I am a PhD student in the Department of Computer Science & Engineering at the University of Washington. My advisors are Dan Weld and Luke Zettlemoyer, and I have also collaborated with James Fogarty.

My research interests are in the intersections of natural language processing, machine learning, and human-computer interaction.

Publications

• Ontological Smoothing for Relation Extraction with Minimal Supervision. [Paper]
  Congle Zhang, Raphael Hoffmann, Daniel S. Weld.
  In Proceedings of the 26th AAAI Conference on Artificial Intelligence (AAAI), 2012.
  Acceptance rate: 26%.
  
  
• Knowledge-Based Weak Supervision for Information Extraction of Overlapping Relations. [Paper] [Slides] [Source code]
  Raphael Hoffmann, Congle Zhang, Xiao Ling, Luke Zettlemoyer, Daniel S. Weld.
  In Proceedings of the Annual Meeting of the Association for Computational Linguistics (ACL), 2011.
  Acceptance rate: 26%.
  
  
• Learning 5000 Relational Extractors. [Paper] [Slides]
  Raphael Hoffmann, Congle Zhang, Daniel S. Weld.
  In Proceedings of the Annual Meeting of the Association for Computational Linguistics (ACL), 2010.
  Acceptance rate: 25%.
  
  
• Semi-Supervised Learning of Semantic Classes for Query Understanding – from the Web and for the Web. [Paper]
  Ye-Yi Wang, Raphael Hoffmann, Xiao Li, Jakub Syzmanski.
  In Proceedings of the ACM Conference on Information and Knowledge Management (CIKM), 2009.
  Acceptance rate: 15%.
  
  
• Using Wikipedia to Bootstrap Open Information Extraction. [Paper]
  Daniel S. Weld, Raphael Hoffmann, Fei Wu.
  In ACM SIGMOD Record 2009
  
  
• Amplifying Community Content Creation Using Mixed-Initiative Information Extraction. [Paper] [Slides] [Madness]
  Raphael Hoffmann, Saleema Amershi, Kayur Patel, Fei Wu, James Fogarty, Daniel S. Weld.
  In Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI), 2009.
  Acceptance rate: 25%.
  Nomination for best-paper award
  
  
• Information Extraction from Wikipedia: Moving Down the Long Tail. [Paper]
  Fei Wu, Raphael Hoffmann, Daniel S. Weld.
  In Proceedings of the ACM International Conference on Knowledge Discovery and Data Mining (KDD), 2008.
  Acceptance rate: 19%.
  
  
• Intelligence in Wikipedia. [Paper]
  Daniel S. Weld, Fei Wu, Eytan Adar, Saleema Amershi, James Fogarty, Raphael Hoffmann, Kayur Patel, Michael Skinner.
  In 23rd AAAI Conference, Chicago, USA 2008.
  
  
• Evaluating Visual Cues for Switching Windows on Large Screens. [Paper] [Slides] [Madness]
  Raphael Hoffmann, Patrick Baudisch, Daniel S. Weld.
  In Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI), 2008.
  Acceptance rate: 22%.
  
  
• Assieme: Finding and Leveraging Implicit References in a Web Search Interface for Programmers. [Paper] [Slides]
  Raphael Hoffmann, James Fogarty, Daniel S. Weld.
  In Proceedings of the ACM Symposium on User Interface Software and Technology (UIST), 2007.
  Acceptance rate: 19%.
  Highest rated paper
  
  
• Fast and Robust Interface Generation for Ubiquitous Applications. [Paper]
  Krzysztof Gajos, David B. Christianson, Raphael Hoffmann, Tal Shaked, Kiera Henning, Jing Jing Long, and Daniel S. Weld.
  In Proceedings of the Seventh International Conference on Ubiquitous Computing (UbiComp), 2005.
  Acceptance rate: 9%.
  
  
• Tool Supported Development of Energy-aware Real-time Applications for Embedded Systems. [Paper (PS)]
  Markus Ramsauer, Michael Coduro, and Raphael Hoffmann.
  In Proceedings of the 16th Euromicro Conference on Real-Time Systems (ECRTS), 2004.
  
  

Workshop Papers, Demos

• Supporting rule-based representations with corpus-derived lexical information. [Paper]
  Annie Zaenen, Cleo Condoravdi, Daniel G. Bobrow, Raphael Hoffmann.
  In NAACL/HLT Workshop on Formalisms and Methodology for Learning by Reading, 2010.
  
  
• Amplifying Community Content Creation Using Mixed-Initiative Information Extraction (Demo). [Demo Paper]
  Raphael Hoffmann, Saleema Amershi, Kayur Patel, Fei Wu, James Fogarty, Daniel S. Weld.
  In Proceedings of the ACM Symposium on User Interface Software and Technology (UIST), 2008.
  
  
• Augmenting Wikipedia-Extraction with Results from the Web. [Paper]
  Fei Wu, Raphael Hoffmann, Daniel S. Weld.
  In the "Wikipedia and Artificial Intelligence: An Evolving Synergy" Workshop at 23rd AAAI Conference, 2008.
  
  
• End-user Programming at the University of Washington. [Paper]
  Daniel S. Weld, Pedro Domingos, Raphael Hoffmann, and Sumit Sanghai.
  In CHI’06 Workshop on End-User Software Engineering, 2006
  
  
• Improving User Interface Personalization. [Paper]
  Krzysztof Gajos, Raphael Hoffmann, and Daniel S. Weld.
  In Proceedings of UIST’04, 2004
  
  

Software

• MultiR --- our system for relation extraction using knowledge-based weak supervision

Other stuff