Tanmoy Bhattacharya, Ph.D., SFI External Professor and Scientist 5, T-2, Los Alamos National Laboratory. Dr. Bhattacharya attended the Indian Institute of Technology where he received a Bachelor of Science degree in 1982 and Master of Science degree in 1984. In 1989, Dr. Bhattacharya received his Doctorate of Philosophy in Physics from the Tata Institute of Fundamental Research. He then joined the Brookhaven National Laboratory at Brookhaven in Long Island as a postdoctoral fellow. After two years in Long Island, Dr. Bhattacharya moved to France to work at Service de Physique Theorique. In November 1992, he moved back to the United States to join the high-energy particle theory group at Los Alamos National Laboratory in New Mexico as a postdoc and in 1999 he became a regular staff member at Los Alamos Labs. Dr. Bhattacharya joined SFI as part time resident faculty in 2005. Dr. Bhattacharya's research areas include: Particle physics and Physics of Complex Systems; Phylogenetics and Emergence in Evolutionary Systems; HIV Biology and Vaccine Design; Quantitative Studies of Linguistics and Human Behavior; and Computer Security and Machine Learning with application to the Health Sciences.