Sonia Grego

Associate Research Professor in Electrical and Computer Engineering

Sonia Grego, Ph.D.; Dr. Grego has been developing health-focused engineering innovations for 15 years with expertise in sensors, diagnostics, systems miniaturization and tissue bioengineering.  Her research interests include sensors for digital sanitation solutions and technologies for early detection of disease. She directs global field-testing of transformative sanitation technologies prototypes, particularly in India. She has served on NIH review panels for 10 years, served as co-chair of multiple symposia, co-authored more than 50 scientific publications and has been awarded four patents. Visit Scholars@Duke for more information.

Leadership Team


Brian Stoner

Research Professor in Electrical and Computer Engineering

Brian Stoner, Ph.D.; Principal Investigator (PI) and Director of the Duke University Center for WaSH-AID (Water, Sanitation, Hygiene and Infectious Disease), Research Professor in the Department of Electrical and Computer Engineering at Duke University. Dr. Stoner is a materials scientist with expertise in the synthesis, processing, and characterization of materials using electrical, electrochemical and plasma techniques. He holds 28 U.S. patents related to novel microelectronic materials and systems, and has authored or co-authored two book chapters and more than 200 scientific publications. Visit Scholars@Duke for more information.


Krishnendu Chakrabarty

John Cocke Distinguished Professor of Electrical and Computer Engineering

Krishnendu Chakrabarty, Ph.D.; Professor and Chair of Electrical and Computer Engineering Department, Duke University. Dr. Chakrabarty is an expert in machine learning for time-series data analytics. He has developed solutions for failure prediction in complex electronic systems. His research interests include 3D circuit integration and system-on-chip, microfluidic biochips, hardware security, and neuromorphic computing systems. Visit Scholars@Duke for more information.  



Jose R. Ruiz

Senior Gastroenterology & Hepatology Fellow

Dr. Ruiz is a senior Gastroenterology & Hepatology Fellow at Duke University School of Medicine and will soon be joining the University of Pennsylvania to complete training in Advanced Therapeutic Endoscopy. Dr Ruiz has broad research interests in the field of general gastroenterology, endoscopy, population health, and artificial intelligence. He has presented his research at several national and international conferences, including Digestive Disease Week and the Annual Scientific Meeting of the American College of Gastroenterology. Dr. Ruiz has been working and collaborating closely with the Smart Toilet team for several years.  

Former Collaborators


Geoffrey Ginsburg

Geoffrey Steven Ginsburg, M.D., Ph.D.; Chief Medical and Scientific Officer of the National Intitutes of Health's All of Us Research Program. Dr. Ginsburg was founding director for the Duke University Center for Applied Genomics & Precision Medicine, where he pioneered translational genomics, the development of novel diagnostics, and precision medicine. He also served as a professor of Medicine, Pathology, and Biostatistics and Bioinformatics in the Duke University School of Medicine, professor of Biomedical Engineering in the Pratt School of Engineering, and a professor in the School of Nursing.


Deborah Anne Fisher

Deborah Fisher, M.D.; Lead Clinical Research Physician for Gastroenterology for Eli Lilly's US Medical Affairs. Previously at Duke University School of Medicine, Dr. Fisher provided patient care as a general gastroenterologist and conducted clinical research, with interests in outcomes research, big data analysis, and collaborations with the School of Engineering on GI clinical applications of new technology. Her educational activities have included clinical teaching, research mentoring, and directing the Department of Medicine MENTORS program for research fellows.