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(38,345 articles)
Popular News
Following Flow by Mapping Heat
May 1, 2007 — Researchers at Zhejiang University of Technology in Hangzhou, China, have found that a little bit of warmth can go a long way when it comes to understanding the distillation process. The group used a thermal infrared camera to track the flow of warm and ambient-temperature water across a distillation tray. The scientists also determined how long the water spent at given locations and, thus, its residence time distribution. Their technique could provide a simple, direct and accurate...
Laser Heat Forms Nanobubbles
May 1, 2007 — Boiling water was thought to be a well-understood phenomenon until we entered the age of nanomaterials. Now the concept of nanobubbles, which collect on a surface when it is heated to boiling, is under study. A team from the National Institute of...
Thin-Disk Lasers Come of Age
May 1, 2007 — The thin-disk laser is a diode-pumped solid-state laser that produces high output power with both high efficiency and excellent beam quality. Since the first demonstration of the principle, by Adolf Giesen at the University of Stuttgart in 1993,1...
Are Quantum Dots on the Brink of Their Big Break?
May 1, 2007 — The period at the end of this sentence would be colossal next to a quantum dot — like a flea clinging to a good-size dog. As many as a million quantum dots could perhaps fit within the narrow confines of this circle: o. In other words, quantum...
Fiber Laser Simulators: Challenges and Opportunities
May 1, 2007 — From micron-size transistors to jumbo jets, all technological marvels have been simulated at some point in their development. And not only technology: Weather, stock markets and even the future of human society are predicted by computers — although...
Eye Safety in the Laser Lab
May 1, 2007 — Thinking about installing a laser safety interlock on the door to your Class 4 laser lab? If so, you might want to give that decision some careful consideration. A safety interlock that stops the laser or blocks the laser beam (with a shutter) if...
Selecting the Appropriate Optical Mount
May 1, 2007 — When engineers are choosing optics, a common mistake they make is overlooking the integration of optical mounts into their systems. There are a variety of mounts available for holding lenses, prisms, mirrors, filters and other optical components....
Three-Band White LED Shows Stability and High Color Rendering Index
May 1, 2007 — LED technology has advanced to the point where white LEDs are bright enough for general illumination, yet they are not without problems. Traditionally they have been developed by combining red, green and blue LEDs, but the problem with this approach...
Annealing and Activating Silicon Nanowires with a Laser
May 1, 2007 — In electronics, smaller is almost always better. That has been further illustrated by a recent study on annealing silicon nanowires by University of California, Berkeley, researchers in collaboration with Nanosys Inc. of Palo Alto, Calif. Silicon...
Seeing Smaller Features with Surface Plasmons
May 1, 2007 — Imaging using surface plasmon resonance — electron oscillations induced by light at a metal/dielectric interface — can reveal hidden features such as minute changes in biochemical structures. However, surface plasmon resonance imaging can be fuzzy...
Identifying Atoms by Feel
May 1, 2007 — Atomic force microscopes (AFMs) and other scanning probe devices can map surfaces on an atomic scale but have not been able to distinguish one type of atom from another using purely mechanical means. Now researchers have used an AFM to identify...
Silver Nanostructures with Unique Optical Properties Created
May 1, 2007 — Silver nanobars and nanorice with the ability to scatter and absorb light in the near-infrared have been produced by controlling the assembly of silver atoms in solution. These nanostructures could compete with nanorods made of gold as contrasting...
Nanoscale ‘Pins’ Enhance SERS
May 1, 2007 — Surface-enhanced Raman spectroscopy (SERS) is still a young technique, but it shows promise for elemental and chemical analysis in the semiconductor and biology fields, among others. It has been well established that using silver or gold nanoscale...
NANOPHOTONICS
May 1, 2007 — A technology study from Intertech-Pira titled “Advances in Nanophotonics” provides an overview of the field, including challenges and emerging trends across a wide variety of industries. It discusses nanophotonics applications, among them...
EP-IR ANALYSIS
May 1, 2007 — Aspectrics Inc. has released an application note titled “100 Chemical Pictures Every Second” that is downloadable from its Web site. The two-page document describes an experiment in which an Aspectrics MC5000A 128-channel encoded photometric (EP) IR...
SENSORS, CAMERAS
May 1, 2007 — Image processing components and systems supplier Framos Electronic Vertriebs GmbH has released its “More to See Catalogue 2006/2007.” Available in print and on CD-ROM, the resource specifies Sony CCD sensors with interlaced, progressive-scan and...
MACHINE VISION
May 1, 2007 — Firstsight Vision Ltd. has released Issue 3 of its Vision Elements: The Machine Vision Handbook, focusing on vision components and systems. The company says it contains 40 percent more information than the previous edition, offering new sections on...
FILTERS/FLUOROPHORES
May 1, 2007 — Omega Optical Inc. has enhanced its online Curv-o-matic tool, an interactive database of filter and filter set spectral curves that includes fluorophore absorption and emission spectra. It has introduced new fluorophores, including fluorescent...
PHOTONICS TEXTBOOK
May 1, 2007 — The full-color Fundamentals of Photonics, Second Edition, provides new material on photonic crystal optics, including multilayer and periodic media, waveguides, holey fibers and resonators; on ultrafast optics, including femtosecond optical pulses...
FIELD SPECTROSCOPY
May 1, 2007 — A specialist in portable spectroradiometers, Analytical Spectral Devices Inc. has launched a resource blog for the remote sensing community and field spectroscopy users of all levels and disciplines. Designed to serve as a clearinghouse for relevant...
DATA ACQUISITION
May 1, 2007 — Keithley Instruments Inc. has published the first edition of the handbook Understanding New Developments in Data Acquisition, Measurement and Control: A Practical Guide to High Performance Test and Measurement. With more than 220 pages, the guide is...
MEASURING MACHINES
May 1, 2007 — Hexagon Metrology Inc. has released a full-color six-page brochure to represent its newly formed Portable Metrology Group, which combines the resources of dimensional inspection manufacturers Romer and Leica Geosystems. The downloadable document...
PLATE READER
May 1, 2007 — Wyatt Technology Corp. has released a six-page brochure titled “DynaPro Plate Reader: High-Throughput, Automated Temperature-Controlled Dynamic Light Scattering.” The document notes that researchers using the reader can analyze as many samples in...
NAS Names 72 New Members
WASHINGTON, May 1, 2007 -- Seventy-two new members and 18 foreign associates from 12 countries were elected to the National Academy of Sciences (NAS) in recognition of their achievements in original research. The elections were held during a business meeting today during the...
Solar Spin Machine
May 1, 2007 — Sure, most governments twist events to their advantage when necessary. But the sun, it turns out, is the ultimate spin machine. Astronomers from Cornell University in Ithaca, N.Y., and from Queen’s University Belfast in the UK have evidence that...
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