Abstract: A gas turbine engine includes a fan and an engine core that includes a compressor, a combustor, and a turbine. The fan and the compressor include variable pitch geometry. The gas turbine engine further includes a control system configured to adjust the variable pitch geometry of the fan and the compressor to optimize a performance characteristic of the gas turbine engine.

Abstract: System and methods are provided that use a recharge device to resupply a reservoir and tank with fluids used to power a turbine, which in turn powers a generator, wherein one of the resupplied fluids is used to cool a load that is powered by the generator.

Abstract: A start system for an expendable gas turbine engine is provided. The start system may include: a tank configured to store a pressurized gas comprising oxygen; a non-pyrotechnic igniter in communication with a combustion chamber of the expendable gas turbine engine; a starter tube configured to feed the pressurized gas from the tank into the combustion chamber; and a valve configured to regulate a flow of the pressurized gas from the tank into the starter tube; wherein, the start system is configured to startup the expendable gas turbine engine by the flow of the pressurized gas from the tank, through the valve and the starter tube, into the combustion chamber and, from the combustion chamber, into a plurality of turbine blades of the expendable gas turbine engine, and by ignition, by the non-pyrotechnic igniter, of fuel injected into the combustion chamber.

Abstract: Systems and methods are provided that use compressed gas to power a turbine, which in turn powers a generator, where an expansion of the compressed gas provides cooling for an electrical load that is powered by the generator.

Abstract: A container may be supplied with an incompressible fluid. For example, the container may be partially or completely prefilled with the incompressible fluid. The container may be supplied with a flow of compressible gas via a first valve. The first valve may regulate the flow of the compressible gas supplied to the container based on a pressure setting of the first valve. A second valve may release the incompressible fluid from the container as the container is filled with the compressible gas and in response to a pressure of the container being greater than a pressure setting of the second valve. The pressure setting of the first valve may be greater than the pressure setting of the second valve.

Abstract: Systems and methods of augmenting the thrust of the prime power engine(s) of an aircraft from a tank of compressed gas are described herein.

Abstract: A method includes receiving, at a first device, an option to receive a video identified by a second device, the option received during a communication session between the first device and the second device. The method includes receiving, at the first device, input indicating acceptance of the offer. The method includes, in response to the input, automatically making a determination, at the first device, whether to have the video sent to a video output device that is distinct from the first device, to receive the video at the first device, or both. The determination is based on a location of the first device. The method also includes, in response to the determination indicating to have the video sent to the video output device, sending a notification to the application server. The notification identifies the video output device.

Abstract: Systems and methods are provided that use compressed gas from a tank in an aircraft to avoid and/or recover from a compressor surge. Systems and methods are provided that use compressed gas from a tank to startup a gas turbine engine in an aircraft, where the gas turbine engine is configured as a prime power engine for the aircraft.

Abstract: A gas turbine engine includes a fan and an engine core that includes a compressor, a combustor, and a turbine. The fan and the compressor include variable pitch geometry. The gas turbine engine further includes a control system configured to adjust the variable pitch geometry of the fan and the compressor to optimize a performance characteristic of the gas turbine engine.

Abstract: Systems and methods are provided that use compressed gas to power a turbine, which in turn powers a generator, where an expansion of the compressed gas provides cooling for an electrical load that is powered by the generator.

Abstract: A container may be supplied with an incompressible fluid. For example, the container may be partially or completely prefilled with the incompressible fluid. The container may be supplied with a flow of compressible gas via a first valve. The first valve may regulate the flow of the compressible gas supplied to the container based on a pressure setting of the first valve. A second valve may release the incompressible fluid from the container as the container is filled with the compressible gas and in response to a pressure of the container being greater than a pressure setting of the second valve. The pressure setting of the first valve may be greater than the pressure setting of the second valve.

Abstract: Systems and methods of augmenting the thrust of the prime power engine(s) of an aircraft from a tank of compressed gas are described herein.

Abstract: A method includes receiving, at a first device, an option to receive a video identified by a second device, the option received during a communication session between the first device and the second device. The method includes receiving, at the first device, input indicating acceptance of the offer. The method includes, in response to the input, automatically making a determination, at the first device, whether to have the video sent to a video output device that is distinct from the first device, to receive the video at the first device, or both. The determination is based on a location of the first device. The method also includes, in response to the determination indicating to have the video sent to the video output device, sending a notification to the application server. The notification identifies the video output device.

Abstract: Methods and devices for providing presence based messaging are disclosed. For example, a method receives a message including a message content, an identifier of a recipient and a presence parameter. The presence parameter may comprise a speed parameter pertaining to a speed of a device associated with the recipient or a mood parameter pertaining to a mood of the recipient. The method then stores the message and delivers the message to the device associated with the recipient when the presence parameter is satisfied.

Abstract: Devices, systems, and methods are disclosed for sharing video between devices during a voice call. A sending party and a receiving party can view a video during the voice call, enabling a live discussion of the video. During a connected voice call, a first mobile device signals to an application server the desire to share a video with a second mobile device. The application server appropriately instructs a media server to obtain the video and transcode the video for delivery to the second mobile device, the first mobile device, and/or an external display device. The video may be streamed to the media server from the first mobile device or the media server may otherwise locate the video from within the network. The media server streams the video to the second mobile device, the first mobile device, and/or the external display device.

Abstract: Methods and devices for providing presence based messaging are disclosed. For example, a method receives a message including a message content, an identifier of a recipient and a presence parameter. The presence parameter may comprise a speed parameter pertaining to a speed of a device associated with the recipient or a mood parameter pertaining to a mood of the recipient. The method then stores the message and delivers the message to the device associated with the recipient when the presence parameter is satisfied.

Abstract: A communication method for transferring communication data between a plurality of participants is provided. The participants include at least one active participant that generates the communication data and at least one passive participant that does not generate the communication data. The communication method includes receiving, by a primary server, the communication data generated by the active participant and transmitting, by the primary server, the communication data received from the active participant to at least one secondary server that does not receive any communication data from any of the active participant and the at least one passive participant. The secondary server receives the communication data transmitted from the primary server and transmits the received communication data to the passive participant.

Abstract: Concepts and technologies are disclosed herein for detecting presence using a presence sensor network. In some embodiments, a computer executing a presence service generates a user interface for display at a user device. The user interface can include a control that, when selected, generates room data defining a monitored location. The computer can obtain sensor identifier data that identifies a presence sensor located at the monitored location and a location of the presence sensor at the monitored location. The computer can provide the user interface to the user device to obtain the room data and obtain the room data. The computer also can store the room data and the sensor identifier data.

Abstract: Methods and devices for providing presence based messaging are disclosed. For example, a method receives a message including a message content, an identifier of a recipient and a presence parameter. The presence parameter may comprise a speed parameter pertaining to a speed of a device associated with the recipient or a mood parameter pertaining to a mood of the recipient. The method then stores the message and delivers the message to the device associated with the recipient when the presence parameter is satisfied.

Abstract: Concepts and technologies are disclosed herein for detecting presence using a presence sensor network. In some embodiments, a computer executing a presence service generates a user interface for display at a user device. The user interface can include a control that, when selected, generates room data defining a monitored location. The computer can obtain sensor identifier data that identifies a presence sensor located at the monitored location and a location of the presence sensor at the monitored location. The computer can provide the user interface to the user device to obtain the room data and obtain the room data. The computer also can store the room data and the sensor identifier data.