I have worked on various aspects of search relevance, application of machine learning to web search related problems, data mining and feature engineering for the last 4 years at Yahoo! I have published research on active learning based on my work at Yahoo as well as prior work. Before returning to the machine learning field and its applications in NLP and Search, I was a postdoctoral fellow in cardiology at the Baylor College of Medicine in Houston, TX. My research there was on solving inverse problems for designing medical instruments to map cardiac electrophysiology. I obtained my PhD from Purdue University in Electrical and Computer Engineering. My thesis was on solving inverse problems in signal processing using block iterative methods. My MS is also from Purdue in EE and my thesis work was on neural networks. I am a graduate of Bilkent University in Turkey where I studied Electrical and Electronics Engineering.