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    A Bio-inspired Mechano-Photonic Artificial Synapse

    March 29, 2021, Categories  Physics, Health/Medical, Biology/Biotechnology

    A bioinspired mechano-photonic artificial synapse
    Biological tactile/visual neurons and mechano-photonic artificial synapse. (A) Schematic illustrations of biological tactile/visual sensory system. (B) Schematic diagram of the mechano-photonic artificial synapse based on graphene/MoS2 (Gr/MoS2) heterostructure. (i) Top-view scanning electron microscope (SEM) image of the optoelectronic transistor; scale bar, 5 μm. The cyan area indicates the MoS2 flake, while the white strip is graphene. (ii) Illustration of charge transfer/exchange for Gr/MoS2 heterostructure. (iii) Output mechano-photonic signals from the artificial synapse for image recognition. Credit: Science Advances, doi: 10.1126/sciadv.abd9117

    Multifunctional and diverse artificial neural systems can incorporate multimodal plasticity, memory and supervised learning functions ...

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    Supernova Simulations reveal how Stellar Explosions Shape Debris Clouds

    March 29, 2021, Categories  Astronomy/Space

    image of a supernova
    A supernova creates a cloud of debris that bears an imprint of the explosion. In this visualization of the simulation data, one quarter of the remnant’s outer shell has been removed to reveal the clumps of matter within (colors denote different materials). Credit: Reproduced from Ref. 1 by permission of the AAS.

    Astronomers are now in a better position to interpret observations of supernova remnants thanks to computer simulations of these cataclysmic events by RIKEN astrophysicists.

    When certain types of stars die, they go out in a blaze of glory—an incredibly powerful explosion known as a supernova. One of the most common forms of supernova, typeIa, starts with a dense white dwarf star that has burned up its hydrogen fuel...

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    New Class of Versatile, High-Performance Quantum Dots Primed for Medical Imaging, Quantum Computing

    March 27, 2021, Categories  Health/Medical, Physics

    A new, highly versatile class of quantum dots excel as single-photon emitters, with applications in biomedical imaging, quantum communication, cybersecurity, and many other fields. Zachary (Zack) Robinson (left) and Vladimir Sayevich (right) are part of the team that has developed these infrared-emitting quantum dots.

    A new class of quantum dots deliver a stable stream of single, spectrally tunable infrared photons under ambient conditions and at room temperature, unlike other single photon emitters. This breakthrough opens a range of practical applications, including quantum communication, quantum metrology, medical imaging and diagnostics, and clandestine labeling.

    “The demonstration of high single-photon purity in the infrared has immediate utility in areas such as quantum key di...

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    Sun. Astrophysicists Simulate Microscopic Clusters from the Big Bang

    March 27, 2021, Categories  Astronomy/Space

    The very first structures in the Universe
    The results of the simulation show the growth of tiny, extremely dense structures very soon after the inflation phase of the very early universe. Between the initial and final states in the simulation (top left and right respectively), the area shown has expanded to ten million times its initial volume, but is still many times smaller than the interior of a proton. The enlarged clump at the bottom left would have a mass of about 20kg. Credit: Jens Niemeyer, University of Göttingen

    The very first moments of the Universe can be reconstructed mathematically even though they cannot be observed directly. Physicists from the Universities of Göttingen and Auckland (New Zealand) have greatly improved the ability of complex computer simulations to describe this early epoch...

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