Provided is an electric mascara capable of not only preventing eyelash from being pulled out when it is made up by improving a brush but also enabling to comb up eyelash in order without deformation. Power line information is determined by receiving a signal from a first device, determining a power line transfer function based on the received signal, and determining power line information based on the determined power line transfer function. The method also includes setting a second field to indicate that the entry in the first TLB matches a corresponding entry in a second TLB. The ability to adjust the prefetch rate of a prefetch unit advantageously decreases the number of memory transactions, thereby decreasing the power consumption of a processing unit.