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    Compact phononic circuits guide sound at gigahertz frequencies for chip-scale devices

    September 22, 2025, Categories  Physics, Technology/Electronics

    Compact and reconfigurable phononic circuits that operate at gigahertz frequencies
    Topological phononic chip platform. a, Illustration of integrated devices that use topologically protected sound waves, including a phonon pump, an edge-waveguide, and an intensity modulator. b, Top: cross-section of the GaN-on-sapphire waveguide, showing its width (w) and thickness (h). Bottom: simulated vibration pattern of the main guided sound wave. c, Electron microscope image of the aluminum transducer used to generate 1.5 GHz phonons. d, Photo of the fabricated topological phononic chip. e, Diagram of the experimental setup, combining a custom optical vibrometer with a motorized stage to map how sound waves travel in the chip. Credit: Xu et al

    Compact phononic circuits guide sound at gigahertz frequencies for chip-scale devices

    Phononic circuits are emerging devices that can ...

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    Galaxies Reveal Hidden Maps of Dark Matter in the Early Universe

    September 21, 2025, Categories  Astronomy/Space

    Rutgers researchers uncover “fingerprints” that show how these cosmic systems expand and evolve

    A Rutgers-led team of scientists has uncovered evidence of how galaxies expand by tracing the invisible scaffolding of the universe created by a mysterious substance known as dark matter.

    In a newly published study in Astrophysical Journal Letters, researchers used what they said are the largest-ever samples of special galaxies called Lyman-alpha emitters to study how galaxies clumped together over billions of years. In doing so, they gained an improved understanding of how galaxies relate to the surrounding dark matter and how they evolve over time.

    “Analyzing these fingerprints gives us insight into the mass of dark matter surrounding the galaxies,” said Eric Gawiser, a Disti...

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    UC Davis Health study finds potential keys to reversing bone loss

    September 19, 2025, Categories  Biology/Biotechnology, Health/Medical

    Researchers uncover a key protein and a promising strategy to prevent bone damage from steroids

    The rheumatology and orthopedic researchers discovered that a protein called Basigin, which gets activated in stem cells when people take steroids, is a key reason why bones weaken and blood vessels in bone tissue become abnormal. By blocking Basigin, they were able to protect and even restore bone health in mice, suggesting a promising new treatment path.

    Their findings were published in Nature Communications.

    “This research is a major step forward in understanding how steroid treatments affect bone health,” said Thomas H. Ambrosi, assistant professor in the Department of Orthopedic Surgery and co-corresponding author of the study...

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    NASA’s Deep Space communications demo exceeds project expectations

    September 19, 2025, Categories  Astronomy/Space

    A wide-angle, long-exposure shot of an astronomical observatory on a hill at night. The dome glows with a faint green light against a deep purple and blue sky filled with stars. Dark silhouettes of pine trees are visible in the foreground.
    In this infrared photograph, the Optical Communications Telescope Laboratory at JPL’s Table Mountain Facility near Wrightwood, California, beams its eight-laser beacon to the Deep Space Optical Communications flight laser transceiver aboard NASA’s Psyche spacecraft.
     Credit: NASA/JPL-Caltech

    NASA’s Deep Space Optical Communications technology has successfully shown that data encoded in lasers can be reliably transmitted, received, and decoded after traveling millions of miles from Earth at distances comparable to Mars. Nearly two years after launching aboard the agency’s Psyche mission in 2023, the technology demonstration recently completed its 65th and final pass, sending a laser signal to Psyche and receiving the return signal from 218 million miles away.

    “NASA is setting Ame...

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