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Nanotechnology Now - Press Release: Oregon scientists create mechanism to precisely control soundwaves in metamaterials: Theoretical modeling shows that designer materials incorporating drum-like membranes allow precise stoppage and reversal of sound pulses

Oregon scientists create mechanism to precisely control soundwaves in metamaterials


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EUGENE, Ore. April 16, 2021 University of Oregon physicists have developed a new method to manipulate sound stop it, reverse it, store it and even use it later in synthetic composite structures known as metamaterials.
The discovery was made using theoretical and computational analysis of the mechanical vibrations of thin elastic plates, which serve as the building blocks for the proposed design. The physicists, Pragalv Karki and Jayson Paulose, also developed a simpler minimal model consisting of springs and masses demonstrating the same signal manipulation ability.
There have been a lot of mechanisms that can guide or block the transmission of sound waves through a metamaterial, but our design is the first to dynamically stop and reverse a sound pulse, said Karki, a postdoctoral researcher in the UO s Department of Physics and Institute for Fundamental Science. ....

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Oregon researchers find that like adults, children by age 3 prefer seeing fractal patterns


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IMAGE: A fractal inspired carpet designed by Richard Taylor and his University of Oregon colleagues is underfoot during a reception in a Chicago building. A new study by UO psychologists working.
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Credit: Photo by Richard Taylor
EUGENE, Ore. Dec. 11, 2020 By the time children are 3 years old they already have an adult-like preference for visual fractal patterns commonly seen in nature, according to University of Oregon researchers.
That discovery emerged among children who ve been raised in a world of Euclidean geometry, such as houses with rooms constructed with straight lines in a simple non-repeating manner, said the study s lead author Kelly E. Robles, a doctoral student in the UO s Department of Psychology. ....

Ihab Elzeyadi , Richard Taylor , Margaret Sereno , Kellye Robles , Department Of Psychology , Integrative Perception Lab , Uo Department Of Physics , Uo Department Of Psychology , Sciences Communication , Minds Lab , University Of Oregon , Uo Department Of Architecture , Social Sciences , Penny Knight Campus , Accelerating Scientific Impact , Nicole Liaw , Dare Baldwin , Acquiring Minds , ரிச்சர்ட் டெய்லர் , மார்கரெட் செரினோ , கெளிலயே ரோபிள்ஸ் , துறை ஆஃப் உளவியல் , ஒருங்கிணைந்த கருத்து ஆய்வகம் , ஊஓ துறை ஆஃப் இயற்பியல் , ஊஓ துறை ஆஃப் உளவியல் , அறிவியல் தொடர்பு ,