High level context recognition and situation detection are enabling technologies for unobtrusive mobile computingsystems. Significant progress has been made in processing and managing context information, leading to ...
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ISBN:
(纸本)9781424477425
High level context recognition and situation detection are enabling technologies for unobtrusive mobile computingsystems. Significant progress has been made in processing and managing context information, leading to sophisticated frameworks, middlewares, and algorithms. Despite great improvements, context aware systems still require a significantly increased recognition accuracy for high-level context information on uncertain sensor data to enable the robust execution of context-aware applications. Recently Adaptable Pervasive Work-flows (APF)s have been presented as innovative programming paradigm for mobile context-aware applications. We propose a novel Flow Context System (FlowCon) that builds upon APFs. FlowCon uses structural information from the APF to increase accuracy of uncertain high-level context information up to 49%. This way we make an important step to enable robust execution of mobile context-aware applications.
Cloud computing is a development and integration result of distributed processing, parallel processing and grid computing technologies. It helps the enterprise switch the resources according to the applications, acces...
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In recent years, heterogeneous parallel system have become a focus research area in high performance computing field. Generally,in a heterogeneous parallel system, CPU provides the basic computing environment and spec...
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Large-scale distributedcomputingsystems (LDCSs) can be best characterized by their dynamic nature particularly in terms of availability and performance. Typically, these systems deal with various types of jobs in ma...
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The proceedings contain 121 papers. The topics discussed include: a discrete event simulation model for understanding kernel lock thrashing on multi-core architectures;privacy protection in participatory sensing appli...
ISBN:
(纸本)9780769543079
The proceedings contain 121 papers. The topics discussed include: a discrete event simulation model for understanding kernel lock thrashing on multi-core architectures;privacy protection in participatory sensing applications requiring fine-grained locations;a scheduling method for avoiding kernel lock thrashing on multi-cores;an effective framework of light-weight handling for three-level fine-grained recoverable temporal violations in scientific workflows;resilient virtual network service provision in network virtualization environments;detection of behavioral contextual properties in asynchronous pervasive computing environments;automatic thread decomposition for pipelined multithreading;optimistic localization: avoiding location ambiguity in wireless ad-hoc networks;mixed-parallel implementations of extrapolation methods with reduced synchronization overhead for large shared-memory computers;and performance data extrapolation in parallel codes.
Coverage and connectivity are both attractive issues in wireless sensor networks. They are important measurements of quality of service (Qos). Among the existing researches, probabilistic detection model used in cover...
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For current P2P-VoD systems, three fundamental problems exit in user experience: exceedingly large startup delay, long jump latency, and poor playback continuity. These problems primarily stem from lack of media data....
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This paper describes a job distribution system which focuses on standard desktop worker nodes in inhomogeneous and unreliable environments. The system is suited for general purpose usage and supports both batch jobs a...
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ISBN:
(纸本)9783642119491
This paper describes a job distribution system which focuses on standard desktop worker nodes in inhomogeneous and unreliable environments. The system is suited for general purpose usage and supports both batch jobs and object-oriented interactive applications using standard Internet technologies. Advanced scheduling methods minimize the total execution time and improve execution efficiency, specialized to deal with unreliable failing worker nodes.
Grid computing involves the coordinated use of disperse heterogeneous computing resources. This heterogeneity and dispersion makes Quality of Service (QoS) still an open issue requiring attention from the research com...
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In a Cloud-computing environment, consumers, brokers, and service providers interact to achieve their individual purposes. In this regard, service providers offer a pool of resources wrapped as web services, which sho...
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ISBN:
(数字)9783642176258
ISBN:
(纸本)9783642176241
In a Cloud-computing environment, consumers, brokers, and service providers interact to achieve their individual purposes. In this regard, service providers offer a pool of resources wrapped as web services, which should be composed by broker agents to provide a single virtualized service to Cloud consumers. In this study, an agent-based test bed for simulating Cloud-computing environments is developed. Each Cloud participant is represented by an agent, whose behavior is defined by means of colored Petri nets. The relationship between web services and service providers is modeled using object Petri nets. Both Petri net formalisms are combined to support a design methodology for defining concurrent and parallel service choreographies. This results in the creation of a dynamic agent-based service composition algorithm. The simulation results indicate that service composition is achieved with a linear time complexity despite dealing with interleaving choreographies and synchronization of heterogeneous services.
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