Chair / Senior Program Committee
- Sponsors Chair, AAAI International Conference on Weblogs & Social Media 2013 (ICWSM)
- Area Co-chair, "Social Media & Presence": at ACM Multimedia 2013 (MM)
- International AAAI Conference on Weblogs & Social Media 2013 (ICWSM)
- Track Co-chair, "Social Media": at the ACM Hypertext and Social Media 2012 (HT)
Program Committee Member
- ACM Conference on Web Search and Data Mining (WSDM): 2012, 2014
- International Joint Conference on Artificial Intelligence (IJCAI): 2013
- International World Wide Web Conference (WWW): 2012
- Conference on Empirical Methods in Natural Language Processing (EMNLP-CoNLL): 2012
- International AAAI Conference on Weblogs & Social Media (ICWSM): 2011-12
- IEEE International Conference on Social Computing (SocialCom): 2010-12
- ACM Conference on Hypertext (HT), "Social Linking" track: 2011-13
- Intl Conf on Advances in Social Network Analysis and Mining (ASONAM): 2011-13
- ACM SIGIR Workshop on Health Search and Discovery (HSD): 2013
- Workshop on Language in Social Media, 2011-13
- Intl Workshop on Real-Time Analysis & Mining of Social Streams, 2012-13
- Workshop on Privacy and Security in Online Social Media, 2012-13
- Workshop on Social Media, in conjunction with ACM Multimedia 2011
- ACM Multimedia Systems Conference, ``Datasets" track 2013 (MMSys)
- International Workshop on Modeling Social Media 2012-13 (MSM)
- First Workshop on Social News On the Web, co-located with WWW 2013 (SNOW)
Workshops Organized
First Workshop on Social Computing for Workforce 2.0: 2013
Journal Referee
Information Systems Research; PLoS one; ACM Trans. on the Web (TWeb); ACM Trans. on on Computer-Human Interaction (TOCHI); ACM Trans. on Information Systems (TOIS); ACM Trans. on Knowledge Discovery from Data (TKDD); ACM Trans. on Multimedia Computing, Communications and Applications (TOMCCAP); ACM Trans. on Intelligent Systems and Technology (TIST); Journal of Computational Science; IEEE Transactions on Multimedia; Decision Support Systems; Machine Learning Journal; Journal of Complexity.
External Reviewer
GROUP 2012; CSCW 2011, 2012, 2013; CHI 2011, 2012, 2013; JCDL 2010; WWW 2010; ACM workshop on Social Network Mining and Analysis 2009, International Conference on Multimedia & Expo 2009, ACM Multimedia 2009.