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Joris _

NASA Developing Tech to Reach and Colonize Other Worlds | Gadget Lab | Wired.com - 4 views

www.wired.com/...each-and-colonize-other-worlds

technology space future

shared by Joris _ on 20 Oct 10 - No Cached
  • The most important near-term development is electric propulsion.
  • using high-density batteries powered off ground-based solar grids
  • microwave thermal propulsion
  • LeopoldS on 20 Oct 10
     
    "Within a few years we will see the first true prototype of a spaceship that will take us between worlds," Worden said. this sounds to me a bit too much like Pete Worden :-) but I really like this one :-) One of those billionaires might be Google's Larry Page, who is keenly interested in space travel and NASA Ames's research. "Larry asked me a couple weeks ago how much it would cost to send people one way to Mars and I told him $10 billion, and his response was, 'Can you get it down to 1 or 2 billion?,'" Worden told the Long Now audience. "So now we're starting to get a little argument over the price."
LeopoldS

Comparison of Two GaN Transistor Technologies in Broadband Power Amplifiers  ... - 1 views

www.mwjournal.com/...article.asp

technology NRG wireless WPT

shared by LeopoldS on 10 Oct 10 - No Cached
  • LeopoldS on 10 Oct 10
     
    interesting paper for wireless energy transmission ... Duncan have a look ...
  • duncan barker on 11 Oct 10
     
    Yeah, its nice to see some research into semiconductors which aren't silicon. This paper would be useful for us if we wanted to do a study of the efficiency of the DC to microwave conversion systems for SPS.
Luís F. Simões

Russia To Spend 2 Bln Dollars For Space Clean-Up - 1 views

www.spacedaily.com/...rs_For_Space_Clean_Up_999.html

debris removal nuclear

shared by Luís F. Simões on 26 Nov 10 - No Cached
LeopoldS liked it
  • "The corporation promised to clean up the space in ten years by collecting about 600 defunct satellites on the same geosynchronous orbit and sinking them into the ocean subsequently,"
  • He said the cleaning satellite would work on nuclear power and be capable to work up to 15 years.
  • Energia said that the company would complete the cleaning satellite work-out and assembly by 2020 and test the device no later than in 2023.
  • Ma Ru on 27 Nov 10
     
    Hehe... as far as I know the Russians, they won't miss a chance to "clean up" a few enemy satellites too...
Luís F. Simões

heat shields: NASA's Orion capsule vs. SpaceX's Dragon capsule - 0 views

neil.fraser.name/09

re-entry shielding design optimization spacex nasa

shared by Luís F. Simões on 11 Dec 10 - No Cached
  • NASA has 50 years of experience with reentry capsules, but is fearful of trying something new. SpaceX has no reentry experience and chooses the most efficient engineering approach. Guess whose capsule is overweight and still sitting on the ground? Guess whose capsule completed a successful first flight yesterday?
  • Dario Izzo on 12 Dec 10
     
    Powerful contrast between the two pictures!!
nikolas smyrlakis

The Future Of Energy? Bloom Energy Boxes Already Power Google, eBay, Others - 0 views

techcrunch.com/...bloom-energy-boxes

future of energy bloom oxygen

shared by nikolas smyrlakis on 22 Feb 10 - Cached
  • nikolas smyrlakis on 22 Feb 10
     
    just another fuel cell?the vid is interesting
Juxi Leitner

Powering cube satellites - 5 views

web.mit.edu/...cubesat-01115.html

cubesat propulsion

shared by Juxi Leitner on 01 Mar 10 - Cached
  • duncan barker on 15 Oct 10
     
    nice!
LeopoldS

Common ecology quantifies human insurgency : Article : Nature - 0 views

www.nature.com/...nature08631.html

modelling war defence

shared by LeopoldS on 07 Jan 10 - Cached
  • LeopoldS on 07 Jan 10
     
    nice paper: like especially: To our knowledge, our model provides the first unified explanation of high-frequency, intra-conflict data across human insurgencies. Other explanations of human insurgency are possible, though any competing theory would also need to replicate the results of Figs 1, 2, 3. Our model's specific mechanisms challenge traditional ideas of insurgency based on rigid hierarchies and networks, whereas its striking similarity to multi-agent financial market models24, 25, 26 hints at a possible link between collective human dynamics in violent and non-violent settings1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19. Top of page
  • pacome delva on 07 Jan 10
     
    There was also this paper ... Power Law Explains Insurgent Violence (http://sciencenow.sciencemag.org/cgi/content/full/2009/1216/1?rss=1)
pacome delva

Accurate light-time correction due to a gravitating mass - 1 views

fr.arxiv.org/0912.2705

phy general_relativity time_transfer

shared by pacome delva on 15 Dec 09 - Cached
  • The Orbit Determination Program (ODP) of NASA's Jet Propulsion Laboratory, which was used in the data analysis, is based on an expression for the gravitational delay which differs from the standard formula; this difference is of second order in powers of $m$ -- the sun's gravitational radius -- but in Cassini's case it was much larger than the expected order of magnitude $m^2/b$, where $b$ is the ray's closest approach distance. Since the ODP does not account for any other second-order terms, it is necessary, also in view of future more accurate experiments, to systematically evaluate higher order corrections and to determine which terms are significant.
  • pacome delva on 15 Dec 09
     
    Some other crazy guys interested in high precision measurement of time of flight...
pacome delva

Power Law Explains Insurgent Violence - 1 views

sciencenow.sciencemag.org/...1

war power_law

shared by pacome delva on 18 Dec 09 - Cached
  • To try to explain the mechanism behind these patterns, the team borrowed a simple computer model from economics. The model treated all insurgencies like a marketplace--groups of people constantly deciding whether to act. Rather than coordinating, the groups simply watch the news. The size of the carnage reported at any given time determines the probability that a group of a given size will strike next. Like clockwork, the attacks over the course of the conflict--from the smallest to the most deadly--have the same distribution.
LeopoldS

Solar Plant in Space Gets Go-Ahead - Green Inc. Blog - NYTimes.com - 2 views

greeninc.blogs.nytimes.com/...r-plant-in-space-gets-go-ahead

SPS NRG solar power

shared by LeopoldS on 06 Dec 09 - Cached
  • LeopoldS on 06 Dec 09
     
    here we go - a quite significant step in getting SPS off the ground !!
nikolas smyrlakis

Europe's Ambitious 'Green Grid' Plan - BusinessWeek - 2 views

www.businessweek.com/...gb2010017_256132.htm

smartgrid renewable energy north sea

shared by nikolas smyrlakis on 08 Jan 10 - Cached
  • nikolas smyrlakis on 08 Jan 10
     
    The cables would link existing and new windmills off the German and British coasts with Belgian and Danish tidal power stations and Norwegian hydroelectric plants. The €30-billion project would compensate for the irregular nature of renewable energy and provide a steady flow to the countries involved.
Luzi Bergamin

Power scattering and absorption mediated by cloak/anti-cloak interactions: A transforma... - 1 views

arxiv.org/1001.3000

phy nan metamaterials

shared by Luzi Bergamin on 20 Jan 10 - Cached
LeopoldS liked it
  • Luzi Bergamin on 20 Jan 10
     
    To keep you updated in the field of metamaterials. "Invisible sensors" are a hot topic at the moment. Of course, mainly due to military applications. Might be interesting to sense something while minimizing the perturbations due to the sensor.
  • Dario Izzo on 20 Jan 10
     
    And all seems to be allowed by transformation optics ..... mah
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 :)
Francesco Biscani

Proof of Martians 'to come this year': Scientific American - 0 views

www.scientificamerican.com/article.cfm

bio

shared by Francesco Biscani on 15 Jan 10 - Cached
  • David McKay, chief of astrobiology at NASA's Johnson Space Centre in Houston, says powerful new microscopes and other instruments will establish whether features in martian meteorites are alien fossils.
Joris _

NASA could buy plasma engine for station reboost services - 1 views

www.flightglobal.com/...-station-reboost-services.html

nasa MAD low thrust

shared by Joris _ on 10 Mar 10 - Cached
  • enough to generate 1lb of thrust (0.00445kN) and fulfil the critical role of giving the Space Station a periodic altitude boost.
  • the most powerful electric engine in operation toda
  • , NASA is contracting Ad Astra Rocket for a lunar tug concept study, to take cargo from the Earth to the Moon and back, and deliver equipment in preparation for a human landing
pacome delva

Enter the 'thermopower wave' - 0 views

physicsworld.com/...41978

carbon_nanotubes nan power_sources nrg

shared by pacome delva on 16 Mar 10 - Cached
  • Researchers in the US and Korea have discovered that igniting a carbon nanotube, coated in chemically flammable material, can trigger a high-speed wave to race along the tube at 10,000× the speed of the spreading chemical reaction. The new phenomenon, dubbed a "thermopower wave", could lead to a new way of generating electricity and may enable micro power sources to drive nanoscale devices.
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 ;-)
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:"...
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