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Recent theoretical research has shown that ocean currents and wind interact to disperse seeds over long distances among isolated landmasses. Dispersal of seeds among isolated oceanic islands, by birds, oceans and man, is a well-known phenomenon, and many widespread island plants have traits that facilitate this process. Crucially, however, there have been no mechanistic vector-based models of long-distance...
Potential-induced degradation in conventional p-type silicon-based photovoltaic solar cell modules is described as a failure mechanism involving positive ion migration, understood to be primarily Na+, drifting from the glass to the cells in negative-voltage arrays. Acceleration factors for this mechanism are determined for silicon photovoltaic modules by comparing the module power during degradation...
A Thomson scattering diagnostic has been developed to probe plasmas produced using the MAGPIE generator (1.4MA, 240ns). The diagnostic uses a frequency doubled Nd:YAG laser delivering ∼2–4J in 8ns FWHM to the target plasma. The density and temperature of the wire array targets probed produces scattered light in the collective regime (α>1). Any bulk motion of the probed plasma Doppler shifts the...
QinetiQ North America Technology Solutions Group's (QNA) has developed a Lagrangian Riverine Drifter for remote, autonomous collection and transmission of real-time surface velocities and water depth. A discussion of the design and results achieved during deployment of the QNA Riverine Drifter in are provided. Testing was conducted by QNA, the Naval Postgraduate School (NPS) and the University of...
The real-time remote measurement of riverine conditions including depth, temperature, and current speed as a function of position will provide valuable information to support river modeling and monitoring of a river's change conditions. QinetiQ North America (QNA), formerly Planning Systems Incorporated, has designed and tested a Riverine Drifter to collect and provide river parameters without extensive...
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