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  • Phys.org - News and Articles on Science and Technology
    to change the world or so we ve been told Feb 11 2016 in Nanophysics 7217 2 Physicists create first photonic Maxwell s demon Phys org Maxwell s demon a hypothetical being that appears to violate the second law of thermodynamics has been widely studied since it was first proposed in 1867 by James Clerk Maxwell But most of these studies have 13 hours ago in Quantum Physics feature 4554 3 Neanderthal DNA has subtle but significant impact on human traits Since 2010 scientists have known that people of Eurasian origin have inherited anywhere from 1 to 4 percent of their DNA from Neanderthals Feb 11 2016 in Archaeology Fossils 2084 6 Scientists glimpse Einstein s gravitational waves Update In a landmark discovery for physics and astronomy scientists said Thursday they have glimpsed the first direct evidence of gravitational waves ripples in the fabric of space time that Albert Einstein predicted a century Feb 11 2016 in General Physics 6437 74 Farewell Philae Earth says goodbye to comet probe Update 2 Scientists gave up Friday trying to contact robot lab Philae stubbornly silent on the surface of a comet streaking through space closing a captivating chapter in an historic quest 18 hours ago in Space Exploration 78 2 Engineers develop new flat ultralight lens that could change how cameras are designed Imagine digital cameras or smartphones without the bulky lenses or eyeglasses with lenses that are paper thin 17 hours ago in Optics Photonics 2025 2 Gravitational waves found black hole models led the way Gravitational waves were predicted by Einstein s theory of general relativity in 1916 and now almost exactly 100 years later the faint ripples across space time have been found The advanced Laser Interferometric Gravitational wave Feb 11 2016 in Astronomy 4947 67 1 2 3

    Original URL path: http://phys.org/sort/popular/1d/ (2016-02-13)
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  • Phys.org - News and Articles on Science and Technology
    UV radiation dirt heat and bacterial infections The coating Feb 02 2010 in Nanomaterials report 4 97 Researchers find new phase of carbon make diamond at room temperature Researchers from North Carolina State University have discovered a new phase of solid carbon called Q carbon which is distinct from the known phases of graphite and diamond They have also developed a technique for using Nov 30 2015 in Condensed Matter 35326 17 New Xilinx MicroBlaze Soft Processor Increases Clock Frequency By 25 Percent Xilinx Inc today announced immediate availability of the performance optimized 4 00 version of its MicroBlaze soft processor The 32 bit RISC core now operates at frequencies up to 200 MHz in Virtex 4 FPGAs delivering an May 17 2005 in 0 0 Taiwan engineers defeat limits of flash memory Phys org Taiwan based Macronix has found a solution for a weakness in flash memory fadeout A limitation of flash memory is simply that eventually it cannot be used the more cells in the memory chips are erased the Dec 02 2012 in Semiconductors weblog 0 24 Math professor s side mirror that eliminates blind spot receives US patent A side mirror that eliminates the dangerous blind spot for drivers has now received a U S patent The subtly curved mirror invented by Drexel University mathematics professor Dr R Andrew Hicks dramatically increases Jun 07 2012 in Mathematics 0 59 First ever high resolution images of a molecule as it breaks and reforms chemical bonds When Felix Fischer of the U S Department of Energy s Lawrence Berkeley National Laboratory Berkeley Lab set out to develop nanostructures made of graphene using a new controlled approach to chemical reactions the first May 30 2013 in Nanophysics 1 17 Celebrity endorsements not always a good bet study shows Phys

    Original URL path: http://phys.org/sort/popular/all/ (2016-02-13)
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  • Physicists create first photonic Maxwell's demon
    introduced in future experiments based on this one as our interests gravitate around quantum information Dahlsten said Explore further Could Maxwell s Demon Exist in Nanoscale Systems More information Mihai D Vidrighin et al Photonic Maxwell s Demon Physical Review Letters DOI 10 1103 PhysRevLett 116 050401 Also at arXiv 1510 02164 quant ph Journal reference Physical Review Letters 4554 shares feedback to editors 2016 Phys org Tweet Favorites Email Print PDF Featured Last comments Popular Detection of gravitational waves would open new window on universe Feb 10 2016 58 Gravitational waves detected 100 years after Einstein s prediction Feb 11 2016 144 Scientists discover hidden galaxies behind the Milky Way Feb 09 2016 3 GPS tracking down to the centimeter Feb 11 2016 10 A metal that behaves like water Feb 11 2016 2 more Phys org on facebook Relevant PhysicsForums posts Zeno s arrow paradox 14 minutes ago Arrows vs plate armor 24 minutes ago Wave impedance of free space 25 minutes ago Work done on a stationary bycicle 28 minutes ago Brainstorming Large scale piezoelectricity generation 1 hour ago free fall acceleration help 2 hours ago More from General Physics Related Stories Could Maxwell s Demon Exist in Nanoscale Systems June 24 2009 PhysOrg com Maxwell s demon may be making a comeback Physicists know that the demon an imaginary creature that decreases the entropy of a system cannot exist in macroscopic systems due to the energy it requires Maxwell s demon demonstration turns information into energy November 15 2010 PhysOrg com Scientists in Japan are the first to have succeeded in converting information into free energy in an experiment that verifies the Maxwell demon thought experiment devised in 1867 Scientists propose creating Maxwell s demon with two quantum dots February 1 2013 Phys org When you open your door on a cold winter day the warm air from your home and the cold air from outside begin to mix and evolve toward thermal equilibrium a state of complete entropy where the temperatures outside Maxwell s demon can use quantum information to generate work December 18 2013 Phys org In theory Maxwell s demon can decrease the entropy of a system by opening and closing a door at appropriate times to separate hot and cold gas molecules But as physicist Leó Szilárd pointed out in 1929 Study explains how Maxwell s demon uses mutual information to extract work August 4 2014 Phys org Maxwell s demon the hypothetical doorman that controls how particles travel between two chambers in an attempt to decrease entropy is at its heart a feedback controlled system The demon makes measurements Maxwell s demon as a self contained information powered refrigerator January 12 2016 In 1867 Scottish physicist James Clerk Maxwell challenged the second law of thermodynamics according to which entropy in a closed system must always increase In his thought experiment Maxwell took a closed gas container Recommended for you Physicists create first photonic Maxwell s demon February 12 2016 Phys org

    Original URL path: http://phys.org/news/2016-02-physicists-photonic-maxwell-demon.html (2016-02-13)
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  • Quantum Physics News
    Physicists create first photonic Maxwell s demon 13 hours ago 3 MyShake New app turns smartphones into worldwide seismic network 9 hours ago 0 Most precise measurement of reactor antineutrino spectrum reveals intriguing surprise 3 hours ago 0 A new form of frozen water Scientists reveal new ice with record low density 3 hours ago 0 Scientists create ultrathin semiconductor heterostructures for new technologies 11 hours ago 0 more More news Other news Physicists experimentally realize a quantum Hilbert hotel Phys org In 1924 the mathematician David Hilbert described a hotel with an infinite number of rooms that are all occupied Demonstrating the counterintuitive nature of infinity he showed that the hotel could still accommodate Quantum computer that computes without running sets efficiency record Phys org Due to quantum effects it s possible to build a quantum computer that computes without running or as the scientists explain the result of a computation may be learned without actually running the computer Scientists experimentally demonstrate 140 year old prediction A gas in perpetual non equilibrium Phys org In 1876 the Austrian physicist Ludwig Boltzmann noticed something surprising about his equations that describe the flow of heat in a gas Usually the colliding gas particles eventually reach a state of thermal Device can theoretically trap a light bit for an infinite amount of time Phys org Researchers have designed a nanoscale device that under ideal conditions can confine a bit of light that is light with a single precise energy value for an infinite amount of time Although a physically 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 Researchers take two big steps toward quantum computing Phys org Spooky action at a distance Einstein s famous dismissive characterization of quantum entanglement has long been established as a physical phenomenon and researchers are keen to develop practical applications Entanglement lifetime extended orders of magnitude using coupled cavities Phys org Entangled qubits form the basic building blocks of quantum computers and other quantum technologies but when qubits lose their entanglement they lose their quantum advantage over classical bits Unfortunately Quantum process demonstrates superposition of ordered events Phys org In a quantum superposition a quantum object can be in two incompatible states at the same time which is famously illustrated by Schrödinger s dead and alive cat Recent research has shown that it s possible Physicists demonstrate new violations of local realism Phys org Erwin Schrödinger once famously stated that quantum entanglement is the characteristic trait of quantum mechanics that distinguishes it from classical theories Now in a new paper physicists have demonstrated Researchers develop new method for scaling up quantum devices Phys org When it comes to fabricating complex quantum devices one limitation is the number of wires available on the measurement systems that the quantum devices are built on Typically controlling just three or four Neural qubits Quantum cognition based on synaptic nuclear spins Phys org The pursuit of an understanding of the base machinery of the mind led early researchers to anatomical exhaustion With neuroscience now in the throes of molecular mayhem and a waning biochemical bliss physics Physicists confirm thermodynamic irreversibility in a quantum system Phys org For the first time physicists have performed an experiment confirming that thermodynamic processes are irreversible in a quantum system meaning that even on the quantum level you can t put a broken egg back Blind quantum computing method surpasses efficiency limit Phys org Demonstrating that limits were made to be broken physicists have overcome what was previously considered to be a natural and universal limit on the efficiency of a quantum cryptography task called blind quantum Macroscopic quantum phenomena discovered in ice Phys org Scientists have discovered an anomaly in the properties of ice at very cold temperatures near 20 K which they believe can be explained by the quantum tunneling of multiple protons simultaneously The finding Quantum Cheshire Cat effect may be explained by standard quantum mechanics Phys org A grin without a cat is how Lewis Carroll describes the Cheshire Cat s mysterious way of disappearing while leaving its grin behind in his 1865 classic Alice in Wonderland The fanciful character raises a First observation made of quantum tunneling diffusion of hydrogen atoms on ice Phys org As long as the temperature is above absolute zero gas molecules are always in constant random motion They may diffuse or spread out through three dimensional space or in a process called surface diffusion For faster battery charging try a quantum battery Phys org Physicists have shown that a quantum battery basically a quantum system such as a qubit that stores energy in its quantum states can theoretically be charged at a faster rate than conventional batteries Physicists investigate unusual form of quantum mechanics Phys org In a new study physicists at Penn State University have for the first time proposed a way to test a little understood form of quantum mechanics called nonassociative quantum mechanics So far all other tests MyShake New app turns smartphones into worldwide seismic network University of California Berkeley scientists are releasing a free Android app that taps a smartphone s ability to record ground shaking from an earthquake with the goal of creating a worldwide seismic detection network Most precise measurement of reactor antineutrino spectrum reveals intriguing surprise Members of the International Daya Bay Collaboration who track the production and flavor shifting behavior of electron antineutrinos generated at a nuclear power complex in China have obtained the most precise measurement A new form of frozen water Scientists reveal new ice with record low density Amid the season known for transforming Nebraska into an outdoor ice rink a University of Nebraska Lincoln led research team has predicted a new molecular form of the slippery stuff that even Mother Nature has never borne Scientists create ultrathin semiconductor heterostructures for new technologies Heterostructures

    Original URL path: http://phys.org/physics-news/quantum-physics/?utm_source=subcateg&utm_medium=link&utm_campaign=tmpl-main-l (2016-02-13)
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  • Phys.org | Feature Stories | Weblog News | Reports
    2016 in Astronomy report 75 0 Optical rogue waves reveal insight into real ones Phys org Rogue waves in the middle of the ocean often appear out of nowhere and vanish just as quickly But in their short lifetimes they can generate walls of water 15 to 30 meters 50 to 100 feet high crashing down Feb 10 2016 in General Physics feature 1352 2 How particles pack in a confined space Phys org Many biological systems involve dense packing of a large amount of material or particles in a confined space For example eukaryotes nuclei hold about two meters of DNA that is tightly wound into chromosomes Feb 10 2016 in General Physics report 1836 3 Improved nuclear magnetic resonance technique allows researchers to measure signals from a single molecule Phys org An effort by a combined team of researchers from Harvard and Ulm Universities has led to the development of an improved nuclear magnetic resonance technique that allows for better measuring the magnetic field Feb 10 2016 in General Physics report 40 0 Materials by design A radical shift in transforming bulk matter into useful technology Phys org Statistical physics the branch of physics that solves physical problem by using methods of probability theory and statistics specifically mathematical tools for large populations approximations and other Feb 10 2016 in General Physics feature 630 0 1 2 3 4 5 6 7 8 Next Researchers use genetically modified circulating tumor cells to kill other tumors Medical Xpress An international team of medical researchers has found a way to use a kind of cancer cell as a cargo vessel of sorts to kill already existing tumors In their paper published in Proceedings of the National Study suggests remarkable approach to MS treatment Medical Xpress Multiple sclerosis MS is an autoimmune inflammatory disorder in which the immune system attacks the myelin sheath enveloping and insulating the nerves A progressive disease that often results in severe Researchers making progress on understanding why people lose their hair as they age Medical Xpress Two groups of researchers working on two different projects have made inroads into understanding the cause of alopecia the gradual loss of hair during aging One team with members from Japan the U S Antibiotics may increase susceptibility to sexually transmitted infections Medical Xpress Commensal microbiota populations of bacteria that inhabit the tissues of larger organisms often have complex relationships with their hosts Researchers have been aware for some time that commensal microbiota Brain study suggests consciousness a matter of optimal degree of connectedness in neural network Medical Xpress A team of European researchers has found evidence that suggests that human consciousness is a state where the neural network that makes up the brain operates at an optimal degree of connectedness In their Google is walking Chrome for Android close up to Physical Web Google has started to support physical beacons in its Chrome browser for Android Google made the announcement to move straight ahead with plans to support Bluetooth beacons

    Original URL path: http://phys.org/editorials/ (2016-02-13)
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  • MyShake: New app turns smartphones into worldwide seismic network
    the Gordon and Betty Moore Foundation committed 3 million to further develop ShakeAlert and another 1 million for MyShake In simulated tests based on real earthquakes MyShake was able to provide timely early warning as well as or better than ShakeAlert Researchers have made other attempts to harness the public s computers or mobile phones for earthquake detection mostly using their power hungry connection to the global GPS network but it has been hard to keep users especially when software updates interfere with ease of use With an app you have access to millions of phones and the Google Play Store and Apple iTunes make is easy to distribute Allen said Allen s long term goal is to make earthquake detection so valuable that it becomes embedded in the mobile phone operating system so that everyone becomes part of the network How the app works The algorithm behind MyShake was turned into an app by programmers at the Silicon Valley Innovation Center in Mountain View Calif which is part of the Telekom Innovation Laboratories T Labs operated by Deutsche Telekom owner of T Mobile Over the past three years as many as a eight people helped develop the computer code that ties the sensors to the analysis algorithm and then uploads the data to servers at UC Berkeley This is really novel and inventive science so we spent a lot of time on analysis making sure the basics of the app were fine said Schreier the vice president of the T Labs innovation center We wanted an app that could collect the data needed but wouldn t lock up the phone or use up all the phone s memory or burn out a battery any of which would cause people not to use it Kong then tested the algorithm initially with 75 Android users from a class Allen taught as well as friends and colleagues T Labs also provided phones that Kong tested on shake tables at UC Berkeley which realistically simulate the vibrations from large quakes such as the 1989 Loma Prieta earthquake south of San Francisco The app continually monitors the phone s accelerometers and tests every motion to see if it fits the profile of an earthquake If the algorithm decides that the shaking it from a quake it immediately sends basic information to UC Berkeley the time and amplitude of the shaking and the phone s position as measured by GPS Cloud based software constantly reviews all incoming data and if at least four phones detect shaking and this represents more than 60 percent of all phones within a 10 kilometer radius of the epicenter the program confirms an earthquake The researchers cross check this with the California Integrated Seismic Network which monitors earth movement all over the state using underground seismometers Now ShakeAlert only issues alerts when four of our traditional seismic stations are triggered Allen said But if we also have mobile phone data maybe we would need only one station to trigger before

    Original URL path: http://phys.org/news/2016-02-myshake-app-smartphones-worldwide-seismic.html (2016-02-13)
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  • Earth Sciences News - Earth Science News, Space Earth Science, Space News, Science
    ago 3 MyShake New app turns smartphones into worldwide seismic network 9 hours ago 0 Most precise measurement of reactor antineutrino spectrum reveals intriguing surprise 3 hours ago 0 A new form of frozen water Scientists reveal new ice with record low density 3 hours ago 0 Scientists create ultrathin semiconductor heterostructures for new technologies 11 hours ago 0 more More news Other news Long term picture offers little solace on climate change Climate change projections that look ahead one or two centuries show a rapid rise in temperature and sea level but say little about the longer picture Today Feb 8 2016 a study published in Nature Climate Change looks New Little Ice Age coincides with fall of Eastern Roman Empire and growth of Arab Empire Researchers from the international Past Global Changes PAGES project write in the journal Nature Geoscience that they have identified an unprecedented long lasting cooling in the northern hemisphere 1500 years ago The New insights from the stalled El Nino of 2014 It may be even trickier to predict the strength of El Niño weather patterns than previously thought according to a study by Yale researchers Underground formations reveal wet past of Australia s Nullarbor Plain Phys org A team of researchers affiliated with several institutions in Australia has found evidence that suggests that a desert region in Australia experienced a relatively short burst of wetter weather approximately Researchers find new cause of strong earthquakes A geologic event known as diking can cause strong earthquakes with a magnitude between 6 and 7 according to an international research team Earthquakes on thrust faults can spread 10 times farther to a second nearby thrust fault than previously thought A team of researchers including one from the University of California Riverside has discovered that earthquake ruptures can jump much further than previously thought a finding that could have severe implications on the In the Southern Ocean a carbon dioxide mystery comes clear Twenty thousand years ago when humans were still nomadic hunters and gatherers low concentrations of carbon dioxide in the atmosphere allowed the earth to fall into the grip of an ice age But despite decades of research Scientists map movement of Greenland Ice during past 9 000 years Scientists have created the first map that shows how the Greenland Ice Sheet has moved over time revealing that ice in the interior is moving more slowly toward the edges than it has on average during the past 9 000 years Research may explain mysterious deep earthquakes in subduction zones Geologists from Brown University may have finally explained what triggers certain earthquakes that occur deep beneath the Earth s surface in subduction zones regions where one tectonic plate slides beneath another Consistency of Earth s magnetic field history surprises scientists Earth s magnetic field is generated by the motion of liquid iron in the planet s core This geodynamo occasionally reverses its polarity the magnetic north and south poles swap places The switch occurs over a few thousand Antarctic study identifies melting ice sheet s role in sea level rise Loss of ice in Antarctica caused by a warming ocean could raise global sea levels by three metres research suggests Long term global warming not driven naturally By examining how Earth cools itself back down after a period of natural warming a study by scientists at Duke University and NASA s Jet Propulsion Laboratory confirms that global temperature does not rise or fall chaotically Study zeros in on plate tectonics start date Earth has some special features that set it apart from its close cousins in the solar system including large oceans of liquid water and a rich atmosphere with just the right ingredients to support life as we know it Earth Can animals thrive without oxygen In 2010 a research team garnered attention when it published evidence of finding the first animals living in permanently anoxic conditions at the bottom of the sea But a new study led by scientists at the Woods Hole Oceanographic Some tiny plankton may have big effect on ocean s carbon storage How do you find your food Most animal species whether they rummage through a refrigerator or stalk prey in the wild obtain nutrients by consuming living organisms Plants for the most part adopt a different feeding Increase in volcanic eruptions at the end of the ice age caused by melting ice caps and erosion The combination of erosion and melting ice caps led to a massive increase in volcanic activity at the end of the last ice age according to new research As the climate warmed the ice caps melted decreasing the pressure Rapid formation of bubbles in magma may trigger sudden volcanic eruptions It has long been observed that some volcanoes erupt with little prior warning Now scientists have come up with an explanation behind these sudden eruptions that could change the way observers monitor active or dormant volcanoes New technique to find copper deposits A geologist at the University of Exeter has developed a new and relatively inexpensive way to establish whether certain types of magmatic rocks are more likely to contain valuable metal deposits Physicists create first photonic Maxwell s demon Phys org Maxwell s demon a hypothetical being that appears to violate the second law of thermodynamics has been widely studied since it was first proposed in 1867 by James Clerk Maxwell But most of these studies have Most precise measurement of reactor antineutrino spectrum reveals intriguing surprise Members of the International Daya Bay Collaboration who track the production and flavor shifting behavior of electron antineutrinos generated at a nuclear power complex in China have obtained the most precise measurement A new form of frozen water Scientists reveal new ice with record low density Amid the season known for transforming Nebraska into an outdoor ice rink a University of Nebraska Lincoln led research team has predicted a new molecular form of the slippery stuff that even Mother Nature has never borne Scientists create ultrathin semiconductor

    Original URL path: http://phys.org/earth-news/earth-sciences/?utm_source=subcateg&utm_medium=link&utm_campaign=tmpl-main-l (2016-02-13)
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  • Most precise measurement of reactor antineutrino spectrum reveals intriguing surprise
    and may indicate the need to revisit the models underlying the calculations We expect that the spectrum measured by Daya Bay will improve with more data and better understanding of the detector response These improved measurements will be essential for next generation reactor neutrino experiments such as JUNO said Jun Cao of the Institute of High Energy Physics IHEP in China a co spokesperson of Daya Bay and the deputy spokesperson of JUNO an experiment being built 200 kilometers away from Daya Bay Daya Bay s measurement of antineutrino flux the total number of antineutrinos emitted across the entire energy range indicates that the reactors are producing 6 percent fewer antineutrinos overall when compared to some of the model based predictions This result is consistent with past measurements This observed deficit has been named the Reactor Antineutrino Anomaly This disagreement could arise from the imperfection of the models Or more intriguingly it could be the result of an oscillation involving a new kind of neutrino the so called sterile neutrino postulated by some theories but yet to be detected Whether the anomaly exists is still an open question Background on Daya Bay The Daya Bay nuclear power complex is located on the southern coast of China 55 kilometers northeast of Hong Kong It consists of three nuclear power plants each with two reactor cores All six cores are pressurized water reactors with similar design and each can generate up to 2 9 gigawatt thermal power Every second the six reactors emit 3 500 billion billon electron antineutrinos For this measurement the Daya Bay experiment used six detectors located at 360 meters to 1 9 kilometers from the reactors Each detector contains 20 tons of gadolinium doped liquid scintillator to catch the reactor antineutrinos Explore further The Daya Bay Reactor Neutrino Experiment On track to completion More information F P An et al Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay Physical Review Letters 2016 DOI 10 1103 PhysRevLett 116 061801 Journal reference Physical Review Letters Provided by Brookhaven National Laboratory 312 shares feedback to editors Tweet Favorites Email Print PDF Featured Last comments Popular Detection of gravitational waves would open new window on universe Feb 10 2016 58 Gravitational waves detected 100 years after Einstein s prediction Feb 11 2016 144 Scientists discover hidden galaxies behind the Milky Way Feb 09 2016 3 GPS tracking down to the centimeter Feb 11 2016 10 A metal that behaves like water Feb 11 2016 2 more Phys org on facebook Relevant PhysicsForums posts Zeno s arrow paradox 14 minutes ago Arrows vs plate armor 25 minutes ago Wave impedance of free space 26 minutes ago Work done on a stationary bycicle 29 minutes ago Brainstorming Large scale piezoelectricity generation 2 hours ago free fall acceleration help 2 hours ago More from General Physics Related Stories The Daya Bay Reactor Neutrino Experiment On track to completion February 16 2011 Berkeley Lab physicists and engineers are among the leaders of the

    Original URL path: http://phys.org/news/2016-02-precise-reactor-antineutrino-spectrum-reveals.html (2016-02-13)
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