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Accurate knowledge of the dispersion relations of guided waves in plates is important for the efficient use of Lamb wave-based damage-detection methods. In this paper, we introduce a method which aims at automatically extracting the dispersion curves from laser vibrometer measurement data in an easy and robust manner. This method works by Fourier transforming the measurement data into the wavenumber...
In this paper we introduce a new modeling tool for constraint handling in the area of workflow technology. The constraint handlers can be used to improve the quality of business processes but without changing already existing business logic. Todays workflow languages provide no possibility to model constraints and the actions in case the constraints get violated explicitly. Fault and event handling...
The conditions arising for the realization of visualization-oriented applications have recently changed. Especially in pervasive environments, where predominantly small and limited devices are present, the need for a distributed realization of relevant visualization processes is present. Due to the impact of user interaction at runtime, issued by e.g. pervasive applications, animations needs to be...
Humans usually think of a location not as pair of coordinates but rather in a semantic way as place. In this paper, we are presenting a concept to integrate places in a framework for the development of user- centered community platforms. We follow a grassroots approach for collecting places and introduce an ontology-based place model along with concepts for mapping geographic coordinates to places...
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