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The latest
physics news, from the most reliable sources, all in one place.
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Speed limit on the quantum highway: Physicists measure propagation velocity of quantum signals in a many-body system |
| A quantum computer based on quantum particles instead of classical bits, can in principle outperform any classical computer. However, it still remains an open question, how fast and how efficient quantum computers really may be able to work. A critical limitation will be given by the velocity with which a quantum signal can spread within a processing unit. For the first time, a group of physicists has succeeded in observing such a process in a solid-state like system. |
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Jupiter’s 'Trojans' on an atomic scale |
| The planet Jupiter keeps asteroids on stable orbits -- and in a similar way, electrons can be stabilized in their orbit around the atomic nucleus. Calculations have now been verified in a new experiment. |
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Lab mimics Jupiter's Trojan asteroids inside a single atom |
| Physicists have built an accurate model of part of the solar system inside a single atom. Scientists have shown that they could make an electron orbit the atomic nucleus in the same way that Jupiter's Trojan asteroids orbit the sun. The findings uphold a 1920 prediction by physicist Niels Bohr. |
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Parting the clouds |
Arnold Wolfendale reviews Earth: the Operator’s Manual by Richard Alley |
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Between the lines |
A new biography of Stephen Hawking and a history of radioactivity, reviewed by Margaret Harris |
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Voyagers of discovery |
John Zarnecki reviews Stephen Pyne’s Voyager: Seeking New Worlds in the Third Great Age of Discovery |
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Multi-machine comparison of drift fluid dimensionless parameters |
Author(s): F Militello and W Fundamenski
Affiliation(s): EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, Oxon, OX14 3DB, UK |
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Simple 1D Fokker–Planck modelling of ion cyclotron resonance frequency heating at arbitrary cyclotron harmonics accounting for Coulomb relaxation on non-Maxwellian populations |
Author(s): Dirk Van Eester and Ernesto Lerche
Affiliation(s): Laboratorium voor Plasmafysica - Laboratoire de Physique des Plasmas, Association 'EURATOM - Belgian State', Trilateral Euregio Cluster, Renaissancelaan 30 Avenue de la Renaissance, B-1000, Brussels, Belgium |
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Interaction of a laser-produced copper plasma jet with ambient plastic plasma |
Author(s): A Kasperczuk, T Pisarczyk, J Badziak, S Borodziuk, T Chodukowski, S Yu Gus'kov, N N Demchenko, D Klir, J Kravarik, P Kubes, K Rezac, J Ullschmied, E Krousky, K Masek, M Pfeifer, K Rohlena, J Skala and P Pisarczyk
Affiliation(s): Institute of Plasma Physics and Laser Microfusion, 23 Hery St., 00-908 Warsaw, Poland; P.N. Lebedev Physical Institute of RAS, 53 Leninsky Ave., 119 991 Moscow, Russia; Czech Technical University in Prague, FEE, Prague, Czech Republic; Institute of Plasma Physics ASCR, v.v.i., Za Slovankou 3, 182 00 Prague 8, Czech Republic; Institute of Physics ASCR, v.v.i., Na Slovance 2, 182 21 Prague 8, Czech Republic; Warsaw University of Technology, ICS, 15/19 Nowowiejska St., 00-665 Warsaw, Poland |
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Making memories last: Prion-like protein plays key role in storing long-term memories |
| Memories in our brains are maintained by connections between neurons called "synapses". But how do these synapses stay strong and keep memories alive for decades? Neuroscientists at the Stowers Institute for Medical Research have discovered a major clue from a study in fruit flies: Hardy, self-copying clusters or oligomers of a synapse protein are an essential ingredient for the formation of long-term memory. |
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Investors clamor for Facebook's IPO |
| Wall Street is about to get Facebook fever. The social networking giant with nearly 1 billion users is expected to file papers any day now to sell stock to the public. The timing stems partly from federal rules that would require Facebook Inc. to begin disclosing its financial information in April because of its phenomenal growth. |
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Report: Facebook IPO filing could come next week |
| Facebook could file regulatory papers as early as Wednesday for its highly anticipated initial public offering of stock, according to a newspaper report. |
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UT researchers' innovation addresses major challenge of drug delivery |
| (University of Texas at Austin) A new physical form of proteins developed by researchers at the University of Texas at Austin could drastically improve treatments for cancer and other diseases, as well as overcome some of the largest challenges in therapeutics: Delivering drugs to patients safely, easily and more effectively. |
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Space Weather Center to add world's first 'ensemble forecasting' capability |
| (NASA/Goddard Space Flight Center) Goddard's Space Weather Laboratory recently received support under NASA's Space Technology Program Game Changing Program to implement "ensemble forecasting," a computer technique already used by meteorologists to track potential paths and impacts of hurricanes and other severe weather events. |
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The secret life of proteins |
| (Northwestern University) Researchers have identified a new and unusual role for a key player in the human immune system. A protein initially believed to regulate one routine function within the cell has proven vital for another critical step in the activation of the immune system. |
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A generic model of real-world non-ideal behaviour of FES-induced muscle contractions: simulation tool |
Author(s): Cheryl L Lynch, Geoff M Graham and Milos R Popovic
Affiliation(s): Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada; Toronto Rehabilitation Institute, Toronto, Canada |
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High molecular weight hyaluronic acid limits astrocyte activation and scar formation after spinal cord injury |
Author(s): Zin Z Khaing, Brian D Milman, Jennifer E Vanscoy, Stephanie K Seidlits, Raymond J Grill and Christine E Schmidt
Affiliation(s): Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA; Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA; Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA |
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Predicting myelinated axon activation using spatial characteristics of the extracellular field |
Author(s): E J Peterson, O Izad and D J Tyler
Affiliation(s): Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA; Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, USA |
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