An anti-reflux ureteral stent includes an elongated member with a distal end having a first retention structure and a proximal end having a second retention structure. Groups of time-series signals are generated based upon similarities between time-series signals. A media requester provides an event-definition record to a network entity so as to request a media file. A secondary pilot fuel circuit is formed within the nozzle body inboard of the air circuit and outboard of the primary pilot fuel circuit.