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A place to learn and discuss the latest research with others
A place to learn and discuss the latest research with others

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Anyone care to explain these forces further?
Amazing bead chain experiment in slow motion

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A Brief History of Adaptive Optics

An example of military technology that has advanced so much in so many other fields of research. This isn't anything like advocacy for the military; only an observation that people, throughout history, it appears, begin to think only when they are under some sort of threat. History also shows that, after the threat is over, they begin to think BIG.

An excerpt from the article.

"Adaptive optics has really revolutionized so many fields of astronomy," says Andrea Ghez, an astronomer at the University of California, Los Angeles. But such systems did not start out as tools for astronomers. "It was part of the strategic defense thinking of the nation, of what we could do to get better images of what was out in space," says Robert Duffner, author of The Adaptive Optics Revolution: A History.

During the Cold War the United States became concerned that the Soviet Union might be developing weapons that would be put into orbit. "The Air Force was interested in using telescopes on the ground to look up through the atmosphere to get clearer images of space objects — mainly satellites and missiles," says Duffner.

Full story here:

#Science   #Research   #History   #Optics  

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“I never expected the microbiome was linked.”

Scientists have discovered the first mechanism that links obesity to cancer. The gut bacteria of obese mice unleash high levels of an acid that promotes liver cancer by damaging DNA, they've found.

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Get Some Rest!
Tired and Edgy? Sleep Deprivation Boosts Anticipatory Anxiety

Neuroscientists have found that sleep deprivation amplifies anticipatory anxiety by firing up the brain’s amygdala and insular cortex, regions associated with emotional processing. The resulting pattern mimics the abnormal neural activity seen in anxiety disorders. Furthermore, their research suggests that innate worriers – those who are naturally more anxious and therefore more likely to develop a full-blown anxiety disorder – are acutely vulnerable to the impact of insufficient sleep.

More at

The research will be published in the Journal of Neuroscience.

This MRI scan highlights the location of the amygdala in the brain. #neuroscience  

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Survivor of Stellar Collision Is New Type of Pulsating Star

A team of astronomers from the UK, Germany and Spain have observed the remnant of a stellar collision and discovered that its brightness varies in a way not seen before on this rare type of star. By analysing the patterns in these brightness variations, astronomers will learn what really happens when stars collide.

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Artist's impression of the eclipsing, pulsating binary star J0247-25. (Credit: Keele University)

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How Solar Systems are formed : It’s always sobering to remember how much we still don’t know about the universe. Despite finding hundreds of exoplanetary systems and numerous stars surrounded by proto-planetary disks of gas and dust, it’s still not clear how the latter become the former. But observations by the recently-opened Atacama Large Millimeter/submillimeter Array (ALMA) have shed light on this question by finding a “safe haven” for growing pre-planets around a relatively nearby star.

But because planets clearly exist, something must be providing these larger dust particles an opportunity to clump together in just the right way. Astronomers had suggested the existence of “dust traps,” but none had ever been found. These would be holding pens for the dust in the form of small vortices, which could serve to strongly concentrate larger dust grains. So concentrated, the dust could accumulate and grow into kilometer-sized parts, paving the way for planet formation.

Now the star system Oph IRS 48, about 390 light-years away, appears to display just that: a clear clump of larger dust particles within the disk. The crescent-shaped area on one side of the disk is, clearly, a dust trap. It produces a small vortex in the disk, basically an eddy in the current of material flowing around the star. Another large object (either a large planet or a brown dwarf) has carved out a gap in the disk, making it possible for such a vortex to form from the turbulence at the edge of the gap. The results are reported today in Science.

Article Link:

More about ALMA here:

Picture on Left: This artist’s impression shows the dust trap in the system Oph-IRS 48. Credit: ESO/L. Calçada

Picture on Right: the Atacama Large Millimeter/submillimeter Array (ALMA).

#science #scienceeveryday #planet #solarsystem #dust #matter #alma  
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Via +Kathy Morlock 
Researchers gain new molecular-level understanding of the brain's recovery after stroke

A specific MicroRNA, a short set of RNA (ribonuclease) sequences, naturally packaged into minute (50 nanometers) lipid containers called exosomes, are released by stem cells after a stroke and contribute to better neurological recovery according to a new animal study by Henry Ford Hospital researchers.

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Wine Not?

The French weren't the first to make wine? Mon dieu! But as anyone who has sipped a Bordeaux, Champagne or Burgundy can tell you, the French got pretty good at it once they learned how. And thanks to some molecular archaeology, researchers can now confirm they picked up these skills as early as 425 B.C.

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