Vagelis Hristidis (official name: Evangelos Christidis), Professor

Computer Science & Engineering
University of California, Riverside
900 University Ave.
Riverside, CA 92521
office: Winston Chung Hall 317
office tel.: (951) 827-2478
fax: (951) 827-4643


My key areas of expertise are Databases Systems and Information Retrieval. I work on optimizing the performance of NoSQL database systems. I am also interested to make the information in databases easily accessible and useful, in various application domains. My research has strong emphasis on interdisciplinary topics, mainly healthcare and social networks. My key achievements include the NSF CAREER award, a Google Research Award, an IBM Scalable Data Analytics for A Smarter Planet Innovation Award, the FIU SCIS Excellence in Research Award (twice), the FIU University Faculty Award and the Kauffmann Entrepreneurship Award. My work has been funded by NSF, IARPA, DHS, DTRA, Samsung, Google and IBM. Our work on correlating Twitter and financial data in 2012 was featured by many mainstream media like The New York Times, Forbes and Yahoo!. In 2016, I co-founded SmartBot360, which is a cloud-based chatbot platform, funded by two NSF SBIR grants.

Curriculum Vitae    Google Scholar Profile    ORCID


UCR Database Lab


  1. Shihab Rashid, PhD student
  2. Merlin Mao, PhD student
  3. Jannat Meem, PhD student


  1. Abu Bakar Siddique, PhD 2021, Assistant Professor at University of Kentucky
  2. Ryan Rivas, PhD 2021, SmartBot360
  3. Le Xuan Thong Nhat, PhD 2019, at Facebook
  4. Mohiuddin Abdul Qader, PhD 2018, at eBay
  5. Shouq Sadah, PhD 2017, PostDoc at UCLA
  6. Moloud Shahbazi, PhD 2017, at Apple
  7. Matthew Wiley, PhD 2016
  8. Shiwen Cheng, PhD 2015, at Facebook
  9. Eduardo Ruiz, PhD 2013, at Amazon, then at Google
  10. Abhijith Kashyap, PhD 2013
  11. Fernando Farfan, PhD 2010, PostDoc at University of Michigan, Ann Arbor
  12. Ramakrishna Varadarajan, PhD 2009, at HP (formerly: PostDoc at University of Wisconsin, Madison)


Past Projects


List of Publications

Publications from DBLP



  1. Analysis of Online Health-Related User-Generated Content, Keynote talk at the KDD bigdas 2017 Workshop, Halifax, 2017
  2. Collaborative Tagging for Web Item Design and Health Data Management Research, Microsoft Research, Redmond, 2012
  3. PatentsSearcher: A Novel Portal to Search and Explore Patents. 3rd International Workshop on Patent Information Retrieval, at ACM CIKM 2010, Toronto
  4. An Access Cost-Aware Approach for Object Retrieval over Multiple Sources, VLDB 2010, Singapore
  5. Information Discovery on Vertical Domains, Invited talk, University of Waterloo, Canada, June 2010. Variants of this talk also given at Free University of Bolzano, Roma University Tre, University of Athens, Yahoo! Research Barcelona, and other places.
  6. Searching and Exploring Biomedical Data, Invited talk, Indiana University Medical School, June 2010   
  7. CADS: A Collaborative Adaptive Data Sharing Platform. VLDB Workshop on Personalized Access, Profile Management, and Context Awareness in Databases (PersDB 2009), Lyon, France, August 2009   
  8. Experiences on Processing Spatial Data with MapReduce. 21st International Conference on Scientific and Statistical Database Management (SSDBM), New Orleans, 2009