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Fragkiskos D. Malliaros

Postdoctoral Fellow @ UC San Diego
Department of Computer Science and Engineering


About me

Since October 2016, I am a data science postdoctoral fellow in the Department of Computer Science and Engineering at UC San Diego and member of the Artificial Intelligence group. I am also affiliated with the Information Theory and Applications Center (ITA) and the Qualcomm Institute. Right before that (Oct. 2015 - Sept. 2016), I was a postdoctoral researcher in the Data Science and Mining (DaSciM) group of the Computer Science Laboratory (LIX) at École Polytechnique in Paris, France, from where I also received my Ph.D. degree (Sept. 2015), working under the supervision of Prof. Michalis Vazirgiannis. I obtained both my Diploma and my M.Sc. degree from the Computer Engineering and Informatics Department of the University of Patras, Greece in 2009 and 2011 respectively. There, I was fortunate to work with Prof. Vasileios Megalooikonomou.

During the summer of 2014, I was a research intern at the Palo Alto Research Center (PARC) in Palo Alto, CA. I was also the recipient of the 2012 Google Europe Doctoral Fellowship in Graph Mining and the 2015 Thesis Prize by Ecole Polytechnique.

My research interests span the broad area of data science, with focus on graph mining, social network analysis, applied machine learning and natural language processing.

News

Teaching

Publications

2017

  • Graph-based Text Representations: Boosting Text Mining, NLP and Information Retrieval with Graphs (Tutorial)
    Fragkiskos D. Malliaros and Michalis Vazirgiannis.
    Conference on Empirical Methods in Natural Language Processing (EMNLP), Copenhagen, Denmark, September 2017. (To Appear).
    [Tutorial Website: LINK]
  • Sensitivity of Community Structure to Network Uncertainty
    Marc Mitri, Fragkiskos D. Malliaros, and Michalis Vazirgiannis.
    SIAM International Conference on Data Mining (SDM), Houston, Texas, April 2017.
    [Paper: PDF, Slides: PDF, Project Website: LINK]
    Received the SIAM/NSF Early Career Travel Award.

2016

  • SpreadViz: Analytics and Visualization of Spreading Processes in Social Networks
    Konstantinos Skianis, Maria Evgenia G. Rossi, Fragkiskos D. Malliaros, and Michalis Vazirgiannis.
    IEEE International Conference on Data Mining (ICDM), Barcelona, Spain, December 2016.
    (Demo paper)
  • Core Decomposition of Networks: Concepts, Algorithms and Applications (Tutorial)
    Fragkiskos D. Malliaros, Apostolos N. Papadopoulos and Michalis Vazirgiannis.
    IEEE International Conference on Data Mining (ICDM), Barcelona, Spain, December 2016.
    (Acceptance Rate: 4/17)
    [Tutorial Website: LINK]
  • A Graph Degeneracy-based Approach to Keyword Extraction
    Antoine J.-P. Tixier, Fragkiskos D. Malliaros, and Michalis Vazirgiannis.
    Conference on Empirical Methods in Natural Language Processing (EMNLP), Austin, Texas, November 2016.
    [Paper: PDF]
  • A k-core Decomposition Framework for Graph Clustering
    Christos Giatsidis, Fragkiskos D. Malliaros, Nikolaos Tziortziotis, Charanpal Dhanjal, Emmanouil Kiagias, Dimitrios M. Thilikos, and Michalis Vazirgiannis.
    Preprint, 2016.
    [arXiv: PDF]
  • Locating Influential Nodes in Complex Networks
    Fragkiskos D. Malliaros, Maria-Evgenia G. Rossi and Michalis Vazirgiannis.
    Scientific Reports, Nature Publishing Group, 2016.
    (Impact Factor: 5.228)
    [Journal Version: LINK]
  • Core Decomposition in Graphs: Concepts, Algorithms and Applications (Tutorial)
    Fragkiskos D. Malliaros, Apostolos N. Papadopoulos and Michalis Vazirgiannis.
    International Conference on Extending Database Technology (EDBT), Bordeaux, France, March 2016.
    [Paper: PDF, Slides: PDF]

2015

  • Vulnerability Assessment in Social Networks under Cascade-based Node Departures
    Fragkiskos D. Malliaros and Michalis Vazirgiannis.
    EPL (Europhysics Letters), 110(6): 68006, IOP Science, 2015.
    (Impact Factor: 1.963)
    [Journal Version: LINK]
  • Graph-Based Term Weighting for Text Categorization
    Fragkiskos D. Malliaros and Konstantinos Skianis.
    Social Media and Risk Workshop (SoMeRis), IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM), Paris, France, August 2015.
    [Paper: PDF, Slides: PDF]
  • Core Decomposition: Algorithms and Applications (Tutorial)
    Fragkiskos D. Malliaros, Michalis Vazirgiannis and Apostolos N. Papadopoulos.
    IEEE/ACM Intern. Conf. on Advances in Social Networks Analysis and Mining (ASONAM), Paris, France, August 2015.
    [Tutorial Website: LINK]
  • Disengagement Social Contagion: Assessing Network Vulnerability under Node Departures
    Fragkiskos D. Malliaros and Michalis Vazirgiannis.
    International Conference on Computational Social Science (ICCSS), Helsinki, Finland, June 2015.
    [Paper: PDF]
  • Spread it Good, Spread it Fast: Identification of Influential Nodes in Social Networks
    Maria-Evgenia G. Rossi, Fragkiskos D. Malliaros, and Michalis Vazirgiannis.
    International World Wide Web Conference (WWW), Florence, Italy, May 2015.
    [Paper: PDF, Poster: PDF ]

2014

  • Estimating Robustness in Large Social Graphs
    Fragkiskos D. Malliaros, Vasileios Megalooikonomou, and Christos Faloutsos.
    Knowledge and Information Systems (KAIS), Springer, 2014.
    (Impact Factor: 1.702)
    [Paper: PDF, Journal Version: LINK]
  • CoreCluster: A Degeneracy Based Graph Clustering Framework
    Christos Giatsidis, Fragkiskos D. Malliaros, Dimitrios M. Thilikos and Michalis Vazirgiannis.
    AAAI Conference on Artificial Intelligence (AAAI), Quebec City, Canada, July 2014.
    (Acceptance Rate: 28%)
    [Paper: PDF, Poster: PDF]

2013

  • To Stay or Not to Stay: Modeling Engagement Dynamics in Social Graphs
    Fragkiskos D. Malliaros and Michalis Vazirgiannis.
    ACM International Conference on Information and Knowledge Management (CIKM), San Francisco, October 2013.
    (Full Paper, Acceptance Rate: 16.9%)
    [Paper: PDF, Slides: PDF]
  • Clustering and Community Detection in Directed Networks: A Survey
    Fragkiskos D. Malliaros and Michalis Vazirgiannis.
    Physics Reports, 533(4): 95-142, Elsevier, 2013.
    (Impact Factor: 22.929)
    [Journal Version: LINK, arXiv Preprint: PDF]
  • Multiresolution Similarity Search in Time Series Data: An Application to EEG Signals
    Amalia Charisi, Fragkiskos D. Malliaros, Evangelia Zacharaki, and Vasileios Megalooikonomou.
    ACM International Conf. on Pervasive Technologies Related to Assistive Environments (PETRA), Rhodes, Greece, May 2013.
    [Paper: PDF]
  • Graph Mining Tools for Community Detection and Evaluation in Social Networks and the Web (Tutorial)
    Christos Giatsidis, Fragkiskos D. Malliaros, and Michalis Vazirgiannis.
    International World Wide Web Conference (WWW), Rio de Janeiro, Brazil, May 2013.
    [Tutorial Slides: PDF]
  • Advanced Graph Mining for Community Evaluation in Social Networks and the Web (Tutorial)
    Christos Giatsidis, Fragkiskos D. Malliaros, and Michalis Vazirgiannis.
    ACM International Conference on Web Search and Data Mining (WSDM), Rome, Italy, February 2013.
    [Paper: PDF, Tutorial Website: LINK]

2011 - 2012

  • Fast Robustness Estimation in Large Social Graphs: Communities and Anomaly Detection
    Fragkiskos D. Malliaros, Vasileios Megalooikonomou, and Christos Faloutsos.
    SIAM International Conference on Data Mining (SDM), Anaheim, California, April 2012.
    (Acceptance Rate: 27%)
    [Paper: PDF, Poster: PDF]
  • Expansion Properties of Large Social Graphs
    Fragkiskos D. Malliaros and Vasileios Megalooikonomou.
    DASFAA International Workshop on Social Networks and Social Media Mining on the Web (SNSMW), Hong Kong, April 2011.
    [Paper: PDF, Slides: PDF]

Collaborators

I have been very privileged to collaborate with the following great people, listed in chronological order of collaboration.

Vasileios Megalooikonomou (U of Patras), Christos Faloutsos (CMU), Michalis Vazirgiannis (École Polytechnique), Christos Giatsidis (École Polytechnique), Amalia Charisi (U of Patras), Evangelia I. Zacharaki (U of Patras), Dimitrios M. Thilikos (U of Montpellie, CNRS and U of Athens), Maria-Evgenia Rossi (École Polytechnique), Konstantinos Skianis (École Polytechnique), Jordi Casas-Roma (U Oberta de Catalunya and U Autònoma de Barcelona), Apostolos N. Papadopoulos (Aristotle U of Thessaloniki), Charanpal Dhanjal (Télécom ParisTech and Forebyte Ltd. London), Nikolaos Tziortziotis (École Polytechnique), Emmanouil Kiagias (Oracle, UK), Antoine J.-P. Tixier (École Polytechnique)


Misc

Contact

Address
Atkinson Hall, Room 4111
University of California, San Diego
9500 Gilman Drive #0436
La Jolla, CA 92093-0436