The context toolkit: aiding the development of context-enabled applications
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
Cell-ID Location Technique, Limits and Benefits: An Experimental Study
WMCSA '04 Proceedings of the Sixth IEEE Workshop on Mobile Computing Systems and Applications
ContextPhone: A Prototyping Platform for Context-Aware Mobile Applications
IEEE Pervasive Computing
Proceedings of the 7th international conference on Human computer interaction with mobile devices & services
Reality mining: sensing complex social systems
Personal and Ubiquitous Computing
Proceedings of the 6th ACM conference on Embedded network sensor systems
Human-Computer Interaction
Mobile Python: Rapid prototyping of applications on the mobile platform
Mobile Python: Rapid prototyping of applications on the mobile platform
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
Place lab: device positioning using radio beacons in the wild
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
Mobile context inference using low-cost sensors
LoCA'05 Proceedings of the First international conference on Location- and Context-Awareness
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We describe an open framework utilizing sensors and application data on S60 mobile phones enabling rapid prototyping of context-aware mobile applications. The framework has an extensible layered architecture allowing new sensors and features to be added to the context framework as they become available on mobile phone platforms. The framework provides access to multiple sensors to derive user context, and we present results from experiments with two prototype applications built using the toolbox. Initial experiments have been carried out to validate the data obtained by the tool. In the experiments 14 participants have been continuously using a Nokia N95 mobile phone with a context logger application for an average of 48 days per user and covering 70% of the time. The study has provided valuable insights into the performance issues of the system in real-life usage situations, including the stability of and power consumption in the system.