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Nature's designs inspire research into new light-based technologies - 2 views

spie.org/x110126.xml
shared by Isabelle Dicaire on 19 Sep 14 - No Cached
LeopoldS liked it
  • Isabelle Dicaire on 19 Sep 14
     
    Several recent papers on biomimetics and photonics, including works on structural colours, radiation shielding, spiders and more.
  • LeopoldS on 20 Sep 14
     
    including one for Tom: Structural color and its interaction with other color-producing elements: perspectives from spiders Bor-Kai Hsiung ; Todd A. Blackledge ; Matthew D. Shawkey [+] Author Affiliations Proc. SPIE 9187, The Nature of Light: Light in Nature V, 91870B (September 8, 2014); doi:10.1117/12.2060831
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Training and operation of an integrated neural network based on memristors - 0 views

www.nature.com/...nature14441.html NAN science technology memristor AI neuromorphic
shared by jcunha on 07 May 15 - No Cached
LeopoldS liked it
  • jcunha on 07 May 15
     
    Almost in time for the workshop last week! This new Nature paper (e-mail me for full paper) claims training and usage of neural network implemented with metal-oxide memristors, without selector CMOS. They used it to implement a delta-rule algorithm for classification of 3x3 pixel black and white letters. Very impressive work!!!!
  • jcunha on 07 May 15
     
    For those not that much into the topic, see the Nature's News and View section www.nature.com/nature/journal/v521/n7550/full/521037a.html?WT.ec_id=NATURE-20150507 where they feature this article.
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Reconfigurable Electromagnetics Through Metamaterials-A Review - 5 views

ieeexplore.ieee.org/...abs_all.jsp metamaterials
shared by LeopoldS on 26 May 15 - No Cached
  • LeopoldS on 26 May 15
     
    Interesting overview paper by Massa from Trient on reconfigurable metamaterials … makes me wonder if it is time for us to look closer into it or already too late …
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Neuronal Networks: Computers paint like van Gogh - 1 views

www.spiegel.de/...maelde-aussehen-a-1051084.html AI
shared by Alexander Wittig on 03 Sep 15 - No Cached
  • Alexander Wittig on 03 Sep 15
     
    A neuronal network trained to paint the scene of a given photograph in the style of Kandinsky, van Gogh, or Munch. Their results look quite impressive. Unfortunately the article is in German, but the English paper (with plenty of pictures) is here: http://arxiv.org/pdf/1508.06576v2.pdf Malen wie Kandinsky, wie van Gogh, wie Munch nur auf Basis einer Fotovorlage? Natürlich gibt es begabte Kunstfälscher, die das können. Jetzt aber gelingt es auch Computern, und zwar auf höchst eindrucksvolle Weise. Drei Forscher von der Universität Tübingen haben es geschafft, einem sogenannten künstlichen neuronalen Netzwerk das Malen beizubringen.
  • Luís F. Simões on 03 Sep 15
     
    Impressive stuff indeed. Paper came out one week ago. Multiple independent implementations have popped out since then: * https://github.com/Lasagne/Recipes/blob/master/examples/styletransfer/Art%20Style%20Transfer.ipynb * https://github.com/jcjohnson/neural-style * https://github.com/kaishengtai/neuralart
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New theory to lead to radiationless revolution - 3 views

www.anu.edu.au/...ad-to-radiationless-revolution technology science
shared by Thijs Versloot on 01 Sep 15 - No Cached
  • Thijs Versloot on 01 Sep 15
     
    Physicists have found a radical new way to confine electromagnetic energy without it leaking away, akin to throwing a pebble into a pond with no splash. The theory could have broad ranging applications from explaining dark matter to combating energy losses in future technologies.
  • johannessimon81 on 01 Sep 15
     
    I think (but am not sure) that is related to a topic that Dirk Bouwmeester's group at Leiden University works on for a while now: "Linked and knotted beams of light" http://irvinelab.uchicago.edu/papers/nphys1056.pdf
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Where Life Meets Light: Bio-Inspired Photonics - 0 views

www.osa-opn.org/...s_light_bio-inspired_photonics BIO biomimetics science FUN technology
shared by jcunha on 18 Jun 15 - No Cached
  • jcunha on 18 Jun 15
     
    Octopus and optoelectronics camouflage, light bugs and LEDs, or spider webs and touch screens, ... a whole cool bunch of biomimetic stuff
  • jcunha on 18 Jun 15
     
    See also the referred work "Light-extraction enhancement for light-emitting diodes: a firefly-inspired structure refined by the genetic algorithm" - quite cool! https://pure.fundp.ac.be/portal/files/11946897/paper89.pdf
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Command line tools for the Google Data APIs - 2 views

code.google.com/googlecl INF command line fun Web 2.0
shared by Ma Ru on 20 Jun 10 - Cached
  • Ma Ru on 20 Jun 10
     
    I'm sure Francesco will love it... perhaps of use for ACT's Google calendar/docs?
  • LeopoldS on 21 Jun 10
     
    is there an easy way (easy for Francesco I mean) to retrieve the citation number of papers in google scholar automatically (e.g. for act papers)?
  • Francesco Biscani on 13 Jul 10
     
    It seems like google scholar is not supported yet.
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The uncertainty principle in the presence of quantum memory : Abstract : Nature Physics - 0 views

www.nature.com/...nphys1734.html PHY science uncertainty
shared by LeopoldS on 26 Jul 10 - Cached
  • LeopoldS on 26 Jul 10
     
    can't read the full paper from here but this looks really interesting!! Pacome, Luzi I am sure you will like it ...
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The size of the proton : Nature : Nature Publishing Group - 0 views

www.nature.com/...nature09250.html PHY science
shared by LeopoldS on 03 Aug 10 - Cached
  • LeopoldS on 03 Aug 10
     
    very nice nature paper ... the title says it all ...
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Access : Experimental free-space quantum teleportation : Nature Photonics - 4 views

www.nature.com/...nphoton.2010.87.html technology phy space science
shared by LeopoldS on 07 Sep 10 - No Cached
  • LeopoldS on 07 Sep 10
     
    interesting chinese paper ...
  • duncan barker on 07 Sep 10
     
    beam me up scottie!!
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Space Colonists Could Use Bacteria to Mine Minerals on Mars and the Moon - 3 views

www.scientificamerican.com/article.cfm bacteria bio mining colonization food oxygen
shared by Luís F. Simões on 10 Sep 10 - No Cached
  • Luís F. Simões on 10 Sep 10
     
    Link to the paper that is the subject of this article: Olsson-Francis, Karen and Cockell, Charles (2010). Use of cyanobacteria for in-situ resource use in space applications. Planetary And Space Science, 58(10), 1279-1285.http://dx.doi.org/10.1016/j.pss.2010.05.005
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Kitware Blog - VTK: an example on how to fix the crisis of scientific software - 2 views

www.kitware.com/67 open science inf
shared by Francesco Biscani on 08 Nov 10 - No Cached
  • Francesco Biscani on 08 Nov 10
     
    A nice blog post about a recent Nature paper highlighting the problems of scientific software.
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[1012.1194] Does an atom interferometer test the gravitational redshift at the Compton ... - 0 views

fr.arxiv.org/1012.1194 phy atom_interferometry general_relativity
shared by pacome delva on 07 Dec 10 - No Cached
  • pacome delva on 07 Dec 10
     
    Here is a probably definite answer to the strong polemics around the test of gravitational redshift with atom interferometers, which would be far better than the one done by ACES/PHARAO. Read the abstract it's very ACT like, Luzi should like it :) The original Nature paper is the one of Muller, Peters and Chu (the nobel and secretary of energy in the US): http://www.nature.com/nature/journal/v463/n7283/full/nature08776.html
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Japan probe overshoots Venus, heads toward sun - 0 views

www.washingtonpost.com/...AR2010120701077.html MAD venus robust
shared by Joris _ on 08 Dec 10 - No Cached
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  • A Japanese probe to Venus failed to reach orbit Wednesday and was captured by the sun's gravitational pull
  • Akatsuki's engines did not fire long enough to attain the proper orbiting position
  • may be able to try again when it passes by Venus six years from now.
  • Joris _ on 08 Dec 10
     
    The usefulness of having a robust trajectory :) ... They have to wait 6 more years for another date with Venus ...
  • ...2 more comments...
  • Joris _ on 09 Dec 10
  • LeopoldS on 11 Dec 10
     
    I agree in general but just out of the stomach: is there really an optimised trajectory that would be able to avoid this kind of scenarios when main thrusters don't perform properly? Wouldn't you in any case end up in a sun-orbiting trajectory and have to come back after years??
  • Joris _ on 11 Dec 10
     
    "optimised trajectory" of course not, robust definitely! It was the subject of my paper presented at the AAS (the one in San Diego) "Designing robust interplanetary trajectories subject to one temporary engine failure". The problem here is that they do not have enough fuel for a correction maneuver that would allow to come back to Venus earlier, and break for a VOI. A robust scenario could have alloted the best amount of fuel and time to be able to recover from almost all possible unplanned events. In the paper, I introduce some confidence regions such that I get the robust control for p% chance of mission success in case m% chance of problem with the propulsion system.
  • Dario Izzo on 12 Dec 10
     
    You should run your method on this scenario and see if you could get a trajectory with a shorter come back time using the same spacecraft.... would be a big selling point for a new trajectory design approach
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Socialism in soil? The importance of mycorrhizal fungal networks for facilitation in na... - 0 views

www3.interscience.wiley.com/...abstract BIO
shared by LeopoldS on 24 Dec 09 - No Cached
  • LeopoldS on 24 Dec 09
     
    see my comment before ... nice paper ...
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Arbuscular mycorrhizal fungi as support systems for seedling establishment in grassland... - 0 views

www3.interscience.wiley.com/...abstract BIO
shared by LeopoldS on 24 Dec 09 - No Cached
  • LeopoldS on 24 Dec 09
     
    we discussed this once - think with Tobias ... these very complex fungi in soils and their interaction with plants .... nice paper
  • Ma Ru on 25 Dec 09
     
    Fungi rule!!!
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A Battery Made With Paper - 0 views

sciencenow.sciencemag.org/...2 phy nrg nan carbon_nanotubes batteries
shared by pacome delva on 09 Dec 09 - Cached
LeopoldS liked it
  • 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.
  • LeopoldS on 13 Dec 09
     
    can we use it for space :-) ?
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The End Of Gravity As a Fundamental Force - 6 views

science.slashdot.org/...Gravity-As-a-Fundamental-Force phy
shared by Francesco Biscani on 11 Jan 10 - Cached
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  • Francesco Biscani on 11 Jan 10
     
    "At a symposium at the Dutch Spinoza-instituut on 8 December, 2009, string theorist Erik Verlinde introduced a theory that derives Newton's classical mechanics. In his theory, gravity exists because of a difference in concentration of information in the empty space between two masses and its surroundings. He does not consider gravity as fundamental, but as an emergent phenomenon that arises from a deeper microscropic reality. A relativistic extension of his argument leads directly to Einstein's equations."
  • ...8 more comments...
  • Dario Izzo on 12 Jan 10
     
    Diffcult for me to fully understand / believe in the holographic principle at macroscopical scales ... potentially it looks though as a revolutionary idea.....
  • pacome delva on 13 Jan 10
     
    never heard about it... seems interesting. At first sight it seems that it is based on fundamental principle that could lead to a new phenomenology, so that could be tested. Perhaps Luzi knows more about this ? Did we ever work on this concept ?
  • Luzi Bergamin on 13 Jan 10
     
    The paper is quite long and I don't have the time right now to read it in detail. Just a few comments: * We (ACT) definitely never did anything in this direction? But: is there a new phenomenology? I'm not sure, if the aim is just to get Einstein's theory as emergent theory, then GR should not change (or only change in extreme conditions.) * Emergent gravity is not new, also Erik admits that. The claim to have found a solution appears quite frequently, but most proposals actually are not emergent at all. At least, I have the impression that Erik is aware of the relevant steps to be performed. * It's very difficult to judge from a short glance at the paper, up to which point the claims are serious and where it just starts to be advertisments. Section 6 is pretty much a collection of self-praise. * Most importantly: I don't understand how exactly space and time should be emergent. I think it's not new to observe that space is related to special canonical variables in thermodynamics. If anybody can see anything "emergent" in the first paragraphs of section 3, then please explain me. For me, this is not emergent space, but space introduced with a "sledge hammer." Time anyway seems to be a precondition, else there is nothing like energy and nothing like dynamics. * Finally, holography appears to be a precondition, to my knowledge no proof exists that normal (non-supersymmetric, non-stringy, non-whatever) GR has a holographic dual.
  • Luzi Bergamin on 13 Jan 10
     
    Update: meanwhile I understood roughly what this should be about. It's well known that BH physics follow the laws of theormodynamics, suggesting the existence of underlying microstates. But if this is true, shouldn't the gravitational force then be emergent from these microstates in the same way as any theromdynamical effect is emergent from the behavior of its constituents (e.g. a gas)? If this can be prooven, then indeed gravity is emergent. Problem: one has to proof that *any* configuration in GR may be interpreted as thermodynamical, not just BHs. That's probably where holography comes into the play. To me this smells pretty much like N=4 SYM vs. QCD. The former is not QCD, but can be solved, so all stringy people study just that one and claim to learn something about QCD. Here, we look at holographic models, GR is not holographic, but who cares... Engineering problems...
  • LeopoldS on 13 Jan 10
     
    is there any experimental or observational evidence that points to this "solution"?
  • Luzi Bergamin on 13 Jan 10
     
    Are you joking??? :D
  • pacome delva on 14 Jan 10
     
    I was a bit fast to say it could be tested... apparently we don't even know a theory that is holographic, perhaps a string theory (see http://arxiv.org/abs/hep-th/9409089v2). So very far from any test...
  • LeopoldS on 14 Jan 10
     
    Luzi, I miss you!!!
  • Luzi Bergamin on 14 Jan 10
     
    Leo, do you mean you liked my comment on your question more than Pacome's? Well, the ACT has to evolve and fledge, so no bullshitting anymore, but serious and calculating answers... :-) Sorry Pacome, nothing against you!! I just LOVE this Diigo because it gives me the opportunity for a happy revival of my ACT mood.
  • pacome delva on 14 Jan 10
     
    haha, today would have been great to show your mood... we had a talk on the connection between mind and matter !!
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jse_13_2_dibble.pdf (application/pdf-Objekt) - 3 views

ip-208-109-118-161.ip.secureserver.net/...jse_13_2_dibble.pdf strage
shared by LeopoldS on 14 Jan 10 - No Cached
  • LeopoldS on 14 Jan 10
     
    the PH paper Martin was mentioning ...
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"Verschränkte" Gehirnzellen - science.ORF.at - 2 views

science.orf.at/1636355 bio neuroscience quantum
shared by Juxi Leitner on 18 Jan 10 - Cached
  • Juxi Leitner on 18 Jan 10
     
    Sorry for the German, but there is a link to the english paper as well: http://www.plosbiology.org/article/info%3Adoi%2F10.1371%2Fjournal.pbio.1000278 Following up on Martin's talk, I found that on the Austrian National Broadcaster website, well not really the top source for sound science news but anyway :)
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