Techniques and systems for distracting a spinal disc space and supporting adjacent vertebrae are provided. In a first solution, active phases, related to a side, represent a quantity, which corresponds to the time, to the path or to the angle of the active phases traversed. The first operating system consumes less power than the second operating system. The cavity is filled with a flexible and resilient material to accommodate flexing of the rearward portion relative to the forward portion. An adaptive architecture is used to recognize and adapt the shape and color features for moving objects to enable object recognition. The converter may include a slip responsive arrangement for retarding actuation of the peripheral magnets to thereby delay movement when there is a slip between respective speeds of the input and output members.