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Auflistung nach Autor:in "Schaefer, Jan"

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  • Konferenzbeitrag
    QoS-based testing and selection of semantic services
    (ARCS 2012 Workshops, 2012) Schaefer, Jan; Kroeger, Reinhold; Meixler, Simone; Brinkschulte, Uwe
    The importance of context-awareness is constantly increasing. Users want systems to react dynamically to their current context (e.g. their location). For emerging home service platforms, this represents a key element, as it allows systems to increase the users' comfort tremendously by acting on sensed and deducted situations. As such systems feature a lot of dynamic interaction between services, it has to be ensured that service selections and bindings simply work. This paper proposes an approach for QoS-based testing and selection of semantic services, which employs a service tester that uses genetic algorithms to check and monitor QoS properties. These properties are used to complete the semantic descriptions of services running on the platform, which are managed by a semantic service registry.
  • Konferenzbeitrag
    Semantic self-management and mediation for home service platforms
    (Informatik 2014, 2014) Schaefer, Jan
    Service-oriented computing has long outgrown the enterprise. Today, personal living environments feature an increasing number of convenience-, healthand securityrelated applications provided by distributed interacting devices and services (often called smart homes), which do not only support users but require management tasks such as application installation, configuration and continuous maintenance. These tasks are becoming complex and error-prone. One way to escape this situation is to enable service platforms to configure and manage themselves. The approach presented here extends services with semantic descriptions to enable platform-independent autonomous service level management and mediation using model driven architecture and autonomic computing concepts. It has been implemented as a semantic autonomic manager, whose concept, prototypical implementation and evaluation are presented.