My primary research interests are in social computing, information retrieval, data science, and cybersecurity over large-scale networked information systems like the Web, social media, crowdfunding, and crowd-based systems. My research focus has both positive and negative dimensions. On one hand, I focus on threats to these systems and design methods to mitigate negative behaviors; on the other, I look for positive opportunities to mine and analyze these systems for developing next generation algorithms and architectures that can empower decision makers.

Teaching (full list)

Selected Recent Publications (full list)

Recent Professional Activities (full list)

  • Program committee member: ICWSM 2019, WWW 2019, AAAI 2019, ASONAM 2018, KDD 2018, HT 2018, ICWSM 2018, ICC 2018 CISS, ECIR 2018, WWW 2018, KDD 2017, ASONAM 2017, ICWSM 2017, WWW 2017, PAKDD 2017, ECIR 2017, SAC 2017
  • Tutorial: Social Media Threats and Countermeasures at ICWSM 2014, Social Spam, Campaigns, Misinformation and Crowdturfing at WWW 2014
  • Conference Organization: JCDL 2015 (Poster and Demo Chair)
  • 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