Matra

About: Matra is a based out in . It is known for research contribution in the topics: Signal & Detector. The organization has 1330 authors who have published 1216 publications receiving 17967 citations.

Method and device for determining the valley contours of a given geographic area

Abstract: The method involves a processing and cartographic visualisation unit (2) receiving data files through a link (8). This unit determines the probable hydrographic system for the geographic zone. A second unit (3) uses the same link to assign altitudes to each point in the zone. Tributaries and confluences of the hydrographic system are identified (4) and valley points likely to belong to valley contours are determined (5) from the first and second matrices. Segments of valley contours are defined (6) from the valley points and the tributaries and confluences and further processing (7) produces the full valley contours from the segments.

One-piece heart prosthesis implantable in an anatomical position

Abstract: Prothese cardiaque monobloc implantable en position anatomique. one-piece implantable cardiac prosthesis anatomical position. Selon l'invention, les ventricules gauche et droit artificiels (2, 8) presen¬ tent des directions generales (14, 15) disposees en V asymetrique, de facon que lesdits ventricules se rapprochent l'un de l'autre en s'eloi- gnant des moyens de raccord (6, 12) aux oreillettes gauche et droite naturelles, et les actionneurs hydrauliques individuels (7, 13), associes respectivement auxdits ventricules gauche et droit artificiels (2, 8), sont disposes proches l'un de l'autre, au voisinage dudit ventricule artificiel gauche (2). According to the invention, the artificial left and right ventricles (2, 8) presen¬ tent branch (14, 15) arranged in asymmetrical V, such that said ventricles approach each other in s' eloi- Gnant connection means (6, 12) to the natural left and right atria, and the individual hydraulic actuators (7, 13) associated respectively with said artificial left and right ventricles (2, 8) are arranged near each the other, in the vicinity of said artificial left ventricle (2).

Charge militaire explosive

Abstract: La charge comporte une enveloppe cylindrique (10) externe de formation d'eclats contenant une masse explosive munie d'au moins un relais pyrotechnique (18) d'amorcage. La masse fournit une onde de detonation cylindrique lorsqu'elle atteint l'enveloppe. Cette enveloppe (10) est fragilisee suivant des cercles (24) et des lignes (26) paralleles a l'axe.

Dual speed clutches with brake

Abstract: A DEVICE FOR DRIVING AND STOPPING A MACHINE, MORE PARTICULARLY A SEWING MACHINE. BETWEEN AND ELECTRIC DRIVING MOTOR AND AN OUTPUT PULLEY OR THE LIKE CONNECTED TO THE MACHINE, THERE IS PROVIDED A SPEED-REDUCING TRAIN AND AN ELECTROMAGNETIC-CLUTCHING AND -BRAKING DEVICE. THE LATTER COMPRISES TWO COAXIAL COILS, ONE OF WHICH CONTROLS THE CLUTCHING BY CAUSING, UPON EXICITATION, THE MOVEMENT OF AN ASSEMBLY INTEGRAL WITH A CLUTCH-COUPLING MEMBER AND THE OTHER ONE OF WHICH CONTROL THE BRAKING BY APPLICATION OF A FRACTION PACKING HOUSED IN A SUPPORT OF SAID ELECTROMAGNETIC DEVICE AGAINST A PLATE INTEGRAL WITH THE MOVEABLE ASSEMBLY.