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pacome delva

Quantum computer takes on quantum chemistry - physicsworld.com - 1 views

physicsworld.com/...41432

phy quantum_computation

shared by pacome delva on 21 Jan 10 - Cached
  • The process is done 20 times to create a 20-bit binary number that represents the energy of the hydrogen molecule to a precision of about one part per million.
  • Aspuru-Guzik described the two-qubit calculation as a "baby step forward," and added that a 128-qubit system would be needed to work out the energy levels of a simple molecule such as water.
Francesco Biscani

Open Source Software Meets Do-It-Yourself Biology - 1 views

science.slashdot.org/...e-Meets-Do-It-Yourself-Biology

bio inf

shared by Francesco Biscani on 26 Jan 10 - Cached
  • Francesco Biscani on 26 Jan 10
     
    "As the shift to open source software continues, computational biology will become even more accessible, and even more powerful, while intellectual property and other bureaucracies continue to hobble traditional forms of research." Spot on, I'm very glad to see this happening :)
LeopoldS

http://www.eecs.umich.edu/~valeria/research/publications/DATE10RSA.pdf - 1 views

www.eecs.umich.edu/...DATE10RSA.pdf

cryptography computer INF

shared by LeopoldS on 08 Mar 10 - No Cached
  • LeopoldS on 08 Mar 10
     
    nice ... hacking a 1024-bit RSA key in 100 hours .... Francesco will like this one
pacome delva

Superconductors could simulate the brain - 2 views

physicsworld.com/...41916

superconductors brain

shared by pacome delva on 08 Mar 10 - Cached
  • who have shown how networks of artificial neurons containing two Josephson junctions would outpace more traditional computer-simulated brains by many orders of magnitude. Studying such junction-based systems could improve our understanding of long-term learning and memory along with factors that may contribute to disorders like epilepsy.
  • The existing design does not permit learning since the weighting of connections between synapses cannot be changed over time, but Segall believes that if this feature can be added then their neurons might allow a lifetime's worth of learning to be simulated in five or ten minutes. This, he adds, should help us to understand how learning changes with age and might give us clues as to how long-term disorders like Parkinson's disease develops.
  • Christos Ampatzis on 09 Mar 10
     
    What I don't get is how the measure the extent of matching: how "close", or realistic is the modelisation they achieve with different methods? And moreover, if weights cannot adapt and there are no direct connections between neurons and layers of neurons, isnt that a very arbitrary matching?
Luzi Bergamin

Physics in a Crisis - 3 views

www.rqm.ch/physics_in_a_crisis.htm

phy LHC crackpot fun

shared by Luzi Bergamin on 30 Mar 10 - Cached
  • Luzi Bergamin on 30 Mar 10
     
    Luckily I'm far away from Geneva, but this has to be said today, when the LHC starts! No, not tiny black holes will eat us (what a nonsense!), but the supernovae energy will let LHC explode!!! Pacome, I expect you to debunk this with gratest care!
  • ...2 more comments...
  • pacome delva on 30 Mar 10
     
    wtf is this! As I read this morning in the newspaper (not even a scientific one), 1 TeV is the kinetic energy of a flying mosquito... so be careful ! It seems they already sloved every thing on this website: "At the Institute for Space Quantum Physics ISQP, it was already proved in 1991-1992 that dark matter is in magnetic fields as magnetic space quantum flux." This website is the biggest source of crackpots i have seen in a long time...! (http://www.supernovae-energy.com/)
  • Ma Ru on 30 Mar 10
     
    Come on guys, this website is hilarious! "The HAITI EARTHQUAKE (...) were impossible for the Institute for Space Quantum Physics (ISQP) to compute because on one single planet was on a common line or axis with the Sun: Venus."
  • Luzi Bergamin on 30 Mar 10
     
    Unfortunately, most information I have about the guy (Hans Lehner, a Swiss) is in German, his official homepage is http://www.rqm.ch/ According to EsoWatch he is the Swiss analogue to Dr. Mills and his Blacklight power. Lehner apparently founded a company, which should have produced a "Raum-Quanten-Motor" that -- of course -- produces energy out of nothing. The theory is based on spookey forces mediated by Lehneronen. 11 Million Swiss Franks (about 8 Million Euro) were lost when the company bankrupt. And the guy is selling new stocks on his homepage again... Lehner calls another crackpot named Oliver Crane Zweistein (from Einstein being "Onestone") and himself "Dreistein". Now he is looking for Mister or Misses Vierstein. Perhaps you should apply, good luck!!
  • Nicholas Lan on 30 Mar 10
     
    i like the first line of their supernovae energy technology document "Dear potential investor:"...
Juxi Leitner

Networked Networks Are Prone to Epic Failure | Wired Science | Wired.com - 1 views

www.wired.com/...networked-networks

tech networks failure

shared by Juxi Leitner on 27 Apr 10 - Cached
  • The interconnections fueled a cascading effect, with the failures coursing back and forth. A damaged node in the first network would pull down nodes in the second, which crashed nodes in the first, which brought down more in the second, and so on. And when they looked at data from a 2003 Italian power blackout, in which the electrical grid was linked to the computer network that controlled it, the patterns matched their models’ math.
  • Juxi Leitner on 27 Apr 10
     
    that would be an interesting "Systems of Systems" study for once ...
Nina Nadine Ridder

Stephen Wolfram: Computing a theory of everything | Video on TED.com - 2 views

www.ted.com/...ng_a_theory_of_everything.html

physics presentation mathematica

shared by Nina Nadine Ridder on 29 Apr 10 - Cached
  • Nina Nadine Ridder on 29 Apr 10
     
    very interesting talk by the inventor of Mathematica;  if you have 20min on you hand I recommend watching it
pacome delva

Physicists study how moral behaviour evolved - 2 views

physicsworld.com/...42540

phy ia cooperation

shared by pacome delva on 07 May 10 - Cached
  • A statistical-physics-based model may shed light on the age-old question "how can morality take root in a world where everyone is out for themselves?" Computer simulations by an international team of scientists suggest that the answer lies in how people interact with their closest neighbours rather than with the population as a whole.
  • pacome delva on 07 May 10
     
    Reminds me something... :)
  • nikolas smyrlakis on 07 May 10
     
    I check diigo for the first time since I left and my spirit is still there yeah !
Dario Izzo

New Device May Revolutionize Computer Memory - 2 views

news.ncsu.edu/...wmsfranzondfg

inf

shared by Dario Izzo on 24 Jan 11 - No Cached
  • Dario Izzo on 24 Jan 11
     
    Not a revolution, but certainly a big improvement
LeopoldS

A Biological Solution to a Fundamental Distributed Computing Problem | Science/AAAS - 3 views

www.sciencemag.org/...183.abstract

BIO science

shared by LeopoldS on 18 Jan 11 - No Cached
  • LeopoldS on 18 Jan 11
     
    .... sounds interesting
Joris _

Cosmic Log - Volunteers find another prize pulsar - 2 views

cosmiclog.msnbc.msn.com/...eers-find-another-prize-pulsar

phy pulsar @home

shared by Joris _ on 02 Mar 11 - No Cached
LeopoldS liked it
  • Joris _ on 02 Mar 11
  • LeopoldS on 05 Mar 11
     
    like the profiles ... "The clearest evidence for the pulsar's existence was provided by computers operated by two volunteers: Vitaly Shiryaev, a Russian researcher who has a Ph.D. in radio physics; and Stacey Eastham, who does vehicle testing for the British government in Darwen. In his profile, Eastham says he's studying astronomy and physics on the side. He got involved in the Einstein @ Home project because he's interested in "anything space-like, and being able to be part of something like this is right up my street."
Nicholas Lan

Betting on Green - 5 views

www.economist.com/18304172

technology economics innovation

shared by Nicholas Lan on 16 Mar 11 - No Cached
  • Nicholas Lan on 16 Mar 11
     
    breakthroughs vs. accelerated deployment in climate change mitigation technologies.
  • ...2 more comments...
  • LeopoldS on 17 Mar 11
     
    interesting guy indeed ... "Forget today's green technologies like electric cars, wind turbines, solar cells and smart grids, in other words. None meets what Mr Khosla calls the "Chindia price"-the price at which people in China and India will buy them without a subsidy. "Everything's a toy until it reaches that point," he says. I also like this one since its a bit like ACT topic selection: ""I am only interested in technologies that have a 90% chance of failure but, if they do succeed, would change the infrastructure of society in some radical way," he says." should we propose SPS to him ? :-)
  • LeopoldS on 17 Mar 11
     
    one more: ""I never compute returns. If you start forecasting cash flows, you lose innovation, you lose instinct. You average yourself down to mediocrity." "I've had many more failures than successes in my life," admits Mr Khosla. "My willingness to fail gives me the ability to succeed."
  • Nicholas Lan on 17 Mar 11
     
    indeed. puts me in mind of the often reinvented private ACT idea. actually there's a bunch of interesting looking articles on his website. http://www.khoslaventures.com/khosla/papers.html . No sps in the solar one as far as i can tell :) found this bit intriguing too in that, albeit presumably out of context, it doesn't make sense ""The solution to our energy problems is almost the exact opposite of what Khosla says," declares Joseph Romm, who is the editor of Climate Progress, an influential climate blog, and a senior fellow at the Centre for American Progress Action Fund, a think-tank. "Technology breakthroughs are unlikely to be the answer. Accelerated deployment of existing technologies will get you down the cost curve much more rapidly than a breakthrough."" found this seemingly not very well considered piece (to be fair a blog post) by the guy http://climateprogress.org/2010/07/02/is-anyone-more-incoherent-than-vinod-khosla/ . maybe he's written some more convincing stuff in this vein somewhere.
  • Ma Ru on 25 Apr 11
     
    "Mr Khosla (...) is investing over $1 billion of his clients' money in black swans" Well, with his own money his approach might be a little different :-)
Luís F. Simões

How to Grow a Mind: Statistics, Structure, and Abstraction - 4 views

www.sciencemag.org/...1279

AI cognition learning Bayesian probabilistic probabilistic computing

shared by Luís F. Simões on 21 Mar 11 - No Cached
  • Luís F. Simões on 21 Mar 11
     
    a nice review on the wonders of Hierarchical Bayesian models. It cites a paper on probabilistic programming languages that might be relevant given our recent discussions. At Hippo's farewell lunch there was a discussion on how kids are able to learn something as complex as language from a limited amount of observations, while Machine Learning algorithms no matter how many millions of instances you throw at them, don't learn beyond some point. If that subject interested you, you might like this paper.
  • Ma Ru on 21 Mar 11
     
    Had an opportunity to listen to JBT and TLG during one summer school.. if they're half as good in writing as they are in speaking, should be a decent read...
Luís F. Simões

Shell energy scenarios to 2050 - 6 views

www.shell.com/...shell_energy_scenarios_2050

energy future forecast politics economy climate_change

shared by Luís F. Simões on 09 Mar 11 - No Cached
  • Luís F. Simões on 09 Mar 11
     
    just in case you were feeling happy and optimistic
  • ...7 more comments...
  • Francesco Biscani on 09 Mar 11
     
    An energy scenario published by an oil company? Allow me to be sceptical...
  • Joris _ on 10 Mar 11
     
    Indeed, Shell is an energy company, not just oil, for some time now ... The two scenarii are, in their approach, dependant of economic and political situation, which is right now impossible to forecast. Reference to Kyoto is surprising, almost out-dated! But overall, I find it rather optimistic at some stages, and probably the timeline (p37-39) is unlikely with recent events.
  • Luís F. Simões on 10 Mar 11
     
    the report was published in 2008, which explains the reference to Kyoto, as the follow-up to it was much more uncertain at that point. The Blueprint scenario is indeed optimistic, but also quite unlikely I'd say. I don't see humanity suddenly becoming so wise and coordinated. Sadly, I see something closer to the Scramble scenario as much more likely to occur.
  • LeopoldS on 12 Mar 11
     
    not an oil company??? please have a look at the percentage of their revenues coming from oil and gas and then compare this with all their other energy activities together and you will see very quickly that it is only window dressing ... they are an oil and gas company ... and nothing more
  • Joris _ on 14 Mar 11
     
    not JUST oil. From a description: "Shell is a global group of energy and petrochemical companies." Of course revenues coming from oil are the biggest, the investment turnover on other energy sources is small for now. Knowing that most of their revenues is from an expendable source, to guarantee their future, they invest elsewhere. They have invested >1b$ in renewable energy, including biofuels. They had the largest wind power business among so-called "oil" companies. Oil only defines what they do "best". As a comparison, some time ago, Apple were selling only computers and now they sell phones. But I would not say Apple is just a phone company.
  • LeopoldS on 14 Mar 11
     
    window dressing only ... e.g. Net cash from operating activities (pre-tax) in 2008: 70 Billion$ net income in 2008: 26 Billion revenues in 2008: 88 Billion Their investments and revenues in renewables don't even show up in their annual financial reports since probably they are under the heading of "marketing" which is already 1.7 Billion $ ... this is what they report on their investments: Capital investment, portfolio actions and business development Capital investment in 2009 was $24 billion. This represents a 26% decrease from 2008, which included over $8 billion in acquisitions, primarily relating to Duvernay Oil Corp. Capital investment included exploration expenditure of $4.5 billion (2008: $11.0 billion). In Abu Dhabi, Shell signed an agreement with Abu Dhabi National Oil Company to extend the GASCO joint venture for a further 20 years. In Australia, Shell and its partners took the final investment decision (FID) for the Gorgon LNG project (Shell share 25%). Gorgon will supply global gas markets to at least 2050, with a capacity of 15 million tonnes (100% basis) of LNG per year and a major carbon capture and storage scheme. Shell has announced a front-end engineering and design study for a floating LNG (FLNG) project, with the potential to deploy these facilities at the Prelude offshore gas discovery in Australia (Shell share 100%). In Australia, Shell confirmed that it has accepted Woodside Petroleum Ltd.'s entitlement offer of new shares at a total cost of $0.8 billion, maintaining its 34.27% share in the company; $0.4 billion was paid in 2009 with the remainder paid in 2010. In Bolivia and Brazil, Shell sold its share in a gas pipeline and in a thermoelectric power plant and its related assets for a total of around $100 million. In Canada, the Government of Alberta and the national government jointly announced their intent to contribute $0.8 billion of funding towards the Quest carbon capture and sequestration project. Quest, which is at the f
  • Joris _ on 14 Mar 11
     
    thanks for the info :) They still have their 50% share in the wind farm in Noordzee (you can see it from ESTEC on a clear day). Look for Shell International Renewables, other subsidiaries and joint-ventures. I guess, the report is about the oil branch. http://sustainabilityreport.shell.com/2009/servicepages/downloads/files/all_shell_sr09.pdf http://www.noordzeewind.nl/
  • LeopoldS on 16 Mar 11
     
    no - its about Shell globally - all Shell .. these participations are just peanuts please read the intro of the CEO in the pdf you linked to: he does not even mention renewables! their entire sustainability strategy is about oil and gas - just making it (look) nicer and environmentally friendlier
  • Joris _ on 16 Mar 11
     
    Fair enough, for me even peanuts are worthy and I am not able to judge. Not all big-profit companies, like Shell, are evil :( Look in the pdf what is in the upstream and downstream you mentionned above. Non-shell sources for examples and more objectivity: http://www.nuon.com/company/Innovative-projects/noordzeewind.jsp http://www.e-energymarket.com/news/single-news/article/ferrari-tops-bahrain-gp-using-shell-biofuel.html thanks.
Luís F. Simões

Coding for Outer Space - A Programming Contest | Google Lunar X PRIZE - 1 views

www.googlelunarxprize.org/...er-space-a-programming-contest

programming competition

shared by Luís F. Simões on 24 May 11 - No Cached
LeopoldS and Joris _ liked it
  • This weekend, programmers from all over Europe will be gearing up to compete in the 5'th Catalysts Coding Coding Contest (CCC'11). This year, the theme is Astronautics.
  • The competition is also open to online participants.
  • Individuals or teams of up to three people will be given a series of challenging problems that must be solved as quickly as possible.
  • ...2 more annotations...
  • As a contestant, you must conceive of a proper solution and produce the correct output in order to advance to the next level. How you get there is completely up to you. You may use any computational means at your disposal.
  • Online contestants will not be eligible for prizes – they compete for glory alone.
  • LeopoldS on 25 May 11
     
    who is interested in following this a bit closer?
Luzi Bergamin

FuturICT: FuturIcT - 2 views

www.futurict.ethz.ch/FuturICT

AI computer SciFi socology

shared by Luzi Bergamin on 01 Jun 11 - No Cached
  • Luzi Bergamin on 01 Jun 11
     
    FuturICT, another of these nonsense-flagships. Marek: after having read about this, I understand that BlueBrain is not the only flagship proposal that sucks. Long live the dream of cybernetics, or, apparently people never learn anything...
  • Ma Ru on 01 Jun 11
     
    The others: http://www.ga-project.eu/ - "Guardian Angels for a Smarter Planet" http://www.humanbrainproject.eu/ http://www.itfom.eu/ http://www.robotcompanions.eu/ One doesn't have a website (graphene). The message from their presentation was more or less: everyone else does intensive research in this and the Europe should not stay behind. Full list of flagship proposals including short descriptions here: http://www.fet11.eu/about/fet-flagships
Dario Izzo

Black Holes play drums - 8 views

www.jannalevin.com/science.html

shared by Dario Izzo on 08 Jun 11 - No Cached
  • Dario Izzo on 08 Jun 11
     
    Another great presentation at this conference!! Plus I always wanted to enter the numerical computations of orbit around black holes.... with Luzi we had a project on formation flying around black holes .... revolutionary idea (of course we did not do it!!!)
  • ...1 more comment...
  • Ma Ru on 08 Jun 11
     
    formation flying around black holes... so practical...
  • pacome delva on 08 Jun 11
     
    nice movie, and song :) we should definitely implement GR orbits in pagmo !
  • Dario Izzo on 08 Jun 11
     
    I agree Marek, yet was it practical for Apollonio to study conic sections more than 1500 years before Kepler found his three laws? And here is a good paper to start with: http://prd.aps.org/abstract/PRD/v77/i10/e103005, making an analogy between the periodic table and the taxomony of all orbits around a black hole.
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