My name is Kostas Stefanidis and I am an Associate Professor at the Faculty of Information Technology and Communication Sciences (ITC) of the Tampere University, Finland.
Prior to that, I was a research scientist with the Information Systems Lab of ICS-FORTH, Greece, and a postdoctoral researcher at the IDI Dept. of NTNU in Norway and the CSE Dept. of CUHK in Hong Kong. I got my PhD in personalized data management from the Univ. of Ioannina, Greece.
My research interests are in the broader area of big data. They lie in the intersection of databases, information retrieval, data mining and the Web, and include personalization and recommender systems, large-scale entity resolution and information integration, and query and data exploration paradigms, including keyword search and opinion mining techniques.
I have been involved in several international research projects and co-authored more than 80 papers in peer-reviewed conferences and journals, including ACM SIGMOD, IEEE ICDE, EDBT and ACM TODS. I am also actively serving the scientific community. Currently, I am a Steering Committee Member for the Workshop on Exploratory Search in Databases and the Web (ExploreDB), in conjunction with ACM SIGMOD, the General co-Chair of the Workshop on Semantic Web Technologies for Health Data Management, co-located with ISWC, and the Registration Chair of CIKM 2018. I served also as the Web & Information Chair of SIGMOD/PODS 2016 and the Proceedings Chair of EDBT/ICDT 2016.

E-mail: konstantinos.stefanidis -at- tuni.fi

DOLAP 2021 - Call for papers
Abstract submission: November 23, 2020
Paper submission: November 30, 2020

Group on Recommender Systems at Tampere University




V. Christophides, V. Efthymiou, and K. Stefanidis. Entity Resolution in the Web of Data. Synthesis Lectures on The Semantic Web: Theory and Technology, Morgan and Claypool, August 2015.


S. Kumpulainen, H. Keskustalo, B. Zhang and K. Stefanidis. Historical Reasoning in Authentic Research Tasks: Mapping Cognitive and Document Spaces. Journal of the Association for Information Science and Technology, vol. 71, no. 2 (2020)
P. Fafalios, V. Iosifidis, K. Stefanidis and E. Ntoutsi. Tracking the History and Evolution of Entities: Entity-centric Temporal Analysis of Large Social Media Archives. Springer International Journal on Digital Libraries, 2018
V. Efthymiou, G. Papadakis, G. Papastefanatos, K. Stefanidis and T. Palpanas. Parallel Meta-blocking for Scaling Entity Resolution over Big Heterogeneous Data. Elsevier Information Systems, 65:137-157 (2017)
V. Efthymiou, K. Stefanidis and V. Christophides. Benchmarking Blocking Algorithms for Web Entities. IEEE Transactions on Big Data.


T. Brasileiro Araújo, K. Stefanidis, C. Eduardo Santos Pires, J. Nummenmaa and T. Pereira da Nóbrega. Schema-agnostic Blocking for Streaming Data. Proceedings of ACM SAC 2020. [Local copy]
M. Stratigi, J. Nummenmaa, E. Pitoura and K. Stefanidis. Fair Sequential Group Recommendations. Proceedings of ACM SAC 2020. [Local copy]
V. Efthymiou, G. Papadakis, K. Stefanidis and V. Christophides. MinoanER: Schema-Agnostic, Non-Iterative, Massively Parallel Resolution of Web Entities. Proceedings of EDBT 2019. [Local copy]
G. Troullinou, H. Kondylakis, K. Stefanidis and D. Plexousakis. Exploring RDF/S KBs Using Summaries. Proceedings of ISWC 2018. [Local copy]

Professional Activities

SWH 2019: International Workshop on Semantic Web Meets Health Data Management, co-located with ISWC, Auckland, New Zealand, October, 2019. [General co-Chair]
CIKM 2018: International Conference on Information and Knowledge, Lingotto, Turin, Italy, October 22-26, 2018. [Registration Chair]
SWH 2018: International Workshop on Semantic Web Technologies for Health Data Management, co-located with ISWC, Monterey, California, USA, October 9, 2018. [General co-Chair]
ExploreDB 2018: International Workshop on Exploratory Search in Databases and the Web, co-located with SIGMOD/PODS, Houston, TX, USA, June 15, 2018. [General co-Chair]
SIGMOD/PODS 2016: ACM International Conference on Management of Data, San Francisco, USA, June 26 - July 1, 2016. [Web/Information Chair]
EDBT/ICDT 2016: International Conference on Extending Database Technology, Bordeaux, France, 2016. [Proceedings Chair]

Contact Information

Kostas Stefanidis (official name: Konstantinos Stefanidis)
Associate Professor

Faculty of Information Technology and Communication Sciences (ITC)
Tampere University, Finland

Room: PINNI B2052

E-mail: konstantinos.stefanidis -at- tuni.fi