A method for generating and identifying an identifier and a communication system are provided. The synchronized movement of the static focal spot, x-ray tube and collimator blades helps keep the effective focal spot fixed in space relative to the breast, detector or both during the entire duration of the exposure and keeps the x-ray field on the detector and breast static. The conductive contact unit also includes a conductive contact holder including first guiding grooves and second guiding grooves facing the first guiding grooves. Further, none of the dimensions correlates to a side by side ordering of the consumer products. More particularly, the invention provides bisarylamines, compositions and methods that are useful in the treatment of central or peripheral nervous system disorders and as neuroprotective agents by opening potassium channels associated with the onset or recurrence of the indicated conditions. Then, for the quantity of most significant bits determined to have the most overall memory usage savings, the quantity of most significant bits may be removed from each key in the plurality of key value pairs.