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, extended talks, and bibliography of work in subjectivity and sentiment analysis.

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

CS3730: Advanced Topics in Natural Language Processing: Subjectivity and Sentiment Analysis

Recent program committees : ACL-IJCNLP09 (Program Co-Chair); 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.

Events:

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

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



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.

Subjectivity and Word Sense. National Science Foundation.

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