Focus on movement data has increased as a consequence of the larger availability of such
data due to current GPS, GSM, RFID, and sensors techniques. In parallel, interest in …

Pervasive and mobile computing applications are dramatically increasing the amount of
personal data released to service providers as well as to third parties. Data includes …

A major feature of the emerging geo-social networks is the ability to notify a user when any
of his friends (also called buddies) happens to be geographically in proximity. This proximity …

Geo-social networks (GeoSNs) provide context-aware services that help associate location
with users and content. The proliferation of GeoSNs indicates that they're rapidly attracting …

Users can enjoy personalized services provided by various context-aware applications that
collect users' contexts through sensor-equipped smartphones. Meanwhile, serious privacy …

The widespread adoption of location-based services (LBS) raises increasing concerns for
the protection of personal location information. A common strategy, referred to as …

The rise of smartphones equipped with various sensors has enabled personalization of
various applications based on user contexts extracted from sensor readings. At the same …

Mobile advertising is an increasingly important driver in the Internet economy. We point out
fundamental trade-offs between important variables in the mobile advertisement ecosystem …

Mobile crowdsourcing (MC) is a transformative paradigm that engages a crowd of mobile
users (ie, workers) in the act of collecting, analyzing, and disseminating information or …

Online social networks often involve very large numbers of users who share very large
volumes of content. This content is increasingly being tagged with geo-spatial and temporal …