My research is in machine learning with an emphasis on natural language processing. More specifically, I primarily study machine learning scenarios where there is an interaction with a domain expert during the learning procedure (active learning, interactive knowledge acquisition) and scaling these protocols up to real-world applicability. Therefore, I am also interested in the examination of complex output spaces (e.g. structured output, ranking data), exploring methods to exploit interdependencies between learned classifiers (e.g. structured learning), and effectively utilizing unlabeled data whenever possible (e.g. unsupervised learning, domain adaptation).

• Challenges and Opportunities in Applied Machine Learning (AI Magazine 2012)
• Deploying an Interactive Machine Learning System in an Evidence-Based Practice Center (IHI 2012)
• Class Imbalance, Redux (ICDM 2011)
• The Constrained Weight Space SVM: Learning with Ranked Features (ICML 2011)
• Who Should Label What? Instance Allocation in Multiple Expert Active Learning (SDM 2011)
• Modeling Annotation Time to Reduce Workload in Comparative Effectiveness Reviews (IHI 2010)
• Active Learning for Biomedical Citation Screening (KDD 2010)
• Interactive Feature Space Construction using Semantic Information (CoNLL 2009)
• Sequential Learning of Classifiers for Structured Prediction Problems (AISTATS 2009)
• Unsupervised Rank Aggregation with Distance-based Models (ICML 2008)
• Active Learning for Pipeline Models (AAAI 2008)
• Margin-based Active Learning for Structured Output Spaces (ECML 2006)

In Spring 2012, I taught a course at Boston University on Machine Learning. Also in Fall 2011, I taught a course with Byron Wallace on Artificial Intelligence in Health Informatics.

Of course, I am always interested in collaborations; if you have any ideas where you believe I could make a meaningful contribution, please contact me.

As you can see, this page is chiefly regarding my professional life. When I am not working, I read a fair amount of books (mostly short story anthologies and political policy) and watch DVDs (primarily documentaries and television series). While I haven't had cable television for almost a decade now, my Netflix and Podcast subscriptions have done an admirable job filling in the void. My brother, Patrick, is a professional comedian and often performs in the Chicagoland area; therefore, he thinks he is the first WordNet adjective sense of funny and thinks I am the second. Before returning to graduate school, I worked at Lucent Technologies - Bell Labs and while in the PhD program, I completed two summer internships at Motorola Labs. Finally, despite the contents of this page (including the somewhat pretentious picture of me), I don't take myself nearly this seriously. ;)