The American Recovery and Reinvestment Act of 2009, otherwise known as the Stimulus, provides nearly $800 billion to revive the US economy. At 407 pages, the act itself is huge. To get a visual overview of where all the money will go, visit Stimulus Spending Programs, an interactive graphic created by the Hive Group, an information technology consulting firm.
Milton Abramowitz and Irene Stegun’s Handbook of Mathematical Functions made its debut in 1964 and has been serving physicists and other scientists ever since. As a US government publication, the book has always been in the public domain. Google has scanned the text and made it freely available. In case you’re wondering, the image shows Γ(z).
The Orange County Center for Contemporary Art in Santa Ana, California, recently put on The Art of Imaging , an exhibition of works that use medical images as main components. MRI, ultrasound, and other imaging modalities were represented at the show, which you can still sample at the exhibition’s website.
More about the authors
Charles Day,
American Center for Physics, One Physics Ellipse, College Park, Maryland 20740-3842, US
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The finding that the Saturnian moon may host layers of icy slush instead of a global ocean could change how planetary scientists think about other icy moons as well.
Modeling the shapes of tree branches, neurons, and blood vessels is a thorny problem, but researchers have just discovered that much of the math has already been done.
January 29, 2026 12:52 PM
This Content Appeared In
Volume 62, Number 4
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