A method and apparatus for peer-to-peer file sharing is provided. The system preferably includes an enclosed chamber, an adherent generator, and at least one high-energy source. The microcontroller also has a control circuit that, by storing the next few program instructions internally before placing the memory in standby, or by delaying the interrupt signal, provides extra time for memory operation to stabilize on exit from the standby mode. Plural oil trap members for trapping oil mist in the blow-by gas are arranged in the breather chamber. It makes possible to assemble a pin assembly easier and to elongate a service life of the track bogie. A first entity of the set of entities determines the subset of resources andor rights owned by the first entity that another entity may use, exercise or view details of, as appropriate, based on the minimum number of associations that exist between the first entity and the other entity.