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Data from the advanced very-high-resolution radiometer sensor on the National Oceanic and Atmospheric Administration's operational series of meteorological satellites were used to classify land cover and monitor vegetation dynamics for Africa over a 19-month period. There was a correspondence between seasonal variations in the density and extent of(More)
(NIST) promotes the U.S. economy and public welfare by providing technical leadership for the nation's measurement and standards infrastructure. ITL develops tests, test methods, reference data, proof of concept implementations, and technical analysis to advance the development and productive use of information technology. ITL's responsibilities include the(More)
In mobile ad hoc networks, the topology of the network is constantly changing as nodes move in and out of each other's range, breaking and establishing links. TCP performs poorly in such networks because packets that are lost due to path disconnections trigger TCP's congestion avoidance mechanisms. We investigate the effect of preemptive routing protocols,(More)
This paper describes a field demonstration and presents the network performance of an 802.11 ground-UAV network composed of 11 ground stations, a mobile vehicle and two fixed wing UAVs, connected by two routing gateways to a legacy wired network. The network effects demonstrated include mobility, network partitions, network merges and gateway failovers. The(More)
OBJECTIVES To audit indications for and practice (in terms of training/qualification) of definitive airway management compared with current UK practices. DESIGN Consecutive observational study. SETTING Tygerberg Academic Hospital Trauma Service, Western Cape. SUBJECTS All trauma patients either arriving intubated or requiring intubation at the Trauma(More)
A key step in the evaluation of an agent (either autonomous or human) is determining the agent's success as compared to other agents designed to participate in the same environment. Such comparisons are the basis for the Trading Agent Competition (TAC), in which autonomous trading agents compete in simulated market scenarios. TAC servers and agents alike(More)
L-Aspartic acid (L-Asp) is one of the fastest racemizing amino acids such that the abnormal D-form (D-Asp) has been found in stable biological human tissues such as dentin in teeth, eye lens and brain. Earlier reports showed that there was a linear correlation between age and D-Asp in teeth. We have previously reported that significant levels of D-Asp were(More)
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