A single phase AC generator uses a rotor contained within a stator. Upon receiving a query to the operational datastore, it is determined whether data relevant to the query is present in the staging area datastore. The housing includes a latch beam that is deflectable between a latched state and an unlatched state. At least one elongate element is adjustably connected to the plurality of elongate fingers and forms part of a circumference of the adjustable socket system. The invention includes a method of writing the servo tracks of a rotating disk surface by writing the servo tracks from the Outside Position to essentially the Middle Position and by writing the servo tracks from the Inside Position to essentially the Middle Position. Those which are printed in a superimposed manner on the effect panel 813 are: the first picture 813a that is printed in an ordinary manner with the use of color ink ; and the second picture 813b that is printed with a polarizing pearl ink with its higher light transmission property than that of color ink.