الاثنين، 31 مارس 2014

ScienceDaily: Top News

ScienceDaily: Top News

Why we miss subtle visual changes, and why it keeps us sane

Posted: 30 Mar 2014 12:15 PM PDT

Ever notice how Harry Potter's T-shirt abruptly changes from a crewneck to a henley shirt in 'The Order of the Phoenix,' or how in 'Pretty Woman,' Julia Roberts' croissant inexplicably morphs into a pancake? Don't worry if you missed those continuity bloopers. Vision scientists have discovered an upside to the brain mechanism that can blind us to subtle changes in movies and in the real world.

Northern and southern hemisphere climates follow the beat of different drummers

Posted: 30 Mar 2014 12:13 PM PDT

Over the last 1000 years, temperature differences between the Northern and Southern Hemispheres were larger than previously thought. Using new data from the Southern Hemisphere, researchers have shown that climate model simulations overestimate the links between the climate variations across the Earth with implications for regional predictions.

Carbohydrate digestion and obesity strongly linked

Posted: 30 Mar 2014 12:13 PM PDT

New research indicates that obesity in the general population may be genetically linked to how our bodies digest carbohydrates. People usually have two copies of the gene AMY1, but in some regions of our DNA there can be variability in the number of copies a person carries, which is known as copy number variation. The number of copies of AMY1 can be highly variable between people, and it is believed that higher numbers of copies of the salivary amylase gene have evolved in response to a shift towards diets containing more starch since prehistoric times.

Earth's dynamic interior: Multiple compositional components of Earth's deep mantle carried up to surface

Posted: 30 Mar 2014 12:12 PM PDT

Seeking to better understand the composition of the lowermost part of Earth's mantle, located nearly 2,900 kilometers (1,800 miles) below the surface, researchers have developed new simulations that depict the dynamics of deep Earth. These could be used to explain the complex geochemistry of lava from hotspots such as Hawaii.

Heat‐conducting polymer cools hot electronic devices at 200 degrees C

Posted: 30 Mar 2014 12:12 PM PDT

By harnessing an electropolymerization process to produce aligned arrays of polymer nanofibers, researchers have developed a thermal interface material able to conduct heat 20 times better than the original polymer. The material can operate at up to 200 degrees Celsius.

Celiac disease linked to increased risk of coronary artery disease

Posted: 29 Mar 2014 02:51 PM PDT

People with celiac disease may have a near two-fold increased risk of coronary artery disease compared with the general population, according to research. The study is the first to look at the association between celiac disease and coronary artery disease and adds to the evolving understanding of how systemic inflammation and autoimmune processes might influence cardiovascular disease development. Data also showed a slightly higher risk of stroke among people with celiac disease compared to controls.

Obesity prevention programs can lower kids' blood pressure, even if they don't reduce body fat

Posted: 28 Mar 2014 02:50 PM PDT

A systematic review and meta-analysis of published studies of the effect of child obesity intervention programs on blood pressure has found that whether such programs prevented obesity or not, many of them reduced blood pressure in children. Even modest elevations in the BP of adolescents, according to recent research, can pose cardiovascular problems later in life.
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