M.I.T. Professor Bill Mitchell, the director of the university's Smart Cities research group, died yesterday after a battle with cancer, according to posts on CaringBridge and BoingBoing

When Big Think interviewed Mitchell in January, he spoke about a wide variety of topics related to mobility, sustainability, and the future of cities. Smart Cities research is particularly concerned with the emerging roles of networked intelligence in fabrication and construction, urban mobility, building design and intelligently responsive operation, and public space. Mitchell described his research as being related to the "ability of cities to, over time, remain in balance with the resource streams that are available to them, and they have to do with social justice and equity of the fundamental conditions of satisfactory citizenship."

Mitchell was the author of a number of books on the future of cities, including Me++: The Cyborg Self and the Networked City, City of Bits, and e-topia.