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Author: Wunderlich, Marcel ×

Publications Search Results

Now showing 1 - 3 of 3
  • Publication
    Interactive Input and Visualization for Planning with Temporal Uncertainty
    ( 2023)
    Höhn, Markus orcid-logo
    ;
    Wunderlich, Marcel
    ;
    Ballweg, Kathrin
    ;
    Kohlhammer, Jörn orcid-logo
    ;
    Landesberger, Tatiana Von
    When planning series of events or processes, everyone has to cope with temporal uncertainty. Popular examples are holiday planning or train trips. There are several approaches to visualize temporal uncertainty when temporal data and events are already defined, but common research usually does not take uncertainty into account, neither as input nor output. To develop our design, we considered a variety of common approaches for uncertainty visualization and used participatory evaluation to validate our concept. Our design aims at using this uncertainty visualization while sketching the plan interactively. The user may draw and connect a variety of activities using different graphical metaphors as hints for uncertainty. The sketches are immediately interpreted and turned into a visualization to check and validate the resulting plan. To evaluate our new visualization and interactive approach, we conducted a quantitative user study. With an average correctness of 81%, the study shows that the visualization and interaction design work well together and that scheduling plans containing temporal uncertainties can be externalized by the majority of participants without major difficulties.
  • Publication
    Interactive Input and Visualization for Planning with Temporal Uncertainty
    ( 2022)
    Höhn, Markus orcid-logo
    ;
    Wunderlich, Marcel
    ;
    Ballweg, Kathrin
    ;
    Kohlhammer, Jörn orcid-logo
    ;
    Landesberger, Tatiana von
    Data with temporal uncertainty is ubiquitous in everyone's life. Popular examples are holiday planning or train trips. There are several approaches to visualize temporal uncertainty, but common research usually does not take uncertainty into account, neither as input nor output. We propose a new approach that provides both an interactive drawing for data with temporal uncertainty and their respective visualizations. The user can draw both variable and fixed activities and also has the possibility to set probability distributions and enter indefinite activities. A quantitative user study shows the need and suitability of our new approach.
  • Publication
    Influence of Container Resolutions on the Layout Stability of Squarified and Slice-And-Dice Treemaps
    ( 2020)
    Knauthe, Volker
    ;
    Ballweg, Kathrin
    ;
    Wunderlich, Marcel
    ;
    Landesberger, Tatiana von
    ;
    Guthe, Stefan
    In this paper, we analyze the layout stability for the squarify and slice-and-dice treemap layout algorithms when changing the visualization containers resolution. We also explore how rescaling a finished layout to another resolution compares to a recalculated layout, i.e. fixed layout versus changing layout. For our evaluation, we examine a real world use-case and use a total of 240000 random data treemap visualizations. Rescaling slice-and-dice or squarify layouts affects the aspect ratios. Recalculating slice-and-dice layouts is equivalent to rescaling since the layout is not affected by changing the container resolution. Recalculating squarify layouts, on the other hand, yields stable aspect ratios but results in potentially huge layout changes. Finally, we provide guidelines for using rescaling, recalculation and the choice of algorithm.