Dipl.-Inform. Timo Stegemann

Timo Stegemann joined the Interactive Systems Research Group after receiving a diploma degree in Computer Science from the University Duisburg-Essen in 2011. His main research interest is the visualization of semantic data and the resulting new opportunities for exploration and interaction of these data.

Since he joined the group, Timo has been involved in several funded research projects. In OPDM, he was involved in implementing a product management system to enable the creation of semantic product ontologies by non-technical users. In KOLEGEA, he was investigating novel representations for medical guidelines. Currently, he is involved in the DESUMA project, which will create interactive tools to foster the creation of intelligent product advisors.

Timo was one of the main developers of RelFinder – a tool for visualization of relationships in semantic data. In 2017, the corresponding paper Interactive Relationship Discovery via the Semantic Web from 2010 won the ESWC Best Paper 7 Year Award as most influential paper that was presented at this conference.

His main reaserch project is SemwidgJS. SemwidgJS is a JavaScript based library for displaying Semantic Widgets that enriches websites with UI elements whose data is queried from SPARQL endpoints. SemwidgJS supports creation of simple UI elements such as labels and links, interactive elements for data input and selection that can manipulate other widgets, but also complex elements for displaying charts and maps are available.

Mail
Phone +49 (203) 379-3554
Fax +49 (203) 379-3557
Room LF 285

Publications

Investigating Learnability, User Performance, and Preferences of the Path Query Language SemwidgQL Compared to SPARQL

Stegemann, T. and Ziegler, J. (2017). The Semantic Web – ISWC 2017: 16th International Semantic Web Conference, Vienna, Austria, October 21–25, 2017, Proceedings, Part I, 611–627. Cham: Springer International Publishing.

Pattern-Based Analysis of SPARQL Queries from the LSQ Dataset

Stegemann, T. and Ziegler, J. (2017). ISWC 2017 Posters & Demonstrations and Industry Tracks (ISWC-PD-Industry). Aachen.

Health-Promoting Virtual Shopping Recommender

Lausen, M., Herrmanny, K., Stegemann, T., and Dogangün, A. (2016).

SemwidgJS: A Semantic Widget Library for the Rapid Development of User Interfaces for Linked Open Data

Stegemann, T. and Ziegler, J. (2014). Informatik 2014, Big Data, Komplexität meistern: Tagung vom 22. - 26. September 2014 in Stuttgart ; 44th meeting of the German Informatics Society, 232. - … Jahrestagung der Gesellschaft für Informatik e.V. (GI) ; 44, 479–490. Bonn: Ges. für Informatik.

The Role of Semantic Data in Engineering Interactive Systems

Ziegler, J. and Stegemann, T. (2014). HCI Engineering Charting the Way towards Methods and Tools for Advanced Interactive Systems, 43.

Interactive Construction of Semantic Widgets for Visualizing Semantic Web Data

Stegemann, T., Ziegler, J., Hussein, T., and Gaulke, W. (2012). Proceedings of the 4th ACM SIGCHI Symposium on Engineering Interactive Computing Systems. ACM New York, NY, USA.

X3S: Eine Spezifikation zur Darstellung und interaktiven Exploration semantischer Daten

Stegemann, T., Hussein, T., Gaulke, W., and Ziegler, J. (2011). IVDW ’11: Interaktion und Visualisierung im Daten-Web.

Interacting with semantic data by using X3S

Stegemann, T., Hussein, T., Gaulke, W., and Ziegler, J. (2011). Proceedings of the 1st Workshop on Data-Centric Interactions on the Web.

Interactive Relationship Discovery via the Semantic Web

Heim, P., Lohmann, S., and Stegemann, T. (2010). The Semantic Web: Research and Applications: 7th Extended Semantic Web Conference, ESWC 2010, Heraklion, Crete, Greece, May 30 –June 3, 2010, Proceedings, Part I, 6088, 303–317. Berlin [u.a.]: Springer-Verlag Berlin Heidelberg.

The RelFinder User Interface: Interactive Exploration of Relationships between Objects of Interest

Lohmann, S., Heim, P., Stegemann, T., and Ziegler, J. (2010). Proceedings of the 14th International Conference on Intelligent User Interfaces (IUI 2010). New York, NY: ACM.

Entdecken und Explorieren von Zusammenhängen im Semantic Web

Lohmann, S., Heim, P., Stegemann, T., Tetzlaff, L., and Ziegler, J. (2009). i-com - Zeitschrift für interaktive und kooperative Medien, 8(3), 33–39.

RelFinder: Revealing Relationships in RDF Knowledge Bases

Heim, P., Hellmann, S., Lehmann, J., Lohmann, S., and Stegemann, T. (2009). Semantic Multimedia - Proceedings of the 4th International Conference on Semantic and Digital Media Technologies. Berlin/Heidelberg: Springer.

InteractiveExtractor: Durchgängige Unterstützung bei der Extraktion von anforderungsrelevanten Informationen

Heim, P., Stegemann, T., Lohmann, S., Ziegler, J., Cyriaks, H., and Stolz, H. (2009). Agiles Requirements Engineering: für Softwareprojekte mit einer großen Anzahl verteilter Stakeholder. Leipzig.

Semantisch unterstützte Informationsextraktion aus Dokumentenmengen

Heim, P., Stegemann, T., Lohmann, S., and Ziegler, J. (2009). Mensch & Computer 2009. München: Oldenbourg.

Main research topics

Administrative functions

  • Elected spokesperson of the department’s academic non-tenure staff and Ph.D. students,
    since 2014

Review activities for conferences and workshops

  • International Semantic Web Conference - Posters & Demos Track (ISWC),
    Program Committee, 2017
  • ACM Multimedia Conference (ACMMM),
    Reviewer 2017
  • European Semantic Web Conference - Posters & Demos Track (ESWC),
    Program Committee, 2017
  • International Semantic Web Conference - Posters & Demos Track (ISWC),
    Program Committee, 2016
  • Workshop on Human-Semantic Web Interaction (HSWI),
    Program Committee, 2015
  • Workshop on Human-Semantic Web Interaction (HSWI),
    Program Committee, 2014
  • Workshop on Data-Centric Interactions on the Web (DCI),
    Reviewer, 2011

Review activities for journals

  • Semantic Web Journal (SWJ)

Teaching