Abstract: Mean and variance of horizontal wind direction are defined in a minimal variance sense. Starting from a theoretical model, termed anisotropic Gaussian model, of the probability density functions of the Cartesian wind ...

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Abstract: Digital hydraulics uses simple and cheap on/off valves in order to replace expensive proportional valves. Furthermore, with fast switching hydraulic converters the energy efficiency can be raised compared to proportional ...

Abstract: Stiction forces exerted by a fluid in a thin, quickly widening gap to its boundaries can become a strongly limiting factor of the performance of technical devices, like compressor valves or hydraulic on–off valves. In ...

Abstract: The remote, diverless, simultaneous connection of multiple subsea flowlines has historically been a difficult and costly operation. Difficulties and intensified operational activities stem from the ...

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Abstract: The ratios of the concentrations of SO2 and of water vapor in precipitation to those in air on a mass basis are in the range 19 to 500. For particulates, the ratio usually falls in the range 290 to 2700. The ratio varies ...