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Auflistung nach Autor:in "Huemer, Christian"

1 - 5 von 5
  • Konferenzbeitrag
    A B2B benchmark on top of UMM and TPC-app
    (Pragmatic web – Proceedings of the first international conference on the pragmatic web, 2006, 2006) Hofreiter, Birgit; Huemer, Christian; Mosser, Robert
    The TPC-App is a B2B benchmark implementing a retail scenario. This benchmark specifies a set of web services interactions to test the performance of an application server. Today B2B systems undergo a permanent technological change. There even exist competitive technologies at the same time. From a business perspective it is important that the application systems of the business partners interoperate no matter what technology is applied. In order to measure the effects of using a combination of different technologies for the same B2B scenario, we reverse engineer the TPC-App scenario into a platform independent model following the UN/CEFACT's Modeling Methodology (UMM). The resulting UMM-App benchmark defines a conceptual B2B model that may be implemented by different IT technologies in order to evaluate feasibility and performance.
  • Zeitschriftenartikel
    Editorial
    (Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 9, Nr. 1, 2014) Hofreiter, Birgit; Huemer, Christian
  • Zeitschriftenartikel
    A Linked Data Based Messaging Architecture for the Web of Needs
    (Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 11, Nr. 3, 2016) Kleedorfer, Florian; Busch, Christina Maria; Huemer, Christian; Pichler, Christian
    Electronic marketplaces are built to resemble real marketplaces structurally. Consequently, they are centralized systems, walled gardens with an intrinsic tendency to lock merchants and clients in. We argue that this structure is not necessary on the Web and that all online marketplaces could merge into one global medium for exchange. In this paper, we propose an architecture for such a medium based on semantic Web standards, encompassing the functionalities of publishing an intention to buy or sell, finding transaction partners, and conducting transactions. We focus on the basic protocol layer and explain how messaging and linked data are combined in a novel way to realize a highly dynamic communication system.
  • Konferenzbeitrag
    Model-driven Runtime State Identification
    (40 Years EMISA 2019, 2020) Wolny, Sabine; Mazak, Alexandra; Wimmer, Manuel; Huemer, Christian
    With new advances such as Cyber-Physical Systems (CPS) and Internet of Things (IoT), more and more discrete software systems interact with continuous physical systems. State machines are a classical approach to specify the intended behavior of discrete systems during development. However, the actual realized behavior may deviate from those specified models due to environmental impacts, or measurement inaccuracies. Accordingly, data gathered at runtime should be validated against the specified model. A first step in this direction is to identify the individual system states of each execution of a system at runtime. This is a particular challenge for continuous systems where system states may be only identified by listening to sensor value streams. A further challenge is to raise these raw value streams on a model level for checking purposes. To tackle these challenges, we introduce a model-driven runtime state identification approach. In particular, we automatically derive corresponding time-series database queries from state machines in order to identify system runtime states based on the sensor value streams of running systems. We demonstrate our approach for a subset of SysML and evaluate it based on a case study of a simulated environment of a five-axes grip-arm robot within a working station.
  • Zeitschriftenartikel
    Model-driven Runtime State Identification.
    (EMISA Forum: Vol. 39, No. 1, 2019) Wolny, Sabine; Mazak, Alexandra; Wimmer, Manuel; Huemer, Christian