Browsing by Issue Date, starting with "2014-12-01"

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Metal-Cu2O core-shell nanocrystals for gas sensing applications: Effect of metal composition
(2014-12-01)
Lin, Yin-Kai
;
Chiang, Yu-Ju
;
Hsu, Yung-Jung
;
材料科學與工程學系
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Department of Materials Science and Engineering
A fast, versatile citrate-binding approach has been developed to prepare metal-Cu2O core-shell nanocrystals with different metal compositions, such as Au, Ag and Pd. Because of the electron trapping of the metal core, metal-Cu2O nanocrystals exhibited enhanced CO sensing performance in comparison with pure Cu2O. Steady-state photoluminescence and photocurrent measurements were conducted to investigate the electron trapping effect of the metal and its significance in the CO sensing mechanism. Among the three metal-Cu2O nanocrystals tested, Au-Cu2O displayed the highest CO response, attributable to the largest electron trapping capability of Au which enlarged the extent of resistance change for CO detection. The ability to improve the gas sensing performance of Cu2O by means of metal introduction has significant implications in the development of gas sensor technology, especially the strategies of materials combination and heterostructure engineering. (C) 2014 Elsevier B.V. All rights reserved.
白頭「工男」話當年：訪全觀聯第一代運動組織者林子文、毛振飛、吳永毅
(深河出版有限公司, 2014-12-01)
陳素香
;
陳筱茵
;
洪嘉寧
Shape-From-Focus Depth Reconstruction With a Spatial Consistency Model
(2014-12-01)
Tseng, Chen-Yu
;
Wang, Sheng-Jyh
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電子工程學系及電子研究所
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Department of Electronics Engineering and Institute of Electronics
This paper presents a maximum a posteriori (MAP) framework to incorporate a spatial consistency prior model for depth reconstruction in the shape-from-focus (SFF) process. Existing SFF techniques, which reconstruct a dense 3-D depth from multifocus image frames, usually have poor performance over low-contrast regions and usually need a large number of frames to achieve satisfactory results. To overcome these problems, a new depth reconstruction process is proposed to estimate the depth values by solving an MAP estimation problem with the inclusion of a spatial consistency model. This consistency model assumes that within a local region, the depth value of each pixel can be roughly predicted by an affine transformation of the image features at that pixel. A local learning process is proposed to construct the consistency model directly from the multifocus image sequence. By adopting this model, the depth values can be inferred in a more robust way, especially over low-contrast regions. In addition, to improve the computational efficiency, a cell-based version of the MAP framework is proposed. Experimental results demonstrate the effective improvement in accuracy and robustness as compared with existing approaches over real and synthesized image data. In addition, experimental results also demonstrate that the proposed method can achieve quite impressive performance, even with only the use of a few image frames.
意識邊境（下）
(深河出版有限公司, 2014-12-01)
崔綵珊
Effect of spatial hole burning on a dual-wavelength mode-locked laser based on compactly combined dual gain media
(2014-12-01)
Huang, Y. J.
;
Tzeng, Y. S.
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Cho, H. H.
;
Chen, Y. F.
;
電子物理學系
The effect of spatial hole burning (SHB) on dual-wavelength self-mode-locked lasers based on physically combined Nd:YVO4/Nd:LuVO4 and Nd:YVO4/Nd:KGW composite active medium is comparatively investigated. The length of the first Nd:YVO4 crystal is optimized to realize a highly compact and efficient TEM00-mode pico-second laser at 1.06 mu m with optical conversion efficiency greater than 20%. When the SHB effect is enhanced by decreasing the separation between the input end mirror and the composite gain medium, it is experimentally found that not only the pulse duration monotonically decreases, but also the temporal behavior gradually displays a narrow-peak-on-a-pedestal shape for the Nd:YVO4/Nd:LuVO4 scheme, while the multipulse operation can be obtained for the Nd:YVO4/Nd: KGW configuration. These phenomena are further explored by numerically simulating mode-locked pulses from the experimentally measured optical spectra. (C) 2014 Chinese Laser Press
編案
(深河出版有限公司, 2014-12-01)
陳光興
使用週期性重置積分之角度解調變裝置及其方法
(2014-12-01)
洪浩喬
;
陳昀澤
;
洪紹峰
使用週期性重置積分之角度解調變裝置及其方法，其使用波形乘法器及週期性重置積分器，可將一連續時間角度調變訊號解調變為一離散時間訊號。將連續時間角度調變訊號先經過波形乘法器乘上頻率為整數倍載波頻率的方波訊號後，傳送至週期性重置積分電路進行積分一個載波週期而產生一離散時間角度解調變輸出訊號。本發明對於調變深度的值並無任何限制，因此可大幅地降低前端光學式感測系統的設計難度，實現了體積小、速度快、靈敏度高、可靠度高、性能佳、環境適應性強之功效。
A Fully Integrated BIST Delta Sigma ADC Using the In-Phase and Quadrature Waves Fitting Procedure
(2014-12-01)
Hung, Shao-Feng
;
Hong, Hao-Chiao
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電機資訊學士班
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Undergraduate Honors Program of Electrical Engineering and Computer Science
This paper demonstrates a fully integrated builtin self-test (BIST) Delta Sigma analog-to-digital converter (ADC) based on the proposed in-phase and quadrature waves fitting (IQWF) procedure. The IQWF procedure enables accurately measuring the phases and amplitudes of test responses so as to enhance the test accuracy of the BIST circuitry. The all-digital BIST circuitry, with on-chip stimulus generator and response analyzer, conducts single-tone functional tests to test for the ADCs characterization results such as signal-to-noise-and-distortion ratio (SNDR), dynamic range (DR), frequency response, input-referred offset, and gain error. Since the IQWF procedure is performed successively in real time, the BIST circuitry does not need huge memory to store all the output samples like conventional fast Fourier transform (FFT) analysis does. The overall hardware overhead only consists of 16.6 k digital gates. The fully integrated BIST Delta Sigma ADC has been fabricated in 0.18-mu m CMOS. Measurement results show that the BIST circuitry reports a peak SNDR of 88.0 dB and a DR of 92.6 dB while the corresponding FFT-based analog tests result in 88.8 and 94.1 dB, respectively. Particularly, the BIST circuitry achieves a test bandwidth as wide as the ADCs 20-kHz rated bandwidth, which is the widest to the best of our knowledge. The proposed BIST ADC can be tested without costly external test resources and is thus well suited for the applications in which conventional test resources are not available such as 3-D ICs.
Pheophytin a Inhibits Inflammation via Suppression of LPS-Induced Nitric Oxide Synthase-2, Prostaglandin E2, and Interleukin-1 beta of Macrophages
(2014-12-01)
Lin, Chun-Yu
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Lee, Chien-Hsing
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Chang, Yu-Wei
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Wang, Hui-Min
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Chen, Chung-Yi
Inflammation is a serious health issue worldwide that induces many diseases such as sepsis. There has been a vast search for potentially effective drugs to decrease mortality from sepsis. Pheophytin a is a chlorophyll-related compound derived from green tea. We found that pre-treatment with pheophytin a suppressed lipopolysaccharide (LPS)-induced nitric oxide (NO), prostaglandin E2 (PGE2), and interleukin-1 beta in RAW 264.7 macrophages. NO synthase-2 (NOS2) and cyclooxygenase-2 (COX-2) expression levels were repressed by pre-treatment with pheophytin a at both the transcriptional and translational levels. Pheophytin a inhibited NOS2 promoter activity, but not its mRNA stability, through extracellular signal-regulated kinase (ERK1/2). This suppression was reversed by ERK1/2 inhibitor (U0126). Pheophytin a reduced signal transducers and activators of transcription 1 (STAT-1) activation, without an obvious influence on activator protein-1 (AP-1) and nuclear factor kappa B (NF-kappa B). These results suggest that pheophytin a functions by down-regulating the transcriptional levels of inflammatory mediators and blocking the ERK and STAT-1 pathways.
Bipolar tri-state resistive switching characteristics in Ti/CeOx/Pt memory device
(2014-12-01)
Ismail, M.
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Abbas, M. W.
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Rana, A. M.
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Talib, I.
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Ahmed, E.
Highly repeatable multilevel bipolar resistive switching in Ti/CeOx/Pt nonvolatile memory device has been demonstrated. X-ray diffraction studies of CeO2 films reveal the formation of weak polycrystalline structure. The observed good memory performance, including stable cycling endurance and long data retention times (> 10(4) s) with an acceptable resistance ratio (similar to 102), enables the device for its applications in future non-volatile resistive random access memories (RRAMs). Based on the unique distribution characteristics of oxygen vacancies in CeOx films, the possible mechanism of multilevel resistive switching in CeOx RRAM devices has been discussed. The conduction mechanism in low resistance state is found to be Ohmic due to conductive filamentary paths, while that in the high resistance state was identified as Ohmic for low applied voltages and a space-charge-limited conduction dominated by Schottky emission at high applied voltages.
專利間接侵權之制度規範：我國判決實證研究與法制建議
(交通大學科技法律研究所, 2014-12)
王立達
;
陳師敏
;
Richard Li-Dar Wang
;
Shih-Min Chen
專利間接侵權，係以誘引或輔助他人侵害專利之方式，損害專利權之行為。為確保專利保護之實效性，美、日與英、德等歐洲國家專利法均設有間接侵權規定，將侵害專利風險較高之特定間接行為，於直接侵權之外另設獨立規範課以侵權責任。我國迄今尚未將間接侵權納入專利法規範，本文分析美國、歐洲兩大陣營間接侵權制度之構成要件設計，作為本土研究之參照基礎，並且據以分析智慧局曾經提出之間接侵權草案條文。在現行法下，國內學說實務均肯認專利間接侵害得以民法第185條之造意或幫助等共同侵權行為予以課責。為究明我國目前實際規範狀態，本文針對10年來專利共同侵權之法院判決進行實證研究。調查結果顯示，我國司法實務上主張間接侵權與認定成立之案件數量均甚為稀少。法院對於間接侵權責任採取從屬於直接侵權之立場；然而，對於間接侵權是否以故意為必要，以及所涵蓋的幫助行為範圍，各法院立場分歧，其見解亦不無有待斟酌之處。為彌補司法實務因直接侵權人無過失，從屬免除間接侵權人之侵權責任，導致間接侵權人即使蓄意引發專利侵權，仍無須為之負責的專利保護真空狀態，我國專利法應明文設置間接侵權之規範條文，並且參照國外法制經驗，妥善設計其涵蓋範圍與構成要件，避免間接侵權責任過於廣泛，以導引本制度之良善發展。
不在陽光下盛開的花
(深河出版有限公司, 2014-12-01)
許恩恩
Dynamics of Industrial Cluster Scenarios
(2014-12-01)
Itoga, Holly
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Lin, Grace T. R.
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Yang, Fred Chia-Han
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Shyu, Joseph Z.
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科技管理研究所
This research aims to explore the dynamic co-opetition of industrial cluster evolution based on the Lotka-Volterra model. Particularly, an empirical co-opetition case of industrial innovation parks, Southern and Central Taiwan Science Park (STSP and CTSP), will be used to demonstrate the validity of the dynamic approach. The results reveal that the competitive relationship between STSP and CTSP may be a predator-prey interaction type. The existence of STSP and its investment growth will be of positive assistance in developing the latter CTSP area. Contrarily, the growth of CTSP will probably compete with the resources of STSP and inhibit the sustained growth of STSP. In addition, an equilibrium point does not exist in the competition relationship of these two clusters from 2003 to 2010, in which STSP and CTSP areas should coexist with sustained growth in this current short-term stage.
Modeling Job Pursuit Intention: Moderating Mechanisms of Socio-Environmental Consciousness
(2014-12-01)
Tsai, Yuan-Hui
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Joe, Sheng-Wuu
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Lin, Chieh-Peng
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Wang, Rong-Tsu
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經營管理研究所
Many scholars have suggested the relationship between corporate social performance and its ability to attract a large number of high-quality job applicants, because previous literature indicates that employees with strong social awareness help create a high-performance organization. For that reason, an important issue for successful business recruitment is how to boost the pursuit intention of job seekers. This study discusses such issue by proposing a model based on signaling theory and cognitive dissonance theory. In the proposed model of this study, the positive relationships between four dimensions of corporate social performance and job pursuit intention are hypothetically moderated by socio-environmental consciousness. The proposed hypotheses of this research were empirically tested using the data from graduating students seeking a job. The empirical findings of this study complement previous literature by discussing how corporate social performance benefits business firms from a perspective of strengthened human resources and recruitment. Finally, managerial implications for business managers based on the findings herein are provided.
架接抗體之雙乳化核殼奈米結構
(2014-12-01)
江智聖
;
胡尚秀
;
陳三元
本發明提供一種架接抗體之雙乳化核殼奈米結構。在油相殼包覆水相核而成之雙乳化核殼奈米結構的表面引進架橋基，以與抗體相接，形成架接抗體之雙乳化核殼奈米結構。
A VIF-based optimization model to alleviate collinearity problems in multiple linear regression
(2014-12-01)
Jou, Yow-Jen
;
Huang, Chien-Chia Liam
;
Cho, Hsun-Jung
;
運輸與物流管理系註：原交通所+運管所
;
資訊管理與財務金融系註：原資管所+財金所
In this paper, we address data collinearity problems in multiple linear regression from an optimization perspective. We propose a novel linearly constrained quadratic programming model, based on the concept of the variance inflation factor (VIF). We employ the perturbation method that involves imposing a general symmetric non-diagonal perturbation matrix on the correlation matrix. The proposed VIF-based model reduces the largest VIF by minimizing the resulting biases. The VIF-based model can mitigate the harm from data collinearity through the reduction in both the condition number and VIFs, meanwhile improving the statistical significance. The resulting estimator has bounded biases under an iterative framework and hence is termed the least accumulative bias estimator. Certain potential statistical properties can be further considered as the side constraints for the proposed model. Various numerical examples validate the proposed approach.
化歷史為力量：閱讀《無悔：陳明忠回憶錄》
(深河出版有限公司, 2014-12-01)
延光錫
Analysis of two-phonon infrared spectral features of gallium arsenide and indium phosphide by first-principles calculations
(2014-12)
Lin, Huang-Hsiang
;
Chung, Pei-Kang
;
Yen, Shun-Tung
;
電機學院
;
電子工程學系及電子研究所
We perform a self-consistent calculation based on density functional perturbation theory to analyze the infrared spectral features of GaAs and InP arising from two-phonon processes. The features are identified and assigned the critical points in the first Brillouin zone. Distribution of the critical points is investigated. The analysis demonstrates that collections of phonons of wave vectors around symmetry points and along symmetry lines are responsible for strong infrared features in two-phonon processes.
靜態隨機存取記憶體胞元及其操作方法
(2014-12-01)
邱議德
;
張銘宏
;
楊皓義
;
黃威
Learning a hidden graph
(2014-12-01)
Chang, Huilan
;
Fu, Hung-Lin
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Shih, Chih-Huai
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應用數學系
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Department of Applied Mathematics
We study the problem of learning a hidden graph by edge-detecting queries, each of which tells whether a set of vertices induces an edge of the hidden graph or not. We provide a new information-theoretic lower bound and give a more efficient adaptive algorithm to learn a general graph with n vertices and m edges in m log n + 10m + 3n edge-detecting queries.