Browsing by Issue Date, starting with "2015-08-24"

Now showing 1 - 20 of 21150

Investigation of defect-induced abnormal body current in fin field-effect-transistors
(2015-08-24)
Liu, Kuan-Ju
;
Chang, Ting-Chang
;
Chen, Ching-En
;
Yang, Ren-Ya
;
Tsai, Jyun-Yu
This letter investigates the mechanism of abnormal body current at the linear region in n-channel high-k/metal gate stack fin field effect transistors. Unlike body current, which is generated by impact ionization at high drain voltages, abnormal body current was found to increase with decreasing drain voltages. Notably, the unusual body leakage only occurs in three-dimensional structure devices. Based on measurements under different operation conditions, the abnormal body current can be attributed to fin surface defect-induced leakage current, and the mechanism is electron tunneling to the fin via the defects, resulting in holes left at the body terminal. (C) 2015 AIP Publishing LLC.
Polymer stabilization of electrohydrodynamic instability in non-iridescent cholesteric thin films
(2015-08-24)
Hsiao, Yu-Cheng
;
Lee, Wei
;
影像與生醫光電研究所
;
Institute of Imaging and Biomedical Photonics
A non-iridescent cholesterol liquid crystal (CLC) thin film is demonstrated by using the polymer-stabilized electrohydrodymanic (PSEHD) method. The photopolymerized cell made from a CLC/monomer mixture exhibits an optically stable gridlike pattern. The helical axis of thus-formed CLC is aligned with the hydrodynamic flow induced by a space charge motion, and the arrayed CLC grid configuration renders a wide viewing angle thanks to the limited color shift at various lines of sight. The formation of the PSEHD structure was verified with polarized optical microscopy, ascertaining that the electrohydrodymanic pattern can be photo-cured or stabilized. The PSEHD CLC is simple to fabricate and potentially suitable for applications in wide-viewing-angle or non-iridescent devices. (C) 2015 Optical Society of America
Intracavity continuous-wave multiple stimulated-Raman-scattering emissions in a KTP crystal pumped by a Nd:YVO4 laser
(2015-08-24)
Lee, C. Y.
;
Chang, C. C.
;
Sung, C. L.
;
Chen, Y. F.
;
電子物理學系
Intracavity continuous-wave (CW) multiple stimulated-Raman-scattering emissions have been successfully demonstrated in a KTP crystal pumped by a Nd:YVO4 1064-nm laser for the first time. Three different output couplers (OCs) with high-reflection (HR) coating in the range of 1-1.1, 1-1.13, and 1-1.15 mu m are employed in the experiment to generate lasing wavelengths at 1095 (the first-Stokes emission of the 266 cm(-1) Raman shift), 1095 + 1128 (the first-and second-Stokes emission of the 266 cm-1 Raman shift), and 1095 + 1128 + 1149 nm (the first two Stokes emissions of the 266 cm-1 Raman shift and the first-Stokes emission of the 694 cm-1 Raman shift), separately. This Raman laser paves a way to produce more-closely spaced set of CW emission in the green-yellow region. (C) 2015 Optical Society of America
SENSOR ELECTRODE DEVICE
(2015-08-27)
LIN CHIN-TENG
;
CHENG JUI-HUANG
;
LU SHAO-WEI
A sensor electrode device comprises a base and a plurality of flexible electrodes. The flexible electrodes protrude from one side of the base, detecting at least one physiological signal and sending out the physiological signal via the base. The flexible electrodes can expel hairs to directly contact the skin, whereby hairs would not hinder the sensor electrode device from detecting physiological signals. Further, the tips of the flexible electrodes bend under pressure to increase the area contacting the skin and improve the ability to detect physiological signals.
METHOD OF GENERATING IN-KERNEL HOOK POINT CANDIDATES TO DETECT ROOTKITS AND THE SYSTEM THEREOF
(2015-08-27)
Wang Chi-wei
;
Chen Chong-kuan
;
Wang Chia-wei
;
Shieh Shiuhpyng
A method for determining whether a to-be-tested program contains malicious behavior is disclosed. The method includes steps of providing an emulator having a kernel and a plurality of installed hook points, wherein the kernel has a plurality of in-kernel functions; executing the to-be-tested program in the emulator dynamically to invoke the plurality of installed hook points to obtain a specific in-kernel function set from the plurality of in-kernel functions; and determining whether the to-be-tested program contains instructions for malicious behavior based on an invocation sequence of the specific in-kernel function set.
Congenital muscular dystrophy with fatty liver and infantile-onset cataract caused by TRAPPC11 mutations: broadening of the phenotype
(2015-08-28)
Liang, Wen-Chen
;
Zhu, Wenhua
;
Mitsuhashi, Satomi
;
Noguchi, Satoru
;
Sacher, Michael
Background: Transport protein particle (TRAPP) is a multiprotein complex involved in endoplasmic reticulum-to-Golgi trafficking. Zebrafish with a mutation in the TRAPPC11 orthologue showed hepatomegaly with steatosis and defects in visual system development. In humans, TRAPPC11 mutations have been reported in only three families showing limb-girdle muscular dystrophy (LGMD) or myopathy with movement disorders and intellectual disability. Methods: We screened muscular dystrophy genes using next-generation sequencing and performed associated molecular and biochemical analyses in a patient with fatty liver and cataract in addition to infantile-onset muscle weakness. Results: We identified the first Asian patient with TRAPPC11 mutations. Muscle pathology demonstrated typical dystrophic changes and liver biopsy revealed steatosis. The patient carried compound heterozygous mutations of a previously reported missense and a novel splice-site mutation. The splice-site change produced two aberrantly-spliced transcripts that were both predicted to result in translational frameshift and truncated proteins. Full-length TRAPPC11 protein was undetectable on immunoblotting. Conclusion: This report widens the phenotype of TRAPPC11-opathy as the patient showed the following: (1) congenital muscular dystrophy phenotype rather than LGMD; (2) steatosis and infantile-onset cataract, both not observed in previously reported patients; but (3) no ataxia or abnormal movement, clearly indicating that TRAPPC11 plays a physiological role in multiple tissues in human.
Efficient far-infrared thermal bremsstrahlung radiation from a heterojunction bipolar transistor
(2015-08-28)
Chung, Pei-Kang
;
Yen, Shun-Tung
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
We investigate the far-infrared thermal radiation properties of a heterojunction bipolar transistor. The device conveniently provides a high electric field for electrons to heat the lattice and the electron gas in a background with ions embedded. Because of very high effective temperature of the electron gas in the collector, the electron-ion bremsstrahlung makes efficient the thermal radiation in the far-infrared region. The transistor can yield a radiation power of 0.1 mW with the spectral region between 2 and 75 THz and a power conversion efficiency of 6 x 10(-4). Such output contains a power of 20 mu W in the low-frequency part (2-20 THz) of the spectrum. (C) 2015 AIP Publishing LLC.
Quantum-mechanical approach to predissociation of water dimers in the vibrational adiabatic representation: Importance of channel interactions
(2015-08-28)
Mineo, H.
;
Niu, Y. L.
;
Kuo, J. L.
;
Lin, S. H.
;
Fujimura, Y.
The results of application of the quantum-mechanical adiabatic theory to vibrational predissociation (VPD) of water dimers, (H2O)(2) and (D2O)(2), are presented. We consider the VPD processes including the totally symmetric OH mode of the dimer and the bending mode of the fragment. The VPD in the adiabatic representation is induced by breakdown of the vibrational adiabatic approximation, and two types of nonadiabatic coupling matrix elements are involved: one provides the VPD induced by the low-frequency dissociation mode and the other provides the VPD through channel interactions induced by the low-frequency modes. The VPD rate constants were calculated using the Fermi golden rule expression. A closed form for the nonadiabatic transition matrix element between the discrete and continuum states was derived in the Morse potential model. All of the parameters used were obtained from the potential surfaces of the water dimers, which were calculated by the density functional theory procedures. The VPD rate constants for the two processes were calculated in the non-Condon scheme beyond the so-called Condon approximation. The channel interactions in and between the initial and final states were taken into account, and those are found to increase the VPD rates by 3(1) orders of magnitude for the VPD processes in (H2O)(2) ((D2O)(2)). The fraction of the bending-excited donor fragments is larger than that of the bending-excited acceptor fragments. The results obtained by quantum-mechanical approach are compared with both experimental and quasi-classical trajectory calculation results. (C) 2015 AIP Publishing LLC.
Lasing action and extraordinary reduction in long radiative lifetime of type-II GaSb/GaAs quantum dots using circular photonic crystal nanocavity
(2015-08-31)
Hsu, Kung-Shu
;
Hung, Wei-Chun
;
Chang, Chih-Chi
;
Lin, Wei-Hsun
;
Shih, Min-Hsiung
We demonstrated the lasing action and remarkable reduction in long radiative lifetimes of type-II GaSb/GaAs quantum dots using a circular photonic-crystal nano-cavity with high Purcell factors. The associated enhancement in carrier recombination was surprisingly high and could even surpass type-I counterparts in similar conditions. These phenomena reveal that the type-II sample exhibited extremely low nonradiative recombination so that weak radiative transitions were more dominant than expected. The results indicate that type-II nanostructures may be advantageous for applications which require controllable radiative transitions but low nonradiative depletions. (C) 2015 AIP Publishing LLC.
A Fast Prototyping Framework for Analog Layout Migration With Planar Preservation
(2015-09-01)
Pan, Po-Cheng
;
Chin, Ching-Yu
;
Chen, Hung-Ming
;
Chen, Tung-Chieh
;
Lee, Chin-Chieh
Analog layout generation in the advanced CMOS design is challenging by its increasing layout constraints and performance requirements. This situation becomes more intricate by the growing parasitic variability and manufacturing reliability. To facilitate the feasibility of template-based layout migration, this paper first introduces a layout preservation, which extracts placement and routing behaviors from an existing layout into a crossing graph via constrained Delaunay triangulation. And later this crossing graph can be migrated into multiple layouts with placement and routing reconnection. The proposed approach also provides a refinement for wire to optimize the performance metrics. This approach is applied to a variable-gain amplifier, a folded-cascode operational amplifier, and a low dropout regulator. The experimental results demonstrate more possibility on layout migration, such that averagely more than 75% routing of migrated layout is generated by our approach. Additionally, it exhibits the productivity with qualified performance on different designs.
Enabling High-Injection Current Light-Emitting Diodes Prepared on 10-mu m-Thick GaN Films Grown by Hydride Vapor Phase Epitaxy
(2015-09-01)
Chen, Yu-An
;
Chang, Chia-Wei
;
Kuo, Cheng-Huang
;
照明與能源光電研究所
;
Institute of Lighting and Energy Photonics
In this paper, we successfully introduced the sputtered AlN/patterned sapphire substrate template into hydride vapor phase epitaxy (HVPE) using a two-step growth method. This method simplified the procedure, realized uninterrupted growth, and improved the crystal quality of GaN films. The effects of light-emitting diodes (LEDs) grown on a 10-mu m-thick GaN film through HVPE were also compared with those of the LEDs grown on a 2.4-mu m-thick GaN film through metal organic chemical vapor deposition (MOCVD). Compared with the LEDs grown on the 2.4-mu m-thick GaN film through MOCVD, the LEDs grown on the 10-mu m-thick GaN film through HVPE had significantly enhanced light output power (3.24-4.79 mW) and extended saturation current (300-355 mA). These improvements of the LEDs were attributed to the better thermal conductivities and better crystal quality of the 10-mu m-thick GaN film through HVPE than those of the 2.4-mu m-thick GaN film through MOCVD.
Analytical representation of the state-dependent coefficients in the SDRE/SDDRE scheme for multivariable systems
(2015-09-01)
Lin, Li-Gang
;
Vandewalle, Joos
;
Liang, Yew-Wen
;
電控工程研究所
;
Institute of Electrical and Control Engineering
Recently, the easy-to-implement state-dependent Riccati equation (SDRE) strategy has been shown effective for numerous practical applications. Since being similar to SDRE, the newly emerged state-dependent differential Riccati equation (SDDRE) approach shares most of the benefits of SORE, and exhibits interesting potential from both the analytical and practical viewpoints. By generalizing previous works to the general-order nonlinear time-variant systems, we try to resolve several problems related to the design flexibility (the infinitely many candidates of the state-dependent coefficient matrix), since they appear at the beginning of the implementation of both schemes. Finally, we demonstrate the proposed scheme via examples. (C) 2015 Elsevier Ltd. All rights reserved.
Reversible DCT-based data hiding in stereo images
(2015-09-01)
Yang, Wen-Chao
;
Chen, Ling-Hwei
;
資訊工程學系
;
Department of Computer Science
Stereo images captured from a pair of CCDs simultaneously are widely used to create the illusion of 3D depth. Each pair of stereo images has many similar block pairs. In this paper, a novel reversible data hiding method is proposed to embed secret data in these similar block pairs. To increase the embedding capacity, each 3-bit secret data is first converted to a pair of integers. Then, similar block pairs are found based on the lower frequency DCT-quantized coefficients. Each converted integer is embedded via the difference of a pair of middle frequency DCT-quantized coefficients from these similar block pairs. It is worth mentioning that the proposed method is reversible, but the existing data hiding methods for stereo images are irreversible. Experimental results show that the proposed method is undetectable under Chi-square analysis, and it provides high embedding capacity while maintaining acceptable quality of stereo images higher than 30 dB. The experimental results also show that the proposed method outperforms Chang et al.\'s method and Lin and Shiu\'s method in embedding capacity and image quality.
Quantitative evaluation of the impact of night shifts and alcohol consumption on construction tiling quality
(2015-09-01)
Dzeng, Ren-Jye
;
Wang, Shih-Hsu
;
Fang, Yi-Cho
;
土木工程學系
;
Department of Civil Engineering
The adverse effects of night-shift work and alcohol consumption on performance have received considerable attention. However, how night shifts and alcohol affect productivity in workers has not been quantified. This paper describes the experiments featuring multiple tiling tasks and patterns. The tiling quality performed by the graduate student participants in four different statuses was objectively evaluated by an edge-detection computer program. The results indicate that both night shift and alcohol significantly reduce the quality in general, and the effects of the factors on position and alignment-angle qualities were dissimilar in distinct areas due to tile patterns and size. Both night-shift and alcohol conditions affected the basic (-34.01% and -25.79%) and advanced tiling abilities (-40.14% and -26.16%), and night shift had a larger impact than alcohol. These results provide jobsite managers with usable information regarding how night shifts and alcohol affect workers\' abilities to execute basic and advanced tasks. (C) 2015 Elsevier Ltd and The Ergonomics Society. All rights reserved.
LOW-COST PERVASIVE 'MOBI-IN-A-BOX'
(2015-09-01)
Jung, Tzyy-Ping
;
Wu, Ying
;
Wang, Tu-Te
;
Zheng, Guang-Yu
;
Gan, Gary
Tool Replacement for Photovoltaic Industry Processes With Multiple Characteristics Based on Capability Index
(2015-09-01)
Hsu, Ya-Chen
;
Jane, Amber
;
Pearn, W. L.
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
In the photovoltaic industry, measuring efficiency is an important process for manufacturing silicon wafers. The cutting tool gradually wears during the measuring efficiency process. Consequently, the fraction of defectives would gradually become significant. When the fraction defective reaches a certain level, the tool must be replaced. Therefore, it is essential to find out the optimal time to replace the cutting tool for minimizing the fraction defective and reducing the manufacturing cost. In this research, we consider the replacement problem in the photovoltaic industry to obtain the optimal replacement time for the measuring efficiency process. The measuring efficiency process involves multiple product quality characteristics, including the I-sc, V-oc, and R-sh. In order to maintain the high wafer process quality and to minimize the production cost, we first develop a method for measuring the manufacturing capability of measuring efficiency process. Then, a tool replacement policy is proposed to assess the true capability at each time period of measuring efficiency process and to find out the optimal time for tool replacement.
On the regularity of solutions to Poisson's equation
(2015-09-01)
Garg, Rahul
;
Spector, Daniel
;
應用數學系
;
Department of Applied Mathematics
In this note, we announce new regularity results for some locally integrable distributional solutions to Poisson\'s equation. This includes, for example, the standard solutions obtained by convolution with the fundamental solution. In particular, our results show that there is no qualitative difference in the regularity of these solutions in the plane and in higher dimensions. (C) 2015 Published by Elsevier Masson SAS on behalf of Academie des sciences.
人生中的許多第一次－芬蘭交換學習心得
(國立陽明大學, 2015-09)
方端儀
Tour de India－A Bohemian Story
(國立陽明大學, 2015-09)
Monoj Mon Kalita
Biothiol-triggered, self-disassembled silica nanobeads for intracellular drug delivery
(2015-09-01)
Huang, Xin-Chun
;
Wu, Li-Bang
;
Hsu, Jen-Fang
;
Shigeto, Shinsuke
;
Hsu, Hsin-Yun
Silica-based nanomaterials have demonstrated great potential in biomedical applications due to their chemical inertness. However, the degradability and endosomal trapping issues remain as rate-limiting barriers during their innovation. In this study, we provide a simple yet novel sol-gel approach to construct the redox-responsive silica nanobeads (ReSiNs), which could be rapidly disassembled upon redox gradient for intracellular drug delivery. The disulfide-linked scaffold of the nanobead was synthesized by employing the dithiobis-(succinimidyl propionate) to bridge (3-aminopropyI)-trimethoxysilane. Such silica matrix could be efficiently disrupted in response to intracellular glutathione, resulting in drug release and collapse of entire nanocarrier. Moreover, the ReSiNs exhibited insignificant cytotoxicity before and after the degradation. These results indicated the potential of using ReSiNs as a novel silica-based, biothiol-degradable nanoplatform for future drug delivery. (C) 2015 Acts Materialia Inc. Published by Elsevier Ltd. All rights reserved.