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(38,156 articles)
Popular News
Scientists Study Galaxies Developing in Hubble Deep Field
Mar 1, 1997 — Merging galaxies and fluctuations in star population were reported by astronomers at the University of California at Santa Cruz's Keck Telescope. Employing Keck's low-resolution imaging spectrograph along with the Hubble Space Telescope, scientists studied the evolution of 24 galaxies in the Hubble Deep Field and used the collected spectra to determine the distances to roughly half of the galaxies. The report concluded that the galaxies did not grow uniformly, but may have merged or faded into...
Safer, Cheaper Laser-Based Alternative to Prostate Resection Presented
Mar 1, 1997 — Surgeon John Kabalin of Stanford University School of Medicine gave a presentation describing HoLRP, a new transurethral/endoscopic procedure he helped develop as an alternative to transurethral prostatic resection. Kabalin said the HoLRP is as...
MCI Tests Wavelength Division Multiplexing System
Mar 1, 1997 — In an effort to increase the capacity of its existing fiber plant, telecommunications giant MCI has launched what it calls the first real-world combination of a 10-Gb/s OC-192 networking system and wavelength division multiplexing on 60 circuits...
Micro- and Nanosatellites Could Populate New Earth-Orbit Constellations
Mar 1, 1997 — A team of researchers from The Aerospace Corp., led by I.L. Helvajian, hopes developments in laser machining will allow space agencies and communications companies to produce satellites with diameters under 15 cm, the same way hardware manufacturers...
NASA Detector Could Help Prevent Gas Explosions
Mar 1, 1997 — Researchers at NASA Langley Research Center have developed an optical flameout detection system for monitoring the combustor in the research center's propulsion test air tunnel. The fast-responding (less than 100 ms) detection process monitors light...
Partnership Targets Laser Patterning for Flat-Panel Displays
Mar 1, 1997 — General Scanning Inc. of Watertown, Mass., and an undisclosed industry partner are developing a novel laser patterning system for use in the manufacture of flat-panel displays. The company will design and build a prototype system to prove the...
French Navy Looks at Optical Sensors to Avoid Electromagnetic Pulses
Mar 1, 1997 — Photonetics SA and the Direction des Constructions Navales are making final tests on a wide range of optical sensors and systems to prove that optical networks are the way to go. Using silicon wafers, glass plates and fiber optics, the French Navy...
X-Ray Observations Confirm Predictions of Black Hole Signature
Mar 1, 1997 — Researchers at Stanford University observed a potential new black hole, comprising a unique signature that could help determine the mass and rotation rate of such objects with greater accuracy. The observations, made with a Rossi x-ray timing...
Astronomers Rise Above the Chaos
Feb 1, 1997 — GREENBELT, Md. -- Astronomers at NASA's Goddard Space Flight Center are using chaos-control technology to make an infrared semiconductor laser system more effective for spectroscopy.The term chaos can be misleading, according to Gordon Chin, head of...
Bioengineering Gets a Boost
Feb 1, 1997 — ROCHESTER, N.Y. -- A $986,000 grant from the Whitaker Foundation will boost the biomedical engineering program at the University of Rochester.The grant will help fund a teaching laboratory and three new faculty members to the schools of engineering...
Crystal Simulation Shows Promise in High-Efficiency Light Bending
Feb 1, 1997 — CAMBRIDGE, Mass. -- A photonic crystal specially designed to bend light sharply with near-perfect transmission could be the key to further miniaturization of optical computer chips and lasers, according to the scientists at the Massachusetts...
Thin-Film Detector Shows High Response, Sensitivity for Radiation Measurement
Feb 1, 1997 — Using off-the-shelf production facilities and standard production methods, researchers working for the Canadian Defense Research Establishment have built a new radiation detector for use in the medical, nuclear and space fields, or wherever...
Quantum Dot Lasers Emerge from Semiconductor Rejects
Feb 1, 1997 — OTTAWA -- With an eye toward more powerful and smaller diode lasers, researchers at the National Research Council of Canada in Ottawa recently turned something semiconductor manufacturers consider undesirable into quantum dot lasers capable of...
European Space Agency Tests Optical Data Transmission in Space
Feb 1, 1997 — The European Space Agency (ESA) is using three telescope flight models from Carl Zeiss for its Satellite Interlink Experiment (SILEX) space research project. The mission to provide optical data links between ESA's SPOT 4 low-flying Earth-observation...
Excimer Laser Sheath Holds Promise for Pacemaker-Lead Removal
Feb 1, 1997 — Spectranetics Corp. of Colorado Springs, Colo., has filed an application with the US Food and Drug Administration for premarket approval of its excimer Laser Sheath for removal of pacemaker and implantable cardioverter defibrillator (ICD) leads. The...
Fiber Optic Probe Identifies Hazardous Contaminants
Feb 1, 1997 — WASHINGTON -- Hazardous waste site assessment and remediation are receiving increased attention these days, and a new development from the US Naval Research Laboratory (NRL) should enhance these efforts.A fiber optic infrared reflectance probe that...
Research Firm Targets More Efficient, Cheaper Satellite Solar Cells
Feb 1, 1997 — Essential Research Inc. of Cleveland is working on a high-efficiency, radiation-resistant solar cell to provide satellite power. The company plans to grow durable, inexpensive, high-quality indium phosphide solar cells on germanium substrates. The...
Gene-Scanning Chip Promises to Accelerate Biomedical Research
Feb 1, 1997 — A small silicon chip developed at Stanford University School of Medicine uses photolithographic and genetic engineering techniques to study several thousand genes simultaneously. The thumbnail-size GeneChip, developed with Affymetrix of Santa Clara,...
Laser Gyro To Monitor Rotation of the Earth
Feb 1, 1997 — OBERKOCHEN, Germany -- Carl Zeiss has built what it calls the world's largest ring-laser gyro. Designed for measuring the Earth's rotation, the device will be installed in a subterranean cave on the Banks Peninsula in New Zealand early this year....
Infant Technology Is More Than a Gleam in Its Developer's Eye
Feb 1, 1997 — SEATTLE -- If a photonics technology firm here has its way, soldiers, surgeons and video game fans will analyze their respective real or virtual environments in a whole new light. With a technique called virtual retinal display, computer users could...
Laser Detector Stymies Laser Weapons on High-Tech Battlefields
Feb 1, 1997 — Canadian-based The Alwend Group says its government's high angular resolution laser irradiance detector (HARLID) offers modern-day military the best defense against being targeted by laser-directed ordnance. The group is marketing the 1-Band HARLID...
Liquid-Crystal-Based Device Provides Brighter Projection Display
Feb 1, 1997 — A pixel device that uses polymer-dispersed liquid crystals could be the key to improved large-scale projection display, according to scientists at Spectra Science Corp. who developed the technology. The device demonstrated brightness that the...
Lumonics Delivers Nd:YAG Marking System for Use in Japanese Pilot Plant
Feb 1, 1997 — Lumonics Corp. of Oxnard, Calif., has delivered its 300-mm laser marking system to a Japanese silicon supplier. Shin-Etsu Handotni Co. Ltd. is using the WaferMark DSC 300 on its pilot production line to hard mark its 300-mm wafers before etching and...
Polarimeter Eyed for Faster Optical Analysis
Feb 1, 1997 — A new fast-imaging polarimeter under development at Cambridge Research & Instrumentation Inc. will enable users to measure the optical anisotropy of specimens in less than 1 s. The Cambridge, Mass.-based company received a Small Business...
Laser Sensor Monitors Distant Crosswinds
Feb 1, 1997 — ATLANTA -- A laser-based sensor can measure crosswind speeds for applications such as aviation safety and meteorology, Georgia Institute of Technology researchers report.The single-ended, long-path non-Doppler laser wind sensor registers faint wind...
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