Traffic Density Estimation Protocol Using Vehicular Networks.- Mobile-to-Mobile Video Recommendation.- Dual Codes: Backward Compatible Multi-layer 2D-Barcodes.- A Collaborative Framework of Enabling Device Participation in Mobile Cloud Computing.- Design and Evaluation of a Publish/Subscribe Framework for Ubiquitous Systems.- Where am I? Using Mobile Sensor Data to Predict a User's Semantic Place with a Random Forest Algorithm.- Recognizing a Mobile Phone's Storing Position as a Context of a Device and a User.- Privacy Preserving Social Mobile Applications.- Fine-Grained Transportation Mode Recognition Using Mobile Phones and Foot Force Sensors.