A magnetic head slider includes a near-field light generator, an incorporated heater is activated to thermally-expand the magnetic head slider so that a first protrusion is generated on the air bearing surface, and a second protrusion protruding from the first protrusion is generated by a thermal expansion of the near-field light generator. A single-member hunt group is initiated to provide an alias address which is associated with the partition of the computing environment. The centrifuge is driven by the turbine on a common shaft with the compressor and includes a centrifuge inlet, a gas outlet and an oil outlet. The central optical zone of the anterior surface has a larger diameter than the central optical zone of the posterior surface. With this structure, the electromagnetic waves easily enter the top surface of a surface course formed of the electromagnetic wave-absorbing pavement material. Particularly, eight reverse secondary power control subchannel bits areredefined to include DTX and EIB information for the various channels.