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Magnetic computer sensors may help study biomolecules
05-10-2007 · EurekAlert!Magnetic switches like those in computers also might be used to manipulate individual strands of DNA for high-speed applications such as gene sequencing, experiments at NIST suggest.
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Keywords: magnetic, computer, sensors, study, biomolecules, sensor, biomolecule
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- Nano-layer of ruthenium stabilizes magnetic sensors
08-03-2007 · EurekAlert!
A layer of ruthenium just a few atoms thick can be used to fine-tune the sensitivity and enhance the reliability of magnetic sensors, tests at NIST show. The nonmagnetic metal acts as a buffer between active layers of sensor materials, offering a simple means of customizing field instruments such as compasses and stabilizing the magnetization in a given direction in devices such as computer hard-disk readers.
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- Bioengineers at University of Pennsylvania devise nanoscale system to measure cellular forces
08-27-2007 · EurekAlert!
University of Pennsylvania researchers have designed a nanoscale system to observe and measure how individual cells react to external forces. By combining microfabricated cantilevers and magnetic nanowire technology to create independent, nanoscale sensors, the study showed that cells respond to outside forces and demonstrated a dynamic biological relationship between cells and their environment.
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- The sensitive side of carbon nanotubes: Creating powerful pressure sensors
10-23-2007 · EurekAlert!
Blocks of carbon nanotubes can be used to create effective and powerful pressure sensors, according to a new study by researchers at Rensselaer Polytechnic Institute. Taking advantage of the material's unique electrical and mechanical properties, researchers repeatedly squeezed a 3-millimeter nanotube block and discovered it was highly suitable for potential applications as a pressure sensor. No matter how many times or how hard they squeezed the block, it exhibited a constant, linear relationship between how much force was applied and electrical resistance.
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- Expect a warmer, wetter world this century, computer models agree
10-19-2006 · EurekAlert!
Recent heat waves, long dry spells and heavy bursts of rain and snow hint at longer-term changes to come, according to a new study based on several advanced climate models. Much of the world will face significant changes in extreme weather events by the end of this century.
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- Himalayan megaquakes powered by elastic energy in Tibetan plateau, says U of Colorado study
11-08-2006 · EurekAlert!
Computer simulations indicate that Himalayan megaearthquakes must occur every 1,000 years or so to empty a reservoir of energy in southern Tibet not released by smaller earthquakes, according to a paper that will appear in the Nov. 9 issue of the journal Nature.
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- Technology can't replace doctors' judgment in reading mammograms
12-04-2006 · EurekAlert!
Radiologists should not become too dependent on the use of computer-assisted detection (CAD) technology when reading screening mammograms because the doctors can see lesions that CAD sometimes misses. The research appears in the December issue of the American Journal of Roentgenology. It is the first study of CAD using a random sample of cases from a screened population rather than using selected cases of visible cancers.
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- U of M study shows teens become less active as they grow older
02-19-2007 · EurekAlert!
As they grow older, teenagers are spending more time in front of the computer and television and less time participating in physical activities, according to researchers at the University of Minnesota School of Public Health.
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- Test for visual acuity could aid detection, rehabilitation of AMD
10-29-2007 · EurekAlert!
A computer-based method for evaluating the eye’s ability to distinguish object details and shape in patients with age-related macular degeneration (AMD) could provide a more accurate way to assess the effectiveness of eye surgery or vision rehabilitation interventions with devices and training, according to a Canadian study. The computer method could also vary low-, medium- and high-contrast illumination targets for testing spatial vision, which the authors say might be useful for early detection of AMD.
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- Blue dye could hold the key to super processing power
11-28-2007 · EurekAlert!
A technique for controlling the magnetic properties of a commonly used blue dye could revolutionise computer processing power, according to research published recently in Advanced Materials.
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- First-ever study to link increased mortality specifically to carbon dioxide emissions
01-03-2008 · EurekAlert!
A Stanford scientist has spelled out for the first time the direct links between increased levels of carbon dioxide in the atmosphere and increases in human mortality, using a state-of-the-art computer model of the atmosphere incorporating scores of physical and chemical environmental processes. The new findings, to be published in Geophysical Research Letters, come to light just after the Environmental Protection Agency's recent ruling against states setting specific emission standards for this greenhouse gas.
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