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Accent on Applications News
Optical Techniques Gauge Champagne Bubble Stability
Aug 1, 2007 — The hallmark of a good glass of champagne is a stable ring of bubbles — called a collar — at the top of the glass. The formation and disappearance of these bubbles are delicate phenomena that are sought after by champagne makers, but they are not easily reproduced. They are determined by the adsorption layers formed at the gas/liquid interface on the inside of the bubbles and at the air surface of the liquid. Researchers in France have used optical techniques to investigate the stability...
Studying Engines in Action
Aug 1, 2007 — Although it was enough for a famous “little engine” to think it could, more than wishful thinking is needed to move things along in the real world. Motors produce movement by using an energy source, which for internal combustion engines is a...
A Tale of Fish and Stones
Jul 1, 2007 — For Vincent P. Palace, head of the Environmental Center for Research on Pesticides at Freshwater Institute in Winnipeg, Manitoba, Canada, success is not a fish tale. Instead, it is a fish otolith — a stonelike structure in the ear composed of...
Infrared Camera Helps Spot Perimeter Intruders
Jul 1, 2007 — Airports and harbors face a common security challenge: Their large areas translate into long perimeters — often many miles long. Traditional perimeter control has involved a fence, guards and surveillance cameras. However, fences cannot be used...
At the Bottom of the Sea
Jun 1, 2007 — As Samuel Taylor Coleridge’s Ancient Mariner noted, there is water everywhere in the ocean, but none is fit to drink. The simple answer that the water is too salty is not informative enough for oceanographers. They want to know exactly what is in...
NIR Imaging for Deep Space
Jun 1, 2007 — What is dark energy? How much is there? And what is it doing to the universe? A growing number of scientists is hoping to answer those complex questions as preparations are made for the 2011 launch of the Joint Dark Energy Mission sponsored by...
Stenciling Technique Makes Nanostructures
May 1, 2007 — As electronic devices get smaller and smaller, interconnecting them and addressing them electrically becomes a challenge. Single-molecule devices, for example, are of no use unless they can be integrated into complex integrated circuits and...
You Are Not the Only One Who Needs Iron
May 1, 2007 — It is easy to look out over the ocean and think that nothing could be less like a desert, yet the two share some things in common. For one, life may struggle in either region whenever a vital ingredient becomes scarce: In the desert, it is water; in...
Copper Film Enables Accurate Optical Humidity Sensing
Apr 1, 2007 — Today’s food packaging gives you a lot of information about your food, including ingredients and number of calories, but it cannot tell you whether the fruit salad you want to buy is drying out or if your breakfast cereal is crunchy or soggy. The...
NIR Spectroscopy Determines Healthiest Seeds
Apr 1, 2007 — Perilla, an oilseed crop grown in Asian countries, is consumed in oil form as a spice or medicine and in its leafy form as a vegetable. The seed is made up of several fatty acids, especially linolenic acid, which has been found to be beneficial for...
Machine vision helps create a smart dartboard
Mar 1, 2007 — An interdisciplinary group of students from Technical University of Munich in Germany recently put machine vision to the test. Although experts had deemed the project as unfeasible or illusory, the students created a high-speed dartboard that moves...
Tasting the Fizz of Soda Pop
Mar 1, 2007 — Flat soda tastes different from fresh, and Kenneth S. Suslick, a chemistry professor at the University of Illinois at Urbana-Champaign, has the pictures to prove it. The loss of carbon dioxide can clearly be detected in the output of a color-based...
Building a Better Wheelchair for Car Drivers
Feb 1, 2007 — Powered wheelchairs both help and hinder users. Over short distances, the conveyances help people get around. However, for longer distances, where one typically would use a car, wheelchairs get in the way. Storing them safely for a trip is difficult...
Chemiluminescence Determines Whether Water Is Safe
Feb 1, 2007 — Arsenic does not just kill people in murder mysteries. The metalloid is poisonous, and long-term exposure at low levels leads to health problems such as skin, bladder, lung and prostate cancer. Arsenic exposure has been linked to a host of other...
Crop-Spraying System Targets Weeds
Feb 1, 2007 — When farmers want to spray their crops, they can either blanket spray the entire field, or spray spots by hand. Blanket spraying is not only detrimental to the environment, but also leads to yield losses; and spot spraying is time-consuming,...
Pulsed Light Peels Away Poisonous Paint
Feb 1, 2007 — Removal of lead paint — a material that was banned in the US in the late 1970s — is difficult and dangerous work, not to mention costly. Traditional removal methods, such as sanding, heat stripping or chemical stripping, can worsen the problem by...
Taking a Laser’s Temperature Remotely
Feb 1, 2007 — It is not just people who get hot and bothered; the same is true for high-power laser diodes, where the buildup of heat leads to thermally induced changes in the refractive index. Such changes can significantly alter the shape and position of the...
Optical Methods for Air Quality Measurements
Jan 1, 2007 — Soot, or carbon, in the air is both an environmental and a health problem. Not only do carbon-based aerosols contribute to the greenhouse effect, but also breathing in the byproducts of combustion processes can have serious physical effects. Despite...
Profiling Potential Petroleum Production
Jan 1, 2007 — Oil often has to be coaxed out of the ground, but various conditions hinder pumping and decrease production. One problem might be that the oil cannot flow freely through the rock. One way to stimulate a well is to inject acid, which cuts channels...
Laser Engraving Makes Robust Bar Codes on Automotive Parts
Dec 1, 2006 — Automotive manufacturers cannot afford even short delays on the production line, and each part must be labeled clearly to avoid mistakes. Anytime the line stops, it costs money. However, traditional methods of labeling automotive parts, such as...
Picking Cotton — and Nothing Else
Dec 1, 2006 — Before cotton becomes the fabric of our lives, it must be picked. The problem, however, is that more than cotton ends up being harvested. According to industry figures, 22 percent of the cotton bales gathered worldwide are either seriously or...
Spectroscopy Identifies Botanical and Geographic Origins of Honey
Nov 1, 2006 — Honey is a complicated food to analyze. Because it is difficult to know from where, exactly, the bees get their nectar, it is difficult to label honey accurately. Some honeys claim to be unifloral, with distinct tastes and characteristics, but most...
Optical Vortex Traps Tiny Droplets
Oct 1, 2006 — For Daniel T. Chiu, a chemistry professor at the University of Washington in Seattle, all but the smallest drops of fluid are too big and more than one, too many. Therefore, he developed a method to generate single femtoliter droplets, using an...
Oxygen Measured in Water by Making Movies
Oct 1, 2006 — When asked to describe a new technique that measures sedimentary oxygen content arising from the activity of burrowing animals, researcher Lubos Polerecky of Max Planck Institute for Marine Microbiology in Bremen, Germany, turned to paraphrase. The...
Designing Automotive Lighting with LEDs
Sep 1, 2006 — The LED is driving a fundamental technological change in the lighting industry, and automotive lighting is no exception. Using LEDs in exterior automotive lighting provides product differentiation, longer life and lower maintenance costs. The...
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August 2024
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