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Joris _

Spaceflight Now | Breaking News | Space agencies tackle waning plutonium stockpiles - 2 views

www.spaceflightnow.com/...09rtg

technology NRG

shared by Joris _ on 09 Jul 10 - Cached
  • For every 100 watts of heat that I've got, the best I can do is get 8 watts of electricity
  • NASA is developing an Advanced Stirling Radioisotope Generator to improve the efficiency by a factor of four
duncan barker

BBC News | SCI/TECH | 'Tractor beam' technology advances - 2 views

news.bbc.co.uk/...1310771.stm

shared by duncan barker on 16 Aug 10 - Cached
  • duncan barker on 16 Aug 10
     
    Here is the tractor beam I mentioned from fridays science coffee. At the moment its used for microscopic particles only. This could be looked into to see if it could be scaled up to deflect particles in space
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
Joris _

SPACE.com -- Railway to the Sky? NASA Ponders New Launch System - 3 views

www.space.com/...ew-nasa-technology-100914.html

space technology future

shared by Joris _ on 16 Sep 10 - No Cached
  • A team of engineers from NASA's Kennedy Space Center in Florida and some of the agency's other field centers are looking into this and other novel launch systems based on cutting-edge technologies.
  • The launch system would require some advancements of existing technologies, but it wouldn't need any brand-new technologies to work
  • Scramjet vehicles could be used as a basis for a commercial launch program
  • ...1 more annotation...
  • It's not very often you get to work on a major technology revolution
  • Juxi Leitner on 16 Sep 10
     
    I wonder if they are also working with that SCRAMSPACE initiative in Australia that was presented at ESTEC a while back...
  • Giusi Schiavone on 19 Sep 10
     
    what about a space elevator!!! quiet old concept (1895), see this link on wiki http://en.wikipedia.org/wiki/Space_elevator
pacome delva

Can Google Predict the Stock Market? - ScienceNOW - 2 views

news.sciencemag.org/...-google-predict-the-stock.html

stock_market google

shared by pacome delva on 15 Nov 10 - No Cached
  • Luís F. Simões on 15 Nov 10
     
    in related news: Twitter Mood Predicts The Stock Market "An analysis of almost 10 million tweets from 2008 shows how they can be used to predict stock market movements up to 6 days in advance" http://www.technologyreview.com/blog/arxiv/25900/ http://arxiv.org/abs/1010.3003
  • ...1 more comment...
  • LeopoldS on 16 Nov 10
     
    not overly impressive: "The Google data could not predict the weekly fluctuations in stock prices. However, the team found a strong correlation between Internet searches for a company's name and its trade volume, the total number of times the stock changed hands over a given week."
  • Francesco Biscani on 16 Nov 10
     
    Likewise, I can predict the statistical properties of white noise :-)
  • nikolas smyrlakis on 18 Nov 10
     
    the problem is that usually the google search queries and the twitter updates happen after a crisis for example. I dont really think that people all over the world suddenly realised that Lehman would collapse and started googling it like crazy before it collapsed. More likely they did it afterwards.
Luís F. Simões

The 70 Online Databases that Define Our Planet - 0 views

www.technologyreview.com/...26097

Living Earth Simulator database data modelling simulator forecast

shared by Luís F. Simões on 07 Dec 10 - No Cached
  • an ambitious European plan to simulate the entire planet. The idea is to exploit the huge amounts of data generated by financial markets, health records, social media and climate monitoring to model the planet's climate, societies and economy. The vision is that a system like this can help to understand and predict crises before they occur so that governments can take appropriate measures in advance.
  • Luís F. Simões on 07 Dec 10
     
    website of the project working on the 'Living Earth Simulator': http://www.futurict.ethz.ch/FuturICT five page summary of the FuturICT Proposal: http://www.futurict.ethz.ch/data/FuturICT-FivePageSummary.pdf
Dario Izzo

If you're going to do good science, release the computer code too!!! - 3 views

www.guardian.co.uk/...ce-climate-emails-code-release

open science

shared by Dario Izzo on 09 Feb 10 - Cached
pacome delva liked it
  • Les Hatton, an international expert in software testing resident in the Universities of Kent and Kingston, carried out an extensive analysis of several million lines of scientific code. He showed that the software had an unacceptably high level of detectable inconsistencies.
  • pacome delva on 09 Feb 10
     
    haha. this guy won't have any new friends with this article! I kind of agree but making your code public doesn't mean you are doing good science...and inversely! He takes experimental physics as a counter example but even there, some teams keep their little secrets on the details of the experiment to have a bit of advance on other labs. Research is competitive in its current state, and I think only collaborations can overcome this fact.
  • ...1 more comment...
  • Juxi Leitner on 10 Feb 10
     
    well sure competitiveness is good but to verify (and that should be the case for scientific experiments) the code should be public, it would be nice to have something like bibtex for code libraries or versions used.... :) btw I fully agree that the code should go public, I had lots of trouble reproducing (reprogramming) some papers in the past ... grr
  • Francesco Biscani on 10 Feb 10
     
    My view is that the only proper way to do scientific communication is full transparency: methodologies, tests, codes, etc. Everything else should be unacceptable. This should hold both for publicly funded science (for which there is the additional moral requirement to give back to the public domain what was produced with taxpayers' money) and privately-funded science (where the need to turn a profit should be of lesser importance than the proper application of the scientifc method).
  • Dario Izzo on 08 Nov 10
     
    Same battle we are fighting since a few years....
pacome delva

Philosophers' Imprint - 5 views

quod.lib.umich.edu/...text-idx

philosophy phy math

shared by pacome delva on 18 Jan 10 - Cached
Nicholas Lan liked it
  • pacome delva on 18 Jan 10
     
    An interesting (free) journal on philosophy, with even some article with mathematics and physics !
  • Luzi Bergamin on 18 Jan 10
     
    Reading the titles somehow reminds me of the most important webpage of the ACT: the Advanced Concepts Generator :-)
  • pacome delva on 18 Jan 10
     
    have you seen the 2 articles on canonical GR ...!
nikolas smyrlakis

mentored by the Advanced Concepts Team for Google Summer of Code 2010 - 4 views

socghop.appspot.com/...advancedconceptsteam

pagmo google summerofcode

shared by nikolas smyrlakis on 19 Mar 10 - Cached
LeopoldS liked it
  • nikolas smyrlakis on 19 Mar 10
     
    you propably already know,I post it for the twitter account and for your comments
  • ...4 more comments...
  • LeopoldS on 20 Mar 10
     
    once again one of these initiatives that came up from a situation and that would never have been possible with a top-down approach .... fantastic! and as Dario said: we are apparently where NASA still has to go with this :-)
  • Joris _ on 20 Mar 10
     
    Actually, NASA Ames did that already within the NASA Open Source Agreement in 2008 for a V&V software!
  • Joris _ on 20 Mar 10
  • LeopoldS on 20 Mar 10
     
    indeed ... you are right .... interesting project btw - they started in 1999, were in 2005 the first NASA project on Sourceforge and won several awards .... then this entry why they did not participate last year: "05/01/09: Skipping this years Google Summer-of-Code - many of you have asked why we are not participating in this years Summer of Code. The answer is that both John and Peter were too busy with other assignments to set this up in time. We will be back in 2010. At least we were able to compensate with a limited number of NASA internships to continue some of last years projects." .... but I could not find them in this years selected list - any clue?
  • LeopoldS on 20 Mar 10
     
    but in any case, according to the apple guru, Java is a dying technology, so their project might as well ...
  • Joris _ on 21 Mar 10
     
    They participate under the name "The Java Pathfinder Team" (http://babelfish.arc.nasa.gov/trac/jpf/wiki/events/soc2010). It is actually a very useful project for both education and industry (Airbus created a consortium on model checking soft, and there is a lot of research on it) As far as I know, TAS had some plans of using Java onboard spacecrafts, 2 years ago. Not sure the industry is really sensible about Jobs' opinions ;) particularly if there is no better alternative!
Joris _

Researchers Claim They Can Translate Infant Cries, But is it Just Noise? | Popular Science - 0 views

www.popsci.com/...ate-infant-cries-it-just-noise

shared by Joris _ on 22 Mar 10 - Cached
  • Joris _ on 22 Mar 10
     
    nice conclusion! Published paper: "Statistical method for classifying cries of baby based on pattern recognition of power spectrum" in Int. J. Biometrics, 2010, 2, 113-123
  • Ma Ru on 23 Mar 10
     
    This must have been a hot topic is space research during last months... well, at least within the ESA's Advanced Concepts Team ;-)
Nicholas Lan

artificial inorganic leaf (AIL) - 1 views

www.sciencedaily.com/...100325131549.htm

nrg nan bio

shared by Nicholas Lan on 29 Mar 10 - Cached
  • Nicholas Lan on 29 Mar 10
     
    bit confused about what they actually have achieved so far but sounds like it might turn out to be interesting. "The scientists first infiltrated the leaves of Anemone vitifolia -- a plant native to China -- with titanium dioxide in a two-step process. Using advanced spectroscopic techniques, the scientists were then able to confirm that the structural features in the leaf favorable for light harvesting were replicated in the new TiO2 structure. Excitingly, the AIL are eight times more active for hydrogen production than TiO2 that has not been "biotemplated" in that fashion. AILs also are more than three times as active as commercial photo-catalysts. Next, the scientists embedded nanoparticles of platinum into the leaf surface. Platinum, along with the nitrogen found naturally in the leaf, helps increase the activity of the artificial leaves by an additional factor of ten."
pacome delva

New Material: Network of 'Streets' for Light - 1 views

focus.aps.org/st14

phy metamaterials waveguides

shared by pacome delva on 19 Apr 10 - Cached
  • In recent years, researchers have created early versions of "invisibility cloaks" and advanced optical fibers by manipulating light using structures composed of tiny, repeating units. In the 9 April Physical Review Letters, a team proposes a different way to make an artificial optical material--from a network of light-guiding filaments. If such structures are practical, they could open new ways to control light in technologies ranging from high-speed telecommunication to high-resolution imaging.
Joris _

Hewlett-Packard Unveils Real-World Memristor, Chip of the Future | Popular Science - 3 views

www.popsci.com/...d-unveils-first-ever-memristor

technology electronic

shared by Joris _ on 12 Apr 10 - Cached
LeopoldS liked it
  • they allow the same device to serve as the processor and the memory
  • a memristor system would work far faster, and with far less energy, than a traditional computer.
  • Second, memristors can be much smaller than transistors.
  • ...1 more annotation...
  • Lastly, unlike transistors, which only work linearly, memristors can form three-dimensional networks
  • pacome delva on 15 Apr 10
     
    wow, looks pretty cool! I wonder what is "a ridiculous amount of memory on a chip"...? giga, tera, peta, exa, ... ?
  • Ma Ru on 15 Apr 10
     
    Looks cool indeed, but as with all those technology "breakthroughs" my enthusiasm will be limited until this actually makes it to my laptop...
  • LeopoldS on 15 Apr 10
     
    what a phrase: "this advance could increase the power and memory of computers to nearly unimaginable proportions within only a couple of years." ... sure ....
LeopoldS

The Salvinia Paradox: Superhydrophobic Surfaces with Hydrophilic Pins for Air Retention... - 2 views

www3.interscience.wiley.com/...abstract

BIO biomimetics bionics

shared by LeopoldS on 09 May 10 - No Cached
  • LeopoldS on 09 May 10
     
    not yet for space'ships' but nice biomimetic research
Juxi Leitner

Japan Plans a Moon Base by 2020, Built by Robots for Robots | Popular Science - 1 views

www.popsci.com/...-base-2020-built-robots-robots

japan robots moon base exploration

shared by Juxi Leitner on 31 May 10 - Cached
  • Those initial surveyor bots will pave the way for the construction of the unmanned moon base near the lunar south pole, which the robots will construct for themselves.
  • Even if Japan falls short of its 2020 deadline, the advances in robotics technology that could fall out of this little project could be as exciting as the moon base itself.
  • Juxi Leitner on 31 May 10
     
    More on these Japanese moon base plans... Those initial surveyor bots will pave the way for the construction of the unmanned moon base near the lunar south pole, which the robots will construct for themselves.
LeopoldS

Experimental Detection of Trinitramide, N(NO2)3 - Rahm - 2010 - Angewandte Chemie Inter... - 0 views

onlinelibrary.wiley.com/...abstract

PHY PRO propulsion space NRG

shared by LeopoldS on 09 Jan 11 - No Cached
  • LeopoldS on 09 Jan 11
     
    Dejan have a look at this ...
  • dejanpetkow on 10 Jan 11
     
    Would be nice to have some cross sections or transition probabilities for the possible transition (or decomposition) channels. But anyway, HEDM is one of the key short/mid-term topics in advanced energy, power, and/or propulsion.
LeopoldS

Magnetic Control of Tubular Catalytic Microbots for the Transport, Assembly, and Delive... - 2 views

onlinelibrary.wiley.com/...abstract

bio nan technology NRG

shared by LeopoldS on 08 Mar 11 - No Cached
  • LeopoldS on 08 Mar 11
     
    very nice paper ... 
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?
Luís F. Simões

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

www.sciencedaily.com/...110512104220.htm

control complex_networks complex networks

shared by Luís F. Simões on 13 May 11 - No Cached
Joris _ liked it
  • 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
  • LeopoldS on 14 May 11
     
    Sounds too super to be true, no?
  • ...3 more comments...
  • LeopoldS on 15 May 11
     
    cover story in the May 12 issue of Nature
  • LeopoldS on 15 May 11
     
    For each, they calculated the percentage of points that need to be controlled in order to gain control of the entire system.
  • LeopoldS on 16 May 11
  • Ma Ru on 17 May 11
     
    > 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...
  • LeopoldS on 18 May 11
     
    then I am looking forward to reading your conclusions here after you will have actually read the paper
Joris _

Let's Reconstitute Humans From Genomes Launched Into Space! and Other Ambitious Proposa... - 0 views

www.popsci.com/...military-and-public-darpa-says

technology darpa

shared by Joris _ on 17 Jun 11 - No Cached
  • Fragmented human genomes could be shipped toward the stars and reconstructed upon their arrival,
  • to spur the monumental technology advances that would be required for such a feat. So the 100-Year Starship is more like a thought experiment than a construction project.
  • “The crux, to us, is inspiration of research — not just in solving the physics-based problems. It’s across all of the domains
  • Joris _ on 17 Jun 11
     
    disruptive!
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