Category: 4. Physics

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  • 3D/4D imaging of complex and deformed microstructures with pink-beam dark field X-ray microscopy

    3D/4D imaging of complex and deformed microstructures with pink-beam dark field X-ray microscopy

    Experimental setup

    In the monochromatic DFXM configuration21 (Fig. 1a), the undulator beam is first reflected by a double multilayer monochromator (DMM) before being refined by a channel-cut Si(111) monochromator (CCM), selecting a highly…

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  • Multidimensional social signature de-anonymizes low-sensitivity data

    Multidimensional social signature de-anonymizes low-sensitivity data

    Datasets

    Email Dataset. Anonymous internal email communication data from a European research institution, represented as directed edges (u, v, t) where user u sent an email to user v at time t51.

    Wiki Dataset. Temporal network data capturing…

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  • Acoustic generation of orbital currents

    Acoustic generation of orbital currents

    Orbital torque and orbital pumping

    The devices used in this study are Ti(tTi)/Ni(tNi) bilayers, with the surface of the Ni layer covered by a SiN(3 nm) layer, where the values in parentheses represent the thickness of each layer. The films were…

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  • All-optically controlled phased-array for ultrasonics

    All-optically controlled phased-array for ultrasonics

    The architecture of the light-activated pixel element in the OPAT is presented in Fig. 2A. We have used the circuit to drive transducers at 0.7 MHz and at 2.25 MHz. For the latter, we used lead zirconate titanate (PZT) piezoelectric disks as…

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  • Radio-frequency sensor for non-destructive evaluation of composite materials

    Radio-frequency sensor for non-destructive evaluation of composite materials

    Microwave spectroscopy is a powerful technique for characterizing the electromagnetic properties of materials by analyzing their response to microwave signals. This technique is particularly useful for analyzing dielectric and conductive…

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  • Dynamic caustics by ultrasonically modulated liquid surface

    Dynamic caustics by ultrasonically modulated liquid surface

    In optics, caustics is defined as “the envelope of light rays that have been reflected or refracted by a curved surface or object, or the projection of that envelope of rays on another surface”1. When light enters an object with a high…

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  • Simulations of Mpemba effect in water and Lennard-Jones models

    Simulations of Mpemba effect in water and Lennard-Jones models

    A hotter sample of water may freeze faster, than a colder one, when kept inside a refrigerator working at a subfreezing temperature1,2,3,4,5. This counterintuitive fact is now referred to as the Mpemba Effect (ME)6 and discussed since the time of…

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