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en-usLatest news from Proceedings of the Royal Society AGrasshopper problem yields insight into quantum theory(Phys.org)—Like many mathematical puzzles, the grasshopper problem is simple to state but difficult to solve: A grasshopper lands at a random point on a lawn of area 1, then jumps once, a fixed distance, in a random direction. What shape should the lawn be in order to maximize the chance that the grasshopper stays on the lawn after jumping?
https://phys.org/news/2017-12-grasshopper-problem-yields-insight-quantum.html
Quantum Physics Mon, 04 Dec 2017 09:30:01 ESTnews431580055How to cut your lawn for grasshoppersPicture a grasshopper landing randomly on a lawn of fixed area. If it then jumps a certain distance in a random direction, what shape should the lawn be to maximise the chance that the grasshopper stays on the lawn after jumping?
https://phys.org/news/2017-11-lawn-grasshoppers.html
Mathematics Wed, 22 Nov 2017 02:07:02 ESTnews430538808Quantum tunnelling in water opens the way to improved biosensingResearchers at the University of Sydney have applied quantum techniques to understanding the electrolysis of water, which is the application of an electric current to H2O to produce the constituent elements hydrogen and oxygen.
https://phys.org/news/2017-11-quantum-tunnelling-biosensing.html
Condensed Matter Tue, 07 Nov 2017 19:00:01 ESTnews429290116New software speeds origami structure designsResearchers at Georgia Institute of Technology have developed a new computer-aided approach that streamlines the design process for origami-based structures, making it easier for engineers and scientists to conceptualize new ideas graphically while simultaneously generating the underlying mathematical data needed to build the structure in the real world.
https://techxplore.com/news/2017-10-software-origami.html
Engineering Wed, 11 Oct 2017 14:04:27 ESTnews426949403How close to invisible can a mirror be?(Phys.org)—In 2011, mathematicians Alexander Plakhov and Vera Roshchina proved that objects with mirror surfaces cannot be perfectly invisible. Now in a new study, Plakhov has returned to the problem, asking just how close to invisible a mirror-surfaced object can be.
https://phys.org/news/2017-10-invisible-mirror.html
Mathematics Fri, 06 Oct 2017 09:30:03 ESTnews426479218A beautiful wing design solution inspired by owl feathersMany species of owl are able to hunt without being heard by their prey by suppressing the noise of their wings at sound frequencies above 1.6 kilohertz (kHz)—including the range at which human hearing is most sensitive.
https://phys.org/news/2017-09-beautiful-wing-solution-owl-feathers.html
Mathematics Wed, 27 Sep 2017 02:24:12 ESTnews425697842Mathematicians ask: What's in a ripple?When a fluid or a gas experiences a sudden disturbance, such as a change in pressure or elevation, it often gives rise to a phenomenon known as an undular bore, which consists of a series of rapid oscillations that propagate and spread.
https://phys.org/news/2017-09-mathematicians-ripple.html
Mathematics Wed, 20 Sep 2017 09:54:59 ESTnews425120076The mathematics of golf(Phys.org)—The official Rules of Golf, which are continually being revised and updated as new equipment emerges, have close ties to mathematics. In many cases, math is used to place limitations on golf equipment, such as restricting the distance the ball will travel, as predicted by mathematical models. The Rules also place limits on a value called the coefficient of restitution, which measures the efficiency of the impact between a club and ball.
https://phys.org/news/2017-08-mathematics-golf.html
Mathematics Wed, 16 Aug 2017 09:30:04 ESTnews422028623Experimental method measures robustness of quantum coherenceResearchers at the UAB have come up with a method to measure the strength of the superposition coherence in any given quantum state. The method, published in the journal Proceedings of the Royal Society A, is based on the measurement of experimental parameters related to the visibility of the interference fringe patterns produced when the two states are superimposed.
https://phys.org/news/2017-07-experimental-method-robustness-quantum-coherence.html
Quantum Physics Thu, 27 Jul 2017 10:03:27 ESTnews420368579Model suggests fear of crime is contagious(Phys.org)—A pair of researchers at University College London has found evidence suggesting that fear of crime is contagious. In their paper published in Proceedings of the Royal Society A, Rafael Prieto Curiel and Steven Bishop describe the model they built, how it works and what it showed.
https://phys.org/news/2017-07-crime-contagious.html
Social Sciences Wed, 12 Jul 2017 08:39:36 ESTnews419067525Physicists provide support for retrocausal quantum theory, in which the future influences the past(Phys.org)—Although there are many counterintuitive ideas in quantum theory, the idea that influences can travel backwards in time (from the future to the past) is generally not one of them. However, recently some physicists have been looking into this idea, called "retrocausality," because it can potentially resolve some long-standing puzzles in quantum physics. In particular, if retrocausality is allowed, then the famous Bell tests can be interpreted as evidence for retrocausality and not for action-at-a-distance—a result that Einstein and others skeptical of that "spooky" property may have appreciated.
https://phys.org/news/2017-07-physicists-retrocausal-quantum-theory-future.html
Quantum Physics Wed, 05 Jul 2017 10:00:02 ESTnews418444589Problem of wheeled suitcases wobbling explained(Phys.org)—A team of researchers at Universite Paris-Diderot has uncovered the reason for wobbling of wheeled suitcases. In their paper published in Proceedings of the Royal Society A, the group explains the physics behind suitcase wobbling and offer some suggestions to overcome the problem.
https://phys.org/news/2017-06-problem-wheeled-suitcases.html
General Physics Wed, 21 Jun 2017 08:20:03 ESTnews417244533Innovation dilemma suggests that 'better' models are not always better(Phys.org)—If you had to predict the probability of a catastrophic meteor striking the Earth, you would likely want the most accurate models on which to base your predictions. But a new paper shows that, because the most accurate models are generally more innovative and complex, they may suffer from a higher probability of error. Consequently, the most innovative and accurate models may not offer the best methods for making predictions, especially of rare, high-consequence events.
https://phys.org/news/2017-05-dilemma.html
Mathematics Mon, 08 May 2017 09:30:01 ESTnews413431868Shoe-string theory: Science shows why shoelaces come untiedA new study by mechanical engineers at UC Berkeley finally shows why your shoelaces may keep coming untied. It's a question that everyone asks, often after stopping to retie their shoes, yet one that nobody had investigated until now. The answer, the study suggests, is that a double whammy of stomping and whipping forces acts like an invisible hand, loosening the knot and then tugging on the free ends of your laces until the whole thing unravels.
https://phys.org/news/2017-04-shoe-string-theory-science-shoelaces-untied.html
General Physics Tue, 11 Apr 2017 19:00:01 ESTnews411142390Natural measures to prevent floods valuable but not 'a silver bullet'Natural measures to manage flooding from rivers can play a valuable role in flood prevention, but a lack of monitoring means their true potential remains unclear, researchers say.
https://phys.org/news/2017-03-natural-valuable-silver-bullet.html
Environment Wed, 15 Mar 2017 05:26:55 ESTnews408774404Wind turbines with flexible blades found to be more efficient(Tech Xplore)—A small team of researchers with Sorbonne Université and École Nationale Supérieure des Arts et Métiers-ParisTech has found that using flexible blades on a wind turbine can dramatically increase its efficiency. In their paper published in the journal Proceedings of the Royal Society A, the team describes their approach and the results they obtained through physical testing of their idea.
https://techxplore.com/news/2017-02-turbines-flexible-blades-efficient.html
Energy & Green Tech Wed, 22 Feb 2017 08:50:04 ESTnews406969060'Field patterns' as a new mathematical objectUniversity of Utah mathematicians propose a theoretical framework to understand how waves and other disturbances move through materials in conditions that vary in both space and time. The theory, called "field patterns," published today in Proceedings of the Royal Society A.
https://phys.org/news/2017-02-field-patterns-mathematical.html
Mathematics Tue, 14 Feb 2017 19:00:02 ESTnews406312110Mathematical model reveals parental involvement can 'immunize' students from dropping outNewsflash for American high school students—choose friends wisely, or they may end up costing you your education.
https://phys.org/news/2017-01-mathematical-reveals-parental-involvement-immunize.html
Mathematics Tue, 31 Jan 2017 16:13:08 ESTnews405101553Magnetic reconnection research sheds light on explosive phenomena in astrophysics and fusion experimentsScientists are closer than ever to unraveling a process called magnetic reconnection that triggers explosive phenomena throughout the universe. Solar flares, northern lights and geomagnetic storms that can disrupt cell phone service and black out power grids are all set off by magnetic field lines that converge, break apart and violently reconnect in ways that are not fully understood.
https://phys.org/news/2016-12-magnetic-reconnection-explosive-phenomena-astrophysics.html
Plasma Physics Thu, 08 Dec 2016 17:12:04 ESTnews400439514Earth's days getting longer: study (Update) Earth's days are getting longer but you're not likely to notice any time soon—it would take about 3.3 million years to gain just one minute, according to a study published on Wednesday.
https://phys.org/news/2016-12-earth-days-longer.html
Space Exploration Wed, 07 Dec 2016 02:40:26 ESTnews400300814New math tools for new materialsUniversity of Utah mathematician Graeme Milton presents a new tool for understanding how energy waves move through complex materials, opening up possibilities to design materials that absorb or bend energy as desired. His solution for so-called "analytic materials" was published November 15 in Proceedings of the Royal Society A.
https://phys.org/news/2016-11-math-tools-materials.html
Mathematics Mon, 21 Nov 2016 12:06:26 ESTnews398952378Storm wave study could help improve design of coastal defencesCoastal defences could be designed to better withstand powerful storms triggered by climate change, a study of wave dynamics suggests.
https://phys.org/news/2016-10-storm-coastal-defences.html
General Physics Fri, 14 Oct 2016 10:12:59 ESTnews395658772Researchers control 'shear-band' defects in manufacturing processesAn international team of researchers has invented a method to control the formation of defects called "shear bands" in metals manufacturing processes and discovered microscopic details of how the defects are created.
https://phys.org/news/2016-09-shear-band-defects.html
Condensed Matter Wed, 21 Sep 2016 11:23:58 ESTnews393675821A non-probabilistic quantum theory produces unpredictable results(Phys.org)—Quantum measurements are often inherently unpredictable, yet the usual way in which quantum theory accounts for unpredictability has long been viewed as somewhat unsatisfactory. In a new study, University of Oxford physicist Chiara Marletto has developed an alternative way to account for the unpredictability observed in quantum measurements by using the recently proposed theory of superinformation—a theory that is inherently non-probabilistic. The new perspective may lead to new possibilities in the search for a successor to quantum theory.
https://phys.org/news/2016-09-non-probabilistic-quantum-theory-unpredictable-results.html
Quantum Physics Wed, 21 Sep 2016 10:30:01 ESTnews393650352Tree-rings reveal secret clocks that could reset key dates across the ancient worldOxford University researchers say that trees which grew during intense radiation bursts in the past have 'time-markers' in their tree-rings that could help archaeologists date events from thousands of years ago.
https://phys.org/news/2016-08-tree-rings-reveal-secret-clocks-reset.html
Earth Sciences Tue, 16 Aug 2016 19:00:02 ESTnews390580415Experimentation suggests Vikings could have used sunstone to navigate(Phys.org)—A team of researchers from several institutions in Hungary has conducted experiments meant to test the possibility that the Vikings actually did use sunstones to navigate. In their paper published in Proceedings of the Royal Society A, the team describes the experiments they carried out, their results and why they now believe it is possible to use a sunstone as a navigational aid during times when the skies are covered with clouds.
https://phys.org/news/2016-07-experimentation-vikings-sunstone.html
Archaeology & Fossils Wed, 27 Jul 2016 08:40:02 ESTnews388825389Genes find their partners without matchmakersA new study provides more evidence that identical sections of DNA can match up with each other without the help of other molecules.
https://phys.org/news/2016-07-genes-partners-matchmakers.html
Biotechnology Wed, 20 Jul 2016 05:24:58 ESTnews388211087Indestructible bridges could be realityA new generation of indestructible bridges could be possible, thanks to research from the University of Warwick.
https://phys.org/news/2016-07-indestructible-bridges-reality.html
Mathematics Wed, 13 Jul 2016 12:57:12 ESTnews387633395Understanding a natural cloaking mechanismResearchers at Yale and in Europe are exploring a natural "cloaking" mechanism that allows certain elastic materials—think Jell-O, for instance—to imbibe substantial amounts of liquid droplets without changing their own mechanical properties. Writing in the May 18 online edition of the Proceedings of the Royal Society A, John Wettlaufer and his colleagues expanded on previous work about surface tension to find the limits of such natural cloaking.
https://phys.org/news/2016-05-natural-cloaking-mechanism.html
General Physics Thu, 19 May 2016 06:59:03 ESTnews382859935Mathematicians propose model for the dynamics of the chameleon tongue(Phys.org)—A small team of mathematicians with Oxford University and an engineer with Tufts University has together proposed a model to explain the dynamics of the chameleon tongue. In their paper published in Proceedings of the Royal Society A, the team describes their study of chameleon tongues, their findings and a description of the math used to model the sequence of events that lead up to a very fast tongue strike.
https://phys.org/news/2016-04-mathematicians-dynamics-chameleon-tongue.html
Mathematics Wed, 20 Apr 2016 08:40:01 ESTnews380355353