I lead Infolab at WPI. My primary research interests are in information retrieval, natural language processing, social computing, machine learning, and cybersecurity over large-scale networked information systems like the Web and social media. I focus on threats to these systems and design methods to mitigate negative behaviors (e.g., misinformation, hate speech), and look for positive opportunities to mine and analyze these systems for developing next generation algorithms and architectures (e.g., recommender system, natural language understanding). I also focus on AI for social good (e.g., disrupting wildlife trafficking networks).

Teaching (full list)

  • CS 539 Machine Learning, Fall 2022

Selected Recent Publications (full list)

Recent Professional Activities (full list)

  • Program committee member: SIGIR 2023, WSDM 2023, KDD 2022, SIGIR 2022, TheWebConf 2022, DeMaL 2021, SIGIR 2021, AAAI 2021, TheWebConf 2021, WSDM 2021, KDD 2020, SIGIR 2020, AAAI 2020, TheWebConf 2020
  • Senior program committee member: ICWSM 2023, AAAI 2023, ICWSM 2022, ICWSM 2021, ICWSM 2020
  • Conference Organization: WSDM 2020 (Cup Chair), JCDL 2015 (Poster and Demo Chair)
  • Tutorial: Social Media Threats and Countermeasures at ICWSM 2014, Social Spam, Campaigns, Misinformation and Crowdturfing at WWW 2014
  • Journal Reviewer: ACM TIST, ACM TKDD, ACM TOIS, ACM TWEB, ACM TOIT, ACM TISSEC, ACM TIIS, ACM Computing Surveys, IEEE TKDE, IEEE TPDS, IEEE Pervasive Computing, IEEE Internet Computing, IEEE Transactions on Cybernetics, IEEE/ACM TON, Springer SNAM, Springer Data Mining and Knowledge Discovery, Springer GeoInformatica, International Journal of Cooperative Information Systems

Honors and Awards