= Alain Noullez
{c}
<Alain Noullez> is a physicist whose documented work combines fluid and <magnetohydrodynamic turbulence>, <statistical physics> and numerical methods. His historical CV in an ISSI team proposal records research at the Observatoire de la Côte d'Azur, together with interests in <statistics>, <signal processing> and <numerical analysis>.<Dispersive cascade and dissipation in collisionless space plasma turbulence: observations and simulations>[PDF page18, Alain Noullez CV, Research section]{ref}
He coauthored the 2007 <Ulysses spacecraft> study of an <energy cascade> in the <solar wind>. The investigators formed mixed third-order <structure function (turbulence)> statistics from <Elsässer variables>, which combine <velocity> and <magnetic field> fluctuations. A roughly linear dependence on separation supplied evidence of transfer across scales. The analysis used high-speed polar-wind observations and explicitly related a time lag to a spatial separation through the assumption that the flow carries structures past the spacecraft.<Observation of inertial energy cascade in interplanetary space plasma by Luca Sorriso-Valvo and others>[byline; equations3 and analysis of the first seven months of1996]{ref}
This makes a useful distinction between an instrument's output and a physical conclusion. A spacecraft samples a time series at one moving location; interpreting the separation dependence requires a stated mapping from observation time to spatial structure. The statistical method and the physical assumption are both part of the result.
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