... 2000.T. Imielinski, S. Viswanathan, and B. Badrinath. Energy efficient indexing on air. In SIGMOD, 1994.J.Kucera and U. Lott. Single chip 1.9 ghz transceiver frontend mmic including Rx/Tx localoscillators ... approaches in query processing formoving object trajectories. In VLDB, 2000.S. Prabhakar, Y. Xia, D. V. Kalashnikov, W. G. Aref, and S. E. Hambrusch. Query indexingand velocity constrained indexing: ... produce clusterings of high quality the DCF tree is compactenough to fit in main memory. Hence, there is no I/O cost involved in this phase, since itinvolves only the clustering of the leaf...