Foreword by M. Tamer Ozsu Introduction UBI-MEDIA INFRASTRUCTURE Peer-to-Peer Streaming Systems, V. Gau, P-J Wu, Y-H Wang, and J-N Hwang The Design of VoIP Systems with High Perceptual Conversational Quality, B.W. Wah and B. Sat A Hybrid Approach to Communicate between WSN and UMTS with Video Quality Measurements and Predictions, Y. Du, F.P. Tso, and W. Jia A New Trust and Reputation-Based Chain Model in Peer-to-Peer Networks, S. Lee and W. Lee Bounding Data Aggregation for Ubiquitous Applications within Wireless Sensor Networks, S.J. Habib and M. Safar UBI-MEDIA MIDDLEWARE The Research of a Multiplayer Mobile Augmented Reality (MiMAR) System and Its Applications, J-Y Huang, M-C Tung, and C-H Tsai Finger Gesture Interaction on Large Tabletop for Sharing Digital Documents among Multiple Users, Y. Shi, C. Yu, and Y. Shi Integrating Spatial Audio, Visual, and Gestural Interfaces for Supporting Situated Collaborative Work, T. Nakaie, T. Koyama, and M. Hirakawa Pervasive Carpet Encoding for Active Knowledge Semantic Surfaces, K. Kanev and N. Mirenkov Minimizing the Stego-Image Quality Impact of Message Embedding Using the DM Allocation Method, C-C Chang, W-L Tai, and C-C Lin Indexing and Retrieval of Ubiquitous Visual Information, L. Ye, J. Ma, and R. Huang UBI-MEDIA APPLICATIONS A Peer-to-Peer Digital Human Life Memory Store for Sharing Serendipitous Moments, A. Ismail, M. Merabti, D. Llewellyn-Jones, and S. Sudirman Real-Time Recording and Updating of Personal Journeys via Ubiquitous Computing Technologies, H-B Chang, H-P Chang, H-H Hsu, L.R. Chao, and T.K. Shih Real-Time Vehicle Navigation Using Vehicular Ad Hoc Networks, J-W Ding, F-H Meng, and R. Y-M Huang Patient Safety Management: RFID Technology to Improve Emergency Room Medical Care Quality, C-C Chao and W-Y Jen Multi-Agent Architecture and Location-Based Ubiquitous Learning Framework, M. Chang, Q. Tan, F.O. Lin, and T-C Liu Toward a Personalized E-Learning Environment, E.W.C. Leung