Deepak Ravichandran

I obtained my PhD from the University of Southern California in Computer Science under the guidance of my advisor Dr. Eduard Hovy in August 2005. My primary research interest is in the field of Natural Language Processing. I have started working at Google since September 2005.

[ ps, pdf ]

yasmetFS (Yet Another Simple Maximum Entropy Toolkit with Feature Selection)
           Software written by Deepak Ravichandran and Franz Josef Och. 2003.
           Implementation of "A Maximum Entropy Approach to Natural Language Processing" by [Berger, Pietra & Pietra 1996].

• Terascale Knowledge Acquisition [ ps, pdf ]
          PhD thesis, Department of Computer Science, University of Southern California.
             Deepak Ravichandran. 2005.
  
  
• Randomized Algorithms and NLP: Using Locality Sensitive Hash Functions for High Speed Noun Clustering [ ps, pdf ]
          In Proceedings of ACL, Ann Arbour, MI.
             Deepak Ravichandran, Patrick Pantel, and Eduard Hovy. 2005.
  
  
• ISI Novelty TRack System for TREC 2004 [ ps, pdf ]
          In Proceedings of the TREC 2004 conference.
             Soo-Min Kim, Deepak Ravichandran, and Eduard Hovy. 2004.
  
  
• Towards Terascale Knowledge Acquisition [ ps, pdf ]
          In Proceedings of the COLING conference, Geneva, Switzerland.
             Patrick Pantel, Deepak Ravichandran, and Eduard Hovy. 2004.
  
  
• The Terascale Challenge. [ ps, pdf ]
          In proceedings of KDD Workshop on Mining for and from the Semantic Web (MSW-04). Seattle, WA.
             Deepak Ravichandran, Patrick Pantel, and Eduard Hovy. 2004.
  
  
• Automatically Labeling Semantic Classes [ ps, pdf ]
          In Proceedings of the HLT-NAACL conference, Boston, MA.
             Patrick Pantel and Deepak Ravichandran. 2004.
  
  
• How to select an answer string? [ ps, pdf ] (to appear)
          Book-Chapter -- Advances in Textual Question Answering, Tomek Strzalkowski and Sanda Harabagiu eds., Kluwer
             Abdessamad Echihabi, Ulf Hermjakob, Eduard Hovy, Daniel Marcu, Eric Melz and Deepak Ravichandran. 2004.
  
  
• Multiple-Engine Question Answering in TextMap [ ps, pdf ]
          In Proceedings of TREC 2003 conference
             Abdessamad Echihabi, Ulf Hermjakob, Eduard Hovy, Daniel Marcu, Eric Melz and Deepak Ravichandran. 2003.
  
  
• Statistical QA - Classifier vs Re-ranker: What's the difference? [ ps, pdf ]
          In Proceedings of the ACL Workshop on Multilingual Summarization and Question Answering--Machine Learning and Beyond, Sapporo, Japan.
             Deepak Ravichandran, Eduard Hovy and Franz Josef Och. 2003.
  
  
• Automatic Derivation of Surface Text Patterns for a Maximum Entropy Based Question Answering System. [ ps, pdf ]
          In Proceedings of the HLT-NAACL conference, Edmonton, Canada.
             Deepak Ravichandran, Abraham Ittycheriah and Salim Roukos. 2003.
  
  
• Using Knowledge to Facilitate Factoid Answer Pinpointing. [ ps, pdf ]
          In Proceedings of the 19th COLING conference, Taipei, Taiwan.
             Eduard Hovy, Ulf Hermjakob, Chin-Yew Lin, Deepak Ravichandran. 2002.
  
  
• Learning Surface Text Patterns for a Question Answering system. [ ps, pdf ]
          In Proceedings of the 40th ACL conference. Philadelphia, PA.
             Deepak Ravichandran and Eduard Hovy. 2002
  
  
• A Question/Answer Typology with Surface Text Patterns. [ ps, pdf ]
          In Proceedings of the DARPA Human Language Technology Conference (HLT). San Diego, CA.
             Eduard Hovy, Ulf Hermjakob, and Deepak Ravichandran. 2002.
  
  
• Toward Semantics-Based Answer Pinpointing. [ ps, pdf ]
          In Proceedings of the DARPA Human Language Technology Conference (HLT). San Diego, CA.
             Hovy, E.H., L. Gerber, U. Hermjakob, C.-Y. Lin, and D. Ravichandran. 2001.