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LeopoldS

Tilera Corporation - 2 views

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    who wants 100 cores ... future of PAGMO?
  • ...2 more comments...
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    Well nVidia provides 10.000 "cores" in a single rack on thei Teslas...
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    remember that you were recommending its purchase already some time ago ... still strong reasons to do so?
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    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).
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    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.
Joris _

DailyTech - NASA Releases iPhone App - 2 views

  • The U.S. space agency has worked more diligently the past few years to better interact with the public.
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    what about ESA?
  • ...3 more comments...
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    have already sent it as a suggestion to our com department ... btw: installed the app and its really well done!!
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    God no, why give more taxpayers' money to the shittiest, greediest and most closed company out there??
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    why "more" ... do they get any taxpayers money? answer to your question: because its the most efficient (and coolest) platform to convey your message to a larger audience with relatively little effort ... btw: just ordered a time capsule for home :-)
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    I said "more" because we already gave them money in the form of Sophia and Atlas :) If we want to be consistent in promoting "open" efforts (open innovation, open source, open governance, etc.) we should avoid Apple like the plague. They are far far worse than Microsoft in terms of closedness, secrecy, shady market practices and vendor lock-in. Just google a bit and you will find lots of example of their behaviour.
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    cant' really argue about the Apple practices, although I ve read some things. I think the NASA app is more like a news feed and nothing more. But that online crowdsourcing game we had in mind, now that would be cool in a mobile version - new mobiles also have accelerometers nowadays
Francesco Biscani

Asteroid blast reveals holes in Earth's defences - space - 26 October 2009 - New Scientist - 2 views

  • On 8 October an asteroid detonated high in the atmosphere above South Sulawesi, Indonesia, releasing about as much energy as 50,000 tons of TNT, according to a NASA estimate released on Friday. That's about three times more powerful than the atomic bomb that levelled Hiroshima, making it one of the largest asteroid explosions ever observed.
Francesco Biscani

Robot Armada Might Scale New Worlds - 1 views

  • We are departing from traditional approaches of a single robotic spacecraft with no redundancy that is Earth-commanded to one that allows for having multiple, expendable low-cost robots that can command themselves or other robots at various locations at the same time.
Francesco Biscani

Found: first 'skylight' on the moon - space - 22 October 2009 - New Scientist - 2 views

  • A deep hole on the moon that could open into a vast underground tunnel has been found for the first time. The discovery strengthens evidence for subsurface, lava-carved channels that could shield future human colonists from space radiation and other hazards.
pacome delva

Cutting Carbon Emissions, One Household at a Time -- Berardelli 2009 (1026): 1 -- Scien... - 1 views

  • By taking a few well-known, readily available measures, researchers argue, Americans could cut their emissions of the greenhouse gas carbon dioxide by as much as 7% over the next decade.
LeopoldS

YouTube - Rat Brain Robot - 0 views

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    a pity that they don't show the rat brain also ... anything published available would also be nice ...
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    Scary... I liked the "Each time the robot has behaved differently" part though :)
Friederike Sontag

Aerosols make methane more potent - 1 views

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    "climate policy-makers need to pay much more attention to restricting short-lived pollutants, such as methane, carbon monoxide, volatile organic compounds (VOCs) and aerosols. This could create significant changes in the local and global climate quite quickly, whereas the effects of efforts to reduce emissions of long-lived carbon dioxide will not be seen for many years."
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    interesting indeed ... but coming at the right time before copenhagn?
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    These conclusions come too late to have a real impact on decisions that will be taken in Copenhagen, I assume. But I think it is a hot topic as climate change 'solutions' that work QUICKLY are more and more needed!!
Juxi Leitner

Real-Life Cyborg Astrobiologists to Search for Signs of Life on Future Mars Missions - 0 views

  • EuroGeo team developed a wearable-computer platform for testing computer-vision exploration algorithms in real-time at geological or astrobiological field sites, focusing on the concept of "uncommon mapping"  in order to identify contrasting areas in an image of a planetary surface. Recently, the system was made more ergonomic and easy to use by porting the system into a phone-cam platform connected to a remote server.
  • a second computer-vision exploration algorithm using a  neural network in order to remember aspects of previous images and to perform novelty detection
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    well a bit misleading title...
pacome delva

Physics - Atoms in a lattice keep time - 0 views

  • If your wristwatch was as accurate as today’s atomic clocks, it would not gain or lose a second in 80 million years.
  • The NIST group traps and cools neutral 171Yb atoms and loads them into a one-dimensional lattice, so that about 30,000 atoms fill several hundred lattice sites.
  • Lemke et al. compare their optical lattice clock with the current standard atomic fountain clock and find that the accuracy of the Yb lattice clock potentially challenges the current standard.
Francesco Biscani

DIRECT - Wikipedia, the free encyclopedia - 0 views

  • DIRECT is a proposed alternative Shuttle-Derived Launch Vehicle architecture supporting NASA's Vision for Space Exploration, which would replace the space agency's planned Ares I and Ares V rockets with a family of launch vehicles named "Jupiter."
  • DIRECT is advocated by a group of space enthusiasts that asserts it represents a broader team of dozens of NASA and space industry engineers who actively work on the proposal on an anonymous, volunteer basis in their spare time.
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    Just read about this, it looks like an interesting example of bottom-up innovation and self-organization.
Tobias Seidl

The Cochrane Collaboration - Welcome first-time visitors! - 0 views

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    This is an idependent organisation reviewing healthcare studies and basically judging the results. Something like the ACT for international medicine. Sounds interesting in the approach. Their suggestion for swine-flu prevention: wash your hands frequently. Nothing helps better.
pacome delva

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

  • 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.
Ma Ru

Geo-Engineering - Giving us time to act? - 0 views

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    May be of interest for Friederike and Nina... Link to the full report at the bottom of the page.
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    thanks Marek! hope that you are doing fine!!!
Juxi Leitner

IEEE Spectrum: German-U.S. Company to Loft Segmented, Self-Steering Airship - 0 views

  • Sanswire-TAO’s ultimate goal is to loft an airship that can ascend to the lower stratosphere, about 18 kilometers up, and fly for weeks or even months at a time, says Dan Erdberg, vice president of operations for Sanswire.
Juxi Leitner

Army heli-Weeble hops to avoid rubble trouble - tech - 18 September 2009 - New Scientist - 0 views

  • is a rotor-powered, bottom-heavy, self-righting vehicle that spends most of its time on the ground, thus conserving battery power. Instead of flying around, it hops, using a pair of contra-rotating rotors (to avoid the need for a tail rotor) mounted on an aluminium base. All this is encased in a spherical cage made of strong carbon-fibre spars (see diagram).
Joris _

Animal personalities: Unnatural selection | The Economist - 0 views

  • the first time that differences in personality have been shown in wild birds
  • hese analyses are based on the assumption that the animals collected represent a randomly selected and thus representative sample of the population.
  • Instead it looks as if such trapping studies are selecting the bravest individuals.
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    What if heuristic algorithms (PSO, DE, ...) do not actually simulate flocking birds or school gish beahviour ?!
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