Experience
Education
Bio
Academic Employment Information School, University of Sheffield, UK. Senior Lecturer (Associate Professor) in Data Science. Nov 2015 – now Information School, University of Sheffield, UK. Lecturer (Assistant Professor) in Data Science. Aug 2014 – Oct 2015. eXascale Infolab, University of Fribourg, Switzerland. Post-doctoral researcher. May 2011 – July 2014. L3S Research Center, University of Hannover, Germany. Junior Researcher. Mar 2006 – Apr 2011. Internships and Visits AMPLab, UC Berkeley, CA, USA. Summer 2012. With Michael J. Franklin, Tim Kraska, Beth Trushkowsky on crowdsourced query understanding. Yahoo! Research, Barcelona, Spain. Summer 2009. With Hugo Zaragoza and Roi Blanco on Time-aware Entity Ranking in news articles. Academic Education Leibniz University of Hannover, Germany. Ph.D. in Computer Science (Dr. rer. nat.) Supervisors: Wolfgang Nejdl, Arjen P. de Vries. Title: “From People to Entities: Typed Search in the Enterprise and the Web”. Apr 2006 - Apr 2011. Summer Schools: “Multimedia Semantics” (2006), “Advanced Retrieval and Web Mining” (2007) University of Udine, Italy. M.Sc. (cum laude) in Computer Science Supervisor: Stefano Mizzaro. Dec 2003 - Dec 2005. Summer School participation: “Information Retrieval” (2005). University of Udine, Italy. B.Sc. in Computer Science Supervisor: Alberto Policriti. Oct 2000 - Dec 2003. Research Interests Crowdsourcing for Human Computation, Information Retrieval, Semantic Web. Honors and Awards • Invited at the Facebook Faculty London Summit, 2015. • Outstanding Early Career Research Achievement Award by the University of Sheffield Faculty of Social Sciences, 2015. • Selected for the “Future Academic Leaders Programme” at the University of Sheffield, 2015. • Nominated for a University of Sheffield Faculty Learning and Teaching Award, 2015. • Nominated for Best Research Paper at the ISWC 2013 conference. Top 2%. • Third place at the “Semantic Web Challenge 2013” with “B-hist: Entity-Centric Search over Personal Web Browsing History”. Top 18%. • Selected for the 1st Heidelberg Laureate Forum, 2013. • “Crowdsourcing for Multimedia Ideas Competition" award at CrowdMM 2013. • Best Demo Award at the ISWC 2011 conference. Top 1%. • 2nd most Outrageous Idea Award at the ISWC 2011 conference. Top 8%. • PhD dissertation award – “Diploma Thesis Award 2011”, Semiramis Research and Service Unit. • 3rd Best Paper Award at the LA-WEB 2009 conference. • Selected for the IBM EMEA Best Student Recognition Event 2006. • World Finalist (representing Italy) at Microsoft Imagine Cup 2005 Software Eng competition. • Finalist at the Italian Microsoft Imagine Cup 2004, 2005, 2006, 2007. Research Themes • Entity-Centric Information Access: Improving search engines and Web browsing using entities. • Hybrid Human-Machine Data Analysis: Improving machine-based data analysis systems leveraging human computation at scale. • Next Generation Crowdsourcing Platforms: More efficient and effective crowdsourcing platforms. • Social Computing: Using user-generated content and activities to improve Web user experience. Selected Publications Crowdsourcing: Hybrid Human-Machine Systems for Data Analysis Djellel Eddine Difallah, Michele Catasta, Gianluca Demartini, Panagiotis G. Ipeirotis, and Philippe Cudré-Mauroux. The Dynamics of Micro-Task Crowdsourcing -- The Case of Amazon MTurk. In: 24th International Conference on World Wide Web (WWW 2015), Research Track. Firenze, Italy, May 2015. (Acceptance rate: 14.1%) Ujwal Gadiraju, Ricardo Kawase, Stefan Dietze, and Gianluca Demartini. Understanding Malicious Behaviour in Crowdsourcing Platforms: The Case of Online Surveys. In: Proceedings of the ACM Special Interest Group on Computer Human Interaction (CHI 2015). Seoul, South Korea, April 2015. (Acceptance rate: 23%). Djellel Eddine Difallah, Gianluca Demartini, and Philippe Cudré-Mauroux. Pick-A-Crowd: Tell Me What You Like, and I'll Tell You What to Do. In: 22nd International Conference on World Wide Web (WWW 2013), Rio de Janeiro, Brazil, May 2013. (Acceptance rate: 15%). Gianluca Demartini, Djellel Eddine Difallah, and Philippe Cudré-Mauroux. Large-Scale Linked Data Integration Using Probabilistic Reasoning and Crowdsourcing. In: VLDB Journal, Special issue on Structured, Social and Crowd-sourced Data on the Web. August 2013. (Journal impact factor at publication time: 1.395)