Tech
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Sound power for deep-space travel beyond sun’s reach
An unusually efficient new type of power unit for spacecraft uses sound to convert heat to electricity.
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Ocean Envy
By mimicking the flippers of penguins, whales, and dolphins, engineers hope to make ocean vessels that are as maneuverable and efficient as the marine animals.
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A new deep-sea submersible
Scientists have announced a 4-year, $21.6-million design-and-construction effort to replace the aging research submersible Alvin.
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Aerodynamics for Beginners
NASA’s Glenn Research Center offers an extensive online tutorial on the basics of aerodynamics. Aimed at elementary and high school teachers, the site provides lots of useful information and has slides and worksheets suitable for classroom use at various levels. Go to: http://www.grc.nasa.gov/WWW/K-12/airplane/bga.html
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Neutrons may spotlight cancers
Researchers have taken a first step toward developing neutron beams as a medical diagnostic tool that might provide earlier detection of cancers.
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When the Chips are Down
Scientists seek alternatives to a computer technology nearing its limits.
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Novel sensing system catches the dud spud
A new device can detect a single potato that's infected with bacterial soft rot while buried deep in a storage crate with hundreds of healthy tubers.
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Lighting the Way for Water: New strategy for steering drops with finesse
Using a beam of ultraviolet light, researchers manipulate tiny drops of water on a surface—a demonstration that could lead to ultrafast and highly precise chemical reactions on a chip.
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Quantum dots light up cancer cells in mice
Brightly fluorescent crystals known as quantum dots have the potential to seek out cancerous cells in the body, a trick that could lead to highly precise cancer screening.
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Nanorods go for the gold
Gold blobs grown onto the ends of tiny, rod-shaped crystals provide potential points for electric contact and chemical liaisons that could enable such semiconductor bits to self-organize into complex circuits or structures.
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Sweet Frequency: Implantable glucose sensor transmits data wirelessly
Modeled after antitheft magnetic strips, a new implantable glucose sensor for diabetes patients could do away with daily pinprick tests.
