I currently work at Oak Ridge National Laboratory (ORNL) as a research scientist in the Geographic Information Science and Technology (GIST) group, under the Computational Sciences and Engineering Division (CSED). My new webpage is available here.

I completed my PhD from Computer Science Department at University of Minnesota under Dr. Vipin Kumar and Dr. Arindam Banerjee. I received my Bachelor of Technology (B. Tech.) degree in Computer Science and Engineering from Indian Institute of Technology (IIT), Madras, India in 2002.

I research in the field of data mining, machine learning, and applied algorithms, with emphasis on critical event (e.g. anomalies) detection and characterization, sequence and time-series modeling, similarity measures, and summarization applied across diverse real domains. A copy of my PhD dissertation can be found here. My research finds success in remote sensing, image analysis, cyber-intrusion detection, aircraft health management (detecting faults during an aircraft operation), climatology, tax fraud detection, and click fraud detection. For my ongoing research visit my current web page. For more information about my PhD research visit my research page. My resume is available here [pdf, ps].

I also maintain a repository of benchmark data sets which can be used to evaluate anomaly detection algorithms for discrete sequence databases and time series databases. I have also written a C++ package consisting of different anomaly detection techniques for sequences. More details are available here.