Posts tagged science
Neurally Controlled Prosthetics
In less than 10 years, Darpa’s Revolutionizing Prosthetics program has transformed artificial limbs. Prosthetic arms, like the DEKA model, are already wired to respond to toe movements. Next up? Arms that are fully integrated with a wearer’s neural signals.
A collaboration led by Johns Hopkins researchers will start human trials on their Modular Prosthetic Limb this year. Micro-arrays are implanted into the brain, allowing a user to operate the prosthetic — which includes 22-degrees of motion, independent finger movement and weighs only 9 pounds — with their thoughts alone.
this is profound. what an incredible step in the evolution of prosthetics.
It may not be a Double Rainbow, but it’s a Lunar Rainbow!
How could this be possible? it doesn’t rain there. The Moon doesn’t even have an atmosphere…so how could the Lunar Reconnaissance Orbiter’s camera capture this phenomenal phenomenon?
The LROC’s Wide Angle Camera uses filters to capture images, capturing three different wavelengths: a 689nm filter for red, a 643nm filter for green, and a 604nm filter for blue. To get one image, the spacecraft’s camera shoots three quickly consecutive images, which are then combined by the computer to create one single image.
When the Sun is directly overhead the Lunar surface, with the LRO in between, a phenomenon called “opposition surge” happens—a sudden increase in the surface brightness, with no shadows on the surface. As the light reaches the LROC’s camera, it interferes with itself. And as this happens, the filters change, capturing the shining at sightly different moments. When the software combines the resulting images, you can observe the light shifting in the form of a rainbow.
According to Brett Denevi at the LROC blog, the images “provide a huge new dataset for studying how light interacts with a particulate surface at different wavelengths. Perhaps an esoteric-sounding field of study, but this data can help us understand the reflectance images and spectra we have of the Moon and other bodies throughout the Solar System.”
“ Science is but a perversion of itself unless it has, as its ultimate goal the betterment of humanity.”