RSS feed source: National Science Foundation
A new study supported by the U.S. National Science Foundation shows, for the first time, how heat moves — or rather, doesn’t — between materials in a high-energy-density plasma state. The work is expected to provide a better understanding of inertial confinement fusion experiments, which aim to reliably achieve fusion ignition on Earth using lasers. How heat flows between a hot plasma and a material’s surface is also important in other technologies, including semiconductor etching and vehicles that fly at hypersonic speeds.
High-energy-density plasmas are produced only at extreme pressures and temperatures. The study shows that interfacial thermal resistance, a phenomenon known to impede heat transfer in less extreme conditions, also prevents heat flow between different materials in a dense, super-hot plasma state. The research is published in Nature Communications and was led by Thomas White, a physicist at the University of Nevada, Reno, and his former doctoral student, Cameron Allen. White is a recipient of an NSF Faculty Early Career Development grant.
“Understanding how energy flows across a boundary is a fundamental question, and this work provides us with new insights into how this happens in the exceptionally energy-dense environments that one finds inside of stars and planetary cores,” says Jeremiah Williams, a program director for the NSF Plasma Physics program.
RSS feed source: National Science Foundation
In-brief analysis
May 1, 2025
Data source: CME Group, Bloomberg L.P.
Note: Refinery margin is calculated as the 3-2-1 crack spread on the U.S. Atlantic Coast, which represents two barrels of gasoline and one barrel of distillate fuel oil minus three barrels of Brent crude oil. 1Q25=first quarter of 2025
During the first quarter of 2025 (1Q25), crude oil prices generally decreased while U.S. refinery margins initially increased before decreasing in the final month of the quarter. In this quarterly update, we review petroleum markets price developments in 1Q25, covering crude oil prices, refinery margins, biofuel compliance credit prices, and natural gas plant liquids prices.
Crude oil prices
After reaching a quarterly high of $82 per barrel (b) on January 15, crude oil prices generally declined through the end of the first quarter, settling at $75/b
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RSS feed source: National Science Foundation
In-brief analysis
April 30, 2025
Data source: Evaluate Energy
Note: Production expenses include costs of goods sold, operating expenses, and production taxes from company income statements. Interest expenses are in 2024 dollars and deflated using the Consumer Price Index.
Higher oil prices, increased drilling efficiency, and structurally lower debt needs have contributed to lower interest expenses for some publicly traded U.S. oil companies over the past decade, despite the level of interest rates across the economy being relatively high.
Based on the published financial reports of 26 U.S. publicly traded oil companies, interest expenses per barrel of oil equivalent (BOE)—a measure that accounts for crude oil, hydrocarbon gas liquids, and natural gas production—in 2024 were about $1.50/BOE, or around 6% of production expenses. In real dollar terms and as a share of production expenses, interest
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RSS feed source: National Science Foundation
Imagine what life would be like without GPS, something you use all the time without thinking about where it came from. NIST research helped bring you GPS and many other important technologies.
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