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Today's wireless networking technology provides high data rates. With IEEE 802.11n products, data rates beyond 500<sup>Mb</sup>/<inf>s</inf> are soon feasible for <i>Wireless Local Area Network (WLAN)</i>. Due to a standstill in standardization the project IEEE 802.15.3a it was disbanded in 2006. Companies are pushing therefore their own solutions to the(More)
Random-access networks may exhibit severe unfairness in throughput, in the sense that some nodes receive consistently higher throughput than others. Recent studies show that this unfairness is due to local differences in the neighborhood structure: nodes with fewer neighbors receive better access. We study the unfairness in saturated linear networks, and(More)
The aim of the Leiden Imaging and Multi-media Group in collaboration with Philips is to develop and evaluate content-based indexing and interactive retrieval methods for large photo collections and to integrate them with annotation based methods. Ground-truth is provided by copy pairs in the Leiden Portrait Database, a database of scanned-in images of(More)