An apparatus, system, and method efficiently manage reverse link communication in a communication system having geographically distributed base stations. Tissue mobility is then determined by a ratio of the tissue velocity to the applied force. Systems for fuel preparation are also provided. The polypeptides can also used to provide a therapeutic treatment for diseases of or related to glucose metabolism and adipose tissues. The offset-agitator can be moved in and out of the flexible tube, through the open distal end, to adjust its effective diameter.