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Luís F. Simões

Wind Power Without the Blades: Big Pics : Discovery News - 4 views

news.discovery.com/...-power-without-the-blades.html

NRG wind energy biomimicry

shared by Luís F. Simões on 19 Sep 11 - No Cached
  • The carbon-fiber stalks, reinforced with resin, are about a foot wide at the base tapering to about 2 inches at the top. Each stalk will contain alternating layers of electrodes and ceramic discs made from piezoelectric material, which generates a current when put under pressure. In the case of the stalks, the discs will compress as they sway in the wind, creating a charge.
  • Based on rough estimates, said Núñez-Ameni the output would be comparable to that of a conventional wind farm covering the same area
  • After completion, a Windstalk should be able to produce as much electricity as a single wind turbine, with the advantage that output could be increased with a denser array of stalks. Density is not possible with conventional turbines, which need to be spaced about three times the rotor's diameter in order to avoid air turbulence. But Windstalks work on chaos and turbulence so they can be installed much closer together, said Núñez-Ameni.
  • ...1 more annotation...
  • Núñez-Ameni also reports that the firm is currently working on taking the Windstalk idea underwater. Called Wavestalk, the whole system would be inverted to harness energy from the flow of ocean currents and waves.
  • Luís F. Simões on 19 Sep 11
     
    additional information: http://atelierdna.com/?p=144
  • LeopoldS on 24 Sep 11
     
    isn't this a bit of a contradiction: on the one hand: "Based on rough estimates, said Núñez-Ameni the output would be comparable to that of a conventional wind farm covering the same area" and on the other: "After completion, a Windstalk should be able to produce as much electricity as a single wind turbine, with the advantage that output could be increased with a denser array of stalks. Density is not possible with conventional turbines, which need to be spaced about three times the rotor's diameter in order to avoid air turbulence. " still, very interesting concept!
pacome delva

Researchers Use Radio Waves to "See" Through Walls -- Berardelli 2009 (1015): 2 -- Scie... - 0 views

sciencenow.sciencemag.org/...2

technology radio tracking

shared by pacome delva on 19 Oct 09 - Cached
  • Researchers have discovered that an array of radio transceivers--devices that send and receive signals--can track people's movements behind walls. Possible uses include detecting people trapped in burning buildings, controlling lighting or heating and cooling systems as people enter or exit rooms, and spotting burglars or enemy soldiers.
LeopoldS

Tilera Corporation - 2 views

tilera.com/...press_release_091026.php

INF gadget computing

shared by LeopoldS on 26 Oct 09 - Cached
  • LeopoldS on 26 Oct 09
     
    who wants 100 cores ... future of PAGMO?
  • ...2 more comments...
  • Francesco Biscani on 27 Oct 09
     
    Well nVidia provides 10.000 "cores" in a single rack on thei Teslas...
  • LeopoldS on 27 Oct 09
     
    remember that you were recommending its purchase already some time ago ... still strong reasons to do so?
  • Francesco Biscani on 27 Oct 09
     
    The problem with this flurry of activity today regarding multicore architectures is that it is really unclear which one will be the winner in the long run. Never understimate the power of inertia, especially in the software industry (after all, people are still programming in COBOL and Fortran today). For instance, NVIDIA gives you the Teslas with 10000 cores, but then you have to rewrite extensive parts of your code in order to take advantage of this. Is this an investment worth undertaking? Difficult to say, it would certainly be if the whole software world moves into that direction (which is not happening - yet?). But then you have other approaches coming out, suche as the Cell processor by IBM (the one on the PS3) which has really impressive floating point performance and, of course, a completely different programming model. The nice thing about this Tilera processor seems to be that it is a general-purpose processor, which may not require extensive re-engineering of existing code (but I'm really hypothesizing, since the thechincal details are not very abundant on their website).
  • Ma Ru on 27 Oct 09
     
    Moreover PaGMO computation model is more towards systems with distributed memory, and not with shared memory (i.e. multi-core). In the latter, at certain point the memory access becomes the bottleneck.
Francesco Biscani

Why three buses come at once, and how to avoid it - physics-math - 29 October 2009 - Ne... - 4 views

www.newscientist.com/...-once-and-how-to-avoid-it.html

shared by Francesco Biscani on 29 Oct 09 - Cached
  • Now systems complexity researchers Carlos Gershenson and Luis Pineda of the National Autonomous University of Mexico have devised a mathematical model that shows how the problem might be prevented
  • Francesco Biscani on 29 Oct 09
     
    This is from Carlos, the guy who gave a science coffee talk a couple of months ago.
Juxi Leitner

Martian Projects Shall Use Nuclear Energy - 0 views

www.marsdaily.com/...ll_Use_Nuclear_Energy_999.html

technology nrg nuclear propulsion

shared by Juxi Leitner on 02 Nov 09 - Cached
  • Since current rocket technologies are not sufficient for the future exploration of Mars and the whole Solar system, and since no alternative energy resources have been found as of now, the only possible way to implement those projects would be by using nuclear energy, Lopota said at an academic conference on aerospace.
  • LeopoldS on 04 Nov 09
     
    blablabla
Francesco Biscani

Ion engine could one day power 39-day trips to Mars - space - 22 July 2009 - New Scientist - 0 views

www.newscientist.com/...power-39day-trips-to-mars.html

MAD vasimir nrg

shared by Francesco Biscani on 22 Jul 09 - Cached
  • Joris _ on 24 Jul 09
     
    As I mentioned it into my thesis, this engine bridges the gap between chemical and low-thrust propulsion systems. To be more specific: Isp should vary between 1000 and 30000s, and the thrust amplitude should reach up to 1200 N. It is interesting to see that the concept is actually moving forward ...
LeopoldS

A new angle on clinging in geckos: incline, not substrate, triggers the deployment of t... - 0 views

rspb.royalsocietypublishing.org/...rspb.2009.0946.abstract

BIO biomimetics NAN

shared by LeopoldS on 07 Aug 09 - Cached
  • LeopoldS on 07 Aug 09
     
    Tobias - have a look at this one ... am surprised to see this "new" paper since thought to remember that in our study they presented something quite similar ....
pacome delva

Phantom menace to dark matter theory - space - 08 July 2009 - New Scientist - 0 views

www.newscientist.com/...ace-to-dark-matter-theory.html

phy mond gravitation

shared by pacome delva on 05 Aug 09 - Cached
  • If MOND exists, it will appear as if there is an anomalous, "phantom" mass in that region, exerting a gravitational force on the bodies in our solar system.
  • According to Milgrom, this force should cause the orbits of the planets to precess - that is, their elliptical orbits around the sun should slowly change their orientation, over time tracing out a pattern like the petals of a flower.
LeopoldS

NASA - Climate Simulation Computer Becomes More Powerful - 0 views

www.nasa.gov/...climate_computing.html

climate modelling Earth System Sciences

shared by LeopoldS on 28 Aug 09 - Cached
  • LeopoldS on 28 Aug 09
     
    just to make Nina and Friederike envious ...
Juxi Leitner

Robots get smarter by asking for help - tech - 17 September 2009 - New Scientist - 0 views

www.newscientist.com/...marter-by-asking-for-help.html

robotics crowdsourcing AI

shared by Juxi Leitner on 21 Sep 09 - Cached
  • The system uses Amazon's Mechanical Turk, an online marketplace which pairs up workers with employers that have simple tasks they need completing. The robot takes a photo of the object it doesn't recognise and sends it to Mechanical Turk.
Joris _

Ion trap quantum computing - 0 views

www.physorg.com/news161348276.html

shared by Joris _ on 14 May 09 - Cached
  • One of the most important considerations in quantum computing is the fact that quantum computing scales polynomially, rather than exponentially, as classical computing does
  • his process would allow us to take problems of great complexity and still solve them on a humanly possible timescale. This could provide the key to modeling complex systems - especially perhaps in biology - that we can’t solve now. This would be a tremendous advantage over classical computing.
  • Joris _ on 14 May 09
     
    a follow-up question: Can quantum computer be efficient for global optimisation ?
Dario Izzo

ESA Portal - ESA to launch two large observatories to look deep into space and time - 0 views

www.esa.int/...SEMEOSZXDUF_index_0.html

shared by Dario Izzo on 11 May 09 - Cached
  • s in space, in a part of the electromagnetic spectrum still mostly unexplored. Planck is a telescope that will map the fossil light of the Universe - light from the Big Bang
    • Dario Izzo
      Dario Izzo on 11 May 09
       
      try izzo
    • LeopoldS
      LeopoldS on 12 May 09
       
      strange entries here ? just testing the system???
  • jmlloren on 11 May 09
     
    Amazing "to look deep into space and time". What a nice pun!
  • Ma Ru on 12 May 09
     
    Coooool!
nikolas smyrlakis

Should NIAC be Revived? | NASA Watch - 0 views

www.nasawatch.com/...should_niac_be.html

niac advanced concepts nasa space

shared by nikolas smyrlakis on 12 Jun 09 - Cached
  • $4 million annual budge
    • nikolas smyrlakis
      nikolas smyrlakis on 12 Jun 09
       
      To my knowledge (readers correct me if I'm wrong) no where else within NASA do people get paid to just think very long range ideas. My question: does such a group belong in NASA and should it or something like it be revived? And if you think so, what should its highest priority be? Propulsion? Artificial gravity systems? Space Elevator?
  • nikolas smyrlakis on 12 Jun 09
     
    about the advanced concepts institute of NASA. Found via twitter
Joris _

Report: Planets will collide in 5 billion years - 0 views

www.sfgate.com/...article.cgi

astrodynamic space planets

shared by Joris _ on 11 Jun 09 - No Cached
  • Mercury, Mars, Venus and Earth to smash into each other, either one at a time or all at once
  • by the end of that same 5 billion years the sun will have burned up its hydrogen and in a cooler state will inflate itself
  • the great "gas giants" of the outer solar system - Jupiter, Saturn, Uranus and Neptune - are extremely stable in their orbits, so they could remain where they are for a much longer time
  • Joris _ on 11 Jun 09
     
    Interesting, but obviously something is wrong. How the big giants can remain still if the inner planets and the sun vanish at the same time !
ESA ACT

iCUBE Network Solutions | Online Operating System | OOS - 0 views

icube.at/oos.jsp

internet computing

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    would be nice to have an open source equivalent ...
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