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Dario Izzo

Past Future Predictions - 3 views

  • Dario Izzo
     
    "Computers in the future may weigh no more than 1.5 tons."

    Underoptimistic ... Excellent source of inspiration and quotation for all our reports
  • LeopoldS
     
    put them on the wiki ....
  • Francesco Biscani
     
    "Computers in the future may weigh no more than 1.5 tons."

    Technically, this is a correct prediction :P
Kevin de Groote

A Day in the Internet - 3 views

  • Kevin de Groote
     
    More decoration for Horizon...
  • pacome delva
     
    filtered by ESA:
    Category : "Pornography"
  • Kevin de Groote
Christos Ampatzis

Butterflies in the ISS - 4 views

  • Christos Ampatzis
     
    learning to flap wings without gravity
  • pacome delva
     
    is there something more than a video where nothing happens...?
Christos Ampatzis

Investigating the contribution of methane produced by ablating micrometeorites to the atmos... - 1 views

  • Christos Ampatzis
     
    title speaks for itself - so if it's not meteorites to blame, what is it?
  • Nicholas Lan
     
    link doesn't work for me
Nicholas Lan

Nuclear experts clean radioactive site with Cillit Bang - 0 views

  • Nicholas Lan
     
    Use of COTS products for low-cost nuclear reprocessing plant decommissioning. I suggest a brainstorming session for potential spin-in technologies involving walking around digros.
nikolas smyrlakis

Your Favorite Sci-Fi Movies, 2000 and Beyond | Underwire | Wired.com - 0 views

  • nikolas smyrlakis
     
    some ideas for movie Fridays
    A "must" see on my opinion (never heard about it in the past!) : Primer
    Sounds ideal:
    "Primer is a 2004 American science fiction film about the accidental discovery of time travel. The film was written, directed and produced by Shane Carruth, a mathematician and a former engineer, and was completed on a budget of $7,000.[1]
    Primer is of note for its extremely low budget, experimental plot structure and complex technical dialogue, which Carruth chose not to 'dumb down' for the sake of his audience. One reviewer said that "anybody who claims [to] fully understand what's going on in Primer after seeing it just once is either a savant or a liar."[2] The film collected the Grand Jury Prize at Sundance in 2004 before securing a limited release in US cinemas, and has since gained a cult following."
  • Ma Ru
     
    I watched it a while ago during my studies in Belgium... The plot is quite well summarized on this diagram: http://xkcd.com/657/large/
    According to the text above I'm either savant or a liar (you choose). But I watched the movie under significant exposure to Belgian beer, so this may have helped...
pacome delva

A Battery Made With Paper - 0 views

  • 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.
pacome delva

The Quasar That Built a Galaxy - 0 views

  • One of the quasar's jets is aimed directly at the galaxy, and the team thinks it's likely that the jet is driving the star-making process by blasting matter into the galaxy.
  • The discovery creates a new picture of galaxy formation
Nina Nadine Ridder

Top 10 Surprising Results of Global Warming | LiveScience - 5 views

  • Nina Nadine Ridder
     
    #4 is pretty interesting 
  • ...1 more comment...
  • LeopoldS
     
    first time I hear about this!!! Is there any peer reviewed paper reference to this? should impact missions like GOCE!!
  • Nina Nadine Ridder
     
    There are (even in Science):
    http://science-mag.aaas.org/cgi/reprint/314/5803/1253.pdf
    There is also a group at UCAR (lead by S. Solomon, one of the Gods in atmospheric research) who are analyzing this effect:
    http://www.ucar.edu/news/releases/2006/thermosphere.shtml
  • Joris _
     
    for the drag effect, this is well known in fluid mechanics, we use the Knudsen number, which explains this phenomenon ... for a perfect gaz though!
Dario Izzo

Computers in space - 3 views

  • Dario Izzo
     
    A link to help the discussion a few posts below....
  • LeopoldS
     
    one post above you mean ...?
  • Ma Ru
     
    Now that you commented, it's below :)
    [Edit] Fun reading btw.
Ma Ru

SpaceShip 2 Presented - 1 views

  • Ma Ru
     
    Space trip anyone?
LeopoldS

BBC NEWS | Science & Environment | Plans for UK satellite launcher - 0 views

  • LeopoldS
     
    ".... taking at least 50kg of payload into a polar orbit with a minimum altitude of 400km (248 miles), but engineers would aim to get significant additional performance.
    "We'd be looking at a range from 50 to up to a maximum of 200kg because you'd want to do different sizes of satellite," said Mr Whitehorn."
LeopoldS

pompeii, italy ruins - Google Maps - 2 views

  • LeopoldS
     
    fantastic walk through Pompei!
Dario Izzo

Probabilistic Logic Allows Computer Chip to Run Faster - 3 views

  • Dario Izzo
     
    Francesco pointed out this research one year ago, we dropped it as noone was really considering it ... but in space a low CPU power consumption is crucial!! Maybe we should look back into this?
  • ...6 more comments...
  • Ma Ru
     
    Q1: For the time being, for what purposes computers are mainly used on-board?
  • Dario Izzo
     
    for navigation, control, data handling and so on .... why?
  • Ma Ru
     
    Well, because the point is to identify an application in which such computers would do the job... That could be either an existing application which can be done sufficiently well by such computers or a completely new application which is not already there for instance because of some power consumption constraints...

    Q2 would be then: for which of these purposes strict determinism of the results is not crucial?

    As the answer to this may not be obvious, a potential study could address this very issue. For instance one can consider on-board navigation systems with limited accuracy... I may be talking bullshit now, but perhaps in some applications it doesn't matter whether a satellite flies on the exact route but +/-10km to the left/right?
    ...and so on for the other systems.

    Another thing is understanding what exactly this probabilistic computing is, and what can be achieved using it (like the result is probabilistic but falls within a defined range of precision), etc. Did they build a complete chip or at least a sub-circiut, or still only logic gates...
  • Dario Izzo
     
    Satellites use old CPUs also because with the trend of going for higher power modern CPUs are not very convenient from a system design point of view (TBC)... as a consequence the constraints put on on-board algorithms can be demanding. I agree with you that double precision might just not be necessary for a number of applications (navigation also), but I guess we are not talking about 10km as an absolute value, rather to a relative error that can be tolerated at level of (say) 10^-6. All in all you are right a first study should assess what application this would be useful at all.. and at what precision / power levels
  • Joris _
     
    The interest of this can be a high fault tolerance for some math operations, ... which would have for effect to simplify the job of coders!
    I don't think this is a good idea regarding power consumption for CPU (strictly speaking).
    The reason we use old chip is just a matter of qualification for space, not power. For instance a LEON Sparc (e.g. use on some platform for ESA) consumes something like 5mW/MHz so it is definitely not were an engineer will look for some power saving considering a usual 10-15kW spacecraft
  • Dario Izzo
     
    What about speed then? Seven time faster could allow some real time navigation at higher speed (e.g. velocity of a terminal guidance for an asteroid impactor is limited to 10 km/s ... would a higher velocity be possible with faster processors?)

    Another issue is the radiation tolerance of the technology ... if the PCMOS are more tolerant to radiation they could get more easily space qualified.....
  • Joris _
     
    I don't remember what is the speed factor, but I guess this might do it! Although, I remember when using an IMU that you cannot have the data above a given rate (e.g. 20Hz even though the ADC samples the sensor at a little faster rate), so somehow it is not just the CPU that must be re-thought.
    When I say qualification I also imply the "hardened" phase.
  • Francesco Biscani
     
    I don't know if the (promised) one-order-of-magnitude improvements in power efficiency and performance are enough to justify looking into this.

    For once, it is not clear to me what embracing this technology would mean from an engineering point of view: does this technology need an entirely new software/hardware stack? If that were the case, in my opinion any potential benefit would be nullified.

    Also, is it realistic to build an entire self-sufficient chip on this technology? While the precision of floating point computations may be degraded and still be useful, how does all this play with integer arithmetic? Keep in mind that, e.g., in the Linux kernel code floating-point calculations are not even allowed/available... It is probably possible to integrate an "accelerated" low-accuracy floating-point unit together with a traditional CPU, but then again you have more implementation overhead creeping in.

    Finally, recent processors by Intel (e.g., the Atom) and especially ARM boast really low power-consumption levels, at the same time offering performance-boosting features such as multi-core and vectorization capabilities. Don't such efforts have more potential, if anything because of economical/industrial inertia?
Dario Izzo

Paleo-Future - 2 views

  • ESA ACT
     
    A look into the future that never was
  • Dario Izzo
     
    And, for par condicio (see post below), an old link with a list of overoptimistic predictions
LeopoldS

China To Build Eco-City Cluster In Hubei - ChinaCSR.com - Corporate Social Responsibility (... - 0 views

  • LeopoldS
     
    ecological construction and environmental protection of a city cluster and more than CNY500 billion will be invested to build this eco-city cluster, which is to be centered on Wuhan.
LeopoldS

Ministry of Science and Technology of the People's Republic of China - 0 views

  • LeopoldS
     
    University Alliance for Low Carbon Energy
     
    Three universities, including Tsinghua University, University of Cambridge, and the Massachusetts Institute of Technology, have fostered up an alliance on November 15, 2009 to advocate low carbon energy and climate change adaptation The alliance will mainly work on 6 major areas: clean coal technology and CCS, homebuilding energy efficiency, industrial energy efficiency and sustainable transport, biomass energy and other renewable energy, advanced nuclear energy, intelligent power grid, and energy policies/planning. A steering panel made up of the senior experts from the three universities (two from each) will be established to review, evaluate, and endorse the goals, projects, fund raising activities, and collaborations under the alliance. With the Headquarters at the campus of Tsinghua University and branch offices at other two universities, the alliance will be chaired by a scientist selected from Tsinghua University.
     
    According to a briefing, the alliance will need a budget of USD 3-5 million, mainly from the donations of government, industry, and all walks of life. In this context, the R&D findings derived from the alliance will find its applications in improving people's life.
LeopoldS

China To Spend CNY1 Billion To Protect Rural Environment - ChinaCSR.com - Corporate Social ... - 1 views

  • LeopoldS
     
    interesting initiative - also with respect to "space and water" a theme we should explore a bit better in my view ...
Joris _

Why Computers Can't Mimic The Brain - Forbes.com - 3 views

  • engineers seem to have a diminished ability to understand biology
  • Remember them the next time you read a story claiming some brain-like accomplishment of a computer. The only really human thing these programs are doing is attracting attention to themselves
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