Josiah Hester works broadly in computer engineering, with a special focus on wearable devices, edge computing, and cyber-physical systems. His Ph.D. work focused on energy harvesting and battery-free devices that failed intermittentently. He now focuses on sustainable approaches to computing, via designing health wearables, interactive devices, and large-scale sensing for conservation. 
   
His work in health is focused on increasing accessibility and lowering the burden of getting preventive and acute healthcare. In both situations, he designs low-burden, high-fidelity wearable devices that monitor aspects of physiology and behavior, and use machine learning techniques to suggest or deliver adaptive and in-situ interventions ranging from pharmacological to behavioral. 
   
His work is supported by multiple grants from the NSF, NIH, and DARPA. He was named a Sloan Fellow in Computer Science and won his NSF CAREER in 2022. He was named one of Popular Science's Brilliant Ten, won the American Indian Science and Engineering Society Most Promising Scientist/Engineer Award, and the 3M Non-tenured Faculty Award in 2021. His work has been featured in the Wall Street Journal, Scientific American, BBC, Popular Science, Communications of the ACM, and the Guinness Book of World Records, among many others.

Stephen E. Ralph is a Professor with the School of Electrical and Computer Engineering at Georgia Tech. He received the BEE degree in Electrical Engineering with highest honors from the Georgia Institute of Technology in 1980. He received a Ph.D. in Electrical Engineering from Cornell University in 1988 for his work on highly nonequilibrium carrier transport in semiconductor devices. He is currently the director of the Georgia Electronic Design Center, a cross-disciplinary electronics and photonics research center focused on the synergistic development of high-speed electronic components and signal processing to enable revolutionary system performance. He is also the founder and director of the new Terabit Optical Networking Consortium, an industry led communications and information technology consortium. Prior to Georgia Tech he held a postdoctoral position at AT&T Bell Laboratories and was a visiting scientist with the Optical Sciences Laboratory at the IBM T. J. Watson research center. He has widely published in peer-reviewed journals and conferences and holds more than 10 patents in the fields of optical communications, optical devices and signal processing. His current research focuses on high-speed optical communications systems including modulation formats, coherent receivers, microwave photonics, integrated photonics and signal processing. Ralph is an Associate Editor of the IEEE Transactions on Electronic Devices. He is a Fellow of the Optical Society (OSA).