Abstract: An optical device and an optical method for measuring dose absorbed by a radiochromic material, the method including successively submitting the radiochromic material to a first electromagnetic measurement emission at a first wavelength and to a second electromagnetic measurement emission at a second wavelength, and measuring first and second measurement signals corresponding to the parts of the first and second electromagnetic measurement emissions not absorbed by the radiochromic material, respectively. The measured absorbed-dose value is determined, in the case where the first or second measurement signal corresponds to an absorption higher than a given threshold, on the basis of the second signal and, in the contrary case, on the basis of the first signal.

Abstract: A device for recovering or dampening vibratory energy from a mechanical resonator, comprising: an electrical generator comprising an element for converting mechanical vibration energy into electrical charges coupled to the resonator, the electrical generator periodically transferring a portion of the electrical charges from one terminal of the conversion element to the other; a frequency variation to phase variation conversion device, comprising an injection-locked oscillator of which the free-running oscillation frequency is equal to the resonance frequency of the resonator, and supplying to the electrical generator a control signal of frequency equal to that of the signal outputted by the conversion element and of which the phase shift depends on the difference between the frequency of the signal outputted by the conversion element and the resonance frequency of the resonator.

Abstract: The invention relates to an inertial sensor (1) comprising a substrate extending along a drive excitation direction (x) and a detection direction (y) normal to each other, the device plane being perpendicular to a rotation direction (z), a first drive frame (110) and a second drive frame (120), a first sense frame (210), a second sense frame (220), a sense lever (1000) pivotably mounted around a rotation axis (1001), a sensing system comprising a strain gauge (1600) mechanically stressed by the sense lever it is rotating around the rotation axis. The sense lever includes a central portion (1500), a first arm (1100) and a second arm (1200), the central portion having a dimension along the detection direction called central width, the arms having a dimension along the detection direction called arm width, the central width being at least twice greater than the arm width.

Abstract: A new implementation is provided for an error back-propagation algorithm that is suited to the hardware constraints of a device implementing a spiking neural network. The invention notably uses binary or ternary encoding of the errors calculated in the back-propagation phase to adapt its implementation to the constraints of the network, and thus to avoid having to use floating-point number multiplication operators. More generally, the invention proposes a global adaptation of the back-propagation algorithm to the specific constraints of a spiking neural network. In particular, the invention makes it possible to use the same propagation infrastructure to propagate the data and to back-propagate the errors in the training phase. The invention proposes a generic implementation of a spiking neuron that is suitable for implementing any type of spiking neural network, in particular convolutional networks.

Abstract: A microelectromechanical accelerometer includes a support, at least one mass suspended by suspension means relative to the support and configured to move in the plane of the accelerometer, means for measuring the displacement of the seismic mass including at least one first vibrating beam of nanometric cross-section, and first electrostatic coupling means between the seismic mass and said at least one first vibrating beam configured to ensure a mechanical decoupling between the first vibrating beam and the seismic mass. At rest, the first electrostatic coupling means generates traction on the first vibrating beam, so that under the effect of acceleration the state of strain of the first vibrating beam is modified.

Abstract: A process for preparing a component, which may constitute an interconnector for a fuel cell (SOFC) or a high-temperature electrolyser (HTE), may include: (a) preparing a substrate made of metal alloy, the base element of which is iron (Fe) or nickel (Ni), the substrate having two main flat faces; (b) tape casting a thick ceramic layer; (c) localized removal at one or more locations, of material of the tape-cast thick ceramic layer; (d) hot pressing the green thick ceramic layer tape; and (e) grooving the thick ceramic layer so as to delimit channels that are suitable for distributing and/or collecting gases. A component may be obtained from such a process.

Abstract: A method is provided for generating a multi-carrier reflectometry signal intended to be injected into a transmission line in order to identify a presence of at least one possible fault on the transmission line. The method includes: generating, in the frequency domain, a phase-modulated multi-carrier digital signal by: generating a digital signal, phase-modulating the digital signal based on a constellation of symbols, rounding the obtained phase to the phase of the symbol of the constellation that is closest, and converting the generated signal into the time domain.

Abstract: The present invention relates to a method for predicting the invasive potential of a tumor cell and predicting the efficiency of a treatment. The method is based on the combination of at least three parameters, namely the internuclear distance, the polarization and the cell-cell connectivity.

Abstract: An imaging pixel formed by a photodetector connected to a reading circuit comprising: an integration capacitance, a transistor for resetting the integration capacitance, a coupling transistor between the photodetector and the integration capacitance, a memorisation capacitance, a second transistor for resetting the memorisation capacitance, a memorisation switch between the integration capacitance and the memorisation capacitance, to enable different configurations corresponding to different phases of assessing parameters of the pixel and in particular a ratio R=Cint/Cmem.

Abstract: The present invention relates to a method for producing a silicon ingot from a silicon melt by directional solidification, wherein the growth of the silicon ingot is initiated by bringing the silicon melt into contact with at least one silicon seed, characterised in that at least the surface of the seed brought into contact with the silicon melt is oxidised.

Abstract: A nuclear reactor with liquid coolant and solid fuel assemblies incorporates a heat removal system using a liquid metal bath for removing nominal heat and phase-change material(s) (PCM) for removing the decay heat in an accident situation. The nuclear reactor uses a liquid metal or molten salt primary coolant that simultaneously ensures passive heat removal, by natural convection in the primary circuit, in normal and accident operating modes during shutdown through the primary vessel of the reactor, that is, beyond the second containment barrier. In the event of an incident or accident, a compact passive decay heat removal system is capable of performing the safety function for a predetermined period, typically three days, without any intervention by an operator, due to the presence of one or more PCM(s) that store(s) the decay heat produced in the core and removed by the primary vessel.

Abstract: The invention relates, firstly, to a method for patterning a functional layer (130), comprising at least the following steps of: providing a substrate (110) having a surface locally covered by a so-called sacrificial layer (120), one or more areas of the surface of the substrate (110) being devoid of the sacrificial layer (120); selectively growing the functional layer (130) on the area(s) of the surface of the substrate (110) devoid of the sacrificial layer (120); eliminating the sacrificial layer (120); whereby the surface of the substrate (110) is covered by a patterned functional layer (130). Subsequently, the invention relates to a method for preparing a MIM capacitor, implementing the patterning method for patterning at least one layer of the capacitor. Applications: micro- and nano-electronic devices such as electronic chips, manufacturing of high-density MIM capacitors.

Abstract: A magnetic resonance (MR) image may be created from MR data by receiving the MR data, applying a transform to the MR data, where a result of the applying is an image space representation of the MR data, determining a wrapped phase map of the image space representation of the MR data, obtaining an unwrapped phase map based on the wrapped phase map, scaling the unwrapped phase map into a B0 field map, reconstructing the MR image based on the MR data, correcting the MR image based on the B0 field map, and outputting the MR image. The scaling may be free of accounting for effects on the MR data by artifact sources secondary to B0 field inhomogeneities.

Abstract: A method for producing at least one nitride layer includes providing a stack having a plurality of pillars extending from a substrate of the stack. Each pillar includes at least a crystalline section and a summit having a summit surface area The method also includes growing by epitaxy a crystallite from the summit of some the plurality of pillars and continuing the epitaxial growth of the crystallites until the crystallites supported by the pillars coalesce. The plurality of pillars includes at least one retention pillar and separation pillars. The pillars are configured so that once the nitride layer is formed, the at least one retention pillar retains the nitride layer and some of the separation pillars can fracture.

Abstract: A bench for mechanically characterising a battery cell by applying a compressive force includes a frame carrying a bottom compression assembly and a top compression assembly, means for applying a compressive force to the cell between the compression assemblies, and a force sensor. Each compression assembly includes a compression part and a mounting surrounding the compression part. The compression part and the mounting are at least partly mechanically dissociated. The mounting of the top compression assembly carries movement sensors that measure the movement between the two mountings.

Abstract: A method for characterizing a particle present in a sample, the sample lying between an image sensor and a light source and the sensor lying in a detection plane, includes illuminating the sample with the light source which emits an incident light wave propagating along a propagation axis, and acquiring an image of the sample with the sensor. The sensor is exposed to an exposure light wave. The image includes a plurality of elementary diffraction patterns each corresponding to one particle. The method also includes reconstructing a complex image representative of a complex amplitude of the light wave on a reconstruction surface passing through the sample, based on the acquired image; selecting a region of interest of the complex image corresponding to a particle of interest; forming an extracted image based on the region of interest; and characterizing the particle of interest depending on the extracted region of interest.

Abstract: A wire-patch antenna includes a ground plane; a capacitive roof placed facing the ground plane at a predetermined distance of separation; a probe feed; at least one electrically conductive short-circuiting wire linking the capacitive roof and the ground plane, the short-circuiting wire being intended to excite a first resonant mode at a first resonant wavelength; and at least one electrically conductive impedance-matching wire linking the conductive short-circuiting wire and the probe feed so as to create a parasitic inductor.

Abstract: A UWB pulse emitter includes an H-bridge having first and second branches in parallel, a first end common to the branches being connected to a first amplitude control module to regulate a high voltage, a second end common to the branches being connected to a second amplitude control module to regulate a low voltage. A first envelope control module controls the shape of the positive portion of a UWB pulse and a second envelope control module controls the shape of the negative portion of this pulse. Each branch comprises first and second switches for respectively switching the high voltage to a first or second input of the first envelope control module and the low voltage to a first or second output of the second envelope control module. Centre taps of the branches, between which the UWB antenna is connected, connect the outputs and the inputs of the control modules.

Abstract: A method for training a logistic regression classifier on a dataset by using a resistive RAM as hardware accelerator, each row of the resistive RAM including cells which can be programmed in a first resistance state or a second resistance state. The probability of a data element belonging to a class is modelled by a logistic function applied to a score of the element, where is a parameter vector of the model. The logistic regression classifier is trained by populating the resistive RAM with samples of a model parameter vector which are obtained by MCMC sampling. Once populated, the resistive RAM can be used for classifying new data.

Abstract: A device including a sensor capable of carrying out dynamic force or mass measurements, for example a force sensor, including a magnetic device to generate a magnetic field according to at least one axis (XX?), a device to adjust and then hold a relative position, according to the axis (XX?), between a force sensor to be tested and the magnetic device, and a device to measure a signal representative of a tensile or compressive force applied to a contactless force sensor, directly using the magnetic device.