News tagged with transformation
Explained: The Discrete Fourier Transform
(PhysOrg.com) -- In 1811, Joseph Fourier, the 43-year-old prefect of the French district of Isčre, entered a competition in heat research sponsored by the French Academy of Sciences. The paper he submitted ...
Nov 25, 2009 |
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The faster-than-fast Fourier transform
The Fourier transform is one of the most fundamental concepts in the information sciences. It’s a method for representing an irregular signal — such as the voltage fluctuations in the wire that conne ...
Jan 18, 2012 |
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Invisibility cloak that generates virtual images gets closer to realization
(PhysOrg.com) -- In a twist on the concept of an invisibility cloak, researchers have designed a material that not only makes an object invisible, but also generates one or more virtual images in its place. ...
Apr 02, 2010 |
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Unraveling the Matrix
A new way of analyzing grids of numbers known as matrices could improve signal-processing applications and data-compression schemes.
Jul 29, 2010 |
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Anti-mirror optical illusion could increase LED luminosity and laser power
(PhysOrg.com) -- By making multiple objects appear to look like only one using a "perfect lens," scientists have demonstrated a new optical illusion that could have practical applications in lighting systems. ...
Nov 15, 2010 |
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New materials turn heat into electricity
Most of today's power plants--from some of the largest solar arrays to nuclear energy facilities--rely on the boiling and condensing of water to produce energy.
Technology / Energy & Green Tech
Nov 07, 2011 |
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Researchers discover source for generating 'green' electricity
University of Minnesota engineering researchers in the College of Science and Engineering have recently discovered a new alloy material that converts heat directly into electricity. This revolutionary energy conversion method ...
Jun 22, 2011 |
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Nearly a century later, new findings support Warburg theory of cancer
German scientist Otto H. Warburg's theory on the origin of cancer earned him the Nobel Prize in 1931, but the biochemical basis for his theory remained elusive.
Medicine & Health / Medical research
Jan 12, 2009 |
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Physicists turn liquid into solid using an electric field
(PhysOrg.com) -- Physicists have predicted that under the influence of sufficiently high electric fields, liquid droplets of certain materials will undergo solidification, forming crystallites at temperature ...
Oct 11, 2011 |
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Engineers hit pay dirt with clay mixture
A watery, mud-like substance has hit pay dirt for Case Western Reserve University engineering professor David Schiraldi and his research group.
Apr 14, 2009 |
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Scientists create first free-standing 3-D cloak
Researchers in the US have, for the first time, cloaked a three-dimensional object standing in free space, bringing the much-talked-about invisibility cloak one step closer to reality.
Jan 26, 2012 |
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Plugless Power soon to arrive for electric and hybrid vehicles
(PhysOrg.com) -- Evatran, a company from Virginia in the US, has developed a working prototype of a plugless induction charger for electric and hybrid vehicles, and demonstrated the system at this week’s Plug In ...
Technology / Energy & Green Tech
Jul 30, 2010 |
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How did flowering plants evolve to dominate Earth?
To Charles Darwin it was an 'abominable mystery' and it is a question which has continued to vex evolutionists to this day: when did flowering plants evolve and how did they come to dominate plant life on earth? Today a study ...
Dec 01, 2009 |
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NASA Develops Algae Bioreactor as a Sustainable Energy Source
(PhysOrg.com) -- As a clean energy alternative, NASA invented an algae photo-bioreactor that grows algae in municipal wastewater to produce biofuel and a variety of other products.
Nov 18, 2009 |
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Transform a ball into a rock -- or make it invisible -- using transformation optics
(PhysOrg.com) -- Science fiction and fantasy tales are full of the ability to "cloak" characters with invisibility. Whether it is a spaceship with a cloaking device, or a young wizard with an invisibility ...
Jul 09, 2009 |
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