The invention authenticates processes and inter-process messaging. The material selected to form the second structural phase can be the same or different from that used to form the first structural phase. The gas discharge generates gas based electromagnetic waves. A drive mechanism drives the camshaft. When used with second stage beamforming system, three dimensional ultrasound images can be generated. The two or more nodes are associated with at least one message stream comprising a plurality of messages propagated through the associated nodes.