Abstract: A biometric verification method for verifying the authenticity of a fingerprint acquisition of a reference image of a reference fingerprint including acquisition of a candidate image of a candidate fingerprint, geometric comparison between the geometric characteristic of the pattern of said reference print and the geometric characteristic of the pattern of said candidate print extracted from the acquired images, determination of geometric coherence between said reference print and said candidate print as a function of the result of the geometric comparison step and of the reference and candidate digital geometric configuration information extracted from the acquired images, and decision-making as to the authenticity of said candidate fingerprint as a function of the result of the geometric coherence determination step.

Abstract: An ablative composite material including a matrix and a reinforcement, characterised in that: the matrix is a phenolic resin or an epoxy resin and the reinforcement is formed of short carbon fibres with a length of between 0.5 mm and 20 mm, and a diameter of between 6 ?m and 20 ?m.

Abstract: The invention relates to a helmet comprising at least one movable visor and a shell to protect the head of the wearer, characterized in that the visor is attached to a support connected to the outer surface of the shell by a rotary mechanism making it possible to move the visor around the shell, the rotary mechanism consisting of a single mechanical connection positioned substantially at the top of the shell. The invention is designed particularly for the military aviation field and also applies to helmets comprising several visors.