Lionel Tarassenko is Professor of Electrical Engineering and Director at the University of Oxford. He is a world-leading expert in the application of signal processing to medical systems, with a strong track record in translation to clinical medicine. His work has had a major impact on the identification of deterioration in acute care and on the self-management of long-term conditions using mobile communications. He has been a pioneer in developing early warning systems for acutely-ill patients. The data fusion system which he designed for patient monitoring is the first such system to gain FDA approval.