A method of manufacturing a bipolar junction transistor results in an integrated polysilicon base contact and field plate element minimally spaced from a polysilicon emitter contact by using a single mask to define respective openings for these elements. Prefetching data comprises, receiving, in response to a first memory request by a first node, presence data for a memory region associated with the first memory request from a second node that sources data requested by the first memory request, and selectively prefetching at least one cache line from the memory region based on the received presence data. The bearing housing can have an annular channel and the compression staking can be done to an outer edge of the annular channel to form one or more compression projections. The compensation device is used for generating a compensated motor control output according to the motor control output and a second signal. It is determined using the first cost metric and the second cost metric whether to move the at least one portion of data.