He holds a B.S. in Electrical Engineering & Computer Sciences and a Ph.D. in Computer Science from the University of California, Berkeley. His research interests include mobile computing and communication systems, human-computer interaction and computer-supported cooperative work. Current work focuses on mobile sensor devices and on technologies for emerging regions.He was part of TIER, a project in which Intel is collaborating with U.C. Berkeley on the design of appropriate technology for emerging regions. Various TIER sub-projects have connections with Intel's Emerging Markets Platforms Group (EMPG). His published research on this topic is based on fieldwork in Ghana and Kenya and a field visit to Chile.