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All posts; Tags Include "Precision Measurement"

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  • May 13, 2016
  • 09:21 AM

Using Supercomputers to Probe the Early Universe

by EE Giorgi in CHIMERAS

Artist's depiction of the WMAP satellite gathering data to understand the Big Bang. Source: NASA.For decades physicists have been trying to decipher the first moments after the Big Bang. Using very large telescopes, for example, scientists scan the skies and look at how fast galaxies move. Satellites study the relic radiation left from the Big Bang, called the cosmic microwave background radiation. And finally, particle colliders, like the Large Hadron Collider at CERN, allow researchers to smas........ Read more »

  • February 13, 2016
  • 05:02 AM

Now we can hear the Universe

by TakFurTheKaffe in Tak Fur The Kaffe

The detection of gravitational waves produced by the collision of two black holes over 1 billion light years away confirms Einstein's vision of our Universe.... Read more »

Abbott, B., Abbott, R., Abbott, T., Abernathy, M., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R.... (2016) Observation of Gravitational Waves from a Binary Black Hole Merger. Physical Review Letters, 116(6). DOI: 10.1103/PhysRevLett.116.061102  

  • April 23, 2015
  • 10:35 AM

of microwave noodles and extragalactic signals

by Greg Fish in weird things

FRBs just can’t seem to catch a break this month. First, they were an alien signal. Then just as quickly as they were attributed to aliens because the Daily Fail decided to get creative with two out of context words and no one seemed to bother to fact check them, the bursts were called a false signal caused by microwave interference. Not just any microwave interference mind you, but the kind in which you warm up leftovers [...]... Read more »

E. Petroff, E. F. Keane, E. D. Barr, J. E. Reynolds, J. Sarkissian, P. G. Edwards, J. Stevens, C. Brem, A. Jameson, S. Burke-Spolaor.... (2015) Identifying the source of perytons at the Parkes radio telescope. n/a. arXiv: 1504.02165v1

  • April 22, 2015
  • 12:29 PM

Microwave goodbye to inefficient spintronic microwave detectors

by Bryn Howells in Spin and Tonic

Magnetic tunnel junctions (MTJs) which comprise of a free magnetic layer (whose magnetization orientation can be manipulated) and a fixed magnetic layer (whose magnetization is...
The post Microwave goodbye to inefficient spintronic microwave detectors appeared first on Spin and Tonic.
... Read more »

  • April 21, 2015
  • 09:00 AM

peeking at dark matter during a tidal strip show

by Greg Fish in weird things

Dark matter is a substance that makes up nearly all mass in the universe, but decades after we discovered it, all we have are indirect measurements which show us that it’s there in very large amounts, forming galactic halos, but ultimately, little else. It doesn’t seem to interact with any of the stuff that makes stars, dust, and planets, it emits or reflects no radiation, and this utter lack of interesting properties we could study [...]... Read more »

Massey, R., Williams, L., Smit, R., Swinbank, M., Kitching, T., Harvey, D., Jauzac, M., Israel, H., Clowe, D., Edge, A.... (2015) The behaviour of dark matter associated with four bright cluster galaxies in the 10 kpc core of Abell 3827. Monthly Notices of the Royal Astronomical Society, 449(4), 3393-3406. DOI: 10.1093/mnras/stv467  

  • September 5, 2014
  • 06:31 PM

Higgs what?

by Marco Frasca in The Gauge Connection

In these days it has been announced the new version of Review of Particle Physics by the Particle Data Group (PDG). This is the bread and butter of any particle physicist and contains all the relevant data about this area of research. It is quite common for us to search the on-line version or using […]... Read more »

Marco Frasca. (2013) Scalar field theory in the strong self-interaction limit. Eur. Phys. J. C (2014) 74:2929. arXiv: 1306.6530v5

  • December 13, 2013
  • 09:48 AM

Imaging Technique Helps Control Plasma in Fusion Experiments

by dailyfusion in The Daily Fusion

A recently developed imaging technique, called Electron Cyclotron Emission Imaging (ECEI), can help researchers control plasma in fusion experiments.... Read more »

Tobias B., Yu L., Domier C.W., Luhmann Jr. N.C., Austin M.E., Paz-Soldan C., Turnbull A.D., Classen I.G.J. (2013) Boundary perturbations coupled to core 3/2 tearing modes on the DIII-D tokamak. Plasma Physics and Controlled Fusion, 55(9). DOI: 10.1088/0741-3335/55/9/095006  

  • December 12, 2013
  • 10:16 AM

Scientists Watch as Solar Cell Degrades in Real Time

by dailyfusion in The Daily Fusion

Using X-ray imaging, scientists at the Technical University of Munich (TUM) were able to watch an organic solar cell degrade in real time. These new observations will help scientists to find new ways to increase the stability of organic solar cells.... Read more »

Schaffer C.J., Palumbiny C.M., Niedermeier M.A., Jendrzejewski C., Santoro G., Roth S.V., & Müller-Buschbaum P. (2013) A direct evidence of morphological degradation on a nanometer scale in polymer solar cells. Advanced Materials, 25(46), 6760-4. PMID: 24027092  

  • August 7, 2013
  • 03:36 PM

Brookhaven Lab Scientists Discover Anomalous Behavior of High-Temperature Superconductors

by dailyfusion in The Daily Fusion

Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled to a temperature of hundreds of degrees below zero. Warmed beyond those frigid conditions, the materials cross a critical temperature threshold and the superconductivity breaks down. But high-temperature superconductors (HTS)—warmer, but still subzero—may have untapped potential because their underlying mechanism remains a mystery. Unlock........ Read more »

J. Wu,O. Pelleg, G. Logvenov, A.T. Bollinger, Y-J. Sun, G.S. Boebinger, M. Vanević, Z. Radović, I. Božović. (2013) Anomalous independence of interface superconductivity from carrier density. Nature Materials. DOI: 10.1038/nmat3719  

  • June 13, 2013
  • 10:04 AM

New Picture of Ice Could Revolutionize Gas Hydrates Understanding, Hydrogen Storage

by dailyfusion in The Daily Fusion

A collaboration between Oak Ridge National Laboratory researchers and a team led by the Carnegie Institution for Science’s Malcolm Guthrie has led to discoveries about how ice behaves under pressure, changing ideas that date back almost 50 years. The findings could alter scientists’ understanding of how the water molecule responds to conditions found deep within planets and could have implications for energy science.... Read more »

Guthrie, M., Boehler, R., Tulk, C., Molaison, J., dos Santos, A., Li, K., & Hemley, R. (2013) Neutron diffraction observations of interstitial protons in dense ice. Proceedings of the National Academy of Sciences. DOI: 10.1073/pnas.1309277110  

  • June 9, 2013
  • 12:30 PM

Atomic identity checks

by Joerg Heber in All That Matters

It become pretty much a routine, albeit an expensive one, to use transmission electron microscopes for imaging atoms in a crystal. But what has often been missing from those images is a crucial bit of information, the identity of the chemical element that has been looked at. Of course, the grey scales in the contrast […]... Read more »

  • June 4, 2013
  • 11:35 AM

New Graphene Applications in Energy Review

by dailyfusion in The Daily Fusion

Like diamond or graphite, graphene is a structural modification (an allotrope) of carbon, that has many special properties that make it a very useful material with great potential for application in technology. In essence, graphene is an isolated atomic plane of graphite, which is very light (1-square-meter sheet weighing only 0.77 milligrams) and at the same time very strong (graphene has a breaking strength over 100 times greater than a hypothetical steel film of the same thickness). The elect........ Read more »

Connolly, M., Chiu, K., Giblin, S., Kataoka, M., Fletcher, J., Chua, C., Griffiths, J., Jones, G., Fal'ko, V., Smith, C.... (2013) Gigahertz quantized charge pumping in graphene quantum dots. Nature Nanotechnology. DOI: 10.1038/nnano.2013.73  

Britnell, L., Ribeiro, R., Eckmann, A., Jalil, R., Belle, B., Mishchenko, A., Kim, Y., Gorbachev, R., Georgiou, T., Morozov, S.... (2013) Strong Light-Matter Interactions in Heterostructures of Atomically Thin Films. Science. DOI: 10.1126/science.1235547  

  • May 14, 2013
  • 03:16 PM

Graphene Redefines Electric Current, Literally

by dailyfusion in The Daily Fusion

A new joint innovation by the National Physical Laboratory (NPL) and the University of Cambridge could pave the way for redefining the ampere in terms of fundamental constants of physics. The world’s first graphene single-electron pump (SEP) provides the speed of electron flow needed to create a new standard for electrical current based on electron charge.... Read more »

Connolly, M., Chiu, K., Giblin, S., Kataoka, M., Fletcher, J., Chua, C., Griffiths, J., Jones, G., Fal'ko, V., Smith, C.... (2013) Gigahertz quantized charge pumping in graphene quantum dots. Nature Nanotechnology. DOI: 10.1038/nnano.2013.73  

  • April 15, 2013
  • 09:41 AM

Falling faster than gravity

by sedeer in Inspiring Science

In 2011, a team of physicists at Cornell University in Ithaca, New York showed that when a falling chain hits …Continue reading »... Read more »

  • January 13, 2013
  • 07:44 AM

Measuring mass by telling the time

by Joerg Heber in All That Matters

How do you measure mass with high precision? This is not an easy question, as it is very difficult to measure the weight of something with the same ultra-high precision with which atomic clocks measure time. To this day, the kilogram is defined by a piece of metal made of platinum and iridium that is stored in Paris. [...]... Read more »

Lan, S., Kuan, P., Estey, B., English, D., Brown, J., Hohensee, M., & Muller, H. (2013) A Clock Directly Linking Time to a Particle's Mass. Science. DOI: 10.1126/science.1230767  

  • January 7, 2013
  • 04:00 PM

why absolute zero isn’t theoretically absolute

by Greg Fish in weird things

Suppose you take some potassium atoms and put them in a vacuum where you cool them to as close to absolute zero as you possibly can in a lab. What you’ve done is reduced the entropy of this system of atoms because the colder it gets, the less kinetic energy they have, and the less energy they could exchange with each other. [...]... Read more »

Braun, S., Ronzheimer, J., Schreiber, M., Hodgman, S., Rom, T., Bloch, I., & Schneider, U. (2013) Negative absolute temperature for motional degrees of freedom. Science, 339(6115), 52-55. DOI: 10.1126/science.1227831  

  • December 19, 2012
  • 06:00 PM

what alcohol can tell us about the fate of the universe

by Greg Fish in weird things

Once upon a time, we looked at an explanation for dark matter involving a theory about how all matter around us could decay over 6.6 × 10^33 years and noted that there’s a controversy as to whether protons actually decay. To help settle this, astronomers took advantage of the fact that telescopes are relativistic time machines, and peered through them at a galaxy known as PKS 1830-211 — a name only a scientist could love — that just so happens to be a gravitational lens a........ Read more »

  • December 18, 2012
  • 04:00 PM

and now for something surprisingly simpler

by Greg Fish in weird things

Usually a new discovery in deep space tends to further complicate our picture of the universe, almost as if the cosmos says "oh yeah, you think you have a good idea of how this works?" and throws a monkey wrench into the works, or sometimes, the whole screaming, angry monkey. So when it comes to phenomena as complex and exciting as black holes, surely there can’t be any data that makes them easier to understand. [...]... Read more »

Nemmen, R., Georganopoulos, M., Guiriec, S., Meyer, E., Gehrels, N., & Sambruna, R. (2012) A Universal Scaling for the Energetics of Relativistic Jets from Black Hole Systems. Science, 338(6113), 1445-1448. DOI: 10.1126/science.1227416  

  • March 16, 2012
  • 05:24 PM

are neutrino beams the wi-fi of the future?

by Greg Fish in weird things

Say you need to communicate not just with someone or something far away, but someone or something very, very deep underground, or underwater, or on the other side of a planet. You could create satellite relays which will bounce the signal around to get to your target wherever it is in space, but that requires [...]... Read more »

D. D. Stancil, P. Adamson, M. Alania, L. Aliaga, M. Andrews, C. Araujo Del Castillo, L. Bagby, J. L. Bazo Alba, A. Bodek, D. Boehnlein.... (2012) Demonstration of Communication using Neutrinos. Phys Let A. arXiv: 1203.2847v1

  • March 14, 2012
  • 09:30 PM

Sonification: Listen To The Sun / Listen To CERN's LHC

by DJ Busby in Astronasty

Solar storm data has recently been translated through a process called sonification into audio. CERN uses this technology too. Here are videos and explanations for both.... Read more »

Alberto de Campo, Natascha Hormann, Harald Markum, Willibald Plessas, & Bianka Sengi. (2005) Sonification of lattice data: The spectrum of the Dirac operator across the deconfinement transition. Proceedings of Science. info:other/PoS: LAT2005-152

Katharina Vogt, Robert H¨oldrich, David Pirr`o, Martin Rumori, Stefan Rossegger, Werner Riegler, & Matevˇz Tadel. (2010) A SONIC TIME PROJECTION CHAMBER. SONIFIED PARTICLE DETECTION AT CERN. International Conference on Auditory Display. info:other/ISBN: 0-9670904-3-1

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