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3-D printing turns nanomachines into life-size workers

EurekAlert! - Mar, 03/21/2017 - 22:00
Dartmouth researchers unlock the key to transforming microscopic nanorings into smart materials that perform work at human-scale.

Paying for pain: What motivates tough mudders and other weekend warriors?

EurekAlert! - Mar, 03/21/2017 - 22:00
Why do people pay for experiences deliberately marketed as painful? According to a new study in the Journal of Consumer Research, consumers will pay big money for extraordinary -- even painful -- experiences to offset the physical malaise resulting from today's sedentary lifestyles.

Costly curves? Overweight consumers spend more when reminded of thinness

EurekAlert! - Mar, 03/21/2017 - 22:00
Popular media mirror Western culture's fixation with being thin. According to a new study in the Journal of Consumer Research, even subtle reminders of idealized bodies can encourage overweight consumers to overspend.

Lack of leisure: Is busyness the new status symbol?

EurekAlert! - Mar, 03/21/2017 - 22:00
Long gone are the days when a life of material excess and endless leisure time signified prestige. According to a new study in the Journal of Consumer Research, Americans increasingly perceive busy and overworked people as having high status.

High-risk medical devices: IQWiG sees no potential in 6 of 8 cases

EurekAlert! - Mar, 03/21/2017 - 22:00
Only case series without informative value are available for most indications. A plausible mode of action is insufficient to attribute a potential.

MRI-guided high-intensity focused ultrasound therapy for uterine fibroids has potential

EurekAlert! - Mar, 03/21/2017 - 22:00
IQWiG has attributed a potential for a benefit to a new treatment method according to §137e SGB V. A testing study has been initiated. Numerous other assessments had no consequences.

Ultrafast measurements explain quantum dot voltage drop

EurekAlert! - Mar, 03/21/2017 - 22:00
Solar cells and photodetectors could soon be made from new types of materials based on semiconductor quantum dots, thanks to new insights based on ultrafast measurements capturing real-time photoconversion processes.

Scientists identify a new way gut bacteria break down complex sugars

EurekAlert! - Mar, 03/21/2017 - 22:00
New light has been shed on the functioning of human gut bacteria which could help to develop medicines in the future to improve health and well-being.

It's a fish eat tree world

EurekAlert! - Mar, 03/21/2017 - 22:00
An international team of scientists analyzed 147 northern lakes and found that many rely on nutrients from tree leaves, pine needles, and other land-grown plants to feed aquatic life. The study, published today in Science Advances, offers the most comprehensive analysis to-date on terrestrial subsidies to lake food webs.

Molecular 'treasure maps' to help discover new materials

EurekAlert! - Mar, 03/21/2017 - 22:00
Scientists at the University of Southampton working with colleagues at the University of Liverpool have developed a new method which has the potential to revolutionise the way we search for, design and produce new materials.

Humans and smartphones may fail frequently to detect face morph photos

EurekAlert! - Mar, 03/21/2017 - 22:00
Researchers at the University of York have demonstrated that both humans and smartphones show a degree of error in distinguishing face morph photos from their 'real' faces on fraudulent identity cards.

Making 'mulch' ado of ant hills

EurekAlert! - Mar, 03/21/2017 - 22:00
Research undertaken by scientists in China reveals that ants are hardworking and beneficial insects. In the activities of their daily lives, ants help increase air, water flow, and organic matter in soil. The work done by ants even forms a type of mulch that helps hold water in the soil.

New study shakes the roots of the dinosaur family tree

EurekAlert! - Mar, 03/21/2017 - 22:00
More than a century of theory about the evolutionary history of dinosaurs has been turned on its head following the publication of new research from scientists at the University of Cambridge and Natural History Museum in London. Their work suggests that the family groupings need to be rearranged, redefined and renamed and also that dinosaurs may have originated in the northern hemisphere rather than the southern, as current thinking goes.

First mutations in human life discovered

EurekAlert! - Mar, 03/21/2017 - 22:00
The earliest mutations of human life have been observed by researchers at the Wellcome Trust Sanger Institute and their collaborators. Analyzing genomes from adult cells, the scientists could look back in time to reveal how each embryo developed. Published in Nature today, the study shows that from the two-cell stage of the human embryo, one of these cells becomes more dominant than the other and leads to a higher proportion of the adult body.

Study identifies brain cells involved in Pavlovian response

EurekAlert! - Mar, 03/21/2017 - 22:00
A UCLA study has traced the Pavlovian response to a small cluster of brain cells -- the same neurons that go awry during Huntington's disease, Parkinson's disease and Tourette's syndrome. The research could one day help neuroscientists find new approaches to diagnosing and treating these disorders.

Scientists identify brain circuit that drives pleasure-inducing behavior

EurekAlert! - Mar, 03/21/2017 - 22:00
MIT neuroscientists have discovered a brain circuit that responds to rewarding events. Scientists have long believed that the central amygdala, a structure located deep within the brain, is linked with fear and responses to unpleasant events, but the new study finds that most of the neurons here are involved in the reward circuit.

Surprising new role for lungs: Making blood

EurekAlert! - Mar, 03/21/2017 - 22:00
Using video microscopy in the living mouse lung, UC San Francisco scientists have revealed that the lungs play a previously unrecognized role in blood production.

Lack of staffing, funds prevent marine protected areas from realizing full potential

EurekAlert! - Mar, 03/21/2017 - 22:00
Marine protected areas (MPAs) are an increasingly popular strategy for protecting marine biodiversity, but a new global study demonstrates that widespread lack of personnel and funds are preventing MPAs from reaching their full potential. Only 9 percent of MPAs reported having adequate staff.The findings are published in the journal Nature on March 22.

Scientists evade the Heisenberg uncertainty principle

EurekAlert! - Mar, 03/21/2017 - 22:00
ICFO Researchers report the discovery of a new technique that could drastically improve the sensitivity of instruments such as magnetic resonance imagers (MRIs) and atomic clocks. The study, published in Nature, reports a technique to bypass the Heisenberg uncertainty principle. This technique hides quantum uncertainty in atomic features not seen by the instrument, allowing the scientists to make very high precision measurements.

Tiller the Hun? Farmers in Roman Empire converted to Hun lifestyle -- and vice versa

EurekAlert! - Mar, 03/21/2017 - 22:00
New archaeological analysis suggests people of Western Roman Empire switched between Hunnic nomadism and settled farming over a lifetime. Findings may be evidence of tribal encroachment that undermined Roman Empire during 5th century AD, contributing to its fall.

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