Browsing by Issue Date, starting with "2014-11-01"

Now showing 1 - 20 of 25156

Exploring lasing modes and polarization characteristics in broad-area square-shaped vertical-cavity surface emitting lasers with frequency detuning
(2014-11-01)
Yu, Y. T.
;
Tuan, P. H.
;
Wen, C. P.
;
Huang, K. F.
;
Chen, Y. F.
We experimentally explore the polarization characteristics of broad-area square-shaped vertical-cavity surface emitting lasers with the cryogenic cooling to achieve a wide range of frequency detuning. At room temperature the lasing modes are subject to thermal effects and exhibit the phenomenon of polarization switching. For operating temperatures below 260 K, the transverse modes are confirmed to be mainly controlled by the lateral oxide boundary and usually do not display polarization switching. Near the maximum frequency detuning, the lasing modes are well localized on the ray trajectories and display a remarkable frequency-locking phenomenon from single-frequency to multi-frequency operation for the injected current changing from near to far above lasing threshold.
「服貿」與農業
(2014-11)
黃紹恆
;
Shaw-herng Huang
;
College of Hakka Studies
;
International Center for Hakka Studies
;
客家文化學院
本文在探討服貿對於台灣農業的影響。
「服貿」經濟治理中的社會／族群影響
(2014-11)
張翰璧
;
Han-pi Chang
;
College of Hakka Studies
;
International Center for Hakka Studies
;
客家文化學院
本文在探討我們應該用什麼樣的概念架構去理解「服貿」爭議，以及「服貿」爭議對客家文化相關產業有什麼樣具體的影響？
Identifying the Modal Parameters of a Structure from Ambient Vibration Data via the Stationary Wavelet Packet
(2014-11-01)
Su, W. C.
;
Huang, C. S.
;
Chen, C. H.
;
Liu, C. Y.
;
Huang, H. C.
Ambient vibration tests are conducted widely to estimate the modal parameters of a structure. The work proposes an efficient wavelet-based approach to determine the modal parameters of a structure from its ambient vibration responses. The proposed approach integrates the time series autoregressive (AR) model with the stationary wavelet packet transform. In addition to providing a richer decomposition and allowing for an improved time-frequency localization of signals over that of the discrete wavelet transform, the stationary wavelet packet transform also has significantly higher computational efficiency than the wavelet packet transform in terms of decomposing time-shifted signals because the former has a time-invariance property. The correlation matrices needed in determining the coefficient matrices in an AR model are established in subspaces expanded by stationary wavelet packets. The formulation for estimating the correlation matrices is shown for the first time. Because different subspaces contain signals with different frequency subbands, the fine filtering property enhances the ability of the proposed approach to identify not only the modes with strong modal interference, but also many modes from the responses of very few measured degrees of freedom. The proposed approach is validated by processing the numerically simulated responses of a seven-floor shear building, which has closely spaced modes, with considering the effects of noise and incomplete measurements. Furthermore, the present approach is employed to process the velocity responses of an eight-storey steel frame subjected to white noise input in a shaking table test and ambient vibration responses of a cable-stayed bridge.
基於多通道獨立成分分析之訊號即時處理系統及方法
(2014-11-01)
方偉騏
;
石偉業
;
廖瑞傑
;
黃冠儒
;
陳秋國
一種基於多通道獨立成分分析之訊號即時處理系統及方法,首先令處理器利用運算模組對一組第一資料進行多通道獨立成分分析以產生複數個第二資料和第三資料,接著令去雜訊模組利用該運算模組辨識複數個第二資料中的雜訊並去除所辨識出的雜訊以產生複數個第四資料,最後令重建模組利用該運算模組根據複數個第四資料和第三資料對該組第一資料進行重建,以產生複數個第五資料。本發明將處理器、去雜訊模組、重建模組及運算模組皆設置於一晶片上,使處理器、去雜訊模組及重建模組共享該運算模組以達到即時處理並節省硬體資源之功效。
林淑玲等：《臺灣客家族群史專題研究3：臺灣客家族群關係研究──以屏東縣內埔鄉與萬巒鄉為例》
(2014-11)
施雅軒
;
Ya-hsuan Shih
;
College of Hakka Studies
;
International Center for Hakka Studies
;
客家文化學院
本文針對《臺灣客家族群史專題研究3：臺灣客家族群關係研究-以屏東縣內埔鄉與萬巒鄉為例》一書進行相關評論，主要針對幾個角度進行解析的工作，分別是研究區位背景、語言的空間差異、歷史建構與主體意識等等，來進行討論的工作。
而該書對於讀者而言，其所造成的啟發性，尤其是內埔、萬巒兩地，是全面而紮實，透過閱讀該書，將能輕易掌握這兩個地方以客家為中心，進而與鄰近族群的互動歷程。
High performance AlInN/AlN/GaN p-GaN back barrier Gate-Recessed Enhancement-Mode HEMT
(2014-11-01)
Adak, Sarosij
;
Sarkar, Arghyadeep
;
Swain, Sanjit
;
Pardeshi, Hemant
;
Pati, Sudhansu Kumar
In the present work, we propose and perform extensive simulation study of the novel device structure having a p-GaN back barrier layer inserted in the conventional AlInN/AlN/GaN Gate-Recessed Enhancement-Mode HEMT device for reducing the short channel effects, gate leakage and enhancing the frequency performance. The influence of the p-GaN back barrier layer on the device performance of the newly proposed structure is done using 2D Sentaurus TCAD simulations. The simulations use Drift Diffusion (DD) model, Masetti and Canali model, which are calibrated/validated with the previously published experimental results. Simulation are done to analyze the transfer characteristics, transconductance (g(m)), Gate leakage current (I-g), drain induced barrier lowering (DIBL), subthreshold slope (SS), threshold voltage (Vth), On-current Off-current ratio (I-on/l(off)), gate capacitance (C-gg) and cut off frequency (f(r)) of the proposed device. A comparison is done between the device without back barrier layer and the proposed device with p-GaN back barrier layer. Use of p-GaN back barrier layer helps to achieve a higher positive Vth due to the depletion effect, reduced I-g, reduced DIBL, prevents degradation of SS and helps to increase the f(T). Very impressive f(r) up to 123 GHz, as compared to 70 GHz for the device without back barrier. These results indicate that AlInN/AlN/GaN Gate-Recessed Enhancement-Mode HEMT structure with p-GaN back barrier is a promising candidate for microwave and switching application. (C) 2014 Elsevier Ltd. All rights reserved.
導言:「服貿」爭議與客家／族群研究
(2014-11)
許維德
;
Wei-der Shu
;
College of Hakka Studies
;
International Center for Hakka Studies
;
客家文化學院
如果從「客家研究」，乃至「族群研究」的角度來看，我們該如何看待「服貿協議」對客家族群與其他弱勢族群的可能影響呢？更進一步講，在對「服貿協議」進行分析時，「族群」又到底是不是個有其「獨特運作邏輯」的「概念」呢？這篇導言回顧了本期「議題論辯」──「服貿」爭議與客家／族群研究──的9篇文章，並將其分成三大類，包括(1). 理解「服貿」爭議的一般性概念架構(i.e., 黃應貴、林秀幸、張翰璧)；(2). 「族群」做為理解「服貿」影響的可能變項(i.e., 謝世忠、黃世明、黃智慧)；以及(3). 「族群」做為理解「服貿」影響的觀察場域(i.e., 黃紹恆、劉介修、邱星崴)。本導言的結語指出，一方面，我們似乎無法同意「『服貿』對『族群』沒有影響」這樣的說法；另一方面，在對「服貿」之影響進行分析的時候，「族群」雖然在某些場域上是個重要的變項，但在某些場域上卻必須配合其他變項（比如說「地域」）才可能觀察到其影響力。
微件個人化及互動之架構及其方法
(2014-11-01)
曾建超
;
盧昱樺
;
何承遠
;
黃瑜茜
本發明提供一種微件個人化及互動之架構及其方法，其係將複數微件之使用者資料及關聯性設定產生使用者偏好金鑰及使用者偏好設定值，並將金鑰及設定值填入微件之網址中，重新載入微件即可得到個人化微件。而微件之設定資料儲存於文件物件模型(Document Object Model)中，包含複數元件之數值，當微件之間互有關聯性時，更可透過一轉換模組將相關之元件數值傳送到另一微件中，替換掉另一微件之文件物件模型中該元件之數值，以改變微件之內容。
An Effective Procedure for Supplier Selection Applied to Glass Substrate Processes with Multiple Lines
(2014-11-01)
Pearn, W. L.
;
Wu, C. H.
;
Chuang, C. C.
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
In this paper, we consider a supplier selection problem, which compares two glass substrate processes with multiple lines and selects the one that has a higher capability. A test statistic obtained by a subtraction method is employed to establish a hypothesis test with two phases. Critical values of the test are obtained to determine the selection decisions. Sample sizes required for various designated selection powers and confidence levels are also investigated. Practitioners can use the proposed method to make reliable decisions. This paper presents a real-world case of a glass substrate process. The selection procedure uses data to reach a decision in supplier selection. We compare the results of the division method to the proposed subtraction method. The results show that the proposed subtraction method is indeed more powerful than the division method.
Using naturalistic driving data to explore the association between traffic safety-related events and crash risk at driver level
(2014-11-01)
Wu, Kun-Feng
;
Aguero-Valverde, Jonathan
;
Jovanis, Paul P.
;
運輸與物流管理系註：原交通所+運管所
;
Department of Transportation and Logistics Management
There has been considerable research conducted over the last 40 years using traffic safety-related events to support road safety analyses. Dating back to traffic conflict studies from the 1960s these observational studies of driver behavior have been criticized due to: poor quality data; lack of available and useful exposure measures linked to the observations; the incomparability of self-reported safety-related events; and, the difficulty in assessing culpability for safety-related events. This study seeks to explore the relationships between driver characteristics and traffic safety-related events, and between traffic safety-related events and crash involvement while mitigating some of those limitations. The Virginia Tech Transportation Institute 100-Car Naturalistic Driving Study dataset, in which the participants\' vehicles were instrumented with various cameras and sensors during the study period, was used for this study. The study data set includes 90 drivers observed for 12-13 months driving. This study focuses on single vehicle run-off-road safety-related events only, including 14 crashes and 182 safety-related events (30 near crashes, and 152 crash-relevant incidents). Among the findings are: (1) drivers under age 25 are significantly more likely to be involved in safety-related events and crashes; and (2) significantly positive correlations exist between crashes, near crashes, and crash-relevant incidents. Although there is still much to learn about the factors affecting the positive correlation between safety-related events and crashes, a Bayesian multivariate Poisson log-normal model is shown to be useful to quantify the associations between safety-related events and crash risk while controlling for driver characteristics. (C) 2014 Elsevier Ltd. All rights reserved.
Efficient Coverage-Driven Stimulus Generation Using Simultaneous SAT Solving, with Application to SystemVerilog
(2014-11-01)
Cheng, An-Che
;
Yen, Chia-Chih (Jack)
;
Val, Celina G.
;
Bayless, Sam
;
Hu, Alan J.
SystemVerilog provides powerful language constructs for verification, and one of them is the covergroup functional coverage model. This model is designed as a complement to assertion verification, that is, it has the advantage of defining cross-coverage over multiple coverage points. In this article, a coverage-driven verification (CDV) approach is formulated as a simultaneous Boolean satisfiability (SAT) problem that is based on covergroups. The coverage bins defined by the functional model are converted into Conjunction Normal Form (CNF) and then solved together by our proposed simultaneous SAT algorithm PLNSAT to generate stimuli for improving coverage. The basic PLNSAT algorithm is then extended in our second proposed algorithm GPLNSAT, which exploits additional information gleaned from the structure of SystemVerilog covergroups. Compared to generating stimuli separately, the simultaneous SAT approaches can share learned knowledge across each coverage target, thus reducing the overall solving time drastically. Experimental results on a UART circuit and the largest ITC benchmark circuits show that the proposed algorithms can achieve 10.8x speedup on average and outperform state-of-the-art techniques in most of the benchmarks.
Toward high efficiency and panel size 30 x 40 cm(2) Cu(I,Ga)Se-2 solar cell: Investigation of modified stacking sequences of metallic precursors and pre-annealing process without Se vapor at low temperature
(2014-11-01)
Wu, Tsung-Ta
;
Huang, Jyun-Hong
;
Hu, Fan
;
Chang, Chia-ho
;
Liu, Wen-Long
Modified stacking sequence of precursors and pre-annealing process on Se vapor at low temperature were applied to Cu(ln,Ga)Se-2 (CIGS) solar. The remarkable improvement of efficiency (5.53-10.10% and further 11.04%) and open circuit voltage (0.41 V-0.53 V and further 0.56 V) comes from a compact, smooth microstructure, and modified depth profile of Ga with suitable thickness of CuGa multi-stacking layers in the top of precursors as well as surface bandgap enhancement via pre-nnealing process without Se vapor followed by a specific non-toxic hydrogen-assisted solid Se vapor selenization process. The effects of microstructural, compositional and electrical characteristics of Ga distribution including accumulation and interdiffusion were examined in detail. Finally, a large-area (40 x 30 cm(2)) CIGS solar cell efficiency with improved open circuit voltage (V-OC) and fill factor (FE) of 36% and 14% has been demonstrated, yielding a promising efficiency of similar to 11.04%. (C) 2014 Elsevier Ltd. All rights reserved.
A Novel Credit Risk Assessment Model Using a Granular Computing Technique
(2014-11-01)
Chang, Yung-Chia
;
Chang, Kuei-Hu
;
Hsiao, Chien-Wen
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
Information about financial risk almost always contains a problem of class imbalance. Class-imbalanced data refers to the asymmetric categories of data, and it is divided into a major class and a minor class. If we guide all information into the training sample to model of this situation, it may happen that the accuracy rate of the major class is high, but the accuracy rate of the minor class is too low. Many risk assessment models have been developed in many studies, but most of them only use sampling methods to deal with the class-imbalanced data; this may cause the distortion of information. In order to effectively solve the problem of class imbalance in credit risk assessment, this paper proposed a novel credit risk assessment model using a granular computing technique to construct a risk assessment model to provide a better insight into the essence of data and effectively solve class imbalance problems. On the other hand, in order to improve the lack of granular computing and enhance the efficiency of the credit risk assessment model, this paper adds a new index, "% of minor class (PM)," to avoid a situation in which minor class data spread to the major class granular. Finally, this paper also compares the results of the area under the receiver operating characteristic curve (AUC) and G-means methods for dealing with class-imbalanced data. The results demonstrate that the proposed granular computing credit assessment model would have better results than other sampling models.
碳吸收劑及其製造方法與使用方法
(2014-11-01)
陳三元
;
蘇芳儀
;
張博學
本案係提供一種碳吸收劑，包括：複數氧化鈣(CaO)；複數非結晶之氧化鋁(Al2O3)，分散於該複數氧化鈣(CaO)中，以形成一鈣鋁基多孔洞結構；以及複數抗燒結離子，分散於該鈣鋁基多孔結構中，其中該複數抗燒結離子包括鋁離子、鎂離子、鈉離子、鐵離子、鎳離子、鋇離子、鋅離子、矽、其他金屬離子或其任意組合。
Gas permeable silver nanowire electrode for realizing vertical type sensitive gas sensor
(2014-11-01)
Chuang, Ming-Yen
;
Zan, Hsiao-Wen
;
Yu, Peichen
;
Lai, Yi-Chun
;
Meng, Hsin-Fei
We successfully demonstrated a Poly (3-hexylthiophene) (P3HT) diode gas sensor with silver nanowires as a gas permeable top electrode. The silver nanowires dispersed in isopropyl alcohol (IPA) were used to form a top electrode by a simple drop-casting method. The meshes between nanowires enable gas molecules pass through the electrode and diffuse into the underlying organic sensing layer to dope or dedope the organic semiconductor. Here, the proposed sensor successfully detects ammonia down to 30 parts-per-billion (ppb), which is sensitive enough in many applications including breath ammonia monitoring as a point-of-care application. (C) 2014 Elsevier B.V. All rights reserved.
Green Transmission Technologies for Balancing the Energy Efficiency and Spectrum Efficiency Trade-off
(2014-11-01)
Wu, Yiqun
;
Chen, Yan
;
Tang, Jie
;
So, Daniel K. C.
;
Xu, Zhikun
As 4G wireless networks are vastly and rapidly deployed worldwide, 5G with its advanced vision of all connected world and zero distance communications is already at the corner. Along with the super quality of user experience brought by these new networks, the shockingly increasing energy consumption of wireless networks has become a worrying economic issue for operators and a big challenge for sustainable development. Green Transmission Technologies (GTT) is a project focusing on the energy-efficient design of physical-layer transmission technologies and MAC-layer radio resource management in wireless networks. In particular, fundamental trade-offs between spectrum efficiency and energy efficiency have been identified and explored for energy-efficiency-oriented design and optimization. In this article, four selected GTT solutions are introduced, focusing on how they utilize the degrees of freedom in different resource domains, as well as how they balance the trade-off between energy and spectrum efficiency. On top of the elaboration of separated solutions, the GTT toolbox is introduced as a systematic tool and unified simulation platform to integrate the proposed GTT solutions together.
靜態記憶體及記憶胞
(2014-11-01)
周世傑
;
杜明賢
;
胡育豪
;
莊景德
;
邱奕瑋
本發明提出靜態記憶體及記憶胞，靜態記憶胞包括第一至第六電晶體、第一至第三開關、第一及第二下拉開關。在進行資料寫入時，透過截止第二或第五電晶體來切斷由第一至第六電晶體所構成的閂鎖電路的閂鎖能力，以加快資料寫入的速度及加強寫入能力。第一及第二開關提供資料讀出或寫入的路徑，而第三開關則耦接至位元線以接收位元上的資料或傳送資料至位元線。
「服貿」對客家「特色」產業的影響
(2014-11)
黃世明
;
Shi-ming Huang
;
College of Hakka Studies
;
International Center for Hakka Studies
;
客家文化學院
本文在了解什麼是「特色產業」，並從「服貿」思考其對客家特色產業可能的影響。
Expression of Survivin and p53 Modulates Honokiol-Induced Apoptosis in Colorectal Cancer Cells
(2014-11-01)
Lai, Ying-Jiun
;
Lin, Chien-I
;
Wang, Chia-Lin
;
Chao, Jui-I
;
交大名義發表
Honokiol is a small biphenolic compound, which exerts antitumor activities; however, the precise mechanism of honokiol-induced apoptosis in the human colorectal cancer cells remains unclear. Here, we show that survivin and p53 display the opposite role on the regulation of honokiol-induced apoptosis in the human colorectal cancer cells. Honokiol induced the cell death and apoptosis in various colorectal cancer cell lines. Moreover, honokiol elicited the extrinsic death receptor pathway of DR5 and caspase 8 and the intrinsic pathway of caspase 9. The common intrinsic and extrinsic downstream targets of activated caspase 3 and PARP protein cleavage were induced by honokiol. Interestingly, honokiol reduced anti-apoptotic survivin protein and gene expression. Transfection with a green fluorescent protein (GFP)-survivin-expressed vector increased the colorectal cancer cell viability and resisted the honokiol-induced apoptosis. Meantime, honokiol increased total p53 and the phosphorylated p53 proteins at Ser15 and Ser46. The p53-wild type colorectal cancer cells were exhibited greater cytotoxicity, apoptosis and survivin reduction than the p53-null cancer cells after treatment with honokiol. Together, these findings demonstrate that the existence of survivin and p53 can modulate the honokiol-induced apoptosis in the human colorectal cancer cells. J. Cell. Biochem. 115: 1888-1899, 2014. (c) 2014 Wiley Periodicals, Inc.