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Giusi Schiavone

Selective attention processes - 2 views

www.youtube.com/...NatureVideoChannel

shared by Giusi Schiavone on 27 Oct 10 - No Cached
  • Giusi Schiavone on 27 Oct 10
     
    they use invasive BCI for accessing to single neural cell on patiences with epilepsy.
  • ...1 more comment...
  • LeopoldS on 27 Oct 10
     
    scary ...
  • Giusi Schiavone on 27 Oct 10
     
    why? I think they used patients with epilepsy because they already had an implants with electrodes, for other reasons. Otherwise in normal subjects they could not obtain these results. I wonder who (among normal subject) would like to have electrodes implanted in the brain....thus they use subjects that already have an implant.
  • LeopoldS on 27 Oct 10
     
    well if I got it correctly then the had to cut and fizzle around in these brains ... always scaring, and then they claim that we have in our brains in single neurons abstract images e.g. of marilyn monroe . they speak even of Marilyn Monroe neurons :-) similarily his question "who is in control? are we in control of our neurons or our neurons in control of us? " ....
Joris _

Obama's dream of Mars at risk from radiation - physicsworld.com - 0 views

physicsworld.com/...44254

mars technology

shared by Joris _ on 05 Nov 10 - No Cached
  • Schwabe cycle
  • Schwabe cycle, where sunspot numbers reach a peak roughly once every 11 years
  • the intensity of each solar maximum is also thought to oscillate over a period, called the Gleissberg cycle
  • ...3 more annotations...
  • The worse-case scenario is that if you radiate a crew sufficiently, they'd all succumb to radiation sickness within a few days and essentially vomit and diarrhoea themselves to death within an enclosed capsule
  • The Moon missions were just blind lucky,” explains Lewis Dartnell, an astrobiologist at University College, London. “The astronauts would have experienced radiation sickness and a higher risk of future cancer if they'd been hit,” he adds.
  • Hapgood and colleagues are currently working on an alternative technique that involves surrounding the spacecraft with a plasma shield to deflect incoming protons without creating secondary radiation
Joris _

LaTeX Search - Mathematical Equations in Scientific Publications. - 2 views

www.latexsearch.com/home.do

maths

shared by Joris _ on 10 Nov 10 - No Cached
LeopoldS liked it
  • Joris _ on 10 Nov 10
     
    can be helpful ... but also very tricky. There are so many ways to write the same equation...
Joris _

American Institute of Aeronautics and Astronautics - New Horizons Challenge - 5 views

www.aiaa.org/content.cfm

shared by Joris _ on 16 Nov 10 - No Cached
Juxi Leitner liked it
  • Joris _ on 16 Nov 10
     
    the ACT should participate, a least someone in it, ...
  • LeopoldS on 16 Nov 10
     
    seems as if they are lacking ideas ?? :-) and honestly: "The Grand Prize Winner will be announced 6 January and will receive $500 plus a one year, on-line subscription to the AIAA Journal of their choice. Two runner-up winners will each receive $250 and a one year, on-line subscription to the AIAA Journal of their choice." ... :-)
santecarloni

[1010.3437] Dynamical mass generation via space compactification in graphene - 0 views

arxiv.org/1010.3437

technology science PHY

shared by santecarloni on 27 Oct 10 - No Cached
  • santecarloni on 27 Oct 10
     
    Is it really possible?
  • ...2 more comments...
  • Luzi Bergamin on 27 Oct 10
     
    The affiliation is Saudi Arabia and Marocco, not countries famous for their contributions to physics... But nonetheless, yes this is possible, to me it even looks very plausible! But you should know that the term "mass" in this context just means a certain parameter in the dynamical equations and only has a loose relation to what we usually call "mass" in the macroscopic world.
  • LeopoldS on 27 Oct 10
     
    ok - admit that I only read the abstract but to me the seems to be a little bit of magic happening ... even if "mass is only a certain parameter in the dynamical equations" ... I assume it still bears some "heavy" consequences in terms of their speed, interactions etc, no? and assuming that you gradually bend such a structure from a 2D to a 1D one ... does it "gain" mass gradually? all very strange to me ...
  • santecarloni on 28 Oct 10
     
    I think the problem is in the boundary conditions... the issue is that if you use and infinite sheet or a cylinder in the equations you always take cyclic boundary condition. If this guys are right then the mass of the quasi-particles in a crystal depends on its topology... this is a major thing...
  • Luzi Bergamin on 28 Oct 10
     
    BINGO!! It's almost like good ol' Kaluza-Klein...
Francesco Biscani

Apple sending Xserve to giant server farm in the sky - 3 views

arstechnica.com/...pro-server-takes-its-place.ars

apple inf

shared by Francesco Biscani on 05 Nov 10 - No Cached
  • After more than eight years on the market, Apple is euthanizing the Xserve.
  • Francesco Biscani on 05 Nov 10
     
    YES YES YES! And good riddance! :)
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

Team:Hong Kong-CUHK/Project - 2010.igem.org - 2 views

2010.igem.org/...Project

nan BIO technology

shared by santecarloni on 26 Nov 10 - No Cached
LeopoldS liked it
  • santecarloni on 26 Nov 10
     
    impressive...
  • LeopoldS on 27 Nov 10
     
    not sure how to understand this: " Employing a specially people are denied access to obtain the information." ...
Christos Ampatzis

NASA news conference Dec. 2, on extraterrestrial life?! - 3 views

www.nasa.gov/...M10-110.html

space BIO fun

shared by Christos Ampatzis on 01 Dec 10 - No Cached
  • Christos Ampatzis on 01 Dec 10
     
    Let's start betting which party Aliens vote: GREEN, BLUE, RED, BLACK?
  • ...3 more comments...
  • Luís F. Simões on 01 Dec 10
     
    yes, the internet is going crazy over this one :) (http://cumbriansky.wordpress.com/2010/11/30/nasas-astrobiology-press-conference/) This is the most likely scenario I've seen so far for what will be announced tomorrow: http://skymania.com/wp/2010/11/alien-life-form-is-here-on-earth.html/ "...discovery of microbes in a deadly poisonous lake that get their energy from arsenic. Experts say this shows they had a completely different origin to any other creature known on our planet. It means that life began not just once but at least twice on Earth."
  • Joris _ on 02 Dec 10
     
    well, we've all seen the movie Evolution (http://www.imdb.com/title/tt0251075/) ;p ... this is exactly this scenario indeed.
  • Ma Ru on 02 Dec 10
     
    yaaawnnn... Let's wait until they actually announce it.
  • nikolas smyrlakis on 02 Dec 10
     
    http://astrobiology.nasa.gov/ for the moment is down. My bet, the microbe they found notified its cousins and they are currently invading the US
  • Luís F. Simões on 02 Dec 10
     
    you can still see the rest of it here: http://www.nasa.gov/multimedia/nasatv/index.html a good link with a summary and discussion on the announcement is here: http://www.guardian.co.uk/science/2010/dec/02/nasa-life-form-bacteria-arsenic
santecarloni

[1011.6263] Electrostatic accelerometer with bias rejection for Gravitation and Solar System physics - 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.
Christos Ampatzis

Rates of Scientific Fraud Retractions - 6 views

blogs.nature.com/...rates-of-scientific-fraud

shared by Christos Ampatzis on 19 Nov 10 - No Cached
  • Christos Ampatzis on 19 Nov 10
     
    Good to see "The Netherlands" not in the top list... Btw Fraud detection becoming hot potato in EU funding...
  • LeopoldS on 20 Nov 10
     
    not surprising since usually EC staff has no clue what people do with their funds once the are allocated ... as long as there is a report and a website :-)
Luís F. Simões

This Will Change Everything: Ideas That Will Shape the Future (The Edge Annual Question - 2009) - 3 views

www.edge.org/q09_index.html

edge future science technology

shared by Luís F. Simões on 28 Nov 10 - Cached
LeopoldS liked it
  • WHAT WILL CHANGE EVERYTHING? "What game-changing scientific ideas and developments do you expect to live to see?"
  • That's the question John Brockman, editor of the Web site edge.org, posed to about 160 cutting-edge minds in his 11th annual Edge Question. As in years past, they responded with bold, often thrilling, sometimes chilling, answers.
  • Luís F. Simões on 28 Nov 10
     
    And here's the same thing, but in dead-trees format: http://www.amazon.com/This-Will-Change-Everything-Future/dp/0061899674 Anyone else thinks that the ACT should buy us all a copy as a Christmas present? :)
  • LeopoldS on 29 Nov 10
     
    you are the ACT!!!
Luís F. Simões

Self-assembly of nano-rotors - 1 views

portal.mytum.de/..._article.2010-11-23.0012596660

nanotechnology self-organization self-assembly cellular_automata

shared by Luís F. Simões on 25 Nov 10 - No Cached
  • the coveted dream of using self-organization effects in such a way that nano machines assemble themselves is still a thing of the future. The rotors developed in Garching are an important step in this direction.
terencepf

helium discussion - 0 views

www.infidels.org/...helium.html

helium atmosphere science

shared by terencepf on 03 Dec 10 - No Cached
  • terencepf on 03 Dec 10
     
    This link has a nice concise explanation of helium escaping the atmosphere. http://www.astronomynotes.com/solarsys/s3.htm (this link describes the mechanics of particles escaping the atmosphere, this includes escape velocity, thermal and nonthermal process) http://www.springerlink.com/content/k094u75188h64516/fulltext.pdf ( and if you are really interested, this paper discuss helium in the atmosphere (production and loss) in much more detail )
Ma Ru

ESA Request for information - 1 views

www.esa.int/...SEMQ4MOR9HG_index_0.html

space commercial spaceflight esa technology science

shared by Ma Ru on 08 Dec 10 - No Cached
  • Ma Ru on 08 Dec 10
     
    Looks like ESA suddenly realised there are some serious commercial spaceflight projects going on... Anyway the effort looks to me a bit optimistic... shouldn't they ask the companies directly rather than counting they'll spot the call on ESA website and will bother to answer it?
Joris _

Japan probe overshoots Venus, heads toward sun - 0 views

www.washingtonpost.com/...AR2010120701077.html

MAD venus robust

shared by Joris _ on 08 Dec 10 - No Cached
sreejanag liked it
  • A Japanese probe to Venus failed to reach orbit Wednesday and was captured by the sun's gravitational pull
  • Akatsuki's engines did not fire long enough to attain the proper orbiting position
  • may be able to try again when it passes by Venus six years from now.
  • Joris _ on 08 Dec 10
     
    The usefulness of having a robust trajectory :) ... They have to wait 6 more years for another date with Venus ...
  • ...2 more comments...
  • Joris _ on 09 Dec 10
  • LeopoldS on 11 Dec 10
     
    I agree in general but just out of the stomach: is there really an optimised trajectory that would be able to avoid this kind of scenarios when main thrusters don't perform properly? Wouldn't you in any case end up in a sun-orbiting trajectory and have to come back after years??
  • Joris _ on 11 Dec 10
     
    "optimised trajectory" of course not, robust definitely! It was the subject of my paper presented at the AAS (the one in San Diego) "Designing robust interplanetary trajectories subject to one temporary engine failure". The problem here is that they do not have enough fuel for a correction maneuver that would allow to come back to Venus earlier, and break for a VOI. A robust scenario could have alloted the best amount of fuel and time to be able to recover from almost all possible unplanned events. In the paper, I introduce some confidence regions such that I get the robust control for p% chance of mission success in case m% chance of problem with the propulsion system.
  • Dario Izzo on 12 Dec 10
     
    You should run your method on this scenario and see if you could get a trajectory with a shorter come back time using the same spacecraft.... would be a big selling point for a new trajectory design approach
santecarloni

Why Scientific Studies Are So Often Wrong: The Streetlight Effect | Health & Medicine | DISCOVER Magazine - 1 views

discovermagazine.com/...often-wrong-streetlight-effect

science studies

shared by santecarloni on 14 Dec 10 - No Cached
  • nikolas smyrlakis on 14 Dec 10
     
    "Cardiologists had been so focused on immediately measurable arrhythmias that they had overlooked the longer-term but far more important variable of death." lol
Ma Ru

Yet another issue to take into account when you want to travel at c - 1 views

www.newscientist.com/...lls-especially-warp-speed.html

PHY interstellar travel human spaceflight speed of light

shared by Ma Ru on 19 Feb 10 - Cached
  • Ma Ru on 19 Feb 10
     
    While my attitude to articles about interstellar travel is generally sceptical, this one seems to raise quite an interesting point... Physicists?
  • ...1 more comment...
  • pacome delva on 19 Feb 10
     
    mmm, I think that if we manage to travel at 99.999998 per cent the speed of light, we'll have the technology to deviate these atoms ! one way could be a super strong magnetic field, or a super laser that would act as an ice breaker with the radiation pressure (the good thing is that light always travel at the speed of light, even if you are at 99.999998 per cent the speed of light)
  • Francesco Biscani on 19 Feb 10
     
    Also, remember never to dereference null pointers.
  • Ma Ru on 19 Feb 10
     
    True, it's almost like installing accelerometers upside down...
Juxi Leitner

The BCI X PRIZE: This Time It's Inner Space | h+ Magazine - 3 views

hplusmagazine.com/...-x-prize-time-it's-inner-space

tech bmi

shared by Juxi Leitner on 10 Feb 10 - Cached
LeopoldS liked it
  • The Brain-Computer Interface X PRIZE will reward a team that provides vision to the blind, new bodies to disabled people...
  • LeopoldS on 11 Feb 10
     
    nice! are they studying our website?
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