2015년 2월 16일 월요일

Science X Newsletter Week 07


No Big Bang? Quantum equation predicts universe has no beginning

(Phys.org) —The universe may have existed forever, according to a new model that applies quantum correction terms to complement Einstein's theory of general relativity. The model may also account for dark matter and dark energy, resolving multiple problems at once.

Earth's surprise inside: Geologists unlock mysteries of the planet's inner core

Seismic waves are helping scientists to plumb the world's deepest mystery: the planet's inner core.

How big is the biggest star we have ever found?

The universe is such a big place that it is easy to get baffled by the measurements that astronomers make. The size of UY Scuti, possibly one of the largest stars we have observed to date, is certainly baffling.

Iconic graph at center of climate debate

The "Hockey Stick" graph, a simple plot representing temperature over time, led to the center of the larger debate on climate change, and skewed the trajectory of at least one researcher, according to Michael Mann, Distinguished Professor of Meteorology, Penn State.

On quantum scales, there are many second laws of thermodynamics

New research from UCL and the Universities of Gdansk, Singapore, and Delft has uncovered additional second laws of thermodynamics which complement the ordinary second law of thermodynamics, one of the most fundamental laws of nature. These new second laws are generally not noticeable except on very small scales, at which point, they become increasingly important.

Dark Energy Camera unveils small objects in solar system

The 570-megapixel Dark Energy Camera, built at DOE's Fermilab and mounted on the 4-meter Victor Blanco Telescope in Chile, delivers some of the most detailed images of celestial objects. While about a third of the camera's observing time goes to scientists working on the Dark Energy Survey, dozens of other teams share the remaining time. While the majority of them focus on observing objects far away, five groups recently highlighted in Symmetry magazine are investigating things close to Earth, looking for "space junk" that could damage satellites, large rocks that could hit Earth and other objects traversing our solar system.

Protein linked to longevity and enhanced cognition protects against Alzheimer's symptoms

Scientists from the Gladstone Institutes and the University of California, San Francisco report in the Journal of Neuroscience that raising levels of the life-extending protein klotho can protect against learning and memory deficits in a mouse model of Alzheimer's disease. Remarkably, this boost in cognition occurred despite the accumulation of Alzheimer-related toxins in the brain, such as amyloid-beta and tau.

Scientists get first glimpse of a chemical bond being born

Scientists have used an X-ray laser at the Department of Energy's SLAC National Accelerator Laboratory to get the first glimpse of the transition state where two atoms begin to form a weak bond on the way to becoming a molecule.

Where did the Big Bang happen?

Close your eyes and imagine the Big Bang. That first moment, where all the energy, matter and light came into existence. It's an explosion right? Fire, debris, sinks, marmots and anvils flying past the camera in an ever expanding cloud of hot gas.

Space-time theory may reconcile black hole conundrum

We've come a long way in 13.8 billion years; but despite our impressively extensive understanding of the Universe, there are still a few strings left untied. For one, there is the oft-cited disconnect between general relativity, the physics of the very large, and quantum mechanics, the physics of the very small. Then there is problematic fate of a particle's intrinsic information after it falls into a black hole. Now, a new interpretation of fundamental physics attempts to solve both of these conundrums by making a daring claim: at certain scales, space and time simply do not exist.

Exotic states materialize with supercomputers

Scientists used supercomputers to find a new class of materials that possess an exotic state of matter known as the quantum spin Hall effect. The researchers published their results in the journal Science in December 2014, where they propose a new type of transistor made from these materials.

Interstellar technology throws light on spinning black holes

The team responsible for the Oscar-nominated visual effects at the centre of Christopher Nolan's epic, Interstellar, have turned science fiction into science fact by providing new insights into the powerful effects of black holes.

Possible discovery in 2015 of a new particle in physics

The world's largest atom-smasher could help physicists understand mysterious dark matter in the universe, and later this year it may offer a discovery even more fascinating than the Higgs-Boson, researchers say.

New study identifies key design features that boost violins' acoustic power

Some of the most prized violins in the world were crafted in the Italian workshops of Amati, Stradivari, and Guarneri—master violinmaking families from the 17th and 18th centuries who produced increasingly powerful instruments in the renaissance and baroque musical eras. These violins, worth millions of dollars today, represent the Cremonese period—what is now considered the golden age of violinmaking.

Over 100 banks hit by sophisticated cyberattack: report

A sophisticated global cyberattack struck more than 100 banks in 30 countries stealing hundreds of millions of dollars, The New York Times reported Saturday.

Amber fossil links earliest grasses, dinosaurs and fungus used to produce LSD

A perfectly preserved amber fossil from Myanmar has been found that provides evidence of the earliest grass specimen ever discovered - about 100 million years old - and even then it was topped by a fungus similar to ergot, which for eons has been intertwined with animals and humans.

Small-scale challenges to the cold dark matter model

(Phys.org)—A collaborative of researchers from several U.S. universities has published a new paper that explains the major contradictions presented by the prevailing cold dark matter (CDM) cosmological model, and proposes approaches for reconciling cosmological observations with the CDM model's predictions. The paper, titled "Cold dark matter: Controversies on small scales," was published in the Proceedings of the National Academy of Sciences in December.

World's first rotary 3-D printer-cum-scanner unveiled at AAAS meeting

Nanyang Technological University's (NTU Singapore) start-up Blacksmith Group today launched the world's first compact 3D printer that can also scan items into digitised models.

Breakthrough may lead to industrial production of graphene devices

With properties that promise faster computers, better sensors and much more, graphene has been dubbed the 'miracle material'. But progress in producing it on an industrial scale without compromising its properties has proved elusive. University of Groningen scientists may now have made a breakthrough. Their results will be published in the journal Nano Letters.

The sun won't die for 5 billion years, so why do humans have only 1 billion years left on Earth?

In a few billion years, the sun will become a red giant so large that it will engulf our planet. But the Earth will become uninhabitable much sooner than that. After about a billion years the sun will become hot enough to boil our oceans.



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