Abstract: The present invention relates to a navigation assistance method for a mobile carrier (1) comprising an inertial navigation unit (10) comprising at least one inertial sensor (12), in which, over a determined observation window, the following steps are implemented by an estimation unit (11) of the inertial navigation unit (10): (E10) parametrisation of a non-linear system configured to estimate a navigation state of the mobile carrier (1) over a given time interval at an iteration n as a function of a kinematic model and/or measurements acquired by at least one inertial sensor (12); (E20) linearisation of the system so that the system expresses a navigation state at iteration n as a function of the state at iteration n?1 and a correction to this navigation state, said system being initialised by a first a priori state; (E21) estimating, by a Kalman filter and stochastic cloning, a first correction of a navigation state at iteration n; (E22) estimating a second correction of the navigation state at iteration n b

Abstract: This substrate for power electronic components comprises a colaminated multilayer composite material containing at least one internal layer (8) made of a material having a thermal expansion coefficient chosen depending on the expansion coefficient of said components, and external layers (6, 7) made of a thermally conductive material covering on either side said internal layer and connected together by wells (P) made of a thermally conductive material, said wells being arranged in the internal layer. Each interior layer forms an insert localized in a zone for mounting the components so that the external layers extend laterally beyond the insert.

Abstract: A method of manufacturing a sensor for detecting trace or impurity gases, the method comprising evaporating tin and/or tin oxides under a partial pressure of oxygen in order to condense vapor on an electrically insulating substrate to obtain a porous layer deposit therein. The metal or the metal oxides is/are evaporated under a flow of a mixture of gases containing both oxygen and an inert gas at a total pressure of not less than 100 pascals and with the partial pressure of the oxygen in the mixture being not more than 130 pascals.

Abstract: Monocrystalline alloy with a nickel base matrix without intentional addition of carbon, of boron or of zirconium, having a composition by weight: Co 0 to 10% - Cr 5 to 7% - Mo 1.5 to 2.5% - W 8.5 to 12.5% - Ta 0 to 6.5% - Al 5 to 7% - Nb 0 to 2% - Ni balance to 100. Furthermore, the summation of the atomic percentages 0.005 0.005 Xo+0.036 Cr+0.052 Mo+0.066 W+0.026 Al+0.116 Nb +0.049 Ta is less than one and the summation of the atomic percentages Ta+W+Mo+Nb lies between 5.9 and 6.3. The alloys having an elevated solidus temperature, in excess of 1325.degree. C., are particularly adapted to monocrystalline casting of the vanes of the turbine inlet nozzle array and having significantly improved properties of strength under conditions of thermal fatigue and oligocyclic fatigue.

Abstract: The invention relates to a thermal energy storage material, comprising a substantially homogeneous mixture of at least one compound having, in a temperature range of between 0.degree. C. and 200.degree.0 C., a solid-solid phase transition having a variation in enthalpy at least equal to 50 J/g, with an organic binder selected from the group consisting of polyepoxyde resins and polyurethane resins, stable at the temperature of the phase transition.

Abstract: This device comprises (a) a removable compact cell which can be accurately weighed. A sample is introduced into this cell, with the cell equipped with a magnetic stirrer and with at least one measuring gauge. This cell has a sliding cover plate for varying its volume. The device includes (b) a pressurizing unit whose temperature can be controlled and which is provided with a housing for receiving the cell. In combination with the above, there is provided (c) a calibrated hydraulic press operatively associated with the sliding cover plate to compress the fluid contained in the cell.

Abstract: A process for producing hydraulic binders comprising essentially calcium and silicon oxides by adding, to a mixture composed of compounds containing oxygen, calcium, silicon, and optionally other elements which are normally encountered in conventional raw materials, particularly aluminium, at least one disturbing agent capable of modifying the crystallinity of the minerals normally formed by the firing of said mixture of compounds at high temperatures, firing said mixture of compounds containing said disturbing agent, and recovering a mineral product possessing hydraulic properties.