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Auflistung nach Autor:in "Kowalkiewicz, Marek"

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  • Konferenzbeitrag
    Expected utility of content blocks in web content extraction
    (Business Information Systems – 9th International Conference on Business Information Systems (BIS 2006), 2006) Kowalkiewicz, Marek
    In this paper we discuss the possible application of new concepts in web content extraction: utility assessment, utility annealing, and dynamic aggregated document generation. After analysis of the state of the art in web content extraction, results of a survey study among Polish managers are presented. The discussion covers a web content extraction system with possible extensions that may help tackle the information overload problem. The discussed extensions go beyond current state of the art. Utility assessment considers economical view on value of information, while utility annealing allows for removing content blocks that cover information already acquired from other content blocks. Due to the existing content block extraction technology and new concepts proposed in the paper, it is possible to dynamically generate aggregated documents.
  • Konferenzbeitrag
    Towards Adaptive Management of QoS-aware Service Compositions - Execution Strategies
    (Grid service engineering and management – the 4th international conference on grid service engineering and management – GSEM 2007, 2007) Momotko, Mariusz; Gajewski, Michał; Ludwig, André; Kowalczyk, Ryszard; Kowalkiewicz, Marek; Zhang, Jian Ying
    Service compositions enable users to realize their complex needs as a single request. Despite intensive research, especially in the area of business processes, web services and grids, an open and valid question is still how to manage service compositions in order to satisfy both functional and non-functional requirements as well as adapt to dynamic changes. In this paper we describe an approach towards adaptive management of QoS-aware service compositions. This approach integrates well known concepts and techniques and proposes various execution strategies based on dynamic selection and negotiation of services, contracting based on service level agreements, service enactment with flexible support for exception handling, monitoring of service level objectives, and profiling of execution data.