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Athanasia Nikolaou

Aquifer discovered enclosed in Greenland ice sheet - 2 views

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    As the researchers desribe, the aquifer found is defined as a basin filled with aged snow (firn) that was saturated with water trapped within its porous structure. More ice cores to study! But in that case the time sequence along the length of the cores - to be extracted- would not be monotonic, as was the case in the dry cores we analysed. That's because there is constant input of surface water percolating through the ice-sheet to reach the depth of the aquifer, and since it flows downward its temperature could affect its partial pressure => its vertical position along the core
Tom Gheysens

First step towards 'programmable materials': Sheet metal that never rattles -- ScienceD... - 2 views

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    Very nice new concept for active vibration damping. I think this has huge potential for space applications
aborgg

Electron waves refract negatively - 1 views

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    Waves of electrons have been bent backward in a sheet of graphene, allowing physicists to focus electrons the way a lens focuses light. Electrons coursing through a sheet of carbon atoms exhibited negative refraction, bending at angles not seen in nature. By exploiting this unusual bending, the researchers created a lenslike device to focus the electrons to a tiny point. The new technique could help physicists learn how to manipulate electrons in the tight confines of miniaturized electronic devices, where the particles often behave like waves.
ESA ACT

Look, no wires! - 0 views

shared by ESA ACT on 24 Apr 09 - Cached
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    thin flexible sheets that can transmit electrical energy to nearby devices without the need for direct electrical contact.
jaihobah

Exposed subsurface ice sheets in the Martian mid-latitudes - 1 views

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    Some locations on Mars are known to have water ice just below the surface, but how much has remained unclear. Dundas et al. used data from two orbiting spacecraft to examine eight locations where erosion has occurred. This revealed cliffs composed mostly of water ice, which is slowly sublimating as it is exposed to the atmosphere. The ice sheets extend from just below the surface to a depth of 100 meters or more and appear to contain distinct layers, which could preserve a record of Mars' past climate. They might even be a useful source of water for future human exploration of the red planet.
aborgg

Swarm of Origami Robots Can Self Assemble Out of a Single Sheet - 5 views

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    In case you are interested in Martin's past project, this article covers his master thesis. Potential for space? One of the biggest challenges with swarms of robots is manufacturing and deploying the swarm itself. Even if the robots are relatively small and relatively simple, you're still dealing with a whole bunch of them, and every step in building the robots or letting them loose is multiplied over the entire number of bots in the swarm.
Thijs Versloot

Worlds first 3D acoustic cloaking device - 1 views

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    Using little more than a few perforated sheets of plastic and a staggering amount of number crunching, Duke engineers have demonstrated the world's first three-dimensional acoustic cloak. The new device reroutes sound waves to create the impression that both the cloak and anything beneath it are not there.
Guido de Croon

Robot dragonfly DelFly Explorer avoids obstacles by itself - 1 views

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    TU Delft researchers have developed the DelFly Explorer, the world's first Micro Air Vehicle with flapping wings that can avoid obstacles by itself. The uniqueness of this achievement lies in the DelFly Explorer's very low weight (20 grams, i.e. a few sheets of paper), and this opens up new possible applications for both smaller and larger MAVs.
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    I'm kinda curious what you used for processing power there. Is that a DSP?
Juxi Leitner

Pentagon's Shape-Shifting Bot Folds Into Boat, Plane | Danger Room | Wired.com - 0 views

  • Darpa-backed electrical engineers at the two schools released the stunning results: a shape-shifting sheet of rigid tiles and elastomer joints that can fold itself into a little plane or a boat on demand.
  • In Darpa’s dreams, this work will eventually lead to everything from morphing aircraft to self-styling uniforms to a “universal spare part.”
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    haha! is this a joke...?
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    well i guess the news headline is a bit too much trying to be attractive :)
santecarloni

[1010.3437] Dynamical mass generation via space compactification in graphene - 0 views

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    Is it really possible?
  • ...2 more comments...
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    The affiliation is Saudi Arabia and Marocco, not countries famous for their contributions to physics... But nonetheless, yes this is possible, to me it even looks very plausible! But you should know that the term "mass" in this context just means a certain parameter in the dynamical equations and only has a loose relation to what we usually call "mass" in the macroscopic world.
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    ok - admit that I only read the abstract but to me the seems to be a little bit of magic happening ... even if "mass is only a certain parameter in the dynamical equations" ... I assume it still bears some "heavy" consequences in terms of their speed, interactions etc, no? and assuming that you gradually bend such a structure from a 2D to a 1D one ... does it "gain" mass gradually? all very strange to me ...
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    I think the problem is in the boundary conditions... the issue is that if you use and infinite sheet or a cylinder in the equations you always take cyclic boundary condition. If this guys are right then the mass of the quasi-particles in a crystal depends on its topology... this is a major thing...
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    BINGO!! It's almost like good ol' Kaluza-Klein...
pacome delva

A Battery Made With Paper - 0 views

  • Researchers are reporting that they've made batteries and other energy-storage devices by printing layers of carbon nanotube–based ink atop standard photocopy paper. The result is a highly conductive sheet that can carry a charge and be easily incorporated into a flexible battery. Because of paper's low cost, that could help lower the price of batteries used in electric vehicles, wind farms, and other renewable sources.
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    can we use it for space :-) ?
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