Hasso-Plattner-Institut
Prof. Dr. Jürgen Döllner
  
 

Contact

Tel.: +49-(0)331 5509-3921
Fax: +49-(0)331 5509-172
Room: H-2.22
Email: sebastian.hahn(at)hpi.de

Research Interests

  • Visual Software Analytics
  • Metaphor-based Visualization
  • Layout Stability
  • Evaluation of Visualization Techniques

 

 

 

Publications

Reducing Visual Complexity in Software Maps using Importance-based Aggregation of Nodes

in Proceedings of the 8th International Conference on Information Visualization Theory and Applications . 2017 .

Depicting massive software system data using software maps can result in visual clutter and increased cognitive load. This paper introduces an adaptive level-of-detail (LoD) technique that uses scoring for interactive aggregation on a per-node basis. The scoring approximates importance by degree-of-interest measures as well as screen and user-interaction scores. The technique adheres to established aggregation guidelines and was evaluated by means of two user studies. The first user study investigates task completion time in visual search. The second evaluates the readability of the presented nesting level contouring for aggregates. With the adap- tive LoD technique software maps allow for multi-resolution depictions of software system information. It facilitates efficient identification of important nodes and allows for additional annotation. © The Authors 2017. This is the authors' version of the work. It is posted here for your personal use. Not for redistribution. The definitive version will be published in Proceedings of the 8th International Conference on Information Visualization Theory and Applications (IVAPP 2017).
2017-importance-based-aggregation.png
LSHD2017.pdf
Further Information
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Teaching

WiSe 2016/17

  • Lecture 3D Computergraphics I (tutor)

SoSe2016

  • Seminar Methods and Techniques of Software Visualization (tutor)
  • Lecture 3D Computergraphics II (tutor)

WiSe2015/16

  • Seminar Systems Engineering for Software Analytics (tutor)

SoSe2015

  • Seminar Visual Software Analytics (tutor)
  • Lecture Einführung in die Programmiertechnik II (tutor)

WiSe2014/15

  • Seminar Visualization for Interactive Software Analytics (tutor)
  • Bachelor's project Software Analytics and Visualization (co-supervisor)

SoSe 2014

  • Lecture 3D Computergraphics I (tutor)

WiSe 2013/14

  • Seminar Software Analytics (tutor)
  • Seminar Game Programming (tutor)

SoSe 2013

  • Lecture Geovisualization (tutor)
  • Seminar Softwarevisualisierungsverfahren (tutor)

WiSe 2012/13

  • Bachelor's project A Visualization Tool for Software Evolution (co-supervisor)

SoSe 2012

  • Lecture Visualization (tutor)
  • Seminar Softwareanalyseverfahren (tutor)

Master's Theses

  • ThreadCity: Combined Visualization of Structure and Activity of Multi-threaded Software Systems - Nikolai Wuttke (finished

Further Activities

  • Participant of ETH Winter School on Eye Tracking  (January 2016)
  • Teaching-Team Member OpenHPI Course "Automated Visual Software Analytics" (March 2015)
  • SoftVis project in cooperation with the SAP Innovation Center, Potsdam (April 2012 - March 2016)