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检索条件"任意字段=6th IEEE International Conference on Distributed Computing in Sensor Systems"

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Efficient Data Aggregation in Multi-hop Wireless sensor Networks Under Physical Interference Model

Efficient Data Aggregation in Multi-hop Wireless Sensor Netw...

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6th international conference on Mobile Adhoc and sensor systems

作者： Li, Xiang-Yang Xu, XiaoHua Wang, ShiGuang Tang, ShaoJie Dai, GuoJun Zhao, JiZhong Qi, Yong Hangzhou Dianzi Univ Inst Comp Applicat Tech Hangzhou Zhejiang Peoples R China IIT Dept Comp Sci Chicago IL 60616 USA Xi An Jiao Tong Univ Sch Sci & Technol Xian Peoples R China

ISBN: (纸本)9781424451142

Efficient aggregation of data collected by sensors is crucial for a successful application of wireless sensor networks (WSNs). Both minimizing the energy cost and reducing the time duration (or called latency) of data aggregation have been extensively studied for WSNs. Algorithms with theoretical performance guarantees are only known under the protocol interference model, or graph-based interference models generally. In this paper, we study the problem of designing time efficient aggregation algorithm under the physical interference model. To the best of our knowledge, no algorithms with theoretical performance guarantees are known for this problem in the literature. We propose an efficient algorithm that produces a data aggregation tree and a collision-free aggregation schedule. We theoretically prove that the latency of our aggregation schedule is bounded by O(R+Delta) time-slots. Here R is the network radius and Delta is the maximum node degree in the communication graph of the original network. In addition, we derive the lower-bound of latency for any aggregation scheduling algorithm under the physical interference model. We show that the latency achieved by our algorithm asymptotically matches the lower-bound for random wireless networks. Our extensive simulation results corroborate our theoretical analysis.

关键词： Wireless sensor networks aggregation scheduling physical interference model

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Modeling Situation-Aware Ambient Assisted Living systems for Eldercare

Modeling Situation-Aware Ambient Assisted Living Systems for...

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6th international conference on Information Technology - New Generations (ITNG 2009)

作者： Kurschl, Werner Mitsch, Stefan Schoenboeck, Johannes Upper Austria Univ Appl Sci Sch Informat Commun & Media Dept Software Engn Softwarepk 11 A-4232 Hagenberg Austria Upper Austria Univ Appl Sci Res Ctr Hagenberg A-4232 Hagenberg Austria

ISBN: (纸本)9781424437702

the development of ambient assisted living (AAL) systems, which are tailored to health or elder care, requires specific methods and tools. AAL systems make often use of wireless sensor networks, machine learning algorithms and sensory devices. Since wireless sensor networks and their sensors are inhomogeneous, it became apparent that such systems need to cope with different hardware platforms, different programming languages, unreliable wireless communication, energy constraints, data analysis algorithms, recognition of situations, and deployment options. Developers to date tend to use a bottom-up approach: hardware components dictate the development of AAL systems and thereby restrict the range of use cases that can be realized;domain experts by contrast would prefer a top-down approach and model the system's functionality independently from the hardware platform. Currently available software development environments and tools do not adequately support domain experts and developers to accomplish these tasks efficiently. this paper presents methods that support domain experts in their top-down approach, as well as technically experienced developers in their bottom-up approach. the implemented tools enable a model-driven software development process (from plalform-independent modeling to generating AAL application code) and thus facilitate programming AAL systems.

关键词： AAL MDSD Wireless sensor Networks

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Wireless Line sensor Network for distributed Visual Surveillance

Wireless Line Sensor Network for Distributed Visual Surveill...

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6th ACM international Symposium on Performance Evaluation of Wireless Ad-Hoc, sensor, and Ubiquitous Networks

作者： Chitnis, Mangesh Liang, Yao Zheng, Jiang Yu Pagano, Paolo Lipari, Giuseppe Scuola Super Sant Anna Pisa Italy

ISBN: (纸本)9781605586182

Wireless sensor networks (WSNs) play a crucial role in visual surveillance for automatic object detection, such as real-time traffic monitoring, vehicle parking control, intrusion detection, and so on. these online surveillance applications require efficient computation and distribution of complex image data over the wireless camera network with high reliability and detection rate in real time Traditionally, such applications make use of camera modules capturing a flow of two dimensional images through time. the resulting huge amount of image data impose severe requirements on the resource constrained WSN nodes which need to store, process and deliver the image data or results within a certain deadline In this paper we present a WSN framework based on line sensor architecture capable of capturing a continuous stream of temporal one dimensional image (line image) the associated one dimensional image processing algorithms are able to achieve significantly faster processing results with much less storage and bandwidth requirement while conserving the node energy. Moreover, the different operating modes offered by the proposed WSN framework provide the end user with different tradeoff in terms of node computation versus communication bandwidth efficiency Our framework is Illustrated through a testbed using ieee 802 154 communication stack and a real-time operating system along with one dimensional image processing the proposed line sensor based WSN architecture can also be a desirable solution to broader multimedia based WSN systems.

关键词： Wireless sensor Network Line sensor ieee 802.15.4 Real time Operating System Multimedia Image Processing

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Using Service Oriented Architecture in a Generic Virtual Power Plant

Using Service Oriented Architecture in a Generic Virtual Pow...

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6th international conference on Information Technology - New Generations (ITNG 2009)

作者： Andersen, Peter B. Poulsen, Bjarne Traeholt, Chresten Ostergaard, Jacob Tech Univ Denmark Ctr Elect Technol Lyngby Denmark Tech Univ Denmark Dept Informat & Math Modeling Lyngby Denmark

ISBN: (纸本)9781424437702

the purpose of this paper is to find and describe a suitable software framework that can be used to help implement the concept of a Generic Virtual Power Plant in the future power system. the Generic Virtual Power Plant concept, along with the utilization of distributed energy resources, has many interesting properties that can influence the future shape of power markets. the concept holds many promises including cheaper power to the consumer, a more flexible and responsive power production and the support of a more environment-friendly development. In order to realize a software solution supporting the Generic Virtual Power Plant, an array of different software design principles, patterns and architectures must be applied Especially Service Oriented Architecture (SOA) can aid in implementing the Generic Virtual Power Plant. An analysis of the Nordic power market has been carried out in order to identify potential issues and barriers, henceforth mentioned as challenges, connected with the introduction of the Generic Virtual Power Plant concept.

关键词： distributed Energy Resources distributed systems Software Architecture Web Services

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Dynamic Integration of Zigbee Devices into Residential Gateways for Ubiquitous Home Services

Dynamic Integration of Zigbee Devices into Residential Gatew...

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6th international conference on Ubiquitous Intelligence and computing

作者： Ha, Young-Guk Konkuk Univ Dept Comp Sci & Engn Seoul South Korea

ISBN: (纸本)9783642028298

In recent years, Zigbee becomes one of the most promising protocols for ubiquitous networking. So, it would be essential that residential gateways can effectively interoperate with Zigbee-enabled ubiquitous devices such as wireless sensors and digital appliances to provide ubiquitous home services. In this paper, I design and implement an effective architecture for dynamic integration of Zigbee devices into OSGi-based residential gateways, where ad hoc Zigbee devices are represented as device proxy services. And such proxy services can be automatically downloaded, installed and registered to the OSGi service registry by the dynamic device integration manager on the corresponding devices' joining the Zigbee network. thus, ubiquitous home service applications can discover proxy services for the required Zigbee devices, and access the devices with the common proxy service interfaces without concerning the specific device access protocols and libraries.

关键词： Ubiquitous service infrastructure Zigbee device ubiquitous sensor residential gateway OSGi service framework

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PIAX: Toward a Framework for sensor Overlay Network

PIAX: Toward a Framework for Sensor Overlay Network

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Consumer Communications and Networking conference, CCNC ieee

作者： Yuuichi Teranishi Graduate School of Information Science and Technology Osaka University Japan

In this paper, requirements and technologies for realizing sensor overlay networks are introduced. sensor overlay networks should provide distributed data fusion mechanism, i.e. in-network computing feature, for effective computing on distributed sensors. sensor overlay networks should also have scalability, maintainability and sustainability. To treat such requirements, we have developed an open source framework called 'PIAX'. the overview of PIAX and its technologies to treat sensor overlay networks are described in this paper.

关键词： Network servers Intelligent sensors Peer to peer computing sensor fusion sensor phenomena and characterization Computer networks distributed computing Costs Bandwidth Information science

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A declarative approach to a user-centric markup language for location-based services 09

A declarative approach to a user-centric markup language for...

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6th international conference on Mobile Technology, Application and systems, Mobility '09

作者： Martens, Johannes Bareth, Ulrich Ludwig-Maximilians-Universität München Institute for Computer Science Mobile and Distributed Systems Group Munich Germany

ISBN: (纸本)9781605585369

Location-based Services are gaining more and more users and are available on a broad set of mobile devices. Due to their complexity such services are currently only provided by large organizations that use their own proprietary specifications thus leaving the full potential untapped. As seen during the development of the World Wide Web a tremendous growth can be achieved by enabling end-users to create services on their own. In this paper we present a platform independent markup language comprising a tool box of standard functions allowing end-users to easily design and exchange innovative location-based services. Besides its simplicity it also enables larger organizations to describe more sophisticated location-based services and run them on different platforms. the language supports event based triggers, like entering a zone, as well as temporal constraints, flow control and stateful services. the created code is human readable thus its executed actions are completely transparent to the user. It is interpreted by a generic parser on the mobile device managing the positioning process and performing actions like notifying the user or executing 3rd party applications. Copyright © 2009 ACM.

关键词： Location based services

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Tracking Concept Drift of Software Projects Using Defect Prediction Quality

Tracking Concept Drift of Software Projects Using Defect Pre...

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6th ieee international Working conference on Mining Software Repositories

作者： Ekanayake, Jayalath Tappolet, Jonas Gall, Harald C. Bernstein, Abraham Univ Zurich Dept Informat Dynam & Distributed Syst Grp CH-8006 Zurich Switzerland Univ Zurich Dept Informat Software Evolut & Architecture Lab CH-8006 Zurich Switzerland

ISBN: (纸本)9781424434930

Defect prediction is an important task in the mining of software repositories, but the quality of predictions varies strongly within and across software projects. In this paper we investigate the reasons why the prediction quality is so fluctuating due to the altering nature of the bug (or defect) fixing process. therefore, we adopt the notion of a concept drift, which denotes that the defect prediction model has become unsuitable as set of influencing features has changed - usually due to a change in the underlying bug generation process (i.e., the concept). We explore four open source projects (Eclipse, OpenOffice, Netbeans and Mozilla) and construct file-level and project-level features for each of them from their respective CVS and Bugzilla repositories. We then use this data to build defect prediction models and visualize the prediction quality along the time axis. these visualizations allow us to identify concept drifts and - as a consequence - phases of stability and instability expressed in the level of defect prediction quality. Further, we identify those project features, which are influencing the defect prediction quality using both a tree induction-algorithm and a linear regression model. Our experiments uncover that software systems are subject to considerable concept drifts in their evolution history. Specifically, we observe that the change in number of authors editing a file and the number of defects fixed by them contribute to a project's concept drift and therefore influence the defect prediction quality. Our findings suggest that project managers using defect prediction models for decision making should be aware of the actual phase of stability or instability due to a potential concept drift.

关键词： Defects

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A SOA based debris flow monitoring system Architecture and proof-of-concept implementation

A SOA based debris flow monitoring system Architecture and p...

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17th international conference on Geoinformatics

作者： Chung, Lan-Kun Fang, Yao-Min Chang, Yin-Huei Chou, Tien-Yin Lee, Bing Jean Yin, Hsiao-Yuen Baranski, Bastian Feng Chia Univ Geog Informat Syst Res Ctr Taichung 40724 Taiwan Soil & Water Conservat Bur Slopeland Management Sect Taichung Taiwan Univ Munster Inst Geoinformat Munster Germany

ISBN: (纸本)9781424445622

Taiwan is located at the collision boundary of the Philippine sea plate and the Eurasian plate. the mountain terrain is precipitous and the region, on the whole, is characterized by fragile rocks and frequent seismic activity. In addition, the concentrated torrential rainfall brought by typhoons cause extensive disasters, debris flow, the most serious disaster caused by torrential rainfall, lead to very heavy casualties in recent years. there are 17 fixed debris flow monitoring stations and 2 mobile stations deployed in Taiwan. However, the whole architecture was designed in late 2000 and implemented by traditional and proprietary methodologies. Hence, several interoperability issues have been unveiled in the recent years when the needs of interoperability increased. In this study, we propose a whole new and open standards based debris flow monitoring architecture following the Service Oriented Architecture (SOA) paradigm. Relevant Open Geospatial Consortium (OGC) standards (for example Web Processing Service, WPS specification and sensor Web Enablement, SWE technologies) and advancements from Grid computing where lead into the proposed architecture. the use of open standards and distributed computing technologies in the proposed architecture enables heterogeneous resources (data, processing and computing power) interoperability. this study also implements an OGC WPS Grid Processing Profile that was developed in the OGC Web Services, Phase 6 (OWS-6) initiative of the OGC Interoperability Program.

关键词： Debris Flow Service Oriented Architecture Spatial Data Infrastructure Open Geospatial Consortium Web Processing Servic sensor Web Enablement Grid computing

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Quality aware query scheduling in wireless sensor networks 09

Quality aware query scheduling in wireless sensor networks

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6th international Workshop on Data Management for sensor Networks, DMSN'09 - in conjunction with the 35th international conference on Very Large Data Bases

作者： Wu, Hejun Luo, Qiong Li, Jianjun Labrinidis, Alexandros Department of Computer Science Sun Yat-sen University China Department of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong School of Computer Science and Technology Huazhong University of Science and Technology China Department of Computer Science University of Pittsburgh United States

ISBN: (纸本)9781605587776

We study query scheduling in Wireless sensor Networks (WSNs) with a focus on two important metrics: Quality of Service (QoS) and Quality of Data (QoD). the motivation comes from our observation that most WSN scheduling techniques ignore the quality requirements of queries. As a result, they are inefficient or inapplicable to quite a few applications that have different quality requirements. In this paper, we propose a distributed Quality Aware Scheduling (QAS) framework to address this problem. QAS works on top of existing quality-unaware query scheduling protocols and allows individual users to specify their QoS and QoD requirements on their queries. Given these quality requirements, QAS determines the target qualities to be provided in scheduling and the execution order of these queries so as to maximize the total system profit. Our preliminary results show that QAS significantly outperforms the baseline scheduling algorithms in terms of system profit. Copyright © 2009 ACM.

关键词： Wireless sensor networks

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