Phys.org news tagged with:geometric structures
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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.New mathematical method reveals structure in neural activity in the brainA newly-developed mathematical method can detect geometric structure in neural activity in the brain. "Previously, in order to understand this structure, scientists needed to relate neural activity to some specific external stimulus," said Vladimir Itskov, associate professor of mathematics at Penn State University. "Our method is the first to be able to reveal this structure without our knowing an external stimulus ahead of time. We've now shown that our new method will allow us to explore the organizational structure of neurons without knowing their function in advance."
http://phys.org/news/2015-10-mathematical-method-reveals-neural-brain.html
Mathematics Mon, 19 Oct 2015 17:12:59 ESTnews364493571Inspired by venus flytrap, researchers develop folding 'snap' geometryInspired by natural "snapping" systems like Venus flytrap leaves and hummingbird beaks, a team led by physicist Christian Santangelo at the University of Massachusetts Amherst has developed a way to use curved creases to give thin curved shells a fast, programmable snapping motion. The new technique avoids the need for complicated materials and fabrication methods when creating structures with fast dynamics.
http://phys.org/news/2015-08-venus-flytrap-snap-geometry.html
General Physics Fri, 21 Aug 2015 10:51:25 ESTnews359373073Scanning tunnelling microscopy: Computer simulations sharpen insights into moleculesThe resolution of scanning tunnelling microscopes can be improved dramatically by attaching small molecules or atoms to their tip. The resulting images were the first to show the geometric structure of molecules and have generated a lot of interest among scientists over the last few years. Scientists from Forschungszentrum Jülich and the Academy of Sciences of the Czech Republic in Prague have now used computer simulations to gain deeper insights into the physics of these new imaging techniques. One of these techniques was presented in the journal Science by American scientists this spring. The results have now been published in the journal Physical Review Letters.
http://phys.org/news/2014-11-scanning-tunnelling-microscopy-simulations-sharpen.html
Nanophysics Thu, 27 Nov 2014 18:14:11 ESTnews336334443Unlocking milk's formula could save lives, say scientists(Phys.org) —A new study on the digestion of milk could lead to the development of new formulas for premature babies, weight loss drinks and potentially new drug delivery systems.
http://phys.org/news/2014-06-formula-scientists.html
Nanophysics Mon, 23 Jun 2014 08:20:02 ESTnews322729057Rota's Conjecture: Researcher solves 40-year-old math problem(Phys.org) —A Victoria University mathematician has experienced his own eureka moment, solving a 40 year-old mathematical problem.
http://phys.org/news/2013-08-rota-conjecture-year-old-math-problem.html
Mathematics Thu, 15 Aug 2013 09:13:05 ESTnews2957767623-D printing artificial boneResearchers working to design new materials that are durable, lightweight and environmentally sustainable are increasingly looking to natural composites, such as bone, for inspiration: Bone is strong and tough because its two constituent materials, soft collagen protein and stiff hydroxyapatite mineral, are arranged in complex hierarchical patterns that change at every scale of the composite, from the micro up to the macro.
http://phys.org/news/2013-06-d-artificial-bone.html
Materials Science Mon, 17 Jun 2013 11:13:48 ESTnews290686417Building 3-D fractals on a nano scaleIt starts with one 3D structure with eight planes, an octahedron. This repeats itself to smaller octahedra: 625 after just four steps. At every corner of a new octahedron, a successive octahedron is formed. A truly fascinating 3D fractal 'building' is formed on the micro and nano scale. It can be used for high performance filtering, for example. Scientists of the MESA+ Institute for Nanotechnology of the University of Twente in The Netherlands present these structures in the Journal of Micromechanics and Microengineering (JMM).
http://phys.org/news/2013-05-d-fractals-nano-scale.html
Nanophysics Fri, 31 May 2013 10:15:18 ESTnews289214110Gravity's lingua franca: Unifying general relativity and quantum theory through spectral geometry(Phys.org) —Mathematics is, in essence, an artificial language for precisely articulating theories about the physical world. Unlike natural language, however, translating different classes of mathematics can be difficult at best. Such is the case encountered in the attempt to unify general relativity and quantum theory, since they are expressed in differential geometry and functional analysis, respectively. That being said, spectral geometry – a field in mathematics which concerns relationships between geometric structures of manifolds and spectra of canonically defined differential operators – may resolve this long-standing quandary by allowing spacetime to be treated as simultaneously continuous and discrete, essentially relating the frequency-based ringing of the fabric of spacetime to its manifold-based shape. Recently, scientists at California Institute of Technology, Princeton University, University of Waterloo, and University of Queensland normalized and segmented spectral geometry into small, finite-dimensional steps. They then demonstrated their approach of calculating the shapes of two-dimensional objects from their vibrational spectra as being viable in two, and possibly more, dimensions.
http://phys.org/news/2013-04-gravity-lingua-franca-relativity-quantum.html
Quantum Physics Mon, 29 Apr 2013 11:00:01 ESTnews286449018New taxonomy of platinum nanoclustersThe unexpected diversity of metallic nanoclusters' inner structure has now been catalogued into families. Physicists have gained new insights into the inner intricacies of the structural variations of metallic nanoclusters. This work by Luca Pavan, Cono Di Paola and Francesca Baletto from King's College London, UK, is about to be published in European Physical Journal D. It takes us one step closer to tailoring on-demand characteristics of metallic nanoparticles. Indeed, the geometric structure of these nanoclusters influences their chemical and physical properties, which differ from those of individual molecules and of bulk metals.
http://phys.org/news/2013-02-taxonomy-platinum-nanoclusters.html
Nanophysics Wed, 20 Feb 2013 10:03:40 ESTnews280577009Scientists train honey bees to stick out their tonguesHoney bees are a highly organized, social species, as demonstrated by their complex colonies and the geometric structure of their hives. For hive building, the honey bee strongly relies on its tactile sense, and a new video-article in JoVE (Journal of Visualized Experiments) illustrates a novel tactile conditioning experiment using honey bees. The technique, presented by the lab of Dr. Volker Dürr of Bielefeld University, trains honey bees to stick out their tongues when their antennae touch an object. This procedure allows researchers to analyze how changes in antennal movement correspond to tactile pattern recognition and learning.
http://phys.org/news/2012-12-scientists-honey-bees-tongues.html
Plants & Animals Wed, 12 Dec 2012 12:52:16 ESTnews274539121Mathematical physics reveal nature's formula for survival (w/ Video)(Phys.org) -- The vascular system of a leaf provides its structure and delivers its nutrients. When you light up that vascular structure with some fluorescent dye and view it using time-lapse photography, details begin to emerge that reveal nature's mathematical formula for survival.
http://phys.org/news/2012-05-mathematical-physics-reveal-nature-formula.html
Mathematics Mon, 14 May 2012 17:28:37 ESTnews256235287Beam trap full of holes: Researchers develop new surfaces for radar absorptionSwiss researchers from ETH Zurich's Institute for Field Theory and High Frequency Electronics have developed new surfaces for radar absorption. Thanks to this multifaceted application, window panes could even double up as solar panels in future.
http://phys.org/news/2010-09-full-holes-surfaces-radar-absorption.html
Engineering Thu, 09 Sep 2010 10:02:56 ESTnews203245303Mathematics + Supercomputers = Big Bang Explained(PhysOrg.com) -- Mathematician Daniel Reynolds is using supercomputers to unravel the mysteries of the Big Bang.
http://phys.org/news/2010-07-mathematics-supercomputers-big.html
General Physics Thu, 08 Jul 2010 14:09:43 ESTnews197816941Using magnetic toys as inspiration, researchers tease out structures of self-assembled clustersScientists have long studied how atoms and molecules structure themselves into intricate clusters. Unlocking the design secrets of Nature offers lessons in engineering artificial systems that could self-assemble into any desired form.
http://phys.org/news/2010-01-magnetic-toys-self-assembled-clusters.html
Condensed Matter Thu, 28 Jan 2010 14:00:04 ESTnews183909154New breakthrough in bubble researchA researcher from the University of Bath has found a new approach to an old geometric problem of modelling the most efficient way of packing shapes to form a foam.
http://phys.org/news/2009-09-breakthrough.html
Mathematics Wed, 02 Sep 2009 12:46:07 ESTnews171114233