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Expedition Week | Mars: Making the New Earth | National Geographic Channel - 3 views

channel.nationalgeographic.com/...Overview

terraforming Mars

shared by Nina Nadine Ridder on 16 Nov 09 - Cached

Nina Nadine Ridder on 16 Nov 09

announcement of broadcast of documentation about Terraforming Mars on the 19th of November (with nice videos)

<div class="cArrow"> </div><div class="cContentInner">announcement of broadcast of documentation about Terraforming Mars on the 19th of November (with nice videos)</div>

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Ma Ru on 16 Nov 09

Please give the title of at least one Sci-fi novel in which terraforming was mentioned ;)

<div class="cArrow"> </div><div class="cContentInner">Please give the title of at least one Sci-fi novel in which terraforming was mentioned ;)</div>

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Dark Matter or Black Hole Propulsion? - 1 views

www.newscientist.com/...s-for-interstellar-travel.html

NRG propulsion star travel space PHY

shared by Ma Ru on 25 Nov 09 - Cached

Ma Ru on 25 Nov 09

Anyone out there still doing propulsion stuff? Two more papers just waiting to get busted... http://arxiv.org/abs/0908.1429v1 http://arxiv.org/abs/0908.1803

<div class="cArrow"> </div><div class="cContentInner">Anyone out there still doing propulsion stuff? Two more papers just waiting to get busted... <a href="http://arxiv.org/abs/0908.1429v1" rel="nofollow" target="_blank">http://arxiv.org/abs/0908.1429v1</a> <a href="http://arxiv.org/abs/0908.1803" rel="nofollow" target="_blank">http://arxiv.org/abs/0908.1803</a></div>

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...5 more comments...
Luzi Bergamin on 26 Nov 09

What an awful bunch of complete nonsense!!! But I don't think anybody wants to hear MY opinion on this...

<div class="cArrow"> </div><div class="cContentInner">What an awful bunch of complete nonsense!!! But I don't think anybody wants to hear MY opinion on this...</div>

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pacome delva on 26 Nov 09

wow, is this serious at all...!?

<div class="cArrow"> </div><div class="cContentInner">wow, is this serious at all...!?</div>

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Luzi Bergamin on 26 Nov 09

Are you joking?? The BH drive propses a BH with a lifetime of about an year, just 10^7 tons, peanuts!! Then you have to produce it, better not on Earth, so you do this in space, with a laser that produces an equivalent of 10^9 tons highly foucussed, even more peanuts!! Reasonable losses in the production process (probably 99,999%) are not yet taken into account. Engineering problems... :-) The DM drive is even better, they want to collect DM and compress it in a propulsion chamber. Very easy to collect and compress a gas of particles that traverse the Earth without any interaction. Perhaps if the walls of the chamber are made of artificial BHs?? Who knows??

<div class="cArrow"> </div><div class="cContentInner">Are you joking?? The BH drive propses a BH with a lifetime of about an year, just 10^7 tons, peanuts!! Then you have to produce it, better not on Earth, so you do this in space, with a laser that produces an equivalent of 10^9 tons highly foucussed, even more peanuts!! Reasonable losses in the production process (probably 99,999%) are not yet taken into account. Engineering problems... :-) The DM drive is even better, they want to collect DM and compress it in a propulsion chamber. Very easy to collect and compress a gas of particles that traverse the Earth without any interaction. Perhaps if the walls of the chamber are made of artificial BHs?? Who knows??</div>

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LeopoldS on 26 Nov 09

WRONG!!! we are all just WAITING for your opinion on this ....!!!

<div class="cArrow"> </div><div class="cContentInner">WRONG!!! we are all just WAITING for your opinion on this ....!!!</div>

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pacome delva on 27 Nov 09

well, yes my remark was ironic... I'm surprised they did a magazine on these concepts...! But the press is always waiting for sensational. They do not even wait for the work to be peer-reviewed now to make an article on it ! This is one of the bad sides of arxiv in my opinion. It's like a journalist that make an article with a copy-paste in wikipedia ! Anyway, this is of course complete bullsh..., and I would have laughed if I had read this in a sci-fi book... but in a "serious" article i'm crying... For the DM i do not agree with your remark Luzi. It's not dark energy they want to use. The DM is baryonic, it's dark just because it's cold so we don't see it by usual means. If you believe the in the standard model of cosmology, then the DM should be somewhere around the galaxies. But it's of course not uniformly distributed, so a DM engine would work (if at all...) only in the periphery of galaxies. It's already impossible to get there...

<div class="cArrow"> </div><div class="cContentInner">well, yes my remark was ironic... I'm surprised they did a magazine on these concepts...! But the press is always waiting for sensational. They do not even wait for the work to be peer-reviewed now to make an article on it ! This is one of the bad sides of arxiv in my opinion. It's like a journalist that make an article with a copy-paste in wikipedia ! Anyway, this is of course complete bullsh..., and I would have laughed if I had read this in a sci-fi book... but in a "serious" article i'm crying... For the DM i do not agree with your remark Luzi. It's not dark energy they want to use. The DM is baryonic, it's dark just because it's cold so we don't see it by usual means. If you believe the in the standard model of cosmology, then the DM should be somewhere around the galaxies. But it's of course not uniformly distributed, so a DM engine would work (if at all...) only in the periphery of galaxies. It's already impossible to get there...</div>

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Luzi Bergamin on 27 Nov 09

One reply to Pacome, though the discussion exceeds by far the relevance of the topic already. Baryonic DM is strictly limited by cosomology, if one believes in these models, of course. Anyway, even though most DM is cold, we are constantly bombarded by some DM particles that come together with cosmic radiation, solar wind etc. etc. If DM easily interacted with normal matter, we would have found it long ago. In the paper they consider DM as neutralinos, which are neither baryonic nor strongly or electromagnetically interacting.

<div class="cArrow"> </div><div class="cContentInner">One reply to Pacome, though the discussion exceeds by far the relevance of the topic already. Baryonic DM is strictly limited by cosomology, if one believes in these models, of course. Anyway, even though most DM is cold, we are constantly bombarded by some DM particles that come together with cosmic radiation, solar wind etc. etc. If DM easily interacted with normal matter, we would have found it long ago. In the paper they consider DM as neutralinos, which are neither baryonic nor strongly or electromagnetically interacting.</div>

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pacome delva on 27 Nov 09

well then I agree, how the fu.. they want to collect them !!!

<div class="cArrow"> </div><div class="cContentInner">well then I agree, how the fu.. they want to collect them !!!</div>

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When will sci-fi tech become real? Sooner than you think - CNN.com - 3 views

edition.cnn.com/...science.fiction.kaku

shared by nikolas smyrlakis on 27 Mar 11 - No Cached

nikolas smyrlakis on 27 Mar 11

some -not so crazy- predictions

<div class="cArrow"> </div><div class="cContentInner">some -not so crazy- predictions</div>

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Dissolving the Fermi Paradox - the search for extra-terrestrial intelligence - 4 views

www.universal-sci.com/...ion-in-the-observable-universe

space

shared by dharmeshtailor on 25 Jun 18 - No Cached

tricepaige liked it

dharmeshtailor on 25 Jun 18

Paper: https://arxiv.org/abs/1806.02404

<div class="cArrow"> </div><div class="cContentInner">Paper: <a href="https://arxiv.org/abs/1806.02404" rel="nofollow" target="_blank">https://arxiv.org/abs/1806.02404</a></div>

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Quantum Computing Test Offers Boost to Quantum Cryptography - 1 views

www.quantamagazine.org/ever-be-able-to-solve-20180621

Comp.Sci. INF

shared by jaihobah on 22 Jun 18 - No Cached

Marcus Maertens and tricepaige liked it

jaihobah on 22 Jun 18

Computer scientists have been searching for years for a type of problem that a quantum computer can solve but that any possible future classical computer cannot. Now they've found one.

<div class="cArrow"> </div><div class="cContentInner">Computer scientists have been searching for years for a type of problem that a quantum computer can solve but that any possible future classical computer cannot. Now they've found one.</div>

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Marcus Maertens on 25 Jun 18

Oh this is a big one! Unfortunately, the problem is only relativized (i.e. you need an oracle for it) but nevertheless an impressive result.

<div class="cArrow"> </div><div class="cContentInner">Oh this is a big one! Unfortunately, the problem is only relativized (i.e. you need an oracle for it) but nevertheless an impressive result.</div>

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The New Science of Seeing Around Corners - 3 views

www.quantamagazine.org/seeing-around-corners-20180830

PHY Comp.Sci

shared by jaihobah on 30 Aug 18 - No Cached

Dario Izzo liked it

jaihobah on 30 Aug 18

Computer vision researchers have uncovered a world of visual signals hiding in our midst, including subtle motions that betray what's being said and faint images of what's around a corner.

<div class="cArrow"> </div><div class="cContentInner">Computer vision researchers have uncovered a world of visual signals hiding in our midst, including subtle motions that betray what's being said and faint images of what's around a corner.</div>

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Doctor-blade deposition of quantum dots onto standard window glass for low-loss large-a... - 1 views

www.nature.com.sci-hub.bz/...nenergy2016157

PHY NAN quantum dots window energy nature

shared by jaihobah on 12 Oct 16 - No Cached

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