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Dynamic self-rescheduling of tasks over a heterogeneous platform

Dynamic self-rescheduling of tasks over a heterogeneous plat...

引用

2008 International Conference on Reconfigurable Computing and FPGAs, ReConFig 2008

作者： Binotto, Alécio P.D. Freitas, Edison P. Götz, Marcelo Pereira, Carlos E. Stork, André Larsson, Tony Fraunhofer IGD / Technische Universität Darmstadt Germany Information Science Computer and Electrical Engineering School Halmstad University Sweden Informatics Institute Federal University of Rio Grande do Sul Brazil Electrical Engineering Department Federal University of Rio Grande do Sul Brazil

ISBN: (纸本)9780769534749

Modern applications require powerful highperformance platforms to deal with many different algorithms that make use of massive calculations. At the same time, low-cost and high-performance specific hardware (e.g., GPU, PPU) are rising and the CPUs turned to multiple cores, characterizing together an interesting and powerful heterogeneous execution platform. Therefore, self-adaptive computing is a potential paradigm for those scenarios as it can provide flexibility to explore the computational resources on heterogeneous cluster attached to a highperformance computer system platform. As the first step towards a run-time reschedule load-balancing framework targeting that kind of platform, application time requirements and its crosscutting behaviour play an important role for task allocation decisions. This paper presents a strategy for self-reallocation of specific tasks, including dynamic created ones, using aspect-oriented paradigms to address non-functional application timing constraints in the design phase. Additionally, as a case study, a special attention on Radar Image Processing will be given in the context of a surveillance system based on Unmanned Aerial Vehicles (UAV). © 2008 IEEE.

关键词： Program processors

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A P2P SOA enabling group collaboration through service composition

A P2P SOA enabling group collaboration through service compo...

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5th International Conference on Pervasive Services, ICPS 2008

作者： Galatopoullos, Demetris G. Kalofonos, Dimitris N. Manolakos, Elias S. Electrical and Computer Engineering Department Northeastern University Boston MA 02115 United States Pervasive Computing Group Nokia Research Center Cambridge Cambridge MA 02142 United States Department of Informatics and Telecommunications University of Athens Illisia Athens 15784 Greece

ISBN: (纸本)9781605581354

The Service-Oriented Architecture (SOA) paradigm was introduced for exposing business processes as services and enabling their interaction and composition over the Internet. The same computing model can potentially be extended to services of personal devices. As personal devices become network-aware their services can be made available (by their owners) to members of trusted peer groups, thus allowing them to compose new distributed collaborative applications. However, dealing with firewall traversals, NATs, mobility and issues of service-level naming and addressing stand in the way of this vision. In this paper we introduce a P2P SOA middleware architecture that addresses such problems of pervasive connectivity without requiring any intermediaries or changes to the service implementations. We present the basic elements of the architecture and the design of a specific instance of it, which enables the P2P service discovery and execution of composite personal services in distributed OSGi containers over JXTA. Copyright 2008 ACM.

关键词： Web services

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Wireless skin temperature sensing patch

Wireless skin temperature sensing patch

引用

2008 IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems, MFI

作者： Mohy-Ud-Din, Zia Sang, Hyo Woo Jung, Hyun Lee Sang, Heon Lee Park, Soo Young Chul, Ho Won Jin, Ho Cho Medical and Biological Department School of Medicine Kyungpook National University Korea Republic of School of Electronic Engineering and Computer Science Kyungpook National University Korea Republic of Department of Computer Control and Electrical Engineering Kyungil University Korea Republic of Department of Medical Informatics School of Medicine Keimyung University Korea Republic of Department of Biomedical Eng. School of Medicine Kyungpook National University Korea Republic of

ISBN: (纸本)9781424421442

Temperature is very important parameter of the human body. By measuring the body temperature early diagnoses of the simple diseases such as fever are possible. In patient suffering from a fever the body temperature has to be measured again and again which is irritating work for the nurses in the hospital. So it is advantageous to make a device which can measure the skin temperature for 24 hours and thus nurses are used for more critical work. This paper focused on measuring of skin temperature of the human body wirelessly for 24 hour. The system used the 434 MHz ISM band frequency to send the signal wirelessly to the receiver. Classic OOK communication is used. ©2008 IEEE.

关键词： Physiology

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Real-time servo control architecture for parallel stabilization and manipulation of tele-operated robots

Real-time servo control architecture for parallel stabilizat...

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2008 International Conference on Automation, Robotics and Control Systems, ARCS 2008

作者： Amanatiadis, A. Papadakis, S.E. Laboratory of Electronics Department of Electrical and Computer Engineering Democritus University of Thrace 12 Vas. Sofias Str GR-67100 Xanthi Greece Division of Computing Systems Department of Industrial Informatics Technological Educational Institution of Kavala GR-65404 Kavala Greece

ISBN: (纸本)9781615677146

This paper presents a control architecture for semi-autonomous tele-operated robots. The architecture is based on two parallel behavior modules: automatic mechanical image stabilization control and remote head posing control. All processes are performed in Linux-based Real-time Operating Systems using open source libraries under GPL license. Detailed behavior is executed through priorities to prevent the computation waste and simultaneous and non-synchronized accesses to servo motors. Experimental results showed that our system is capable of satisfying the hard-real time requirements for the servo control, with great precision. The system has an open modular and scalable architecture with high performance and low cost.

关键词： Stabilization

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Evaluation and benchmark for biological image segmentation

Evaluation and benchmark for biological image segmentation

引用

IEEE International Conference on Image Processing

作者： Elisa Drelie Gelasca Jiyun Byun Boguslaw Obara B.S. Manjunath Center for Bio-Image Informatics Electrical and Computer Engineering Department University of California Santa Barbara USA

This paper describes ongoing work on creating a benchmarking and validation dataset for biological image segmentation. While the primary target is biological images, we believe that the dataset would be of help to researchers working in image segmentation and tracking in general. The motivation for creating this resource comes from the observation that while there are a large number of effective segmentation methods available in the research literature, it is difficult for the application scientists to make an informed choice as to what methods would work for her particular problem. No one single tool exists that is effective on a diverse set of application contexts and different methods have their own strengths and limitations. We describe below three different classes of data, ranging in scale from subcellular to cellular to tissue level images, each of which pose their own set of challenges to image analysis. Of particular value to the image processing researchers is that the data comes with associated ground truth information that can be used to evaluate the effectiveness of different methods. The analysis and evaluation are also integrated into a database framework that is available online at http://***.

关键词： Image segmentation Cells (biology) Image analysis Image databases Retina Image processing Benchmark testing Microscopy Photoreceptors computer vision

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A new MPPT method for Photovoltaic generation systems based on Hill Climbing algorithm

A new MPPT method for Photovoltaic generation systems based ...

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International Conference on electrical Machines, ICEM

作者： Dimosthenis Peftitsis Georgios Adamidis Anastasios Balouktsis Electrical & Computer Engineering Department Democritus University of Thrace Greece Informatics and Telecommunications Department Technological Institute of Serres Greece

This paper presents a new method for MPPT in photovoltaic systems based on "Hill Climbing" algorithm. According to the proposed method cube of slope of power vs. voltage (P-V) curve is calculated in each calculation step. Through this calculation both the direction of photovoltaic's (PV) voltage change and the step size of this change are resulted without making any slope or sign control. Moreover, a way to apply this method in PV systems which are consisted of Ns in series and Np in parallel connection PV arrays with high installed nominal power is proposed. A DC to DC buck-boost converter is used in connection with PV arrays for achieving operation in maximum power point and keeping output voltage constant. The whole system is simulated using Matlab/Simulink and simulation results are presented and analyzed.

关键词： Photovoltaic systems Solar power generation Equations Diodes Temperature Voltage control Analytical models Circuit simulation Mathematical model Solar radiation

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Graph cut segmentation of neuronal structures from transmission electron micrographs

Graph cut segmentation of neuronal structures from transmiss...

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IEEE International Conference on Image Processing

作者： Nhat Vu B. S. Manjunath Center for Bio-image Informatics Department of Electrical and Computer Engineering University of California Santa Barbara CA USA

In many neurophysiological studies, understanding the neuronal circuitry of the brain requires detailed 3D models of the nerve cells and their synapses. Typically, researchers build the 3D models by manually tracing the 2D cross-sectional profiles of the 3D structures from serial electron micrograph (EM) stacks and then construct the models from these 2D contours. While current computer-aided techniques can reduce the tracing time, they often require extensive user interaction. We propose a segmentation framework to extract the 2D profiles that is both fast and requires a minimal amount of user interaction. The framework uses graph cuts to minimize an energy defined over the image intensity and the flux of the intensity gradient field. Furthermore, to correct segmentation errors, our framework allows for efficient and intuitive editing of the initial results.

关键词： Electrons Image segmentation Error correction Biomembranes Image reconstruction Pixel Labeling informatics Circuits Brain modeling

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Cyber-Crime Investigations: Complex Collaborative Decision Making

Cyber-Crime Investigations: Complex Collaborative Decision M...

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International Workshop on Digital Forensics and Incident Analysis (WDFIA)

作者： Peter M. Bednar Vasilios Katos Cheryl Hennell Department of Informatics Lund University Sweden Department of Electrical and Computer Engineering Democritus University of Thrace Greece BT Openreach UK

This paper reports on the challenges computer forensic investigators face in relation to collaborative decision making, communication and *** opportunities, operational environment and modus operandi of a cyber criminal are considered and used to develop the requirements in terms of both skill sets and procedural support a forensics investigator should have in order to respond to the respective threat vectors. As such, we show how a published framework for systemic thinking can be fit for purpose for supporting the collaborative enquiry and decision-making process.

关键词： Collaboration Decision making Law Complexity theory Legal factors computers Internet

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O2DSS: A Framework for Ontology-Based Decision Support Systems in Pervasive Computing Environment

O2DSS: A Framework for Ontology-Based Decision Support Syste...

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Asia International Conference on Modeling & Simulation

作者： Amin Saremi Mostafa Esmaeili Jaafar Habibi Arman Ghaffari Department of Computer Engineering Sharif University of Technology Tehran Iran Department of Electrical and Computer Engineering University of Shahid Beheshti Tehran Iran High Council of Informatics Tehran Iran

Applications in pervasive computing environment exploit information about the context of use, such as the location, tasks and preferences of the user, in order to adapt their behavior in response to changing operating environments and user requirements. Utilizing context with aid of ontology in data and model, decision support systems can provide better and more desirable support to their users. The effects and advantages of exploiting ontology in user modeling and DSS is discussed. We propose a framework of a ontology-based decision support system (O 2 DSS), including ontology in model base, database and their advantages.

关键词： Ontologies Decision support systems Pervasive computing computer vision computer architecture Decision making Predictive models Spread spectrum communication Humans Context modeling

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An efficient synchronization scheme for digital UWB communication systems for biomedical applications

An efficient synchronization scheme for digital UWB communic...

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IEEE Biomedical Circuits and Systems (BIOCAS)

作者： Muhammad Cassim Munshi Jinhua Jiang Yan Xin Tor Sverre Lande Yong Lian Department of Electrical & Computer Engineering National University of Singapore Singapore Department of Informatics Microelectronic Systems Group University of Oslo Norway

Wireless biomedical applications require low power operations for long, uninterrupted durations of use. In order to harness the low power characteristics of Ultra Wideband (UWB) systems, issues involving the synchronization of extremely short pulses have to be resolved as they surface as major bottlenecks of the design of such systems. The situation is particularly adverse in short range communication systems operating in dense indoor environments as employed in the biomedical field. In this paper, we present a simple power saving synchronization scheme extended upon a previously implemented spatial rake receiver structure. This scheme, which uses neither high speed ADCs nor conventional analog correlators, allows for significant reduction in receiver power consumption while achieving quick acquisition in the preamble stage under moderate signal to noise ratio (SNR) conditions, by exploiting favorable cross correlation properties of known Barker sequences. This is illustrated by appropriately adjusting the threshold value of the discrete correlation between received data and chosen sequences.

关键词： Ultra wideband communication Signal to noise ratio Ultra wideband technology Spatial resolution Indoor environments Fading Multipath channels Correlators RAKE receivers Energy consumption

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