A system and method can implement highly available Internet Protocol based communication across multiple independent communication paths. A shrouded fan assembly is coupled to the shaft so as to generate an air flow when the shaft rotates. Resistance to this class of antibiotics is frequently developed by microbial enzymatic acetylation, phosphorylation or ribosylation of aminoglycosides, modifications that weaken their interactions with the target RNA. An indexing ring is radially fixed relative to the piston.