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Research & Technology News
Cloaked Tank Masquerades as Car (or Cow)
ÖRNSKÖLDSVIK, Sweden, Sept. 7, 2011 — A new invisibility “cloak” gives Harry Potter a run for his magic by giving a vehicle—even a moving one—the ability to blend into its surroundings or mimic other objects, such as a cow.
Light Screens for Heart Disease in Newborns
DURHAM, N.C., Sept. 7, 2011 — A screening technique helps identify congenital heart disease in newborn babies by using various wavelengths of light to measure blood oxygen levels. Levels that are too low are a warning sign and trigger further investigation, say physicians at...
Designer Light Creates Fun-House Mirror Effect
CAMBRIDGE, Mass., Sept. 2, 2011 — While studying the behavior of light on flat surfaces patterned with metallic nanostructures, researchers at the Harvard School of Engineering and Applied Sciences (SEAS) discovered a bizarre phenomenon that defies the laws of reflection and...
Universal Digital Quantum Simulation Realized
INNSBRUCK, Austria, Sept. 2, 2011 — Using a digital approach instead of the previous analog approach, physicists have successfully achieved universal quantum simulation in a system of trapped ions that can, in principle, simulate any physical system efficiently. The mathematical...
“Event cloaks” could be the perfect crime tool
LONDON – If you could pull off the ultimate bank heist without getting caught, would you try it? The perfect crime is possible – in principle – according to scientists at Imperial College London, who have described a new type of invisibility...
“Optics table on a chip” superpositions photons
GAITHERSBURG, Md. – A tiny, tunable superconducting circuit can place a single microwave photon in two frequencies simultaneously, potentially leading to the long-sought “optics table on a chip.” Researchers at the National Institute of Standards and...
13 mirrors polished for Webb telescope
GREENBELT, Md. – NASA has completed coating 13 of the James Webb Space Telescope’s 18 primary mirror segments, enabling the observatory to see objects as far away as the first galaxies in the universe. Mirrors are the most critical part of a telescope...
Computers mimic human perception of 3-D shapes
WEST LAFAYETTE, Ind. – In an effort to help machines see more like people do, two new techniques for computer-vision technology – heat mapping and heat distribution – have been developed to mimic how humans perceive 3-D shapes. The techniques apply...
High-speed imaging unveils fluid mysteries
LIÈGE, Belgium – Tibetan singing bowls have been used in religious ceremonies to produce rich, beautiful sounds. Now physicists are filling them with water and using them to quantify how droplets are propelled from the water’s surface as the bowls are excited....
Low-noise oscillator improves microwave signal stability
GAITHERSBURG, Md. – A new low-noise oscillator generates microwave signals more pure and stable than those from conventional electronic sources. The instrument could improve signal stability and resolution in radar, communications and navigation systems, and in certain...
Microspectrometer could solve lab-on-a-chip integration challenge
ATLANTA – To replace big, bulky, high-resolution spectrometers, scientists have developed a microspectrometer that uses resonators shaped like a compact disc to achieve high resolution. Spectrometers have conventionally been expensive, bulky benchtop...
Model IDs optimal paths in fiber optic networks
RALEIGH, N.C. – Fiber optic network designers must find the most efficient way to connect distant phones and computers – a costly and time-consuming process. But researchers at North Carolina State University have a model that they say finds optimal...
New facility delivers microsystem technology
DUISBURG, Germany – A new method that employs precise etching to produce miniaturized thermal imaging sensors promises to enable large-scale manufacturing of automotive safety devices. Because they see more than the naked eye, infrared cameras could improve...
One-atom-thick optical devices proposed
PHILADELPHIA – One-atom-thick metamaterials that can now be made by controlling the conductivity of sheets of graphene could have wide applications in imaging, signal processing and telecommunications. The study of metamaterials is based on the idea that...
Revealed: The private lives of electrons
PRINCETON, N.J. – Using laser light, scientists have looked into the complex relationship that develops between a single electron and its environment, known as a Kondo state. The break-through could aid the development of quantum computers. Scientists at Princeton...
Robot-human interactions improve with facial recognition
LONDON – Scientists studying facial expressions are investigating a way to create socially aware companion robots and graphical characters that could recognize human facial movements. Our brains pick up tiny, subtle clues about faces whenever we...
Spectrometer-on-a-chip shows young universe
GREENBELT, Md. – NASA scientists hoping to get a glimpse of the universe in its youth may finally do so using a revolutionary instrument on a chip called MicroSpec. Scientists know what the universe looked like when it was a baby and how it looks today, but...
Stressed sensor self-heals
RALEIGH, N.C. – A new fiber optic strain sensor can heal itself, which will help engineers collect data in the wake of earthquakes, explosions or other unexpected events and make informed decisions about structural safety. Strain sensors measure the force...
Supercarbon: “Denser than diamond”
STONY BROOK, N.Y. – Three newly discovered carbon structures may be at least three percent denser, more brilliant and better able to handle pressure than diamond can. Newly discovered modifications of carbon, such as graphene, have resulted in a scientific and...
Ultrafast lasers control metallic electrons
GARCHING, Germany – A technique that controls the motion of electrons using very fast laser pulses, first demonstrated using gaseous atoms or molecules, has been shown for the first time to work for electrons emitted from a solid metal tip. The results could allow...
Vision analysis estimates crop yields earlier
ADELAIDE, Australia – To predict how plants will react to the harsher environmental conditions expected under climate change, computer scientists at the University of Adelaide have developed an image-based analysis method for use by plant physiologists to determine crop...
Hard X-ray Technique Sees Below the Surface
BERKELEY, Calif., Aug. 31, 2011 — A new technique called HARPES (Hard x-ray Angle-resolved PhotoEmission Spectroscopy) can study electronic structures deep below the material surface, including buried layers and interfaces in nanoscale devices. Developed by Lawrence Berkeley...
Portable Microscope Uses Holograms Instead of Lenses
LOS ANGELES, Aug. 31, 2011 — A compact, lightweight, dual-mode microscope that uses holograms instead of lenses could prove to be a boon for global health initiatives. The palm-size device, developed at UCLA, costs only $50 to $100 to make. It features a transmission mode...
New LIGO Executive Director Named
PASADENA, Calif., Aug. 30, 2011 — David Reitze has been named executive director of the Laser Interferometer Gravitational-Wave Observatory (LIGO). A professor of physics at the University of Florida, Gainesville, and a visiting associate at Caltech since 2007, Reitze will...
New Process Paves Way for Affordable PV
DRESDEN, Germany, Aug. 30, 2011 — Thin-film solar cells consist of several layers, with each having a different function. The light-absorbing layer is in the center, encapsulation layers on the outer sides protect the solar cell against environmental influences, and contact layers...
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