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Luís F. Simões

Stochastic Pattern Recognition Dramatically Outperforms Conventional Techniques - Techn... - 2 views

  • A stochastic computer, designed to help an autonomous vehicle navigate, outperforms a conventional computer by three orders of magnitude, say computer scientists
  • These guys have applied stochastic computing to the process of pattern recognition. The problem here is to compare an input signal with a reference signal to determine whether they match.   In the real world, of course, input signals are always noisy so a system that can cope with noise has an obvious advantage.  Canals and co use their technique to help an autonomous vehicle navigate its way through a simple environment for which it has an internal map. For this task, it has to measure the distance to the walls around it and work out where it is on the map. It then computes a trajectory taking it to its destination.
  • Although the idea of stochastic computing has been around for half a century, attempts to exploit have only just begun. Clearly there's much work to be done. And since one line of thought is that the brain might be a stochastic computer, at least in part, there could be exciting times ahead.
  • ...1 more annotation...
  • Ref: arxiv.org/abs/1202.4495: Stochastic-Based Pattern Recognition Analysis
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    hey! This is essentially the Probabilistic Computing Ariadna
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    The link is there but my understanding of our purpose is different than what I understood from the abstract. In any case,the authors are from Palma de Mallorca, Balears, Spain "somebody" should somehow make them aware of the Ariadna study ... E.g somebody no longer in the team :-)
ESA ACT

PlagiarismDetect.com | Free Online Plagiarism Detection System - 0 views

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    If you get suspicious text you can have an automated check. However, I suggest to remove any references chapter since they boost the amount of hits. My last Ariadna report has a plagiarism rate of 8.7%. Anyone higher?
LeopoldS

UCR Today: Flight Patterns Reveal How Mosquitoes Find Hosts to Transmit Deadly Diseases - 0 views

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    since fighting them desperately here in Jerusalem ... and relevant to our ariadna study (even if a bit late - Luke?)
LeopoldS

Does the Feigel effect violate the first law? - 2 views

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    interestingly also with a reference to the ariadna study of Andreas ...
pandomilla

Not a scratch - 7 views

shared by pandomilla on 12 Apr 12 - No Cached
LeopoldS liked it
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    I hate scorpions, but this could be a nice subject for a future Ariadna study! This north African desert scorpion, doesn't dig burrows to protect itself from the sand-laden wind (as the other scorpions do). When the sand whips by at speeds that would strip paint away from steel, the scorpion is able to scurry off without apparent damage.
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    Nice research, though they have done almost all the work that we could do in an Ariadna, didnt they? "To check, they took further photographs. In particular, they used a laser scanning system to make a three-dimensional map of the armour and then plugged the result into a computer program that blasted the virtual armour with virtual sand grains at various angles of attack. This process revealed that the granules were disturbing the air flow near the skeleton's surface in ways that appeared to be reducing the erosion rate. Their model suggested that if scorpion exoskeletons were smooth, they would experience almost twice the erosion rate that they actually do. Having tried things out in a computer, the team then tried them for real. They placed samples of steel in a wind tunnel and fired grains of sand at them using compressed air. One piece of steel was smooth, but the others had grooves of different heights, widths and separations, inspired by scorpion exoskeleton, etched onto their surfaces. Each sample was exposed to the lab-generated sandstorm for five minutes and then weighed to find out how badly it had been eroded. The upshot was that the pattern most resembling scorpion armour-with grooves that were 2mm apart, 5mm wide and 4mm high-proved best able to withstand the assault. Though not as good as the computer model suggested real scorpion geometry is, such grooving nevertheless cut erosion by a fifth, compared with a smooth steel surface. The lesson for aircraft makers, Dr Han suggests, is that a little surface irregularity might help to prolong the active lives of planes and helicopters, as well as those of scorpions."
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    What bugs me (pardon the pun) is that the dimensions of the pattern they used were scaled up by many orders of magnitude, while "grains of sand" with which the surface was bombarded apparently were not... Not being a specialist in the field, I would nevertheless expect that the size of the surface pattern *in relation to* to size of particles used for bombarding would be crucial.
Dario Izzo

A little bit of ACT and NVIDIA Goes to the Moon with CUDA and Tegra - 3 views

shared by Dario Izzo on 08 Dec 11 - No Cached
LeopoldS liked it
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    The famous Mars Rover Simulator was a piece of the Evolution in Robotic Island Ariadna!!!!! But again, its only an algorithm :) whats new?
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    Go Plymouth!
jmlloren

IBM discovers its inner Kickstarter via enterprise crowdfunding - Network World - 2 views

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    Internal crowdfunding for ESA? for Ariadna? Perhaps I'm late, but sounds feasible.
Juxi Leitner

Space Debris Removal - 1 views

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    ElectroDynamic Debris Eliminator ... seems similar to the Ariadna proposal if I remember correctly
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    It was presented during the second day of the SpaceTech workshop. As far as I understood (which I am not sure!) the double tether is spinning ... isn't a bit crazy!
pacome delva

Galaxy study backs general relativity - 1 views

  • The observed ratio, dubbed EG, has a value of 0.39 ± 0.06. This agrees with general relativity, which predicts a value of 0.4. Crucially, the measurement rules out the tensor, vector scalar (TeVeS) model of modified gravity, which has an EG of 0.22 and does not need dark matter. The result does not, however, preclude the f(R) theory – which is more similar to general relativity and has EG values in the 0.328–0.365 range.
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    mmm, i wonder if this study takes into account the non linearities studied in the Ariadna on galaxies...
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    Luzi: any comment?
Christos Ampatzis

iphone application FP7 - Let's embrace space - 1 views

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    pretty cool - Couldnt the ACT do sth similar with the ARIADNA projects?!
ESA ACT

Direct-Current Nanogenerator Driven by Ultrasonic Waves -- Wang et al ... - 0 views

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    for Mars? should we compare this to solar panels? or hybrid of the two? internal or possible ariadna?
ESA ACT

OpenID » Blog Archive » OpenID 2.0…Final(ly)! - 0 views

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    we should use this ..... for ariadna ...
ESA ACT

New 'Metamaterial' Brings Scientists Closer Than Ever to a Cloaking Device - 0 views

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    another one ... relevant for Ariadna?
LeopoldS

Bridging the Bio-Electronic Divide - 1 views

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    new darpa project ... who still remembers our Ariadna study from 2005 ....?
Luís F. Simões

Zeitgeist 2012 - Google - 2 views

  • 1.2 trillion searches. 146 languages. What did the world search for in 2012?
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    this is a gold mine :D Portugal, a bankrupt country in crisis where the Most Searched How to... is "Como emagrecer" (how to lose weight?). Netherlands, where the Most Searched How to... is "Hoe overleef ik" (how do I survive?) UK where the most Trending What is... is "What is love?" and Italians... please explain how come the top Trending How to... are 1. Come fare Sesso 2. Come fare un Clistere !?!? Respect for Austria though, where the top trending What is... are: 1. Was ist ACTA 2. Was ist SOPA any other interesting finds?
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    From Ghana "What is...?": What is a Constitution What is Government [edit] Some top Science searches in the US: Hemorrhoid, Pregnancy Syndroms. Any potential for Ariadna? [edit] ... and finally, for the sake of my shield, top search from Poland in the Music category
Nicholas Lan

An extensive and autonomous deep space navigation system using radio pulsars :: TU Delf... - 4 views

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    Interesting. these guys are apparently gonna try developing pulsar navigation. They propose to solve the low apparent brightness problem using relatively complex signal processing and filtering to limit the antenna size etc. The say they've already had some promising results using ground based data. worth a science coffee perhaps?
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    Absolutely. Sante can you get in contact with them?
pandomilla

Uncoiling the cucumber's enigma - 1 views

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    Captivated by a strange coiling behavior in the grasping tendrils of the cucumber plant, researchers at Harvard University have characterized a new type of spring that is soft when pulled gently and stiff when pulled strongly. Instead of unwinding to a flat ribbon under stress, as an untwisted coil normally would, the cucumber's tendrils actually coil further.
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    ...interesting discovery that can add something to my ongoing Ariadna...
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    And here you have the paper published today on Science http://www.sciencemag.org/content/337/6098/1087.full
santecarloni

Invisibility cloak gives sound performance - physicsworld.com - 2 views

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    "...scientists in Germany have built a device that can effectively make objects invisible to sound waves. The performance of the acoustic "invisibility cloak" exceeds that of existing electromagnetic devices and could open up new ways of manipulating waves, including the development of shields against seismic waves."
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    shit.... they are a few months ahead of us it seems ... :-( what is the impact on our ariadna??
dejanpetkow

Camilla's ARIADNA study in German media - 5 views

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    I am a bit surprised by the number of critical comments to this article there ..
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    But the comments are not critical, it's just bullshitting.
Christos Ampatzis

Rapid Inversion: Running Animals and Robots Swing like a Pendulum under Ledges - 3 views

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    Cool - reminds me of the cockroach ARIADNA study see the videos in supplementary material
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