Research

I see most of my previous and current research on computational approaches to understand, model and predict user information behavior in Big data and the Social Web.

  • Expertise: AI, Machine Learning, Data Mining, Data Science, User Modeling and Recommender Systems
  • Goal: My research goal is to understand information behavior, to invent intelligent computational methods that are able to simulate and predict this behavior accurately and to research on novel ways (algorithmically or from an HCI perspective) that are able to change or influence the user in her or his information processing or uptake.
  • Approach: I would position my approach to research in the intersection of qualitative and quantitative research design with heavy theoretical underpinning from various fields e.g. economy, psychology, physics or medicine. As such I drive small to large-scale offline studies through e.g. empirical analysis or simulations, living lab studies or large-scale online experiments utilizing the wisdom of the crowd, to explore new patterns, to validate algorithms or models or to validate certain theoretically underpinned hypotheses or research questions.
  • Application: In general my work has applications to many domains, but typically where a large number (potentially millions) of users directly or indirectly interact with each other, and where their collective cognitive output needs to be analyzed, modeled, predicted or changed.

Selected Publications (Last 5 years)

  • Exploiting Food Choice Biases for Healthier Recipe Recommendation. Elsweiler, D.*, Trattner, C.* and Harvey, M. (* equal contribution). In Proceedings of the ACM SIGIR Conference (SIGIR), 2017. PDF
  • Investigating the Healthiness of Internet-Sourced Recipes: Implications for Meal Planning and Recommender Systems. Trattner, C. and Elsweiler, D. In Proceedings of the World Wide Web Conference (WWW), 2017. Best Paper Honorable Mention Award PDF
  • Modeling Activation Processes in Human Memory to Predict the Use of Tags in Social Bookmarking Systems. Trattner, C., Kowald, D., Seitlinger, P., Kopeinik, S. and Ley, T. The Journal of Web Science (JWS), Volume 2, Issue 1, 2016. PDF
  • VizRec: Recommending Personalized Visualizations. Mutlu, B., Veas, E. and Trattner, C. ACM Transactions on Interactive Intelligent Systems (TiiS), Volume 6, Issue 4, 2016. PDF
  • Twitter in Academic Events: A Study of Temporal Usage, Communication, Sentimental and Topical Patterns in 16 Computer Science Conferences. Parra, D., Trattner, C., Gomez, M., Hurtado, D., Wen, X. and Lin, Y. Computer Communications Journal (COMCOM), Volume 73, Part B, 2016. PDF
  • Detecting Partnership in Online and Location-based Social Networks, Trattner, C. and Steurer, M. 2015. Social Network Analysis and Mining (SNAM), Volume 5, Issue 32, 2015. PDF
  • The Impact of Image Descriptions on User Tagging Behavior: A Study of the Nature and Functionality of Crowdsourced Tags. Lin, Y., Trattner, C., Brusilovsky, P. and He, D. Journal of the Association for Information Science and Technology (JASIST), Volume 66, Issue 9, 2015. PDF
  • See Full List of Publications

Grants

  • 2015: EU – AFEL - Analytics For Everyday Learning. Amount: 2,581,940EUR (4 years) CO-Writer I was responsible for the coordination of the project from the KC side and for describing the WPs dedicated to visual analytics and social network analysis.
  • 2014: FFG – K1 Research Center Grant. Amount: $20,400,000 (8 years) CO-Writer This grant proposal was written to extend the funding period (supported by the national science fund FFG) of the Know-Center for the next 8 years. I contributed significantly to this proposal by setting up a detailed strategic research & financial plan with according industry partners for the newly created research area social computing – one out of four research areas at the center.
  • 2014: FFG – 6 COMET Grants. Amount: $572,000 (1 year) PI I acquired 6 scientific industry projects supported with grants by the national science fund (FFG) in the area of Social Computing; one of the project partners is one of the largest media companies in central Europe; an other one is an young German company winning the European start-up competition prize in Amsterdam.
  • 2013: FFG – 3 COMET Grants. Amount: $265,000 (1 year) PI I acquired three industry projects supported with grants by the national science fund (FFG) in the area of Social Computing.
  • 2012: FFG – Innovation Check Grant. Amount: $6300 (1 year) PI This grant proposal was written to conduct in-depth research on the problem of social recommender systems on multi-dimensional data. The research was conducted together with an Austrian start-up with the goal to develop a prototypical social recommender system approach for a virtual marketplace.

Fellowships

  • 2014: ERCIM – Alain Benssousan Fellowship. Amount: $50,000 (1 year) PI This proposal was written to conduct individual in-depth research on the problem of predictive modeling in big data with colleagues at NTNU in Norway. This research is supported by ERCIM - the European Research Consortium of Informatics and Mathematics – acceptance rate 19/186
  • 2012: Marshall Plan - Visiting Scholar Fellowship. Amount: $10,000 (5 months) PI This proposal was written to conduct individual in-depth research on the topic of efficient information access in social systems.
  • 2011: FFG - Dissertation Fellowship. Amount: $100,000 (2 years) CO-PI This proposal was written together with my PhD advisor Denis Helic to conduct individual in-depth research on the topic of tag-based information access in social systems. I contributed significantly to the ideas, the study planning, and the overall research plan.

Awards

  • 2017: Best Paper Award Honorable Mention at the World Wide Web Conference (WWW’17), Perth, Australia.
  • 2014: Best Poster Award at the ACM Conference on Hypertext and Social Media (HT’14), Santiago de Chile, Chile.
  • 2013: Best Paper Award at the International Conference on Social Eco Informatics (SOTICS’13), Barcelona, Spain.
  • 2013: Second Best Poster Award at the ACM Web Science Conference (WebSci’13), Paris, France.
  • 2012: Best Paper Award at the International Conference on Knowledge Management and Knowledge Technologies (I-Know’12), Graz, Austria.
  • 2012: Douglas Engelbert Best Paper Nomination at the ACM Conference on Hypertext and Social Media (HT’12), Milwaukee, USA.
  • 2012: ACM Student Travel Award to attend the ACM Conference on Hypertext and Social Media (HT’12), Milwaukee, USA.
  • 2011: Young Scholar Best Paper Award at the International Conference on Information Technology Interfaces (ITI’11), Cavtat, Croatia.
  • 2010: SFG & OFG International Travel Award from the Austrian Science Funds SFG & OFG.

Talks

You may find the slides of some of the talks below on my SlideShare account.

  1. 04/2017: Paper Presentation at WWW’17, AU
    Title: Investigating the Healthiness of Internet-Sourced Recipes: Implications for Meal Planning and Recommender Systems
  2. 09/2016: Paper Presentation at RecTour WS at RecSys’16, USA
    Title: Understanding the Impact of Weather for POI Recommender Systems
  3. 07/2016: Invited Talk at MODUL University Vienna, Austria
    Title: From Behavioral Analytics to Predictive Modeling on the Web
  4. 05/2016: Invited Talk at University of Southampton, UK
    Title: Understanding, Modeling & Changing Food Patterns on the Web
  5. 11/2015: Invited Talk at TU Delft, Delft Netherlands
    Title: From Behavioral Analytics to Predictive Modeling on the Web
  6. 10/2015: Invited Talk at University of Bolzano, Bolzano, Italy
    Title: Studying Online Food Consumption and Production Patterns: Recent Trends and Challenges
  7. 10/2015: Poster Presentation at DMRS’15, Bolzano, Italy
    Title: Biases in Online Food Recipe Production
  8. 6/2015: Poster Presentation at WWW’15, Florence, Italy
    Title: Temporality in Online Food Recipe Consumption and Production
  9. 1/2015: Invited Talk at Yahoo Trondheim, Trondheim, Norway
    Title: Human Cognition in Recommender Systems
  10. 12/2014: Invited Talk at Graz University of Technology, Graz, Austria
    Title: Twitter in Academic Conferences
  11. 11/2014: Invited Talk at University of Ghent, Ghent, Belgium
    Title: Social Computing in the area of Big Data
  12. 11/2014: Invited Talk at Norwegian University of Science and Technology, Trondheim, Norway
    Title: Social Computing in the area of Big Data
  13. 10/2014: Invited Talk at Yahoo! Research, Barcelona, Spain
    Title: Social Computing in the area of Big Data
  14. 9/2014: Invited Talk at I-Know/EC-TEL’14, Graz, Austria
    Title: Towards a BigData Recommender Engine for Online and Offline Marketplaces
  15. 9/2014: Invited Talk at Pontificia Universidad Catolica de Chile, Santiago, Chile
    Title: Social Computing in the area of Big Data
  16. 9/2014: Paper Presentation at ACM HT’14, Santiago, Chile
    Title: Recommending Items in Social Tagging Systems Using Tag and Time Information
  17. 4/2014: Poster Presentation at WWW’14, Seoul, South Korea
    Title: Who will trade with Whom: Predicting Seller Buyer Interactions through Social Networks
  18. 10/2013: Paper Presentation at ACM CIKM’13, San Francisco, USA
    Title: Recommending Tags with a Model of Human Categorization
  19. 10/2013: Invited Talk at University of Tallinn, Tallinn, Estonia
    Title: An open light-weight framework for social-semantic personalization and recommendation
  20. 7/2013: Invited Talk at Mendeley (Elsevier), London, UK
    Title: Je t’aime. . . moi non plus: reporting on the opportunities, expectations and challenges of a real academic-industrial collaboration
  21. 2/2013: Invited Talk at Hewlett-Packard, Vienna, Austria
    Title: Why Social Network Research is Good for You!
  22. 9/2012: Paper Presentation at I-Know’12, Graz, Austria
    Title: Pragmatic Evaluation of Concept Hierarchies
  23. 6/2012: Paper Presentation at ACM HT’12, Milwaukee, USA
    Title: Evaluating Tag-Based Information Access in Image Collections
  24. 11/2011: Invited Talk at University of Pittsburgh, Pittsburgh, USA
    Title: Enhancing the Navigability of Social Tagging Systems
  25. 11/2011: Paper Presentation at ICWI’11, Rio de Janero, Brazil
    Title: Social Media Marketing with Facebook: A Case Study
  26. 9/2011: Paper Presentation at I-Know’11, Graz, Austria
    Title: Enhancing the Navigability of Social Tagging Systems with Tag Taxonomies
  27. 8/2011: Invited talk at University of Ohrid, Macedonia
    Title: Networks Navigability: Theory and Applications
  28. 7/2011: Paper Presentation at IEEE ITI’11, Dubrovnik, Croatia
    Title: Improving the Navigability of Tagging Systems with Hierarchically Constructed Resource Lists: A Comparative Study
  29. 6/2011: Paper Presentation at ICWE’11, Phaphos, Cyprus
    Title: NAVTAG - A Network Theoretic Framework to assess and improve the navigability of tagging systems
  30. 10/2010: Paper Presentation at ICWI’10, Timisoara, Romania
    Title: QueryCloud: Automatically linking related Documents via Search Query (Tag) Clouds
  31. 7/2010: Poster Presentation at ICWE’10, Vienna, Austria
    Title: Linking Related Documents: Combining Tag Clouds and Search Queries
  32. 6/2010: Paper Presentation at IEEE ITI’10, Dubrovnik, Croatia
    Title: Enriching Tagging Systems with Google Query Tags
  33. 6/2010: Paper Presentation at IEEE ITI’10, Dubrovnik, Croatia
    Title: Social Networks and eLearning: New Model for Learning at Workplace

Copyright © 2017 Christoph Trattner

Last updated: May 27th, 2017