An electronic converter receiving low frequency input power, converting this power to DC power at a voltage greater than the input voltage peak, and providing output power from a commutator stage. , and the sintered agglomerates having a loose packing density of \u22661. , urine, to indicate the presence of specified chemical components in the specimen. The method may further include performing a search of a database for information associated with the object, and receiving results of the search. The frequency representation provides an ordered corpus of the frequencies of occurrence of each concept.