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    Category Physics

    New AI model can estimate a person’s true biological age from five drops of blood

    March 18, 2025, Categories  Physics, Technology/Electronics

    Top Left: A small blood sample is analyzed to measure 22 key steroids, and the data is fed into an AI system to calculate biological age. Top Right: The AI-predicted biological age (BA) shows a general correlation with chronological age (CA), but individual differences widen over time. Bottom: Using the metaphor of a “river widening as it flows downstream,” the illustration visualizes how biological age evolves with the passage of time. Credit: Zi Wang

    We all know someone who seems to defy aging—people who look younger than their peers despite being the same age. What’s their secret? Scientists at Osaka University (Japan) may have found a way to quantify this difference...

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    Holograms with a twist: Entangling light and information

    March 16, 2025, Categories  Physics, Technology/Electronics

    Quantum holograms using polarized light and metasurfaces enable precise control over entangled holographic information, advancing practical applications in quantum communication and anticounterfeiting technologies

    Quantum entanglement is a fundamental phenomenon in nature and one of the most intriguing aspects of quantum mechanics. It describes a correlation between two particles, such that measuring the properties of one instantly reveals those of the other, no matter how far apart they are. This unique property has been harnessed in applications such as quantum computing and quantum communication.

    A common method for generating entanglement is through a nonlinear crystal, which produces photon pairs with entangled polarizations via spontaneous parametric down-conversion (SPDC)...

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    Ultra-broadband photonic chip boosts optical signals to reshape high-speed data transmission

    March 13, 2025, Categories  Physics, Technology/Electronics

    Ultra-broadband photonic chip boosts optical signals
    A focus-stacked macro photograph of a fabricated gallium phosphide photonic chip featuring multiple spiral waveguides and other test structures. The chip width is just 0.55 cm across. Due to the high Kerr nonlinearity of gallium phosphide, its high refractive index, and its negligible two-photon absorption, extremely efficient optical parametric amplification and frequency conversion over S, C, and L optical communication bands are achieved using this chip. Credit: Nikolai Kuznetsov (EPFL).

    Modern communication networks rely on optical signals to transfer vast amounts of data. But just like a weak radio signal, these optical signals need to be amplified to travel long distances without losing information.

    The most common amplifiers, erbium-doped fiber amplifiers (EDFAs), have served...

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    Nature-inspired 3D-printing method shoots up faster than bamboo

    March 13, 2025, Categories  Physics, Chemistry/Nanotechnology, Biology/Biotechnology

    A simple, energy-efficient 3D-printing process takes its cues from trees to manufacture polymers quickly and inexpensively. Charging forward at top speed, a garden snail slimes up 1 millimeter of pavement per second. By this logic, Beckman Institute for Advanced Science and Technology researchers’ new 3D printing process speeds past existing methods — at a snail’s pace.

    Researchers in Beckman’s Autonomous Materials Systems Group created “growth printing,” which mimics tree trunks’ outward expansion to print polymer parts quickly and efficiently without the molds and expensive equipment typically associated with 3D printing. Their work appears in the journal Advanced Materials.

    “Humans are incredibly talented at making things...

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