The 7th International Conference on Ubiquitous Computing (UbiComp 2005) marked the ?rst time
that this premier venue for original research contributions in ubiquitous computing was held in
Asia. The Tokyo Japan venue re?ects the
desireoftheUbiCompcommunitytomakethisconferenceseriesaninternational event that showcases the
increasing amount of high-quality ubiquitous comp- ing researchthat is taking placeworldwide.As
the ?eld ofubiquitous computing has matured the UbiComp Conference has gained signi?cance
worldwide not only among researchers but also with industry and general society. This
interest in the potential of ubiquitous computing to impact our lives has resulted in the
creation of many new research programs in academia and industry. These e?orts have in turn
led to mass media coverage of e?orts and in some regions of the world large-scale
government-initiated collaborative - forts to explore the potential of these emerging
technologies. These trends are re?ected in the rise in the number of submissions to UbiComp
2005. This year the conference received 230 full papers submitted almost equally from Asia
(?100 submissions) North America and South America (?60 submissions) and
Europe(?60submissions) withtheremainderbeingreceivedfromAustraliaand Africa. Fromamong many
high-qualitysubmissions the technical programc- mittee accepted 22 papers. These paperswere
chosenbased solely on the quality of their peer reviews using a double-blind review process.
