Martina Zitterbart is full professor in computer science at the University of Karlsruhe, Germany. She received her doctoral degree form the University of Karlsruhe in 1990. From 1987 to 1995 she was Research Assistant at the University of Karlsruhe . From 1991 – 1992 she was on leave of absence as a Visiting Scientist at the IBM T.J. Watson Research Center, Yorktown-Height, NY. She was Visiting Professor at the University of Magdeburg and the University of Mannheim and full professor at the Technical University of Braunschweig (1995 – 2001). Her primary research interests are in the areas of multimedia communication systems, mobile and ubiquituous computing, ambient technologies as well as Elearning. She is member of the IEEE (served on the Board of Governers of the communication society 95-98), ACM and the German Gesellschaft für Informatik. In 2002 Martina Zitterbart received the Alcatel SEL research award on technical communication. In 2003 she was General Co-Chair of the ACM SIGCOMM conference which was held in Karlsruhe , Germany .