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Research & Technology News
Laser Imaging Sees the Pulse Racing
Apr 1, 1999 — A laser imaging system is helping researchers to better understand how blood flows through an artificial heart. Researchers use particle image velocimetry to study blood flow through a mechanical heart, and to pinpoint areas that could cause blood clots or other problems. Courtesy of Jaikrishnan Kadambi. Surface flaws, discontinuities between surfaces and imperfect flow patterns can cause cells or platelets to stick to the mechanical heart valves and chambers, forming blood clots and causing...
Lasers Bond Difficult Plastics
Apr 1, 1999 — Researchers have devised a laser technique that bonds thermoplastics without using environmentally unfriendly pretreatments. The method -- developed by the Warwick Manufacturing Group at the University of Warwick -- promises to take less time and...
Lasers Make Rails Safer for Travel
Apr 1, 1999 — Researchers at the US Department of Energy's Argonne National Laboratory have developed a laser glazing technique that could reduce costs, pollution and danger in railroad systems. Rails are plagued with subsurface cracks that multiply parallel...
Lidar Shows How Pollutants Stack up
Apr 1, 1999 — Researchers at the University of Lyon are using lidar to create a three-dimensional map of air pollution. Although lidar has been used to map the atmospheric distribution of such noxious gases as nitrous oxide, sulfur dioxide and ozone, the...
Light Stamp Simplifies Lithography
Apr 1, 1999 — As the semiconductor industry struggles to expand optical lithography's capabilities and decide on the next-generation tool, one research group has come up with an alternative. A team at the IBM Zurich Research Laboratory has developed a relatively...
Mars Photos Show Volcanic Activity
Apr 1, 1999 — NASA's Mars Global Surveyor has snapped photos that suggest horizontal layers extend deep into Mars' canyons, a sign that volcanic activity played a pivotal role in the early geology of the planet, according to a report in the Feb. 18 issue of...
Memory Cell Seizes the Light
Apr 1, 1999 — As useful as light is, it's not the easiest thing to keep hold of. Storing light for any substantial amount of time for later use is difficult, and current methods are less than optimal. Solutions such as bouncing the light back and forth in a...
Novel Method Puts CMOS Imagers in Stitches
Apr 1, 1999 — In the battle of the image sensors, Tower Semiconductor Inc. of Migdal Haemek, Israel, has developed a production method that should help complementary metal oxide semiconductor (CMOS) sensors compete with charge-coupled devices (CCDs). The foundry...
One at a Time, Please
Apr 1, 1999 — Photons are gregarious. Unlike electrons, photons have no trouble congregating. For most applications, that's not a problem. However, this behavior makes it difficult to fill regular time slots with a single photon. Microscopic posts act as...
Passive IR Spectroscopy Monitors Volcanic Gases
Apr 1, 1999 — One of the most a ctive volcanoes in the world could provide researchers with important insights into processes deep within the Earth and lead to more accurate forecasts of eruptions. The problem with studying volcanic gases is the need for direct...
Physicists Bring Light to a Crawl
Apr 1, 1999 — Light travels in a vacuum at 186,282 miles a second. Experiments at the Rowland Institute for Science have slowed that speed 20 million times, essentially allowing light to travel along a typical suburban throughway without getting a speeding fine....
Researchers Unveil Ultrafast, All-Optical Switch
Apr 1, 1999 — Ultrafast, all-optical switches have generated a lot of interest for future optical communication systems and optical processing, particularly in their application in optical demultiplexers for time-division-multiplexed communications. A group...
Small World Photo Competition Seeks Entries
Apr 1, 1999 — Nikon Inc. is soliciting entries for its 25th Annual Nikon International Small World Photo Competition. Each participant may submit up to three 35-mm transparencies of photos taken through a light microscope. Digitally captured photos are accepted,...
Software Enhances Grainy Security Videos
Apr 1, 1999 — The images are familiar: a burglar caught in the act by a convenience store's security camera. As useful as these security tapes are, they are often too grainy to erase doubts about a suspect's identity. A software package developed by the US...
Spacecraft Captures Flyby Images
Apr 1, 1999 — Almost three years after its launch in February 1996, the multispectral imager onboard NASA's Near Earth Asteroid Rendezvous spacecraft imaged its eventual orbiting partner, the siliceous asteroid 433 Eros in an unintended flyby. A December 1998...
Tissue Welding Gets Helping Hand
Apr 1, 1999 — Tissue welding is a laser-based surgical technique that is still in the research stage, and several groups are involved in exploring and improving the method's viability. Researchers at Lawrence Livermore National Laboratory have developed a device...
Tyco Submarine Systems Achieves 640 Gb/s per Fiber
Apr 1, 1999 — Tyco Submarines Systems Ltd., based in Morristown, N.J., has demonstrated in a laboratory experiment transmission of 64 10-Gb/s WDM channels on a single fiber path over a distance of 7200 km, representing an overall capacity of 640 Gb/s per fiber....
All-Photonic Circuits at Hand
Mar 1, 1999 — Nanovation Technologies Inc. has entered the testing phase of its development of a fully integrated optical circuit, a technology that promises to deliver faster, higher-capacity communications to the marketplace by the end of the year, in packages...
Atomic Force Microscope Could Draw Tiny Circuits
Mar 1, 1999 — Scientists at Northwestern University in Evanston, Ill., have found a new application for atomic force microscopes: fabricating nanoelectronic circuitry. Researchers at the university discovered that the lab tool could transfer molecules with...
Ballast Water Purified with UV Waves
Mar 1, 1999 — If "bioinvasions" has a futuristic sound to it, the future is now. With the speed and volume of global travel, even organisms can find themselves quickly transplanted to a new environment. In some cases, that can spell disaster for the fragile...
Company Promises Painless Glucose Monitoring
Mar 1, 1999 — Diabetics around the globe have yearned for an alternative to the lancet and needle to monitor blood glucose levels. The wait may soon be over. Norcross, Ga.-based SpectRx Inc. has developed a device that painlessly monitors a person's blood glucose...
Nichia's Blue Diodes Find a Home
Mar 1, 1999 — Barely a month after Nichia Chemical Industries Ltd. announced the first shipments of its blue laser diodes, a second company has rushed to incorporate the diodes into a laser system touted as a more powerful blue light source for spectroscopy. In...
Phased out by Coherent Control
Mar 1, 1999 — A "textbook" laboratory demonstration of a basic quantum physical principle could lay the groundwork for practical applications in photochemistry, forensics, quantitative analysis and quantum computing. Using ultrafast optical techniques,...
Polishing System Takes Pressure off Making Aspheres
Mar 1, 1999 — As the use of aspherical optical components broadens, the industry is trying to overcome the challenges that the processing of those surfaces present. Researchers at the Delft University of Technology have developed a finishing process that uses a...
School of Optics Hosts Inaugural Conference
Mar 1, 1999 — The Center for Research and Education in Optics and Lasers (CREOL) kicked off an inaugural conference Jan. 11 and 12 to celebrate the opening of its School of Optics at the University of Central Florida in Orlando. Distinguished members of the...
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