Technology Archives

Non-invasive sensor can detect brainwaves remotely

Scientists have developed a sensor that can record brainwaves without the need for electrodes to be inserted into the brain or even for them to be placed on the scalp. Conventional electroencephalograms (EEGs) monitor electrical activity in the brain with electrodes placed either on the scalp (involving hair removal and skin abrasion) or inserted directly into the brain with needles. Now a non-invasive form of EEG has been devised by Professor Terry Clark and his colleagues in the Centre for Physical Electronics at the University of Sussex. Instead of measuring charge flow through an electrode (with attendant distortions, in the case of scalp electrodes) the new system measures electric fields remotely, an advance made possible by new developments in sensor technology.

NASA Music Out of this World

With scientific instruments on NASA’s Voyagers, Galileo, Cassini and more than two dozen other spacecraft, University of Iowa physicist Dr. Don Gurnett has been recording waves that course through the thin, electrically charged gas pervading the near-vacuum of outer space. Gurnett converted the recorded plasma waves into sounds, much as a receiver turns radio waves into sound waves. “I’ve got a cardboard box full of cassette tapes of sounds that I’ve collected over nearly 40 years,” he said. Gurnett’s tapes have inspired a 10-movement musical composition called “Sun Rings.” The Grammy-nominated Kronos Quartet will premiere “Rings” this month.

Progress Made by Seismologists in Identifying Violations of Nuclear Test Ban

Detection techniques and technology have improved so much in recent years that seismologists now say they are able to detect and identify virtually all events that might be nuclear explosions of possible military significance under the Comprehensive Test Ban Treaty. Verification was a major issue in the U.S. Senate debate in 1999, in which American ratification of the treaty was defeated.

Shuttle Radar Clears the Air on Central America’s Topography

NASA’s Jet Propulsion Laboratory has completed the first comprehensive high-resolution topographic map of Central America, a region where persistent cloud cover had made high-quality satellite imagery difficult to obtain. A mosaic image created from the map, which was collected during the 2000 Shuttle Radar Topography Mission, is available on the JPL Planetary Photojournal at: http://photojournal.jpl.nasa.gov/catalog/PIA03364

Hyperbaric treatment on the cheap

Hand me a cheap plastic bag, an oxygen tank and some low-tech sensors and I’ll give you … well … I’ll give you them back. But a team from Sandia National Laboratory and a California company has combined the three into an inexpensive wound-healing device that the U.S. military says it plans to license for active and retired personnel. Think of it as a low-rent — but effective — hyperbaric chamber. But instead of costing $1 million to build and $1,500 per treatment, the whole shebang can be had for about $185.

Monkey see: MRI technique finds big differences in human, primate sight

Don't look at me, I'm hideous. Researchers in Ohio say they’ve developed a way to use a decade-old imaging technology to directly compare the brains of monkeys and humans. Specifically, they used MRIs to compare parts of the monkey and human brains — the visual cortex — concerned with processing visual information. “Implicit in the neuroscience community was that the monkey cortex is a good model for the human cortex,” said one of the researchers. “Scientists didn’t have any choice but to make that assumption, as the monkey brain was the only model we had to work with.” But with the MRI they’ve found that there are in fact big differences.

Sandia, Cray, AMD team for Opteron-based supercomputer

Intel-rival Advanced Micro Devices got a nice science win Monday when Sandia National Laboratory and Cray Inc. said they would build a supercomputer capable 40 trillion calculations per second using AMD’s forthcoming Opteron processor. Ten thousand of them, to be precise. Total cost: $90 million. Sandia says it will use the computing heavyweight for “modeling and simulation of complex problems that were only recently thought impractical, if not impossible.”

Screening technique may speed hunt for genes

The hunt to find a gene that causes a disease typically costs hundreds of thousands of dollars and requires years of research – and it still may fail to turn up the sought-after culprit, driving the research back to square one. The result is that while the genes involved in a few inherited diseases such as cystic fibrosis have been identified, many have not. Now, two scientists say they may have found a way to make the search more economical and speed it up. In an article to appear online in the Proceedings of the National Academy of Sciences next week, scientists from the University of Florida and Purdue University report merging two established genetic-screening techniques to create one that’s better. The new technique narrows the pool of “candidate” genes in a study from thousands of possibilities to fewer than 100 – perhaps as few as 20.

PC group-think reports first success

For the first time, a distributed computing experiment has produced significant results that have been published in a scientific journal. Writing in the online edition of Nature magazine, Stanford University scientists describe how they — with the help of 30,000 personal computers — successfully simulated part of the complex folding process that a typical protein molecule undergoes to achieve its unique, three-dimensional shape.

Fractals Help Researchers Design Antennas for New Wireless Devices

Antennas for the next generation of cellphones and other wireless communications devices may bear a striking resemblance to the Santa Monica Mountains or possibly the California coastline.
That’s because UCLA researchers are using fractals ? mathematical models of mountains, trees and coastlines ? to develop antennas for next-generation cellphones, cars and mobile communications devices. These antennas need to be miniature and be able to operate at multiple frequencies simultaneously.

New planet detection technique can spot even small worlds around distant stars

An extrasolar planet has been discovered using a new technique that will allow astronomers to detect planets no other current method can. Planets around other stars have been previously detected only by the effect they have on their parent star, limiting the observations to large, Jupiter-like planets and those in very tight orbits. The new method uses the patterns created in the dust surrounding a star to discern the presence of a planet that could be as small as Earth or in an orbit so wide that it would take hundreds of years to observe its effect on its star.

Gene therapy appears to help cancer pain

It’s one of those stories that simultaneously gives great hope but also a little dread. Researchers in Pennsylvania say they’ve successfully stimulated the production of a pain-blocking protein in mice by using a modified herpes virus to attach the appropriate genes onto the animals’ DNA. That’s potentially terrific news. If the same technique held true in humans, it could offer a new way to treat the devastating pain associated with some forms of cancer, such as bone cancer. Of course, a hell of a lot of mice were bred specifically develop the extremely painful bone tumors, just so the technique could be tested. It’s no doubt a necessary sacrifice, but one that shouldn’t be overlooked entirely. You don’t have to be a wacko member of PETA to spare a thought for the millions of mice and other lab animals that are sacrificed each year so humans can live healthier lives.