Abstract: A method and system for mitigating the impact of latency in the initiation of a packet-based real-time media session. When an initiating station is setting up a requested session, the initiating station will generate and play out a repetitive tone pattern (e.g., ring tone) for the initiating user to hear. The tone pattern is predefined in the initiating station, rather than being received from the network during session setup. The repetitive tone pattern preferably relaxes the initiating user and reduces or prevents “dead air” during session initiation.

Abstract: A system comprising a solid oxide fuel cell stack and a gas turbine engine. The stack comprises a plurality of solid oxide fuel cells, each fuel cell comprises an electrolyte, an anode and a cathode. The gas turbine engine comprises a compressor and a turbine with the compressor supplying oxidant to the cathodes. There are means to supply fuel to the anodes and to supply a portion of the unused oxidant from the solid oxide fuel cells to the cathodes. The means to supply a portion of the unused oxidant comprises a combustor and an ejector with the combustor burning a portion of the unused fuel from the solid oxide fuel cells in the portion of the unused oxidant from the fuel cells and is arranged to supply products of the combustor to the oxidant supplied by the compressor to the cathodes to preheat the oxidant supplied by the compressor.

Abstract: A location-code system provides user-specific location codes corresponding to locations. A user can provision the codes. When the user accesses a location-based service, the user can then provide the service with a location code. The service, perhaps with the assistance of a location-code provider, can then translate the user-specific location code into location coordinates that can be used to facilitate a location-based service. Further, the location-code system can provide global, or generic, location-codes for particular locations, which any user can use as a basis to indicate a location.

Abstract: A solid oxide fuel cell system (10) comprises a solid oxide fuel cell stack (12) and a gas turbine engine (14). The solid oxide fuel cell stack (12) comprises a plurality of solid oxide fuel cells (16), each solid oxide fuel cell (16) comprises an electrolyte (18) an anode (20) and a cathode (22). The gas turbine engine (14) comprises a compressor (60) and a turbine (62). The compressor (60) is arranged to supply oxidant to the cathodes (22). There are means to supply fuel (28, 30, 24) to the anodes (20). There are means to supply a portion of the unused oxidant (49) from the solid oxide fuel cells (16) to the cathodes (22).

Abstract: In order to evaluate the condensation amount in a jet engine intake duct, for calibrating the engine, apparatus are provided which induce a high speed flow of air through a duct. The duct is designed so that the air velocity within it very gradually increases along it until a choked (sonic) condition is reached. At or around sonic conditions static pressure is very responsive to changes in flow due to condensation. Thus by first obtaining a pressure profile along the duct under non-condensing conditions and then comparing this with a pressure profile under condensing conditions a condensation amount can be computed.

Abstract: A low drag surface comprises at its upstream edge an intermittent linear vortex producing means extending transverse to the flow of fluid across the surface. The vortex producing means produces a succession of rolling vortices which roll across the surface reducing the drag between the main flow and the surface.