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检索条件"任意字段=2010 International Conference on Parallel and Distributed Computing and Networks, PDCN 2010"

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Mining and Composition of Emergent Collectives in Mixed Service-Oriented Systems

Mining and Composition of Emergent Collectives in Mixed Serv...

引用

IEEE international conference on E-Commerce Technology Workshops

作者： Daniel Schall Florian Skopik Distributed Systems Group University of Technology Vienna Vienna Austria

Complex service-oriented systems typically span interactions between people and services. Compositions in such systems demand for flexible interaction models. In this work we introduce an approach for discovering experts based on their dynamically changing skills and interests. We discuss human provided services and an approach for managing user preferences and network structures. Experts offer their skills and capabilities as human provided services that can be requested on demand. Our main contributions center around an expert discovery method based on the concept of hubs and authorities in Web-based environments. The presented discovery and interaction approach takes trust-relations and link properties in social networks into account to estimate the hub-expertise of users. Furthermore, we show how our approach supports flexible interactions in mixed service-oriented systems.

关键词： Context Humans Social network services Communities Measurement Receivers Collaboration

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Premptive Job Scheduling with Priorities and Starvation cum Congestion Avoidance in Clusters

Premptive Job Scheduling with Priorities and Starvation cum ...

引用

international conference on Machine Learning and computing

作者： M. Balajee B. Suresh M. Suneetha V. Vasudha Rani G. Veerraju Department of IT GMRIT Rajam India

This paper describes a new policy to schedule parallel jobs on Clusters that may be part of a Computational Grid. This algorithm proposed 3 Job Queues. In each Cluster, some number of resources is assigned to each of the Queue. The 1 st Queue has some jobs which has low expected execution time(EET). The 2 nd Queue has some jobs which has high expected execution time. The 3 rd Queue has jobs which are part of Meta-Job from Computational Grid. In 1 st there is no chance of starvation. But in 2 nd Queue there is a chance of starvation. So this algorithm applied Aging technique to preempt the jobs which has low priority. And the 3 rd Queue is fully dedicated to execute a part of Meta-Jobs only. So here we maintain multiple job Queues which are effectively separate jobs according to their projected execution time for Local Jobs and for part of Meta-Job. Here we preempt jobs by applying Aging Technique. Here we can avoid unnecessary traffic congestion in networks by comparing Expected Execution Time with Total Time for submitting job(s) and receiving result(s) from node(s).

关键词： Job shop scheduling Grid computing Aging Processor scheduling Delay Concurrent computing Telecommunication traffic Traffic control Machine learning Electronic mail

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A Security Decision-Reaction Architecture for Heterogeneous distributed Network

A Security Decision-Reaction Architecture for Heterogeneous ...

引用

international conference on Availability, Reliability and Security, ARES

作者： Christophe Feltus Djamel Khadraoui Jocelyn Aubert PReCISE Research Centre Faculty of Computer Science University of Namur Belgium Centre of IT Innovation Public Research Center Henri Tudor Luxemburg Luxembourg

ISBN: (纸本)9781424458790

The main objective of this paper is to provide a global decision-reaction architectural built on the requirements for a reaction after alert detection mechanisms in the frame of information systems security and more particularly applied to telecom infrastructures security. These infrastructures are distributed in nature, therefore the architecture is elaborated using the multi-agents system that provides the advantages of autonomous and interaction facilities, and has been associated to the ontoBayes model for decision support mechanism. This model helps agents to make decisions according to preference values and is built upon ontology based knowledge sharing, bayesian networks based uncertainty management and influence diagram based decision support. The Multi-Agent System decision-reaction architecture is developed in a distributed perspective and is composed of three basic layers: low level, intermediate level and high level. The proposed approach has been illustrated based on the network architecture for heterogeneous mobile computing developed by the BARWAN project. Accordingly: the Building Area constitutes the low level and aims to be the interface between the main architecture and the targeted infrastructure. The Campus-Area is the intermediate level responsible of correlating the alerts coming from different domains of the infrastructure and to smartly deploy the reaction actions.

关键词： Information security Computer architecture Multiagent systems Information systems Telecommunications Ontologies Bayesian methods Uncertainty Computer network management Knowledge management

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A Region-Based Hierarchical Location Service with Road-Adapted Grids for Vehicular networks

A Region-Based Hierarchical Location Service with Road-Adapt...

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international conference on parallel Processing Workshops (ICPPW)

作者： Guey-Yun Chang Yun-Yu Chen Jang-Ping Sheu Department of Computer Science National Tsing Hua University Hsinchu Taiwan Department of Computer Science and Information Engineering National Central University Jhong Li Taiwan

In VANETs, it is very important to communicate between two vehicles, but how to get the correct position of a vehicle is not easy. Due to vehicles are moving fast, topology in VANETs changes rapidly. As a result, location services processed in VANETs are more difficult than in MANETs. In our thesis, we propose a hierarchical location service system, it provides a low cost and rapid service. First, we select the main arteries to divide network into grids because of there are more vehicles than in normal roads, and then design a mechanism that when vehicles need to send update packets. This mechanism can decrease the number of update packets and still gain correct vehicles' location. Second, we design grids with three levels, the higher the level, the larger the area. Each level stores update packets sent within its area. Vehicles using our system can find the destination vehicle distributedly within a small area; if the target is not within this area, then find within a larger area. Besides, we propose a packets collection method, it can be adjusted with different size of collection area. The simulation results show that our scheme could decrease the number of location update packets effectively, and keep high success rate of location service.

关键词： Vehicles Arteries Roads Servers Protocols Mobile computing Ad hoc networks

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Intra-mobility for Hospital Wireless Sensor networks Based on 6LoWPAN

Intra-mobility for Hospital Wireless Sensor Networks Based o...

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international conference on Wireless and Mobile Communications (ICWMC)

作者： Antonio J. Jara Miguel A. Zamora Antonio F.G. Skarmeta Department of Information and Communications Engineering Computer Science Faculty University of Murcia Murcia Spain

Low-power personal area networks (LoWPANs) are still in its early stage of development, but the range of conceivable usage scenarios is tremendous. The numerous possible applications of Wireless Sensor networks (WSNs) make obvious that mesh and multi-technology topologies will be prevalent in LoWPAN environments and mobility support will be a necessity. Mobility based communication can prolong the lifetime of devices and increase the connectivity between nodes and clusters. Using distributed LoWPANs is possible to sculpt the devices density to cluster around areas of interest, cover large areas, and work more efficiently. The required mobility is heavily dependent on the individual service scenario and the LoWPAN architecture, for that reason in this paper is defined a mobility protocol for clinical environments. This paper presents an intra-mobility protocol for Hospital Wireless Sensor networks based on 6LoWPAN, where we have defined a protocol optimized for our continuous vital signs monitoring architecture. This protocol presents how to exploit the other elements of the architecture with high capacity and resources (6LoWPAN Border Router, gateways etc.) to reduce latency, power consumption and the number of interchanged messages with respect to other solutions such as Mobile IP (MIPv6).

关键词： Protocols Hospitals Mobile communication Wireless sensor networks Mobile computing Security Logic gates

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Prolonging network operation lifetime with new maximum battery capacity routing in wireless mesh network

Prolonging network operation lifetime with new maximum batte...

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international conference on Computer and Automation Engineering, ICCAE

作者： Afsane Saee Arezoomand Mohammadali Pourmina Department of Electronic and Communication Science and Research Branch Islamic Azad University Tehran Iran

ISBN: (纸本)9781424455690

The wireless mesh network is a novel wireless network architecture that supports clients to communicate with different types of networks, Internet etc. It consists of mesh routers and mesh clients. These mesh routers are minimal mobile and mesh clients are totally mobile which operate on batteries. Hence, power consumption becomes an important issue in mesh clients. The protocols of Ad hoc networks can be used in WMNs. But in the paper we only consider the routing algorithm with limited battery energy of each mesh clients. To maximize the lifetime of mesh mobile networks, the power consumption rate of each node must be evenly distributed, it is essential to prolong each individual node (mobile) lifetime since the lack of mobile nodes can result in partitioning of the network, causing interruptions in communications between mobile nodes, and finally the overall transmission power for each connection request must be minimized. These two objectives cannot be satisfied simultaneously due to the NP hardness of the problem so a trade-off between these two conflict optimization objectives is needed. In this article we propose a new metric to find a proper route in wireless Mesh network.

关键词： Batteries Routing Wireless mesh networks Peer to peer computing Mobile communication Energy consumption Ad hoc networks Spine Costs Intelligent transportation systems

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ECC-based distributed Trust Security System for VANET

ECC-based Distributed Trust Security System for VANET

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2010 international conference on Computational Intelligence and Vehicular System (CIVS2010)

作者： Chao Wang,IEEE Senior Member Department of Communication Shanghai University Box 160.No.149,Yanchang Road,Shanghai P.R.China ZhenHua Zhang Department of Communication Shanghai University No.149,Yanchang Road,Shanghai P.R.China Qiang Lin Department of Communication Shanghai University No.149,Yanchang Road,Shanghai P.R.China

Vehicular networks develop rapidly,and the security attacks of VANET were *** we propose an ECC-based distributed trust security system which distributes the function of CA to some nodes in ***,a single node which manages public-key of the whole network can extend to a set of *** the network was formed selforganizationally,malicious nodes can be found and removed from the *** system provides the users a secure and privacy respected communication network,and solve the communication security issues for VANET.

关键词： traffic engineering security distributed trust Vehicular networks ECC

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Content Distribution Technique with in Virtual Organization(VO) based peering CONTENT Delivery Network

Content Distribution Technique with in Virtual Organization(...

引用

international conference on Advanced Communication Technology (ICACT)

作者： Tanjil Hossain Jamil Ahmed Khan Syed Tanvir Fayez Department of Computer Science and Information Technology IUT Gazipur Bangladesh

Content Delivery Network (CDN) is a system where computers networked together across the Internet. Contents (especially large media content) are replicated from the origin server to cache servers scattered over the world in order to deliver content to end users in a reliable and timely manner. Cooperation and coordination among them can solve many problems of a particular CDN and is achieved by Virtual Organization (VO). We tried to define an efficient content distribution technique for VO based CDN which is Similar Content Distribution Technique. Implementing this solution within VO will be able to increase performance by providing higher data transfer rate.

关键词： Network servers Web server distributed computing Australia Delay Content management Disaster management Intelligent networks Computer science Information technology

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Hierarchical Bidirectional Chord

Hierarchical Bidirectional Chord

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international conference on Educational and Information Technology (ICEIT)

作者： Minghui Ji School of Communication and Information Engineering Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781424480333

In peer-to-peer (P2P) networks, how to effective locate data on distributed hash tables is challenging and has attracted much research attention in recent years. Two measurements are usually considered when discussing the effective location of data items: the path length (the hop count for resolving a lookup request on the overlay network) and the latency (the actual time period between the issuing and completion of a lookup). In this paper, we propose a regional lookup algorithm based on super-node (Hierarchical DHT Algorithm) that routes data keys queries by region information and super-node, and keeps the finger tables on two directions to reduce the redundancy of finger tables in original Chord. The lookup process can be easily implemented by keeping only O (log2M) routing information with M regions in the Chord ring at each node. Results from theoretical analysis and simulations show that the improved lookup algorithm achieves higher lookup efficiency and scales well.

关键词： Peer to peer computing Linux Clocks Routing

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Criticality-driven QoS adaptive dynamic resource management for distributed and embedded safety & mission critical systems

Criticality-driven QoS adaptive dynamic resource management ...

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international conference on New Trends in Information and Service Science, NISS

作者： Yi Zhang Wan-dong Cai School of Computer Science and Technology Northwestern Polytechnical University Xi'an Shaanxi China

distributed and embedded safety & mission critical systems (DESMCS) execute in open environments which have different dependability requirements. This paper presents a novel criticality-driven QoS adaptive dynamic resource management architecture, which provides middleware services for QoS- and criticality-based resources allocation and adaptation across heterogeneous computing nodes and communication networks. The architecture presented in this paper overcomes the disadvantages of traditional feedback-based static resource management techniques and provides layered criticality-based resource allocation services. It enables the DESMCS to dynamically react to changing resource demands or resources availability and better resources utilization, improved dependability.

关键词： Resource management Safety Mission critical systems Quality of service Availability Vehicle dynamics Application software Computer architecture Middleware Computer networks

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