Phys.org news tagged with:mathematician
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en-usPhys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.Using math to make GuinnessIf you ever read public health research, you've probably encountered the term "Student's t-test," or just "t-test." The experimenters will do this magical test, and suddenly conclude that everything is awesome. But even when you're familiar with the t-test and what it does, very little thought goes into where this came from, or who came up with it. Well, today I'm going to tell you the origins of this staple of public health research.
http://phys.org/news/2015-07-math-guinness.html
Mathematics Wed, 29 Jul 2015 08:40:02 EDTnews357376585Mathematicians formulate equations, bend light and figure out how to hide thingsThe idea of cloaking and rendering something invisible hit the small screen in 1966 when a Romulan Bird of Prey made an unseen, surprise attack on the Starship Enterprise on Star Trek. Not only did it make for a good storyline, it likely inspired budding scientists, offering a window of technology's potential.
http://phys.org/news/2015-06-mathematicians-equations-figure.html
Mathematics Mon, 22 Jun 2015 06:48:39 EDTnews354174504Conservation theory gets mathematical treatmentTheories used for the last four decades as a tool to guide the conservation of flora and fauna may have misinterpreted the biological reality, according to new research by mathematicians at the University of York.
http://phys.org/news/2015-05-theory-mathematical-treatment.html
Ecology Thu, 28 May 2015 07:24:25 EDTnews352016656Ants' movements hide mathematical patternsWhen ants go exploring in search of food they end up choosing collective routes that fit statistical distributions of probability. This has been demonstrated by a team of mathematicians after analysing the trails of a species of Argentine ant. Studies like this could be applied to coordinate the movement of micro-robots in cleaning contaminated areas for example.
http://phys.org/news/2015-05-ants-movements-mathematical-patterns.html
Mathematics Tue, 12 May 2015 10:32:27 EDTnews350645539Earthquakes expose limits of scientific predictionsIn 2012, six Italian seismologists were sent to prison because they failed to predict the 2009 L'Aquila 6.3 magnitude earthquake.
http://phys.org/news/2015-05-earthquakes-expose-limits-scientific.html
Earth Sciences Fri, 08 May 2015 08:07:46 EDTnews350291258Researchers use math and observation to show neural networks in crustaceans have evolved to offer optimized swimming(Phys.org) —A team of researchers made up of one biologist and four mathematicians has found an example of natural selection providing an organism with optimal behavior. In their paper published in Proceedings of the National Academy of Sciences, the researchers describe how they studied the way long tailed crustaceans use their swimmerets and then developed a mathematical model to describe the most efficient way such swimmerets could be used to propel a creature—when compared, the real world method used by the crustaceans matched the optimized method found by the math models.
http://phys.org/news/2014-09-math-neural-networks-crustaceans-evolved.html
Evolution Tue, 09 Sep 2014 10:05:38 EDTnews329475928Understanding mudslides and other debris flows through mathematics(Phys.org) —Mudslides. Landslides. Volcanic debris flows. Avalanches. Falling rocks. They can come along so suddenly that people, homes, roads and even towns are buried or destroyed without much warning. Recently, we've had dramatic reminders of this, such as the mudslide in Oso, Wash., where 41 people died; an avalanche on Mt. Everest that killed 13 experienced Sherpas and another landslide event in Jackson, Wyo. And as much as ancient Pompeii serves as the most dramatic, historic reminder of the incredible element of surprise these events can wield, what seems extraordinarily incalculable is becoming...well, calculable.
http://phys.org/news/2014-04-mudslides-debris-mathematics.html
Earth Sciences Wed, 30 Apr 2014 08:00:03 EDTnews318057797Computer generated math proof is too large for humans to check(Phys.org) —A pair of mathematicians, Alexei Lisitsa and Boris Konev of the University of Liverpool, U.K., have come up with an interesting problem—if a computer produces a proof of a math problem that is too big to study, can it be judged as true anyway? In a paper they've uploaded to the preprint server arXiv, the two describe how they set a computer program to proving a small part of what's known as "Erdős discrepancy problem"—the proof produced a data file that was 13-gigabytes in size—far too large for any human to check, leading to questions as to whether the proof can be taken as a real proof.
http://phys.org/news/2014-02-math-proof-large-humans.html
Mathematics Wed, 19 Feb 2014 11:00:02 EDTnews312027154Mathematicians calculate that there are 177,147 ways to knot a tie(Phys.org) —A small team of mathematicians, led by Mikael Vejdemo-Johansson of the of the KTH Royal Institute of Technology in Stockholm, has uploaded a paper to the preprint server arXiv describing a mathematical process they used to determine that the number of ways to tie a tie is 177,147—far more than previous research has suggested.
http://phys.org/news/2014-02-mathematicians-ways.html
Mathematics Mon, 10 Feb 2014 11:40:01 EDTnews311253254A vexing math problem finds an elegant solution(Phys.org) —A famous math problem that has vexed mathematicians for decades has met an elegant solution by Cornell researchers. Graduate student Yash Lodha, working with Justin Moore, professor of mathematics, has described a geometric solution for the von Neumann-Day problem, first described by mathematician John von Neumann in 1929.
http://phys.org/news/2013-11-math-problem-elegant-solution.html
Mathematics Thu, 14 Nov 2013 07:47:16 EDTnews303637618New program simulates protein movementsProteins are molecules involved in most of the biological processes that take place in our bodies. They have to move in order to fulfil many of their functions. For example, they open or close to keep and transport the molecules inside them. Until now, costly methods were the only available option for studying these movements: supercomputers were needed and the calculations took many days. The department of mechanics of the Faculty of Engineering in Bilbao has now developed a shorter method. On the basis of the similarity in the way robots and proteins move, the theorems and algorithms used for studying and simulating the mechanisms have been adapted. That way, it is possible to find out more quickly and with the necessary precision how protein movement functions and facilitate the means for influencing the processes in which these molecules participate. The CIC bioGUNE centre is collaborating in this project, thus proving that bioscientific research and mechanical engineering are not that far removed from each other.
http://phys.org/news/2013-09-simulates-protein-movements.html
Other Wed, 11 Sep 2013 11:26:49 EDTnews298117595Generosity leads to evolutionary success, biologists showWith new insights into the classical game theory match-up known as the "Prisoner's Dilemma," University of Pennsylvania biologists offer a mathematically based explanation for why cooperation and generosity have evolved in nature.
http://phys.org/news/2013-09-generosity-evolutionary-success-biologists.html
Evolution Mon, 02 Sep 2013 15:00:16 EDTnews297339408Mathematician designs event cloaking device without using metamaterials(Phys.org) —Miguel A. Lerma a mathematician at Northwestern University has uploaded a paper to the preprint server arXiv, in which he describes the design of an event cloaking device that doesn't require the use of metamaterials. In his design, events are cloaked using mirrors.
http://phys.org/news/2013-08-mathematician-event-cloaking-device-metamaterials.html
Optics & Photonics Thu, 15 Aug 2013 06:30:01 EDTnews295764204The arithmetic of gun controlAiming to quell heated national debate about gun control with factual answers, two UC Irvine mathematicians have designed parameters to measure how to best prevent both one-on-one killings and mass shootings in the United States. Their paper appears Friday in the journal PLoS ONE.
http://phys.org/news/2013-07-arithmetic-gun.html
Mathematics Sat, 27 Jul 2013 02:09:49 EDTnews294109704Questions for Heather Leslie: How can the market sustain fisheries?Heather Leslie, assistant professor of environmental studies, says it's a mistake to assume market forces and sustainability must always be at loggerheads. In a recently published paper, Leslie and a group of researchers showed that small-scale fisheries near La Paz, Mexico, could earn a premium for fish that fit nicely on a plate, leaving larger fish to sustain the population. She spoke about her work with Kevin Stacey.
http://phys.org/news/2013-07-heather-leslie-sustain-fisheries.html
Ecology Tue, 16 Jul 2013 07:00:01 EDTnews293175636Internet traffic rise needs infrastructure upgradeAustralian internet traffic will increase by more than five times to hit one exabyte (one billion gigabytes) of data a month by 2016, a University of Adelaide mathematician and internet researcher has predicted.
http://phys.org/news/2013-06-internet-traffic-infrastructure.html
Telecom Fri, 21 Jun 2013 07:10:01 EDTnews291016720You clap, so I clap: Peer pressure drives applauseIf you have just seen a play that you privately think is drivel, will you keep silent when everyone around you demands an encore?
http://phys.org/news/2013-06-peer-pressure-applause.html
Social Sciences Wed, 19 Jun 2013 02:57:20 EDTnews290829409Texas banker puts up $1M for tricky math solutionA Texas banker is upping the ante to $1 million for whoever solves a tricky problem that's been dogging mathematicians since the 1980s.
http://phys.org/news/2013-06-texas-banker-1m-tricky-math.html
Mathematics Tue, 04 Jun 2013 17:40:01 EDTnews289585541Researcher finds solution to problem in 19th-century theory of meromorphic functionsGeneral theory of meromorphic functions in the complex plane began in the nineteenth century, when E. Picard proved his famous 'Picard's little theorem'. Then, in the 1920s, R. Nevanlinna created the modern theory of meromorphic functions, where his 'second main theorem (SMT)' provides a far-reaching generalization of Picard's theorem. Nowadays, the theory is well-established as a result of many excellent research studies. Nevertheless, the theory still has several unresolved problems, including the following one:
http://phys.org/news/2013-05-solution-problem-19th-century-theory-meromorphic.html
Mathematics Tue, 28 May 2013 06:00:02 EDTnews288938886Mathematician proves there are infinitely many pairs of prime numbers less than 70 million units apart(Phys.org) —Mathematician Yitang Zhang of the University of New Hampshire, appears to have taken a major step in solving the twin prime conjecture. He's come up with a mathematical proof that shows that the number of pairs of prime numbers that exist that are less than 70 million units apart is infinite. His proof is currently under review for publication in the journal Annals of Mathematics.
http://phys.org/news/2013-05-mathematician-infinitely-pairs-prime-million.html
Mathematics Wed, 15 May 2013 09:14:19 EDTnews287828042How to manage motorway tolls through the Game TheoryA team led by José Manuel Zarzuelo, Professor of Applied Economics, has applied the co-operative Game Theory to calculating motorway toll charges. The results of the study have been published in the specialised journal European Journal of Operational Research. In this study, the authors propose that sophisticated mathematical methods could be used in traffic management.
http://phys.org/news/2013-04-motorway-tolls-game-theory.html
Other Tue, 30 Apr 2013 13:48:09 EDTnews286548482Kenneth Appel dies, used computer on map questionKenneth Appel, a mathematician who was the first to use a computer to prove a century-old major mathematical theorem, has died at age 80 in Dover, N.H.
http://phys.org/news/2013-04-kenneth-appel-dies.html
Mathematics Mon, 29 Apr 2013 15:30:01 EDTnews286465938The problem with predictions: Speaker says peering into future remains an imperfect sciencePeople have always yearned to see into the future, to peek around the corner and make sense of what's going on, according to author and mathematician David Orrell. But predicting the future is difficult. And what's more, the search for the "perfect model" of prediction often reveals as much about people's sense of aesthetics as it does about the future, Orrell said last Thursday during "Perfect Model: The Past, Present, and Future of Prediction," a talk sponsored by the Peabody Museum of Archaeology and Ethnology.
http://phys.org/news/2013-04-problem-speaker-peering-future-imperfect.html
Mathematics Fri, 26 Apr 2013 07:21:33 EDTnews286179686The RSA algorithm (or how to send private love letters)A couple of days ago on The Conversation, I set myself up with a task: to defend the usefulness of so-called "useless" maths. Today, that defence continues, with a look at the RSA algorithm.
http://phys.org/news/2013-04-rsa-algorithm-private-loveletters.html
Mathematics Wed, 10 Apr 2013 09:51:02 EDTnews284806255Your number's up: A case for the usefulness of useless mathsI once made the mistake of asking a mathematician why he devoted his whole life to maths. "Because it's fun!" he replied wildly, his flabby cheeks beaming with childlike excitement.
http://phys.org/news/2013-04-case-useless-maths.html
Mathematics Wed, 10 Apr 2013 09:48:57 EDTnews284806118Researchers seeking to redefine difference between solids and liquids(Phys.org) —Charles Radin a mathematical physicist with the University of Texas and one of his former student's David Aristoff, have built a 2D model material made of disks to represent atoms. In their article published in Notices of the American Mathematical Society, they suggest that their model shows that defining the difference between a solid and a liquid should be more a matter of measuring the way a material responds to shear, than looking at the way its atoms are arranged.
http://phys.org/news/2013-04-redefine-difference-solids-liquids.html
Mathematics Mon, 08 Apr 2013 08:46:40 EDTnews284629586Organic electronics—a hot matterOrganic semi-conductors could revolutionise electronics in various areas. Nowadays, components put out such high performances that they are used in small devices like mobile phones. With larger devices, however, the organic components heat up in such an uncontrollable manner that they break down or conduct electricity in an irregular way. Physicists of the TU Dresden (Dresden University of Technology) and mathematicians of the WIAS have collaborated to analyse the typical feedback effects and they describe them for organic semi-conductors in the Physical Review Letters.
http://phys.org/news/2013-04-electronicsa-hot.html
Condensed Matter Mon, 08 Apr 2013 07:40:01 EDTnews284624975Shrinking blob speeds traveling salesman on his way(Phys.org) —What is the shortest route that a traveling salesman must take to visit a number of specified cities in a tour, stopping at each city once and only once before returning to the starting point? The most accurate way to answer this question is to measure every possible route, then determine which one is shortest. However, this method becomes unfeasible when there are too many cities on the salesman's tour. Jeff Jones and Andrew Adamatzky of the University of the West of England have discovered that they can use a virtual shrinking blob to find a reasonable solution.
http://phys.org/news/2013-03-blob-salesman.html
Computer Sciences Tue, 26 Mar 2013 13:30:01 EDTnews283522474Researchers develop quantum computer algorithm for counting prime numbers(Phys.org) —Two math and physics researchers from the University's of Barcelona and Madrid respectively have developed an algorithm to count prime numbers using a quantum computer. José Latorre and Germán Sierra describe in their paper they've uploaded to the preprint server arXiv, their formula that uses spin states of quantum bits (qubits) to calculate the number of prime numbers below a given value.
http://phys.org/news/2013-03-quantum-algorithm-prime.html
Quantum Physics Tue, 26 Mar 2013 07:55:59 EDTnews283503342Physics duo discover 13 new solutions to Newtonian three-body orbit problem(Phys.org) —Physicists Milovan Šuvakov and V. Dmitrašinović of the Institute of Physics, Belgrade in Serbia have discovered using computer simulations, 13 new solutions to the three-body problem—predicting patterns that describe how three bodies will orbit around each other in space in a repeating pattern. The two describe how they came up with their solutions using computer simulations in their paper published in Physical Review Letters.
http://phys.org/news/2013-03-physics-duo-solutions-newtonian-three-body.html
General Physics Fri, 15 Mar 2013 07:39:02 EDTnews282551769