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Thijs Versloot

Magnetic bubble may give space probes a soft landing - 4 views

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    I am also looking into this idea since some time and it seems NASA is already ahead, awarding two contract to investigate magnetoshell aerocapture. This could be interesting for probes that want to enter eg Marsian atmospheres at relatively high velocity. Or for multiple re-entry s/c at Earth. The idea of the experiment, The satellite will carry a copper coil, powered by a lithium-ion battery, that generates a magnetic field around the probe. As it descends, the spacecraft will eject a small amount of plasma. This gets trapped in the magnetic field, creating a protective bubble that stops air molecules colliding with the craft and producing heat.
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    A few years back Mimmo has worked on this, rather from the theory side if I remember well ...
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    The power requirements for such a thing must be HUGE!
Nina Nadine Ridder

Earth's extremes point the way to extraterrestrial life - 1 views

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    Seems a little speculative but pretty interesting thoughts. In regards to terraforming Mars this might be of interest: "During the daytime, plant-like microorganisms on a Martian-like surface could photosynthesize hydrogen peroxide. At night, when the atmosphere is relatively humid, they could use their stored hydrogen peroxide to scavenge water from the atmosphere, similar to how microbial communities in the Atacama use the moisture that salt brine extracts from the air to stay alive."
jcunha

Portable ultra-broadband lasers could be key to next-generation sensors - 0 views

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    Quantum Cascade Lasers are rising in the mid-infrared region, the so-called fingerprint zone of the electromagnetic spectrum for a whole bunch of chemical species that we are most of times interested in sensing. One more sign of the underlying importance of this technology comes just by seeing NSF, USHS, Naval Air Command and NASA as the main monetary contributors to this research.
Juxi Leitner

Asteroid Response System in Place (Complete With U.S. Military Eye Patch) - 1 views

  • However, the US air force, which funded the development of the telescope, requires that software automatically black out a swathe of pixels to hide the trajectories of passing satellites.
Tobias Seidl

Wombats detected from space - 4 views

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    Demonstrates how useful space technology can be.
  • ...4 more comments...
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    Also, this reminds me of a poem that once sprung out on my Linux console login: The wombat lives across the seas, Among the far Antipodes. He may exist on nuts and berries, Or then again, on missionaries; His distant habitat precludes Conclusive knowledge of his moods, But I would not engage the wombat In any form of mortal combat.
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    sprung out of your console????? my mac never talks like this to me ....
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    See? Even console can be user-friendly ;-) If I remember well, it was Slackware linux and at every console start-up the fortune program was launched : http://linux.die.net/man/6/fortune
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    so you are still not convinced about macs being superior after working for a year with martin?
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    Apparently not - I just got a brand new sexy Sony Vaio S :-)
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    I am sorry for you ... :-)
Tobias Seidl

ScienceDirect - Remote Sensing of Environment : Wombats detected from space - 1 views

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    How useful space technology can be for real scientific problems.
Juxi Leitner

The Associated Press: Launch set for US satellite to monitor space junk - 0 views

  • It's designed to give the Air Force its first full-time, space-based surveillance of satellites and debris in Earth's orbit. It monitors them for possible collisions.
Nicholas Lan

hilarious publications list - 2 views

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    his day to day research experience must be relatively unusual highlights include: - Bust size and hitchhiking: a field study. http://www.ncbi.nlm.nih.gov/pubmed/18380130 'The effect of a joke on tipping when it is delivered at the same time as the bill' http://nicolas.gueguen.free.fr/Articles/JASP2002.pdf "Love is in the air": Effects of Songs With Romantic Lyrics on Compliance to a Courtship Request. http://nicolas.gueguen.free.fr/Articles/PsyMusic2010.PDF and the mostly confusing 'Presence of Various Figurines on a Restaurant Table and Consumer Choice: Evidence for an Associative Link.'
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    Now that's what I call applied science... will consider applying to his lab for a post-doc!
Joris _

Robot mini space shuttle is go for April, says US air force * The Register - 2 views

  • concept of operations development for reusable space vehicle technologies.
  • a robotic spaceplane able to remain in orbit for substantial periods before re-entering the atmosphere and coming in for a runway landing automatically
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    make you wonder when the FLPP will actually lead to something flying !
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    I did not even know that the airforce continued the X37 project when it was cancelled at NASA ... interesting stuff indeed ...
LeopoldS

Spaceflight Now | Atlas Launch Report | Air Force spaceplane is an odd bird with a twis... - 3 views

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    Juxi are you following this one? any idea on its purpose?
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    Not that I'm an expert in the field in any way, but there are two things I could think of: 1) possibility of bringing the payload back means that it can collect huge amounts of data which wouldn't be possible to be transferred via radio in reasonable time and/or you can bring back data you don't want to be intercepted by enemy 2) I remember reading somewhere that possibility of re-entry from orbit means you can strike any country without violating the airspace of the neighbouring countries. As the project is now managed by military, a purely civil purpose can be safely ruled out in my opinion.
pacome delva

Spin-out puts new spin on wind energy - 0 views

  • The future of wind energy could involve huge blades spanning half a kilometre that generate compressed air – which is then piped into giant, underwater balloons.
pacome delva

Novel negative-index metamaterial bends light 'wrong' direction - 1 views

  • the first negative index metamaterial to operate at visible frequencies
  • By engineering a metamaterial with such properties, we are opening the door to such unusual -- but potentially useful -- phenomena as superlensing (high-resolution imaging past the diffraction limit), invisibility cloaking, and the synthesis of materials index-matched to air, for potential enhancement of light collection in solar cells
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    I forwarded the link to my experimental colleagues and here is the comment from Sergei (the master himself:) "this is what Igor has been doing - an array of plasmonic nanocables. This basically works as a wire-medium slab. All their epsilon and mu are rubbish." * If Sergei is as strict as in this comment, then it IS rubbish. He's not one of the notorious complainer (as e.g. myself.) * Please DO NOT FORWARD this to anybody else, Sergei's comment is NOT FOR PUBLIC USE!
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    UPDATE: I had a short chat with Sergei and Pekka, Sergei noticed that there is an increasing number of papers on metamaterials, especially in Nature and Science, which are simply wrong, this one being an example. * The idea is based on a very well known effect of wired media. What appears to be interesting about this paper is that they manage to make an optical analogue with aparently low losses. This could be interesting. * The whole interpretation as NIM, "wrong" refraction etc. is total nonsense.
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    wow, good to know ! But for the privacy you should be aware that this is a public group, so anyone has access to our comments i think !
pacome delva

The Mysterious Molasses Markings of Pluto - 0 views

  • Pluto can get so cold, researchers believe, that its atmosphere can actually freeze and fall to the ground. If Earth's atmosphere did that, it would make a layer 30 feet thick, but Pluto has less to work with. When it’s on the ground, Pluto's entire blanket of air is no more than a frosty film of nitrogen and methane.
LeopoldS

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

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    not yet for space'ships' but nice biomimetic research
LeopoldS

NASA - An Answer to Green Energy Could Be in the Air - 1 views

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    Tiago rules ...
LeopoldS

Air France - A380 inaugural flight - 0 views

shared by LeopoldS on 25 Sep 09 - Cached
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    Kind of "I want to die on another Titanic"?
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    Marek - did you loose your fait in progress???
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    It's not about loosing faith in the progress... I just wonder about motivations of their potential clients - what's the point of paying a lot of money for participating in something which will turn out to be spectacular only if a disaster happens?
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