Abstract: An entertainment system includes a video display unit facing a passenger seat and a track pad assembly integrated with an armrest of the passenger seat. The track pad assembly includes a track pad that is operable to control the video display unit.

Abstract: A cooler operating on the Stirling cycle, of the type including a compressor with a compression piston moving in a compression cylinder, a regenerator with a regeneration piston moving in a regeneration cylinder, a driving crankshaft including a crank pin that can rotate with respect to the compression cylinder and/or the regeneration cylinder, and a compression connecting rod, including a head mounted on the front pin and a foot articulated on the compression piston, the regeneration piston being connected to the crankshaft by a link element including at least three rigid adjacent sections connected by at least two spring-type connecting rods.

Abstract: Methods and devices use information from the original SAR images to provide measurements that can be applied to corresponding change detection products. This produces reliable registration and alignment for the change products even when the imaging geometry is significantly changed.

Abstract: A method for synchronizing the transmission of messages in a communication system comprises a user terminal, a main communication network comprising a first station, and a secondary communication network comprising a second station, the method consisting of an exchange of synchronization signals to calculate an offset to be applied to the instant of emission of the messages transmitted by the second station so that the messages transmitted by the first station and the second station are received by the user terminal in a synchronous manner. A communication system implementing the invention is provided.

Abstract: In a liquid crystal or OLED active-matrix screen, the power supply voltages VGON and VGOFF of the display control circuit driving the control transistors of the pixels are optimized, as a function of a measurement of the operating temperature, to conserve the display qualities of the screen at high and low temperatures and reduce the power consumed on average to produce screens for applications in a severe environment, with transistors of standard size. Circuits are provided for supplying these analog voltages from numeric values supplied by a code associated with the temperature measurement, stored or computed by a programmable circuit. Provision is made to adapt these voltages as a function of a measurement of lighting level received by the transistors of the display control circuit. The optimization extends to the power supply and reference voltages necessary to the control of the pixels, notably to the gamma reference voltages.

Abstract: A method for formulating a knowledge database of object images acquired by an imaging device furnished with a sensor, including defining N classes each including a set of objects represented by a label and a set of characteristics, learning decision rules associated with these classes, definition of K contextual information cues regarding image background fk, with k varying from 1 to K and K>1, association of one of these information cues regarding image background fk with each object, allotting of the objects into M new classes, with N<M?K×N, each including a set of objects represented by a new label including an old label and one of said information cues regarding image background fk and the set of characteristics of these objects, definition for each background fk of a subset Qk of these M classes associated with this image background, learning of decision rules for each of these subsets Qk.

Abstract: The general field of the invention is that of electronic mission preparation systems, notably for aircraft pilots. The system comprises a removable touch tablet and an associated connection support or docking station intended to be mounted on an aircraft instrument panel. The connection support comprises a mechanical support comprising translational guiding means and a pivoting pallet comprising mechanical means for rapidly locking and unlocking the touch tablet This connection support also comprises a memory card and electrical connectors. These provisions together ensure both the electrical and mechanical connections of the tablet to the avionics system via the connection support.

Abstract: A thrust nozzle system is provided for a satellite designed to be stabilized in autorotation over a geostationary orbit, the satellite comprising three reference axes X, Y and Z, the Y axis representing the North/South axis and the Z axis corresponding to an Earth pointing direction. The thrust nozzle system comprises a first set of thrust nozzles configured for maintaining the satellite in station, the first set comprising an even number of thrust nozzles using electrical propulsion, with a pre-adjusted orientation, the even number being equal to at least 4, the thrust nozzles being oriented along three spatial components, and having, taken in pairs, different signs of X and Y components.

Abstract: A method for sharing spectrum in a communication network, comprising at least two systems working in frequency ranges that can overlap at least partially and in one and the same geographic area, comprises at least the following steps: affiliating the first and second systems with a server; determining whether there is a constrained system and, if there is, assigning said constrained system a first spectral band, for a given geographic area; performing this assignment for all the geographic areas covered by the two systems; and identifying the non-constrained systems and, by applying sub-band priority and management rules, assigning, for each of the non-constrained systems and each defined geographic area, a spectral band for each of the systems, and in the case where it is impossible to find a spectral sub-band, generating an alarm.

Abstract: A SAR imaging method performs N SAR acquisitions in stripmap mode of the earth's surface using a synthetic aperture radar transported by an aerial or satellite platform and including a single, non-partitioned antenna and a single receiver coupled thereto. All N SAR acquisitions are performed using the same predetermined elevation angle relative to the nadir of the synthetic aperture radar and using a respective squint angle relative to the flight direction of the synthetic aperture radar. Radar transmission and reception operations are time interleaved with other N-1 SAR acquisitions, resulting in the respective acquisition directions being parallel to each other and not parallel to acquisition directions of other N-1 SAR acquisitions. Radar beams in two immediately successive time instants and related to two different SAR acquisitions are contiguous along the azimuth. SAR images may be generated using all the N SAR acquisitions having an enhanced azimuth resolution.

Abstract: A SAR imaging method is provided that performs N SAR acquisitions in stripmap mode of areas of the earth's surface by means of a synthetic aperture radar transported by an aerial or satellite platform and which includes a single, non-partitioned antenna and a single receiver coupled to the single, non-partitioned antenna, N being an integer greater than one. Each SAR acquisition in stripmap mode is performed using a respective squint angle with respect to the flight direction of the synthetic aperture radar and a respective elevation angle with respect to the nadir of the synthetic aperture radar. The method may further generate SAR images of areas of the respective swath observed via the SAR acquisition in stripmap mode. All SAR images have the same azimuth resolution that is equal to half the physical or equivalent length along the azimuth direction of the single, non-partitioned antenna of the synthetic aperture radar.

Abstract: The invention relates to a process for fabricating a microcell for a caesium atomic micro-clock having an inversion temperature above 80° C., comprising a step of generating a caesium vapor by heating a caesium-containing pellet, the buffer gas used containing neon and helium.

Abstract: A method and device are provided suited to estimating a frequency value for aeronautical communication between a first station and an airborne system moving in relation to the first station, the data being transmitted in the form of a succession of frames, a frame comprising at least one first header field of known data followed by one or more fields of unknown data, and having at least the following steps: Step 1: performance of a supervised correlation on the known data (300) of the header, and estimation of a first frequency range centered on a frequency ; Step 2: production of a blind correlation on at least all of the unknown data of a field of data, by looking for a correlation peak over the frequency range +/?, as determined in step 1, and by retaining of the frequency corresponding to the correlation peak.

Abstract: A system and method for transmitting a data stream between a server and a user terminal, comprises at least one satellite gateway associated with a satellite router communicating with at least one satellite terminal associated with a terminal router, wherein the terminal router is configured, when it receives a stream request from a user terminal, to search for it in its memory resources and, if appropriate, transmit it to the user terminal, the satellite router is configured to transmit the request to the server, estimate a popularity of the stream and transmit a message of correspondence between the stream and broadcasting parameters then convert the stream into a point-to-multipoint stream adapted to the broadcasting parameters, the terminal router is configured to convert point-to-multipoint streams into point-to-point streams and transmit them to the user terminals.

Abstract: A functional node for an information transmission network and corresponding network are disclosed. In one aspect, the functional node includes at least one module for distributing messages between input and output ports. The distribution module includes at least one combination of at least three ports, including a first input port connected to a second output port by a first capability for unconditionally propagating messages, not depending on the messages. The first and/or second ports are connected to a third port by a second capability for conditionally propagating messages, depending on the messages.

Abstract: The present invention concerns a method for making a microsatellite, comprising providing: modules of a first type configured to house electronic boards of a microsatellite; modules of a second type configured to house devices and systems of a microsatellite; and modules of a third type comprising first and second interface means configured to be coupled to a launch vehicle and to external appendages of a microsatellite, respectively; said modules of a third type being designed to cause a body of a microsatellite to have a predefined height; wherein all the modules of the first, second and third types are configured to be stacked regardless of the type. The method further comprises making a body of a microsatellite by stacking modules of different types, wherein the stacked modules include at least one module of the second type and at least one module of the third type.

Abstract: A method of computing an aircraft trajectory, between a departure point and an arrival point, comprises: loading the departure point and a departure angle; determining two waypoints; loading the arrival point and an arrival angle; determining two departure circles of respectively left and right type, which are tangent to the oriented departure straight line respectively on the left and on the right, and passing respectively through the waypoint of left type and through waypoint of right type; determining two arrival circles of respectively left and right type which are tangent to the oriented arrival straight line respectively on its left and on its right and passing through the arrival point; determining a plurality of continuous geometric lateral trajectories comprising an initial portion comprising a portion of a departure circle, a final portion equal to a portion of an arrival circle, and an intermediate portion.

Abstract: A radiating element is provided, for example for array antenna, having stacked resonant cavities of Pérot-Fabry type, of compact structure, a lower cavity being fed by excitation means, the radiating element being characterized in that corrugations are formed substantially below a first earth plane delimiting in its lower part the upper resonant cavity. A radiating element structure of improved compactness is also proposed, whose upper cavity is surmounted by a polarizing radome.

Abstract: A monolithic mechanical-thermal structure which is suitable for a space environment is provided, in which the structure contains at least one hole. The walls of the hole are lined with filaments. The monolithic mechanical-thermal structure may be made of metal. And a process for manufacturing the structure is also provided.

Abstract: A method of controlling congestion in a communications network comprising a plurality of terminals, comprises the steps of: receiving a message or a message fragment at a given instant; evaluating the number of terminals currently sending; defining a congestion window, of duration ?Tf configured so as to be proportional to the number N of terminals currently sending and inversely proportional to the maximum input loading G of the network which makes it possible to obtain a substantially zero rate of retransmissions; for each terminal and each message or message fragment to be sent, make the start of the congestion window coincide with the given instant of receipt of a message or message fragment and define an actual instant of sending of the message or message fragment as a random value taken in the congestion window.