A crash brace is incorporated into a body structure of an automotive vehicle as an energy absorption and management device to assist in managing the energy during rear and side impact collisions, thereby protecting internal structures within the rear end of the vehicle. In one aspect, the invention is directed to control of parasitic mites of honey bees wherein the active ingredient is a miticidally effective amount of a selected ketone or 1-heptanol, ethyl butyrate, benzaldehyde, heptaldehyde, or d-limonene. First magnet and second magnet have pairs of magnetic poles, and disposed to ends of the first rotor and the second rotor respectively. A method of accumulating performance data from a read channel also is described. In addition, the method includes acquiring domain information for the managed domain from at least one domain-information source of the domain-information sources.