The following articles have been accepted to the "Special Issue on Data Management for Mobile Services":

• Efficient Real-Time Trajectory Tracking
  Ralph Lange, Frank Dürr, Kurt Rothermel

• Direction-Based Surrounder Queries for Mobile Recommendations
  Xi Guo, Baihua Zheng, Yoshiharu Ishikawa, Yunjun Gao

• Sequenced Spatiotemporal Aggregation for Coarse Query Granularities
  Igor Timko, Michael Böhlen, Johann Gamper

• Indexing in-Network Trajectory Flows
  Iulian Sandu Popa, Karine Zeitouni, Vincent Oria, Dominique Barth, Sandrine Vial

• Unveiling the Complexity of Human Mobility by Querying and Mining Massive Trajectory Data
  Fosca Giannotti, Mirco Nanni, Dino Pedreschi, Fabio Pinelli, Chiara Renso, Salvatore Rinzivillo, Roberto Trasarti

• Ranking Continuous Nearest Neighbors for Uncertain Trajectories
  Goce Trajcevski, Roberto Tamassia, Isabel F. Cruz, Peter Scheuermann, David Hartglass, Christopher Zamierowski