An antenna includes a metal member, an antenna, and a capacitor. Also disclosed are methods for treating cancer and identifying compounds that modulate SIM2 expression. A translator component translates the first playlist into a canonical data format, forming a second playlist in the canonical format. By adjusting one or more operating parameters of each power amplifier according to changing requirements, the efficiency of each power amplifier can be optimized. The collector unit transmits the digital data from the hub unit to the distributor computer unit, which processes the digital data to assess the performance parameters of the apparatus. In the mobile communication system, a base station or a radio network control apparatus sets a threshold of signal energy to noise power density ratio of a common pilot signal according to downlink total sending power, which may change every moment, and sends the threshold to the mobile station 110.