Transmit coil arrays allowing independent control of individual coil drives facilitate adjustment of the B(1) field distribution, but when the B(1) field distribution is changed the electric field and SAR distributions are also altered. This makes safety evaluation of the transmit array a challenging problem because there are potentially an infinite number of possible field distributions in the...

Considering a plasma with an initially weak large scale field subject to nonhelical turbulent stirring, Zeldovich (1957), for two-dimensions, followed by others for three dimensions, have presented formulae of the form 〈b〉 = f(RM )B 2 . Such “Zeldovich relations” have sometimes been interpreted to provide steady-state relations between the energy associated with the fluctuating magnetic field a...

A bstract We study gauge theories of background fields associated to BRST quantized spinning particle models and identify background-independent algebraic structures which allow systematically reduce the spectrum subject some them dynamical equations motion. More specifically, we construct a manifestly extension model based on N = 2 particle. The resulting system describes an on-shell spin-1 fi...