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Accent on Applications News
Hybrid Sampling Identifies Floral Sources of Honey
Dec 1, 2005 — Not all honey is created equal. When bees feast on the pollen from different flowers, they produce honey that differs greatly in taste and appearance. For example, a study by the National Honey Board of Longmont, Colo., revealed that bees that dine on buckwheat create dark honey with a medicinal taste, while those eating clover produce sweet and transparent honey. Jagdish C. Tewari of Purdue University loads a Fourier transform infrared spectrometer with a sample of honey. The results,...
Camera System Makes Tennis Calls
Nov 1, 2005 — At the US Open in 2004, Serena Williams lost a tennis match in which the chair umpire ruled that her return had landed out of bounds. Television replays showed that the umpire’s call was incorrect. Some understandably declared the bad call a...
Looking at Clouds from Both Sides Now
Nov 1, 2005 — Clouds, as Joni Mitchell sang, get in the way. They block incoming sunlight and outgoing radiation, playing key roles in weather and in the transfer of heat in the atmosphere. They also influence optical communications and affect the availability of...
Photonics Inspects Space Shuttle
Nov 1, 2005 — Before starting out on a long trip, travelers examine their vehicle to make sure there will be no problems, particularly important when the mode of transportation is as complex as the space shuttle and the destination as exotic as space. For the...
Laser Micromachining Keeps the Olympic Torch Burning
Oct 1, 2005 — Prior to every Olympic Games, a handheld torch is lighted by the sun shining through a parabolic mirror at the original site of the event in Olympia, Greece. In a relay that has come to symbolize peace throughout the world, thousands of runners...
Laser Spots Unique Codes in Materials
Oct 1, 2005 — As identity theft becomes more common, security companies are seeking advanced tools to help guard against fraud in such documents as passports, identification cards, credit cards and banknotes. Current methods all have drawbacks; for example, they...
Lidar Spots Bomb-Sniffing Honeybees
Oct 1, 2005 — Bees aren’t busy just for the sake of being busy. The constant foraging for pollen by honeybees enables the hive to exist. This industriousness also has been proposed as a means to locate land mines. Trained honeybees have been proposed as a...
Photonics Enables Conservators to Get a Clearer Picture of Art
Oct 1, 2005 — Art Institute of Chicago, Fourier transform infrared microscopy, Raman microscope equipped with an Andor CCD detector, a holographic notch filter and various dispersion gratings. She also uses multiple lasers operating at different wavelengths,...
Frozen Photodetectors Present Design Challenges
Sep 1, 2005 — Of the high-energy particles thrown out by cataclysmic astrophysical sources in the universe, such as novas and gamma-ray bursts, only the elusive and weakly interacting neutrinos can be accurately traced to their points of origin. Neutrinos are...
Laser Scanning Keeps Old Military Equipment in Service
Sep 1, 2005 — Military hardware is aging fast. In some cases, it's older than the soldiers who use it. Spare parts are required to keep this equipment running, but many of the companies that supplied them have long left the business, and drawings and...
Beam Profiling Improves Laser Welding
Aug 1, 2005 — Welding with CO2 lasers is common in all kinds of manufacturing environments. Despite its general reliability, changes in a weld from beginning to end as the power of the laser diminishes can create a problem. Figure 1. The beam profile at the...
Combined Software Tools Model Effects of Optics on Ultrashort Pulses
Aug 1, 2005 — Researchers and optical systems designers at Fraunhofer Institut für Angewandte Optik und Feinmechanik in Jena, Germany, faced a short and theoretical problem, but one with lengthy and real consequences: Laser pulses with durations of less than 100...
Femtosecond Laser Brings 3-D to Microfluidics
Aug 1, 2005 — Microfluidic devices have submillimeter channels designed to control the flow of very small volumes of liquids, offering the promise of providing highly capable biological assays for such applications as bedside clinical diagnostics. Traditional...
Laser Technology Identifies Counterfeit Currency
Aug 1, 2005 — Counterfeiting currency is neither a new problem nor is it limited to any one country or currency. For example, since the euro was released in 2002, both the quality and quantity of counterfeiting has increased. With improved computers, scanners and...
Ink Treatment Enables Desktop Laser-Based Paper Cutting
Jul 1, 2005 — Olivier Acher sympathizes with anyone who has struggled to get business cards or invitations printed on short notice. These and similar tasks depend on the availability of paper that has been precut or scored into standard shapes and...
Raman Spectroscopy Analyzes Illumination in Gutenberg Bibles
Jul 1, 2005 — Johannes Gutenberg is considered the inventor of European printing because he was the first to use movable metal type, back in the mid-15th century. His workshop in Mainz, Germany, produced approximately 180 copies of the Bible in 1455, and...
Tasting Apples Without Taking a Bite
Jul 1, 2005 — You can't compare apples to oranges. However, people do compare apples to apples, searching for fruit that looks good and that also offers consistent taste and texture. The problem lies in judging an apple without biting into it. Renfu Lu, an...
Fourier Transform IR Spectroscopy Samples Wine
Jun 1, 2005 — An old saying asserts, "There is truth in wine," but winemakers need to know what else besides veritas there is in vino. The alcohol content of wine is routinely monitored for quality control and regulatory purposes, but a wine's worth depends on a...
Spectroscopy Probes Gum Content
Jun 1, 2005 — Gums, or galactomannans and cellulose-backbone polysaccharides, improve the taste and appeal of food. For example, the addition of a dash of gum can make a texture more gelatinous. However, monitoring what types of gums are added during...
Time-Resolved Spectroscopy Investigates Nuclear Waste
Jun 1, 2005 — The development of nuclear weapons and the generation of nuclear power produce large quantities of waste uranium that poses both a chemical and radiological hazard. Although the US is no longer producing these weapons, and the growth of the power...
Microscope Examines Raw Materials
May 1, 2005 — In the constant battle to stay ahead of the competition, a recognized leader in the development of consumer goods, foods, health care items and other products must analyze complex 3-D materials with extreme precision. For example, examining raw...
UV Laser Ablation Studies Volcanic Hazard
May 1, 2005 — Laser ablation technology used by investigators at The Open University in Milton Keynes, UK, offers high-resolution sampling for earth and environmental sciences. One topic of research involves the processes and parameters that enable the modeling...
Near-IR Improves Measurement of Fat Content
Apr 1, 2005 — Sandra E. Kays, a research chemist at the US Department of Agriculture's Agricultural Research Service in Athens, Ga., would like to make producing the nutrition label on a cereal box as easy as reading it. Today, making the measurements for...
Photonics Applied to Fresco Preservation
Apr 1, 2005 — In Roman catacombs, tributes to the dead attract the living. Some visitors are tourists who come to see the frescoes that adorn the walls. Others, however, don't depart with the guides: Bacteria, algae and other microorganisms stay to dine on the...
Atomic Force Microscopy Acquisition Rates Accelerate
Mar 1, 2005 — Because they are mechanical devices, conventional atomic force microscopes (AFMs) can see fine details but not fast ones. The instruments make nanoscale measurements by dragging a sharp stylus across a sample, and their readout involves tracking the...
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June 2024
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