This book constitutes the refereed proceedings of the 9th International Conference on Pervasive Computing, Pervasive 2011, held in San Francisco, USA, in June 2011. The 19 revised full papers and three short papers presented were carefully reviewed and selected from 93 submissions. The contributions are grouped into the following topical sections: practices with smartphones; sensing at home, sensing at work; predicting the future; location sensing; augmenting mobile phone use; pervasive computing in the public arena; public displays; hands on with sensing; sensing on the body.

This book constitutes the refereed proceedings of the Third International Symposium on Location- and Context-Awareness, LoCA 2007, held in Oberpfaffenhofen, Germany, in September 2007.

The 17 revised full papers presented were carefully selected during two rounds of reviewing and improvement from 55 submissions. The papers are organized in topical sections on wifi location technology, activity and situational awareness, taxonomies, architectures, and a broader perspective, the meaning of place, radio issue in location technology, and new approaches to location estimation.