Various \u201ccontactless\u201d bearing mechanisms including hydrodynamic, hydrostatic, and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. The user selection can represents a request to open the Web page within an instantiated one of a set of Web browser applications installed on a computing device. In some operations, software creates, updates, or otherwise processes information related to a document output request business object. If a data block is found that corresponds to a hash value for a corrupted or lost data block, the data storage service uses that data block to repair the corrupted or lost data block. A determination is then made as to when the initiated transaction has been completed by transfer of the processed data to the second location on the network from the last of the intermediate nodes in the network that has operated on the data. Other medical devices, such as an atherectomy catheter, can be inserted distal the occluder to provide therapeutic intervention.