I joined the Computer Science Department at U.T.Dallas in January 2002, coming from U.T. Austin, where I was a faculty member in the Department of Computer Sciences.
My research interests include Natural Language Processing, Information Retrieval, Knowledge Processing, Artificial Intelligence and more recently Medical Informatics.
I have been interested for a long time in Textual Question-Answering, reference resolution and textual cohesion and coherence.
In 2006 I co-edited a book entitled Advances in Open Domain Question Answering.
I have also co-organized several workshops, symposia, tutorials and research tracks focusing on Textual Question-Answering or Reference Resolution.
In my research I combine knowledge extracted from the Web with knowledge coerced from large
domain-specific knowledge bases
(e.g. the Unified Medial Language System (UMLS)
to model the semantics of language in texts. By learning
knowledge embeddings for UMLS ,
superior recognition of relations in clinical documents can be achieved. UMLS knowledge embeddings can also inform the
of biomedical knowledge embeddings used for alignining biomedial knowledge bases.
More recently I have been fascinated by the discovery of
misinformation on social media and its impact on vaccine hesitancy.
I am a past recipient of an NSF CAREER Grant for studying reference resolution.
I am a member of AMIA, AAAI, ACL, ACM SIGIR, IEEE Computer Society. I am also the Director of the Human Language Technology Research Institute at University of Texas at Dallas.