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Electronics

WORM display lets you write with light

Scientists at Universiti Malaysia Pahang (UMP) have developed displays that can be written on and erased with light. The WORM (Write Once Read Many) display is an optical storage device whose molecular geometry can be altered by shining light on it, allowing information in the form of words or pictures to be impressed on it in as little as 20 seconds. The environmentally-friendly display is also easy to dispose of, the researchers report, as users only have to scratch its surface to remove its protective coating and dip it in water to dissolve it. Read More

Medical

LEDs may replace magnetism and radiation for neuroimaging

When doctors want to monitor someone's brain activity, they generally use either functional magnetic resonance imaging (fMRI) or positron emission tomography (PET). One subjects the patient to strong magnetic fields, while the other involves radiation exposure. Scientists at Washington University in St. Louis, however, have recently had success using diffuse optical tomography (DOT). Although it may look kind of extreme, it basically just involves shining LEDs into the subject's head. Read More

Science

Crystal-forming microparticles could lead to color-changing tanks and planes

Military vehicles that change color to be dark at night, and camo-green in the daylight ... could such a thing be possible? Well, it's certainly closer to reality, thanks to research being conducted at the University of Michigan. Scientists there have created a solution that changes color when exposed to light, then changes back when the light is removed. If incorporated into a thin film coating, the result could be chameleon-like surfaces. Read More

Electronics

BAE Systems develops a flat lens that acts like it's curved

Anyone who’s ever needed a pair of thick eyeglasses has a firm idea that lenses are the one thing where form follows function. However, BAE Systems and Queen Mary’s School of Electronic Engineering and Computer Science in London have put paid to that idea with a flat lens that works like a conventional curved lens, yet without any reduction in bandwidth performance. Using a combination of composite metamaterials and transformational optics for the first time, they have created a lens that's able to bend electromagnetic waves, yet isn't bound by its shape for its function. Read More

Good Thinking

Rooftop panels could bring more light to shady alleyways

Everyone knows that downtown alleyways are dark at night, but even in the daytime, shadows cast by the tall buildings on either side can make them quite gloomy. While that might not matter much for little-used alleys, it's certainly a factor in cities where people live and work in them. That's why researchers from Egypt's Ain Shams University are developing a new type of panel that diverts sunlight from buildings' roofs down into the alleyways beside them. Read More

Space

JPL develops space flowers to help find Earth-like planets

Apparently NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, thinks that what space exploration in the 21st century needs is spacecraft that are a bit more botanical. The center has released a video showing off its starshade spacecraft that opens up like a blossom. Bearing a resemblance to a cosmic sunflower, it’s designed to help astronomers to directly study exoplanets, including taking the first actual pictures of planets beyond our Solar System.Read More

Science

Solar cell material that can absorb light during the day and emit light at night

When looking for the best materials with which to construct a solar cell, the obvious preference is for one that absorbs light, not emits it. But researchers from Nanyang Technological University in Singapore have discovered a material that does both. Amongst a variety of potential applications, the researchers say the material, Perovskite, opens up the possibility of mobile devices with displays that double as solar cells.Read More

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