Abstract: A cycloidal dynamic propulsion or positioning system for a ship in water that exhibits a direction of flow, including a frame, a rotor mounted to be movable in rotation on the frame about a main axis at right angles to the flow, including a plurality of arms extending radially with respect to the main axis, a main motor equipped with a rotary coder and driving the rotor in rotation, for each arm, a blade mounted to be movable in rotation on the arm about a secondary axis parallel to the main, for each blade, a secondary motor equipped with a rotary coder and driving the blade in rotation, for at least one blade, a load sensor able to evaluate the loads exerted on the blade, and a control unit connected to each coder, strain sensor and motor and controlling the rotation of each motor in terms of angle and speed.

Abstract: A cycloidal dynamic propulsion or positioning system for a ship in water that exhibits a direction of flow, including a frame, a rotor mounted to be movable in rotation on the frame about a main axis at right angles to the flow, including a plurality of arms extending radially with respect to the main axis, a main motor equipped with a rotary coder and driving the rotor in rotation, for each arm, a blade mounted to be movable in rotation on the arm about a secondary axis parallel to the main, for each blade, a secondary motor equipped with a rotary coder and driving the blade in rotation, for at least one blade, a load sensor able to evaluate the loads exerted on the blade, and a control unit connected to each coder, strain sensor and motor and controlling the rotation of each motor in terms of angle and speed.

Abstract: The invention relates to an acoustic phase mask, the phase mask having a variation in the acoustic index n, characterized in that the phase mask comprises a body comprising: at least one matrix formed from a deformable solid material, having a shear modulus of less than 10 MPa, and pores formed in the matrix, the pores being mostly filled with gas, the deformable solid material extending between the pores, the body having a porosity ? less than or equal to 50%, and a controlled porosity ? gradient resulting in a variation of the acoustic index n spatially in the body.

Abstract: The present invention provides a method (30) of determining mechanical properties of the pelvic cavity of a person or an animal, the pelvic cavity including a plurality of organs and the method comprising a step (34) during which pressure is measured at one or more points of the surface of one of the organs of said pelvic cavity, and during which, simultaneously, movements of a plurality of organs of said pelvic cavity are also measured. The present invention also provides a measuring device for measuring pressure in an organ of the pelvic cavity in order to perform the above method (30). The measuring device comprises an optical fiber pressure sensor mounted in a non-metallic housing, and a closed flexible reservoir mounted in said non-metallic housing and having a surface, in particular a flexible surface, that constitutes a pressure measuring surface.

Abstract: A method of estimating the distribution of bone mineral density in at least one portion of a person's skeleton. The method includes generating a geometrical representation of the portion of the skeleton; a geometrical representation in three dimensions of at least one portion of the outline of the person; and first and second X-ray images; and using software to estimate: a value for the thickness of soft tissue through which the given X-ray has passed; an attenuation coefficient of the soft tissues that have been passed through; a value for the thickness of bone tissue through which the given X-ray has passed; and using the thickness value for the soft tissue through which the given X-ray has passed, and a value for the attenuation of the given X-ray due to the thickness of the bone tissue through which it has passed, the software estimates a value representative of the bone mineral density of the bone tissues through which the given X-ray has passed.

Abstract: A method of simulating the behavior of an articulated set of bone parts, in particular the vertebral column comprising a construction step of constructing a three-dimensional geometrical model from data that is specific to the subject in a reference position; and a mechanical customization step of determining the geometrical model by detailing at least some of the connection areas of the bone parts. The mechanical customization step includes a stage of customizing critical connection areas for the bone parts; a data acquisition stage of acquiring data concerning the articulated bone set of the subject during at least one clinical test of posture; and a characterization stage for characterizing the mechanical parameters of said junction areas in order to cause the model to reproduce the data acquired during the above-mentioned clinical test.

Abstract: Method for reconstruction of a three-dimensional model of a body structure of a subject, said structure comprising a plurality of objects, wherein a database (21) of the structure is provided, the database comprising means to estimate, from a parameter of any object of the structure, another parameter for an object of the structure, a preliminary solution for a first object (L1) is modified to be brought in concordance with subject-specific data (23a, 23b), a reconstruction of the second object (T12) is obtained based on the modified first object and on the database of structure (21).

Abstract: A method of producing a finite-element model of a unique body of complex shape having an outer surface that is known in the form of a cloud of points describing said surface analytically or algebraically in a determined frame of reference, the method comprising the steps of a) using a parameterizable and generic finite-element model made up of simple geometrical volumes and representative of the family to which the unique body belongs, b) adapting said model as a function of parameters describing the unique body that is to be modeled; c) in said frame of reference, adjusting the parameterized generic finite-element model and causing the surface nodes of said parameterized model to correspond to points of the known outer surface of the body by projecting said nodes onto said surface along a direction that is normal to the surface of the generic model, and d) using the nodes of the surface as control points for a three-dimensional interpolation method in order to personalize the internal finite elements of the

Abstract: An aircraft (1) provided with a main gearbox (3) fastened to a load-bearing structure (2) via at least three suspension bars (5). An active vibration absorber (10) is fastened around each suspension bar (5), each vibration absorber (10) being provided with a first mass (11) connected to the associated suspension bar (5) via first resilient means (21), and with a second mass (12) connected to the first mass (11) via second resilient means (22), said vibration absorber (10) having a force generator (15) interposed between the first mass (11) and the second mass (12) and inputting a control force on being instructed by a control unit (16) as a function of information coming from at least one first measurement sensor (17) for sensing monitoring parameters for monitoring the associated suspension bar.

Abstract: In order to effect drilling without any risk of blockage of the cutting tool used, a drilling device uses means for producing a self-maintained axial vibration of the tool that has the effect of breaking up the swarf of the material removed from the hole in order to facilitate discharge thereof. The means for producing the self-maintained axial vibration are also such that the spindle of the tool can have a direction substantially different from the rotation axis of the means used for rotating the tool. Such a device is particularly advantageous for producing deep holes or during the use of cutting tools producing asymmetric cutting forces. In a particularly advantageous embodiment, the means for producing the self-maintained axial vibration and for enabling the rotation axis of the tool to have a direction substantially different from the rotation axis of the drive means form part of the cutting tool.

Abstract: A method of three-dimensionally reconstituting the shape of a singular body in a reference coordinate system and on the basis of initial imaging data acquired by an imaging system of the scanner or MRI type, wherein the method includes the steps of, constituting an approximate three-dimensional model of the singular body on the basis of a parameterizable generic model that is modified as a function of descriptive parameters derived from said initial data, and correcting the approximate model by comparing it (2) with the initial imaging data (D).

Abstract: Method for reconstruction of a three-dimensional model of a body structure of a subject, said structure comprising a plurality of objects, wherein a database (21) of the structure is provided, the database comprising means to estimate, from a parameter of any object of the structure, another parameter for an object of the structure, a preliminary solution for a first object (L1) is modified to be brought in concordance with subject-specific data (23a, 23b), a reconstruction of the second object (T12) is obtained based on the modified first object and on the database of structure (21).

Abstract: A method of simulating the behavior of an articulated set of bone parts, in particular the vertebral column of a subject comprising a construction step of constructing a three-dimensional geometrical model of the set from data that is specific to the subject in a reference position; and a mechanical customization step of customizing the geometrical model by detailing at least some of the connection areas of the bone parts.

Abstract: A calibration system is disclosed for a stereoradiographic device having an X-ray source and a vertical X-ray receiver, the calibration system includes a horizontal table which rotates between two reference positions that are separated by 90 degrees in a horizontal plane of the table. A vertical frame is fastened to the horizontal table and is symmetrical with an axis of rotation of the table, the frame accommodates a patient that remains stationary relative to the frame as the table is rotated between its two reference positions wherein corresponding X-ray photographs are taken. At least three markers made of radio-opaque material are firmly attached to the frame, one of the markers represents the origin of orthogonal X,Y and Z axes, a second of the markers is located at a predetermined point along the X-Y axes, the third marker located at a known distance along the Z axis, the markers defining respective distances Lx, Ly or H relative to the origin.

Abstract: The invention relates to an RX stereoradiography device comprising a horizontal rotating plate (13) which is optionally translational, characterized in that said plate (13) can be oriented according to two angular positions at 90°, each of which in order to take two photos which are orthogonal in relation to the other, also characterized in that the device also comprises a frame (14) which is joined to the horizontal plate (13) and, optionally, an additional maintenance device (15) for receiving the subject and at least three markers (16) made of a radio-opaque material disposed in a connected manner on the frame (14), one of said markers (1) being identified as the origin of an orthogonal, three-dimensional point of reference and the other markers (16) being disposed in such a way that it is possible to provide, by projection, knowledge of at least one distance value between the markers (16) according to the three axes X, Y and Z of said point of reference, respectively Lx, Ly and H.

Abstract: The apparatus comprises an air flow duct having an end portion fitted inside a nozzle whose front surface is trued so that it can be applied against the surface to be scanned and so that it can co-operate therewith to form a leak through which air flows as a function of the surface state of the part, and further comprises measuring means for measuring the flow rate of air passing through the leak. At its trued front surface, the nozzle delimits an annular air flow duct, and the portion of the nozzle inside the annular air flow duct includes a duct connected to the atmosphere.

Abstract: The invention relates to an optical anamorphoser and to its method of manufacture in which a bundle of fibers (3) is deformed by twisting, is imprisoned in a body (5), and is sliced along two planes (2 and 3) perpendicular to its axis (4).

Abstract: An inflatable chamber (2) is placed inside an outer support body (1), and the outer wall (3) of the inflatable chamber is pressed against the inside wall of the support body by plates (9) and draw bars (10), in such a manner that the inside wall (4) has substantially the same diameter (DGO) when the chamber (2) is under atmospheric pressure and when the chamber is under its maximum pressure for compressing the body against which the inside wall (4) is pressed.

Abstract: Ultrasonic process and apparatus for monitoring and measuring the evolution with time of physico-chemical and biological phenomena. There is plunged into the medium or media (4) to be monitored a bar (3) into which ultrasound (2) is injected in order to collect secondary echoes (F2, F3) due to numerous reflections from the lateral surface of the bar (3) brought into contact with the medium (4), one of the secondary echoes (F2) is selected and the evolution with time of the amplitude of this echo is recorded, this representing the evolution of the medium being monitored, in particular the setting of concrete or the polymerization of a resin.