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Nicholas Lan

Chavez says capitalism may have ended life on Mars - 4 views

www.reuters.com/...vez-mars-idUSTRE72L61D20110322

fun

shared by Nicholas Lan on 23 Mar 11 - No Cached
  • Nicholas Lan on 23 Mar 11
     
    i assume he was being ironic. otherwise it's an obvious future ariadna
  • pacome delva on 29 Mar 11
     
    hahaha !!! Venezuela should team up with the US to send a robot to Mars to look for some bank vestiges :))
Marion Nachon

Observation : this month, four planets aligned in the early morning sky. - 9 views

This month, some 30 minutes before the sunrise, look to the East, and if the sky is not too cloudy you will see Mercure, Venus, Mars and Jupiter very close, so close that it will be possible to hid...

http:__ciencia.nasa.gov_ciencias-especiales_09may_morningplanets_ space

started by Marion Nachon on 11 May 11 no follow-up yet
LeopoldS liked it
Luzi Bergamin

[1107.0167] Nonlinear transformation optics and engineering of the Kerr effect - 9 views

arxiv.org/1107.0167

PHY nan optics metamaterials

shared by Luzi Bergamin on 04 Jul 11 - No Cached
LeopoldS liked it
  • Luzi Bergamin on 04 Jul 11
     
    The best paper on transformation optics written ever :-)
  • ...2 more comments...
  • jmlloren on 05 Jul 11
     
    Finally something worth to read in the MM field!. The idea is excellent, congratullations. However, I think there is a typo or mistake in the definition of l=3x10-13 m, the "waist" of the laser beam. Seems clear that 0.3 pm is too small for being a waist of any laser beam.
  • Luzi Bergamin on 05 Jul 11
     
    Thanks for your commendation. Of course, the problem with nonlinear transformation optics is the same as with linear: it's very easy to come up with theoretical descriptions of devices that have the most absurd properties, but it will be extremely hard to fabricate them. But if you have any good suggestion, please shoot! About the laser beam: Pekka made the simulations, since I am not a "Comsolist", but still I think the numbers are correct. You are right that we should not call this a laser beam. Our problem was the following: we need to have a very simple model that can be simulated exactly (full Maxwell equations) but naturally exhibits self focusing. The Gaussian beam was the simplest solution. Since our model is purely classical and moreover we do not take into account diffraction effects, the parameter "l" is of minor importance. Taking "l" much larger gives almost the same picture but requires much more computer power to simulate. I guess that's why Pekka chose an unnaturally small number.
  • jmlloren on 05 Jul 11
     
    Concerning the fabrication... as usual, no idea. I agree that this is the main drawback of MM, and certainly difficult to overcome. I would double check that number, because its value is related with the beam shape of Fig. 1 A. I believe that the simulations are correct, it's just a detail.
  • LeopoldS on 06 Jul 11
     
    wow ... still publishing despite babysitting and new job!!
Joris _

ATV docks with the ISS | Bad Astronomy | Discover Magazine - 4 views

blogs.discovermagazine.com/...atv-docks-with-the-iss

ESA MAD

shared by Joris _ on 12 Apr 12 - No Cached
LeopoldS and Ma Ru liked it
  • Joris _ on 12 Apr 12
     
    On March 28, ATV-3, named Edoardo Amaldi, docked with the ISS. Astronauts on the station took this unbelievable picture of it as it approached
  • Ma Ru on 12 Apr 12
     
    More pics here: http://www.flickr.com/photos/europeanspaceagency/ ATV docking is a bit further down the photostream.
Joris _

video of the short hop test flight - 4 views

www.blueorigin.com/...o-of-the-short-hop-flight.html

rocket mad propulsion

shared by Joris _ on 09 May 12 - No Cached
  • Joris _ on 09 May 12
     
    Have you seen this?!
  • LeopoldS on 11 May 12
     
    no! quite impressive indeed! thanks for sharing it here
Dario Izzo

Past Future Predictions - 3 views

www.ethologic.com/...pastpred.txt

futurology forecast technology forecast

shared by Dario Izzo on 07 Dec 09 - Cached
  • Dario Izzo on 07 Dec 09
     
    "Computers in the future may weigh no more than 1.5 tons." Underoptimistic ... Excellent source of inspiration and quotation for all our reports
  • LeopoldS on 08 Dec 09
     
    put them on the wiki ....
  • Francesco Biscani on 10 Dec 09
     
    "Computers in the future may weigh no more than 1.5 tons." Technically, this is a correct prediction :P
Joris _

Earth's atmosphere came from outer space, find scientists - 3 views

www.physorg.com/news179676765.html

climate research space

shared by Joris _ on 11 Dec 09 - Cached
  • From that we now know that the volcanic gases could not have contributed in any significant way to the Earth's atmosphere
  • LeopoldS on 11 Dec 09
     
    tried to find the original science paper but could not .... the only one I found was this one: http://sciencenow.sciencemag.org/cgi/content/full/2009/1210/2
  • ...1 more comment...
  • Nina Nadine Ridder on 11 Dec 09
  • nikolas smyrlakis on 14 Dec 09
     
    "Plan 9 from outer space" quote confirmed : atmospheric conditions in outer space stall communications! Wonder how many more facts of the movie will prove right in the end...
  • pacome delva on 14 Dec 09
     
    very interesting study. Although it is not so much a surprise, they cite many papers on planetary formation that predicted this, and the only paper on degassing they cite is from our rather unpopular french ex-minister of research c. allegre, who refuses the fact that humans have an impact on climate...
Juxi Leitner

Mission Idea Contest - 3 views

www.axelspace.com/...index.html

mission mad fun science space prizes

shared by Juxi Leitner on 05 Jul 10 - Cached
LeopoldS and Joris _ liked it
  • Juxi Leitner on 05 Jul 10
     
    so any ideas from us here?! :)
  • ...1 more comment...
  • LeopoldS on 05 Jul 10
     
    fantastic - they launched it! he mentioned this already some time ago ... I really like it.
  • LeopoldS on 05 Jul 10
     
    btw: have been discussing something similar with Roger ... a bit less ambitious but still ...
  • Juxi Leitner on 06 Jul 10
     
    presentations from the related nanosatellite event http://www.nestra.jp/NS_sympo/information_e.html (DLR, SSTL and european unis were there but no ESA...)
Ma Ru

The quantum mechanics of time travel through post-selected teleportation - 3 views

arxiv.org/1007.2615

PHY time travel science

shared by Ma Ru on 26 Jul 10 - Cached
  • Ma Ru on 26 Jul 10
     
    Giving the title, I think the comment is not necessary...
  • pacome delva on 27 Jul 10
     
    Haha, nice article : One of the best-known versions of non-general relativistic quantum versions of time travel comes from Wheeler, as described by Feynman in his Nobel Prize lecture [16]: 'I received a telephone call one day at the graduate college at Princeton from Professor Wheeler, in which he said, "Feynman, I know why all electrons have the same charge and the same mass." "Why?" "Because, they are all the same electron!" And, then he explained on the telephone, "Suppose that the world lines which we were ordinarily considering before in time and space - instead of only going up in time were a tremendous knot, and then, when we cut through the knot, by the plane corresponding to a fixed time, we would see many, many world lines and that would represent many electrons, except for one thing. If in one section this is an ordinary electron world line, in the section in which it reversed itself and is coming back from the future we have the wrong sign to the proper time - to the proper four velocities - and that's equivalent to changing the sign of the charge, and, therefore, that part of a path would act like a positron."
Juxi Leitner

Sea Swarm - 3 views

senseable.mit.edu/seaswarm

swarm technology oil spill cleanup autonomous robots

shared by Juxi Leitner on 05 Sep 10 - Cached
  • Juxi Leitner on 05 Sep 10
     
    nice idea and very nice video ;) using applied swarms
santecarloni

Astronomy Picture of the Day - 7 views

antwrp.gsfc.nasa.gov/...astropix.html

astronomy photos science space

shared by santecarloni on 15 Dec 10 - Cached
  • santecarloni on 15 Dec 10
     
    wow...
Dario Izzo

JHelioviewer - 7 views

www.jhelioviewer.org

open source

shared by Dario Izzo on 13 Jan 11 - No Cached
  • Dario Izzo on 13 Jan 11
     
    OPen SOurce developed entirely in ESA
Christos Ampatzis

WikiLeaks: Galileo satnav system called 'stupid idea' - 7 views

www.telegraph.co.uk/...system-called-stupid-idea.html

shared by Christos Ampatzis on 14 Jan 11 - No Cached
Dario Izzo liked it
  • Christos Ampatzis on 14 Jan 11
     
    oops
  • Dario Izzo on 14 Jan 11
     
    German honesty!!
Francesco Biscani

Lonely Planet's top 10 countries for 2011 - 7 views

www.lonelyplanet.com/...76164

fun

shared by Francesco Biscani on 16 Jan 11 - No Cached
Juxi Leitner liked it
  • Francesco Biscani on 16 Jan 11
     
    Albania is Lonely Planet's top country to visit in 2011. Ah! The ACT confirms its ability to detect trends and to be ahead of the curve.
Tobias Seidl

Structure and formation of ant transportation networks - Interface - 3 views

rsif.royalsocietypublishing.org/...rsif.2010.0612.abstract

ant network transportation organisation bio

shared by Tobias Seidl on 03 Feb 11 - No Cached
  • Tobias Seidl on 03 Feb 11
     
    You guys could like this....
Dario Izzo

Google's 8-Point Plan to Help Managers Improve - 7 views

www.nytimes.com/...13hire.html

CMS INF

shared by Dario Izzo on 16 Mar 11 - No Cached
LeopoldS liked it
  • Dario Izzo on 16 Mar 11
     
    Well, well, Google says it. And all is a result of an algorithm..... Among the interesting fincings the algorithm says that technical competence of the boss is not needed..... against their own beliefs!!
  • ...3 more comments...
  • LeopoldS on 16 Mar 11
     
    "Although people are always looking for the next new thing in leadership," he said, "Google's data suggest that not much has changed in terms of what makes for an effective leader."
  • nikolas smyrlakis on 16 Mar 11
     
    "Managers often want to hire people who seem just like them" does the ACT look like the managers or the managers like the ACT ? hmmm
  • Ma Ru on 16 Mar 11
     
    "the topic often feels a bit like golf" What other comparison can one use in an article aimed towards managers? :D
  • LeopoldS on 17 Mar 11
     
    nobody in the ACT plays golf yet as far as I know ...
  • Ma Ru on 17 Mar 11
     
    Which is a pity as you have a golf field not that far away :-D Maybe a good idea for a nice team building event??
Ian Carnelli

Quadrocopter Ball Juggling - 3 views

www.youtube.com/watch

quadrocopter AI

shared by Ian Carnelli on 01 Apr 11 - No Cached
LeopoldS and Joris _ liked it
  • Ian Carnelli on 01 Apr 11
     
    probably not very new but certainly impressive!
  • Joris _ on 03 Apr 11
Ma Ru

An Inflationary Differential Evolution Algorithm for Space Trajectory Optimization - 7 views

ieeexplore.ieee.org/...abs_all.jsp

space trajectory optimization differential evolution PaGMO INF

shared by Ma Ru on 21 Apr 11 - No Cached
LeopoldS liked it
  • Ma Ru on 21 Apr 11
     
    I was so shocked not to see Dario in the authors list!
  • LeopoldS on 22 Apr 11
     
    still practically as an ACT paper ... the first author was the first RF of the team and the one who suggested Dario ...
  • Ma Ru on 22 Apr 11
     
    Yeah I've figured it out from his CV at the end of the article after posting :)
nikolas smyrlakis

Resource Efficiency: The Sixth Wave of Innovation | Epicenter | Wired.com - 7 views

www.wired.com/...sixth-wave-of-innovation

shared by nikolas smyrlakis on 05 Jun 11 - No Cached
LeopoldS liked it
  • nikolas smyrlakis on 05 Jun 11
     
    well not many new things here but an interesting point of view
Tobias Seidl

WikiCFP : Call For Papers of Conferences, Workshops and Journals - 3 views

www.wikicfp.com/cfp

conferences call

shared by Tobias Seidl on 17 Jun 11 - No Cached
LeopoldS and Dario Izzo liked it
  • Tobias Seidl on 17 Jun 11
     
    This is my first post to the ACT-Diigo in 18 months! Anyways a semantic wiki which collects calls for papers on all different fields - that should have been an ACT invention. SHAME ON YOU!!!
  • LeopoldS on 19 Jun 11
     
    nice!
  • Ma Ru on 20 Jun 11
     
    Come on guys, it's out there for centuries...
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