Abstract: An example system includes a first memory that includes primary storage; a second memory that includes secondary storage; and a control system for predicting paths through a test program that will be taken during a planned execution of the test program, and for causing test data associated with the test program to be stored in the first memory or the second memory based on the paths predicted.

Abstract: For NMR purposes a uniform magnetic field has been produced by field coils. It is known to use a cosinusoidal distribution to produce a uniform field. However, a large-diameter low-inductance coil is required for NMR and it is difficult to wind a small number of turns cosinusoidally. It is proposed to use two cosinusoidal coils providing unequal and opposing fields, the required field being the resultant and the combined inductance being less than either coil individually. The coils may have different winding densities or may be at different radii or both.