Work

SELECTED PUBLICATIONS

Machine Learning

Under review: A Bayesian approach to evaluating machine learning algorithms on selectively labeled data. With Riku Laine, Antti Hyttinen. 2020.

Under review: Joint Use of Node Features and Proximity for Semi-Supervised Classification on Graphs. With Arpit Merchant. 2020.

Under review: Query the model: precomputations for efficient inference with Bayesian Networks. With Cigdem Aslay, Aristides Gionis. 2019. [arXiv]

Algorithmic Fairness

Under review: Affirmative Action Policies for Intersectional Classes.
With Carlos Castillo, Giorgio Barnabo, Sergio Celis. 2020.

Under review: Designing Affirmative Action Policies under Uncertainty.
With Corina Hertweck, Carlos Castillo. 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. Slovene sociological meeting 2019. With Anka Supej, Marko Plahuta, Matthew Purver, and Senja Pollak.

Computational Social Science

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

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. WWW 2018. With K. Garimella, G. De Francisci Morales, A. Gionis. [ACM][arXiv]
Covered on CNETLe Monde.

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

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

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]

Network Analysis

Markov Chain Monitoring.  SIAM SDM 2018. With Harshal Chauduri, Evimaria Terzi. [arXiv – full version]

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

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.


PROFESSIONAL SERVICE

Reviewing

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


PhD committee member for
Marjoriikka J Ylisiurua, University of Helsinki, 2019-today.

TEACHING

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