Monday, October 19, 2015

Science X Newsletter Week 42

Dear Reader ,

Here is your customized Phys.org Newsletter for week 42:

System that replaces human intuition with algorithms outperforms human teams

Big-data analysis consists of searching for buried patterns that have some kind of predictive power. But choosing which "features" of the data to analyze usually requires some human intuition. In a database containing, say, the beginning and end dates of various sales promotions and weekly profits, the crucial data may not be the dates themselves but the spans between them, or not the total profits but the averages across those spans.

Sea level rise will swallow Miami, New Orleans, study finds

Say goodbye to Miami and New Orleans. No matter what we do to curb global warming, these and other beloved US cities will sink below rising seas, according to a study Monday.

Engineers create artificial skin that can send pressure sensation to brain cell

Stanford engineers have created a plastic "skin" that can detect how hard it is being pressed and generate an electric signal to deliver this sensory input directly to a living brain cell.

Global marine analysis suggests food chain collapse

A world-first global analysis of marine responses to climbing human CO2 emissions has painted a grim picture of future fisheries and ocean ecosystems.

Team extends the lifetime of atoms using a mirror

Researchers at Chalmers University of Technology have succeeded in an experiment where they get an artificial atom to survive ten times longer than normal by positioning the atom in front of a mirror. The findings were recently published in the journal Nature Physics.

Latest experiment at Large Hadron Collider reports first results

After a two-year hiatus, the Large Hadron Collider, the largest and most powerful particle accelerator in the world, began its second run of experiments in June, smashing together subatomic particles at 13 teraelectronvolts (TeV)—the highest energy ever achieved in a laboratory. Physicists hope that such high-energy collisions may produce completely new particles, and potentially simulate the conditions that were seen in the early universe.

Meteorite impact turns silica into stishovite in a billionth of a second

The Barringer meteor crater is an iconic Arizona landmark, more than 1km wide and 170 metres deep, left behind by a massive 300,000 tonne meteorite that hit Earth 50,000 years ago with a force equivalent to a ten megaton nuclear bomb. The forces unleashed by such an impact are hard to comprehend, but a team of Stanford scientists has recreated the conditions experienced during the first billionths of a second as the meteor struck in order to reveal the effects it had on the rock underneath.

What is quantum in quantum thermodynamics?

(Phys.org)—A lot of attention has been given to the differences between the quantum and classical worlds. For example, quantum entanglement, superposition, and teleportation are purely quantum phenomena with no classical counterparts. However, when it comes to certain areas of thermodynamics—specifically, thermal engines and refrigerators—quantum and classical systems so far appear to be nearly identical. It seems that the same thermodynamic laws that govern the engines in our vehicles may also accurately describe the tiniest quantum engines consisting of just a single particle.

Mathematicians find 'magic key' to drive Ramanujan's taxi-cab number

Taxi-cab numbers, among the most beloved integers in math, trace their origins to 1918 and what seemed like a casual insight by the Indian genius Srinivasa Ramanujan. Now mathematicians at Emory University have discovered that Ramanujan did not just identify the first taxi-cab number - 1729 - and its quirky properties. He showed how the number relates to elliptic curves and K3 surfaces - objects important today in string theory and quantum physics.

Bubble plumes off Washington, Oregon suggest warmer ocean may be releasing frozen methane

Warming ocean temperatures a third of a mile below the surface, in a dark ocean in areas with little marine life, might attract scant attention. But this is precisely the depth where frozen pockets of methane 'ice' transition from a dormant solid to a powerful greenhouse gas.

Researchers suggest living in 'eternal summer' may be adversely impacting our health

(Phys.org)—A team of researchers at the University of Aberdeen in the U.K. has had a paper published in the journal Proceedings of the Royal Society B, outlining what they describe as the dangers of living in an "eternal summer." By artificially changing the environment we live in, they argue, we may be working against health related bodily systems that have evolved over many years to protect us from dangers unique to each season.

Physicists trace origin of electromagnetic interaction to Dirac equation

An international group of physicists has traced the origin of an electromagnetic interaction to the Dirac equation, a fundamental equation of quantum physics.

Researchers use engineered viruses to provide quantum-based enhancement of energy transport

Nature has had billions of years to perfect photosynthesis, which directly or indirectly supports virtually all life on Earth. In that time, the process has achieved almost 100 percent efficiency in transporting the energy of sunlight from receptors to reaction centers where it can be harnessed—a performance vastly better than even the best solar cells.

Affordable camera reveals hidden details invisible to the naked eye

Peering into a grocery store bin, it's hard to tell if a peach or tomato or avocado is starting to go bad underneath its skin.

A particle purely made of nuclear force

Scientists at TU Wien (Vienna) have calculated that the meson f0(1710) could be a very special particle – the long-sought-after glueball, a particle composed of pure force.

Is black phosphorous the next big thing in materials?

A new experimental revelation about black phosphorus nanoribbons should facilitate the future application of this highly promising material to electronic, optoelectronic and thermoelectric devices. A team of researchers at the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab) has experimentally confirmed strong in-plane anisotropy in thermal conductivity, up to a factor of two, along the zigzag and armchair directions of single-crystal black phosphorous nanoribbons.

On the precision frontier: A new calculation holds promise for new physics

A team of theoretical high-energy physicists in the Fermilab Lattice and MILC Collaborations has published a new high-precision calculation that could significantly advance the indirect search for physics beyond the Standard Model (SM). The calculation applies to a particularly rare decay of the B meson (a subatomic particle), which is sometimes also called a "penguin decay" process.

Discovery about protein structure opens window on basic life process

Biochemists at Oregon State University have made a fundamental discovery about protein structure that sheds new light on how proteins fold, which is one of the most basic processes of life.

Biochemists uncover structure of cellular memory mechanism

Calcium is a crucial element in the body that controls thought, movement and other bodily functions. These events are directed by specialized proteins called ion channels that allow the flow of calcium ions in and out of cells and among cell compartments. For years, scientists have been unsure how calcium ion channels function.

Measurements of dinosaur body temperatures shed new light on 150-year debate

Were dinosaurs really fast, aggressive hunters like the ones depicted in the movie "Jurassic World"? Or did they have lower metabolic rates that made them move more like today's alligators and crocodiles? For 150 years, scientists have debated the nature of dinosaurs' body temperatures and how those temperatures influenced their activity levels.


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