Abstract: A method and to a device for managing energy of a hybrid power plant of a multi-rotor aircraft during a flight. The hybrid power plant comprises a thermal engine, an electricity generator, and a plurality of electric motors, together with a plurality of electrical energy storage devices. The aircraft has a plurality of rotors driven in rotation by respective electric motors. The flight of the aircraft comprises a takeoff stage, a cruising stage, and a landing stage, the takeoff stage and the landing stage being performed solely while consuming electrical energy. The method enables an electrification ratio RElec of the flight to be calculated as a function of the amounts of electrical and thermal energy that are consumed during the takeoff, landing, and cruising stages, thereby limiting the use of the thermal engine to the least possible amount during the cruising stage, and consequently reducing the associated nuisance.

Abstract: A method and to a device for managing energy of a hybrid power plant of a multi-rotor aircraft during a flight. The hybrid power plant comprises a thermal engine, an electricity generator, and a plurality of electric motors, together with a plurality of electrical energy storage devices. The aircraft has a plurality of rotors driven in rotation by respective electric motors. The flight of the aircraft comprises a takeoff stage, a cruising stage, and a landing stage, the takeoff stage and the landing stage being performed solely while consuming electrical energy. The method enables an electrification ratio RElec of the flight to be calculated as a function of the amounts of electrical and thermal energy that are consumed during the takeoff, landing, and cruising stages, thereby limiting the use of the thermal engine to the least possible amount during the cruising stage, and consequently reducing the associated nuisance.

Abstract: A correcting fluid with a colored drying indicator that includes as fluorescent dye, sodium 8-hydroxy-1,3,6-pyrenetrisulfonate and a good solvent for the fluorescent dye, in which the solubility of the fluorescent dye at 20° C. is at least equal to 0.1 g/l, and, a poor solvent for the fluorescent dye, in which the solubility of the fluorescent dye is less than or equal to 0.01 g/l at 20° C., the poor solvent being miscible with the good solvent for the fluorescent dye.

Abstract: A machine for testing electronic components or chips formed in a wafer (3) and each comprising a multiplicity of electrical connection pads formed on the surface of the wafer, which machine includes a test head (5) having a multiplicity of electrical connection test prods (11) and a mechanism for moving the wafer to be tested with respect to the head so as to bring the ends of the test prods into contact with the pads of each chip, in succession. The test head (5) carries heating and temperature-regulating elements (18) thermally coupled to the electrical connection test prods (11). Preferably, the test head (5) includes a metal block (16) thermally coupled to the electrical connection test prods (11). The heating and temperature-regulating elements (18) are thermally coupled to the metal block.

Abstract: Apparatus for identifying multiparametric properties of particles, comprising:a non-divergent quadric reflector,a transparent capillary tube passing through the focus of said reflector,at least one means of irradiating the focus,a mask obstructing the non-reflected scattered rays,a photosensitive cell receiving the reflected scattered rays,and means of processing the signals.An application to the monitoring of latex particle size distribution is described.