An electrochemical compression system utilizes an electrolyzer to electrolyze an electrochemically active working fluid, at a first pressure, into decomposition products that are reformed back into said electrochemically active working fluid by a fuel cell, at a higher pressure. The media unit may be secured to a rotating frame. The clustering unit 29 detects a cluster to which a new unregistered word is to be added as a new member, from existing clusters obtained by clustering unregistered words. In other embodiments, the method identifies a route for the net based on different congestion goals between different layer pairs. The assembly also includes a a second sub-assembly having an ink supply to receive ink from the primary container through a conduit and to deliver ink to a printhead. One end of a foot support member has a pedal which follows elliptical motion while the other end is guided by a drive link to drive an alternator and flywheel.