Manuscripts under review

Optimal Workload-Aware Materialization of Junction Trees. With Martino Ciaperoni, Cigdem Aslay, Aristides Gionis.

GRMR: Generalized Regret-Minimizing Representatives. With Yanhao Wang, Yuchen Li, Kian-Lee Tan. [arXiv]

Joint Use of Node Features and Proximity for Semi-Supervised Classification on Graphs. With Arpit Merchant. [arXiv]

Intersectional Affirmative Action Policies for Top-k Candidates Selection. With Carlos Castillo, Giorgio Barnabo, Sergio Celis. [arXiv]

Published articles + Workshop papers, posters, tutorials

Workload-aware materialization for efficient variable elimination on Bayesian networks. With Cigdem Aslay, Martino Ciaperoni, Aristides Gionis. IEEE International Conference on Data Engineering (ICDE). 2021. [arXiv]

Streaming Submodular Maximization with Fairness Constraints. With Yanhao Wang, Francesco Fabbri. The Web Conference. 2021. [arXiv]

Evaluating Decision Makers over Selectively Labelled Data: A Causal Modelling Approach. With Riku Laine, Antti Hyttinen. International Conference on Discovery Science. 2020. [pdf]
Best Paper Award.

Graph Summarization and Graph Embeddings: Towards A Spectral Connection. With Arpit Merchant. MLG@KDD. 2020. [YouTube 1min]

Towards Data-Driven Affirmative Action Policies under Uncertainty. With Corina Hertweck, Carlos Castillo. FATED@EDM. 2020. [arXiv]

City of Citizens: shaping urban landscape through big data. With G. Andrienko, F. Giannoti, A. Gionis, International Journal of Data Science and Analytics. 2020.

Affirmative Action Policies for Top-k Candidates Selection, With an Application to the Design of Policies for University Admissions. With Carlos Castillo, Giorgio Barnabo, Sergio Celis. ACM Symposium of Applied Computing. 2020. [arXiv][YouTube][Slides]

Gender, language, and society – word embeddings as a reflection of social inequalities in linguistic corpora. Annual meeting of the Slovenian Sociological Association: Science and future societies. 2019. With Anka Supej, Marko Plahuta, Matthew Purver, and Senja Pollak. [pdf]

Reducing Controversy by Connecting Opposing Views. Invited to IJCAI 2018. With K. Garimella, G. De Francisci Morales, A. Gionis. [IJCAI]

Political Discourse on Social Media: Echo Chambers, Gatekeepers, and the Price of Bipartisanship. The Web Conference 2018. With K. Garimella, G. De Francisci Morales, A. Gionis. [ACM][arXiv]. Covered on: [CNET], [Le Monde].

Markov Chain Monitoring. SIAM Symposium on Data Mining (SDM). 2018. With Harshal Chauduri, Evimaria Terzi. [arXiv – full version]

Poster: Using STAN to Explore Fairness in University Admission Policies. STAN Conference 2018. With Carlos Castillo.

Tutorial: Polarization on Social Media. KDD2018, WWW 2018 and AAAI ICWSM 2017. With K. Garimella, G. De Francisci Morales, A. Gionis. 2017 – 2018. [slides]

Quantifying Controversy on Social Media. Springer Transactions on Social Computing 2017. With K. Garimella, G. De Francisci Morales, A. Gionis

The Effect of Collective Attention on Controversial Debates on Social Media. WebSci 2017. With K. Garimella, G. De Francisci Morales, A. Gionis. [Slides]
Best Student Paper. 

Reducing Controversy by Connecting Opposing Views. ACM WSDM 2017. With K. Garimella, G. De Francisci Morales, A. Gionis. [ACM][Slides] Covered on [Acolyer], [Communications of ACM – News], [Slate].
Best Student Paper.

Modeling Urban Behavior by Mining Urban Data. IEEE Transactions on Big Data / Special Issue on Urban Computing. With E. Çelikten, G. Le Falher. [IEEEXplore]

“What Is the City but the People?” Exploring Urban Activity Using Social Web Traces. Demo at WWW2016. With E. Çelikten, G. Le Falher.  [ACM] [pdf]

Local Discrepancy Maximization on Graphs. IEEE TKDE 2017. With A. Gionis, A. Ukkonen. [IEEEXplore]

Absorbing random-walk centrality: Theory and algorithms. IEEE ICDM 2015. With A. Gionis, H. Mavroforakis. [Arxiv] [Slides] [Blog Post]

Sparsification of influence networks. Appeared at ACM KDD 2011. With Francesco Bonchi, Carlos Castillo, Aristides Gionis, and Antti Ukkonen. [ACM][Code]

Other Publications are available through Google Scholar and DBLP.



2021: Reviewer for DAMI.
2020: Reviewer for CHI, DAMI, ICDE, KDD, TKDE.
2019: Reviewer for DAMI, ICDE, KDD, PVLDB, TKDE.


Data Science Project, University of Helsinki, Spring 2021, Fall 2018.
CS Colloquium, University of Helsinki, 2021, 2020.
Network Analysis, University of Helsinki, Spring 2021, 2020, 2019.
News and Politics on the Web, Seminar, University of Helsinki, Fall 2018.
Introduction to Big Data Management: Semi-structured data and MongoDB, University of Helsinki, Fall 2018, with Jiaheng Lu.

Data Science, INSA Lyon, Fall 2017.
Modern Database Systems, Aalto, Spring 2017, with Aristides Gionis.
Modern Database Systems, Aalto, Spring 2016, with Aristides Gionis.
The course covers (i) relational database systems and disk access analysis, (ii) querying and indexing for semi-structured data and text, (iii) Map-Reduce and Apache Spark.
Mining the Social Web, Aalto, Spring 2015, with Aristides Gionis.