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en-usPhys.org provides the latest news on mathematics, math, math science, mathematical science and math technology. Mathematician's study of 'swarmalators' could direct future scienceHow does the Japanese tree frog figure into the latest work of noted mathematician Steven Strogatz? As it turns out, quite prominently.
https://phys.org/news/2017-11-mathematician-swarmalators-future-science.html
Mathematics Fri, 17 Nov 2017 18:05:52 ESTnews430164338New paper answers causation conundrumIn a new paper published in a special issue of the Philosophical Transactions of the Royal Society A, SFI Professor Jessica Flack offers a practical answer to one of the most significant, and most confused questions in evolutionary biology—can higher levels of organization drive the behavior of lower-level components?
https://phys.org/news/2017-11-paper-causation-conundrum.html
Mathematics Fri, 17 Nov 2017 09:30:04 ESTnews430132461Millions, billions, trillions—how to make sense of numbers in the newsNational discussions of crucial importance to ordinary citizens – such as funding for scientific and medical research, bailouts of financial institutions and the current Republican tax proposals – inevitably involve dollar figures in the millions, billions and trillions.
https://phys.org/news/2017-11-millions-billions-trillionshow-news.html
Mathematics Fri, 17 Nov 2017 07:50:02 ESTnews430127070Researchers use 3-D printers to turn century-old theory into complex schwarzitesRice University engineers are using 3-D printers to turn structures that have until now existed primarily in theory into strong, light and durable materials with complex, repeating patterns.
https://phys.org/news/2017-11-d-printers-century-old-theory-complex.html
Mathematics Thu, 16 Nov 2017 12:47:06 ESTnews430058808Brain research is underserved by statistics, says Carnegie Mellon's Rob KassBrain-related disorders impact almost everyone, either directly or through family or friends. For many of the disorders, whether they're psychiatric or neurological, there are basic scientific descriptions and valuable treatment options, but none has a satisfactory cure because the underlying mechanisms are not fully understood.
https://phys.org/news/2017-11-brain-underserved-statistics-carnegie-mellon.html
Mathematics Thu, 09 Nov 2017 13:39:42 ESTnews429457175Researchers offer new information warfare modelResearchers have collaborated to develop a mathematical model of information warfare in a society under periodic destabilization. The authors of the paper, which was published in Mathematical Models and Computer Simulations, have determined for the first time how periodic surges of propaganda in the mass media can disturb the balance between two opposing parties. In addition to providing an analytical solution to the problem, the researchers have conducted a numerical experiment that illustrates their model.
https://phys.org/news/2017-11-warfare.html
Mathematics Thu, 09 Nov 2017 09:42:17 ESTnews429442925Has protecting marine species become a job for statisticians?Fishermen have no way of separating the fish they catch when they cast their nets at sea. Protected species and fish with no market value—the hammerhead shark, for example—end up being trapped and dying for no reason. In an attempt to minimize this incidental fishing, statisticians from the University of Geneva (UNIGE, Switzerland), Dalhousie University (Halifax, Canada) and the Australian National University (Canberra) have devised a new statistical method for predicting bycatches more accurately in the future. The technique, which is explained in full in the journal Annals of Applied Statistics, can also be applied to other research fields, including health economics, medicine and educational science.
https://phys.org/news/2017-11-marine-species-job-statisticians.html
Mathematics Wed, 08 Nov 2017 12:40:32 ESTnews429367222Paradoxical persistence of all negative growths from reformulation of Markowitz theoremAn improvement on the famous Markowitz theorem may have the potential to not only more accurately predict the next financial crises, but also the outbreak of pests and diseases, or whether a patient will have a heart attack in two hours or not.
https://phys.org/news/2017-11-paradoxical-persistence-negative-growths-reformulation.html
Mathematics Tue, 07 Nov 2017 12:12:44 ESTnews429279153Simple statistics can be good enoughStudy of the mismatch between spatial environmental data and a commonly used statistical analysis suggests simpler statistics are sufficient in many cases.
https://phys.org/news/2017-11-simple-statistics-good.html
Mathematics Tue, 07 Nov 2017 09:10:03 ESTnews429267686Innovative statistical methods shed light on extent of modern slavery in US, worldPolicymakers, law enforcement and advocates can now better identify and target modern slavery thanks to the work of human rights experts and researchers whose application of unique statistical methods yields more precise figures on its existence and extent. The groundbreaking work appears in the October issue of Chance, which features a series of articles written by authority figures on the subject of modern slavery.
https://phys.org/news/2017-11-statistical-methods-extent-modern-slavery.html
Mathematics Thu, 02 Nov 2017 11:24:43 ESTnews428840678New tool predicts risk of plant disease and infestation worldwideA newly developed technique can predict the risk of plant disease or infestation across the globe. Described in open-access journal Frontiers in Applied Mathematics and Statistics, the technique considers pest-host interactions and the geographical distribution of vulnerable plants to provide maps of potential disease hotspots. This could help governments to understand the risk of outbreaks before they happen.
https://phys.org/news/2017-10-tool-disease-infestation-worldwide.html
Mathematics Mon, 30 Oct 2017 10:13:46 ESTnews428577217Six degrees of separation: Why it is a small world after allIt's a small world after all - and now science has explained why. A study conducted by the University of Leicester and KU Leuven, Belgium, examined how small worlds emerge spontaneously in all kinds of networks, including neuronal and social networks, giving rise to the well-known phenomenon of "six degrees of separation".
https://phys.org/news/2017-10-degrees-small-world.html
Mathematics Thu, 19 Oct 2017 10:23:13 ESTnews427627381Mathematically modeling HIV drug pharmacodynamics37 million people around the world today live with Human Immunodeficiency Virus (HIV), which is responsible for roughly 1.1 million deaths caused by AIDS-related conditions.
https://phys.org/news/2017-10-mathematically-hiv-drug-pharmacodynamics.html
Mathematics Thu, 19 Oct 2017 10:00:05 ESTnews427606857Scientists see order in complex patterns of river deltasRiver deltas, with their intricate networks of waterways, coastal barrier islands, wetlands and estuaries, often appear to have been formed by random processes, but scientists at the University of California, Irvine and other institutions see order in the apparent chaos.
https://phys.org/news/2017-10-scientists-complex-patterns-river-deltas.html
Mathematics Thu, 19 Oct 2017 02:32:20 ESTnews427599131How 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 ESTnews426479218Statisticians develop efficient method for comparing multi-group, high-dimensional dataMANOVA (multivariate analysis of variance) is a commonly used statistical method in data analysis to determine if there is any difference in the means of different groups of data. However, the classical approach is not suitable for analysing high-dimensional data. High-dimensional data often make the traditional MANOVA methods invalid since in a traditional MANOVA, the dimension is assumed to be fixed and has to be much smaller than the number of observations. In a high-dimensional MANOVA setting, this is no longer true. Prof ZHANG Jin-Ting from the Department of Statistics and Applied Probability, NUS and his Ph.D. students have developed a new high-dimensional MANOVA method which can be used to compare the means of several data groups involving high-dimensional data efficiently.
https://phys.org/news/2017-10-statisticians-efficient-method-multi-group-high-dimensional.html
Mathematics Tue, 03 Oct 2017 06:27:11 ESTnews426230823JCU team's winning basketball formulaJames Cook University scientists have come up with a winning formula for basketball teams looking to take home Olympic gold.
https://phys.org/news/2017-09-jcu-team-basketball-formula.html
Mathematics Fri, 29 Sep 2017 09:42:43 ESTnews425896954There are only 15 possible pentagonal tiles, research provesTiling the plane with a single pattern is a mathematical problem that has interested humans since Antiquity, notably for the aesthetic quality of tiles in mosaics or tiling. One of the unresolved problems in this field that has been puzzling the scientific community since 1918 has now been definitively resolved thanks to Michaël Rao of the Laboratoire d'informatique du parallélisme (CNRS/Inria/ENS de Lyon/Université Claude Bernard Lyon 1). Using computing tools he was able to demonstrate that there are only 15 five-sided patterns that can tile the plane. The research is now available on the Arxiv website.
https://phys.org/news/2017-09-pentagonal-tiles.html
Mathematics Fri, 29 Sep 2017 08:53:00 ESTnews425893972On a collision course with game theoryHow do pedestrians behave in a large crowd? How do they avoid collisions? How can their paths be modeled? A new approach developed by mathematicians from Würzburg and Nice provides answers to these questions.
https://phys.org/news/2017-09-collision-game-theory.html
Mathematics Wed, 27 Sep 2017 10:40:59 ESTnews425727651A 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 ESTnews425697842New Monte Carlo method is computationally more effective for quantifying uncertaintyUncertainty quantification (UQ) is a statistical technique to predict many complex phenomena such as weather conditions and tsunami risks. It involves the combination of real-life data (e.g. weather measurements) together with mathematical equations to model physical systems that are well-understood. These complex models are usually associated with either high-dimensional objects, large datasets or possibly both. In such scenarios, it is important that the required computational methodology to estimate such models is resource-efficient. Prof Ajay JASRA from the Department of Statistics and Applied Probability, NUS and his collaborators have proposed a more efficient approach to perform UQ calculations.
https://phys.org/news/2017-09-monte-carlo-method-computationally-effective.html
Mathematics Tue, 26 Sep 2017 06:55:53 ESTnews425627747New mathematical model to explain the correlation between migration and living standardsScientists from the Peoples' Friendship University of Russia (RUDN), Centre National de la Recherche Scientific (France) and the University of Leicester (United Kingdom) have shown how the wealth of a country relates to its migration rates. A new mathematical model forms the basis for future research in this field. The study was published in Nonlinear Analysis. The results were presented at the VIII International Conference on Differential and Functional Differential Equations DFDE-2017 held on August 13-20 in the PFUR.
https://phys.org/news/2017-09-mathematical-migration-standards.html
Mathematics Tue, 26 Sep 2017 05:34:33 ESTnews425622862Just what is our problem with numbers?Most people are aware of arachnophobia, but have you heard of arithmophobia? Even if you haven't, you've likely come across it.
https://phys.org/news/2017-09-problem.html
Mathematics Mon, 25 Sep 2017 08:10:02 ESTnews425545190The math of doughnuts: 'Moonshine' sheds light on elliptic curvesMathematicians have opened a new chapter in the theory of moonshine, one which begins to harness the power of the pariahs - sporadic simple groups that previously had no known application.
https://phys.org/news/2017-09-math-doughnuts-moonshine-elliptic.html
Mathematics Fri, 22 Sep 2017 05:00:01 ESTnews425266650Five ways ancient India changed the world – with mathsIt should come as no surprise that the first recorded use of the number zero, recently discovered to be made as early as the 3rd or 4th century, happened in India. Mathematics on the Indian subcontinent has a rich history going back over 3,000 years and thrived for centuries before similar advances were made in Europe, with its influence meanwhile spreading to China and the Middle East.
https://phys.org/news/2017-09-ways-ancient-india-world-maths.html
Mathematics Thu, 21 Sep 2017 09:44:10 ESTnews425205840Nothing matters: how the invention of zero helped create modern mathematicsA small dot on an old piece of birch bark marks one of the biggest events in the history of mathematics. The bark is actually part of an ancient Indian mathematical document known as the Bakhshali manuscript. And the dot is the first known recorded use of the number zero. What's more, researchers from the University of Oxford recently discovered the document is 500 years older than was previously estimated, dating to the third or fourth century – a breakthrough discovery.
https://phys.org/news/2017-09-modern-mathematics.html
Mathematics Thu, 21 Sep 2017 08:00:03 ESTnews425198172Mathematicians 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 ESTnews425120076These four easy steps can make you a math whizMany people find mathematics daunting. If true, this piece is for you. If not, this piece is still for you.
https://phys.org/news/2017-09-easy-math-whiz.html
Mathematics Tue, 12 Sep 2017 08:40:01 ESTnews424421044Streamlined security: Optimizing sensor placement with mathematicsAn increasing global reliance on—and demand for—heightened security in public and private settings calls for optimal sensor technology. Public places, such as shopping malls, banks, transportation hubs, museums, and parking lots, frequently benefit from cameras and motion detectors, which identify suspicious and unwelcome activity. However, placing security sensors to optimize resource management and system performance while simultaneously protecting people and products is a tricky challenge.
https://phys.org/news/2017-09-optimizing-sensor-placement-mathematics.html
Mathematics Thu, 07 Sep 2017 10:38:55 ESTnews423999529Researchers find optimal rules for seedings in knock-out tournamentsResearchers from the Higher School of Economics and the Stanford Graduate School of Business have conducted a study on tournaments using the playoff system, which is one of the most popular forms of sporting competitions. In the playoff system, two teams play one another in each match, and the winner advances to the next stage of the tournament, while the loser is eliminated. Mathematical calculations allowed the researchers to identify two optimum systems for solving the discrete optimization problem of finding a seeding that maximizes spectator interest in a tournament when spectators are interested in matches with a high level of competitiveness. The results of the study were published in the Journal of Combinatorial Optimization.
https://phys.org/news/2017-08-optimal-seedings-knock-out-tournaments.html
Mathematics Thu, 31 Aug 2017 05:53:11 ESTnews423377576