Research

  • Goal: My research goal is to (1) understand user behavior and to invent intelligent computational methods that are able to simulate and predict user behavior accurately and (2) to research on and develop novel methods (algorithmically or from an HCI perspective) that are able to change and positivly infuence user behavior through, for example, recommender technology.
  • 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.

Awards

  • 2018: Austrian Chamber of Commerce (WKO) Prize for our proposal on "A predicative Facebook advertising model for the Austrian food retail trade".
  • 2017: On the list of the Annual Best of Computing in ACM Computing Reviews for our work on "VizRec: recommending personalized visualizations" published in ACM TiiS.
  • 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.

Selected Publications (Last 5 years)

Predictive Modelling & Algorithms

  • Investigating the utility of the weather context for point of interest recommendations. Trattner, C., Oberegger, A., Marinho, L. and Parra, D. Information Technology & Tourism, 2018. PDF
  • Predicting Trading Interactions in an Online Marketplace through Location-Based and Online Social Networks. Eberhard, L., Trattner, C. and Atzmueller, M. Information Retrieval Journal, 2018. PDF
  • On the Predictability of the Popularity of Online Recipes. Trattner, C., Moesslang, D. and Elsweiler, D. EPJ Data Science, 2018. PDF
  • TCNSVD: A Temporal and Community-Aware Recommender Approach. Shahriari, M., Barth, M., Klamma, R. and Trattner, C. In Proceedings of the Temporal RecSys workshop held at ACM RecSys, 2017. 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

Data Science & Behavioral Analytics

  • The Impact of Recipe Features, Social Cues and Demographics on Estimating the Healthiness of Online Recipes. Rocicki, M.*, Trattner, C.* and Herder, E. (* equal contribution). In Proceedings of the 12th International AAAI conference on Web and Social Media (ICWSM), 2018. PDF
  • Monitoring obesity prevalence in the United States through bookmarking activities in online food portals. Trattner, C., Parra, D. and Elsweiler, D. PLOS ONE 12(6), 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
  • Twitter in Academic Events: A Study of Temporal Usage, Communication, Sentimental and Topical Patterns in 16 Computer Science Conferences. Parra, D., Trattner, C., Gómez, D., Hurtado, M., Wen, X., & Lin, Y. R. Computer Communications Journal (COMCOM), Volume 73, Part B, 2016. 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 American Society for Information Science and Technology (JASIST), 2015. PDF

Intelligent Systems

  • Content-based artwork recommendation: integrating painting metadata with neural and manually-engineered visual features. Messina, P., Dominguez, V., Parra, D., Trattner, C. and Soto, A. User Modeling and User-Adapted Interaction Journal. 2018. PDF
  • The Roadmap to User-Controllable Social Exploratory Search. di Sciascio, C., Brusilovsky, P., Trattner, C. and Veas, E. ACM Transactions on Interactive Intelligent Systems. 2018.
  • VizRec: Recommending Personalized Visualizations. Mutlu, B., Veas, E. and Trattner, C. ACM Transactions on Interactive Intelligent Systems (TiiS), Volume 6, Issue 4, 2016. ACM Annual Best of Computing PDF
  • Towards a Scalable Social Recommender Engine for Online Marketplaces: The Case of Apache Solr. Lacic, E., Kowald, D., Parra, D., Kahr, M. and Trattner, C. In Proceedings of the World Wide Web Conference companion (WWW), 2014. PDF
  • User Controllability in an Hybrid Talk Recommender System. Parra, D., Brusilovsky, P. and Trattner, C. In Proceedings of the ACM 2014 International Conference on Intelligent User Interfaces (IUI), 2014. PDF

See Full List of Publications

Grants

  • 2018: National Research Council Norway - ITS for sustainable TRANSport: In-vehicle FEEDback on eco-driving and external costs. Amount: 6,700,000NOK Co-investigator.
  • 2018: National Research Council Norway - Investigating the impact of Artificial Intelligence on the Journalism's Social Contract - Issues of Machine Ethics in Modern Journalism. Amount: 297,000NOK Co-investigator.
  • 2017: Austrian Research Promotion Agency – EcoMove - Knowledge-based platform for predicting mobility bottlenecks and promoting sustainable behavioral change. Amount: 345,424EUR (2 years) Proposal Coordinator I was responsible for the coordination of the project proposal and for describing the WP dedicated to predictive modeling and recommender systems.
  • 2014: Austrian Research Promotion Agency – K1 Research Center Grant. Amount: 20,000,000EUR (8 years) Co-investigator 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: Austrian Research Promotion Agency – 6 COMET funded industry projects. Amount: ~500,000EUR (1 year) PI I co-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.
  • 2014: European Union - Marie Curie ERCIM – Alain Benssousan Fellowship. Amount: 50,000EUR (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
  • 2013: Austrian Research Promotion Agency – 3 COMET funded industry projects. Amount: ~250,000EUR (1 year) PI I co-acquired three industry projects supported with grants by the national science fund (FFG) in the area of Social Computing.
  • 2012: Austrian Research Promotion Agency – Innovation Check Grant . Amount: 5,000EUR (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.
  • 2012: Marshall Plan - Visiting Scholar Fellowship. Amount: 7,500USD (5 months) PI This proposal was written to conduct individual in-depth research on the topic of efficient information access in social systems.
  • 2011: Austrian Research Promotion Agency - Dissertation Fellowship. Amount: 100,000EUR (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.

Talks

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

  1. 10/2018: Invited Poster Presentation at ACM RecSys’18
    Title: Healthy Menus Recommendation: Optimizing the Use of the Pantry
  2. 10/2018: Invited Poster Presentation at ACM RecSys’18
    Title: Towards Explanations for Visual Recommender Systems of Artistic Images
  3. 9/2018: Invited Talk at the University of Stavanger, Norway
    Title: Computational Social Science for Health Decision Making
  4. 6/2018: Invited Talk at the AAAI ICWSM Workshop on Social Media and Health, Stanford, USA
    Title: Towards Health-Aware Food Recommender Systems
  5. 3/2018: Invited Talk at the Algorithm Winter School, Geilo, Norway
    Title: An Introduction to Recommender Systems
  6. 10/2017: Invited Talk at the University of Bergen, Bergen, Norway
    Title: Towards Health-Aware Food Recommender Systems
  7. 07/2017: Invited Talk at the University of Haifa, Haifa, Israel
    Title: Towards Health-Aware Food Recommender Systems
  8. 07/2017: Invited Keynote Talk at the 1st Latin American Workshop on Recommender Systems & Visualisation at Pontificia Universidad Catolica de Chile, Santiago, Chile
    Title: Towards Health-Aware Food Recommender Systems
  9. 04/2017: Paper Presentation at WWW’17, AU
    Title: Investigating the Healthiness of Internet-Sourced Recipes: Implications for Meal Planning and Recommender Systems
  10. 09/2016: Paper Presentation at RecTour WS at RecSys’16, USA
    Title: Understanding the Impact of Weather for POI Recommender Systems
  11. 07/2016: Invited Talk at MODUL University Vienna, Austria
    Title: From Behavioral Analytics to Predictive Modeling on the Web
  12. 05/2016: Invited Talk at University of Southampton, UK
    Title: Understanding, Modeling & Changing Food Patterns on the Web
  13. 11/2015: Invited Talk at TU Delft, Delft Netherlands
    Title: From Behavioral Analytics to Predictive Modeling on the Web
  14. 10/2015: Invited Talk at University of Bolzano, Bolzano, Italy
    Title: Studying Online Food Consumption and Production Patterns: Recent Trends and Challenges
  15. 10/2015: Poster Presentation at DMRS’15, Bolzano, Italy
    Title: Biases in Online Food Recipe Production
  16. 6/2015: Poster Presentation at WWW’15, Florence, Italy
    Title: Temporality in Online Food Recipe Consumption and Production
  17. 1/2015: Invited Talk at Yahoo Trondheim, Trondheim, Norway
    Title: Human Cognition in Recommender Systems
  18. 12/2014: Invited Talk at Graz University of Technology, Graz, Austria
    Title: Twitter in Academic Conferences
  19. 11/2014: Invited Talk at University of Ghent, Ghent, Belgium
    Title: Social Computing in the area of Big Data
  20. 11/2014: Invited Talk at Norwegian University of Science and Technology, Trondheim, Norway
    Title: Social Computing in the area of Big Data
  21. 10/2014: Invited Talk at Yahoo! Research, Barcelona, Spain
    Title: Social Computing in the area of Big Data
  22. 9/2014: Invited Talk at I-Know/EC-TEL’14, Graz, Austria
    Title: Towards a BigData Recommender Engine for Online and Offline Marketplaces
  23. 9/2014: Invited Talk at Pontificia Universidad Catolica de Chile, Santiago, Chile
    Title: Social Computing in the area of Big Data
  24. 9/2014: Paper Presentation at ACM HT’14, Santiago, Chile
    Title: Recommending Items in Social Tagging Systems Using Tag and Time Information
  25. 4/2014: Poster Presentation at WWW’14, Seoul, South Korea
    Title: Who will trade with Whom: Predicting Seller Buyer Interactions through Social Networks
  26. 10/2013: Paper Presentation at ACM CIKM’13, San Francisco, USA
    Title: Recommending Tags with a Model of Human Categorization
  27. 10/2013: Invited Talk at University of Tallinn, Tallinn, Estonia
    Title: An open light-weight framework for social-semantic personalization and recommendation
  28. 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
  29. 2/2013: Invited Talk at Hewlett-Packard, Vienna, Austria
    Title: Why Social Network Research is Good for You!
  30. 9/2012: Paper Presentation at I-Know’12, Graz, Austria
    Title: Pragmatic Evaluation of Concept Hierarchies
  31. 6/2012: Paper Presentation at ACM HT’12, Milwaukee, USA
    Title: Evaluating Tag-Based Information Access in Image Collections
  32. 11/2011: Invited Talk at University of Pittsburgh, Pittsburgh, USA
    Title: Enhancing the Navigability of Social Tagging Systems
  33. 11/2011: Paper Presentation at ICWI’11, Rio de Janero, Brazil
    Title: Social Media Marketing with Facebook: A Case Study
  34. 9/2011: Paper Presentation at I-Know’11, Graz, Austria
    Title: Enhancing the Navigability of Social Tagging Systems with Tag Taxonomies
  35. 8/2011: Invited talk at University of Ohrid, Macedonia
    Title: Networks Navigability: Theory and Applications
  36. 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
  37. 6/2011: Paper Presentation at ICWE’11, Phaphos, Cyprus
    Title: NAVTAG - A Network Theoretic Framework to assess and improve the navigability of tagging systems
  38. 10/2010: Paper Presentation at ICWI’10, Timisoara, Romania
    Title: QueryCloud: Automatically linking related Documents via Search Query (Tag) Clouds
  39. 7/2010: Poster Presentation at ICWE’10, Vienna, Austria
    Title: Linking Related Documents: Combining Tag Clouds and Search Queries
  40. 6/2010: Paper Presentation at IEEE ITI’10, Dubrovnik, Croatia
    Title: Enriching Tagging Systems with Google Query Tags
  41. 6/2010: Paper Presentation at IEEE ITI’10, Dubrovnik, Croatia
    Title: Social Networks and eLearning: New Model for Learning at Workplace

Copyright © 2019 Christoph Trattner (Last updated: January 14th, 2019)