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Loretta Latronico Poulain

Behavioural Economics? Try Biological Economics - 2 views

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    The "Biological Economics" thing is a hyping (or misunderstanding) of the BBC article. The work it refers to seems to be an application of Complex Networks theory to financial networks. I found what appear to be some of the related publications: Andrew G. Haldane (April 2009) Rethinking the financial network (further references in the footnote to page 10) Erlend Nier, Jing Yang, Tanju Yorulmazer and Amadeo Alentorn (April 2008) Network models and financial stability Funny how these issues have been repeatedly popping up at the ACT in recent weeks. This connects both with the discussions on information spreading in networks, and with roadmaps' robustness.
pacome delva

Will the LHC find supersymmetry? - 0 views

  • But not everyone is optimistic about discovering SUSY. "We will get in a crisis, I think, in a few years," Dorigo predicts, sceptical of the theory because it introduces so many new particles of which data presently show "no hints". However, even though he would lose a $1000 bet, he says that he would still be among the first celebrating if the LHC does turn up sparticles.
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    Certainly too early for a definite answer, they will keep us in suspense for another few years. But don't worry, whatever is found, Arkani-Hamed will have at least 50 models that can explain this...
pacome delva

Gravitational Theory Reproduces Superconducting Circuitry | Physical Review Focus - 0 views

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    Another candidate for analogue gravity ?
Luís F. Simões

New algorithm offers ability to influence systems such as living cells or social networks - 3 views

  • a new computational model that can analyze any type of complex network -- biological, social or electronic -- and reveal the critical points that can be used to control the entire system.
  • Slotine and his colleagues applied traditional control theory to these recent advances, devising a new model for controlling complex, self-assembling networks.
  • Yang-Yu Liu, Jean-Jacques Slotine, Albert-László Barabási. Controllability of complex networks. Nature, 2011; 473 (7346): 167 DOI: 10.1038/nature10011
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    Sounds too super to be true, no?
  • ...3 more comments...
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    cover story in the May 12 issue of Nature
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    For each, they calculated the percentage of points that need to be controlled in order to gain control of the entire system.
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    > Sounds too super to be true, no? Yeah, how else may it sound, being a combination of hi-quality (I assume) research targeted at attracting funding, raised to the power of Science Daily's pop-pseudo-scientific journalists' bu****it? Original article starts with a cool sentence too: > The ultimate proof of our understanding of natural or technological systems is reflected in our ability to control them. ...a good starting point for a never-ending philosophers' debate... Now seriously, because of a big name behind the study, I'm very curious to read the original article. Although I expect the conclusion to be that in practical cases (i.e. the cases of "networks" you *would like to* "control"), you need to control all nodes or something equally impractical...
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    then I am looking forward to reading your conclusions here after you will have actually read the paper
LeopoldS

BBC News - Speed-of-light experiments give baffling result at Cern - 5 views

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    Sante, Luzi have a look at this???!!!
  • ...3 more comments...
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    and here's the xkcd on it: http://xkcd.com/955/
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    And here's the arXiv paper http://arxiv.org/abs/1109.4897 Serious? Difficult to say. I'm theorist and can't really rate their measurement techniques. Certainly be cautious, mostly such things disappear faster than they appeared.
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    it took them 3 years to "appear"!
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    Leo, you mean that they measured 3 years? That's not a point to criticize: since the only interaction of neutrinos with matter is the Weak Interaction (which is indeed very, very weak), it is extremely hard to get a reasonable statistic. By the same reason, it's essentially impossible to shield the experiment from the background. And this background (solar neutrinos, cosmic radiation neutrinos) is huge.
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    for sure a result to be taken seriously. It makes a buzz in my lab... but always be cautious with this kind of declaration, that hugely violates all physics we know and even most of the reasonable alternative theories... Remember the Pionneer anomaly for which it took almost ten years to set up that finally its a thermal effect.
Nina Nadine Ridder

Essay - The Collider, the Particle and a Theory About Fate - NYTimes.com - 4 views

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    cannot access to this one...
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    Sorry, works for me though... Dunno what s wrong!
LeopoldS

Cheater-resistance is not futile : Article : Nature - 2 views

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    Cheater-resistance is not futile - what lessons for the team??
nikolas smyrlakis

'Terrorist Facebook' - the new weapon against al-Qa'ida - World Politics, Wo... - 0 views

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    Intelligence agencies are building up a Facebook-style databank of international terrorists in order to sift through it with complex computer programs aimed at identifying key figures and predicting terrorist attacks before they happen.
ESA ACT

Is mathematical pattern the theory of everything? - 0 views

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    Widely believed to be nonsense among serious theorists.
ESA ACT

Surfer-Physicist A. Garrett Lisi's Unified Theory Leads to Fame, Backlash - 0 views

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    article about famous Lisi paper ...
ESA ACT

Crackpot index - 0 views

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    For the ACT stamp committee
ESA ACT

Scaling theory for information networks - Journal Article - 0 views

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    This is an article that examines information network both enigneered and evolved ones. The find striking similarities and examine the differences.
ESA ACT

Big Brain Theory: Have Cosmologists Lost Theirs? - New York Times - 0 views

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    How (string) cosmologists vaste their time
ESA ACT

Long Bets - By 2025, new astronomical observations and theories will render the Big Ban... - 0 views

shared by ESA ACT on 24 Apr 09 - Cached
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    First, a great website for random ideas. Secondly, who wants to contend this idea?
ESA ACT

Is Earth at the heart of a giant cosmic void? - 0 views

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    For those who think that we already know very much about the universe...
nikolas smyrlakis

Bio-Mimetic Approaches in Management Science, Book - Barnes & Noble - 1 views

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    Oh yes somebody seems to have found a link between CMS and Biomimetics. Everything is possible now, even Fundamental physics !
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    Neural networks = biomimetics. That's the conclusion from the TOC. It seems that biomimetics becomes the worse usurper than string theory.
Luís F. Simões

Pioneer Anomaly Solved By 1970s Computer Graphics Technique - Technology Review - 4 views

  • Now Frederico Francisco at the Instituto de Plasmas e Fusao Nuclear in Lisbon Portugal, and a few pals, say they've worked out where the thermal calculations went wrong. These guys have redone the calculations using a computer model of not only how the heat is emitted but how it is reflected off the various parts of the spacecraft too. The reflections turn out to be crucial.
  • Ref: arxiv.org/abs/1103.5222: Modelling The Reflective Thermal Contribution To The Acceleration Of The Pioneer Spacecraft
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    This is really cool. I know one of the authors and he is a good guy... the only thing that leaves me unsatisfied is that if the whole issue is related to thermal effects one should have seen the Pioneer effect all the time and not only at about 10 AU... ...or is there some thermal process that kicked in only at this distance?
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    Here's an update on this theory: NASA Releases New Pioneer Anomaly Analysis "The mysterious force acting on the Pioneer spacecraft seems to be falling exponentially. That's a strong clue that on-board heat is to blame, says NASA." Heat emission 'most likely cause' of pioneer anomaly "What's more interesting is that, contrary to the original analysis conducted all those years ago, the deceleration does seem to be decelerating at an exponential rate -- just as one might expect from the radioactive decay of plutonium-238, which powers the two spacecraft. Turyshev concludes, "The most likely cause of the Pioneer anomaly is the anisotropic emission of on-board heat.""
pacome delva

Physics - Fruit flies swim through air - 1 views

  • A new experiment reported in Physical Review Letters shows that—contrary to popular wisdom—paddling can be as effective in air as it is in water. This could imply that insects evolved their flight capability from some earlier swimming trait.
  • Using high-speed video cameras to track wing motion, the team observed certain cases where the flies paddled their wings forward and backward. To confirm that this was indeed drag-based motion, the team plugged their wing data into an “insect flight simulator” and found that they could reproduce the fly’s overall movement. The authors constructed a simple model of paddling, which seems to support the theory that insect wings evolved in water.
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