Abstract: A radome system for fastening an aircraft radome, wherein the system includes a plurality of first fasteners each designed to put the radome into a position along two distinct axes contained in a plane approximately perpendicular to the longitudinal axis (L) of this fastener; and a plurality of second fasteners each designed to put the radome into a position along a single axis of a plane approximately perpendicular to the longitudinal axis (L) of this fastener.

Abstract: The invention relates to a device for fastening an aircraft radome (2) which comprises: a plurality of first fasteners (10) each designed to put said radome into a position along two distinct axes contained in a plane approximately perpendicular to the longitudinal axis (L) of this fastener; and a plurality of second fasteners (12) each designed to put said radome into a position along a single axis of a plane approximately perpendicular to the longitudinal axis (L) of this fastener. The invention also relates to an aircraft comprising a nose radome fixed to the aircraft using such a device, and an assembly method for assembling a radome (2) on an aircraft fuselage (1).

Abstract: The invention generally concerns a novel family of biocompatible surfactant copolymers having a wide range of uses, in particular in pharmaceutics and for synthesizing substances in dispersed state and for surface treatment of materials or biomaterials. Said copolymers are characterised in that they comprise a hydrophobic sequence constituted by: either a homopolymer consisting of recurrent units corresponding to the general formula (I): in which: R1 represents a C1-C6 alkyl group or a (CH2)m—COOR3 group wherein m is an integer between 1 and 5 and R3 represents a C1-C6 alkyl group; R2 represents a C1-C6 alkyl group; and n is an integer between 1 and 5; or a random copolymer consisting of different recurring units corresponding to formula (I) as defined above; or finally a random copolymer consisting for the major part of units corresponding to formula (I) as defined above.

Abstract: A method for the suture of wounds, includes applying a sufficient quantity of a biocompatible, bio-adhesive mixture with at least 50% by weight of a methylidene malonate-based composition containing: 40 to 100% by weight of at least one methylidene malonate of formula (I):  in which: A and B independently represent a group (a) or (b): in which R1 and R2 independently represent a linear or branched alkyl group with 1 to 6 carbon atoms, n is an integer between 1 and 5, and at least one of A and B represents a (b) group; and/or one or more methylidene malonate oligomers with a molecular weight less than or equal to 6,000 and including recurrent units of formula (II): in which A and B are as defined above; and 0 to 60% by weight of at least one methylidene malonate polymer with a molecular weight greater than 6,000 and including recurrent units of formula (II).

Abstract: The invention concerns a method for the mechanochemical treatment of a material characterised in that to improve said material surface properties by mechanochemical anchoring, such as in particular its adhesive capacity during subsequent assembling, or to improve its use properties by producing composite structure surface coatings, consisting in projecting on said material particles with laminated structure consisting of a core and a coating comprising at least a polymer and optionally a chemical agent, in conditions such that said particles and/or fragments resulting from their fracturing are embedded and/or penetrate into said material. The invention is applicable in dentistry, the biomedical field, motor industry, avionics, printing industries, agro-industry, mechanical industries.

Abstract: Nanoparticles formed from a random polymer of at least one compound of formula (I) in which A represents a group or a group; R1 and R2, identical or different, represent a linear or branched C1-C6 alkyl group; n=1, 2, 3, 4 or 5, having a diameter of less than 500 nm and an average molecular mass (Mw) between about 8000 and 100000, the nanoparticles being formed from homogeneous molecular species, and optionally containing a biologically active material.

Abstract: The invention relates to a method for the preparation of nanoparticles formed from a random polymer of at least one compound of formula (I) 1

Abstract: The invention relates to a method for the preparation of nanoparticles formed from a random polymer of at least one compound of formula (I) in which A represents a  group or a  group; R1 and R2, identical or different, represents a linear or branched C1-C6 alkyl group; n=1, 2, 3, 4 or 5, characterised in that the monomer is dissolved beforehand in a water-miscible aprotic organic solvent forming, with the polymerisation medium, a non-solvent mixture of the polymer formed.

Abstract: A device for uniformly and virtually instantaneously mixing at least two fluids, comprising at least two feed channels each of which is shaped and sized so that it produces flat fluid streams, whereby a uniform mixture may be achieved virtually instantaneously in a limited area.

Abstract: A device for studying the interaction of a fluid flowing in a porous medium surrounded by a membrane and subjected to a confining pressure includes on at least part of the circumferential periphery of the membrane, a groove connected to a pressure tap for measuring or detecting the pressure prevailing at the groove.

Abstract: The invention concerns low molecular weight copolymers of acrylic acid or at least partially salified acrylic acid and acrylamide, their process of manufacture and their use. These copolymers may be used to prevent the formation of deposits on the walls of oil or geothermal equipment from aqueous systems containing dissolved salts. The copolymer is characterized in that it comprises recurrent units deriving from acrylic acid and acrylamide in a proportion by weight from 95:5 to 25:75. Furthermore, the distribution of the molecular weights of the copolymer, as determined by exclusion analytic chromatography, is such that at least 60% of the weight molecular weights are lower than 500.

Abstract: A signal generator generates a temporal signal with a periodic configuration defined by an arrangement of seed patterns resulting from a branching construction iteratively using laws for composing several patterns and consisting in defining the periodic configuration of the signal as a component "a.sub.n " of the nth term Un with several components (a.sub.n, b.sub.n) of a recurrent sequence defined at the level of each of its components by a specific recurrent composition law, the initial term U0 having for its components the seed patterns (a.sub.0, b.sub.0). The temporal signals known as "fractal" signals result from a branching construction of this kind. The generator comprises a microprocessor (10) associated with a keyboard-display system (11), a read-only memory (12) for programs, a random access memory (13) and an output digital-to-analog converter (14).

Abstract: The temporal signal generated has a periodic configuration defined by an arrangement of seed patterns resulting from a branching construction employing n successive applications of m pattern type laws each defined by a specific arrangement of p pattern types. This construction amounts to defining a periodic signal configuration as a component "an" of the nth term Un with several components (an, bn) of a recurrent sequence defined at the level of its components by a particular recurrent composition law, the initial term UO having for its components the seed patterns (aO, bO). The temporal signals known by the name "fractal" result from a branching construction of this kind.

Abstract: This process comprises the three successive following steps of:(a) injecting into a formation a solution of sodium or potassium hydroxide during a limited time interval to perform a chemical leaching treatment of the formation,(b) injecting a saline solution, and(c) establishing a circulation of a heat conveying fluid through the formation.