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Auflistung nach Autor:in "Gudenkauf, Stefan"

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  • Zeitschriftenartikel
    Bericht zum Grid Workflow Workshop - Oldenburg 2008
    (Softwaretechnik-Trends Band 28, Heft 2, 2008) Gudenkauf, Stefan
    Am 03./04. März 2008 fand der erste Grid Workflow Workshop im OFFIS in Oldenburg statt. Über 30 Teilnehmer aus Wissenschaft und Wirtschaft tauschten sich im Rahmen der D-Grid-Initiative des BMBF (www.d-grid.de) über das Thema Workflows in Grid-Umgebungen aus, in denen verteilte Ressourcen standardisiert gemeinschaftlich genutzt werden. Workflows in Grid-Umgebungen können dabei als Arbeitsabläufe verstanden werden, die eine vordefinierte Abfolge von einzelnen Aktivitaten innerhalb eines Grids ausführen. Im Mittelpunkt des Workshops standen die Vorstellung und die Bündelung der Aktivitäten der einzelnen Projekte des D-Grid. Für einen Abgleich mit internationalen Initiativen sorgten die Vortrage der Keynote-Sprecher Prof. Dr. Wolfgang Gentzsch (D-Grid) und Dr.-Ing. habil. Thilo Kielmann (VU Amsterdam). Die Veranstaltung wurde durch Sun Microsystems unterstützt. Der vorliegende Bericht fasst die Inhalte und wichtigsten Ergebnisse des Grid Workflow Workshop vom 03./04. Marz 2008 in Oldenburg zusammen. Die Präsentationen der Vortragenden und weitere Informationen sind auf der Internetseite https://bi.offis.de/bisgrid/tiki-index.php?page_ref_id=15 verfügbar.
  • Zeitschriftenartikel
    Bericht zum Workshop Software Engineering im Unterricht der Hochschulen - Stuttgart 2007
    (Softwaretechnik-Trends Band 27, Heft 2, 2007) Matevska, Jasminka; Gudenkauf, Stefan
    Dieser Bericht fasst die persönlichen Eindrücke der beiden Autoren vom 10. Workshop Software Engineering im Unterricht der Hochschulen vom 22. bis zum 23. Februar 2007 zusammen. Zunächst werden die einzelnen Vorträge dargestellt und dann die Panel-Diskussionsrunde und der Eingeladene Vortrag kommentiert. Schließlich wird das Resumee der Studierenden beschrieben. An dieser Stelle weisen die Autoren ausdrücklich auf den Tagungsband zum Workshop hin. Dieser enthalt sämtliche Beitrage, die den Vorträgen zugrunde gelegen sind.
  • Konferenzbeitrag
    Data Warehousing for Distributed Offshore Research at Alpha Ventus Overview and Insights gained
    (Proceedings of the 27th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2013) Gudenkauf, Stefan; Claassen, Arno
    alpha ventus is the pilot project to build the first German offshore wind farm under real sea conditions. The project started in 2007 under the promotion of the Deutsche Offshore-Testfeld- und Infrastruktur- GmbH & Co. KG (DOTI), a joint organization founded by the three major German energy companies E.ON, EWE AG and Vattenfall, and partially funded by the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU). The project is accompanied by several research projects that are organized in the Research at Alpha Ventus (RAVE) initiative2. For these projects, a data warehouse is used to store, archive, and provide access to the technical and environmental high-resolution data that the alpha ventus wind farm generates. Daily, the alpha ventus wind farm collects 5 billion sensor values. Since its initial launch in April 2010, the data volume stored in the alpha ventus data warehouse has reached 14 terabytes and is growing by additional 6 terabytes per year. Thereby, the main challenge is twofold: to process large amounts of data to provide convenient accesss to the data warehouse to research groups and to meet the security requirements imposed by the two involved wind generator manufacturers. In this contribution, we present an overview on the architecture of the Wind Energy Data warehouse for Alpha ventus (WEDA), present information on the use of the WEDA system, and share our insights gained from the past years of operation.
  • Konferenzbeitrag
    Domain-specific modelling for coordination engineering with SCOPE
    (Modellierung 2012, 2012) Gudenkauf, Stefan; Kruse, Steffen; Hasselbring, Wilhelm
    The demand for increasing performance is a continuous trend in computing. Today's multi-core processors and future many-core processors require software developers to exploit concurrency in software as far as possible. To ease the task of developing concurrent software we present our Coordination-First approach and the coordination modelling language SCOPE that introduces the space-based choreography of processes, which internally orchestrate fine-grained workflow activities. The main contributions are (1) the Coordination-First approach that addresses the conformance to higher-level concurrency models in a standardised way by regarding the coordination model of a concurrent program as the first artefact in the software development process using model-driven software engineering techniques, (2) the coordination language SCOPE which conforms to the well-known BPMN 2.0 and differentiates between the space-based choreography of multiple concurrent process components and the orchestration of fine-grained activities within a single process component, and (3) the SCOPE workbench - an implementation of SCOPE based on the Xtext language framework to show the feasibility of our approach.
  • Konferenzbeitrag
    Features of Event-Driven Message Queuing Architectures in Manufacturing: A Reference Model for Comparison
    (INFORMATIK 2023 - Designing Futures: Zukünfte gestalten, 2023) Gudenkauf, Stefan; Franke, Javier; Behrens, Janek
    With increasing digitization and the use of cost-effective, ever more intelligent sensor and actuator systems at the edges of classic IT networks (edge computing), ever-increasing amounts of data are continuously being generated and sent from a wide variety of data sources. At the same time, manufacturing processes are subject to dynamic adjustments such as staff shortages, material shortages and fluctuations in energy costs. In addition, there is the requirement to demonstrate the sustainability of produced goods within the supply chain and to the outside world, which requires the collection of key figures across all levels of the manufacturing pyramid – and ideally also across the entire life cycle of the product. What they all have in common is that a very large amount of continuously and simultaneously operating systems can process sent data quickly and can react to relevant events in near real time. To build these systems, increasingly distributed applications based on the principle of message queuing (MQ) and event handling are attracting increasing interest in the manufacturing industry. In this paper4, we surveyed recent models and architectures for such event-driven systems. Based on this survey, we propose a consolidated feature model to uniformly describe and evaluate event-driven manufacturing systems, regardless of whether an organization’s own architectural needs or the offers of external providers are evaluated.