My research areas are artificial intelligence and natural language processing (NLP). My work with students and colleagues has been in discourse processing, pragmatics, word-sense disambiguation, and probabilistic classification in NLP. Our most recent work investigates automatically recognizing and interpretating expressions of opinions and sentiments in text, to support NLP applications such as question answering, information extraction, text categorization, and summarization.

Click here for publications, annotated data, and software.

Click here for recent tutorials and extended talks.

The MPQA opinion annotated corpus as well as the OpinionFinder automatic system and our subjectivity lexicon (including prior polarity/sentiment annotations) are available at http://www.cs.pitt.edu/mpqa

CS2710: Foundations of Artificial Intelligence

Recent program committees : ACL08 (Area Chair); AAAI08; COLING08; EMNLP07 (Area Chair); ACL 2007 Workshop on Frontiers in Linguistically Annotated Corpora (Co-Chair); ACL07; IJCAI07; AAAI07; NAACL07; International Conference on Weblogs and Social Media (ICWSM) 2007; ACL07 Student Research Workshop.

Talks and events:

Theresa Wilson successfully defended her PhD dissertation: Fine-Grained Subjectivity Analysis, May 2007.

Swapna Somasundaran Department of Homeland Security featured student, www.DHSNetwork.org, October 2007; presented "QA with Attitude: Exploiting Opinion Type Analysis for Improving Question Answering in On-line Discussions and the News" at ICWSM-2007; presented "Detecting Arguing and Sentiment in Meetings" at SIGDial-2007, September 2007.

Josef Ruppenhofer lectured at the MIAS Data Sciences Summer Institute Summer School, University of Illinois, June 2007

Jan Wiebe speaker at ISP Seminar, University of Pittsburgh, Nov 2007; speaker at a DIMACS technical symposium, Rutgers University, September 2007; speaker at the Visualization and Analytics Consortium speaker, Bellevue, WA, May 2007; EUROLAN Summer School on Semantics, Opinion, and Sentiment in Text lecturer, Iasi, Romania, July 2007; ROCLING 2007 keynote speaker, Taipei, Taiwan, September 2007; CMU IR talk series February 2008; Unified Linguistic Annotation research Workshop March 2008; Tutorial on Sentiment Analysis at ICWSM-2008, March 2008.

CERATOPS: Center for the Extraction and Summarization of Events and Opinions from Text. Department of Homeland Security.

Improving Subjectivity Analysis to Achieve High-Precision Information Extraction. National Science Foundation.

Toward a Comprehensive Linguistic Annotation of Language. National Science Foundation.

NLP Foundational Studies & Ontologies for Syndromic Surveillance from Emergency Department Reports. National Library of Medicine.

Click here for professional activities.

Josef Ruppenhofer

Cem Akkaya
Yaw Anti Gyamfi
Swapna Somasundaran

Pittsburgh Technology Council Career Center -- A good place to look for Computer Science jobs in Pittsburgh

SentimentAI Yahoo! group

Richard A. Wiebe New York State Senate Public Service Fellowship

Historic Pittsburgh Image Collections