Browsing by Issue Date, starting with "2017-08-01"

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讀書－《探索丁玲：日本女性研究者論集》編案
(深河出版有限公司, 2017-08-01)
蔡鈺淩
Forensic applications of direct analysis in real time (DART) coupled to Q-orbitrap tandem mass spectrometry for the in situ analysis of pigments from paint evidence
(2017-08-01)
Chen, Tai-Hung
;
Wu, Shu-Pao
;
應用化學系
;
Department of Applied Chemistry
The accurate examination of paint fragments obtained from an accident, such as those obtained from vehicles involved in a hit-and-run case, is often critical in forensic investigations. However, organic pigments are typically minor components of automotive coatings, which makes discrimination difficult. In this study, direct analysis in real time coupled to Q-orbitrap tandem mass spectrometry (DART-MS) was employed to detect a wide range of common organic pigments in vehicle paints. Twelve common organic pigments used in vehicle paints, such as red, yellow, orange, and purple, were tested, and a database was constructed for future examinations of vehicle paint. Two hit-and-run vehicle accident cases, which occurred in New Taipei City, were investigated by Fourier transform infrared (FTIR) spectroscopy and DART-MS. First, FTIR spectroscopy was employed to study the paint samples as a preliminary screening step. Most of the observed IR peaks were attributed to binder and extenders present in paints. The IR peaks corresponding to the organic pigments were found to be weak and overlapped with those corresponding to resins. On the other hand, DART-MS successfully characterized the organic pigments. DART-MS was found to be excellent for rapidly determining the presence of organic pigments in paint samples without the need for a complicated pre-treatment process or lengthy analysis time. (C) 2017 Elsevier B.V. All rights reserved.
A methodology to assess the supply chain performance based on gap-based measures
(2017-08-01)
Liu, Fuh-hwa Franklin
;
Liu, Yu-cheng
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
The motivation of this article lies in the application of two-stage gap-based measurement (GBM) in supply chain management. It adopts GBM model to construct a mixed integer program to measure the various stages of supply chain management in manufacturing practice. This paper proposes a new assessment system that aims to measure the aggregated efficiency of the entire supply chain. In this system, "plan source" and "plan make" are the major elements, they are a widely accepted industry standard by Supply Chain Operations Reference (SCOR). "Plan source" emphasizes the assessment of demand/supply planning strategy and suppliers' performance; "plan make" emphasizes the shop floor control, profitability and equipment effectiveness. The resulting GBM scores provide complete information on how to project inefficient DMUs on to the frontier. This article continues with a demonstration of GBM in the company cases, for the results of the assessment; this paper finds the worst efficiency of the DMUs and proposes improvement programs. (C) 2017 Published by Elsevier Ltd.
Demonstrating antiphase domain boundary-free GaAs buffer layer on zero off-cut Si (001) substrate for interfacial misfit dislocation GaSb film by metalorganic chemical vapor deposition
(2017-08-01)
Minh Thien Huu Ha
;
Sa Hoang Huynh
;
Huy Binh Do
;
Tuan Anh Nguyen
;
Quang Ho Luc
High quality 40 nm GaSb thin film was grown on the zero off-cut Si (001)-oriented substrate using metalorganic chemical vapor deposition with the temperature-graded GaAs buffer layer. The growth time of the GaAs nucleation layer, which was deposited at a low temperature of 490 degrees C, is systematically investigated in this paper. Cross-sections of the high resolution transmission electron microscopy images indicate that the GaAs compound formed 3D-islands first before to quasi-2D islands, and finally formed uniform GaAs layer. The optimum thickness of the 490 degrees C-GaAs layer was found to be 10 nm to suppress the formation of antiphase domain boundaries (APDs). The thin GaAs nucleation layer had a root-mean-square surface roughness of 0.483 nm. This allows the continued high temperature GaAs buffer layer to be achieved with low threading dislocation density of around 7.1 x 10(6) cm(-2) and almost invisible APDs. Finally, a fully relaxed GaSb film was grown on the top of the GaAs/Si heterostructure using interfacial misfit dislocation growth mode. These results indicate that the GaSb epitaxial layer can be grown on Si substrate with GaAs buffer layer for future p-channel metal-oxide-semiconductor field effect transistors (MOSFETs) applications.
IoTtalk-RC: Sensors As Universal Remote Control for Aftermarket Home Appliances
(2017-08-01)
Lin, Yun-Wei
;
Lin, Yi-Bing
;
Hsiao, Chung-Yun
;
Wang, Yun-Yen
;
資訊工程學系
Almost half of all Americans either own smart home technology or plan to invest in it. Therefore, many commercial smart IoT solutions aim for home automation, and try to live up with high expectation for smart home. A major problem of these smart home solutions is that they cannot flexibly accommodate the existing remotely controlled aftermarket appliances. This paper proposes IoTtalk remote control (IoTtalk-RC), a mechanism that utilizes sensors as universal software-defined remote control for aftermarket home appliances. Our solution replaces the infrared remote controller of cheap aftermarket home appliances and provides extra intelligence of sensors that can be manipulated by the homeowners. We conduct measurements, analytic analysis and simulation experiments to investigate the time complexity of IoTtalk-RC. This paper indicates that the extra transmission delays of remote control incurred by IoTtalk-RC are small even if the IoTtalk server is remotely located at a virtual machine of a cloud. In other words, IoTtalk-RC is feasible and can be effectively operated with the IoT technology.
Cardiac autonomic dysfunction and arrhythmogenesis in rheumatoid arthritis rats
(2017-08-01)
Lin, T. T. L.
;
Sung, Y. L. S.
;
Wu, C. E. W.
;
Lin, S. F. L.
;
分子醫學與生物工程研究所
影像選輯
(深河出版有限公司, 2017-08-01)
戴爾西．席亞姆蘇馬爾
;
耶利．韋拉萬
;
呂怡婷
850 nm Vertical-Cavity Surface-Emitting Laser Arrays With Enhanced High-Speed Transmission Performance Over a Standard Multimode Fiber
(2017-08-01)
Yen, Jia-Liang
;
Chen, Xin-Nan
;
Chi, Kai-Lun
;
Chen, Jason
;
Shi, Jin-Wei
The functionality of novel parallel and series highspeed vertical-cavity surface-emitting laser (VCSEL) arrays, which can greatly relax the tradeoff between output power and modulation speed, is demonstrated. Both types of array structure allow improvement in the output power with no degradation in their maximum modulation speed as compared to a single reference unit. The observed invariant electrical-optical bandwidth shown for these array structures is mainly due to the effective reduction of the differential resistance and parasitic capacitance, arising from the Zn-diffusion and oxide-relief apertures fabricated in the VCSEL unit. This in turn minimizes the degradation in the RC-limited bandwidth with the VCSEL arrays. Furthermore, the dense packing of single VCSELs, with Zn-diffusion apertures for optical mode control, minimizes the coupling loss between the output from the array into a standard multimode fiber (MMF). Compared with the single VCSEL unit, the parallel VCSEL array shows a significant enhancement in transmission performance over a standard OM4 MMF, which includes a larger eye margin, a higher signal-to-noise ratio, as well as a higher error-free data rate (48 versus 44 Gbit/sec). The device modeling technique is used to perform device analysis. From the results we can conclude that the improvement with the parallel array is because the value of the internal impedance is closer to the 50-Omega signal source, which minimizes the microwave reflection induced timing jitter in the eye-patterns.
A novel hybrid artificial photosynthesis system using MoS2 embedded in carbon nanofibers as electron relay and hydrogen evolution catalyst
(2017-08-01)
Niu, Fujun
;
Dong, Chung-Li
;
Zhu, Changbao
;
Huang, Yu-Cheng
;
Wang, Miao
Inspired by photosynthesis in nature, artificial photosynthesis (AP) systems have been widely investigated in the context of energy and environmental research. Here we report a noble-metal-free AP system for visible-light-driven H-2 generation from aqueous solutions consisting of fluorescein (FL) as photosensitizer, single-layer ultrasmall MoS2 nanoplates embedded in carbon nanofibers (CNF) as electron relay and redox catalyst, and triethanolamine (TEOA) as sacrificial electron donor. This CNF-MoS2/FL system exhibits outstanding H-2 evolution performance, with an H-2 generation rate that exceeds not only both MoS2/FL (by 100%) and CNF/FL (by 1100%), but also the Pt/FL system (by 40%). The excellent photocatalytic activity of this CNF-MoS2/FL system can be ascribed to the synergistic effects of CNF and MoS2 coupling: (1) the simultaneous presence of MoS2 with its delocalized and increased Mo 4d unoccupied states and of CNF with increased graphitic characteristics enables electron transfer from FL* to MoS2 via CNF electron relay; (2) the single-layered ultrasmall MoS2 nanoplates with short effective lengths for electron transfer and high density of reactive S-edges effectively catalyze the H-2 evolution reaction (HER). The presented work successfully fabricated a highly efficient AP system for solar H-2 production from a fully aqueous solution and indicated CNF-MoS2 as a promising candidate to replace Pt for solar fuel conversion. (C) 2017 Elsevier Inc. All rights reserved.
與丁玲的三次「相遇」：女性主義與跨－日本視角
(深河出版有限公司, 2017-08-01)
賀桂梅
Preemptive Parallel-Machine Scheduling with a Common Server to Minimize Makespan
(2017-08-01)
Cheng, T. C. E.
;
Kravchenko, Svetlana A.
;
Lin, Bertrand M. T.
;
資訊管理與財務金融系註：原資管所+財金所
;
Department of Information Management and Finance
We consider parallel-machine scheduling with a common server and job preemption to minimize the makespan. While the non-preemptive version of the problem is strongly NP-hard, the complexity status of the preemptive version has remained open. We show that the preemptive version is NP-hard even if there is a fixed number of machines. We give a pseudo-polynomial time algorithm to solve the case with two machines. We show that the case with an arbitrary number of machines is unary NP-hard, analyze the performance ratios of some natural heuristic algorithms, and present several solvable special cases. (C) 2017 Wiley Periodicals, Inc.
Low-Frequency Noise Performance of Al-Doped ZnO Nanorod Photosensors by a Low-Temperature Hydrothermal Method
(2017-08-01)
Wang, Zi-Hao
;
Yu, Hsin-Chieh
;
Yang, Chih-Chiang
;
Yeh, Hsin-Ting
;
Su, Yan-Kuin
In this paper, we developed a simple hydrothermal method to synthesize vertically aligned ZnO:Al nanorods (NRs) to fabricate a UV photodetector (PD) on a seed layer/glass substrate. The photo-to-dark current ratio of the ZnO: Al NR PD was approximately 1.4 x 10(3) under 1-V bias and UV light irradiation (380 nm). The calculated responsivity of the fabricated PD was 181 A . W-1, and the UV-to-visible rejection ratio of the PD at 1-V applied bias was 1.51 x 10(3). In addition, flicker noise dominated the noise of the ZnO: Al NR PD. The noise-equivalent power and normalized detectivity of the ZnO:Al NR PD were 1.17 x 10(-11) W and 4.03 x 10(12) cm . Hz(0.5)W(-1), respectively.
Carbon Nanotube/Nitrogen-Doped Reduced Graphene Oxide Nanocomposites and Their Application in Supercapacitors
(2017-08-01)
Yang, Chih-Chieh
;
Tsai, Meng-Han
;
Huang, Chun-Wei
;
Yen, Po-Jen
;
Pan, Chien-Chung
Electrodes of carbon-based nanocomposites with high specific surface areas and suitable pore sizes have high potential for improving power and energy densities of supercapacitors. In this study, nitrogen-doped reduced graphene oxide (NrGO) nanosheets were synthesized to increase the specific surface area of reduced graphene oxide (rGO). The specific surface area of NrGO was increased to 633 m(2)g(-1) compared to that of rGO, 450 m(2)g(-1). A series of NrGO/carbon nanotubes (CNTs) nanocomposites were prepared. By using NrGO/CNTs/polyvinylidene difluoride (PVDF)/carbon black/N-methyl-pyrrolidone (NMP) nanocomposites as both of anode and cathode into two electrodes, such symmetric supercapacitor in the 1 M KOH aqueous electrolyte exhibited high specific capacitance (227 F g(-1) at 20 mV s(-1)), fast rate capability (83% capacitance of current density 1 mA cm(-2) at current density 5 mA cm(-2)), low resistance (0.98 Omega), and excellent cycling stability (87% capacitance retention after 10,000 charge/discharge cycles). Moreover, the symmetric supercapacitor in the ionic liquid (BMIMTFSI) electrolyte possessed a wide operating voltage (3 V) and high energy density (89 Wh kg(-1) at 1 mA cm(-2)). The carbon-based hybrid electrode has high potential for use in energy storage and conversion devices.
網路通訊系統、軟體定義網路控制器及其路由方法
(2017-08-01)
林盈達
;
吳政穎
;
林柏青
;
賴源正
本發明提出一種網路通訊系統、軟體定義網路（Software -defined Network，SDN）控制器及其路由方法。此路由方法適於軟體定義網路控制器。此路由方法包括：根據服務鏈（Service chaining）資訊決定對應於至少一個第一服務叢集的第一根交換器，其中所述第一服務叢集中的每一個服務叢集包括用於提供第一服務的至少一服務端點；決定用於將封包流從第一目標交換器引導（routing）至第一根交換器的第一路由路徑資訊；以及依據所述第一服務叢集的叢集資訊為第一根交換器配置第一群組項（group entry）資訊，其中第一群組項資訊用於在第一根交換器執行封包流對應於第一服務的第一路徑選擇。
Reading between the ratings: Modeling residual credit risk and yield overlap
(2017-08-01)
Chang, Charles
;
Fuh, Cheng-Der
;
Kao, Chu-Lan Michael
;
統計學研究所
;
Institute of Statistics
Credit ratings group firms by risk, yet yields are shown to overlap between firms of adjacent ratings. We model this by considering the residual risk arising from differences in the parameters of each firm's value process for firms with the same rating. To do so, our framework simultaneously incorporates jump default with Markov-governed likelihoods and continuous defaults in a default-barrier framework. We provide closed-form approximations for expected default time and tail probabilities, and empirically fit the S-shaped yield curve, intra-rating spread, and inter-rating overlap. Results are robust to time period, rating system, sub-rating, and common characteristics such as liquidity. (C) 2017 Published by Elsevier B.V.
推薦序
(深河出版有限公司, 2017-08-01)
丘延亮
The Global Packing Number of a Fat-Tree Network
(2017-08-01)
Lo, Yuan-Hsun
;
Zhang, Yijin
;
Chen, Yi
;
Fu, Hung-Lin
;
Wong, Wing Shing
Data centers play an important role in today's Internet development. Research to find scalable architecture and efficient routing algorithms for data center networks has gained popularity. The fat-tree architecture, which is essentially a folded version of a Clos network, has proved to be readily implementable and is scalable. In this paper, we investigate routing on a fat-tree network by deriving its global packing number and by presenting explicit algorithms for the construction of optimal, load-balanced routing solutions. Consider an optical network that employs wavelength division multiplexing in which every user node sets up a connection with every other user node. The global packing number is basically the number of wavelengths required by the network to support such a traffic load, under the restriction that each source-to-destination connection is assigned a wavelength that remains constant in the network. In mathematical terms, consider a bidirectional, simple graph, G and let N subset of V(G) be a set of nodes. A path system P of G with respect to N consists of |N|(|N|-1) directed paths, one path to connect each of the source-destination node pairs in N. The global packing number of a path system P, denoted by Phi(G, N, P), is the minimum integer k to guarantee the existence of a mapping phi : P -> {1, 2, . . . , k}, such that phi(P) not equal phi((P) over cap) if P and (P) over cap have common arc(s). The global packing number of (G, N), denoted by Phi (G, N), is defined to be the minimum Phi (G, N, P) among all possible path systems P. In additional to wavelength division optical networks, this number also carries significance for networks employing time division multiple access. In this paper, we compute by explicit route construction the global packing number of (T-n, N), where T-n denotes the topology of the n-ary fat-tree network, and N is considered to be the set of all edge switches or the set of all supported hosts. We show that the constructed routes are load-balanced and require minimal link capacity at all network links.
Simulation Model Development for Packaged Cascode Gallium Nitride Field-Effect Transistors
(2017-08-01)
Wu, Chih-Chiang
;
Jeng, Shyr-Long
;
機械工程學系
;
Department of Mechanical Engineering
This paper presents a simple behavioral model with experimentally extracted parameters for packaged cascode gallium nitride (GaN) field-effect transistors (FETs). This study combined a level-1 metal-oxide-semiconductor field-effect transistor (MOSFET), a junction field-effect transistor (JFET), and a diode model to simulate a cascode GaN FET, in which a JFET was used to simulate a metal-insulator-semiconductor high-electron-mobility transistor (MIS-HEMT). Using the JFET to simulate the MIS-HEMT not only ensures that the curve fits an S-shape transfer characteristic but also enables the pinch-off voltages extracted from the threshold voltage of the MIS-HEMT to be used as a watershed to distinguish where the drop in parasitic capacitance occurs. Parameter extraction was based on static and dynamic characteristics, which involved simulating the behavior of the created GaN FET model and comparing the extracted parameters with experimental measurements to demonstrate the accuracy of the simulation program with an integrated circuit emphasis (SPICE) model. Cascode capacitance was analyzed and verified through experimental measurements and SPICE simulations. The analysis revealed that the capacitance of low-voltage MOSFETs plays a critical role in increasing the overall capacitance of cascode GaN FETs. The turn-off resistance mechanism effectively described the leakage current, and a double-pulse tester was used to evaluate the switching performance of the fabricated cascode GaN FET. LTspice simulation software was adopted to compare the experimental switching results. Overall, the simulation results were strongly in agreement with the experimental results.
鈣鈦礦型發光元件及其製造方法
(2017-08-01)
陳方中
;
黃炯福
一種鈣鈦礦型發光元件，包括第一電極層、第一載子注入層、第一載子傳輸層、發光層、第二載子注入層以及第二電極層。第一載子注入層配置於第一電極層上。第一載子傳輸層配置於第一載子注入層上，其中第一載子傳輸層的材料包括可交聯材料。發光層配置於第一載子傳輸層上，其中發光層的材料包括具有鈣鈦礦型結晶結構的發光材料。第二載子注入層配置於發光層上。第二電極層配置於第二載子注入層上。
Plasmonic Effects on Bulk Heterojunction Polymer Solar Cells: A Transient Photovoltage and Differential Charging Study
(2017-08-01)
Kok, Soon Yie
;
Hsieh, Zong-Chun
;
Chou, Chun-Hsien
;
Yang, Shun-Shing
;
Chuang, Ming-Kai
Transient photovoltage and differential charging experiments have been carried out to investigate the plasmonic effects in organic photovoltaic devices (OPVs). We observed that the carrier lifetimes became longer after the Au nanoparticles were blended into the OPVs. Additionally, the charge carrier densities also became higher in the bulk of the device. The carrier lifetime, however, usually follows an inverse power relationship with the increasing charge density in OPVs fabricated base on the concept of bulk heterojunctions. Therefore, we conclude that one of the limitations for the plasmonic approaches could be the strong bimolecular recombination.