Pervasive Computing [electronic resource] : 4th International Conference, PERVASIVE 2006, Dublin, Ireland, May 7-10, 2006. Proceedings / edited by Kenneth P. Fishkin, Bernt Schiele, Paddy Nixon, Aaron Quigley.

A Practical Approach to Recognizing Physical Activities -- Building Reliable Activity Models Using Hierarchical Shrinkage and Mined Ontology -- “Need to Know”: Examining Information Need in Location Discourse -- Collaborative Localization: Enhancing WiFi-Based Position Estimation with Neighborhood Links in Clusters -- Risks of Using AP Locations Discovered Through War Driving -- Declarative Support for Sensor Data Cleaning -- Detecting and Interpreting Muscle Activity with Wearable Force Sensors -- The Design of a Portable Kit of Wireless Sensors for Naturalistic Data Collection -- The Smart Tachograph – Individual Accounting of Traffic Costs and Its Implications -- Domino: Exploring Mobile Collaborative Software Adaptation -- Keep Your Eyes on the Road and Your Finger on the Trigger – Designing for Mixed Focus of Attention in a Mobile Game for Brief Encounters -- Unobtrusive Multimodal Biometrics for Ensuring Privacy and Information Security with Personal Devices -- LoKey: Leveraging the SMS Network in Decentralized, End-to-End Trust Establishment -- Scalability in a Secure Distributed Proof System -- Secure Mobile Computing Via Public Terminals -- iCAP: Interactive Prototyping of Context-Aware Applications -- iCam: Precise at-a-Distance Interaction in the Physical Environment -- Gesture Signature for Ambient Intelligence Applications: A Feasibility Study -- Exploring the Effects of Target Location Size and Position System Accuracy on Location Based Applications -- Displays in the Wild: Understanding the Dynamics and Evolution of a Display Ecology -- Modeling Human Behavior from Simple Sensors in the Home -- Using a Live-In Laboratory for Ubiquitous Computing Research -- The Diet-Aware Dining Table: Observing Dietary Behaviors over a Tabletop Surface -- Lessons for the Future: Experiences with the Installation and Use of Today’s Domestic Sensors and Technologies.

Welcometo the proceedingsofthe FourthInternationalConferenceonPervasive Computing. We are honored to serve as chairs in this conference series, founded in 2002, which has emerged as one of the most respected venues for publication of research in pervasive and ubiquitous computing. This year’s conference demonstrated the increasing breadth and depth of worldwide research on pervasive and ubiquitous computing, with a record n- ber of submissions (178) from a record number of countries (26). From among these high quality submissions, the Technical Program Committee accepted 24 papers. These papers were chosen solely on quality, using a double-blind review process. Therewasalsoastriking breadthof submissions.Thesubmissionscovered29 topics,rangingfromhealthcareapplicationstoembeddedsystemsprogramming, from sensor networking to ethnography, from novel user interface techniques to powerharvestinghardware.Thisyearthemostpopulartopicswereprogramming environments, location-aware computing, and cell-phone interaction techniques. Our ?rst thanks goes to all the 541 authors who submitted full papers to this conference. Presenting research work in a paper requires a great deal of e?ort. We hope that these authors were rewarded with insightful reviews and an enjoyable conference program. Any conference is only as strong as its reviewers and Program Committee. This is particularly true for this conference, which placed a very heavy load on its Program Committee. We were fortunate to have an outstanding and ha- workingProgramCommittee:eachProgramCommitteememberwasresponsible forpersonallyreadingandreviewingatleast15papers,andeachpaperdiscussed at the Program Committee meeting had been read by at least 3 Program C- mittee members.