Browsing by Author "Heidemann, Gunther"

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    Fronts between Hopf- and Turing-type domains in a two-component reaction-diffusion system
    (1993) Heidemann, Gunther; Bode, Matthias; Purwins, Hans-Georg
    Propagating and standing fronts between Hopf- and Turing-type domains are observed experimentally on a one-dimensional array of resistively coupled nonlinear LC-oscillators describable by a two-component reaction-diffusion equation. Numerical and experimental results are compared in particular with respect to front velocities. In the neighbourhood of a codimension-two point two coupled Ginzburg-Landau equations, derived by multiple scale methods, are useful approximation.
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    Methods for coreference visualization and annotation
    (2010) Burkovski, Andre; Heidemann, Gunther; Kobdani, Hamidreza; Schütze, Hinrich
    In this report we present methods for visualization of coreferences. We use Self Organizing Maps, graph-based models, and text-based techniques to visualize coreference information from a pair-wise model and offer an interactive presentation of the feature space. We introduce our software system and several visualizations of the Self Organizing Map. The visualizations enable the user to explore the feature space, provide insights for feature engineering and allow a fast annotation of data with coreference information.