The Direct Drive System provides power from the differential motion
between the buoy float and a submerged resistant plate.
This differential motion
of the mantle relative to the core stirred the liquid core, creating fluid motions that, in theory, could give rise to a magnetic dynamo.
Where piping attaches to equipment, flexible connections will accept the differential motion
between piping attached to the ceiling and equipment attached to the floor.
This velocity field describes the differential motion
of 3-space, and the various equations of physics must be generalised to incorporate this 3-space dynamics.
manufacturers, including General Motors, Ford Motor Co., and Chrysler Corp., rationalized that frontseat back collapse in rear-end crash tests did not produce any significant differential motion
between the dummy's head and neck, and therefore posed less risk of connective-tissue injury.