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UbiComp 2003, the 5th Annual Conference on Ubiquitous Computing, is the premier forum for presentation of research results in all areas relating to the - sign, implementation, deployment and evaluation of ubiquitous computing te- nologies. The conference brings together leading researchers, from a variety of disciplines, perspectives and geographical areas, who are exploring the impli- tions of computing as it moves beyond the desktop and becomes increasingly interwoven into the fabrics of our lives. This volume, the conference proceedings, contains the entire collection of high-quality full papers and technical notes from UbiComp 2003. There were 16 full papers in this year’s conference, selected by our international program committee from among 117 submissions. There were also 11 technical notes in the program: 8 taken from the 36 technical note submissions, and 3 that were adapted from full paper submissions. We are very grateful to Tim Kindberg and Bernt Schiele, our Technical Notes Co-chairs, and to all the authors and reviewers of both papers and technical notes who contributed to maintaining the high standards of quality for the conference. In addition to the full papers and technical notes, UbiComp 2003 also p- vided a number of other participation categories, including workshops, dem- strations, interactive posters, a panel, a doctoral colloquium and a video p- gram. While accepted submissions in these categories were also of high quality, timing and size constraints prevented us from including them in this volume.

Ubiquitous computing --- Computer Science --- Engineering & Applied Sciences --- Computer science. --- Computer communication systems. --- Special purpose computers. --- Software engineering. --- Operating systems (Computers). --- User interfaces (Computer systems). --- Computer Science. --- User Interfaces and Human Computer Interaction. --- Computer Communication Networks. --- Special Purpose and Application-Based Systems. --- Software Engineering. --- Operating Systems. --- Information Systems Applications (incl. Internet). --- Computer operating systems --- Computers --- Disk operating systems --- Systems software --- Computer software engineering --- Engineering --- Informatics --- Science --- Operating systems --- Application software. --- Application computer programs --- Application computer software --- Applications software --- Apps (Computer software) --- Computer software --- Special purpose computers --- Communication systems, Computer --- Computer communication systems --- Data networks, Computer --- ECNs (Electronic communication networks) --- Electronic communication networks --- Networks, Computer --- Teleprocessing networks --- Data transmission systems --- Digital communications --- Electronic systems --- Information networks --- Telecommunication --- Cyberinfrastructure --- Electronic data processing --- Network computers --- Interfaces, User (Computer systems) --- Human-machine systems --- Human-computer interaction --- Distributed processing --- User interfaces (Computer systems) --- Computer networks. --- Computers, Special purpose. --- Operating systems (Computers)

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Engineering & Applied Sciences --- Computer Science --- Information Technology --- Computer Science (Hardware & Networks)

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Context is of crucial importance for research and applications in many disciplines, as evidenced by many workshops, symposia, seminars, and conferences on specific aspects of context. The International and Interdisciplinary Conference on Modeling and Using Context (CONTEXT), the oldest conference series focusing on context, provides a unique interdisciplinary emphasis, bringing together participants from a wide range of disciplines, including artificial intelligence, cognitive science, computer science, linguistics, organizational science, philosophy, psychology, ubiquitous computing, and application areas such as medicine and law, to discuss and report on context-related research and projects. Previous CONTEXT conferences were held in Rio de Janeiro, Brazil (1997), Trento, Italy (1999, LNCS 1688), Dundee, UK (2001, LNCS 2116), and Palo Alto, USA (2003, LNCS 2680). CONTEXT 2005 was held in Paris, France during July 5–8, 2005. There was a strong response to the CONTEXT 2005 Call for Papers, with 120 submissions received. A careful review process assessed all submissions, with each paper first reviewed by the international Program Committee, and then reviewer discussions were initiated as needed to assure that the final decisions carefully considered all aspects of each paper. Reviews of submissions by the Program Chairs were supervised independently and anonymously, to assure fair consideration of all work. Out of the 120 submissions, 23 were selected as full papers for oral presentation, and 20 were selected as full papers for poster presentation. These outstanding papers are presented in this proceedings.

Engineering mathematics. --- Engineering --- Social sciences --- Artificial intelligence. --- Machine theory. --- Digital humanities. --- Mathematical and Computational Engineering Applications. --- Computer Application in Social and Behavioral Sciences. --- Artificial Intelligence. --- Formal Languages and Automata Theory. --- Digital Humanities. --- Data processing. --- Computer simulation --- Context (Linguistics)

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AmbientIntelligence(AmI)wasintroducedinthelate1990sasanovelparadigm for electronic environments for the years 2010-2020. The concept builds on the earlyideasofWeiser,whowasaimingatanovelmobilecomputinginfrastructure integrated into the networked environment of people. AmI takes the embedding of computing devices one step ahead by integrating computational intelligence into the entire surrounding of people, thus moving technology fully to the ba- ground and the user into the foreground by supporting him or her with intuitive and natural interaction concepts. According to the de?nition, AmI refers to smart electronic environments that are sensitive and responsive to the presence of people. Since its introduction the vision has grown mature, so as to become quite in?uential in the development of new concepts for information processing, combiningmulti-disciplinary?eldsincludingelectricalengineering,computers- ence, industrial design, user interfaces, and cognitive sciences. The AmI paradigm provides a basis for new models of technological inno- tion within a multi-dimensional society. The added value of the AmI vision lies inthefactthatthelarge-scaleintegration of electronics into the environment enables the actors, i.e., people and objects, to interact with their surrounding in a seamless, trustworthy, and natural manner. This is directly connected to the growing societal need for communication and the exchange of information.

Computer architecture. Operating systems --- Information systems --- Artificial intelligence. Robotics. Simulation. Graphics --- Computer. Automation --- ICT (informatie- en communicatietechnieken) --- informatica --- maatschappij --- informatiesystemen --- KI (kunstmatige intelligentie) --- OS (operating system) --- computernetwerken --- robots