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    Using Quantum Physics to Secure Wireless Devices

    April 26, 2023, Categories  Technology/Electronics, Physics

    Using quantum physics to secure wireless devices
    Physically unclonable function (PUF) based cryptographic keys generated by the PT-symmetric electronic system. a Illustration of the PUF-enabled secure radio-frequency (RF) authentication and communication. b Generation of the challenge-response pair (CRP) and the cryptographic key in the proposed PUF system. Our experiments utilize the pulse excitation shown in the left panel of b, and the response, represented by the transient voltage signal measured across the reader’s capacitor, and its discretized form are shown in the middle and right panels of b, respectively. After proper sampling and processing, the analog response is converted to a digital key composed of a bitstring. Credit: Nature Communications (2023). DOI: 10.1038/s41467-023-36508-x

    From access cards and key fobs to Blu...

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    Asteroid’s Comet-like Tail Is Not made of Dust, solar observatories reveal

    April 26, 2023, Categories  Astronomy/Space

    The Large Angle and Spectrometric Coronagraph (LASCO) on the Solar and Heliospheric Observatory (SOHO) imaged asteroid Phaethon through different filters as the asteroid passed near the Sun in May 2022. On the left, the sodium-sensitive orange filter shows the asteroid with a surrounding cloud and small tail, suggesting that sodium atoms from the asteroid’s surface are glowing in response to sunlight. On the right, the dust-sensitive blue filter shows no sign of Phaethon, indicating that the asteroid is not producing any detectable dust.
    Credits: ESA/NASA/Qicheng Zhang

    A weird asteroid has just gotten a little weirder.

    We have known for a while that asteroid 3200 Phaethon acts like a comet...

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    Team discovers Near-Universal T cell Immunity towards a Broad Range of Bacteria

    April 26, 2023, Categories  Health/Medical, Biology/Biotechnology

    Neutralizing the bacterially derived cytotoxic bomb: the pneumococci lie in the background, an array of macrophages and dendritic cells are arranged around the central image of a T cell. Rows of TCRs interacting with the identified pneumolysin epitope bound to HLA (white) cross the length and breadth of the artwork, emphasising their centrality in the immune response. Artwork by Dr. Erica Tandori.
    Neutralizing the bacterially derived cytotoxic bomb: the pneumococci lie in the background, an array of macrophages and dendritic cells are arranged around the central image of a T cell. Rows of TCRs interacting with the identified pneumolysin epitope bound to HLA (white) cross the length and breadth of the artwork, emphasising their centrality in the immune response. Artwork by Dr. Erica Tandori.

    Typically T cells of the immune system respond to a specific feature (antigen) of a microbe, thereby generating protective immunity. As reported in the journal Immunity, an international team of scientists have discovered an exception to this rule...

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    New Materials will Yield Stronger, Faster-Charging Batteries

    April 26, 2023, Categories  Chemistry/Nanotechnology

    New materials will yield stronger, faster-charging batteries
    Graphical abstract. Credit: Joule (2023). DOI: 10.1016/j.joule.2023.03.011

    Researchers at MIT say they have created a new material that will pave the way to faster charging batteries.

    Increasing demand for improved electrochemical energy storage devices—that is, batteries—stems from a broad spectrum of technology. That includes electric vehicles, municipal power backup systems that require uninterrupted power during temporary outages, and various other applications in the agricultural, biomedical and defense sectors.

    More efficient batteries will contribute to increasing demands for a greener, sustainable future.

    But state-of-the-art battery technology suffer from a few drawbacks. One is the length of time required to recharge batteries...

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