Implementations of a partitioned database system and a method of using a database system are disclosed. The method according to one embodiment includes receiving, by the UE, a physical downlink control channel via one or more resource units; receiving, by the UE, a physical downlink shared channel indicated by the received PDCCH; and transmitting, by the UE, a physical uplink control channel using a PUCCH resource in response to the received PDSCH. The set of search results is organized into a hierarchy of categories, the hierarchy including at least one category from the set of categories. The method also includes producing a second set of constellation symbols for transmission, where there is a difference of n bits between the bit size of the second bit sequence constellation symbol on each tone of the second set of tones and the bit-loading information associated with each tone of the first set of tones, and where n is an integer greater than or equal to 0. Each blade includes a trailing edge extending radially from the hub with each trailing edge being substantially straight and a tip is provided joining the trailing edges at approximately a 90\xb0 angle. The magnetic recording medium thus produced can be run stably.