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pacome delva

An evil atmosphere is forming around geoengineering - 0 views

www.newscientist.com/...ing-around-geoengineering.html

climate_change geoengineering climato_sceptics

shared by pacome delva on 22 Jul 10 - Cached
  • A number of right-wing think tanks actively denying climate change are also promoting geoengineering, an irony that seems to escape them.
  • Wood believes that climate engineering is inevitable. In a statement that could serve as Earth's epitaph, he declared: "We've engineered every other environment we live in, why not the planet?"
  • It's estimated that if whoever controls the scheme decided to stop, the greenhouse gases that would have built up could cause warming to rebound at a rate 10 to 20 times that of the recent past - a phenomenon referred to, apparently without irony, as the "termination problem".
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."
Tobias Seidl

Wombats detected from space - 4 views

dx.doi.org/...0034-4257(80)90046-2

BIO AIR remote sensing

shared by Tobias Seidl on 03 Aug 10 - No Cached
  • Tobias Seidl on 03 Aug 10
     
    Demonstrates how useful space technology can be.
  • ...4 more comments...
  • Ma Ru on 03 Aug 10
     
    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.
  • LeopoldS on 04 Aug 10
     
    sprung out of your console????? my mac never talks like this to me ....
  • Ma Ru on 05 Aug 10
     
    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
  • LeopoldS on 07 Aug 10
     
    so you are still not convinced about macs being superior after working for a year with martin?
  • Ma Ru on 07 Aug 10
     
    Apparently not - I just got a brand new sexy Sony Vaio S :-)
  • LeopoldS on 09 Aug 10
     
    I am sorry for you ... :-)
duncan barker

ESA Proves General Theory of Relativity Wrong???? - 3 views

refreshingnews9.blogspot.com/...hat-proves-general-theory.html

science space

shared by duncan barker on 12 Aug 10 - Cached
  • Luzi Bergamin on 12 Aug 10
     
    Not again, pleeeaaase!!! Alright, you don't know the story, ask Dario or Leo...
  • LeopoldS on 12 Aug 10
     
    he just did .... don't worry, it's already over again .... how are you btw?
Juxi Leitner

Send To Dropbox - Email files to your Dropbox! - 2 views

sendtodropbox.com

internet technology INF dropbox tools

shared by Juxi Leitner on 12 Aug 10 - Cached
LeopoldS liked it
  • Juxi Leitner on 12 Aug 10
     
    for the dropbox users.. in case you e.g. would like to add things behind restrictive firewalls to your dropbox shared drives
  • LeopoldS on 12 Aug 10
     
    are they going to see the content of all my dropbox after the authorisation process this requires?
  • Juxi Leitner on 12 Aug 10
     
    I dunno but it would be nice if you could give permission to specific folders ... dunno how the API handles it...
Joris _

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

www.parabolicarc.com/...ed-propulsion-iridium-steroids

technology

shared by Joris _ on 31 Aug 10 - Cached
Juxi Leitner liked it
  • Christos Ampatzis on 01 Sep 10
     
    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!
  • ...2 more comments...
  • Juxi Leitner on 05 Sep 10
     
    do you want to add some of that to the humanoids in space acta futura article?
  • Joris _ on 06 Sep 10
     
    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.
  • Juxi Leitner on 06 Sep 10
     
    yeah i do but input is always more than welcome =)
  • LeopoldS on 07 Sep 10
     
    "I have always loved this idea!" - me too!!!
Dario Izzo

Forget Brainstorming - Newsweek - 6 views

www.newsweek.com/...forget-brainstorming.html

shared by Dario Izzo on 03 Aug 10 - Cached
LeopoldS liked it
  • Dario Izzo on 03 Aug 10
     
    nice link from toby .... it contains some of the things that I have been saying to the wind!!
  • ...3 more comments...
  • Francesco Biscani on 03 Aug 10
     
    Oh god, this is so beautiful... I'm not even going to quote the best parts, they are so many :)
  • LeopoldS on 04 Aug 10
     
    "employees need to be able to put their own ideas into practice" - but they also need to want to do it ....
  • LeopoldS on 04 Aug 10
     
    "In Galinsky's lab, people were more creative after watching a slide show about China: a 45-minute session increased creativity scores for a week." Hippo: we need more pictures from you!!
  • LeopoldS on 04 Aug 10
     
    "Do something only you would come up with-that none of your friends or family would think of." - according to them, this is one of their success recipes .... a recipe for the team?
  • Ma Ru on 04 Aug 10
     
    >Get moving. I always said that fitness test should be included in the recruitment process!!!
Juxi Leitner

Inside Google Books: Books of the world, stand up and be counted! All 129,864,880 of you. - 3 views

booksearch.blogspot.com/...d-stand-up-and-be-counted.html

books fun INF

shared by Juxi Leitner on 23 Aug 10 - Cached
  • After we exclude serials, we can finally count all the books in the world. There are 129,864,880 of them. At least until Sunday.
  • Juxi Leitner on 23 Aug 10
     
    interesting post on data and knowledge management ;)
Christos Ampatzis

Danish rocketeers ready to launch British dummy - 2 views

www.bbc.co.uk/...-rocketeers-are-no-dummi.shtml

space

shared by Christos Ampatzis on 01 Sep 10 - Cached
  • Christos Ampatzis on 01 Sep 10
     
    ACT RFs should be able to go on mission in one of those once a year
Giusi Schiavone

The importance of stupidity in scientific research. - 10 views

jcs.biologists.org/...1771

shared by Giusi Schiavone on 07 Sep 10 - Cached
  • Giusi Schiavone on 07 Sep 10
     
    I suggest you this easy reading ( is on a peer-reviewed scientific journal, IF = 6.14) 'We just don't know what we're doing!!!'
  • ...2 more comments...
  • LeopoldS on 08 Sep 10
     
    as a start of a peer reviewed paper this is an interesting first paragraph: "I recently saw an old friend for the first time in many years. We had been Ph.D. students at the same time, both studying science, although in different areas. She later dropped out of graduate school, went to Harvard Law School and is now a senior lawyer for a major environmental organization. At some point, the conversation turned to why she had left graduate school. To my utter astonishment, she said it was because it made her feel stupid. After a couple of years of feeling stupid every day, she was ready to do something else."
  • Ma Ru on 08 Sep 10
     
    Hilarious! Mr Schwartz, who made a PhD at Stanford(!) and apparently is working as a postdoc now, has finally discovered what science is about!!! Quote: "That's when it hit me: nobody did. That's why it was a research problem." And he seems so excited about it! I think he should not only get published in 6.14 journal, but also get the Nobel Prize immediately! Seriously, after reading something like this, how one may not have superstitions about the educational system in the US?
  • LeopoldS on 10 Sep 10
     
    I tend to agree with you but I think that you are too harsh - its still only an "essay" and one of his points of making sure that education at post graduate level is not about indoctrinating what we know already is valid ...
  • Francesco Biscani on 20 Sep 10
     
    I think this quote by Richard Horton is relevant to the discussion: "We portray peer review to the public as a quasi-sacred process that helps to make science our most objective truth teller. But we know that the system of peer review is biased, unjust, unaccountable, incomplete, easily fixed, often insulting, usually ignorant, occasionally foolish, and frequently wrong." :P
Luís F. Simões

Timelapse video of asteroid discoveries in our solar system from 1980-2010 (watch in 1080p) - 5 views

www.youtube.com/watch

asteroid detection solar system WISE

shared by Luís F. Simões on 13 Sep 10 - No Cached
Joris _ liked it
  • Ma Ru on 14 Sep 10
     
    Nice... Now I have a lame question: after you have discovered ~500k asteroids, all moving (I assume more or less) chaotically in that asteroid belt, how do you tell one from another?
  • ...1 more comment...
  • Joris _ on 14 Sep 10
     
    hmm, not very chaotic indeed - laws of Kepler plus some perturbations.
  • Ma Ru on 15 Sep 10
     
    That's what I thought but when presented as a green "goo" in the video, it appears rather unordered... so I guess this is just an impression evoked by a not-to-scale presentation?
  • Francesco Biscani on 19 Sep 10
     
    It depends... orbits can be chaotic if the orbital period is in a resonance with Jupiter, although such orbits are not stable. Such configurations tend to get disrupted pretty quickly (in cosmic terms :P) http://en.wikipedia.org/wiki/Kirkwood_gap
Ma Ru

Robots on TV: AI goes back to baby basics - 0 views

www.newscientist.com/...-goes-back-to-baby-basics.html

AI robotics Plymouth science

shared by Ma Ru on 21 Sep 10 - No Cached
  • Ma Ru on 21 Sep 10
     
    A bit of self-ad here :-) Hear my lab colleague Tony Morse speaking about developmental robotics, and meet our little iCub... As a bonus, have a peep into the kitchen and messy lab of the guys downstairs... my office is of course much nicer!!!
  • Dario Izzo on 21 Sep 10
     
    "and yet one (idea) that allowed to make new predictions that are now being tested in children"!!! Which one? I am curious.
  • Ma Ru on 22 Sep 10
     
    Will ask him today...
Luís F. Simões

Inferring individual rules from collective behavior - 2 views

dx.doi.org/...pnas.1001763107

bio swarm biomimicry self-organization

shared by Luís F. Simões on 05 Sep 10 - No Cached
  • Luís F. Simões on 05 Sep 10
     
    "We fit data to zonal interaction models and characterize which individual interaction forces suffice to explain observed spatial patterns." You can get the paper from the first author's website: http://people.stfx.ca/rlukeman/research.htm
  • Christos Ampatzis on 06 Sep 10
     
    PNAS? Didnt strike me as sth very new though... We should refer to it in the roots study though: "Social organisms form striking aggregation patterns, displaying cohesion, polarization, and collective intelligence. Determining how they do so in nature is challenging; a plethora of simulation studies displaying life-like swarm behavior lack rigorous comparison with actual data because collecting field data of sufficient quality has been a bottleneck." For roots it is NO bottleneck :) Tobias was right :)
  • Luís F. Simões on 06 Sep 10
     
    Here they assume all relevant variables influencing behaviour are being observed. Namely, the relative positions and orientations of all ducks in the swarm. So, they make movies of the swarm's movements, process them, and them fit the models to that data. In the roots, though we can observe the complete final structure, or even obtain time-lapse movies showing how that structure came out to be, getting the measurements of all relevant soil variables (nitrogen, phosphorus, ...) throughout the soil, and over time, would be extremely difficult. So I guess a replication of the kind of work they did, but for the roots, would be hard. Nice reference though.
Dario Izzo

File Compression: New Tool for Life Detection? - 4 views

www.astrobio.net/...on-new-tool-for-life-detection

life AI image compression

shared by Dario Izzo on 21 Sep 10 - No Cached
  • Dario Izzo on 21 Sep 10
     
    As mentioned today during coffee .... we could think to link this to source localization
  • ...3 more comments...
  • Ma Ru on 22 Sep 10
     
    Not sure by what you mean by source localisation, but this using gzip to discern "biological" from "non-biological" images seems to me *very* tricky... I mean, there's a lot of other factors that may affect compressibility of an image than just mere "regularity" of the pattern, and if they haven't controlled for these, this is just bullsh1t... (For instance did they use the same imaging device to take those images? What about lighting conditions and exposure? etc). The apostle of sometimes surprising uses of compression is prof. Shmidhuber from IDSIA...
  • Dario Izzo on 22 Sep 10
     
    I completely agree with you..... still if you have one instrument on board the spacecraft and your picture compressibility is a noisy indicator of some interesting source .... we could try to perform some probabilistic reasoning
  • Juxi Leitner on 24 Sep 10
     
    I think they (IDSIA-Schmidhuber) are planning on putting something about that also inside the Acta Futura paper...
  • Ma Ru on 24 Sep 10
     
    Really, you think they'd target such a low impact factor publication? ;-P
  • Dario Izzo on 26 Sep 10
     
    you will all soon be begging to publish in Acta Futura! We will be bigger than Nature.
Loretta Latronico Poulain

The biology of business: Homo administrans - 0 views

www.economist.com/17090697

science fun

shared by Loretta Latronico Poulain on 24 Sep 10 - No Cached
  • Loretta Latronico Poulain on 24 Sep 10
     
    "Richard Arvey, the head of the NUS business school's department of management and organisation, has been looking into precisely how genes interact with different types of environment to create such things as entrepreneurial zeal and the ability to lead others."...They are doing experiments with twins...I want to try with my twin!!!:))
Nicholas Lan

ignobel winners 2010 - 2 views

improbable.com/winners

fun

shared by Nicholas Lan on 14 Oct 10 - Cached
  • Nicholas Lan on 14 Oct 10
     
    cheers to luca for pointing out the management one. netlogo model "demonstrating mathematically that organizations would become more efficient if they promoted people at random."
  • ...4 more comments...
  • LeopoldS on 14 Oct 10
     
    do you trust netlogo for this? :-)
  • nikolas smyrlakis on 14 Oct 10
     
    for the ignobel or the random promotions ? :P
  • Ma Ru on 14 Oct 10
     
    Nah... Marek's recognition reward definitively goes to: "Microbiological Laboratory Hazard of Bearded Men" (...) WHO ATTENDED THE CEREMONY: Manuel S. Barbeito was unable to travel, due to health reasons. :D
  • jmlloren on 15 Oct 10
     
    The page itself should be awarded with the ugliest layout. I have suggested to our management the implementation of the random promotion. Perhaps it is the future of democracy: representatives chosen at random.
  • LeopoldS on 15 Oct 10
     
    you mean "your management" at your current place?
  • jmlloren on 15 Oct 10
     
    Yes, it is not what is written? Indeed, it is already implemented. You are talking with the director of the Institute. I have been unlucky with the toss.
Joris _

Robot's space debut 'giant leap for tinmankind' - 2 views

www.washingtonpost.com/...AR2010110103743.html

robot technology space

shared by Joris _ on 02 Nov 10 - No Cached
LeopoldS liked it
  • Joris _ on 02 Nov 10
     
    a robot Juxi talked about in a report, soon in the ISS
  • Ma Ru on 02 Nov 10
     
    They made him mute so that he can't say at some point "I'm afraid I can't do that, Barratt"...
Joris _

Is It Time To Revamp Systems Engineering? | AVIATION WEEK - 1 views

www.aviationweek.com/...story.jsp

engineering

shared by Joris _ on 02 Nov 10 - No Cached
LeopoldS liked it
  • They both believe the systems engineering processes that have served the aerospace and defense community since pre-Apollo days are no longer adequate for the large and complex systems ­industry is now developing.
  • Joris _ on 02 Nov 10
     
    1) it has to actively work and produce a result that's what you intended 2) the design must be robust. 3) it should be efficient 4) it should minimize unintended consequences. "But we have to establish a formal, mathematically precise mechanism to measure complexity and adaptability . . . [where] adaptability means the system elements have sufficient margin, and can serve multiple purposes." "We need to break the paradigm of long cycles from design to product" some interesting questions....
  • ...1 more comment...
  • LeopoldS on 02 Nov 10
     
    indeed ... already hotly debated in CDF ... any suggestions in addition to what we already contributed to this (e.g. system level optimisation)
  • Joris _ on 03 Nov 10
     
    what is the outcome of the CDF study ? I think actually that optimisation is not at all the key point. As it is stressed in this news, it is robustness (points 2 and 4). This is something we should think about ...
  • Luzi Bergamin on 03 Nov 10
     
    SYSTEM OF SYSTEMS, SYSTEM OF SYSTEMS!!! :-D
Juxi Leitner

Slashdot Science Story | Calculating Environmental Damage From Space Tourism Rockets - 3 views

science.slashdot.org/...age-From-Space-Tourism-Rockets

technology green environment danger rockets

shared by Juxi Leitner on 02 Nov 10 - No Cached
  • LeopoldS on 02 Nov 10
     
    Cynthia - please have a look ... can we check the OoM?
  • Juxi Leitner on 05 Nov 10
     
    http://www.nature.com/news/2010/101022/full/news.2010.558.html hmm should be the ACT in Nature, no? ;)
  • Ma Ru on 05 Nov 10
     
    Yeeesss :) So the "non-commercial" rockets do not emit soot? And how many "non-commercial" launches per year are there in comparison to the commercial ones? Finally commercial space-flight seems more realisable than ever, and "non-commercial" guys will do everything to prevent situation in which they have to compete on an open market... Coming years should be very interesting...
Ma Ru

And the particles brought back by Hayabusa are... - 4 views

www.jaxa.jp/...20101116_hayabusa_e.html

technology space JAXA Hayabusa asteroid

shared by Ma Ru on 16 Nov 10 - No Cached
LeopoldS liked it
  • LeopoldS on 17 Nov 10
     
    nice!
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