Abstract: A hybrid type rotorcraft having a main rotor, at least two propulsion elements each mounted on respective half-wings arranged symmetrically on either side of an anteroposterior midplane XOZ, a horizontal stabilizer arranged in a rear zone of the rotorcraft on either side of the anteroposterior midplane XOZ, and two fins arranged respectively on either side of the anteroposterior midplane XOZ, each of the two fins comprising a respective left/right bottom fin airfoil arranged below the horizontal stabilizer and a respective left/right top fin airfoil arranged above the horizontal stabilizer.

Abstract: A hybrid type rotorcraft having a main rotor, at least two propulsion elements each mounted on respective half-wings arranged symmetrically on either side of an anteroposterior midplane XOZ, a horizontal stabilizer arranged in a rear zone of the rotorcraft on either side of the anteroposterior midplane XOZ, and two fins arranged respectively on either side of the anteroposterior midplane XOZ, each of the two fins comprising a respective left/right bottom fin airfoil arranged below the horizontal stabilizer and a respective left/right top fin airfoil arranged above the horizontal stabilizer.

Abstract: A method manufactures a metal alloy part by spark plasma sintering. The method includes the simultaneous application, inside a die, of a uniaxial pressure and of an electric current to a powder component material that has the following composition: 42 to 49% aluminum, 0.05 to 1.5% boron, at least 0.2% of at least one element selected from tungsten, rhenium and zirconium, optionally 0 to 5% of one or more elements selected from chromium, niobium, molybdenum, silicon and carbon, the balance being titanium and the total of the elements without aluminum and titanium being between 0.25 and 12%.

Abstract: A wavefront analyzer is modified to simply determine the differences in amplitude and tilt which can exist between the different regions of an initial wavefront (S0). To achieve this, interference between two waves only is produced from beams (F1, F2) which come from neighboring regions on the initial wavefront. Such an analyzer can be used to coherently combine laser radiation produced by different sources arranged in parallel. Another use is for the determination of the differences in height and inclination which exist between the neighboring mirror segments of a Keck telescope.

Abstract: Disclosed is a method for measuring an external parameter by atomic interferometry, using two sets of atoms that belong to different species. Two measurements are taken simultaneously at the same location, but independently from one another, in order to obtain two measurement results. One of these measurement results removes an indeterminacy among several possible values of the external parameter, by taking into account only the other measurement result. A method of this kind can be used to measure a coordinate of a gravitational field or a coordinate of an acceleration of the atoms.

Abstract: A laser source (100) is intended for a device for interacting simultaneously with several atomic species within time intervals which are common to these species. The laser source includes a laser radiation generating set (1), an optical amplifier (2), and a frequency doubler set (3). A component for time-division multiplexing (5) assign in alternation at successive time sub-intervals, initial radiations corresponding to interaction radiations dedicated to different atomic species. The result of the interactions with one of the atomic species is then identical to the result of the interactions with a continuous radiation dedicated to the atomic species.

Abstract: Disclosed is a method for measuring an external parameter by atomic interferometry using two sets of atoms that belong to different species. Two measurements are taken simultaneously at the same location, but independently from one another, in order to obtain two measurement results. Constant phase shifts that appear in the atomic interferences for the two atom sets are quadrature-adjusted in order to ensure that one of the two measurements provides a value for the external parameter with satisfactory accuracy.

Abstract: The invention relates to a process for fabricating a high-precision object made of at least one inorganic material, comprising the following steps: using a high-resolution photolithography process, employing X-rays or UV rays depending on the desired degree of precision, in a chosen direction Z, to form a negative mold, which does not deform at the microscale during the steps of the process, in a material able to withstand a step for forming the object by dry deposition and capable of either being removed without altering the object fabricated or being separated from said object; choosing, independently of the normal redox potential of its constituent elements, at least one inorganic material from the set of materials that can be deposited by dry deposition and that allow the object to be fabricated to meet its thermomechanical and environmental specifications; and forming, by means of the non-deformable negative mold, the object to be fabricated by dry deposition of said at least one inorganic material, ther

Abstract: A soundproof panel has a sandwich structure, which includes two outer walls, a core, and modifying elements that are maintained in a fractal distribution by the core. The panel has an improved trade-off between sound attenuation efficiency and the weight of the panel.

Abstract: The invention, which relates to a miniaturizable plasma thruster, consists of: —igniting the plasma by microhollow cathode discharge close to the outlet and inside the means for injecting the propellant gas, said injection means being magnetic and comprising a tip at the downstream end thereof; —bringing the electrons of the magnetized plasma into gyromagnetic rotation, at the outlet end of said injection means; —sustaining the plasma by means of Electron Cyclotron Resonance (ECR), said injection means being metal and being used as an antenna for electromagnetic (EM) emission, the volume of ECR plasma at the outlet of said injection means being used as a resonant cavity of the EM wave; —accelerating the plasma in a magnetic nozzle by diamagnetic force, the ejected plasma being electrically neutral.

Abstract: A method for range imaging allows determining respective distances to multiple objects, based on a single image. The image is captured through a component having a transmittance function of which the Fourier transform is inscribed on a circle within a plane of spatial frequencies. A Fourier transform of the captured image is calculated in order to obtain a total spectrum for the image content. The distance to each object is then calculated based on several homothetic superimpositions of a reference spectrum with the total spectrum, so that said reference spectrum coincides with a portion of the total spectrum each time.

Abstract: An inertial sensor for measuring information relating to rotation in three orthogonal axes, comprising a support and a vibrating sensitive element secured to the support; the sensitive element having a deformable frame and at least two deformable projections which extend in a plane (X-Y); wherein the inertial sensor extends in the same plane; the deformable frame and the at least two deformable projections have a plane of symmetry parallel to the plane; the at least two projections are rectilinear beams which have an approximately square cross section, are not collinear and are preferably approximately orthogonal to one another; each of the deformable beams being connected by only one end to the deformable frame at a location at which the amplitude of the primary vibration mode is at a maximum; and in that the sensor has a device for detecting each of the secondary vibration modes.

Abstract: Method and monopole antenna for making uniform the radiation of the antenna, when disposed inside a radome. According to the invention, on the surface of the monopole antenna is formed a protruding longitudinal ridge which is disposed at least approximately opposite an area of the radiating pattern of the assembly radome (1)-monopole antenna having a reduced gain in comparison with the radiating pattern of said monopole antenna alone.

Abstract: An optical probe for measuring physical and chemical characteristics of a transparent fluid medium during flow comprises two fingers parallel to one another and to the flow. Each finger consists of a solid bar of transparent material, in which a light beam propagates and is reflected on an end face of the bar, said face being situated upstream in the flow. Such an optical probe may be reduced in size, and provides results which are less sensitive to disturbances of the flow that are caused by the probe itself.

Abstract: Generator (1) of synthetic jets (2) for a main flow of fluid, comprising a cavity (10) delimited by a fixed wall (13) and a mobile wall. The fixed wall comprises a sleeve (8) and a head (4) provided with an orifice (14) through which the generated jet of fluid (2) is drawn in from and ejected into the main flow of fluid. The mobile wall is opposite the head. The generator comprises a rigid piston (3) including the mobile wall and sliding in a fluid-tight manner in the sleeve (8), and comprises an actuator mechanically linked with the piston and able to drive the piston with an alternating movement having an amplitude and a frequency. The actuator is capable of providing a movement of variable amplitude and frequency, at least the amplitude being variable during the movement. The actuator comprises a mechanism for the mechanical amplification of displacement.

Abstract: The invention relates to a measurement by means of atom interferometry, using a Raman source that is created by modulating a monochromatic laser source. By conveniently selecting positions in which interactions between atoms and a laser radiation, produced by the Raman source, are caused, it is possible to eliminate or at least reduce a measurement bias caused by supplementary components of the laser radiation. Such a measurement having eliminated or reduced bias can be used in an inertia sensor.

Abstract: An atom interferometer with differential inertial measurement comprises an atom source system to supply several sets of atoms intended for acceleration measurements which are made simultaneously at different respective locations. The sets of atoms are transported by a dedicated system between an initial position and the locations at which the acceleration measurements are made. The interferometer can be used to obtain highly accurate acceleration or gravity gradient measurement results.

Abstract: The present disclosure relates to an imaging system comprising an impulsion light source for an input light beam oriented toward an observed area and an optoelectronic sensor having a photosensitive surface with a visibility capable of substantially covering the observed area. An impulsion of the incident light beam is backscattered by only by a portion of the observed area into a backscattered spot on the photosensitive surface. A deflection device deflects the impulsions of the incident light beam onto the respective portions of the observed area. A device acquires the thumbnail images corresponding to the backscattered spots resulting in impulsions of the incident light beam. The system combines said thumbnail images to produce an image having a sufficiently high signal-to-noise ratio for portions of interest of the observed area, a high spatial resolution, and a greater insensitivity to motion blurs.

Abstract: Disclosed are a method and system for improving real-time determination of flight parameters of an aircraft during flight. A selection module selects and delivers measured values of input parameters to an estimation unit, and the estimation unit uses the input parameters to estimate at least two selected flight parameters. The input parameters are received by the estimation unit on the basis of identified flight mechanics equations associated with the selected flight parameters. The estimation unit includes an extended Kalman filter, which is configured to receive the values of the input parameters and to output joint estimations of the selected flight parameters based on the flight mechanics equations, during the flight of the aircraft.

Abstract: A method for range imaging allows determining respective distances to multiple objects, based on a single image. The image is captured through a component having a transmittance function of which the Fourier transform is inscribed on a circle within a plane of spatial frequencies. A Fourier transform of the captured image is calculated in order to obtain a total spectrum for the image content. The distance to each object is then calculated based on several homothetic superimpositions of a reference spectrum with the total spectrum, so that said reference spectrum coincides with a portion of the total spectrum each time.