Characterization of reproductive and cytological features of midday flowers (Aizoaceae) for breeding purposes

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Economic and financial crises can change the dynamics of federal relationships

Economic recession and soaring deficits in the wake of the recent fiscal and economic crisis do not only ask for intelligent fiscal policies but need also coordinated efforts in federal states in order to forego contradictory and inefficient fiscal reactions to the crisis. Dietmar Braun and Philipp Trein have investigated eleven federations to discover what extent the crisis has contributed to such confrontation and changes in federal relations

Evaluation of WiseMAC and extensions onwireless sensornodes

In the past five years, many energy-efficient medium access protocols for all kinds of wireless networks (WSNs) have been proposed. Some recently developed protocols focus on sensor networks with low traffic requirements are based on so-called preamble sampling or low-power listening. The WiseMAC protocol is one of the first of this kind and still is one of the most energy-efficient MAC protocols for WSNs with low or varying traffic requirements. However, the high energy-efficiency of WiseMAC has shown to come at the cost of a very limited maximum throughput. In this paper, we evaluate the properties and characteristics of a WiseMAC implementation in simulation and on real sensor hardware. We investigate on the energy-consumption of the prototype using state-of-the-art evaluation methodologies. We further propose and examine an enhancement of the protocol designed to improve the traffic-adaptivity of WiseMAC. By conducting both simulation and real-world experiments, we show that the WiseMAC extension achieves a higher maximum throughput at a slightly increased energy cost both in simulation and real-world experiment