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thinkahol *

Graphene may reveal the grain of space-time - physics-math - 13 May 2011 - New Scientist - 1 views

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    COULD the structure of space and time be sketched out inside a cousin of plain old pencil lead? The atomic grid of graphene may mimic a lattice underlying reality, two physicists have claimed, an idea that could explain the curious spin of the electron. Graphene is an atom-thick layer of carbon in a hexagonal formation. Depending on its position in this grid, an electron can adopt either of two quantum states - a property called pseudospin which is mathematically akin to the intrinsic spin of an electron. Most physicists do not think it is true spin, but Chris Regan at the University of California, Los Angeles, disagrees. He cites work with carbon nanotubes (rolled up sheets of graphene) in the late 1990s, in which electrons were found to be reluctant to bounce back off these obstacles. Regan and his colleague Matthew Mecklenburg say this can be explained if a tricky change in spin is required to reverse direction. Their quantum model of graphene backs that up. The spin arises from the way electrons hop between atoms in graphene's lattice, says Regan. So how about the electron's intrinsic spin? It cannot be a rotation in the ordinary sense, as electrons are point particles with no radius and no innards. Instead, like pseudospin, it might come from a lattice pattern in space-time itself, says Regan. This echoes some attempts to unify quantum mechanics with gravity in which space-time is built out of tiny pieces or fundamental networks (Physical Review Letters, vol 106, p 116803). Sergei Sharapov of the National Academy of Sciences of Ukraine in Kiev says that the work provides an interesting angle on how electrons and other particles acquire spin, but he is doubtful how far the analogy can be pushed. Regan admits that moving from the flatland world of graphene to higher-dimensional space is tricky. "It will be interesting to see if there are other lattices that give emergent spin," he says.
thinkahol *

Which-way detector unlocks some mystery of the double-slit experiment - 1 views

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    (PhysOrg.com) -- One of the greatest puzzles of the double-slit experiment - and quantum physics in general - is why electrons seem to act differently when being observed. While electrons traveling through a barrier with two slits create interference patterns when unobserved, these interference patterns disappear when scientists detect which slit each electron travels through. By designing a modified version of the double-slit experiment with a new "which-way" electron detector at one of the slits, a team of scientists from Italy has found a clue as to why electron behavior appears to change when being observed.
anonymous

Study The Electron Spin Resonance With Trivedi Science Research - 0 views

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    An analysis of the changes in the spin state is done with the help of absorption spectra is known as the electron spin resonance. If you are wondering what an electronic spin resonance means, then this article will explain you about it in detail.
thinkahol *

Berkeley Lab scientists open electrical link to living cells | KurzweilAI - 0 views

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    Scientists with the Lawrence Berkeley National Laboratory (Berkeley Lab) have designed an electrical link to living cells engineered to shuttle electrons across a cell's membrane to an external acceptor along a well-defined path. This direct channel could yield cells that can read and respond to electronic signals, electronics capable of self-replication and repair, or efficiently transfer sunlight into electricity.
Charles Daney

After the Transistor, a Leap Into the Microcosm - NYTimes.com - 0 views

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    The shrinking of the transistor has approached fundamental physical limits. Increasingly, transistor manufacturers grapple with subatomic effects, like the tendency for electrons to "leak" across material boundaries. The leaking electrons make it more difficult to know when a transistor is in an on or off state, the information that makes electronic computing possible. They have also led to excess heat, the bane of the fastest computer chips.
thinkahol *

Smallest atomic displacements ever may lead to new new classes of electronic devices | ... - 0 views

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    An international team of scientists has developed a novel X-ray technique for imaging atomic displacements in materials with unprecedented accuracy, using a recently discovered class of exotic materials - multiferroics - that can be simultaneously magnetically and electrically ordered. Multiferroics are also candidate materials for new classes of electronic devices. The researchers are from the European Synchrotron Radiation Facility (ESRF) in Grenoble (France), the University of Oxford, and the University College London.
anonymous

Electron Spin Resonance Analysis on Polymers - 0 views

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    Various polymers were tested for electron spin resonance (ESR) done at (SAIF) - IIT- Bombay to see the impact of The Trivedi Effect.
Janos Haits

The Journal of Electronic Publishing - 0 views

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    "The Journal of Electronic Publishing (JEP) is a forum for research and discussion about contemporary publishing practices, and the impact of those practices upon users."
thinkahol *

Plastic computer memory device uses spin of electrons to read and write data | KurzweilAI - 0 views

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    "Researchers at Ohio State University have demonstrated the first plastic computer memory device that utilizes the spin of electrons to read and write data. An alternative to traditional microelectronics, the "spintronics" device could store more data in less space, process data faster, and consume less power."
Infogreen Global

Researchers study quantum dots to increase the amount of electricity solar panels produce - 0 views

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    Quantum dots are man-made atoms that confine electrons to a small space. They have atomic-like behavior that results in unusual electronic properties on a nanoscale. These unique properties may be particularly valuable in tailoring the way light interacts with matter.
Spz Kaz

Samsung's Transparent Smart Window at CES 2012 - 0 views

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    Samsung's Transparent Window got a lot of attention at the 2012 Consumer Electronics Show in Las Vegas. Watch this video to find out why!
Maluvia Haseltine

Electron Beams Whip Up A Quantum Tornado - 0 views

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    "A group of researchers have developed what are known as vortex beams - rotating electron beams - which make it possible to investigate the magnetic properties of materials and in the future it may be possible to manipulate the tiniest components in a targeted manner and set them in rotation also."
Skeptical Debunker

Scientists find an equation for materials innovation - 0 views

  • By reworking a theory first proposed by physicists in the 1920s, the researchers discovered a new way to predict important characteristics of a new material before it's been created. The new formula allows computers to model the properties of a material up to 100,000 times faster than previously possible and vastly expands the range of properties scientists can study. "The equation scientists were using before was inefficient and consumed huge amounts of computing power, so we were limited to modeling only a few hundred atoms of a perfect material," said Emily Carter, the engineering professor who led the project. "But most materials aren't perfect," said Carter, the Arthur W. Marks '19 Professor of Mechanical and Aerospace Engineering and Applied and Computational Mathematics. "Important properties are actually determined by the flaws, but to understand those you need to look at thousands or tens of thousands of atoms so the defects are included. Using this new equation, we've been able to model up to a million atoms, so we get closer to the real properties of a substance." By offering a panoramic view of how substances behave in the real world, the theory gives scientists a tool for developing materials that can be used for designing new technologies. Car frames made from lighter, strong metal alloys, for instance, might make vehicles more energy efficient, and smaller, faster electronic devices might be produced using nanowires with diameters tens of thousands of times smaller than that of a human hair.
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    Princeton engineers have made a breakthrough in an 80-year-old quandary in quantum physics, paving the way for the development of new materials that could make electronic devices smaller and cars more energy efficient.
Janos Haits

Project MUSE - 0 views

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    Project MUSE is a leading provider of digital humanities and social sciences content; since 1995, its electronic journal collections have supported a wide array of research needs at academic, public, special, and school libraries worldwide. MUSE books and journals, from leading university presses and scholarly societies, are fully integrated for search and discovery.
Sarah Rogers

Netgear wireless router setup call on 1 855 856 2653- Netgear is now at its new lifetim... - 0 views

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    The shares of Netgear are now at their all-time maximum value. This is due to the efficient products that the company has been making in all these years. The routers and modems are easy to use and works on all kinds of electronic devices.
Janos Haits

Wikipedia:Books - Wikipedia, the free encyclopedia - 0 views

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    A Wikipedia Book is a collection of Wikipedia articles that can be easily saved, rendered electronically in PDF, ZIM or OpenDocument format, or ordered as a printed book. For information and help on Wikipedia books in general, see Help:Books (general tips) and WikiProject Wikipedia-Books (questions and assistance).
Janos Haits

MarilynMonrobot - 0 views

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    Heather is currently conducting her doctoral research at Carnegie Mellon's Robotics Institute and running Marilyn Monrobot Labs in NYC, which creates socially intelligent robot performances and sensor-based electronic art. Founder of the Robot Film Festival and Cyborg Cabaret, Heather was on the 2011 Forbes List for 30 under 30 in Science.
Janos Haits

Synthetic Biology Open Language - 0 views

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    Synthetic Biology Open Language (SBOL) is a software standard for the electronic exchange of specifications and descriptions of genetic parts, devices, modules, systems, and engineered genomes.
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