495 About the Contributors Patrizia Grifoni is a researcher at the National Research Council of Italy since 1990, where she works within the staff researchers of MultiModal Laboratory of the Institute of Research on Population and Social Policies. She received her degrees in electronics engineering at the University of Rome "La Sapienza". From 1994 to 2000 she was professor of "Elaborazione digitale delle immagini" at the Univer- sity of Macerata. She is author of more than 70 papers in international journals, books and conferences. She served as referee of several international conferences, books and journals and is co-organiser of international research workshops and events. Her scientific interests have evolved from query languages for statistical and geographic databases to human-computer interaction, multimodal interaction and lan- guages, visual languages, visual interfaces, sketch-based interfaces, Web technologies, social networks. She was responsible for several projects funded by Italian and International Institutions.