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Luís F. Simões

Timelapse video of asteroid discoveries in our solar system from 1980-2010 (watch in 10... - 5 views

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    Nice... Now I have a lame question: after you have discovered ~500k asteroids, all moving (I assume more or less) chaotically in that asteroid belt, how do you tell one from another?
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    hmm, not very chaotic indeed - laws of Kepler plus some perturbations.
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    That's what I thought but when presented as a green "goo" in the video, it appears rather unordered... so I guess this is just an impression evoked by a not-to-scale presentation?
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    It depends... orbits can be chaotic if the orbital period is in a resonance with Jupiter, although such orbits are not stable. Such configurations tend to get disrupted pretty quickly (in cosmic terms :P) http://en.wikipedia.org/wiki/Kirkwood_gap
Luzi Bergamin

"ride sharing 2.0" with car2gether - 2 views

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    Pretty close to what we suggested for "system of systems." Was an excellent exercise in bullshitting, but of course ESA is not innovative enough. Now it's too late, Daimler did it...
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    not sure they will end up needing a lot of "space" though ...
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    There is no "space" yet, at least I didn't find any. But that's because they didn't consider specific hardware, but normal mobile phones. The step to include "space" is obvious, though, and I'm sure they thought about this as well...
Joris _

Cyber Experts Have Proof That China Has Hijacked U.S.-Based Internet Traffic: UPDATED -... - 0 views

  • For 18 minutes in April, China’s state-controlled telecommunications company hijacked 15 percent of the world’s Internet traffic
  • The telephone giants of the world work on a system based on trust,
  • They also trust that this system won’t be abused.
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    Some issues with internet. Let's invent the future internet ...
Luís F. Simões

MoNETA: A Mind Made from Memristors (IEEE Spectrum) - 0 views

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    (don't forget to turn your hype-filters on...) MoNETA (http://cns.bu.edu/nl/moneta.html) stands for "MOdular Neural Exploring Traveling Agent". It is one of projects participating in the DARPA-funded SyNAPSE project ("Systems of Neuromorphic Adaptive Plastic Scalable Electronics"): http://www.darpa.mil/dso/thrusts/bio/biologically/synapse/index.htm http://www.darpa.mil/dso/solicitations/baa08-28.html
Christos Ampatzis

YouTube - Honda Presents: LIVING WITH ROBOTS - 1 views

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    The weight support system seems to me interesting for space and astronauts...plus lets hire an asimo!
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    Come on guys, Asimo sucks! Get an iCub: http://www.youtube.com/watch?v=Dmj5TP7XIFE&feature=related
Juxi Leitner

Technology Review: Blogs: arXiv blog: Physicist Discovers How to Teleport Energy - 4 views

  • He gives the example of a string of entangled ions oscillating back and forth in an electric field trap, a bit like Newton's balls. Measuring the state of the first ion injects energy into the system in the form of a phonon, a quantum of oscillation. Hotta says that performing the right kind of measurement on the last ion extracts this energy. Since this can be done at the speed of light (in principle), the phonon doesn't travel across the intermediate ions so there is no heating of these ions. The energy has been transmitted without traveling across the intervening space.
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    wonder if we can use that to power a moon base .... or on-board a SBSP satellite
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    will still have to read the actual article but am a bit sceptic if this interpretation really will hold ... what are our fundamental physicists saying about this?
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    I am not the physicist but I thought it might be interesting, from a space security point-of-view
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    Yes it seems really interesting and opens new possibilities. However this technology review article is not very good and the guy uses terms which have a precise meaning (like teleportation), which is different from the word we know... Quantum teleportation is what we use for designing quantum computers, but we are quite far from any practical applications. This energy teleportation will allow new scheme involving energy (if it is experimentally confirmed) which is very nice. However it seems this occurs in an entangled many-body system, which the only macroscopic one I know is a bose-eintein condensate (BEC). So it would mean infuse energy in the BEC by doing a measurement on one of the atom and extract it few millimeters away by doing a measurement on another atom. very far from any long distance power transmission...
nikolas smyrlakis

The Olympics run on Windows (XP) | Beyond Binary - CNET News - 3 views

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    The good news for Microsoft is that all the PCs powering the Olympics are running Windows. The bad news: it's the older Windows XP operating system.
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    Now I start to understand why the Swiss win so many medals. That's most probably a bug!!!
Joris _

DoD Buzz | Back Away from GPS: AF Chief - 4 views

  • develop alternatives to GPS
  • The fact that the U.S., which invented GPS and most of what depends on it (ATMs, gas pumps, trucking companies and lost spouses), would consider stepping away from the system marks a cultural and technological milestone
  • recommended that the U.S. scrap building five more GPS satellites and engage European allies on sharing their proposed Galileo global navigation satellite system
Francesco Biscani

What Should We Teach New Software Developers? Why? | January 2010 | Communications of t... - 3 views

shared by Francesco Biscani on 15 Jan 10 - Cached
Dario Izzo liked it
  • Industry wants to rely on tried-and-true tools and techniques, but is also addicted to dreams of "silver bullets," "transformative breakthroughs," "killer apps," and so forth.
  • This leads to immense conservatism in the choice of basic tools (such as programming languages and operating systems) and a desire for monocultures (to minimize training and deployment costs).
  • The idea of software development as an assembly line manned by semi-skilled interchangeable workers is fundamentally flawed and wasteful.
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    Nice opinion piece by the creator of C++ Bjarne Stroustrup. Substitute "industry" with "science" and many considerations still apply :)
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    "for many, "programming" has become a strange combination of unprincipled hacking and invoking other people's libraries (with only the vaguest idea of what's going on). The notions of "maintenance" and "code quality" are typically forgotten or poorly understood. " ... seen so many of those students :( and ad "My suggestion is to define a structure of CS education based on a core plus specializations and application areas", I am not saying the austrian university system is good, but e.g. the CS degrees in Vienna are done like this, there is a core which is the same for everybody 4-5 semester, and then you specialise in e.g. software engineering or computational mgmt and so forth, and then after 2 semester you specialize again into one of I think 7 or 8 master degrees ... It does not make it easy for industry to hire people, as I have noticed, they sometimes really have no clue what the difference between Software Engineering is compared to Computational Intelligence, at least in HR :/
Christos Ampatzis

BBC NEWS | Technology | Down on the farm with the robots - 1 views

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    - Smart Tractors?!?!? - "Guidance systems are enablers," said Mr James. "Farmers buy them with one job in mind and then realise they can use it for lots more."
pacome delva

BEC coupled to mechanical oscillator - 0 views

  • Treutlein and colleague’s work represents an important step forward in the use of ultracold atoms to study mechanical systems. "This experiment clearly demonstrates the possibility to use ultracold atomic systems as diagnostic tools and high-precision sensors, this is a very promising route of research," he said.
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    nice!!!
Joris _

DARPA Looking for Partner On Wireless Spacecraft Demo | SpaceNews.com - 1 views

  • DARPA for several years has been working on a program dubbed System F6 that seeks to prove that a cluster of small spacecraft can perform the mission of a large spacecraft by communicating wirelessly with one another in space
  • DARPA plans to launch three dedicated System F6 spacecraft either to low Earth orbit or geostationary orbit in mid-2013 to 2014
  • semi-autonomous cluster reconfiguration
pacome delva

Commercial quantum cryptography system hacked - 0 views

  • quantum cryptography, according to some engineers, is not without its faults. In a preprint submitted late last week to arXiv, Hoi-Kwong Lo and colleagues at the University of Toronto, Canada, claim to have hacked into a commercial quantum cryptography system by exploiting a certain practical “loophole”.
Juxi Leitner

Open Source Satellite Initiative | machine project - 3 views

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    All the satellite-related systems (except for the rocket to launch it) are DIY programs -- designed so that regular people may also have the chance of developing and eventually launching their own.
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    The book is actually funny to read ... but this is not serious! Is it ?
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    I was saying that mainly because of some flaws - the piggy-pack installation, no dedicated stage, the limited control, ... It is so far very funny, but once he can fill all the gaps, it should be an excellent initiative - although careful about the debris if anyone has its own ;p
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    his quote: "when art becomes practical, we call it technology; when technology becomes useless, we call it art" ... this is probably the later one ....
Christos Ampatzis

WikiLeaks: Galileo satnav system called 'stupid idea' - 7 views

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    oops
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    German honesty!!
Luís F. Simões

Rainmaking in Middle Eastern Desert: Success or Scam? | Weather Modification Projects i... - 1 views

  • Fifty-two unanticipated rain showers in a Middle Eastern desert supposedly occurred because of ionizing devices installed in Abu Dhabi as part of a weather-modification project, a company is claiming.
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    This seems to be the Swiss company's website: http://www.meteo-systems.com
Giusi Schiavone

Glutamate receptors-like (GLRs) and D-serine connecting plant with animal nervous system - 3 views

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    The release reports that researcher José Feijó says the " findings, implicating analogous genes in growth processes in both plants and animals, underscores how evolution re-uses successful mechanisms, over and over again."
santecarloni

Even Robots Can Be Heroes - ScienceNOW - 5 views

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    "Computer simulations of tiny robots with rudimentary nervous systems show that, over hundreds of generations, these virtual machines evolve altruistic behaviors"
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    I have lost track of all the artificial life/evolutionary computing studies showing the evolution of cooperation/altruism. I don't understand why all the big fuss about this latest one.
santecarloni

[1108.4767] Capturing Near Earth Objects - 3 views

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    I sit really possible/desirable?
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    It is possible, and NEOs may offer interesting ressources, but there is nothing in that paper. Why do they use the Sun-Earth system and not the Earth-Moon? The condition C>C1 is very weak and would have been much better had it been applied to the Earth-Moon system.
Francesco Biscani

iTWire - London Stock Exchange gets the facts and dumps Windows for Linux - 1 views

  • Microsoft’s marketing arm excitedly churned out a case study in 2005 when the London Stock Exchange (LSE) rolled out a C# stock exchange ticker system on Windows Server 2003 and SQL Server 2000. Four years later the LSE has scrapped the whole system in favour of a Linux-based solution instead.
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    Microsoft "Gets the facts".
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