Luke Barrington received the Ph.D. degree in electrical and computer engineering from the University of California at San Diego (UCSD), La Jolla, with a thesis titled “Machines that Understand Music.” He developed frequency-temporal models of music that learned to automatically describe audio content with relevant words. He pioneered research in human computation and crowd sourcing as a means to train machine learning models. During the Ph.D. degree, he co-founded the UCSD Computer Audition Laboratory, published over 20 articles in journals and conferences, and was awarded two patents. He currently serves as founder and CTO of Tomnod, inc., where he leads the development of online applications that collect analyses of satellite and aerial imagery data from tens of thousands of users. Dr. Barrington received the UCD Young Engineer of the year in 2001. In 2005, he was a National Science Foundation (NSF) EAPSI Fellow in Japan. From 2006 to 2008, he was the recipient of a U.S. NSF IGERT Fellowship and in 2010 he received the Qualcomm Innovation Fellowship. He is an avid musician and wails on the guitar.