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International Conference on computer Supported Cooperative Work in Design

作者： Luciana Pereira de Araujo Carla Diacui M. Berkenbrock Mauro Marcelo Mattos Eric Boeing UDESC Santa Catarina State University Santa Catarina State University UDESC Computer Science Department Graduate Program in Applied Computing Brazil FURB Development and Transference Technology Lab

In this paper we present the use of participatory design in a public health management system, called PRONTO, that is being developed in Brazil. This system involves a partnership between the city hall and the University of Blumenau and it is being developed by the Development Laboratory and Transfer of Technology. The project involves a health network with 64 units of family health, 8 ambulatories and 1 polyclinic. The paper describes the experience in the project phase of the Multidisciplinary Treatment System module and presents the obtained results.

关键词： Collaboration Registers Public healthcare Prototypes Educational institutions Cities and towns

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PAPR reduction in an OFDM system using recursive clipping and filtering technique

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WSEAS Transactions on Communications 2014年第1期13卷 291-297页

作者： Islam, Anamul Ahmed, N. Ahamed, Nizam Uddin Rahman, Matiur Aljunid, S.A. Dept. of Applied Physics and Electronic Engineering University of Rajshahi Bangladesh School of Computer and Communication Engineering University Malaysia Perlis Malaysia Biomedical Engineering Program Mechatronic Engineering University Malaysia Perlis Malaysia College of Computer Science and Information System Najran University Saudi Arabia

An Orthogonal Frequency Division Multiplexing (OFDM) scheme is expected as an efficient technique for next generation wireless communications. However, high Peak to Average Power Ration (PAPR) of OFDM system is the main drawback which degrades the transmitter power efficiency causes poor performance of the system. To reduce PAPR of OFDM signal, several works on clipping technique have been proposed. This paper is incorporated the improvement of the PAPR and Bit Error Rate (BER) performance using clipping method. It has been shown from the result that by employing the recursive clipping and filtering, 11.45 dB of PAPR of original OFDM signal is reduced down to 4.77 dB. Hence, BER is also increased significantly. This research is carried out through MATLAB simulation and gradually measured the effect of PAPR on BER under AWGN channel for 16QAM scheme with 256 points OFDM. Moreover, it is studied the effect of OFDM signal while passing through High Power Amplifier (HPA). Finally, the PAPR reduction technique such as recursive clipping and filtering (RCF) is implemented.

关键词： Orthogonal frequency division multiplexing

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High-order continuum kinetic method for modeling plasma dynamics in phase space

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AIP Conference Proceedings 2014年第1期1639卷 146-149页

作者： G. V. Vogman P. Colella U. Shumlak Applied Science & Technology Program University of California Berkeley Berkeley CA 94720 USA Computational Research Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA and Department of Electrical Engineering & Computer Science University of California Berkeley CA 94720 USA Aerospace & Energetic Research Program University of Washington Seattle WA 98195 USA

Continuum methods offer a high-fidelity means of simulating plasma kinetics. While computationally intensive, these methods are advantageous because they can be cast in conservation-law form, are not susceptible to noise, and can be implemented using high-order numerical methods. Advances in continuum method capabilities for modeling kinetic phenomena in plasmas require the development of validation tools in higher dimensional phase space and an ability to handle non-cartesian geometries. To that end, a new benchmark for validating Vlasov-Poisson simulations in 3D (x,vx,vy) is presented [1]. The benchmark is based on the Dory-Guest-Harris instability and is successfully used to validate a continuum finite volume algorithm. To address challenges associated with non-cartesian geometries, unique features of cylindrical phase space coordinates are described. Preliminary results of continuum kinetic simulations in 4D (r,z,vr,vz) phase space are presented.

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Efficient real-time detection of terahertz pulse radiation by "listening to" photoacoustic generation

Efficient real-time detection of terahertz pulse radiation b...

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Laser science, LS 2014

作者： Chen, Sung-Liang Zhang, Cheng Chang, You-Chia Ok, Jong G. Ling, Tao Mihnev, Momchil T. Norris, Theodore B. Jay Guo, L. Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109 United States Applied Physics Program University of Michigan Ann ArborMI48109 United States Department of Mechanical Engineering University of Michigan Ann ArborMI48109 United States University of Michigan Shanghai Jiao Tong University Joint Institute Shanghai200240 China

We demonstrate real time terahertz detection based on its absorption by carbon nanotubes composite and detection of the generated photoacoustic signal. This method has advantages of real time response, compact size an... 详细信息

ISBN: (纸本)1557522863

关键词： Yarn

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EPC information services with No-SQL datastore for the Internet of Things

EPC information services with No-SQL datastore for the Inter...

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IEEE International Conference on RFID

作者： Tuan Dinh Le Seong Hoon Kim Minh Hoang Nguyen Daeyoung Kim Seung Young Shin Kyung Eun Lee Rodrigo da Rosa Righi Deparment of Computer Science KAIST Daejeon South Korea Samsung Electronics South Korea Graduate Program in Applied Computing Universidade do Vale do Rio dos Sinos São Leopoldo Brazil

With the emergence of the Internet of Things (IoT) vision, RFID technology has attracted more and more interests from many industries. In the EPCglobal standard which standardizes RFID architectural framework and interfaces, the Electronic Product Code Information System (EPCIS) - the repository in the RFID network - plays a pivotal role in storing dynamic and historical RFID trajectory data, well-tailored to supply chain applications. However, in the IoT era, EPCIS should be capable of storing a large amount of realtime and continuous time-series RFID data in a scalable manner. Therefore, in this paper, we analyze the requirements and current design of EPCIS and report current limitations of SQL-based approaches for IoT applications. To cope with these limitations, we explore a NoSQL-based approach for EPCIS in the IoT and propose a column-family-based data model and customization for Cassandra-based EPCIS. Using real-world implementation, we also conduct a performance comparison between MySQL and Cassandra in different deployment scenarios (i.e., physical and virtual machines). As a result, we show the benefits of using Cassandra datastore for EPCIS in the IoT in terms of response time, throughput, and flexibility.

关键词： Radiofrequency identification Data models Indexes Relational databases Standards Containers

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Symmetry-protected mode coupling near normal incidence for narrow-band transmission filtering in a dielectric grating

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Physical Review B 2014年第16期89卷 165111-165111页

作者： J. M. Foley S. M. Young J. D. Phillips Applied Physics Program University of Michigan Ann Arbor Michigan 48109 USA Electrical Engineering and Computer Science Department University of Michigan Ann Arbor Michigan 48109 USA Physics Department University of Michigan Ann Arbor Michigan 48109 USA

A narrow-band transmission filter is demonstrated near normal incidence that operates through relaxation of supported-mode selection rules and is explained in the context of group theory. We calculated the transverse magnetic and transverse electric dispersion relations of a dielectric grating in the subwavelength and near-wavelength region using finite element modal analysis and determine the modes' corresponding irreducible representations. Coupling to select transverse magnetic modes at normal incidence is optimized to yield broadband high reflectance that acts as the background for the transmission filter. While some modes couple at normal incidence, others are shown to remain inaccessible due to symmetry mismatch. Away from normal incidence, the reduced symmetry relaxes the selection rules, enabling weak coupling between the incident field and these symmetry-protected modes. This weak coupling produces narrow transmission bands within the opaque background. Furthermore, by choosing the plane of incidence to include or exclude the grating periodicity, we show that orthogonal mode sets can independently be selected to couple to the incident light, yielding separate transmission bands. This spectral filtering is experimentally demonstrated with a suspended silicon grating in the infrared spectrum (7–14μm), which agrees well with simulated transmittance spectra and modal analysis.

关键词： GROUP theory MODAL analysis DIELECTRICS SYMMETRIC functions FINITE element method

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Integrated 4H-silicon carbide diode bridge rectifier for high temperature (773 K) environment

Integrated 4H-silicon carbide diode bridge rectifier for hig...

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European Conference on Solid-State Device Research (ESSDERC)

作者： Shiqian Shao Wei-Cheng Lien Ayden Maralani Albert P. Pisano Department of Mechanical Engineering University of California at Berkeley USA Applied Science and Technology Program University of California at Berkeley USA Department of Electrical Engineering and Computer Science University of California at Berkeley USA Jacobs School of Engineering University of California at San Diego USA

In this paper, we demonstrate the stable operation of integrated 4H-silicon carbide (SiC) diode bridge rectifier circuits at high temperature up to 773 K for the first time. The turn-on voltages of the fabricated 4H-SiC pn diode are 2.6 V and 1.4 V at room temperature and 773 K, respectively, with a low shifting rate of 2.2 mV/K. The integration of the 4H-SiC diode bridge rectifier circuit was achieved with contact and interconnect metallization technique for high temperature. The demonstration of the extremely high temperature operation of the integrated 4H-SiC diode bridge rectifier circuits brings promising applications in harsh environment electronics and sensing.

关键词： Bridge circuits Rectifiers Silicon carbide Temperature sensors Plasma temperature Temperature measurement Fabrication

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Development of Rapid Chemical Oxygen Demand Analysis Using Ozone as Oxidizing Agent

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Energy Procedia 2014年 50卷 711-718页

作者： Nipon Pisutpaisal Ubonrat Sirisukpoca Department of Agro-Industrial Food and Environment Technology Faculty of Applied Science King Mongkut's University of Technology North Bangkok 10800 Thailand The Biosensor and Bioelectronics Technology Centre King Mongkut's University of Technology North Bangkok 10800 Thailand Program of Computer Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand

A new and environmental friendly method for the rapid determination of Chemical Oxygen Demand (COD) as a measure of organic pollution was developed. Ozone was used as an oxidizing agent in the current method. Experiment was setup in 500 mL glass bottle containing 390 mL distilled water and 10 mL wastewater sample at 31 °C. The extent of dissolved ozone reacted with the wastewater sample was monitored through an ozone sensor. Reaction time of 60 seconds achieved good linear correlation between the extent of ozone degradation and the wastewater concentrations. The results showed that the rate and extent of ozone degradation are linearly proportional to the initial COD concentrations in range of 0-80 mg/L for the glucose- containing distilled water and canteen wastewater.

关键词： COD chemical oxygen demand ozone water quality analysis

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Production of Hydrogen and Methane from Banana Peel by Two Phase Anaerobic Fermentation

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Energy Procedia 2014年 50卷 702-710页

作者： Chananchida Nathoa Ubonrat Sirisukpoca Nipon Pisutpaisal Department of Agro-Industrial Food and Environmental Technology Faculty of Applied Science King Mongkut's University of Technology North Bangkok Bangkok 10800 Thailand Program of Computer Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand The Biosensor and Bioelectronics Technology Centre King Mongkut's University of Technology Northn Bangkok 10800 Thailand

A two phase anaerobic digestion of banana peel is an attractive process for producing hydrogen and methane. Comparative performance and total energy recovery between two phase process (sequential hydrogen and methane fermentation) and one phase process (methane fermentation) in were evaluated in batch reactor under mesophilic incubation at varying ratios of feedstock to microbial inoculum (F/M) ranging from 2.5 – 10. F/M ratios influence biogas yield, production rate, and potential. Best performance of one phase methane fermentation was observed at F/M of 5.0. At this condition, methane yield, production rate, and potential were 251.3 mL g -1 VS, 2.05 mL h -1 , and 352.9 mL, respectively. Hydrogen and methane yields of 209.9 and 284.1 mL g -1 VS mL g -1 VS were achieved at F/M of 5.0 in two stage process. Acetic acid is the main volatile fatty acids (VFAs) produced in the hydrogen fermentation stage. Little amount of VFAs were accumulated in methane fermentation in both stage processes. Total energy recovery in two stage process is higher than that in one stage by 81%. This work demonstrated two phase achieved a better performance than one phase fermentation of banana peel.

关键词： Hydorogen methane banana peel fermentation two phase process

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Biological Hydrogen and Methane Production in from Food Waste in Two-stage CSTR

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Energy Procedia 2014年 50卷 719-722页

作者： Nipon Pisutpaisal Chananchida Nathao Ubonrat Sirisukpoka Department of Agro-Industrial Food and Environmental Technology Faculty of Applied Science King Mongkut's University of Technology North Bangkok 10800 Thailand The Biosensor and Bioelectronics Technology Centre King Mongkut's University of Technology North Bangkok 10800 Thailand Program of Computer Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand

Total energy recovery from food waste fermentation in a two-stage 5-L CSTR system, in which hydrogen and methane production were sequential setup, was evaluated. The first –stage hydrogen, and the second-stage methane were produced under mesophilic fermentation with the initial pH 6 and 7; and hydraulic retention time of 12 and 24 h, respectively. The results showed that the hydrogen and methane yields were 292.7 and 391.6 mL g -1 VS at the steady stage operation. The methane yield in the one-stage from food waste fermentation were 364.3 mL g -1 VS. The total energy recovery from two-stage process was 6.5x10 -2 kW-h, while that from one-stage process was 4.7x10 -2 kW-h. The research study found that the total energy recovery from a two-stage fermentation process consisting of hydrogen and methane production potential high energy than one-stage methane production. Clostridium sp. and Lactobacillus are dominant bacteria in the hydrogen fermentation under the steady state operation.

关键词： Hydrogen methane food waste fermentation two-stage CSTR.

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