I'm an Assistant Professor at the Department of CS of the University of Chile, head of the PRISMA research group and Young Researcher of the CIWS. I was also an associated Researcher at Yahoo! Labs Santiago until 2014.

I'm interested in everything that is Web research: IR, data mining, social media analysis, query log analysis, multimedia and privacy preservation in data mining. 


  • PhD in Computer Science, U. Pompeu Fabra, Barcelona, Spain (Oct. 2009)
  • MSc, CS Engineer and Bachelor in Computer Science, U. of Chile, Santiago, Chile (2005, 2004, 2001)
Conference PC Member
  • WSDM
  • CIKM
  • ECIR
  • GHC

Media Mentions of our Research


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Journal Papers

Book Chapters

Conference & Workshop Papers

  • Gutierrez, F., Poblete, B.: Sentiment-Based User Profiles in Microblogging Platforms. To appear in proceedings of the 26th ACM Conference on Hypertext and Social Media, 1-4 September 2015.
  • Quezada, M. Peña-Araya, V., Poblete, B.: Location-Aware Model for News Events in Social Media. To appear in proceedings of the 38th Annual ACM SIGIR Conference, Santiago, Chile.
  • Guzman, J., Poblete, B.: On-line relevant anomaly detection in the Twitter stream: An Efficient Bursty Keyword Detection Model. In proceedings of KDD 2013 Workshop on Outlier Detection and Description, ODD, Chicago, USA.
  • Bravo-Marquez, F., Mendoza, M., Poblete, B.: Combining Strengths  Emotions and Polarities for Boosting Twitter Sentiment Analysis. In proceedings of KDD 2013 Workshop on Issues of Sentiment Discovery and Opinion Mining, WISDOM-KDD, Chicago, USA.
  • Bravo-Márquez, F.; Gayo-Avello, D.; Mendoza, M.; Poblete, B. Opinion dynamics of elections in Twitter, 8th Latin American Web Congress, LA_WEB, Cartagena de Indias, Colombia, p.32--39, (2012)
  • I. Bordino, D. Donato, B. Poblete: Extracting interesting association rules from toolbar data. In Proceedings of the 21st ACM international conference on Information and knowledge management 2012, Maui, HI, USA.
  • Bracamonte, T., Poblete, B.: Automatic Image Tagging Through Information Propagation in a Query Log Graph Based Structure. In proceedings of ACM Multimedia 2011, Arizona, USA.
  • B. Poblete, R. Garcia, M. Mendoza and A. Jaimes. Do All Birds Tweet the Same? Characterizing Twitter Around the World. In proceedings of CIKM'11. Glasgow,UK.
  • Garcia, R., Poblete, P., Mendoza, M., Jaimes, A.: Microblogging without Borders: Differences and Similarities. In ACM WebSci, 11. Koblenz, Germany.
  • Castillo, C., Mendoza, M., Poblete, B.: "Information Credibility on Twitter". In The World Wide Web Conference (WWW), Hyderabad, India. 2011.
  • Poblete, B., Bustos, B., Mendoza, M., Barrios, J.M.: Visual-Semantic Graphs: Using Queries to Reduce the Semantic Gap in Web Image Retrieval. In CIKM 2010 (Toronto, Canada). ACM Press, New York, NY.
  • Mendoza, M., Poblete, B., Castillo, C.: Twitter Under Crisis: Can we trust what we RT?. In SOMA 2010: KDD Workshop on Social Media Analytics, Washington, DC. July 2010. [bib]
  • Mendoza, M., Marin, M., Ferrarotti, F., Poblete, B: Learning to Distribute Queries onto Web Search Nodes. In proceedings of the 32nd European Conference on Information Retrieval (Milton Keynes, UK). Springer LNCS.
  • Poblete, B., Castillo, C., Gionis, A. 2008. Dr. Searcher and Mr. Browser: A Unified Hyperlink-Click Graph. In Proceedings of the  ACM 17th Conference on Information and Knowledge Management (Napa Valley, California, October 26-30, 2008). CIKM'08. ACM Press, New York, NY.
  • Poblete, B., Baeza-Yates, R. 2008. Query-Sets: Using Implicit Feedback and Query Patterns to Organize Web Documents. In Proceedings of the 17th international Conference on World Wide Web (Beijing, China, April 21 - 25, 2008). WWW '08. ACM Press, New York, NY.
  • Poblete, B., Spiliopoulou, M., Baeza-Yates, R.: Website Privacy Preservation for Query Log Publishing. First International Workshop on Privacy, Security, and Trust in KDD (PINKDD'07), San Jose, CA, USA. August 2007. Best Paper Award [watch the video]
  • Poblete, B., Baeza-Yates, R. 2006. A Content and Structure Website Mining Model. Poster. In Proceedings of the 15th international Conference on World Wide Web (Edinburgh, Scotland, May 23 - 26, 2006). WWW '06. ACM Press, New York, NY, 957-958.
  • Baeza-Yates, R., Poblete, B.: A Website Mining Model Centered on User Queries. European Web Mining Forum (EWMF 2005), pp. 3-15. Oporto, Portugal.
  • Baeza-Yates, R., Poblete, B.: Dynamics of the Chilean Web Structure, New York, USA, May 2004.
  • Baeza-Yates, R., Poblete, B.: Evolution of the Chilean Web Structure Composition. In Proceedings of the First Latin American Web Congress (LA-WEB 2003). 2003. IEEE CS Press.
  • Baeza-Yates, R., Poblete, B.: Evolution of the Web Structure. In Proceedings of The Twelfth International World Wide Web Conference. Budapest, Hungary, 2003. Poster.

Ph.D. Thesis

Articles in Spanish and Catalan

Journal Papers 

Conference & Workshop Papers

  • D. Nettleton, B. Poblete. Técnicas Difusas y No-Difusas para el Clustering del Contenido de Páginas de un Sitio Web. XIII Congreso Español sobre Tecnologías y Lógica Fuzzy, Ciudad Real. 2006. (In Spanish).
  • R. Baeza-Yates, B. Poblete: Una herramienta de minería de consultas para el diseño del contenido y la estructura de un sitio Web. III Taller de Minería de Datos y Aprendizaje (TAMIDA), pp. 39-48. September 2005 (In Spanish).
  • G. Boleda, S. Bott, B. Poblete, C. Castillo, M.E. Fuenmayor, T. Badia, V. López. CuCWeb, un corpus del català construït a partir de la web. Congrés Societat del Coneixement. Barcelona, España, 2004. (In Catalan).
  • Ricardo A. Baeza-Yates, Barbara Poblete, Felipe Saint-Jean: Evolución de la Web Chilena 2002-2003. JCC2003, Chillan. Chile. (In Spanish).

MSc. Thesis

Technical Reports

Last update: April 29, 2015.