LOS ANGELES, California (AP) -- Here's a mind-bending idea: The U.S. military is paying scientists to study ways to read people's thoughts.
Scientists use electroencephalography, or brain wave-reading technology, to measure brain activity.
The hope is that the research could someday lead to a gadget capable of translating the thoughts of soldiers who suffered brain injuries in combat or even stroke patients in hospitals. But the research also raises concerns that such mind-reading technology could be used to interrogate the enemy.
Armed with a $4 million grant from the Army, scientists are studying brain signals to try to decipher what a person is thinking and to whom the person wants to direct the message.
The project is a collaboration among researchers at the University of California, Irvine; Carnegie Mellon University; and the University of Maryland.
The scientists use brain wave-reading technology known as electroencephalography, or EEG, which measures the brain's electrical activity through electrodes placed on the scalp.
It works like this: Volunteers wear an electrode cap and are asked to think of a word chosen by the researchers, who then analyze the brain activity.
In the future, scientists hope to develop thought-recognition software that would allow a computer to speak or type out a person's thought.
"To have a person think in a free manner and then figure out what that is, we're years away from that," said lead researcher Michael D'Zmura, who heads UC Irvine's cognitive sciences department.
D'Zmura said such a system would require extensive training by people trying to send a message and dismisses the notion that thoughts can be forced out.
"This will never be used in a way without somebody's real, active cooperation," he said.
John Pike, director of GlobalSecurity.org, a Virginia-based defense research firm, said the technology is still too nascent to be of practical use for the military.
"They're still in the proof of principle stage," Pike said.
A message left with the Army was not immediately returned Friday.
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Saturday, August 16, 2008
Sunday, August 10, 2008
Nano Particle Physics - Invisibility Cloak
From The Sunday Times
August 10, 2008
Science close to unveiling invisible man
Jonathan Leake, Science Editor
INVISIBILITY devices, long the realm of science fiction and fantasy, have moved closer after scientists engineered a material that can bend visible light around objects.
The breakthrough could lead to systems for rendering anything from people to large objects, such as tanks and ships, invisible to the eye – although this is still years off.
Researchers at the University of California at Berkeley, whose work is funded by the American military, have engineered materials that can control light’s direction of travel. The world’s two leading scientific journals, Science and Nature, are expected to report the results this week.
It follows earlier work at Imperial College London that achieved similar results with microwaves. Like light, these are a form of electromagnetic radiation but their longer wave-length makes them far easier to manipulate. Achieving the same effect with visible light is a big advance.
Underlying the work is the idea that bending visible light around an object will hide it.
Xiang Zhang, the leader of the researchers, said: “In the case of invisibility cloaks or shields, the material would need to curve light waves completely around the object like a river flowing around a rock.” An observer looking at the cloaked object would then see light from behind it – making it seem to disappear.
Substances capable of achieving such feats are known as “meta-materials” and have the power to “grab” electromagnetic radiation and deflect it smoothly. No such material occurs naturally and it is only in the past few years that nano-scale engineering, manipulating matter at the level of atoms and molecules, has advanced sufficiently to give scientists the chance to create them.
The tiny scale at which such researchers must operate is astonishing in itself. Zhang’s researchers had to construct a material whose elements were engineered to within about 0.00000066 of a metre.
The military funding that Zhang has won for his research shows what kind of applications it might be used for, ushering in a new age of stealth technology.
August 10, 2008
Science close to unveiling invisible man
Jonathan Leake, Science Editor
INVISIBILITY devices, long the realm of science fiction and fantasy, have moved closer after scientists engineered a material that can bend visible light around objects.
The breakthrough could lead to systems for rendering anything from people to large objects, such as tanks and ships, invisible to the eye – although this is still years off.
Researchers at the University of California at Berkeley, whose work is funded by the American military, have engineered materials that can control light’s direction of travel. The world’s two leading scientific journals, Science and Nature, are expected to report the results this week.
It follows earlier work at Imperial College London that achieved similar results with microwaves. Like light, these are a form of electromagnetic radiation but their longer wave-length makes them far easier to manipulate. Achieving the same effect with visible light is a big advance.
Underlying the work is the idea that bending visible light around an object will hide it.
Xiang Zhang, the leader of the researchers, said: “In the case of invisibility cloaks or shields, the material would need to curve light waves completely around the object like a river flowing around a rock.” An observer looking at the cloaked object would then see light from behind it – making it seem to disappear.
Substances capable of achieving such feats are known as “meta-materials” and have the power to “grab” electromagnetic radiation and deflect it smoothly. No such material occurs naturally and it is only in the past few years that nano-scale engineering, manipulating matter at the level of atoms and molecules, has advanced sufficiently to give scientists the chance to create them.
The tiny scale at which such researchers must operate is astonishing in itself. Zhang’s researchers had to construct a material whose elements were engineered to within about 0.00000066 of a metre.
The military funding that Zhang has won for his research shows what kind of applications it might be used for, ushering in a new age of stealth technology.
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