(2014-02-01)
Wey, Chin-Long
;
Jui, Ping-Chang
;
Sung, Gang-Neng
;
電機工程學系
;
Department of Electrical and Computer Engineering
This study presents efficient algorithms for performing multiply-by-3 (3N) and divide-by-3 (N/3) operations with the additions and subtractions, respectively. No multiplications and divisions are needed. Full adder (FA) and full subtractor (FS) can be implemented to realize the N3 and N/3 operations, respectively. For fast hardware implementation, this paper introduces two basic cells UCA and UCS for 3N and N/3 operations, respectively. For 3N operation, the UCA-based ripple carry adder (RCA) and carry lookahead adder (CLA) designs are proposed and their speed performances are estimated based on the delay data of standard cell library in TSMC 0.18 mu m CMOS process. Results show that the 16-bit UCA-based RCA is about 3 times faster than the conventional FA-based RCA and even 25% faster than the FA-based CLA. The proposed 16-bit and 64-bit UCA-based CLAs are 62% and 36% faster than the conventional FA-based CLAs, respectively. For N/3 operations, ripple borrow subtractor (RBS) is also presented. The 16-bit UCS-based RBS is about 15.5% faster than the 16-bit FS-based RBS.
Optimality of Frame Aggregation-Based Power-Saving Scheduling Algorithm for Broadband Wireless Networks
(2014-02-01)
Liu, Wen-Jiunn
;
Feng, Kai-Ten
;
Tseng, Po-Hsuan
;
電機資訊學士班
;
Undergraduate Honors Program of Electrical Engineering and Computer Science
The limitation on battery lifetime has been a critical issue for the advancement of mobile computing. Different types of power-saving techniques have been proposed in various fields. In order to provide feasible energy-conserving mechanisms for the mobile subscriber stations (MSSs), three power-saving types have been proposed for the IEEE 802.16e broadband wireless networks. However, these power-saving types are primarily targeting for the cases with a single connection between the base station (BS) and the MSS. With the existence of multiple connections, the power efficiency obtained by adopting the conventional scheduling algorithm can be severely degraded. In this paper, with the consideration of multiple connections and their quality-of-service (QoS) constraints, a frame aggregation-based powersaving scheduling (FAPS) algorithm is proposed to enhance the power efficiency by aggregating multiple under-utilized frames into fully-utilized ones. The optimality on the minimum number of listen frames in the proposed FAPS algorithm is also provided, and is further validated via the correctness proofs. Performance evaluation of proposed FAPS scheme is conducted and compared via simulations. Simulation results show that the power efficiency of FAPS algorithm outperforms the other existing protocols with tolerable frame delay.
Solution-processable bismuth iodide nanosheets as hole transport layers for organic solar cells
(2014-02-01)
Boopathi, Karunakara Moorthy
;
Raman, Sankar
;
Mohanraman, Rajeshkumar
;
Chou, Fang-Cheng
;
Chen, Yang-Yuang
In this paper we demonstrate the use of low-temperature-solution-processable bismuth iodide (BiI3) nanosheets as hole transport layers in organic photovoltaics with an active layer comprising poly(3-hexylthiophene) (P3HT) mixed with a fullerene derivative. The performance of the resulting devices was comparable with that of corresponding conventionally used systems incorporating polyethylenedioxythiophene:polystyrenesulfonate (PEDOT:PSS). UV-vis spectroscopy revealed that the transparency of a BiI3 layer in the visible ( > 620 nm) and near-infrared range is greater than that of a PEDOT:PSS layer. X-ray photoemission spectroscopy of a BiI3 film revealed signals at 158.8, 164, 618.6, and 630 eV-characteristic of Bi 4f(7/2), Bi 4f(5/2), I 3d(5/2), and I 3d(3/2), respectively-that indicated a stoichiometric BiI3 film. Wet milling of BiI3 crystals resulted in the formation of nanosheets, the presence of which we confirmed using scanning electron microscopy. The resultant power conversion efficiency of the device was approximately 3.5%, with an open-circuit voltage of 0.56 V, a short-circuit current density of 10.4 mA cm(-2), and a fill factor of 60.1% under AM1.5G irradiation (100 mW cm(-2)). (C) 2013 Elsevier B.V. All rights reserved.
Tri-Resistive Switching Behavior of Hydrogen Induced Resistance Random Access Memory
(2014-02-01)
Chu, Tian-Jian
;
Tsai, Tsung-Ming
;
Chang, Ting-Chang
;
Chang, Kuan-Chang
;
Zhang, Rui
In this letter, the special role of hydrogen ions in hafnium doped silicon oxide resistive random access memory (RRAM) is presented. In addition to the more typical oxygen ion-dominated resistive switching, hydrogen ions were also observed to trigger a resistance transformation phenomenon, producing a tri-resistive device. Unlike a normal RRAM device, a hydrogen plasma-treated device is operated with a reversed voltage polarity, and the direction of hydrogen ion migration results in the chemical bonds breaking and repairing. By changing the voltage polarity and stop voltage, this tri-resistive behavior can be achieved. This particular hydrogen-induced switching behavior suggests a different RRAM switching mechanism and is finally explained by our model.
Single-emission-layer white organic light-emitting devices: Chromaticity and colour-rendering consideration
(2014-02-01)
Fan, Chia-Chan
;
Huang, Ming-Hong
;
Lin, Wei-Chieh
;
Lin, Hao-Wu
;
Chi, Yun
The chromaticity and colour-rendering capability of solution-processed single emission layer (EML) white organic light-emitting diodes (W-OLEDs) can be precisely tuned by manipulating the dopant compositions in the EMLs. In this work, we numerically modelled binary, ternary, and quaternary doping single EML W-OLEDs. The correlated colour temperature (CCT), colour-rendering index (CRI), and spectral designs were correlated. The simulation predicted that the quaternary doping system possesses the best chromaticity performance. The corresponding binary, ternary and quaternary doping single EML W-OLEDs were fabricated and characterised to verify the calculation. The solution-processed quaternary doping W-OLEDs were designed with CRI values up to 85, deviations from the Planckian locus (D-u'v') as low as +0.0009, an EQE of 13.7%, a power efficacy of 14.7 lm/W and current efficiency of up to 24.9 cd/A at 1000 cd/m(2). (C) 2013 Elsevier B.V. All rights reserved.
Pumping Flow in a Channel With a Peristaltic Wall
(2014-02-01)
Tsui, Yeng-Yung
;
Guo, Da-Ching
;
Chen, Shin-Hung
;
Lin, Shi-Wen
;
機械工程學系
Simplified models were widely used for analysis of peristaltic transport caused by contraction and expansion of an extensible tube. Each of these models has its own assumptions, and therefore, weakness. To get rid of the limitations imposed by the assumptions, a numerical procedure is employed to simulate this pumping flow in the present study. In earlier studies, the frame of reference adopted moves with the peristaltic speed of the vibrating wall so that the flow becomes steady. The flow characteristics in a wavelength were the main concern. In our calculations, a channel of finite length with a flexible wall is considered. Pressures are prescribed at the inlet and outlet boundaries. The computational grid is allowed to move according to the oscillation of the wall. Another state-of the-art technique employed is to construct the grid in an unstructured manner to deal with the variable geometry of the duct. The effects of dimensionless parameters, such as amplitude ratio, wave number, Reynolds number, and back pressure on the pumping performance are examined. Details of the peristaltic flow structure are revealed. Also conducted is the comparison of numerical results with the theoretical predictions obtained from the lubrication model to determine the suitability of this theory.
A New Data Hiding Method via Revision History Records on Collaborative Writing Platforms
(2014-02-01)
Lee, Ya-Lin
;
Tsai, Wen-Hsiang
;
資訊工程學系
;
Department of Computer Science
A new data hiding method via collaboratively-written articles with forged revision history records on collaborative writing platforms is proposed. The hidden message is camouflaged as a stego-document consisting of a stego-article and a revision history created through a simulated process of collaborative writing. The revisions are forged using a database constructed by mining word sequences used in real cases from an English Wikipedia XML dump. Four characteristics of article revisions are identified and utilized to embed secret messages, including the author of each revision, the number of corrected word sequences, the content of the corrected word sequences, and the word sequences replacing the corrected ones. Related problems arising in utilizing these characteristics for data hiding are identified and solved skillfully, resulting in an effective multiway method for hiding secret messages into the revision history. To create more realistic revisions, Huffman coding based on the word sequence frequencies collected from Wikipedia is applied to encode the word sequences. Good experimental results show the feasibility of the proposed method.
純化蛋白質的方法
(2014-02-01)
李耀坤
;
吳岳進
在此揭露一種產生標的蛋白的方法，其包含下列步驟。提供粗萃物，其包含融合蛋白。此融合蛋白包含標記物、標的蛋白以及連接子，此連接子插入到標記物及標的蛋白間。然後，結合磁性粒子與融合蛋白，以形成磁性粒子結合融合蛋白。最後，藉由斷裂用緩衝液使磁性粒子結合融合蛋白的連接子自我斷裂，以釋出標的蛋白。在此亦提供一種用以產生純化標的蛋白的一鍋化製程。