Abstract: The invention relates to a composite material formed by microparticles of magnetic material A and a conductive liquid B. The material is characterized in that the material A is chosen from magnetic compounds and magnetic alloys and is in the form of particles, the mean size of which is between 1 and 10 ?m, and in that the support fluid B is a conductive fluid chosen from metals, metal alloys and salts that are liquid at temperatures below the Curie temperature of the material A, or from mixtures thereof.

Abstract: The invention relates to a composite material formed by millimeter-scale particles of magnetic material A and a conductive liquid B. The material is characterized in that the material A is chosen from magnetic compounds and magnetic alloys and is in the form of particles, the mean size of which is between 0.1 and 2 mm, and in that the support fluid B is a conductive fluid chosen from metals, metal alloys and salts that are liquid at temperatures below the Curie temperature of the material A, or from mixtures thereof.

Abstract: The invention relates to a composite material formed by millimeter-scale particles of magnetic material A and a conductive liquid B. The material is characterized in that the material A is chosen from magnetic compounds and magnetic alloys and is in the form of particles, the mean size of which is between 0.1 and 2 mm, and in that the support fluid B is a conductive fluid chosen from metals, metal alloys and salts that are liquid at temperatures below the Curie temperature of the material A, or from mixtures thereof.

Abstract: A high sensitivity multiple waveform voltammetric method and instrument are provided for use in electrochemical and other applications. The method consists of applying one or several variable potential excitation signals between electrodes of an electrochemical cell to produce an electrochemical reaction in the solution. The excitation signals include a DC bias potential increasing cyclically by a potential step to form a potential staircase signal sweeping across a potential domain, and a number of pulse trains either of opposite polarity or shifted in potential per potential step. An electric current derived from a diffusion flux of ions through the solution is measured as a result of the applied excitation signal.

Abstract: The present invention relates to a system for the acquisition of data inscribed on a support. It more particularly applies to the acquisition of graphic data, such as characters, curves or all types of lines present on a reflecting or transparent support, whereby said data are monochromatic or polychromatic. The system according to the invention makes it possible to digitize graphic data on a support. It can also permit the acquisition of data in photometry, densitometry, and so forth.

Abstract: An interface for managing information exchanges on a communications bus between at least one control unit and peripheral units, or between said peripheral units.The exchanged information includes data and a destination address of said data. The interface is characterized in that it comprises for each unit, data transmission circuitry connected to the unit and to the bus for managing the data transmission on the bus to the unit having the destination address, data reception circuitry connected to the units and to the bus, for managing the reception of data by the unit having the destination address, and management circuitry for managing the addressing of the units during exchanges and in particular for managing access priorities to the bus, without necessitating the intervention of the control unit.This interface can be used for information exchanges between processing or measuring units.