He completed his PhD in informatics (2000) with a focus on computer-supported collaborative learning. His current focus in research and teaching is mobile and ubiquitous computing and participatory approaches to interaction design. He has published about 20 peer-reviewed scientific articles.Jörn has taught interaction design in bachelor’s-level university courses since 1990 and in master’s-level university courses since 1995. He has been involved in running the influential two-year master’s program in interaction design at Malmö University since its start in 1998. He has also done consulting in interaction design for companies including Sony Ericsson, Epsilon and Inxl.