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Science News for September 9, 2010


A tectonic zip

The February earthquake in Concepción, Chile, followed a predictable pattern of stress accumulation, correlating highly with GPS observations. This study offers an optimistic perspective on the predictability of earthquake magnitudes and fracture patterns, reducing the likelihood of future tremors in the region.

SourceHelmholtz Association·JournalNature·DateSep 9, 2010

There is more to motor imagery than mental simulation

Researchers found that stroke patients with severe motor impairments used alternative mental strategies to complete tasks, suggesting a more complex phenomenon than previously thought. The study suggests that motor imagery may be a key factor in creative problem-solving and innovation.

SourceElsevier·JournalCortex·DateSep 9, 2010

Bionic speech recognition

Researchers developed a hybrid approach combining bionic wavelet transform and recurrent neural network for improved speech enhancement. The method showed significant noise reduction without compromising intelligibility, achieving a 12 dB increase in signal-to-noise ratio.

SourceInderscience Publishers·JournalInternational Journal of Signal and Imaging Systems Engineering·DateSep 9, 2010

Health reform fails the disadvantaged

A new study finds that US government health reforms have improved insurance coverage and reduced financial barriers to care, but failed to address disparities in access to care and self-rated health. The research suggests that health reform policies should focus on broader social determinants of health to advance health equity.

SourceSpringer·JournalJournal of General Internal Medicine·DateSep 9, 2010

AGU journal highlights

Scientists are studying how landmass shape affects Arctic sea ice extent, estimating rainfall interception in rainforests, and measuring mountain building rates. Landmass geometry influences Arctic sea ice growth, while forest canopy evaporation accounts for significant water resources loss. Researchers also investigate fault zone resp...

SourceAmerican Geophysical Union·JournalGeophysical Research Letters·DateSep 9, 2010

Pediatric vaccine stockpile policies need to be revisited, researcher says

Research suggests that the current six-month rotating vaccine stockpile policy may not be optimal for achieving herd immunity. A new stochastic model proposes flexible policies to minimize vaccine shortage risks while maintaining coverage rates. The study's findings highlight the need for differentiated stockpile levels based on diseas...

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalJournal of Industrial and Management Optimization·DateSep 9, 2010

OU study on genetics in fruit flies leads to new method for understanding brain function

University of Oklahoma researchers have developed a new method for understanding brain function in humans, leveraging advances in genetic techniques to manipulate small subsets of brain cells. This breakthrough has significant implications for studies of human neurological diseases, including Alzheimer's and Parkinson's disease.

SourceUniversity of Oklahoma·JournalProceedings of the National Academy of Sciences·DateSep 9, 2010

Random numbers game with quantum dice

Researchers at Max Planck Institute for Physics of Light create device generating true random numbers using vacuum fluctuations, crucial for secure encryption and economic simulations. The device exploits quantum mechanics' inherent randomness to produce unpredictable outcomes.

SourceMax-Planck-Gesellschaft·JournalNature Photonics·DateSep 9, 2010

Southern soils mitigate manure microbes

A new study found low levels of bacteria in soils outside fields sprayed with swine manure, while internal soils showed higher nutrient levels but lower pathogen levels. The research suggests that manure management plans have been effective in reducing bacterial risks.

SourceAmerican Society of Agronomy·JournalJournal of Environmental Quality·DateSep 9, 2010

Keeping stem cells from changing fates

A study published in Cell Stem Cell reveals that NURF, an enzyme that regulates DNA packaging, allows specific genes to be turned on and off in stem cells. This dynamic structure enables stem cells to maintain their potency and prevent differentiation into other cell types.

SourceJohns Hopkins Medicine·JournalCell Stem Cell·DateSep 9, 2010

Simplified clinical tool affects treatment decisions for heart health

A simplified clinical tool has led to the reclassification of millions of Americans into different risk groups, potentially affecting their treatment. The study found that 15% of adults were reclassified, with 10% moving to higher-risk groups and 5% to lower-risk groups, leading to potential over-treatment or under-treatment.

SourceSpringer·JournalJournal of General Internal Medicine·DateSep 9, 2010

Inflicting greater harm judged to be less harmful

Researchers validate sentiment that a single death is more tragic than a million, as people form vivid mental representations of individual victims. The scope-severity paradox exists in judgments of harm, leading to harsher punishments for crimes with identifiable victims.

SourceSAGE·JournalSocial Psychological and Personality Science·DateSep 9, 2010

High stress hormone levels linked to increased cardiovascular mortality

A new study published in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism has found that high levels of the stress hormone cortisol are strongly associated with an increased risk of cardiovascular death among both healthy individuals and those with pre-existing cardiovascular disease. The study, which evaluated ov...

SourceThe Endocrine Society·JournalThe Journal of Clinical Endocrinology & Metabolism·DateSep 9, 2010

Mental maturity scan tracks brain development

Researchers at WashU Medicine have developed a new method to track brain development in children using functional MRI scans, which may shed light on psychological and developmental disorders. The approach uses mathematical analysis to identify abnormal brain function, enabling early detection and potential treatment.

SourceWashU Medicine·JournalScience·DateSep 9, 2010

Biofeedback for your brain?

Researchers found that individuals can learn to control the activity of specific brain regions when receiving fMRI feedback signals. The study, published in Biological Psychiatry, used functional magnetic resonance imaging (fMRI) to assess visual emotional stimuli and demonstrated the ability to modulate the response to aversive stimuli.

SourceElsevier·JournalBiological Psychiatry·DateSep 9, 2010

The brain needs to remember faces in 3-dimensions

Researchers investigated familial prosopagnosia, a condition where individuals have trouble recognizing faces. The study found that changes in lighting conditions and viewing angles affected their ability to recognize faces, suggesting an inability to form robust mental representations of faces.

SourceElsevier·JournalCortex·DateSep 9, 2010