Phys.org: Phys.org news tagged with: equation
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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.Heat distributions help researchers to understand curved spaceThe heat equation is one of the most important partial differential equations. The behavior of the solution to the equation reflects the geometry of the underlying space very well. Therefore, this equation has been investigated very extensively in both analysis and geometry. The solution evolves over time so that the Dirichlet's energy functional decreases most efficiently. Recently, F. Otto introduced another characterization: the solution evolves so that the Boltzmann entropy increases most efficiently from the viewpoint of optimal transportation. Both of these characterizations enable us to study the heat equation on spaces admitting singularities, where usual differential calculus does not work. However, their identification in such spaces is unknown.
http://phys.org/news328255083.html
Other SciencesTue, 26 Aug 2014 07:50:06 EDTnews328255083Maths can make the internet 5-10 times fasterMathematical equations can make Internet communication via computer, mobile phone or satellite many times faster and more secure than today. Results with software developed by researchers from Aalborg University in collaboration with the US universities the Massachusetts Institute of Technology (MIT) and California Institute of Technology (Caltech) are attracting attention in the international technology media.
http://phys.org/news324798671.html
TechnologyThu, 17 Jul 2014 07:50:01 EDTnews324798671Zippy supercomputer helps UAH solar scientists answer questionsTalk about a mathematics hot rod – how does 13 quadrillion calculations per second grab you?
http://phys.org/news321006908.html
Astronomy & SpaceTue, 03 Jun 2014 09:35:39 EDTnews321006908Mathematical equation could reduce traffic jams(Phys.org) —New research has found traffic jams and accidents could be reduced by controlling the reaction times of robotic cars.
http://phys.org/news302937422.html
Other SciencesWed, 06 Nov 2013 05:17:32 EDTnews302937422Are you ready to retire? Mathematical models estimate the value of pension plansThere comes a time in each of our lives when we consider starting a pension plan –either on the advice of a friend, a relative, or of our own volition. The plan of choice may depend on various factors, such as the age and salary of the individual, number of years of expected employment, as well as options to retire early or late.
http://phys.org/news301593725.html
Other SciencesMon, 21 Oct 2013 17:02:49 EDTnews301593725Simulation sets atoms shivering(Phys.org) —In "Harry Potter and the Sorcerer's Stone" (JK Rowling, 1997), Harry, Ron, and Hermione encounter a massive stone chessboard, one of many obstacles in their path. To advance, they must play, and win. Although the board and pieces are much larger than normal, and the circumstances a bit peculiar, one thing remains clear to them—this is a game of chess, with the same rules as always.
http://phys.org/news299147789.html
PhysicsMon, 23 Sep 2013 10:00:02 EDTnews299147789The Drake Equation revisited: An interview with Sara SeagerPlanet hunters keep finding distant worlds that bear a resemblance to Earth. Some of the thousands of exoplanet candidates discovered to date have similar sizes or temperatures. Others possess rocky surfaces and support atmospheres. But no world has yet provided an unambiguous sign of the characteristic that still sets our pale blue dot apart: the presence of life.
http://phys.org/news297408604.html
Astronomy & SpaceTue, 03 Sep 2013 06:31:41 EDTnews297408604When calculating cell-growth thermodynamics, reconsider using the Gibbs free energy equationA forthcoming article in The Quarterly Review of Biology provides the basis for an argument against using the Gibbs free energy equation to accurately determine the thermodynamics of microbial growth.
http://phys.org/news290057667.html
BiologyMon, 10 Jun 2013 04:35:07 EDTnews290057667Researchers develop formula that can calculate person's speed by just looking at their footprintsTwo Spanish scientists have designed an equation that provides a highly accurate estimate of an individual's speed based on stride length. They used data from professional athletes and walking and running experiments on a beach in order to come up with the equation. The result has applications in the study of fossil trackways of human footprints.
http://phys.org/news285844594.html
Other SciencesMon, 22 Apr 2013 10:16:56 EDTnews285844594On the origins of the Schrodinger equation(Phys.org) —One of the cornerstones of quantum physics is the Schrödinger equation, which describes what a system of quantum objects such as atoms and subatomic particles will do in the future based on its current state. The classical analogies are Newton's second law and Hamiltonian mechanics, which predict what a classical system will do in the future given its current configuration. Although the Schrödinger equation was published in 1926, the authors of a new study explain that the equation's origins are still not fully appreciated by many physicists.
http://phys.org/news284638321.html
PhysicsMon, 08 Apr 2013 11:30:01 EDTnews284638321Generating, sustaining electrical currents with unique properties for information processing closer to realitySpintronics is a form of signal processing similar to that used in traditional electronics, but it takes advantage of a property of electrons known as spin. Spin is often visualized as an arrow about which the electron rotates, much like a top spinning around its axis. Generating a stream of electrons in which these 'arrows' are all parallel—a so-called spin-polarized current (see image)—is the foundation upon which spintronics is based. Imperfections in a material, however, can easily destroy polarization. Simply applying an oscillating voltage across the device could help to maintain a spin-polarized current even in the presence of impurities, according to theoretical research by Seng Ghee Tan at the A*STAR Data Storage Institute, Singapore, and co‐workers.
http://phys.org/news278749622.html
PhysicsWed, 30 Jan 2013 06:40:01 EDTnews278749622At last, how many alien civilizations are there?During the space age, 1961 was a special year: the Russian cosmonaut Yuri Gagarin became the first man to orbit Earth, while the American astronomer Frank Drake developed the now famous Drake Equation. This equation estimates the number of detectable extraterrestrial civilizations in our Milky Way galaxy, supposing our present electromagnetic detection methods. The Drake equation states:
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Astronomy & SpaceMon, 03 Dec 2012 06:52:04 EDTnews273739899Outside a vacuum: Model predicts movement of charged particles in complex mediaPicture two charged particles in a vacuum. Thanks to laws of elementary electrostatics, we can easily calculate the force these particles exert upon one another, and therefore predict their movements.
http://phys.org/news273323541.html
PhysicsWed, 28 Nov 2012 11:12:31 EDTnews273323541Mathematician announces that he's proved the ABC conjecture(Phys.org)—In all of history there are very few names that stand out in the field of mathematics, at least among those not in the field: Euclid, Newton, Pythagoras, etc. This is likely due to several reasons, chief among them is that math is so seldom used by most people and the fact that its use in other sciences causes the underlying concepts to become overshadowed. That might change if what Shinichi Mochizuki of Kyoto University is claiming is true; that he has written a proof of the ABC conjecture. To mathematicians it's akin to the Grand Unified Theory of physics, a proof that would tie together most of the fundamental ideas in the field into one neat, fully explainable bundle.
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Other SciencesWed, 12 Sep 2012 07:52:58 EDTnews266655119Do moons of gas giants affect the habitable zone?(PhysOrg.com) -- If you aren’t familiar with the Drake Equation, or how it may actually apply to exomoons, continue reading to learn more about the famous equation. Additionally, what conditions could make a habitable moon like Pandora as depicted in Avatar, or the forest Moon of Endor as seen in Return of the Jedi?
http://phys.org/news250340372.html
Astronomy & SpaceWed, 07 Mar 2012 11:01:01 EDTnews250340372Scientists revise the 60-year-old definition of surface tension on solidsResearchers of VTT Technical Research Centre of Finland have shown that surface tension on a solid material is unconnected to the energy required to create a new surface. Consequently, surface tension on a solid does not exist in its conventional meaning.
http://phys.org/news249561004.html
PhysicsMon, 27 Feb 2012 10:30:12 EDTnews249561004Aiding cancer therapy by mathematically modeling tumor-immune interactionsCancer is one of the five leading causes of death. And yet, despite decades of research, there is no standardized first-line treatment for most cancers. In addition, disappointing results from predominant second-line treatments like chemotherapy have established the need for alternative methods.
http://phys.org/news246717953.html
Other SciencesWed, 25 Jan 2012 12:46:06 EDTnews246717953New equation predicts molecular forces in hydrophobic interactionsThe physical model to describe the hydrophobic interactions of molecules has been a mystery that has challenged scientists and engineers since the 19th century. Hydrophobic interactions are central to explaining why oil and water don't mix, how proteins are structured, and what holds biological membranes together. Chemical engineering researchers at UC Santa Barbara have developed a novel method to study these forces at the atomic level, and have for the first time defined a mathematical equation to measure a substance's hydrophobic character.
http://phys.org/news237567575.html
ChemistryTue, 11 Oct 2011 16:01:57 EDTnews237567575Physicists discover 'magnetotoroidic effect'(PhysOrg.com) -- For many years, scientists have known about the magnetoelectric effect, in which an electric field can induce and control a magnetic field, and vice versa. In this effect, the electric field has always been homogeneous. Now, scientists have found that a curled electric field can also be used to control magnetic fields, constituting a novel phenomenon that they call the "magnetotoroidic effect."
http://phys.org/news236234204.html
PhysicsMon, 26 Sep 2011 08:10:01 EDTnews236234204Special report highlights 'greatest hits' of scientific supercomputingIn 2007, a report that concluded that the Earth was warming, probably as a result of human activities, resulted in a share of the Nobel Peace Prize. The United Nations Intergovernmental Panel on Climate Change's next assessment, expected in 2014, once again includes simulation data generated from DOE leadership supercomputers, this time at Oak Ridge and Argonne national laboratories. Next a team of researchers, led by Warren Washington of the National Center for Atmospheric Research, will use a 2011 allocation of 110 million processor hours at Argonne and Oak Ridge to begin the generation of the largest treasure trove of climate data to date.
http://phys.org/news234430786.html
TechnologyMon, 05 Sep 2011 08:40:12 EDTnews234430786Astrophysicists apply new logic to downplay the probability of extraterrestrial lifeDavid Spiegel and Edwin Turner of Princeton University have submitted a paper to arXiv that turns the Drake equation on its head. Instead of assuming that life would naturally evolve if conditions were similar to that found here on Earth, the two use Bayesian reasoning to show that just because we evolved in such conditions, doesn’t mean that the same occurrence would necessarily happen elsewhere; using evidence of our own existence doesn’t show anything they argue, other than that we are here.
http://phys.org/news230979224.html
Astronomy & SpaceWed, 27 Jul 2011 09:53:44 EDTnews230979224Predicting random violence by mathematics(PhysOrg.com) -- In a new study published in Science, researchers, led by physicist Neil Johnson from the University of Miami, show that attacks by groups such as the Taliban or Hezbollah may seem sporadic, they eventually begin to follow a mathematical pattern.
http://phys.org/news228742466.html
Other SciencesFri, 01 Jul 2011 12:34:57 EDTnews228742466Genius of Einstein, Fourier key to new humanlike computer vision(PhysOrg.com) -- Two new techniques for computer-vision technology mimic how humans perceive three-dimensional shapes by instantly recognizing objects no matter how they are twisted or bent, an advance that could help machines see more like people.
http://phys.org/news227805375.html
TechnologyMon, 20 Jun 2011 16:16:46 EDTnews227805375Rogue wave recreated in laboratory tank(PhysOrg.com) -- A team of researchers have used a mathematical equation to create a so called "rogue" wave; the giant kind that appear out of nowhere in the open ocean to topple ships and drown their crews. Using one solution to the non-linear Schroedinger equation; the Peregrine solution; first discovered in 1983, the team of researchers have published a paper in Physical Review Letters, where they describe how by using paddles and a water tank, they were able to create a miniature version of a rogue wave in their lab.
http://phys.org/news225445082.html
PhysicsTue, 24 May 2011 08:39:15 EDTnews225445082Could the combination of general relativity and quantum mechanics lead to spintronics?(PhysOrg.com) -- In the early 20th century, two famous discoveries about spin were made. One of them, discovered by Albert Einstein and Wander Johannes de Haas, explains a relationship between the spin of elementary particles. They found a relationship between magnetism and angular momentum. (Around that time, Einstein also put forth his theory of general relativity.) A little more than a decade later, Paul Dirac unveiled his equation dealing with a relativistic quantum mechanical wave, providing an explanation of electrons as elementary spin-1/2 particles.
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PhysicsThu, 03 Mar 2011 08:25:06 EDTnews218363088Mathematical model shows how groups split into factions(PhysOrg.com) -- The school dance committee is split; one group wants an "Alice in Wonderland" theme; the other insists on "Vampire Jamboree." Mathematics could have predicted it.
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Other SciencesTue, 04 Jan 2011 09:11:53 EDTnews213354681New equation calculates cost of walking for first timeWhy do tall people burn less energy per kilogram when walking than shorter ones do, and how much energy does walking require? These are basic questions that doctors, trainers, fitness buffs and weight-watchers would all like to have answered, and now researchers from Texas have derived a fundamental equation to calculate how much energy walkers use, based simply on height and weight, which has direct applications across all walks of life.
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Medicine & HealthFri, 12 Nov 2010 04:45:19 EDTnews208759507New equation could advance research in solar cell materials(PhysOrg.com) -- A groundbreaking new equation developed in part by researchers at the University of Michigan could do for organic semiconductors what the Shockley ideal diode equation did for inorganic semiconductors: help to enable their wider adoption.
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PhysicsWed, 20 Oct 2010 09:21:40 EDTnews206785274Quarks 'swing' to the tones of random numbersAt the Large Hadron Collider at CERN protons crash into each other at incredibly high energies in order to 'smash' the protons and to study the elementary particles of nature - including quarks. Quarks are found in each proton and are bound together by forces which cause all other known forces of nature to fade. To understand the effects of these strong forces between the quarks is one of the greatest challenges in modern particle physics. New theoretical results from the Niels Bohr Institute show that enormous quantities of random numbers can describe the way in which quarks ’swing’ inside the protons. The results have been published in arXiv and will be published in the journal Physical Review Letters.
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PhysicsMon, 27 Sep 2010 12:27:18 EDTnews204809213Meeting consumers' HD demands with a faster algorithm(PhysOrg.com) -- Engineers help smaller processors outperform a single superfast processor by working more efficiently in parallel.
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TechnologyWed, 07 Jul 2010 14:00:01 EDTnews197729807