| March 2005 | Vol. 28 No. 1 |
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Letters |
| Letter from the Editor-in-Chief | David Lomet | 1 |
| Letter from the Special Issue Editor | Minos Garofalakis | 2 |
Special Issue on In-Network Query Processing |
| The Network Oracle |
| Joseph M. Hellerstein, Vern Paxson, Larry Peterson, Timothy Roscoe, Scott Shenker, David Wetherall | 3 |
| Efficient Monitoring and Querying of Distributed, Dynamic Data via Approximate Replication |
| Christopher Olston, Jennifer Widom | 11 |
| Data Reduction Techniques in Sensor Networks | Antonios Deligiannakis, Yannis Kotidis | 19 |
| Robust Aggregation in Sensor Networks |
| George Kollios, John Byers, Jeffrey Considine, Marios Hadjieleftheriou, Feifei Li | 26 |
| Efficient Strategies for Continuous Distributed Tracking Tasks | Graham Cormode, Minos Garofalakis | 33 |
| Resource-Aware Wireless Sensor-Actuator Networks | Amol Deshpande, Carlos Guestrin, Samuel R. Madden | 40 |
| Efficient Queries in Peer-to-Peer Systems | Prasanna Ganesan, Hector Garcia-Molina | 48 |
| Structured Peer-to-Peer Networks: Faster, Closer, Smarter |
| P. Felber, K.W. Ross, E.W. Biersack, L. Garcés-Erice, G. Urvoy-Keller | 55 |
| Network Awareness in Internet-Scale Stream Processing |
| Yanif Ahmad, Ugur Çetintemel, John Jannotti, Alexander Zgolinski, Stan Zdonik | 63 |
| Implementing a Sensor Database System using a Generic Data Dissemination Mechanism |
| Omprakash Gnawali, Ramesh Govindan, John Heidemann | 70 |
Announcements and Notices |
| ICDE'05 Data Engineering Conference Conference | backcover |