An extensible and replaceable network-oriented component system provides a platform for developing networking navigation components that operate on a variety of hardware and software computer systems. By operation of the valves in the flush system, DFR particles can be removed from the DFR remover system in order to prevent or minimize particle clogging of a particle filter in the DFR remover system. The gate electrode is formed to overlap in plane with the channel region and the GOLD region. In some embodiments, the guide bushing can be formed from a first mixture comprising a thermoplastic polymer and a solid lubricant filler. The pore pressure, permeability and porosity of the formations is derived as a real time profile along the length of the borehole. At least one of the roller and the support include an abrasive surface for marring the substrate during such relative movement therebetween.