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检索条件"任意字段=5th IEEE International Conference on Distributed Computing in Sensor Systems"

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Enabling autonomic meta-scheduling in Grid Environments

Enabling autonomic meta-scheduling in Grid Environments

引用

5th international conference on Autonomic computing, ICAC 2008

作者： Liu, Yanbin Sadjadi, S. Masoud Fong, Liana Rodero, Ivan Villegas, David Kalayci, Selim Bobroff, Norman Martinez, Juan Carlos IBM Watson Research Center Hawthorne NY United States Florida International University Miami FL United States Barcelona Supercomputing Center Barcelona Spain

ISBN: (纸本)9780769531755

Grid computing supports workload execution on computing resources that are shared across a set of collaborative organizations. At the core of workload management for Grid computing is a software component, called meta-scheduler or Grid resource broker, that provides a virtual layer on top of heterogeneous Grid middleware, schedulers, and resources. Meta-schedulers typically enable end-users and applications to compete over distributed shared resources through the use of one or more instances of the same meta-scheduler, in a, centralized or distributed manner, respectively. We propose an approach to enabling autonomic meta-scheduling through the use of a new communication protocol that -if adopted by different meta-schedulers or by the applications using them-can improve the workload execution while avoiding potential chaos, which can be resulted from blind competition over resources. this can be made possible by allowing the metaschedulers and/or their applications to engage in a process to negotiate their roles (e.g., consumer, provider, or both), scheduling policies, service-level agreement, etc. To show the feasibility of our approach, we developed a prototype that enables some preliminary autonomic management among three different meta-schedulers, namely, GridWay, eNANOS, and TDWB. © 2008 ieee.

关键词： Grid computing

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A novel cluster-based routing protocol with Extending Lifetime for wireless sensor networks

A novel cluster-based routing protocol with Extending Lifeti...

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5th ieee/IFIP international conference on Wireless and Optical Communications Networks

作者： Lotf, Jalil Jabari Bonab, Mehdi Nozad Khorsandi, Siavash Islamic Azad Univ Dept Comp Engn Ahar Branch Tehran Iran Islamic Azad Univ Dept Comp Engn Marand Branch Tehran Iran Amirkabir Univ Technol Dept Comp Engn Tehran Iran

ISBN: (纸本)9781424419791

Over the recent years, one of the most important problems in wireless sensor network is to develop a routing protocol that has energy efficiency. Since the power of the sensor nodes is limited, conserving energy and network life is a critical issue in wireless sensor network. In this paper, first we propose an ELCH (Extending Lifetime of Cluster Head) routing protocol that has self-configuration and hierarchal routing properties. It reforms the existing routing protocols in several aspects and constructs clusters on the basis of radio radius and the number of cluster members. In this method, the clusters in the network are equally distributed. We also suggest a novel clustering algorithm for sensor networks, which lets sensors vote for their neighbors in order to elect suitable cluster heads.

关键词： wireless sensor network routing clustering

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Xobe sensor Networks: Integrating XML in sensor network programming

<i>Xobe Sensor Networks</i>: Integrating XML in sensor netwo...

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5th international conference on Networked Sensing systems

作者： Hoeller, Nils Reinke, Christoph Groppe, Sven Linnemann, Volker Med Univ Lubeck Inst Informat Syst D-23538 Lubeck Germany

ISBN: (纸本)9784907764319

Communication In and with sensor networks often lacks of exchangeability. Furthermore handling communication data formats during sensor node programming is often complex and programming errors can result in unstable programs. In this poster we introduce the easy to use programming framework XOBE(sensorNetwork), which provides the direct use of XML in a sensor node programming language, while ensuring stable and space-, time- and energy-efficient programs handling XML data.

关键词： XML

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the (k,l) coredian tree for ad hoc networks

The (k,l) coredian tree for ad hoc networks

引用

28th international conference on distributed computing systems Workshops, ICDCS Workshops 2008

作者： Dvir, Amit Segal, Michael Department of Communication Systems Engineering Ben Gurion University of the Negev Israel

ISBN: (纸本)9780769531731

In this paper, we present new efficient strategy for constructing a wireless tree network containing n nodes of diameter Δ while satisfying the QoS requirements such as bandwidth and delay. Given a tree network T, a coredian path is a path in T that minimizes the centdian function, a k-coredian tree is a subtree of T with k leaves that minimizes the centdian function, and a (k, l)-coredian tree is a subtree of T with k leaves and diameter l at most that minimizes the centdian function. the (k, l)-coredian tree can serve as a backbone for a network, where intermediate nodes belong to the backbone and the leaves serve as the heads of the clusters covering the rest of the network. We show that a coredian path can be constructed at O(Δ) time with O(n) messages and a k-coredian tree can be constructed at O(k) time with O(kn) messages. While a (k, l)-coredian tree can be constructed at O(n2) time with O(n2) messages. A simulation is presented for various values of n and k. © 2008 ieee.

关键词： sensor networks

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three-Dimensional Shape Capture Sheet Using distributed Six-Axis sensors

Three-Dimensional Shape Capture Sheet Using Distributed Six-...

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5th international conference on Networked Sensing systems

作者： Hoshi, Takayuki Shinoda, Hiroyuki Univ Tokyo Tokyo 1138654 Japan

ISBN: (纸本)9784907764319

We introduce a novel sensing device named "three-dimensional capture sheet (3DCS)." the cloth-like sheet measures its own 3D shape with no external equipment. It has many potential applications such as 3D modeling, size and shape measurement, wearable motion capture, tactile sensor, and so on. It consists of a lattice structure inside of the sheet, and each link of the structure has a sensor chip consisting of a triaxial accelerometer and a triaxial magnetometer. the sensor chip measures the gravity and the Earth's magnetic field to obtain the link posture. After all the link postures are obtained, the whole shape of the sheet is reconstructed by combining them. Additionally, owing to redundancy of the problem, the estimation error (caused by random noise, a distorted magnetic field, and so on) can be corrected. the feasibility and stability of the shape estimation algorithm are confirmed through simulations, and the prototype is presented.

关键词： sensor network Flexible sensing device 3D shape Gravity Earth's magnetic field

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An online bandwidth scheduling algorithm for distributed control systems with multirate control loops

An online bandwidth scheduling algorithm for distributed con...

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5th international conference on Informatics in Control, Automation and Robotics

作者： Kanchi, Saroja Pimentel, Juan Kettering Univ Dept Comp Sci Flint MI 48504 USA Kettering Univ Dept Elect & Comp Engn Flint MI 48504 USA

ISBN: (纸本)9789898111302

In this paper, we present an online scheduling algorithm for communication in a distributed control system. the packet size of the communication varies for each execution of the loop within certain bounds. We consider systems with closed loops that restart immediately after the completion of an execution. Our algorithm is based on priority of the loop and size of the communication packet. We demonstrate through simulation that our algorithm generates a feasible schedule that minimizes average control delay over all the loops. Our simulations demonstrate that this online schedule reduces average delay significantly compared to a-priori schedules for distributed control systems. We demonstrate that bandwidth utilization is more efficient in case of online scheduling.

关键词： control systems control loops scheduling distributed systems

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LOCALIZATION OF TAMPERING IN CONTRAST AND BRIGHTNESS ADJUSTED IMAGES USING distributed SOURCE CODING AND EXPECTATION MAXIMIZATION

LOCALIZATION OF TAMPERING IN CONTRAST AND BRIGHTNESS ADJUSTE...

引用

15th ieee international conference on Image Processing (ICIP 2008)

作者： Lin, Yao-Chung Varodayan, David Fink, Torsten Bellers, Erwin Girod, Bernd Stanford Univ Informat Syst Lab Stanford CA 94305 USA TriMedia Ctr Excellence NXP Semiconductors San Jose CA 95131 USA

ISBN: (纸本)9781424417650

Media authentication and tampering localization are important in content delivery via untrusted intermediaries, such as peer-to-peer (P2P) file sharing. Many differently encoded versions of a media file might exist. Our previous work applied distributed source coding to authenticate the legitimate diversity of encoded images and also localize the tampered regions in an inauthentic image. the authentication/localization decoder was supplied with a Slepian-Wolf encoded image projection as authentication data. We extend our scheme to localize tampering in contrast and brightness adjusted images using an Expectation Maximization algorithm at the decoder. Experimental results demonstrate that tampered image blocks can be identified with high probability using data of only a few hundred bytes for a 512x512 image.

关键词： Image authentication tampering localization distributed source coding Expectation Maximization

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Adaptive Buffer Management for Efficient Code Dissemination in Multi-Application Wireless sensor Networks

Adaptive Buffer Management for Efficient Code Dissemination ...

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5th international conference on Embedded and Ubiquitous computing

作者： Li, Weijia Du, Yu Zhang, Youtao Childers, Bruce Zhou, Ping Yang, Jun Univ Pittsburgh Dept Comp Sci Pittsburgh PA 15260 USA Univ Pittsburgh Dept Elect & Comp Engn Pittsburgh PA 15261 USA

ISBN: (纸本)9780769534923

Future wireless sensor networks (WSNs) are projected to run multiple applications in the same network infrastructure. While such multi-application WSNs (MA-WSNs) are economically more efficient and adapt better to the changing environments than traditional single-application WSNs, they usually require frequent code redistribution on wireless sensors, making it critical to design energy efficient post-deployment code dissemination protocols in MA-WSNs. Different applications in MA-WSNs often share some common code segments. therefore when there is a need to to disseminate a new, application front the sink node, it is possible to disseminate its shared code segments from peer sensors instead of disseminating everything from the sink node. While dissemination protocols have been proposed to handle code of each single type. it is challenging to achieve energy efficiency when the code contains both types and needs simultaneous dissemination. In this paper we utilize an adaptive buffer management approach to achieve efficient code dissemination in MA-WSNs. Our experimental results show that adaptive buffer management can reduce the completion time and the message overhead up to 10% and 20% respectively.

关键词： Energy efficiency

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An energy-efficient query processing algorithm for wireless sensor networks

引用

5th international conference on Ubiquitous Intelligence and computing

作者： Sun, Jun-Zhao Univ Oulu Elect & Informat Engn Dept Acad Finland Oulu 90014 Finland

ISBN: (纸本)9783540692928

sensor networks have recently attracted significant attention for many military and civil applications, such as environment monitoring, target tracking, and surveillance. A high-level abstraction of sensor networks forms the distributed database view, in which query is adopted to retrieve data from the network. sensor nodes have limited energy resources and their functionality continues until their energy drains. therefore, query for sensor networks should be wisely designed to extend the lifetime of sensors. this paper presents a query optimization method based on user-specified accuracy item for wireless sensor networks. When issuing a query, user may specify a value/time accuracy constraint according to which an optimized query plan can be created to minimize the energy consumption. At each single sensor node, instead of direct delivery of each reading, algorithms are proposed to reduce both data sensing and data transmission. the performance of the proposed algorithms shows that the proposed methods can achieve better performance than without pet-forming the optimization.

关键词： sensor nodes

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Experimental method of MIS measurement of an electrolytic cell with a passive wireless sensor

Experimental method of MIS measurement of an electrolytic ce...

引用

2008 5th international conference on Electrical Engineering, computing Science and Automatic Control, CCE 2008

作者： Rodarte, G. Jesús Rosell, Javier Bragos, Ramon Department of Electronic Engineering University Polytechnic of Catalonia Barcelona Spain

ISBN: (纸本)9781424424993

Is presented a three coil system, with a passive wireless sensor, as an interface for a commercial Network. the objective of this experiment is to achieve that the system measures the impedances of electrolytic solutions using the Magnetic Impedance Spectroscopy method. the interface is based on planar coils over a laminated printed circuit board;one of the planar coil acts as transmission antenna, another one is inside the electrolytic cell and the last acts as a receiver antenna. the receiver is positioned and oriented of such form that its plane is perpendicular to the plane of the transmitting antenna in order to minimize the induced voltage due to the transmission antenna. the inductive-capacitive passive remote sensor circuit consists of a square planar coil in parallel with an inter-digital electrode with a capacitance of 18 pF. It is oriented with an angle of 45 respect to the plane of the transmitting coil. the performance measurements show a good correlation between the measured and calculated induced voltages on the receiver. We measured three different electrolytic solutions inside the cell with different ion concentrations. © 2008 ieee.

关键词： Capacitive sensors

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