About the Author
Pablo Cesar is a postdoctoral researcher at CWI (The National Research Institute for Mathematics and Computer Science in the Netherlands) in Amsterdam. He received a Dr Tech degree (December 2005) from Helsinki University of Technology (Finland) and a MSc degree (February 2002) from Universidad Politecnica de Madrid (Spain). Pablo Cesar has (co)authored over 40 articles (conference papers and journal articles) about multimedia systems and infrastructures, media sharing, interactive media, multimedia content modelling, and user interaction. He is, as well, involved in standardization activities (e.g., SMIL from W3C). He is co-editor of the TOMCCAP special issue ï¿½Human-Centred Television: Directions in Interactive Digital Television Research.ï¿½ In addition, he was the general chair of the 5th European Interactive conference (EuroITV2007) and has given tutorials about Interactive Digital Television in prestigious conferences such as ACM Multimedia and WWW Conferences. David Geerts has a master in Communication Science at the K.U.Leuven and a master in Culture and Communication at the K.U.Brussel. He leads the Centre for User Experience Research (CUO), part of the Katholieke Universiteit Leuven (Belgium) as well as the Interdisciplinary Institute for Broadband Technology (IBBT), is involved in several research projects on user-centered design and evaluation, and is taking his doctorï¿½s degree on Sociability of Interactive Television, with the purpose of developing guidelines and heuristics for designing and evaluating social television interfaces. He organized several workshops and SIGs at CHI2006, CHI2007 and CHI2008 and two workshops on Social Interactive Television at EuroITV2007 and EuroITV2008. David Geerts is co-founder of the Belgian SIGCHI.be chapter and program chair of EuroITV2009, the 7th European Interactive TV Conference. Konstantinos Chorianopoulos is a European Commission Marie Curie fellow at the Department of Architecture at the Bauhaus University of Weimar. He is also an adjunct lecturer at the Department of Product and System Design Engineering at the University of the Aegean. He holds an MEng (electronics and computer engineering, 1999), an MSc (marketing and communication, 2001), and a PhD (human-computer interaction, 2004). During his studies and research, he has been affiliated with engineering, business, and applied arts universities. Since 1997, he has worked in four academic research labs (Greece, UK, Germany), which specialize in the areas of multimedia, e-commerce, intelligent systems and interaction design. He has participated in many EC-funded research projects in the field of human-computer interaction for information, communication and entertainment applications in TV, mobile, and situated computing devices. In 2002, he founded UITV.INFO (http://uitv.info), which is a newsletter and Web portal for interactive television research resources (papers, theses), news and events. He is the main author of more than 10 journal papers and he has lectured internationally (conferences, tutorials, seminars, guest lectures) on several aspects (design, engineering, evaluation, management) of interactive TV. He is serving on the editorial boards of ACM Computers in Entertainment and of the Journal of Virtual Reality and Broadcasting.