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REVEAL | September 30, 2023

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REVEAL develops state of the art technologies and methodologies in Social Media analysis with a focus on verification of content. Here you will find all publications that the Reveal consortium produces during the project.  


2016 (and 2017)

  • “Assessing Trustworthiness in Social Networks using Run-Time Event Recognition.” By Christos Vlassopoulos, Alexander Artikis and Georgios Paliouras. Proceedings of International Workshop on Mining Actionable Insights from Social Netwoks. 6-10 February 2017, Cambridge, UK. Publication forthcoming.
  • “A web-based service for disturbing image detection.” By Markos Zampoglou, Symeon Papadopoulos, Yiannis Kompatsiaris and Jochen Spangenberg. Accepted conference paper for MMM2017, the 23rd International Conference on Multimedia Modeling. 4-6 January 2017, Reykjavik, Iceland. Publication forthcoming (currently available here).
  • Liability under EU Data Protection Law: From Directive 95/46 to the General Data Protection Regulation. By Brendan Van Alsenoy. JIPITEC 7 (3) 2016. Available here.
  • “Short Guide to Gamification Findings of the Reveal Project and Practical Application in Enterprise Online Communities.” By Dorchain, Marc, Strobel, Gabriele and Scheid, Martin. December 2016. Available at SSRN here.
  • “Trust and Distrust in Online Fact-Checking Services.” By Brandtzaeg, P.B., & Følstad, A. (Accepted for publication). Communications of the ACM.
  • “Verifying Multimedia Use at MediaEval 2016” By Boididou, C., Middleton, S.E., Papadopoulos, S., Dang-Nguyen, D.T., Riegler, M., Boato, G., Petlund, A., Kompatsiaris, Y., MediaEval 2016 workshop, Hilversum, Netherlands, October 2016.
  • “The VMU Participation @ Verifying Multimedia Use 2016” By Boididou, C. Papadopoulos, S. Middleton, S.E. Nguyen, D.T.D. Riegler, M. Petlund, A. Kompatsiaris, Y. MediaEval 2016 workshop, Hilversum, Netherlands, October 2016.
  • “Placing Images with Refined Language Models and Similarity Search with PCA-reduced VGG Features” By Kordopatis-Zilos, G., Popescu, A., Papadopoulos, S. Kompatsiaris, Y., MediaEval 2016 workshop, Hilversum, Netherlands, October 2016.
  • In-depth Exploration of Geotagging Performance using Sampling Strategies on YFCC100M” By Kordopatis-Zilos, G., Papadopoulos, S., Kompatsiaris, Y., Proceedings of the 2016 ACM Workshop on Multimedia COMMONS, pp. 3-10, ACM, New York, NY.
  • “Did the Romans get it right? What Delfi, Google, eBay, and UPC TeleKabel Wien have in common.” By P. Valcke, A. Kuczerawy, PJ Ombelet. Chapter in Taddeo, Mariarosaria, Floridi, Luciano (Eds.): The Responsibilities of Online Service Providers, Springer International Publishing 2017 (forthcoming). Already available on SSRN here.
  • “Supervising Automated Journalists in the Newsroom: Liability for Algorithmically Produced News Stories.” By PJ. Ombelet, A. Kuczerawy, P. Valcke, Forthcoming in Revue du Droit des Technologies de l’Information (Fall 2016). Available here.
  • “Predicting User Roles in Social Networks using Transfer Learning with Feature Transformation”. By Sun, J., Kunegis, J., & Staab, S. (2016). Accepted paper of the ICDM International Workshop on Data Mining in Networks in Barcelona, 12 December 2016.
  • “Young journalists and networked individualism: Time collapse among younger journalists in social media.” By Brandtzaeg, P.B., & Chaparro Domínguez, M, A.. Accepted paper of ECREA the 6th European Communication Conference, Prague, 9-12 November 2016.
  • “Social media users’ perception of the trustworthiness and usefulness of online fact-checking services”. By Brandtzaeg, P.B., & Følstad, A. (2016). Accepted paper of the International Symposium on Media Innovations in Oslo, 13-14 October 2016.
  • “Author Profiling using Complementary Second Order Attributes and Stylometric Features”. By Konstantinos Bougiatiotis and Anastasia Krithara. Working Notes of CLEF 2016 – Conference and Labs of the Evaluation forum. Évora, Portugal, 5-8 September, 2016. Full version available here.
  • “Towards Dynamic Classification Completeness in Twitter”. By Dimitrios Milioris. IEEE European Signal Processing Conference, Aug 2016, Budapest, Hungary. Paper available here.
  • “An exploratory analysis of news trends on twitter”. By Konstantinos Bougiatiotis, Anastasia Krithara, Georgios Paliouras and George Giannakopoulos. In Natural Language Processing meets Journalism Workshop, International Joint Conference on Artificial Intelligence 2016. USA, New York City, 10 July, 2016.
  • “Unsupervised Classification in Twitter based on Joint Complexity”. By Dániel Kondor, Dimitrios Milioris. International Conference on Computational Social Science (ICCSS), Jun 2016, Chicago, USA. Paper available here.
  • “Topic Detection Completeness in Twitter: Is it Possible?”. By Dimitrios Milioris, Dániel Kondor. International Conference on Computational Social Science (ICCSS), June 2016, Chicago, USA. Paper available here.
  • ”Dynamic graph management for streaming social media analytics“. By Christos Vlassopoulos, Ioannis Kontopoulos, Michail Apostolou, Alexander Artikis and Dimitrios Vogiatzis. In proceeding of the International Conference on Distributed and Event-based systems (DEBS), June 2016.
  • “Emerging journalistic verification practices concerning social media.” By Brandtzaeg, P.B., Lüders, M., Spangenberg, J., Rath-Wiggins, L., & Følstad, A. Journalism Practice (2016). 10(3), 323-342. Open access version available here. (An online version was first published in 2015)
  • “Online Learning of Event Definitions”. By Nikos Katzouris, Alexander Artikis and Georgios Paliouras. To appear in Theory and Practice of Logic Programming (TPLP), special issue for the 32nd International Conference on Logic Programming (ICLP 2016), New York City, USA. Accepted Paper available here.
  • “A Large-Scale Evaluation of Splicing Localization Algorithms for Web Images”. By M. Zampoglou, S. Papadopoulos and Y. Kompatsiaris. In: Multimedia Tools and Applications (special issue on Recent Advances in Multimedia Security: Biometrics & Forensics). Accompanying code available here.
  • “Predicting News Popularity by Mining Online Discussions”. By Georgios Rizos, Symeon Papadopoulos, and Yiannis Kompatsiaris. In Proceedings of the 25th International Conference Companion on World Wide Web (WWW ’16 Companion). 2016. International World Wide Web Conferences Steering Committee, Republic and Canton of Geneva, Switzerland, 737-742. Paper available here.
  • “Veracity and Velocity of Social Media Content during Breaking News: Analysis of November 2015 Paris Shootings” By Wiegand, S. Middleton, S.E.. Third Workshop on Social News On the Web (SNOW-2016), WWW 2016, Companion of the 25th International World Wide Web Conference (2016). Paper available here.
  • “Geoparsing and Geosemantics for Social Media: Spatio-Temporal Grounding of Content Propagating Rumours to support Trust and Veracity Analysis during Breaking News”. By S. Middleton and V Krivcovs. ACM Transactions on Information Systems, (TOIS) – Special Issue on Trust and Veracity of Information in Social Media. Volume 34, Issue 3, May 2016. 26 pages. DOI=10.1145/2842604. Paper available here. It can also be downloaded for free here.
  • “Overview of the Special Issue on Trust and Veracity of Information in Social Media.” By Symeon Papadopoulos, Kalina Bontcheva, Eva Jaho, Mihai Lupu, and Carlos Castillo. ACM Trans. Inf. Syst. 34, 3, Article 14 (April 2016). Paper available here.
  • “Classification Encryption via Compressed Permuted Measurement Matrices.” By Dimitrios Milioris. IEEE International Workshop on Security and Privacy in Big Data (BigSecurity), INFOCOM , Apr 2016, San Francisco, USA. Paper available here.
  • “Image Forensics on the Web and Social Media for News Professionals.” By M.  Zampoglou, S. Papadopoulos, Y. Kompatsiaris, R. Bouwmeester, J. Spangenberg. In Proceedings of SMNews at ICWSM 2016. Paper available here.


  • “LiveRank: How to Refresh Old Datasets.” The Dang Huynh, Fabien Mathieu, Laurent Viennot. Internet Mathematics, Taylor & Francis, 2015. <DOI: 10.1080/15427951.2015.1098756>. Paper available here.
  • “Multimodal Graph-based Event Detection and Summarization in Social Media Streams”. By M. Schinas, S. Papadopoulos, G. Petkos, Y. Kompatsiaris, P. Mitkas. In Proceedings of ACM Multimedia 2015. Paper available here.
  • “Media REVEALr: A social multimedia monitoring and intelligence system for Web multimedia verification.” By K. Andreadou, S. Papadopoulos, L. Apostolidis, A. Krithara, Y. Kompatsiaris. In Proceedings of PA-KDD workshop PAISI 2015. Paper available here.  Slides available here.
  • “Geotagging Social Media Content with a Refined Language Modelling Approach.” By G. Kordopatis-Zilos, S. Papadopoulos, Y. Kompatsiaris. In Proceedings of PA-KDD workshop PAISI 2015 . Paper available here. Slides available here.
  • “Visual Event Summarization on Social Media using Topic Modelling and Graph-based Ranking Algorithms.” By E. Schinas, S. Papadopoulos, Y. Kompatsiaris, P. Mitkas. In Proceedings of ICMR 2015. Paper available here. 
  • “Predicting Elections for Multiple Countries Using Twitter and Polls”. IEEE Intelligent Systems. By A. Tsakalidis, S. Papadopoulos, A. Cristea, Y. Kompatsiaris. Paper available here. 
  • “Learning to detect concepts with Approximate Laplacian Eigenmaps in large-scale and online settings”. By E. Mantziou, S. Papadopoulos, Y. Kompatsiaris. International Journal of Multimedia Retrieval, Springer. Paper available here. 
  • “Web image size prediction for efficient focused image crawling”. In Proceedings of CBMI 2015. By K. Andreadou, S. Papadopoulos, Y. Kompatsiaris. Paper available here. Slides available here.  More information in a blog post here. 
  • “News-oriented multimedia search over multiple social networks”. In Proceedings of CBMI 2015. By K. Iliakopoulou, S. Papadopoulos, Y. Kompatsiaris. Paper available here. Slides available here. 
  • “CERTH/CEA LIST at MediaEval Placing Task 2015”. By G. Kordopatis-Zilos, A. Popescu, S. Papadopoulos, Y. Kompatsiaris. In Proceedings of MediaEval 2015. Paper available here. Slides available here. 
  • “The CERTH-UNITN Participation @ Verifying Multimedia Use 2015”. By C. Boididou, S. Papadopoulos, D.-T. Dang-Nguyen, G. Boato, Y. Kompatsiaris. In Proceedings of MediaEval 2015. Paper available here.
  • “Detecting image splicing in the wild Web”. By M. Zampoglou, S. Papadopoulos, Y. Kompatsiaris. In Proceedings of ICME 2015 Workshop on Web Multimedia Verification (WeMuV 2015). Paper available here. Slides available here. 
  • “Verifying Multimedia Use at MediaEval 2015”. By C. Boididou, K. Andreadou, S. Papadopoulos, D.-T. Dang-Nguyen, G. Boato, M. Riegler, Y. Kompatsiaris. In Proceedings of MediaEval 2015.
  • “Extracting Attributed Verification and Debunking Reports from Social Media: MediaEval-2015 Trust and Credibility Analysis of Image and Video.” By Stuart E. Middleton. A presentation and a paper published as part of the MediaEval-2015 challenge in Wurzen, Germany
  • “The Evolving Role of the Individual Under EU Data Protection Law.” By Brendan Van Alsenoy. Published in ICRI Research Paper 23, August 10, 2015. Only available on SSRN.
  • “Topic Detection and Compressed Classification in Twitter.” By Dimitrios Milioris, Philippe Jacquet. IEEE European Signal Processing Conference, Aug 2015, Nice, France. Paper available here.
  • “REVEAL Project – Trust and Credibility Analysis”, By Stuart E. Middleton. A presentation held at RDSM-2015. A WWW-2015 workshop in Florence, Italy
  • Semi-Supervised Learning of Event Calculus Theories. By Nikos Katzouris , Alexander Artikis  and Georgios Paliouras. Proceedings of the Doctoral Consortium of ECML/PKDD 2015.
  • “Intermediary Liability & Freedom of Expression: Recent Developments in the EU Notice & Action Initiative”. By Aleksandra Kuczerawy. Published in Computer Law and Security Review, Vol 31. Issue 1 2015, pages 46- 56. Available here.
  • “Emerging Journalistic Verification Practices Concerning Social Media.” By Petter Bae Brandzæg, Marika Lüders, Jochen Spangenberg, Linda Rath-Wiggins and Asbjørn Følstad. Published in Journalism Practice (2015), DOI:10.1080/17512786.2015.1020331. Available as open access here.
  • “Classification in Twitter via Compressive Sensing.” By Dimitrios Milioris. IEEE International Conference on Computer Communications (INFOCOM), Short Paper, Apr 2015, Hong Kong, SAR China. Paper available here.
  • “NoC Online Intermediaries Case Studies Series: European Union and Google Spain.” By Aleksandra Kuczerawy; Jef Ausloos (2015). Paper published here.
  • “Determining Influential Users with Supervised Random Walks.” By Georgios Katsimpras, Dimitrios Vogiatzis and Georgios Paliouras. In proceedings of the 6th International Workshop on Modeling Social Media – Behavioral Analytics in Social Media, Big Data and the Web. Paper published here (see section: Accepted papers).


  • “Tweet Type, Location and Popularity: Case Study Hurricane Sandy”, by Amanda Karavolia, Dimitrios Vogiatzis, Brandon Truong, Andrea Tapia, Cornelia Caragea, Anna Squicciarini and Georgios Paliouras. In proceedings of the 2014 KDD Workshop on Learning about Emergencies from Social Information, Aug 24th 2014. Paper published here.
  • “Focused Exploration of Geospatial Context on Linked Open Data”, by Gottron, Thomas; Schmitz, Johannes; Middleton, Stuart E. (2014). In: IESD’14: Workshop on Intelligent Exploration of Semantic Data.
  • “A Unified Model for Socially Interconnected Multimedia-Enriched Objects”, by Theodora Tsikrika, Katerina Andreadou, Anastasia Moumtzidou, Emmanouil Schinas, Symeon Papadopoulos, Stefanos Vrochidis, Yiannis Kompatsiaris. Paper accepted for 21th Multimedia Modelling Conference (MMM2015).
  • “Alethiometer: a Framework for Assessing Trustworthiness and Content Validity in Social Media”, by Eva Jaho, Efstratios Tzoannos, Aris Papadopoulos and Nikos Sarris. Paper published in WWW’14 Companion, April 7–11, 2014, Seoul, Korea. ACM 978-1-4503-2745-9/14/04. (Abstract here)
  • “News from the Crowd: Grassroots and Collaborative Journalism in the Digital Age”, by Jochen Spangenberg and Nicolaus Heise. Paper published in WWW’14 Companion, April 7–11, 2014, Seoul, Korea. ACM 978-1-4503-2745-9/14/04. (Abstract here)
  • “Social media as a trustworthy news source: Exploring journalists’ working practices concerning social media“ by Brandtzæg, P.B., Lüders, M., Spangenberg, J., Rath-Wiggins, L., & Følstad, A. (2014). Paper presented at The International Symposium on Media Innovations. April, 24-25, 2014. Oslo. [Received Conference Best Paper Award]. The paper was also presented in a research news outlet in Norway entitled “Can we trust news on Twitter?” on 26th of April, 2014. Retrieved from
  • “Joint Sequence Complexity Analysis: Application to Social Networks Information Flow.” By Dimitrios Milioris, Philippe Jacquet. Bell Labs Technical Journal, Wiley, 2014, 18 (4), pp.75-88. Paper available here.
  • “Compressed Sensing Classification in Online Social Networks.” By Dimitrios Milioris. Columbia University, New York. 2014. Paper available here.
  • “Analysis of schema structures in the Linked Open Data graph based on unique subject URIs, pay-level domains, and vocabulary usage” by Thomas Gottron, Malte Knauf, Ansgar Scherp. In: Distributed and Parallel Databases, Springer, 2014, pp.1-39. 10.1007/s10619-014-7143-0
  • “One day in Twitter: Topic detection via Joint Complexity.” By Gerard Burnside, Dimitrios Milioris, Philippe Jacquet. Proceedings of Snow Data Challenge, WWW’14 conference, pp.41-48. The paper achieved the 3rd prize/award of the SNOW data challenge. Paper available here.
  • “A Generalized Language Model as the Combination of Skipped n-grams and Modified-Kneser Ney Smoothing.” By Rene Pickhardt, Thomas Gottron, Martin Körner, Paul Wagner, Till Speicher, Steffen Staab. ACL’14: Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics, 2014 (forthcoming).
  • “Perplexity of Index Models over Evolving Linked Data.” By Thomas Gottron, Christian Gottron. ESWC’14: Proceedings of the Extended Semantic Web Conference, Springer, 2014, pp. 161-175. 10.1007/978-3-319-07443-6_12.
  • “Providing Alternative Declarative Descriptions for Entity Sets using Parallel Concept Lattices.” By Thomas Gottron, Ansgar Scherp, Stefan Scheglmann. ESWC’14: Proceedings of the Extended Semantic Web Conference, Springer, 2014, pp. 364-379. 10.1007/978-3-319-07443-6_31.
  • “Survey on Common Strategies of Vocabulary Reuse in Linked Open Data Modeling” by Johann Schaible, Thomas Gottron, Ansgar Scherp. At ESWC’14: Proceedings of the Extended Semantic Web Conference, Springer, 2014, pp. 457-472. 10.1007/978-3-319-07443-6_31.
  • “An Investigation of HTTP Header Information for Detecting Changes of Linked Open Data Sources” by Renata Dividino, Andre Kramer, Thomas Gottron. ESWC’14: Proceedings of the Extended Semantic Web Conference, 2014 (forthcoming).
  • “Of Sampling and Smoothing: Approximating Distributions over Linked Open Data.” By Thomas Gottron. PROFILES’14: Proceedings of the Workshop on Dataset Profiling and Federated Search for Linked Data, 2014. Paper available here.
  • “From Changes to Dynamics: Dynamics Analysis of Linked Open Data Sources.” By Renata Dividino, Thomas Gottron, Ansgar Scherp, Gerd Gröner. PROFILES’14: Proceedings of the Workshop on Dataset Profiling and Federated Search for Linked Data, 2014. Paper available here.


  • “Influence Study on Hyper-Graphs. By Dimitrios Vogiatzis. Proceedings of the AAAI Fall Symposium 2013 on Social Networks and Social Contagion, Arlington, Nov 2013. Paper available here.