Saturday, June 30, 2018
Wednesday, June 27, 2018
Fwd: Infared stealth blanket
Less than one millimeter thick, the sheet absorbs approximately 94 percent of the infrared light it encounters. Trapping so much light means that warm objects beneath the cloaking material become almost completely invisible to infrared detectors.
Importantly, the stealth material can strongly absorb light in the so-called mid- and long-wavelength infrared range, the type of light emitted by objects at approximately human body temperature.
To trap infrared light, Jiang and colleagues turned to a unique material called black silicon, which is commonly incorporated into solar cells
https://www.sciencedaily.com/
Fwd: Using wireless signals to set humans through walls
MIT has given a computer x-ray vision, but it didn't need x-rays to do it. The system, known as RF-Pose, uses a neural network and radio signals to track people through an environment and generate wireframe models in real time. It doesn't even need to have a direct line of sight to know how someone is walking, sitting, or waving their arms on the other side of a wall.
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