Data mining group
Recent publications
Bruno Ordozgoiti and Aristides Gionis, "Reconciliation k-median: Clustering with non-polarized representatives", the Web Conference 2019 (arxiv)
Cigdem Aslay, Antonis Matakos, Esther Galbrun, and Aristides Gionis, "Maximizing the diversity of exposure in a social network", IEEE International Conference on Data Mining (ICDM) 2018 (arxiv)
Isak Karlsson, Jonathan Rebane, Panagiotis Papapetrou, and Aristides Gionis, "Explainable time series tweaking via irreversible and reversible temporal transformations", IEEE International Conference on Data Mining (ICDM) 2018 (arxiv)
Antonis Matakos and Aristides Gionis, "Tell me something my friends do not know: Diversity maximization in social networks", IEEE International Conference on Data Mining (ICDM) 2018 (arxiv)
Polina Rozenshtein, Francesco Bonchi, Aristides Gionis, Mauro Sozio, and Nikolaj Tatti, "Finding events in temporal networks: Segmentation meets densest-subgraph discovery", IEEE International Conference on Data Mining (ICDM) 2018 (arxiv)
Han Xiao, Cigdem Aslay, and Aristides Gionis, "Robust cascade reconstruction by Steiner-tree sampling", IEEE International Conference on Data Mining (ICDM) 2018 (arxiv)
Cigdem Aslay, Anis Nasir, Gianmarco De Francisci Morales, and Aristides Gionis, "Mining frequent patterns in evolving graphs", ACM International Conference on Information and Knowledge Management (CIKM) 2018 (arxiv)
Florian Adriaens, Tijl De Bie, Aristides Gionis, Jefrey Lijffijt, Polina Rozenshtein, "From acquaintance to best friend forever: robust and fine-grained inference of social-tie strengths", International Workshop on Mining and Learning with Graphs (MLG) 2018 (arxiv)
Eric Malmi, Aristides Gionis, Arno Solin, "Computationally inferred genealogical networks uncover long-term trends in assortative mating", The Web Conference (WWW) 2018 (arxiv)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, Michael Mathioudakis, "Political discourse on social media: Echo chambers, gatekeepers, and the price of bipartisanship", The Web Conference (WWW) 2018 (arxiv)
Han Xiao, Polina Rozenshtein, Nikolaj Tatti, Aristides Gionis, "Reconstructing a cascade from temporal observations", SIAM International Conference on Data Mining (SDM) 2018 (arxiv)
Preethi Lahoti, Kiran Garimella, Aristides Gionis, "Joint non-negative matrix factorization for learning ideological leaning on twitter", ACM International Conference on Web Search and Data Mining (WSDM) 2018 (arxiv)
Kiran Garimella, Aristides Gionis, Nikos Parotsidis, Nikolaj Tatti, "Balancing information exposure in social networks", 31st Annual Conference on Neural Information Processing Systems (NIPS) 2017 (arxiv)
Eric Malmi, Aristides Gionis, Evimaria Terzi, "Active network alignment: A matching-based approach", ACM International Conference on Information and Knowledge Management (CIKM) 2017 (arxiv)
Anis Nasir, Aristides Gionis, Gianmarco De Francisci Morales, Sarunas Girdzijauskas, "Fully dynamic algorithm for top-k densest subgraphs", ACM International Conference on Information and Knowledge Management (CIKM) 2017 (pdf)
Polina Rozenshtein, Nikolaj Tatti, Aristides Gionis, "The network-untangling problem: From interactions to activity timelines", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery (ECML PKDD) 2017 (pdf)
Polina Rozenshtein, Nikolaj Tatti, Aristides Gionis, "Inferring the strength of social ties: a community-driven approach", ACM Conference on Knowledge Discovery and Data Mining (KDD) 2017 (pdf)
Preethi Lahoti, Gianmarco De Francisci Morales, Aristides Gionis, "Finding topical experts in Twitter via query-dependent personalized PageRank", IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM) 2017 (pdf)
Orestis Kostakis, Nikolaj Tatti, Aristides Gionis, "Discovering recurring activity in temporal networks", Data Mining and Knowledge Discovery (DMKD) 2017 (pdf)
Eric Malmi, Sanjay Chawla, Aristides Gionis, "Lagrangian relaxations for multiple network alignment", to appear in the Data Mining and Knowledge Discovery (DMKD) (pdf)
Polina Rozenshtein, Nikolaj Tatti, Aristides Gionis, "Finding dynamic dense subgraphs", to appear in the ACM Transactions on Knowledge Discovery from Data (TKDD) (pdf)
Frederick Ayala-Gómez, Bálint Daróczy, Michael Mathioudakis, András Benczúr, Aristides Gionis, "Where could we go? Recommendations for groups in location-based social networks", International ACM Web Science Conference (WebScience) 2017 (pdf)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, Michael Mathioudakis, "The effect of collective attention on controversial debates on social media", International ACM Web Science Conference (WebScience) 2017 (pdf)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, Michael Mathioudakis, "Factors in recommending contrarian content on social media" (short paper), International ACM Web Science Conference (WebScience) 2017 (pdf)
Kiran Garimella, Orestis Kostakis, Michael Mathioudakis, "Ad-blocking: a study on performance, privacy and counter-measures" (short paper), International ACM Web Science Conference (WebScience) 2017 (pdf, website)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, Michael Mathioudakis, "Polarization on social media" (tutorial), International AAAI Conference on Web and Social Media (ICWSM) 2017 (tutorial website)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, Michael Mathioudakis "The ebb and flow of controversial debates on social media" (short paper), International AAAI Conference on Web and Social Media (ICWSM) 2017 (pdf, poster, website)
Mauro Coletto, Kiran Garimella, Aristides Gionis, Claudio Lucchese, "A motif-based approach for identifying controversy" (short paper), International AAAI Conference on Web and Social Media (ICWSM) 2017 (pdf, poster)
Kiran Garimella, Ingmar Weber, "A long-term analysis of polarization on twitter" (short paper), International AAAI Conference on Web and Social Media (ICWSM) 2017 (pdf, poster, website)
Kiran Garimella, Han Xiao, "Media attention to science" (poster), World Wide Web conference (WWW) 2017 (pdf, poster, website)
Hieu Nguyen, Kiran Garimella, "Understanding international migration using tensor factorization" (poster), World Wide Web conference (WWW) 2017 (arxiv, poster, website)
Eric Malmi, Marko Rasa, Aristides Gionis, "AncestryAI: a tool for exploring computationally inferred family trees" (demo), World Wide Web conference (WWW) 2017 (pdf, demo)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, Michael Mathioudakis, "Exposing twitter users to contrarian news" (demo), World Wide Web conference (WWW) 2017 (pdf, poster, demo)
Aristides Gionis, Michael Mathioudakis, Antti Ukkonen, "Bump hunting in the dark: Local discrepancy maximization on graphs", IEEE Transactions of Knowledge Engineering (TKDE), 29(3), 2017 (pdf)
Aristides Gionis, Polina Rozenshtein, Nikolaj Tatti, and Evimaria Terzi, "Community-aware network sparsification", SIAM International Conference on Data Mining (SDM) 2017 (arxiv version)
Esther Galbrun, Behzad Golshan, Aristides Gionis, and Evimaria Terzi, "Finding low-tension communities", SIAM International Conference on Data Mining (SDM) 2017 (arxiv version)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, and Michael Mathioudakis, "Reducing controversy by connecting opposing views", ACM International Conference on Web Search and Data Mining (WSDM) 2017 (arxiv version, poster)
Albert Arockiasamy, Aristides Gionis, and Nikolaj Tatti, "A combinatorial approach to role discovery", IEEE International Conference on Data Mining (ICDM) 2016 (pdf)
Darshan M.S., Gianmarco De Francisci Morales, and Aristides Gionis, "Extracting skill endorsements from personal communication data", ACM International Conference on Information and Knowledge Management (CIKM) 2016 (pdf)
Polina Rozenshtein, Aristides Gionis, "Temporal PageRank", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery (ECML PKDD) 2016 (pdf)
Han Xiao, Polina Rozenshtein, Aristides Gionis, "Discovering topically- and temporally-coherent events in interaction networks", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery (ECML PKDD) 2016 (pdf)
François Petitjean, Tao Li, Nikolaj Tatti, Geoffrey I. Webb, "Skopus: Mining top-k sequential patterns under leverage", Data Mining and Knowledge Discovery (DMKD) 2016 (Springer link)
Polina Rozenshtein, Aristides Gionis, B. Aditya Prakash, Jilles Vreeken, "Reconstructing an epidemic over time", ACM Conference on Knowledge Discovery and Data Mining (KDD) 2016 (2-min video preview, pdf)
Eric Malmi, Pyry Takala, Hannu Toivonen, Tapani Raiko, Aristides Gionis, "DopeLearning: A computational approach to rap lyrics generation", ACM Conference on Knowledge Discovery and Data Mining (KDD) 2016 (2-min video preview, arxiv)
Esther Galbrun, Aristides Gionis, Nikolaj Tatti, "Top-k overlapping densest subgraphs", to appear in the Journal of Data Mining and Knowledge Discovery (DMKD) 2016 (pdf of authors' copy; the final publication will be available at link.springer.com)
Gianmarco De Francisci Morales, Aristides Gionis, "Streaming similarity self-join", to appear in the International Conference on Very Large Databases (VLDB) 2016 (arxiv)
Eric Malmi, Ingmar Weber, "You are what apps you use: Demographic prediction based on user's apps", International AAAI Conference on Web and Social Media (ICWSM) 2016 (arxiv)
Emre Çelikten, Géraud Le Fahler, Michael Mathioudakis, "What is the city but the people? Exploring urban activity using social web traces" (demo), World Wide Web conference (WWW) 2016 (pdf)
Kiran Garimella, Aboud Alfayad, Ingmar Weber, "Social media image analysis for public health", Human-Computer Interaction (CHI) 2016 (arxiv)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, and Michael Mathioudakis, "Exploring controversy on twitter" (demo), Computer-Supported Cooperative Work and Social Computing (CSCW) 2016 (arxiv)
Sanjay Chawla, Kiran Garimella, Aristides Gionis, Dominic Tsang, "Discovering the network backbone from traffic activity data", Pacific Asia Knowledge Discovery and Data Mining (PAKDD) 2016 (arxiv)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, and Michael Mathioudakis, "Quantifying controversy in social media", ACM International Conference on Web Search and Data Mining (WSDM) 2016 (pdf)
Nikolaj Tatti, "Ranking episodes using a partition model", Data Mining Knowledge Discovery (DMKD) 2015 (pdf)
Nikolaj Tatti, "Hierachies in directed networks", IEEE International Conference on Data Mining (ICDM) 2015 (pdf)
Charalampos Mavroforakis, Michael Mathioudakis, Aristides Gionis, "Absorbing random-walk centrality: Theory and algorithms", IEEE International Conference on Data Mining (ICDM) 2015 (arxiv)
Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, Mauro Sozio, "Scalable facility location for massive graphs on pregel-like systems", International Conference on Information and Knowledge Management (CIKM) 2015 (pdf)
Nicolas Kourtellis, Gianmarco De Francisci Morales, Francesco Bonchi, "Scalable online betweenness centrality in evolving graphs", IEEE Transactions on Knowledge and Data Engineering (TKDE) 2015
Ehsan Amid, Aristides Gionis, Antti Ukkonen, "A kernel-learning approach to semi-supervised clustering with relative distance comparisons", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD) 2015 (pdf)
Rohit Kumar, Toon Calders, Aristides Gionis, Nikolaj Tatti, "Maintaining sliding-window neighborhood profiles in interaction networks", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD) 2015 (full version)
Eric Malmi, Arno Solin, Aristides Gionis, "The blind leading the blind: Network-based location estimation under uncertainty", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD) 2015 (pdf)
Albert Bifet, Gianmarco De Francisci Morales, Jesse Read, Bernhard Pfahringer and Geoff Holmes, "Efficient online evaluation of big data stream classifiers", ACM Conference on Knowledge Discovery and Data Mining (KDD) 2015
Géraud Le Fahler, Michael Mathioudakis, Aristides Gionis, "Where is the Soho of Rome? Measures and algorithms for finding similar neighborhoods in cities", International Conference on Web and Social Media (ICWSM) 2015 (pdf)
Karmen Dykstra, Jefrey Lijffijt, Aristides Gionis, "Covering the egonet: A crowdsourcing approach to social circle discovery on twitter", International Conference on Web and Social Media (ICWSM) 2015 (pdf)
Orestis Kostakis and Panagiotis Papapetrou, "Finding the longest common sub-pattern in sequences of temporal intervals", Data Mining and Knowledge Discovery (DMKD) 2015 (pdf of authors' copy; the final publication is available at link.springer.com)
Eric Malmi, Nikolaj Tatti, Aristides Gionis, "Beyond rankings: comparing directed acyclic graphs", Data Mining and Knowledge Discovery (DMKD) 2015 (pdf of authors' copy; the final publication is available at link.springer.com)
Nikolaj Tatti and Aristides Gionis, "Density-friendly graph decomposition", International World Wide Web Conference (WWW) 2015 (pdf)
Anis Nasir, Gianmarco De Francisci Morales, David Garcia-Soriano, Nicolas Kourtellis, Marco Serafini, "The power of both choices: Practical load balancing for distributed stream processing engines", IEEE International Conference on Data Engineering (ICDE) 2015
Aristides Gionis, Michael Mathioudakis, Antti Ukkonen, "Bump hunting in the dark: Local discrepancy maximization on graphs", IEEE International Conference on Data Engineering (ICDE) 2015 (pdf)
Boris Cule, Nikolaj Tatti, Bart Goethals, "MARBLES: Mining association rules buried in long event sequences", Statistical Analysis and Data Mining 2014
Polina Rozenshtein, Nikolaj Tatti, Aristides Gionis, "Discovering dynamic communities in interaction networks", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD) 2014 (best student paper award, pdf)
Nikolaj Tatti, "Faster way to agony: Discovering hierarchies in directed graphs", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD) 2014 (pdf)
Kiran Garimella, Ingmar Weber, "Co-following on twitter", ACM Conference on Hypertext and Social Media (HyperText) 2014 (pdf)
Orestis Kostakis, "Classy: Fast clustering streams of call-graphs", Data Mining and Knowledge Discovery (DMKD) 2014 (pdf)
Nikolaj Tatti, "Discovering episodes with compact minimal windows", Data Mining and Knowledge Discovery (DMKD) 2014 (pdf)
Nikolaj Tatti, "Discovering bands from graphs", Data Mining and Knowledge Discovery (DMKD) 2014 (pdf)
Hao Wu, Jilles Vreeken, Nikolaj Tatti, Naren Ramakrishnan, "Uncovering the plot: Detecting surprising coalitions of entities in multi-relational schemas", Data Mining and Knowledge Discovery (DMKD) 2014 (pdf)
Jussi Korpela, Kai Puolamaki, Aristides Gionis "Confidence bands for time series data", Data Mining and Knowledge Discovery (DMKD) 2014 (pdf)
Esther Galbrun, Aristides Gionis, Nikolaj Tatti, "Overlapping community detection in labeled graphs", Data Mining and Knowledge Discovery (DMKD) 2014 (preprint)
Polina Rozenshtein, Aris Anagnostopoulos, Aristides Gionis, Nikolaj Tatti, "Event detection in activity networks", ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD) 2014 (pdf)
Hongyu Su, Aristides Gionis, Juho Rousu, "Structured prediction of network response", International Conference on Machine Learning (ICML) 2014 (pdf)
Nikolaj Tatti, "Fast sequence segmentation using log-linear models", Data Mining and Knowledge Discovery (DMKD) 2013 (pdf)
Gianmarco De Francisci Morales, Francesco Bonchi, Aristides Gionis, Antti Ukkonen, "Activity preserving graph simplification", Data Mining and Knowledge Discovery (DMKD) 2013 (pdf)
Jefrey Lijffijt, Panagiotis Papapetrou, Kai Puolamäki, "A statistical significance testing approach to mining the most informative set of patterns", Data Mining and Knowledge Discovery (DMKD) 2013 (springer link)
Nikolaj Tatti, Fabian Moerchen, Toon Calders, "Finding robust itemsets under subsampling", ACM Transactions on Database Systems (TODS) 2013 (pdf)
Nikolaj Tatti and Aristides Gionis, "Discovering nested communities", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD) 2013 (pdf)
Jefrey Lijffijt, "A fast and simple method for mining subsequences with surprising event counts", European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD) 2013 (preprint)
Aristides Gionis, Flavio Junqueira, Vincent Leroy, Marco Serafini, Ingmar Weber, "Piggybacking on social networks", Proceedings of VLDB 2013 (pdf)
Charalampos Tsourakakis, Francesco Bonchi, Aristides Gionis, Francesco Gullo, Maria Tsiarli, "Denser than the densest subgraph: Extracting optimal quasi-cliques with quality guarantees", ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD) 2013 (pdf)
Konstantin Kutzkov, Albert Bifet, Francesco Bonchi, Aristides Gionis, "STRIP: Stream learning of influence probabilities", ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD) 2013 (pdf)
Mahashweta Das, Gianmarco De Francisci Morales, Aristides Gionis, Ingmar Weber, "Learning to question: Leveraging user preferences for shopping advice", ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD) 2013 (pdf)
Eduardo Ruiz, Vagelis Hristidis, Carlos Castillo, Aristides Gionis, "Measuring and summarizing movement in microblog postings", International AAAI Conference on Weblogs and Social Media (ICWSM) 2013
Aristides, Gionis, Evimaria Terzi, Panayiotis Tsaparas, "Opinion maximization in social networks", SIAM International Conference on Data Mining (SDM) 2013 (arxiv version)
Leman Akoglu, Jilles Vreeken, Hanghang Tong, Duen Horng Chau, Nikolaj Tatti, Christos Faloutsos, "Mining connection pathways for marked nodes in large graphs" SIAM International Conference on Data Mining (SDM) 2013 (pdf)
Sanjay Chawla and Aristides Gionis, "k-means--: A unified approach to clustering and outlier detection", SIAM International Conference on Data Mining (SDM) 2013 (pdf)