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Giusi Schiavone

Telomerase reactivation reverses tissue degeneration in aged telomerase-deficient mice ... - 0 views

www.nature.com/...nature09603.html

tissue degeneration

shared by Giusi Schiavone on 16 Dec 10 - No Cached
  • Nature | Letter Previous article Next article Telomerase reactivation reverses tissue degeneratio
Friederike Sontag

Retooling the ocean conveyor belt - 1 views

www.sciencedaily.com/...100618102646.htm

ocean_circulation

shared by Friederike Sontag on 23 Jun 10 - Cached
  • Climate Ecosystems Reference Ocean current Atmospheric circulation Gulf Stream Mid-ocean ridge In a paper in the June 18 issue of Science, a Duke University oceanographer reviews the growing body of evidence that suggests it's time to rethink the conveyor belt model. "The old model is no longer valid for the ocean's overturning, not because it's a gross simplification, but because it i
  • Friederike Sontag on 23 Jun 10
     
    "The old model is no longer valid for the ocean's overturning, not because it's a gross simplification, but because it ignores crucial elements such as eddies and the wind field. The concept of a conveyor belt for the overturning was developed decades ago, before oceanographers had measured the eddy field of the ocean and before they understood how energy from the wind impacts the overturning,"
Luís F. Simões

The Amazing Trajectories of Life-Bearing Meteorites from Earth - Technology Review - 0 views

www.technologyreview.com/...27720

BIO life meteorite microbes

shared by Luís F. Simões on 11 Apr 12 - No Cached
  • That raises another interesting question: how quickly could life-bearing ejecta from Earth (or anywhere else) seed the entire galaxy? Hara and co calculate that it would take some 10^12 years for ejecta to spread through a volume of space the size of the Milky Way. But since our galaxy is only 10^10 years old, a single ejection event could not have done the trick. However, they say that if life evolved at 25 different sites in the galaxy 10^10 years ago, then the combined ejecta from these places would now fill the Milky Way.
  • Ref: arxiv.org/abs/1204.1719: Transfer of Life-Bearing Meteorites from Earth to Other Planets
Francesco Biscani

Expert panel urges NASA to revive futuristic think tank - space - 07 August 2009 - New ... - 0 views

www.newscientist.com/...dn17568

shared by Francesco Biscani on 09 Aug 09 - Cached
  • NASA should revive its Institute for Advanced Concepts, a blue-skies idea mill that closed in 2007, says an expert panel – but it says the new incarnation should have its feet a little closer to the ground.
  • Francesco Biscani on 09 Aug 09
     
    NASA should revive its own ACT, expert panel says.
Luís F. Simões

NASA Goddard to Auction off Patents for Automated Software Code Generation - 0 views

www.spaceref.com/...viewpr.html

nasa patents software fault-tolerance design swarm

shared by Luís F. Simões on 04 Nov 10 - No Cached
  • The technology was originally developed to handle coding of control code for spacecraft swarms, but it is broadly applicable to any commercial application where rule-based systems development is used.
  • Luís F. Simões on 04 Nov 10
     
    This is related to the "Verified Software" item in NewScientist's list of ideas that will change science. At the link below you'll find the text of the patents being auctioned: http://icapoceantomo.com/item-for-sale/exclusive-license-related-improved-methodology-formally-developing-control-systems :) Patent #7,627,538 ("Swarm autonomic agents with self-destruct capability") makes for quite an interesting read: "This invention relates generally to artificial intelligence and, more particularly, to architecture for collective interactions between autonomous entities." "In some embodiments, an evolvable synthetic neural system is operably coupled to one or more evolvable synthetic neural systems in a hierarchy." "In yet another aspect, an autonomous nanotechnology swarm may comprise a plurality of workers composed of self-similar autonomic components that are arranged to perform individual tasks in furtherance of a desired objective." "In still yet another aspect, a process to construct an environment to satisfy increasingly demanding external requirements may include instantiating an embryonic evolvable neural interface and evolving the embryonic evolvable neural interface towards complex complete connectivity." "In some embodiments, NBF 500 also includes genetic algorithms (GA) 504 at each interface between autonomic components. The GAs 504 may modify the intra-ENI 202 to satisfy requirements of the SALs 502 during learning, task execution or impairment of other subsystems."
pacome delva

Physics - Atoms in a lattice keep time - 0 views

physics.aps.org/...PhysRevLett.103.063001

phy metrology atomic_clocks atom_interferometry

shared by pacome delva on 05 Aug 09 - Cached
  • If your wristwatch was as accurate as today’s atomic clocks, it would not gain or lose a second in 80 million years.
  • The NIST group traps and cools neutral 171Yb atoms and loads them into a one-dimensional lattice, so that about 30,000 atoms fill several hundred lattice sites.
  • Lemke et al. compare their optical lattice clock with the current standard atomic fountain clock and find that the accuracy of the Yb lattice clock potentially challenges the current standard.
pacome delva

[1107.5728] The network of global corporate control - 1 views

arxiv.org/1107.5728

economics social_network

shared by pacome delva on 28 Nov 11 - No Cached
  • Abstract: The structure of the control network of transnational corporations affects global market competition and financial stability. So far, only small national samples were studied and there was no appropriate methodology to assess control globally. We present the first investigation of the architecture of the international ownership network, along with the computation of the control held by each global player. We find that transnational corporations form a giant bow-tie structure and that a large portion of control flows to a small tightly-knit core of financial institutions. This core can be seen as an economic "super-entity" that raises new important issues both for researchers and policy makers.
ESA ACT

PUTTING PSYCHOLOGY INTO BEHAVIORAL ECONOMICS - Edge: EDGE MASTER CLASS 2008-CLASS 6 - 0 views

www.edge.org/...class6.html

psychology social sociology network

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    maybe of interest to Nikolaos? have to admit that I did not read it entirely ....
Luís F. Simões

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

www.technologyreview.com/...26589

pioneer anomaly PHY astrophysics

shared by Luís F. Simões on 31 Mar 11 - No Cached
Nicholas Lan liked it
  • 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
  • santecarloni on 01 Apr 11
     
    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?
  • Luís F. Simões on 26 Jul 11
     
    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.""
Luís F. Simões

Why Is It So Hard to Predict the Future? - The Atlantic - 1 views

www.theatlantic.com/...588040

future forecast innovation collaboration

shared by Luís F. Simões on 29 Nov 20 - No Cached
LeopoldS liked it
  • The Peculiar Blindness of Experts Credentialed authorities are comically bad at predicting the future. But reliable forecasting is possible.
  • The result: The experts were, by and large, horrific forecasters. Their areas of specialty, years of experience, and (for some) access to classified information made no difference. They were bad at short-term forecasting and bad at long-term forecasting. They were bad at forecasting in every domain. When experts declared that future events were impossible or nearly impossible, 15 percent of them occurred nonetheless. When they declared events to be a sure thing, more than one-quarter of them failed to transpire. As the Danish proverb warns, “It is difficult to make predictions, especially about the future.”
  • Tetlock and Mellers found that not only were the best forecasters foxy as individuals, but they tended to have qualities that made them particularly effective collaborators. They were “curious about, well, really everything,” as one of the top forecasters told me. They crossed disciplines, and viewed their teammates as sources for learning, rather than peers to be convinced. When those foxes were later grouped into much smaller teams—12 members each—they became even more accurate. They outperformed—by a lot—a group of experienced intelligence analysts with access to classified data.
  • ...1 more annotation...
  • This article is adapted from David Epstein’s book Range: Why Generalists Triumph in a Specialized World.
LeopoldS

Three-body Gallery - 2 views

suki.ipb.ac.rs/3body

PHY mathematics

shared by LeopoldS on 10 Mar 13 - No Cached
  • LeopoldS on 10 Mar 13
     
    loads of new solution classes to the three body problem found by Bulgarians ... Francesco and Sante, you will love these
  • LeopoldS on 10 Mar 13
     
    ups, should have looked at diigo before ... Luis was faster again
johannessimon81

A New Class of Faint Supernova - 0 views

news.sciencemag.org/...shot-a-new-class-of-super.html

space PHY science

shared by johannessimon81 on 27 Mar 13 - No Cached
  • johannessimon81 on 27 Mar 13
     
    The type is much weaker than normal supernovas and seems to have a new mechanism underlying it.
Luís F. Simões

Our approach to replication in computational science - 2 views

ivory.idyll.org/...replication-i

science research publications open science

shared by Luís F. Simões on 13 Apr 12 - No Cached
  • So what did we do to make this paper extra super replicable? If you go to the paper Web site, you'll find:
  • p.s. I think I have to refer to this cancer results not reproducible paper somewhere. Done.
  • Luís F. Simões on 13 Apr 12
     
    good discussion on the replicability/reproducibility of scientific results (also a nice example of how to do it right... in bioinformatics at least)
Luís F. Simões

NASA Turns to 3D Printing for Self-Building Spacecraft | Space.com - 4 views

www.space.com/sa-spacecraft-3d-printing.html

cubesat 3D printing NIAC

shared by Luís F. Simões on 17 Sep 12 - No Cached
LeopoldS liked it
  • SpiderFab Concept CREDIT: Unlimited Tethers
  • Luís F. Simões on 17 Sep 12
     
    CubeSats + 3D printing... for space. I'm surprised this isn't an ACT project :) more info: SpiderFab: Process for On-Orbit Construction of Kilometer-Scale Apertures
  • Dario Izzo on 18 Sep 12
     
    $100,000 from NASA's Innovative Advanced Concepts program to hammer out a design and figure out whether spacecraft self-construction makes business sense .... I can answer for 0$ ..... NO Infact the question is just stupid: a) spacecraft self-construction exist: then it is a no brainer to decide wether it makes business sense b) it does not: then there is no business
santecarloni

New 2D semiconductor could outperform silicon - physicsworld.com - 1 views

physicsworld.com/...47787

semiconductor Phy science

shared by santecarloni on 18 Nov 11 - No Cached
  • santecarloni on 18 Nov 11
     
    A new class of 2D semiconductor has been developed by researchers in the US. The free-standing quantum membranes, which are made of indium arsenide (InAs) and are just a few layers thick, have properties that are in stark contrast to the semiconductor layers used in conventional transistors.
nikolas smyrlakis

Michael O'Leary at the Innovation Convention 2011 - Brussels - YouTube - 2 views

www.youtube.com/watch

innovation brussels ryanair

shared by nikolas smyrlakis on 05 Mar 12 - No Cached
LeopoldS liked it
  • nikolas smyrlakis on 05 Mar 12
     
    very debatable but surely different and entertaining - Master Class with Michael O'Leary at the Innovation Convention 2011 - Brussels
nikolas smyrlakis

BBC News - European space missions given cost warning - 1 views

news.bbc.co.uk/...8389906.stm

missions cosmic vision ESA space

shared by nikolas smyrlakis on 04 Dec 09 - Cached
  • nikolas smyrlakis on 04 Dec 09
     
    Cosmic Vision missions, some of which to be selected before the end of 2011.. Favorite phrase: "Mindful of the recent criticism the agency has received from member states on the issue of cost overruns, Professor David Southwood, Esa's director of science and robotics, told the teams: "Industry and the science community need to get to work on this; it's a collective responsibility."" :-> reference class forecasting!
Luís F. Simões

SETI, Citrus Division - 1 views

www.newscientist.com/...cted-at-kinetica-art-fair.html

SETI fun

shared by Luís F. Simões on 07 Feb 11 - No Cached
  • A nice contrast to these high-tech installations, Adrian Lee's Search for Extra-Terrestrial Intelligence (SETI) Citrus Division (below), sees 65 lemons trying to communicate with aliens. Using their own juices, these lemon batteries power a small motor - which turns a disc into which is punched the Morse code for "We are here". As the disc rotates, a class 2 laser - also powered by the lemons - shines through the holes and the encoded message is then directed by a small mirror up into space...or in this case, onto the ceiling of the Ambica P3 venue. Amusing, simple and sophisticated all at once, the Citrus Division mixes old and new science and technology in just the right measure.
Luís F. Simões

Pattern | CLiPS - 2 views

www.clips.ua.ac.be/pattern

AI language text data mining web Python

shared by Luís F. Simões on 02 Mar 11 - No Cached
  • Pattern is a web mining module for the Python programming language. It bundles tools for data retrieval (Google + Twitter + Wikipedia API, web spider, HTML DOM parser), text analysis (rule-based shallow parser, WordNet interface, syntactical + semantical n-gram search algorithm, tf-idf + cosine similarity + LSA metrics) and data visualization (graph networks).
  • Luís F. Simões on 02 Mar 11
     
    Intuitive, well documented, and very powerful. A library to keep an eye on. Check the example Belgian elections, June 13, 2010 - Twitter opinion mining
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