Abstract: A method and a system for generating a time-frequency representation of an aperiodic continuous input signal comprising generating a periodic train of short pulses having a repetition frequency, and sampling the signal temporally using the periodic train of short pulses to obtain a temporally sampled signal, the temporally sampled signal comprising a plurality of sampled copies of the input signal, each sampled copy being spaced in function of the repetition frequency of the periodic train of short pulses. The temporally sampled signal is delayed based on the repetition frequency to obtain a delayed temporally sampled signal comprising a plurality of delayed sampled copies, a spectral representation of a given delayed sampled copy being delayed in function of the repetition frequency. The delayed temporally sampled signal is evaluated over consecutive time slots to obtain, for each consecutive time slot, a respective output signal in the time-frequency domain.

Abstract: There is provided a dual-frequency LIDAR system for determining a distance and velocity of a target and a method of operating the same. The system includes tunable lasers operable to generate a first signal, a second signal, and a third signal having a phase noise below the phase of the first signal. The system includes at least one coupler operable to: couple the first and second signal for directing a transmission signal on the target, couple a backscattered signal and the third signal to obtain a received signal, and couple the transmission signal and the third signal to obtain a reference signal. Digital processing techniques are used to determine the distance of the target by estimating a time delay between the transmission and reference signals via cross-correlation. The velocity is obtained by estimating a Doppler-frequency shift based on the time delay, the received signal and the transmission signal.

Abstract: A transmission electron microscopy system for imaging a sample, comprising: a pulse generator for generating an initial electron pulse towards the sample, the initial electron pulse to be propagated through the sample to obtain a transmitted electron pulse; an encoding device for encoding the transmitted electron pulse according to a predefined pattern to obtain an encoded electron pulse; a shearing device for temporally shearing the encoded electron pulse in a given direction to obtain a given electron pulse; a detector for detecting the given electron pulse to obtain a single image of the sample; and a datacube generator for determining a spatiotemporal datacube from the single image using the predefined pattern, and outputting the spatiotemporal datacube.

Abstract: A method and a system for generating a time-frequency representation of an aperiodic continuous input signal comprising generating a periodic train of short pulses having a repetition frequency, and sampling the signal temporally using the periodic train of short pulses to obtain a temporally sampled signal, the temporally sampled signal comprising a plurality of sampled copies of the input signal, each sampled copy being spaced in function of the repetition frequency of the periodic train of short pulses. The temporally sampled signal is delayed based on the repetition frequency to obtain a delayed temporally sampled signal comprising a plurality of delayed sampled copies, a spectral representation of a given delayed sampled copy being delayed in function of the repetition frequency. The delayed temporally sampled signal is evaluated over consecutive time slots to obtain, for each consecutive time slot, a respective output signal in the time-frequency domain.

Abstract: A transmission electron microscopy system for imaging a sample, comprising: a pulse generator for generating an initial electron pulse towards the sample, the initial electron pulse to be propagated through the sample to obtain a transmitted electron pulse; an encoding device for encoding the transmitted electron pulse according to a predefined pattern to obtain an encoded electron pulse; a shearing device for temporally shearing the encoded electron pulse in a given direction to obtain a given electron pulse; a detector for detecting the given electron pulse to obtain a single image of the sample; and a datacube generator for determining a spatiotemporal datacube from the single image using the predefined pattern, and outputting the spatiotemporal datacube.

Abstract: In a general aspect, a chirped optical pulse is compressed by operation of diffraction gratings and a dispersive mirror having a smooth reflective surface. In some aspects, a chirped pulse laser system includes a programmable optical dispersive filter (PODF) operable to modify a spectral phase of optical pulses and a pulse compressor that receives an optical pulse based on an output of the PODF. The pulse compressor includes optical elements in a vacuum chamber. The optical elements define an optical path through the pulse compressor, and are arranged to disperse the optical pulse in the optical path. The optical elements include diffraction gratings and a dispersive mirror, which has a smooth reflective surface that defines a portion of the optical path.

Abstract: The invention relates to a method for generating a focused charged-particle beam, comprising at least the steps of: a) generating a charged-particle beam (10); b) emitting a laser pulse (40); c) generating a focusing magnetic field structure in a target (50) by means of an interaction between the laser pulse and the target; and d) making the charged-particle beam penetrate the focusing magnetic field structure at least partially.

Abstract: Processes, methods, system and uses in relation to chemical sequestration of carbon dioxide from a carbon dioxide containing gas by carbonation of an alkaline earth metal containing material. The carbon dioxide containing gas is contacted with an aqueous slurry in a carbonation unit for carbonation of at least a portion of the alkaline earth metal to produce a carbon dioxide depleted gas and a carbonate loaded slurry which is substantially exempt of precipitated alkaline earth. metal carbonates. The carbonate loaded slurry is then separated into an aqueous phase and a solid phase; and the aqueous phase is supplied to a precipitation unit for precipitating alkaline earth metal carbonates. The carbonation stage may be performed at a carbonation temperature between about 10° C. and about 40° C. and a carbonation pressure between about 1 bar and about 20 bars. The solid phase may be recycled to the carbonation stage.

Abstract: The present document describes a process and a bioreactor for reducing a bisphenol compound content of a wastewater using a membrane bioreactor containing a biomass in a volatile suspended solid (VSS) form where the biomass in the membrane bioreactor is operating continuously to reduce bisphenol compound content when the bisphenol compound volumetric load is below 108 g m?3 d?1.

Abstract: There is described a passive variable emittance device comprising: a substrate having a receiving surface adapted to reflect radiations having a given wavelength; an intermediary layer deposited on the receiving surface of the substrate and being substantially transparent to the radiations having the given wavelength; and a thermochromic layer deposited on top of the intermediary layer, the thermochromic layer being substantially transparent to the radiations having the given wavelength for a first temperature below a given transition temperature, and presenting both reflection and absorption for the radiations for a second temperature above the given transition temperature, a total optical thickness for the intermediary and thermochromic layers being substantially equal to one quarter of the given wavelength so that radiations reflected by the thermochromic layer at the second temperature destructively interfere with radiations transmitted by the thermochromic and intermediary layers and reflected by the sub

Abstract: A solar cell comprising a semiconductor solar cell of a first band gap; a buffer layer formed on a surface of the semiconductor solar cell; and at least one layer of a multiferroic or a ferroelectric material formed on the buffer layer; wherein the at least one layer of a multiferroic or a ferroelectric material has a second bang gap, the first band gap being smaller than the second band gap.

Abstract: There is described a passive variable emittance device comprising: a substrate having a receiving surface adapted to reflect radiations having a given wavelength; an intermediary layer deposited on the receiving surface of the substrate and being substantially transparent to the radiations having the given wavelength; and a thermochromic layer deposited on top of the intermediary layer, the thermochromic layer being substantially transparent to the radiations having the given wavelength for a first temperature below a given transition temperature, and presenting both reflection and absorption for the radiations for a second temperature above the given transition temperature, a total optical thickness for the intermediary and thermochromic layers being substantially equal to one quarter of the given wavelength so that radiations reflected by the thermochromic layer at the second temperature destructively interfere with radiations transmitted by the thermochromic and intermediary layers and reflected by the sub

Abstract: A laser system comprises a high-Q nonlinear optical resonator, a cavity comprising an amplifying element and a dispersive element, an optical delay line adapted to tune the length of the cavity, and a large pass-band filter adapted to tune the cavity's central oscillation wavelength, the nonlinear optical resonator being selected with a linewidth (LWR) comparable to the cavity free-spectral range (FSRC). There is provided a method for generating highly stable pulse streams, comprising providing a cavity comprising an amplifying element and a dispersive element; selecting a high-Q nonlinear optical resonator with a linewidth (LWR) comparable to the cavity free-spectral range (FSRC); tuning the length of the cavity; and tuning the cavity's central oscillation wavelength.

Abstract: A method for generating an ultrashort charged particle beam, comprising creating a high intensity longitudinal E-field by shaping and tightly focusing, in an on-axis geometry, a substantially radially polarized laser beam, and using the high intensity longitudinal E-field for interaction with a medium to accelerate charged particles.

Abstract: A method for producing nanostructured coatings on a substrate, comprising: preparing a nanocrystalline powder of a powder size comprised between 1 and 60 ?m; and combining cleaning the surface of the substrate and cold spraying the nanocrystalline powder on the surface of the substrate, and a system for producing nanocrystalline coatings on a substrate, comprising a spray head, a cleaning head and a handling system monitoring the spray head and the cleaning head relative to the substrate to be coated, the spray head being a first cold spray head, the first cold spray head depositing on the substrate at least one nanocrystalline powder, the cleaning head optimizing the surface being coated with the at least one layer of nanocrystalline powder.

Abstract: A process for decontaminating a medium polluted with metals and hydrophobic organic compounds (HOC) includes providing an acidic slurry of water, acid, chloride salt, surfactant, and the polluted medium. Flotation is preformed on the acidic slurry to form a HOC-rich froth and an HOC-depleted slurry and the froth is recovered. The slurry is separated to obtain a treated solid and a liquid effluent rich in metallic ions. Preferably, the process also includes recuperating the metals by chemical precipitation and/or electrodeposition to produce a treated solution. Also provided are a decontaminant having an acid, a chloride salt, and a surfactant as well as a chemical kit for decontaminating the polluted medium including the decontaminant in which the acid, chloride salt and surfactant can be mixed with polluted medium in the presence of water before removing at least a portion of the metals and HOC from the polluted medium.

Abstract: A method for preparation of highly porous and preferentially-oriented {100} platinum on a substrate by electrodeposition in a deposition bath, comprising using a deposition potential Edep lower than ERHE+150 mV and an acidified platinum salt solution having a Pt salt concentration less than 5.0 mmole L?1 or, in presence of hydrogen, comprising limiting the concentration of Pt salts in the electrolyte to less than 5.0 mmole L?1 and controlling the temperature of the electrolyte. Preferentially-oriented {100} platinum nanowires and thin films, comprising Pt{100} in a range between about 20 and about 60% and having a roughness factor of at least 50 are produced.

Abstract: A solar cell comprising a semiconductor solar cell of a first band gap; a buffer layer formed on a surface of the semiconductor solar cell; and at least one layer of a multiferroic or a ferroelectric material formed on the buffer layer; wherein the at least one layer of a multiferroic or a ferroelectric material has a second bang gap, the first band gap being smaller than the second band gap.

Abstract: The present document describes a process and a bioreactor for reducing a bisphenol compound content of a wastewater using a membrane bioreactor containing a biomass in a volatile suspended solid (VSS) form where the biomass in the membrane bioreactor is operating continuously to reduce bisphenol compound content when the bisphenol compound volumetric load is below 108 g m?3 d?1.

Abstract: A process for decontaminating a medium polluted with metals and hydrophobic organic compounds (HOC) includes providing an acidic slurry of water, acid, chloride salt, surfactant, and the polluted medium. Flotation is preformed on the acidic slurry to form a HOC-rich froth and an HOC-depleted slurry and the froth is recovered. The slurry is separated to obtain a treated solid and a liquid effluent rich in metallic ions. Preferably, the process also includes recuperating the metals by chemical precipitation and/or electrodeposition to produce a treated solution. Also provided are a decontaminant having an acid, a chloride salt, and a surfactant as well as a chemical kit for decontaminating the polluted medium including the decontaminant in which the acid, chloride salt and surfactant can be mixed with polluted medium in the presence of water before removing at least a portion of the metals and HOC from the polluted medium.