Skip to main content

Home/ Advanced Concepts Team/ Group items tagged phys

Rss Feed Group items tagged

annaheffernan

Self-assembly and plasmonics could join forces to boost solar energy - 2 views

  •  
    Bio-inspired assembly of fluorescent molecules boosts the fluorescence output.
  •  
    Nice read! It is actually part of the Ariadna PETE study of one of the teams. You can supervise if you want :)
annaheffernan

High-gain optical transistors flipped by just one photon - 0 views

  •  
    Two research teams have designed an optical gate that can 'switch off' a stream of photons as well as store them ... good news for optical communications as well as future photon-based quantum information systems.
Athanasia Nikolaou

Media Gallery for summer inspiration - 1 views

  •  
    Bifurcations, patterns and other visualised mathematical problems for zen. Even found an oscillatory chemical reaction "Belousov-Zhabotinsky". Had no idea such a thing existed :-)
johannessimon81

Physicists Prove Surprising Rule of Threes - 6 views

  •  
    More than 40 years after a Soviet nuclear physicist proposed an outlandish theory that trios of particles can arrange themselves in an infinite nesting-doll configuration, experimentalists have reported strong evidence that this bizarre state of matter is real.
Thijs Versloot

Bionic liquids from lignin - liberating sugars in advanced biofuels - 0 views

  •  
    While the powerful solvents known as ionic liquids show great promise for liberating fermentable sugars from lignocellulose and improving the economics of advanced biofuels, an even more promising candidate is on the horizon - bionic liquids. Read more at: http://phys.org/news/2014-08-bionic-liquids-lignin-results-pave.html#jCp
Christophe Praz

Gallery of Fluid Motion - 0 views

  •  
    Awarded videos of fluid motion presented at the APS DVD meeting. Very cool stuff. #0084 is done with the setup I used for my master thesis.
Christophe Praz

Mars Spacecraft Reveal Comet Flyby Effects on Martian Atmosphere - 1 views

  •  
    NASA and ESA spacecraft have gathered new information about the basic properties of the comet's nucleus (not 67p) and directly detected the effects on the Martian atmosphere. Dust from the comet impacted Mars and was vaporized high in the atmosphere, producing what was likely an impressive meteor shower. Eight different types of metal ions have been detected, including sodium, magnesium and iron. The satellites will now continue to look for long-term perturbations to Mars' atmosphere.
annaheffernan

Black-hole mergers cast kaleidoscope of shadows - 6 views

  •  
    In Interstellar, the science-fiction film out this week, Matthew McConaughey stars as an astronaut contending with a supermassive black hole called Gargantua. The film's special effects have been hailed as the most realistic depiction ever made of this type of cosmic object. But astrophysicists have now gone one better - this is a really cool visualisation done by researchers in Cornell.
  •  
    Wow, impressive! Simulating eXtreme Spacetimes (SXS) software, very quick merging process though 17ms.. Observable?
  •  
    Mind-blowing!
johannessimon81

How Building a Black Hole for Interstellar Led to an Amazing Scientific Discovery | WIRED - 2 views

  •  
    Kip Thorne looks into the black hole he helped create and thinks, "Why, of course. That's what it would do." This particular black hole is a simulation of unprecedented accuracy. It appears to spin at nearly the speed of light, dragging bits of the universe along with it.
LeopoldS

physicists explain what AI researchers are actually doing - 5 views

  •  
    love this one ... it seems to take physicist to explain to the AI crowd what they are actually doing ... Deep learning is a broad set of techniques that uses multiple layers of representation to automatically learn relevant features directly from structured data. Recently, such techniques have yielded record-breaking results on a diverse set of difficult machine learning tasks in computer vision, speech recognition, and natural language processing. Despite the enormous success of deep learning, relatively little is understood theoretically about why these techniques are so successful at feature learning and compression. Here, we show that deep learning is intimately related to one of the most important and successful techniques in theoretical physics, the renormalization group (RG). RG is an iterative coarse-graining scheme that allows for the extraction of relevant features (i.e. operators) as a physical system is examined at different length scales. We construct an exact mapping from the variational renormalization group, first introduced by Kadanoff, and deep learning architectures based on Restricted Boltzmann Machines (RBMs). We illustrate these ideas using the nearest-neighbor Ising Model in one and two-dimensions. Our results suggests that deep learning algorithms may be employing a generalized RG-like scheme to learn relevant features from data.
Paul N

Have We Been Interpreting Quantum Mechanics Wrong This Whole Time? - 6 views

  •  
    "The experiments involve an oil droplet that bounces along the surface of a liquid. The droplet gently sloshes the liquid with every bounce. At the same time, ripples from past bounces affect its course. The droplet's interaction with its own ripples, which form what's known as a pilot wave, causes it to exhibit behaviors previously thought to be peculiar to elementary particles - including behaviors seen as evidence that these particles are spread through space like waves, without any specific location, until they are measured." Pilot-wave theory reresurrected. Maybe something for the next "fundamental" :P physics RF?
  •  
    And for the next 'Experimental Physics Stagiaire' position why not try to do "Unpredictable Tunneling of a Classical Wave-Particle Association" http://stilton.tnw.utwente.nl/people/eddi/Papers/PhysRevLett_TUNNEL.pdf, there are some rumors online that the results of Yves Couder Experiments can be reproduced with simple DIY vibrating tables! It is very funny to see the videos of the MIT's replication of this experiment (with lightening legends for those who are uncomfortable with the concepts involved https://www.youtube.com/watch?v=YF5iHQMjcsM)
Thijs Versloot

Octopus robot makes waves with ultra-fast propulsion - 2 views

  •  
    Technology/Robotics Scientists have developed an octopus-like robot, which can zoom through water with ultra-fast propulsion and acceleration never before seen in man-made underwater vehicles. Most fast aquatic animals are sleek and slender to help them move easily through the water but cephalopods, such as the octopus, are capable of high-speed escapes by filling their bodies with water and then quickly expelling it to dart away.
jcunha

Nature Optics: Super vision - 6 views

  •  
    Taking images through opaque, light-scattering layers is a vital capability and essential diagnostic tool in many applications. The research group of Prof. Mosk of U. Twente have started doing experiments shooting optical lasers into opaque materials in 2007, and for surprise of everyone, it turn out the light intensity after the opaque material in their experiments was orders of magnitude bigger than expected. Following these results they succeeded in taking non-invasive sharp pictures of objects hidden behind a screen of opaqueness, the so referred Super Vision in this Nature overview article.
  •  
    very nice!!!
jcunha

Oculus Rift users to see Moon live through robot - 2 views

  •  
    A group from Carnegie Mellon wants to send a robot to the Moon to beam live pictures of the Moon to Oculus Rift headset users, reported technology reporter Jane Wakefield of the BBC. Andy the robot is intended to swing into action as a robot on a mission to transform education about space.
annaheffernan

Acoustic topological insulator could hide submarines - 2 views

  •  
    Researchers have proposed a new "acoustic topological insulator" that could help alleviate sound scattering problems by transmitting sound in certain directions without any backscattering.
  •  
    If I understood correctly the triangular structure would channel the incident sound wave to a unique direction between two options, according to the rotation direction of the cylinders included in its mesh. So, one (possibly two) directions left to detect the hypothetical submarines? Very interesting though, I hope no oceanographers take measurements simultaneously to the signals as climate models will get even more wrong...!
johannessimon81

This incredible electron micrograph shows light as both a particle and a wave - 6 views

  •  
    So basically we can photograph light now. Not just detect photons but photograph LIGHT WAVES. Really clever setup BTW.
jcunha

Holographic acoustic elements for manipulation of levitated objects - 0 views

  •  
    Cool scientific and technical feat in engineering a tractor beam. See the explanation video here http://www.nature.com/ncomms/2015/151027/ncomms9661/extref/ncomms9661-s3.mov and the thing working in real time here http://www.nature.com/ncomms/2015/151027/ncomms9661/extref/ncomms9661-s2.mov
aborgg

Watch Uranium Emit Radiation - 2 views

  •  
    You've heard of the catastrophic effects of radiation on environments, animals and humans. A seemingly silent and invisible destroyer, radiation can make whole cities inhabitable for hundreds of years. But have you ever wondered what radiation actually looks like? There may be one image that jumps to mind. We saw the same detector setup in the room opposite to ours during the Open Day! Using uranium is just cooler. :)
Nina Nadine Ridder

To save on weight, a detour to the moon is the best route to Mars - 1 views

  •  
    More arguments for a lunar base? "They found the most mass-efficient path involves launching a crew from Earth with just enough fuel to get into orbit around the Earth. A fuel-producing plant on the surface of the moon would then launch tankers of fuel into space, where they would enter gravitational orbit. The tankers would eventually be picked up by the Mars-bound crew, which would then head to a nearby fueling station to gas up before ultimately heading to Mars."
  •  
    There was a paper with a very similar concept (reaching Mars via DRO) at the AAS meeting in January by Conte et al. First, the total Delta V required for a trip Earth -> LLO -> MLO is higher than Earth -> MLO. The trick is that Earth -> LLO requires less Delta V than Earth -> MLO and hence less mass has to be carried along *from Earth*. Essentially what both approaches have in common is that they say "if there's a free gas station orbiting the moon, it's cheaper to fly empty and fill up there on the way". The AAS paper actually does a decent job at estimating the "real" cost by also including estimates of the cost of a lunar base. https://pure.strath.ac.uk/portal/files/44275737/Conte_etal_AAS2015_Earth_Mars_transfers_through_Moon_distant_retrograde_orbit.pdf
« First ‹ Previous 721 - 740 of 822 Next › Last »
Showing 20 items per page