Ujwal Gadiraju

Ujwal Gadiraju

Ph.D. Candidate @ L3S Research Center

Current Affiliation: L3S Research Center.
Leibniz Universität Hannover, Germany
Address: L3S Research Center, Appelstraße 4a, Hannover.
Phone: +49 0511 762 5772
Fax: +49 0511 762 19712
Email: gadiraju (at) L3S (dot) de

[Google Scholar] [DBLP]

Research Interests



My research primarily focuses on leveraging human intelligence to solve problems that go beyond the capability of machines. You can find my publications here. I am broadly interested in:

  • Crowdsourcing

  • Human Computation

  • Information Retrieval

  • Web Mining

  • Social Computing


  • news

    Full Research Paper Accepted at HT 2017, Prague, Czech Republic

    Clarity is a Worthwhile Quality - On the Role of Task Clarity in Microtask Crowdsourcing


    Full Research Paper Accepted at ICWE 2017, Rome, Italy

    Improving Reliability of Crowdsourced Results by detecting Crowd Workers with Multiple Identities


    Full Research Paper Accepted at LAK 2017, Vancouver, Canada

    Improving Learning Through Achievement Priming in Information Finding Microtasks


    Short Research Paper Accepted at ECIR 2017, Aberdeen, Scotland

    JustEvents: A Crowdsourced Corpus for Event Validation with Strict Temporal Constraints



    Brief CV



    2013-Present Ph.D Candidate
    L3S Research Center, Leibniz Universität Hannover, Germany.
    2011-2012 Master of Science in Computer Science
    Delft University of Technology (TU Delft), Delft, The Netherlands.
    2006-2010 Bachelor of Technology in Computer Science and Engineering
    Vellore Institute of Technology University, Vellore, Tamil Nadu, India.


    Selected Works



    CHI 2015 chi2015 Understanding Malicious Behavior in Crowdsourcing Platforms: The Case of Online Surveys


    WebSci 2015 websci2015 Ranking Buildings and Mining the Web for Popular Architectural Patterns


    HT 2014 ht2014 A Taxonomy of Microtasks on the Web




    Tutorials and Lectures



    May 22nd, 2016 WebSci'16 - It's Getting Crowded! How to Use Crowdsourcing Effectively for Web Science Research
    Hannover, Germany.
    Tutorial Slides
    May 17th, 2016 ICWSM'16 - How to Use Crowdsourcing Effectively for Social Media Research
    Cologne, Germany.
    Tutorial Slides
    April 26th, 2016 Web Science Sommersemester'16
    L3S Research Center, Leibniz Universität Hannover, Germany.
    Slide Deck

    News & Press Reports



    March 7th, 2017 WWW 2017 Outstanding Reviewer Award
    L3S News
    October 13th, 2016 Crowdsource Solutions to Big Problems
    Interview with Gail Carmichael, Shopify
    October 17th, 2016 Studying Abroad
    Interview with Daniel Gross