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Joris _

A Singularity Approach to Space: Beamed Propulsion, AI, and Iridium on Steroids | Parab... - 8 views

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    you know what? if you exclude the title it is not so much bullshit! "Send a robot out into space - allow people to experience space via a virtual environment" I have always loved this idea!
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    do you want to add some of that to the humanoids in space acta futura article?
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    I looked at the wiki input on this, but I don't know what I should do. Aren't you writing the article. I definitely think there are some stuffs to pick up on the list and develop further.
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    yeah i do but input is always more than welcome =)
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    "I have always loved this idea!" - me too!!!
Joris _

The seeds of disruptive innovation within the European Space Agency - 24 August 2010 > ... - 5 views

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    :p
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    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? :)
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    So nice to hear Dario again! :-) But apparently UoS needs someone a bit more skilled to handle these videos...
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    Only one self-comment alla Barney ..... suit-up
Joris _

SPACE.com -- Space Beer Headed for Zero Gravity Bar - 0 views

  • It may not come in time for Oktoberfest, but the world's first beer to be certified for consumption in space will soon undergo tests in weightlessness to see if it is brewed with the right stuff.
andreiaries

SPACE.com -- Space Dragon Soars! Photos From SpaceX's First Space Capsule Demo Flight - 0 views

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    They look set to replicate project Mercury. At the same costs too. Wonder if they will send any chimps first :).
Nina Nadine Ridder

Koreans plan space tours - Cosmic Log - msnbc.com - 0 views

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    XCOR Aerospace and Yecheon Astro Space Center plan regular tours to edge of outer space; first flight expected in 2012-2013
Francesco Biscani

The End Of Gravity As a Fundamental Force - 6 views

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    "At a symposium at the Dutch Spinoza-instituut on 8 December, 2009, string theorist Erik Verlinde introduced a theory that derives Newton's classical mechanics. In his theory, gravity exists because of a difference in concentration of information in the empty space between two masses and its surroundings. He does not consider gravity as fundamental, but as an emergent phenomenon that arises from a deeper microscropic reality. A relativistic extension of his argument leads directly to Einstein's equations."
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    Diffcult for me to fully understand / believe in the holographic principle at macroscopical scales ... potentially it looks though as a revolutionary idea.....
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    never heard about it... seems interesting. At first sight it seems that it is based on fundamental principle that could lead to a new phenomenology, so that could be tested. Perhaps Luzi knows more about this ? Did we ever work on this concept ?
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    The paper is quite long and I don't have the time right now to read it in detail. Just a few comments: * We (ACT) definitely never did anything in this direction? But: is there a new phenomenology? I'm not sure, if the aim is just to get Einstein's theory as emergent theory, then GR should not change (or only change in extreme conditions.) * Emergent gravity is not new, also Erik admits that. The claim to have found a solution appears quite frequently, but most proposals actually are not emergent at all. At least, I have the impression that Erik is aware of the relevant steps to be performed. * It's very difficult to judge from a short glance at the paper, up to which point the claims are serious and where it just starts to be advertisments. Section 6 is pretty much a collection of self-praise. * Most importantly: I don't understand how exactly space and time should be emergent. I think it's not new to observe that space is related to special canonical variables in thermodynamics. If anybody can see anything "emergent" in the first paragraphs of section 3, then please explain me. For me, this is not emergent space, but space introduced with a "sledge hammer." Time anyway seems to be a precondition, else there is nothing like energy and nothing like dynamics. * Finally, holography appears to be a precondition, to my knowledge no proof exists that normal (non-supersymmetric, non-stringy, non-whatever) GR has a holographic dual.
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    Update: meanwhile I understood roughly what this should be about. It's well known that BH physics follow the laws of theormodynamics, suggesting the existence of underlying microstates. But if this is true, shouldn't the gravitational force then be emergent from these microstates in the same way as any theromdynamical effect is emergent from the behavior of its constituents (e.g. a gas)? If this can be prooven, then indeed gravity is emergent. Problem: one has to proof that *any* configuration in GR may be interpreted as thermodynamical, not just BHs. That's probably where holography comes into the play. To me this smells pretty much like N=4 SYM vs. QCD. The former is not QCD, but can be solved, so all stringy people study just that one and claim to learn something about QCD. Here, we look at holographic models, GR is not holographic, but who cares... Engineering problems...
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    is there any experimental or observational evidence that points to this "solution"?
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    Are you joking??? :D
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    I was a bit fast to say it could be tested... apparently we don't even know a theory that is holographic, perhaps a string theory (see http://arxiv.org/abs/hep-th/9409089v2). So very far from any test...
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    Luzi, I miss you!!!
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    Leo, do you mean you liked my comment on your question more than Pacome's? Well, the ACT has to evolve and fledge, so no bullshitting anymore, but serious and calculating answers... :-) Sorry Pacome, nothing against you!! I just LOVE this Diigo because it gives me the opportunity for a happy revival of my ACT mood.
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    haha, today would have been great to show your mood... we had a talk on the connection between mind and matter !!
Nina Nadine Ridder

Europe offers space station as platform for climate science - Technology News - SINA E... - 0 views

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    The European Space Agency is looking at proposals for using the International Space Station as a platform for climate science, ESA Director General Jean-Jacques Dordain said on Thursday.
Joris _

SPACE.com -- NASA to Boost Speed of Deep Space Communications - 1 views

  • a few megabits per second might someday get as much as 600 megabits per second, if not more. That could enable far more scientific payoff per mission in the long run.
  • new communication innovations such as disruption tolerant networking
  • one of the biggest communication revolutions will come from laser-driven optical communication
    • Joris _
       
      they kind-of stole my idea ;)
Luís F. Simões

The Space Age, as recorded on human written history - 4 views

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    Google Books measurements of word frequencies on 15 million books (12% of all the books ever published). More about it in:  - Google Opens Books to New Cultural Studies - John Bohannon, Science 2010-12-17 - Slashdot: Google Books Makes a Word Cloud of Human History - http://ngrams.googlelabs.com/info
Luís F. Simões

Boeing probes international market for human spacecraft - 1 views

  • The aerospace powerhouse is designing and testing systems for its CST-100 space capsule, a craft the company says could begin flying astronauts to low Earth orbit by 2015. It will launch on existing rockets to lessen development risk and costs.
  • "The spacecraft that we're designing is rocket-agnostic. It would be possible to sell this like a commercial airplane to countries who perhaps have a launch vehicle who would like to launch it in their own country."
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    ...and hitting the news in the same day: A Rocket Built from U.S. and European Parts "A new rocket that would combine parts from NASA's canceled Ares I rocket as well as the Ariane 5 , a well-proven European satellite launcher, could provide a low-cost option for taking crew and cargo to the space station. The rocket proposal was announced this week by ATK, an aerospace and defense company that manufactures the solid rocket motors for NASA's space shuttles, and Astrium, the European company that makes the Ariane 5. They say the rocket, called Liberty, would be ready for flight by 2015." "Other commercial companies, including Boeing and Orbital Sciences Corporation, are looking to use low-end versions of the Atlas V to carry the capsules they are building. Liberty could carry any capsule at a cost less than that of the Atlas V, according to ATK." Look! Competition! :)
Luís F. Simões

USSR Wins Space Race As U.S. Shuts Down Shuttle Program | The Onion - America's Finest ... - 4 views

  • The termination of NASA's space shuttle program marks the end of a nearly 54-year rivalry between the USSR and the United States to achieve superiority in space exploration.
  • Sources confirmed that in commemoration of the capitalist defeat, extra bread and corn rations had been approved in all major cities, and factory workers were given time off their nine-hour work shifts to join in the festivities.
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    we can't access it from within the firewall I fear ...
Ma Ru

more space tourism - 3 views

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    Russian space hotel, but alcohol banned on board... something's not right here...
Francesco Biscani

DIRECT - Wikipedia, the free encyclopedia - 0 views

  • DIRECT is a proposed alternative Shuttle-Derived Launch Vehicle architecture supporting NASA's Vision for Space Exploration, which would replace the space agency's planned Ares I and Ares V rockets with a family of launch vehicles named "Jupiter."
  • DIRECT is advocated by a group of space enthusiasts that asserts it represents a broader team of dozens of NASA and space industry engineers who actively work on the proposal on an anonymous, volunteer basis in their spare time.
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    Just read about this, it looks like an interesting example of bottom-up innovation and self-organization.
jmlloren

Experimental verification of the feasibility of a quantum channel between space and Earth - 0 views

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    Extending quantum communication to space environments would enable us to perform fundamental experiments on quantum physics as well as applications of quantum information at planetary and interplanetary scales. Here, we report on the first experimental study of the conditions for the implementation of the single-photon exchange between a satellite and an Earth-based station. We built an experiment that mimics a single photon source on a satellite, exploiting the telescope at the Matera Laser Ranging Observatory of the Italian Space Agency to detect the transmitted photons. Weak laser pulses, emitted by the ground-based station, are directed toward a satellite equipped with cube-corner retroreflectors. These reflect a small portion of the pulse, with an average of less-than-one photon per pulse directed to our receiver, as required for faint-pulse quantum communication. We were able to detect returns from satellite Ajisai, a low-Earth orbit geodetic satellite, whose orbit has a perigee height of 1485 km.
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    hello Jose! Interesting it was proposed to do the same with the ISS as part of the ACES experiment. I don't remember the paper but i can look if you're interested
Friederike Sontag

Inflatable tower could climb to the edge of space - 0 views

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    Old concept revisited - previously known as the Tower of Babel ;)
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    Now seriously - do you think this concept is more feasible than the tether-based space elevator? What about winds for instance?
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    what about tags...?
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    Alternative to space elevator!!
ESA ACT

NASA cuts funding to private spaceship developer - space - 18 October 2007 - New Scient... - 0 views

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    remains an ambitious programme, renewed competition in space tourism as a result?
ESA ACT

Gallery of NSS Space Settlement Art Contest - 0 views

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    The following images have been accepted by the NSS Space Settlement Calendar Committee as entries in the NSS Space Settlement 2009 Calendar Art Contest.
ESA ACT

Ride a Maglev Rocket to space - 0 views

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    They planned to use a Maglev rocket to ride to space
Joris _

A Fusion Thruster for Space Travel - IEEE Spectrum - 4 views

  • Now a NASA engineer has come up with a new way to fling satellites through space on mere grams of fuel, tens of times as efficiently as today’s best space probe thrusters.
  • Instead of using deuterium and tritium as the fuel stocks, the new motor extracts energy from boron fuel.
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    "And according to his calculations, improvements in short-pulse laser systems could make this form of thruster more than 40 times as efficient as even the best of today's ionic propulsion systems that push spacecraft around. "
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    Dejan please have a look at this also ...
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    while the nuclear reaction seems to be sound at first view, I am not so sure how this would work: "Electromagnetic forces push the target and the alpha particles in the opposite directions, and the particles exit the spacecraft through a nozzle, providing the vehicle's thrust. "
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