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Research & Technology News
Vision Systems Stamp Out Bushfires
MELBOURNE, Australia -- MELBOURNE, Australia -- The threat of bushfires looms large in southern Australia. An airborne vision system under development may make prevention easier by targeting one of the leading causes of fire: contact between power lines and tree branches in the bush. Contact between tree branches and power lines is a leading cause of bushfires in southern Australia. An airborne vision system that reconstructs the terrain in three dimensions may enable power companies to better monitor tree ...
X-Rays Expose Nonthermal Melting
PALAISEAU, France -- PALAISEAU, France -- Using time-resolved x-ray spectroscopy, researchers at Laboratoire d’Optique Appliquée have observed nonthermal melting in InSb. The work illustrates the expanding application of time-resolved femtosecond...
Better Robots See like a Spider
PASADENA, Calif. -- PASADENA, Calif. -- How do you increase resolution and decrease fixed pattern noise in a robot’s vision while using fewer photoreceptors? By borrowing an idea from the tropical jumping spider, say researchers Oliver D. Landolt and Ania Mitros....
Cameras Promise a Look at Space Experiments
MOUNTAIN VIEW, Calif. -- MOUNTAIN VIEW, Calif. -- One justification for the multibillion-dollar International Space Station is that it is an orbiting laboratory. Rather than constructing a different satellite to conduct each experiment, researchers can use the resources on...
Free-Electron Laser Reaches Saturation
Jul 1, 2001 — A research team at Argonne National Laboratory in Argonne, Ill., has reported saturation at the 530- and 385-nm wavelengths in its free-electron laser, which is based on self-amplified spontaneous emission. In a saturated free-electron laser, the...
Fringe Technology Benefits Interferometric Lithography
CHRISTCHURCH, New Zealand -- CHRISTCHURCH, New Zealand -- Like the circuitry on integrated chips, the periodic stripes etched on laser diodes are shrinking. It is intuitive that reducing feature dimensions is simply a matter of reducing the illumination wavelength of a...
Hologram on Display in Texas
Jul 1, 2001 — The first of three sections of a "Texas-size" hologram has been installed over the baggage claim area of Barbara Jordan Terminal at Austin-Bergstrom International Airport in Austin, Texas. Donated by Samsung Austin Semiconductor, Zebra Imaging Inc....
Imaging Finds Defects in Tiles
BRISTOL, UK -- BRISTOL, UK -- A challenge for tile manufacturers is detecting hard-to-spot defects and blemishes amid the randomly colored patterns on the tiles. Despite the push toward automation in the industry, quality control has remained a manual operation,...
Infrared Ovens Make Quick Work of Asphalt Testing
FAYETTEVILLE, Ark. -- FAYETTEVILLE, Ark. -- No one likes driving on a road pitted with ruts and potholes. One way to ensure smooth roads is to use good asphalt, and the key to high-quality asphalt is achieving the proper proportions of aggregate, air and binder. Too much...
Interference Challenges Quantum Computing
Jul 1, 2001 — A research team at the University of Rochester in New York has demonstrated that computing by optical interference may be as efficient as proposed quantum computing schemes. The team reported the work in May at CLEO/QELS 2001 in Baltimore. To...
Is the Airborne Laser Allergic to Dust?
NEGEV, Israel -- NEGEV, Israel -- America’s $11.3 billion Airborne Laser missile defense program could be defeated by dust, said researcher Natan (Norman) S. Kopeika of Ben-Gurion University. An artist’s rendition of the Airborne Laser system in action...
Laser Ablation Generates Nanoparticles
AUSTIN, Texas -- AUSTIN, Texas -- Nanoparticles are finding diverse application as devices such as biological sensors, and they show potential as the basis of novel LEDs. Typically, nanometer-size particles are grown through vapor condensation or flame or spray...
Laser Light Enables 3-D Doping
KONSTANZ, Germany -- KONSTANZ, Germany -- Laser diodes, light-emitting diodes and photovoltaic cells all have one thing in common: They consist of semiconductor chips, which necessarily contain electronic bandgaps. Light can be used to dope structures at the nanoscale...
Light Drives Molecular Piston
AMSTERDAM, Netherlands -- AMSTERDAM, Netherlands -- Advancing the development of micromachines, researchers from the Netherlands, Italy and the UK have constructed the world’s smallest piston. Powered by laser light, the molecule-size piston can move objects a few...
Light Powers Micromachines
SUDBURY, Ontario, Canada -- SUDBURY, Ontario, Canada -- Machines based on microelectromechanical systems (MEMS) and micro-optoelectromechanical systems show promise for innumerable applications. Some macroscopic structures can be scaled to microscopic dimensions; however, the...
Multispectral Images Expose City Dynamics
Jul 1, 2001 — Using data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer aboard NASA’s Terra satellite, geologists at Arizona State University in Tempe are learning why cities form the way they do. An analysis of 12 cities from nine...
Multispectral Imaging Reopens Old Texts
Jul 1, 2001 — PROVO, Utah -- Our record of Western antiquity is a piecemeal assemblage of oral traditions, myths and scattered clues from gravestones, road markings, coins, civic monuments and pottery shards. This dearth of a coherent body of literature to...
Quantum Wells Stack Up
OTTAWA -- OTTAWA -- Although single-channel quantum-well infrared photodetector arrays have arrived on the commercial market, multiwavelength arrays have not left the lab. Among impediments to commercialization are the cost and complexity of integrating...
Satellite Carries Laser Experiment
Jul 1, 2001 — A 1400-lb satellite carrying an experimental laser communications package has been successfully launched from Cape Canaveral Air Force Station in Florida. The National Reconnaissance Office’s GeoLite satellite was built by TRW Space &...
Thermal Detector Studies the Sun
WOBURN, Mass. -- WOBURN, Mass. -- Changes in the sun’s luminosity may affect the global climate over a timescale of centuries. Scientists attempting to quantify these changes must cope with both a wide spectral range and the extreme spatial variation across...
Acousto-Optic Effect Studied
Jun 1, 2001 — Gradients of acoustic pressure in nematic liquid crystal, known as acoustic streaming, are responsible for the acousto-optic effect, according to researchers from Chung Yuan Christian University in Chung-Li and National Chao Tung University in...
Büchi Opens Spectroscopy Competition
Jun 1, 2001 — Büchi Labortechnik AG of Flawil, Switzerland, is accepting applications for its award recognizing contributions to and applications of near-infrared spectroscopy. The application deadline for the award, which amounts to $5000, is June 30....
Bugs Lead the Way to Better Detectors
BONN, Germany -- BONN, Germany -- Photonics regularly draws the inspiration for new technologies from the natural world, such as microbolometers and green fluorescent protein from rattlesnakes and jellyfish, respectively. It should come as no surprise, then, that...
CoO Infiltration Enhances YIG Films
Jun 1, 2001 — A team at the National Physical Laboratory in New Delhi, India, has developed films of infiltrated yttrium iron garnet that promise applications as high-density magneto-optical recording media, waveguides and modulators in integrated optical...
Cosmos 1 Solar Sail Delayed
Jun 1, 2001 — An accident during prelaunch testing has delayed the test flight of the Cosmos 1, which was developed by Babakin Space Center in Moscow for The Planetary Society of Pasadena, Calif. The solar sail remains scheduled for late September or early...
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