Applied Physics
- Electrocoalescence: Merging Microdroplets Using An Electric Field
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In microfluidic devices, small separated droplets flow in a stream of carrier liquid. Occasionally, selected droplets have to be merged to carry out a chemical reaction, which can be greatly facilitated with the use of electric field through a process of e ...
Article - News Staff - Aug 24 2011 - 7:52pm
- Chaos In A Coffee Stain
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The ring-shaped stains of tiny dissolved particles, like a coffee stains from the bottom of a cup, that develop after a liquid has evaporated hold a physics mystery- while the particles on the outside of the ring are neatly organized, chaos reigns on the ...
Article - News Staff - Aug 29 2011 - 10:33am
- Redefining The Kelvin? Making Temperature A True Constant
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We like to think some things are constant, like temperature, and they are as long as everyone agrees. That does not mean they are accurate. The metric system is a famous example of a flawed measurement that nonetheless became popular. Temperature is bas ...
Article - News Staff - Sep 20 2011 - 12:37pm
- Making A More Accurate Ampere
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Efforts have long been underway to make the Système Internationale d'unités (SI Units) more accurate. If you know your science history, SI units were devised during the French Revolution as an alternative to the British System. And so the French Ac ...
Article - News Staff - Sep 29 2011 - 10:05am
- Electrocrystallization Turns A Liquid Into A Solid
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Electrocrystallization, electric-field-induced phase transformation, predicts that under the influence of sufficiently high electric fields, liquid droplets of certain materials will undergo solidification, forming crystallites at temperature and pressur ...
Article - News Staff - Oct 11 2011 - 1:30pm
- Better Speakers Using Laser-Driven Sound Fields
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Loudspeakers have improved a lot in the last 50 years but one pesky issue has remained; dead spots. Modern oudspeakers can be designed to deliver the full frequency range of audible sound but it is difficult to achieve a smooth frequency output in all ...
Article - News Staff - Nov 8 2011 - 12:00pm
- World’s Lightest Metal Is 1/100th The Weight Of Styrofoam
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Researchers have developed what they are billing as the world’s lightest material. With a density of 0.9 mg/cc, it is about one hundred times lighter than Styrofoam™. The new material redefines the limits of lightweight materials because of its unique “mi ...
Article - News Staff - Nov 21 2011 - 11:50am
- Shear Strain- The Jam In Your Coffee
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Scientists aren't sure what causes clogs in flowing macroscopic particles, like corn, coffee beans and coal chunks. But new experiments suggest that when particles undergo shear strain, they jam sooner than expected. Shear strain is sort of like cupp ...
Article - News Staff - Dec 18 2011 - 8:30am
- Ohm For Christmas
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Ohm For Christmas The ohm is the unit of electrical resistance. It is named in honor of the genius of Georg Ohm, who figured out that the flow of electricity in materials from a 'hot' source might just resemble the flow of heat from a hot sourc ...
Article - Patrick Lockerby - Dec 23 2011 - 7:06pm
- The Genius Of Georg Ohm
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The Genius Of Georg Ohm Much of the genius of Georg Ohm is forgotten. He is remembered mostly as the scientist who defined the relationship between electrical resistance, electric force and electric current. Not only do writers generally ignore Georg Oh ...
Article - Patrick Lockerby - Jan 16 2012 - 7:36pm
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