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An Opportunistic Backoff Scheme for Dense IEEE 802.11 WLANs

In dense deployments, the performance of IEEE 802.11 Wireless Local Area Networks (WLANs) depends on the development of efficient contention resolution mechanisms since the collision probability can be high even with low number of users with the current 802.11 MAC mechanism. Also, the current 802.11 MAC is not opportunistic in the sense that it does not consider channel quality and traffic load of

Electricity Meters for Coordinated Voltage Control in Medium Voltage Networks with Wind Power

During the last years the amount of electricity generated by Distributed Energy Resources (DER), especially wind turbines, has been increasing a lot. These Distributed Generation (DG) units are often connected to rural distribution networks, where they have a large impact on the voltage and the network losses. The network voltage at the customers point of connection is an important quality criteri

Recombinant amelogenin - Strategies for purification and protein processing

Amelogenin is an extracellular matrix protein involved in formation of enamel during early tooth development. By interacting with the forming enamel crystallites amelogenin affects their growth, so that highly elongated hydroxyapatite crystals are formed. Early during the enamel formation amelogenin is proteolytically processed, which is essential for correct enamel formation. However, the exact m

Frustrated Mom Kills Dragon: Motherhood, Emotions and Computer Games

Today an increasingly large and diverse audience spends more and more time and money on computer games; the actual player can now be anyone. Gameplay, whether it is raiding online in World of Warcraft, an evening of Guitar Hero in the living room with friends, or a quick round of Sudoku Master on the Nintendo DS while commuting home from work, has become part of the everyday life of millions of pe