A method and article for efficiently accessing resources in a multiprocessor computer system. The sheath has a hollow generally tubular body slidably received on the tube. The energy absorber includes a body having a first side and an opposing second side, a plurality of crush lobes extending from the first side, and a plurality of vertical translational crush lobes extending from the second side. Further, the select gate voltage can be stepped up with the erase voltage to avoid an excessive drain-to-gate voltage across the select gates which causes degradation. A second time offset between the first communications device at the remote user and a second communications device at the differential reference station is determined.