Professional Activities
Other
- ACM International Conference on Management of Data (SIGMOD 2004): Proceedings Chair
- First M3SN Workshop on Modeling, Managing, and Mining of Evolving Social Networks (co-located with ICDE 2009): Co-Chair
- 1st USETIM (Using Search Engine Technology for Information Management) Workshop: Keynote Speaker
- 2010 Dagstuhl Workshop on Robust Query Processing: Co-Organizer
- 37rd International Conference on Very Large Databases (VLDB 2011): Local Arrangements Chair
Programm Comittee Memberships:
- 10th Conference on Database Systems for Business, Technology, and the Web (BTW 2003): Program Committee member
- 21st International Conference on Data Engineering (ICDE 2005): Program Committee member
- 11th International Conference on Database Systems for Advanced Applications (DASFAA 2006): Program Committee member
- 12th International Conference of the Management of Data (COMAD 2005): Industrial Program Committee member
- 12th International Conference on Database Systems for Advanced Applications (DASFAA 2007): Program Committee member
- 14th Conference on Database Systems for Business, Technology, and the Web (BTW 2007): Industrial Program Committee member
- 18th International Conference on Database and Expert Systems Applications (DEXA 2007): Program Committee member
- 33rd International Conference on Very Large Databases (VLDB 2007): Program Committee member
- International Workshop on Ranking in Databases (DBRank 2007) to be held in conjunction with ICDE 2007: Program Committee member
- 13th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD 2007): Industrial Program Committee member
- 13th International Conference on Database Systems for Advanced Applications (DASFAA 2008): Program Committee member
- 11th International Conference on Extending Database Technology (EDBT 2008): Program Committee member
- 19th International Conference on Database and Expert Systems Applications (DEXA 2008): Program Committee member
- Second International Conference on Weblogs and Social Media (ICWSM 2008): Poster/Demo Committee member
- 15th International Conference of the Management of Data (COMAD 2008): Program Committee member
- 16th Conference on Database Systems for Business, Technology, and the Web (BTW 2009): Industrial Program Committee member
- Third International Conference on Weblogs and Social Media (ICWSM 2009): Program Committee member
- NAACL Human Language Technology (NAACL-HLT) Conference 2009: Program Committee Member
- 2nd M3SN Workshop on Modeling, Managing, and Mining of Evolving Social Networks (co-located with ICDE 2010): Program Committee member
- 4th International Workshop on Ranking in Databases (DBRank 2010): Program Committee member
- 4th International Conference on Weblogs and Social Media (ICWSM 2010): Program Committee member
- NAACL Human Language Technology (NAACL-HLT) Conference 2010: Program Committee Member
- Fourth Workshop on Enabling Real-Time Business Intelligence (BIRTE 2010): Program Committee Member
- 1st Workshop on Data Management Issues in Web Syndication Systems (DaMIWS 2010): Program Committee Member
- 5th International Conference on Weblogs and Social Media (ICWSM 2011): Program Committee Member
- 1st International Temporal Web Analytics Workshop (TWAW 2011) at WWW 2011: Program Committee Member
- 5th IEEE International Conference on Semantic Computing (ICSC 2011): Program Committee Member
- 17th ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2011): Program Committee Member
- European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD 2011): Program Committee Member
- Fifth Workshop on Enabling Real-Time Business Intelligence (BIRTE 2011): Program Committee Member
- SIGIR Workshop on Entity-Oriented Search: Program Committee Member
- 28th International Conference on Data Engineering (ICDE 2012) – Demo Track: Program Committee Member
- 21st World Wide Web Conference (WWW 2012): Program Committee Member
- 5th International ACM Conference on Web Search and Data Mining (WSDM 2012): Program Committee Member
- 26th International Conference on Artificial Intelligence (AAAI 2012): Program Committee Member
- 2nd International Temporal Web Analytics Workshop (TempWeb 2012) at WWW 2012: Program Committee Member
- 39rd International Conference on Very Large Databases (VLDB 2013/PVLDB): Program Committee Member
- 6th Workshop on Enabling Real-Time Business Intelligence (BIRTE 2012): Program Committee Member
- Conference on Empirical Methods on Natural Language Processing (EMNLP 2012): Program Committee Member
- 6th ACM International Conference on Web Search and Data Mining (WSDM 2013): Program Committee Member
- 2nd International Workshop on Searching and Integrating New Web Data Sources (VLDS 2012): Program Committee Member
- 16th International Conference on Extending Database Technology (EDBT 2013): Industrial Program Committee Member
- 1st Joint International Workshop on Entity-oriented and Semantic Search 2012 (JIWES 2012): Program Committee Member
- 29th International Conference on Data Engineering (ICDE 2013) – Demo Track: Program Committee Member
- 19th ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2013): Program Committee Member
- 2013 IEEE International Conference on Big Data (IEEE Big Data 2013)
- 40rd International Conference on Very Large Databases (VLDB 2014/PVLDB): Program Committee Member
- 30th International Conference on Data Engineering (ICDE 2014): Program Committee Member
- 17th International Conference on Extending Database Technology (EDBT 2014): Demo Program Committee Member
- 31st International Conference on Machine Learning (ICML 2014): Program Committee Member
- 23rd World Wide Web Conference (WWW 2014): Program Committee Member
- 20th ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2014): Program Committee Member (Research track)
- 20th ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2014): Program Committee Member (Industry and Government track)
- 8th International Conference on Weblogs and Social Media (ICWSM-14): Program Committee Member
- The Neural Information Processing Systems Conference 2014 (NIPS-2014): Program Committee Member
- 8th ACM International Conference on Web Search and Data Mining (WSDM 2015): Program Committee Member
- 24th World Wide Web Conference (WWW 2015): Program Committee Member
- 21st ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2015): Program Committee Member (Research track)
- 21st ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2015): Program Committee Member (Industrial and Government track)
- 41rd International Conference on Very Large Databases (VLDB 2015/PVLDB): Demo Track Program Committee Member
- 9th ACM International Conference on Web Search and Data Mining (WSDM 2016): Program Committee Member
- The Neural Information Processing Systems Conference 2015 (NIPS-2015): Program Committee Member
- 32nd International Conference on Data Engineering (ICDE 2016): Demo Track Program Committee Member
- 25th International World Wide Web Conference (WWW 2016): Program Committee Member
- 22nd ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2016): Program Committee Member (Research track)
- 25th International Joint Conference on Artificial Intelligence (IJCAI-16) : Program Committee Member
- 42nd International Conference on Very Large Databases (VLDB 2016/PVLDB): Demo Track Program Committee Member
- 43rd International Conference on Very Large Databases (VLDB 2017/PVLDB): Program Committee Member
- 10th ACM International Conference on Web Search and Data Mining (WSDM 2017) : Program Committee Member
- 11th ACM International Conference on Web Search and Data Mining (WSDM 2018) : Program Committee Member
- 27th International World Wide Web Conference (WWW 2018): Program Committee Member
- 24nd ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2018): Program Committee Member (Research track)
- 5th IEEE International Conference on Data Science and Advanced Analytics (DSAA 2018) : Program Committee Member
- 12th ACM International Conference on Web Search and Data Mining (WSDM 2019) : Program Committee Member
- 6th IEEE International Conference on Data Science and Advanced Analytics (DSAA 2019) : Program Committee Member
- 13th ACM International Conference on Web Search and Data Mining (WSDM 2020) : Program Committee Member
- The Web Conference 2020 (previously known as WWW) : Program Committee Member
- The 43rd International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2020) : Program Committee Member
- 14th ACM International Conference on Web Search and Data Mining (WSDM 2021) : Program Committee Member
- The 44th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2021) : Program Committee Member
- 27nd ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2021): Program Committee Member (Applied Science Track)
- 15th ACM International Conference on Web Search and Data Mining (WSDM 2022) : Program Committee Member
- 28nd ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2022): Program Committee Member (Applied Science Track)
- The 45th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2022) : Program Committee Member
- 16th ACM International Conference on Web Search and Data Mining (WSDM 2023) : Program Committee Member
- The Web Conference 2023 (previously known as WWW) : Program Committee Member
- The 46th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2023) : Program Committee Member
- 29nd ACM Conference on Knowledge Discovery and Data Mining (SIGKDD 2023): Program Committee Member (Applied Science Track)
- The Web Conference 2024 (previously known as WWW) : Program Committee Member
- The 47th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2024) : Program Committee Member
- PVLDB Volume 18 (VLDB 2025) : Program Committee Member
- 18th ACM International Conference on Web Search and Data Mining (WSDM 2025) : Program Committee Member
Journal Reviews: DKE, IJHIS, IS, ISI, TIST, TKDE, TODS, VLDB Journal, WWW Journal
External Reviewer for: STOC, STACS, ICML