Faculty Bibliography

Evaluating journal quality and finding high-quality articles in the biomedical literature are challenging information retrieval tasks. The most widely used method for journal evaluation is impact factor, while novel approaches for finding articles are PubMed's clinical query filters and machine learning-based filter models. The related literature has focused on the average behavior of these methods over all topics. The present study evaluates the variability of these approaches for different topics. We find that impact factor and clinical query filters are unstable for different topics while a topic-specific impact factor and machine learning-based filter models appear more robust. Thus when using the less stable methods for a specific topic, researchers should realize that their performance may diverge from expected average performance. Better yet, the more stable methods should be preferred whenever applicable

Learning a Bayesian network from data is an important problem in biomedicine for the automatic construction of decision support systems and inference of plausible causal relations. Most Bayesian network learning algorithms require discrete data; however discretization may impact the quality of the learned structure. In this project, we present a comparison of different approaches for learning from continuous data to identify the most promising one and to quantify the impact of discretization in Bayesian network learning