Kajsa Ellegard is a Professor of Technology and social change at Linköping University, Sweden. Technology and Social Change is an interdisciplinary research unit focusing on how social actors create and use technology, and how technical change is woven together with cultural patterns, daily life, politics, energy systems, learning, and the economy in history and society. Her research interests include time-geography, the visualisation of activity patterns in everyday life, technologies embedded in daily activities, division of labor in households, developments in work life (technology, learning, work organization) and energy use in everyday life.