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Item type:Publication, Access status: without files , From WSQoSX to the Cloud : 10 Years of Research on Services Computing at KOMToday, Service-oriented Computing (SOC) is a major design and implementation approach for a wide range of applications, ranging from Everything-as-a-Service (XaaS) in the Cloud to service-based machine learning approaches like federated learning. The Multimedia Communications Lab (KOM) at TU Darmstadt has been one of the early contributors to this research field. With the retirement of Ralf Steinmetz, it is time to look back at the areas where people from KOM have contributed to SOC, and which impact this research has generated. Therefore, this paper presents 10 years of SOC research at KOM, roughly covering the years 2006 to 2016.Publicationtype: Book part11 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Comparison and retrieval of process models using related cluster pairsAlthough increasingly IT-supported, effective techniques for process model retrieval and identification of process model differences or changes - needed for a variety of management and conformance purposes - are still challenging problems in business process management. Performing automated process comparison and finding relevant reference processes are not routine procedures for today's operational process repositories. Efficient combinations of similarity measures for various process model characteristics can still improve the performance of process comparison and retrieval. The approach at hand introduces the concept of related cluster pairs, parameterises it with semantic, string-based, and novel hybrid metrics for comparing process models, and defines a novel similarity notion for process model retrieval. Evaluations with process data from the SAP reference model show that our approach outperforms current related work and established text search engines.Publicationtype: Journal Article21 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Das IT-Governance-Framework CObIT als Wissensdatenbank : Entwurf, Umsetzung und Evaluation einer Ontologie(Technische Universität Darmstadt, 2011); ; ; Publicationtype: Technical Report54 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Typische Elemente von SOA-Governance-Ansätzen : ein Survey(Technische Universität Darmstadt, 2010); ; ; Publicationtype: Technical Report23 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Governance of a service-oriented architecture for environmental and public security(Springer, 2009-05); ; ; ; Research for the application of technical support in environmental projects has grown rapidly due to the progress of sensor network systems and the large, scalable IT infrastructures that can unify and expand them. There are numerous attempts to make use of new technologies in order to serve environmental purposes. The research presented in this paper focuses on critical aspects of the core infrastructure of a project that aims to serve these purposes as well. The nature of the actions that must be taken against environmental disasters, which are our target use cases, dictate that extended, crossorganizational information and communication systems are engaged. In order to integrate information from different sources and process heterogeneous services, the IT infrastructure is based on the paradigm of Service-Oriented Architectures (SOA). However, the distributed and often very large nature of an SOA leads to a need for governance mechanisms. We present an SOA governance approach targeted to serve the purposes of large-scale distributed IT landscapes for environmental and public security.Publicationtype: Conference Paper43 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Selected Topics in Service Engineering and Management for Enterprise Systems(2008-12); ; ; ; Publicationtype: Conference Paper20 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Worst-case workflow performance optimizationPerformance evaluation and execution management of service-oriented workflows became quite important in order to avoid performance degradation. Performance measurement is crucial to ensure that workflow execution remains feasible and that SLA violations due to overload are avoided. Network calculus as a well-known system theory for deterministic queuing systems can be used to describe the worst-case performance behavior of a workflow in order to plan workflow control in advance. Concerning business processes with high repetition rates the workflow controller has to be able to serve all incoming requests with an optimal composition of Web services. Thus, this paper presents a formal worst-case calculation model using the concepts of network calculus. Furthermore, optimization problems based on the worst-case scenario are introduced in order to minimize the worst-case delay and to maximize the throughput of the Web services invoked with minimal costs.Publicationtype: Conference Paper25 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Towards automated monitoring and alignment of service-based workflowsUsing Web services and Service-oriented Architectures to implement cross-organizational workflows has become state-of-the-art for the realization of collaborations between enterprises. Here, a key issue is the monitoring of workflows and services based on given business requirements and the handling of deviations from those requirements to fulfil Service Level Agreements. In this paper we present an approach to the automated monitoring and alignment of service-based workflows. We describe a policy language for the specification of requirements and deviation handling as well as a distributed architecture supporting automated monitoring and alignment in service ecosystems.Publicationtype: Conference Paper30 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , 24