Systems and methods are disclosed for retrieving on-line information by receiving a request for a document from an information system; parsing the request for a source identifier; searching for documents in a local search system in response to the parsed request; and providing one or more responsive documents to the request. The device includes at least one collapsible blade member and a rotary mover for rotating the blade member to provide hemodynamic circulation. The coating may be hardened by curing with ultraviolet radiation or solvent evaporation and crosslinking.