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An international research team has developed mechanical metamaterials with a high elastic energy density. Highly twisted rods that deform helically provide these metamaterials with a high stiffness and enable them to absorb and release large amounts of elastic energy. The researchers conducted simple compression experiments to confirm the initial theoretical results.

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In-brief analysis

April 2, 2025

Data source: U.S. Energy Information Administration, Form EIA-851A, Domestic Uranium Production Report (Annual), and Form EIA-851Q, Domestic Uranium Production Report (Quarterly)
Note: Data were withheld from second-quarter 2020 to second-quarter 2021. P=preliminary data; W=withheld

Companies in the United States produced more uranium concentrate in 2024 than in any year since 2018 after a sustained period of higher uranium prices spurred production, according to our recently published Domestic Uranium Production Report—Quarterly. The increase largely came from two in-situ recovery facilities, one in Texas and one in Wyoming, and the resumption of uranium production at White Mesa Mill in Utah, the only operational uranium mill in the United States. Production in the fourth quarter of 2024 alone was higher than the total annual production for each of the years in 2019–23.

Energy Fuels’

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Aalto University is where science and art meet technology and business. We shape a sustainable future by making research breakthroughs in and across our disciplines, sparking the game changers of tomorrow and creating novel solutions to major global challenges. Our community is made up of 120 nationalities, 14 000 students, 400 professors and close to 5000 other faculty and staff working on our dynamic campus in Espoo, Greater Helsinki, Finland. Diversity is part of who we are, and we actively work to ensure our community’s diversity and inclusiveness. This is why we warmly encourage qualified candidates from all backgrounds to join our community.

The School of Electrical Engineering is one of the six schools of Aalto University. Our portfolio covers fields from natural sciences to engineering and information sciences. In parallel with basic research, we develop ideas and technologies further into innovations and services.

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