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pacome delva

Radiation fears stalk stellar mission - 0 views

physicsworld.com/...43063

space_mission GAIA solar_radiation

shared by pacome delva on 05 Jul 10 - Cached
  • Concern over ESA's handling of the radiation issue caused Michael Perryman, former GAIA project scientist, to resign from the agency in 2008. But GAIA science-team member Lennart Lindegren, an astronomer at Lund Observatory in Sweden, is confident that GAIA's unprecedented accuracy will be feasible. GAIA researchers will continue to perform tests and calibrations until at least 2011, which will include irradiating the CCDs at space-like temperatures. Lindegren admits, however, that they can never be certain of success until the spacecraft is in orbit and starts sending back data.
  • pacome delva on 05 Jul 10
     
    metamaterials to stop radiations?
  • LeopoldS on 05 Jul 10
     
    hmm ... in the optical range it is already a bit tricky .... lets brainstorm a bit about it ... anything in the literature? Luzi?
  • pacome delva on 06 Jul 10
     
    the components of the metamaterial need to have a size inversely proportional to the wavelenght, but here we are talking about high energy protons. So the idea was: is there metamaterials that change the electrical properties to solve this problem of holes in the material... but i dont have a clue !
Tobias Seidl

Wombats detected from space - 4 views

dx.doi.org/...0034-4257(80)90046-2

BIO AIR remote sensing

shared by Tobias Seidl on 03 Aug 10 - No Cached
  • Tobias Seidl on 03 Aug 10
     
    Demonstrates how useful space technology can be.
  • ...4 more comments...
  • Ma Ru on 03 Aug 10
     
    Also, this reminds me of a poem that once sprung out on my Linux console login: The wombat lives across the seas, Among the far Antipodes. He may exist on nuts and berries, Or then again, on missionaries; His distant habitat precludes Conclusive knowledge of his moods, But I would not engage the wombat In any form of mortal combat.
  • LeopoldS on 04 Aug 10
     
    sprung out of your console????? my mac never talks like this to me ....
  • Ma Ru on 05 Aug 10
     
    See? Even console can be user-friendly ;-) If I remember well, it was Slackware linux and at every console start-up the fortune program was launched : http://linux.die.net/man/6/fortune
  • LeopoldS on 07 Aug 10
     
    so you are still not convinced about macs being superior after working for a year with martin?
  • Ma Ru on 07 Aug 10
     
    Apparently not - I just got a brand new sexy Sony Vaio S :-)
  • LeopoldS on 09 Aug 10
     
    I am sorry for you ... :-)
Joris _

The seeds of disruptive innovation within the European Space Agency - 24 August 2010 > ... - 5 views

ewds.strath.ac.uk/...ce-Agency--24-August-2010.aspx

science

shared by Joris _ on 20 Sep 10 - No Cached
  • Joris _ on 20 Sep 10
     
    :p
  • ...1 more comment...
  • Luís F. Simões on 20 Sep 10
     
    haha :) well.. don't shoot me Dario. I wasn't involved in this disclosure. But now that the link is public, you might all want to consider subscribing to their feed: http://ewds.strath.ac.uk/space/Podcasts.aspx They have some nice talks there. One of them is by Ken McLeod, the science fiction writer. Is anyone else with me on the idea that we should also invite science fiction writers for science coffees? :)
  • Ma Ru on 21 Sep 10
     
    So nice to hear Dario again! :-) But apparently UoS needs someone a bit more skilled to handle these videos...
  • Dario Izzo on 21 Sep 10
     
    Only one self-comment alla Barney ..... suit-up
Nicholas Lan

ignobel winners 2010 - 2 views

improbable.com/winners

fun

shared by Nicholas Lan on 14 Oct 10 - Cached
  • Nicholas Lan on 14 Oct 10
     
    cheers to luca for pointing out the management one. netlogo model "demonstrating mathematically that organizations would become more efficient if they promoted people at random."
  • ...4 more comments...
  • LeopoldS on 14 Oct 10
     
    do you trust netlogo for this? :-)
  • nikolas smyrlakis on 14 Oct 10
     
    for the ignobel or the random promotions ? :P
  • Ma Ru on 14 Oct 10
     
    Nah... Marek's recognition reward definitively goes to: "Microbiological Laboratory Hazard of Bearded Men" (...) WHO ATTENDED THE CEREMONY: Manuel S. Barbeito was unable to travel, due to health reasons. :D
  • jmlloren on 15 Oct 10
     
    The page itself should be awarded with the ugliest layout. I have suggested to our management the implementation of the random promotion. Perhaps it is the future of democracy: representatives chosen at random.
  • LeopoldS on 15 Oct 10
     
    you mean "your management" at your current place?
  • jmlloren on 15 Oct 10
     
    Yes, it is not what is written? Indeed, it is already implemented. You are talking with the director of the Institute. I have been unlucky with the toss.
Ma Ru

Dream job for Tobias and the like? - 2 views

www.bbc.co.uk/...science-environment-11479323

BIO fun student spider fly

shared by Ma Ru on 06 Oct 10 - No Cached
  • LeopoldS on 10 Oct 10
     
    there is no "and the like" ... when talking of Tobias !!! :-)
Joris _

Robot's space debut 'giant leap for tinmankind' - 2 views

www.washingtonpost.com/...AR2010110103743.html

robot technology space

shared by Joris _ on 02 Nov 10 - No Cached
LeopoldS liked it
  • Joris _ on 02 Nov 10
     
    a robot Juxi talked about in a report, soon in the ISS
  • Ma Ru on 02 Nov 10
     
    They made him mute so that he can't say at some point "I'm afraid I can't do that, Barratt"...
Joris _

Japan plans to send a robot to the moon | The Australian - 1 views

www.theaustralian.com.au/...story-e6frg8y6-1225947783972

robot space moon

shared by Joris _ on 04 Nov 10 - No Cached
  • the little android's oil bearings and ultrasonic sensors will not work in the lunar vacuum
  • The one-sixth gravity presents problems for stable movement, and Moon dust clogs joints.
  • the Japan Aerospace Exploration Agency (Jaxa), the country's space agency. It runs the rockets needed to deliver their robot to the Moon and, so far, has been distinctly cool on the idea.
  • Joris _ on 04 Nov 10
     
    Interesting! I like the quote "Maybe China would allow that to be a one-way trip but, in Japan, it would have to be a return ticket" talking about a human mission ....
Isabelle DB

Evidence for a Collective Intelligence Factor in the Performance of Human Groups - 2 views

www.sciencemag.org/...686

intelligence team talking women

shared by Isabelle DB on 05 Nov 10 - No Cached
  • Isabelle DB on 05 Nov 10
     
    What do you think of this one ?
  • ...2 more comments...
  • Luzi Bergamin on 05 Nov 10
     
    Great! Women perhaps are not more intelligent as individuals, but now at least they have more collective intelligence... Interesting research topic, though, but I doubt that any of these results can be generalized to real live situations.
  • Isabelle DB on 05 Nov 10
     
    Maybe by passing the message to ensure some men understand it would be their interest to have (more) women in their teams ? No problem at the ACT, this maybe why it works so well ? :-))
  • Luzi Bergamin on 05 Nov 10
     
    Well, that's perhaps the reason, why meetings were always so f... boring while I was at ACT :D
  • sreejanag on 08 Nov 10
     
    Lots more resources on collective intelligence: http://cci.mit.edu/
santecarloni

[1011.6263] Electrostatic accelerometer with bias rejection for Gravitation and Solar S... - 6 views

arxiv.org/1011.6263

PHY gravity

shared by santecarloni on 30 Nov 10 - No Cached
  • santecarloni on 30 Nov 10
     
    Is it really true?
  • pacome delva on 02 Dec 10
     
    Article 1011.6263 doesn't exist
  • pacome delva on 03 Dec 10
     
    ha it's back! Yes they are talking about GAP since some time in France, and lobbying to put it on a planetary mission.
Francesco Biscani

The End Of Gravity As a Fundamental Force - 6 views

science.slashdot.org/...Gravity-As-a-Fundamental-Force

phy

shared by Francesco Biscani on 11 Jan 10 - Cached
LeopoldS liked it
  • Francesco Biscani on 11 Jan 10
     
    "At a symposium at the Dutch Spinoza-instituut on 8 December, 2009, string theorist Erik Verlinde introduced a theory that derives Newton's classical mechanics. In his theory, gravity exists because of a difference in concentration of information in the empty space between two masses and its surroundings. He does not consider gravity as fundamental, but as an emergent phenomenon that arises from a deeper microscropic reality. A relativistic extension of his argument leads directly to Einstein's equations."
  • ...8 more comments...
  • Dario Izzo on 12 Jan 10
     
    Diffcult for me to fully understand / believe in the holographic principle at macroscopical scales ... potentially it looks though as a revolutionary idea.....
  • pacome delva on 13 Jan 10
     
    never heard about it... seems interesting. At first sight it seems that it is based on fundamental principle that could lead to a new phenomenology, so that could be tested. Perhaps Luzi knows more about this ? Did we ever work on this concept ?
  • Luzi Bergamin on 13 Jan 10
     
    The paper is quite long and I don't have the time right now to read it in detail. Just a few comments: * We (ACT) definitely never did anything in this direction? But: is there a new phenomenology? I'm not sure, if the aim is just to get Einstein's theory as emergent theory, then GR should not change (or only change in extreme conditions.) * Emergent gravity is not new, also Erik admits that. The claim to have found a solution appears quite frequently, but most proposals actually are not emergent at all. At least, I have the impression that Erik is aware of the relevant steps to be performed. * It's very difficult to judge from a short glance at the paper, up to which point the claims are serious and where it just starts to be advertisments. Section 6 is pretty much a collection of self-praise. * Most importantly: I don't understand how exactly space and time should be emergent. I think it's not new to observe that space is related to special canonical variables in thermodynamics. If anybody can see anything "emergent" in the first paragraphs of section 3, then please explain me. For me, this is not emergent space, but space introduced with a "sledge hammer." Time anyway seems to be a precondition, else there is nothing like energy and nothing like dynamics. * Finally, holography appears to be a precondition, to my knowledge no proof exists that normal (non-supersymmetric, non-stringy, non-whatever) GR has a holographic dual.
  • Luzi Bergamin on 13 Jan 10
     
    Update: meanwhile I understood roughly what this should be about. It's well known that BH physics follow the laws of theormodynamics, suggesting the existence of underlying microstates. But if this is true, shouldn't the gravitational force then be emergent from these microstates in the same way as any theromdynamical effect is emergent from the behavior of its constituents (e.g. a gas)? If this can be prooven, then indeed gravity is emergent. Problem: one has to proof that *any* configuration in GR may be interpreted as thermodynamical, not just BHs. That's probably where holography comes into the play. To me this smells pretty much like N=4 SYM vs. QCD. The former is not QCD, but can be solved, so all stringy people study just that one and claim to learn something about QCD. Here, we look at holographic models, GR is not holographic, but who cares... Engineering problems...
  • LeopoldS on 13 Jan 10
     
    is there any experimental or observational evidence that points to this "solution"?
  • Luzi Bergamin on 13 Jan 10
     
    Are you joking??? :D
  • pacome delva on 14 Jan 10
     
    I was a bit fast to say it could be tested... apparently we don't even know a theory that is holographic, perhaps a string theory (see http://arxiv.org/abs/hep-th/9409089v2). So very far from any test...
  • LeopoldS on 14 Jan 10
     
    Luzi, I miss you!!!
  • Luzi Bergamin on 14 Jan 10
     
    Leo, do you mean you liked my comment on your question more than Pacome's? Well, the ACT has to evolve and fledge, so no bullshitting anymore, but serious and calculating answers... :-) Sorry Pacome, nothing against you!! I just LOVE this Diigo because it gives me the opportunity for a happy revival of my ACT mood.
  • pacome delva on 14 Jan 10
     
    haha, today would have been great to show your mood... we had a talk on the connection between mind and matter !!
Joris _

Pranav Mistry: The thrilling potential of SixthSense technology - 5 views

www.ted.com/..._of_sixthsense_technology.html

technology innovation

shared by Joris _ on 06 Feb 10 - Cached
Joris _ and Juxi Leitner liked it
  • Nicholas Lan on 08 Feb 10
     
    that is pretty impressive actually
Joris _

Quieting the Lizard Brain - 7 views

vimeo.com/5895898

managment creativity

shared by Joris _ on 16 Jan 10 - Cached
  • Joris _ on 16 Jan 10
     
    "What you do for a living is not be creative, what you do is ship," says bestselling author Seth Godin, arguing that we must quiet our fearful "lizard brains" to avoid sabotaging projects just before we finally finish them. ... or to me the importance of setting deadlines, objectives and planning to not sabotage your creative work!
  • ...1 more comment...
  • Juxi Leitner on 16 Jan 10
     
    ad "quieting the lizard brain" a friend of mine used to say: "if in doubt, do it!" had to think about that when he talks about the lizard brain getting us scared ...
  • Dario Izzo on 16 Jan 10
     
    scary guy ..... his 'shipping' philosophy and his 'everybody is creative' line is close to Marx description of alienation ... I share more Stroustrup point of view "The idea of software development as an assembly line manned by semi-skilled interchangeable workers is fundamentally flawed and wasteful."
  • Juxi Leitner on 18 Jan 10
     
    I don't think that is what he says, I think he says that everybody _can_ be creative but to be so you have to actually create things!
Francesco Biscani

Can Curiosity Be Programmed? - 4 views

developers.slashdot.org/...Can-Curiosity-Be-Programmed

ai

shared by Francesco Biscani on 28 Jan 10 - Cached
  • Francesco Biscani on 28 Jan 10
     
    Deja-vu?
  • Luzi Bergamin on 28 Jan 10
     
    He talks on "Singularity Summits" of good ol' Kurtzweil? Surprised?
Joris _

NASA budget for 2011 eliminates funds for manned lunar missions - washingtonpost.com - 3 views

www.washingtonpost.com/...AR2010013101058.html

shared by Joris _ on 01 Feb 10 - Cached
  • NASA's grand plan to return to the moon, built on President George W. Bush's vision of an ambitious new chapter in space exploration, is about to vanish with hardly a whimper
  • a commercial spacecraft that could taxi astronauts into low Earth orbit
  • Obama budget as disastrous for human space fligh
  • Francesco Biscani on 01 Feb 10
     
    Personally I think this is great.
  • ...1 more comment...
  • Joris _ on 01 Feb 10
     
    what is great exactly ? No human beings will put a foot on the Moon, or Mars, in the next 22 yrs and more ... what an awful waste!
  • Francesco Biscani on 01 Feb 10
     
    Well, the constellation program was a waste of money in its current form, overrun by delays and insufficient budget. We would have had Apollo 2.0 sixty years later, for what? At least now they are talking about going to asteroids, martian moons and stuff like that.
  • Joris _ on 01 Feb 10
     
    I agree that Constellation was a mistake. It is though a pity that now human Mars missions would certainly happen even later than initially hoped.
pacome delva

3D invisibility cloak unveiled - physicsworld.com - 1 views

physicsworld.com/...42043

transformation_optics cloaking

shared by pacome delva on 29 Mar 10 - Cached
  • For Wegener the aim of the work is not about focusing all efforts on creating invisibility cloaks, but is about exploring a range of applications in transformation optics. This involves calculating what kind of material is needed to bend light in a certain way, by considering light trajectories as the result of the warping of space. Wegener says that transformation optics should lead, for example, to the design of better antennas or smaller optical resonators.
  • Luzi Bergamin on 29 Mar 10
     
    We don't have Science Express subscription here, so I have to wait till the normal paper is out. From what I heard about it, I doubt that this would have made it to Science without the names Pendry and Wegener in the autor list! Certainly, they are two of the smartest guys in Metamaterials, but they are also two of the absolut class A sellers. Pendry by definition is the first in whatever (at least in HIS talks...) but apart from this he's a very nice guy. Better let's not try to characterize Wegener...
santecarloni

Anthony Atala on growing new organs | Video on TED.com - 5 views

www.ted.com/...organs_engineering_tissue.html

innovation biology organs

shared by santecarloni on 21 Dec 10 - Cached
LeopoldS liked it
  • santecarloni on 21 Dec 10
     
    for the unbelievers... :)
LeopoldS

YouTube - 7 digital trends at Davos 2011 [World Economic Forum talk] - 3 views

www.youtube.com/watch

technology INF

shared by LeopoldS on 27 Jan 11 - No Cached
  • dejanpetkow on 28 Jan 11
     
    I like the iToilet. In Japan this technology is used since many years, even on public places. In this sense, the electrified toilet is a trend only in western countries.
Giusi Schiavone

la simplexite' - 3 views

www.youtube.com/watch

shared by Giusi Schiavone on 08 Feb 11 - No Cached
  • Giusi Schiavone on 08 Feb 11
     
    very nice talk from Alain Berthoz
Nicholas Lan

prediction markets - 2 views

www.intrade.com/home

fun economics

shared by Nicholas Lan on 24 Feb 11 - No Cached
  • Nicholas Lan on 24 Feb 11
     
    talking of interesting business models - > futures markets for whether or not despots will still be in power by the end of the year. Markets>Foreign Affiars/International security
  • Ma Ru on 25 Feb 11
     
    "Challenge the Intrade Crowd with Your Wisdom"... Yeah...
Luís F. Simões

Why Randomly-Selected Politicians Would Improve Democracy - Technology Review - 4 views

www.technologyreview.com/...26488

CMS politics Ig Nobel

shared by Luís F. Simões on 10 Mar 11 - No Cached
LeopoldS liked it
  • If Pluchino sounds familiar, it's because we've talked about him and his pals before in relation to the Peter Principle that incompetence always spreads through big organisations. Back in 2009, he and his buddies created a model that showed how promoting people at random always improves the efficiency of the organisation. These guys went on to win a well-deserved IgNobel prize for this work.
  • Ref: arxiv.org/abs/1103.1224: Accidental Politicians: How Randomly Selected Legislators Can Improve Parliament Efficiency
  • Luzi Bergamin on 10 Mar 11
     
    I think I start to understand why Italian politics does so horribly bad...
  • LeopoldS on 10 Mar 11
     
    ... because they don't follow this rule!
  • Dario Izzo on 11 Mar 11
     
    According to the authors we have four types of people in the parlement: 1) intelligent people whose actions produce a gain for both themselves and for other people. 2) helpless/naive people in the top left quadrant whose actions produce a loss for themselves but a gain for others; 3) bandits whose actions produce a gain for themselves but a loss for other people. 4) stupid people in the bottom left quadrant produce a loss for themselves and also for other people. According to the above definition it is clear that their model does not apply to the italian parlament where we only have stupid people and bandits.
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