Skip to main content

Home/ Groups/ Advanced Concepts Team
Rss Feed
Sort By: Most Recent | Popular Filter: All | Bookmarks | Topics Simple Middle
sreejanag

The creator of Dilbert and his experience with energy efficiency - 4 views

online.wsj.com/...4868604575433620189923744.html

energy technology fun

shared by sreejanag on 25 Aug 10 - Cached
Ma Ru liked it
  • sreejanag on 25 Aug 10
     
    Funny read, if nothing else!
Joris _

Qwiki - 8 views

www.qwiki.com

INF technology

shared by Joris _ on 06 Oct 10 - No Cached
  • Joris _ on 06 Oct 10
     
    "information experience" ... impressive
  • duncan barker on 07 Oct 10
     
    Nice!! I want that thing on my mobile which wakes you up in the morning with the weather and temperature....so cool
  • LeopoldS on 10 Oct 10
     
    you will need to explain me what is nice in there ....
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!
Luís F. Simões

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

ngrams.googlelabs.com/graph

space history zeitgeist culturomics google books

shared by Luís F. Simões on 22 Dec 10 - No Cached
LeopoldS liked it
  • Luís F. Simões on 22 Dec 10
     
    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
Dario Izzo

Gardening in space with HydroTropi - 0 views

www.sciencedaily.com/...110119095759.htm

ai bio

shared by Dario Izzo on 30 Jan 11 - No Cached
  • Dario Izzo on 30 Jan 11
     
    Roots in space!!!
  • Luís F. Simões on 31 Jan 11
     
    "Using cucumber plants (scientific name Cucumis sativus)" ...
LeopoldS

Darpa's New Recruits: You, Your Grandpa and Your Dog | Danger Room | Wired.com - 4 views

www.wired.com/...-you-your-grandpa-and-your-dog

shared by LeopoldS on 17 Feb 11 - No Cached
  • LeopoldS on 17 Feb 11
     
    Darpa going crowd-sourcing ... for 25 million ....
Luís F. Simões

Why Randomly-Selected Politicians Would Improve Democracy - Technology Review - 4 views

www.technologyreview.com/...26488

CMS politics Ig Nobel

shared by Luís F. Simões on 10 Mar 11 - No Cached
LeopoldS liked it
  • If Pluchino sounds familiar, it's because we've talked about him and his pals before in relation to the Peter Principle that incompetence always spreads through big organisations. Back in 2009, he and his buddies created a model that showed how promoting people at random always improves the efficiency of the organisation. These guys went on to win a well-deserved IgNobel prize for this work.
  • Ref: arxiv.org/abs/1103.1224: Accidental Politicians: How Randomly Selected Legislators Can Improve Parliament Efficiency
  • Luzi Bergamin on 10 Mar 11
     
    I think I start to understand why Italian politics does so horribly bad...
  • LeopoldS on 10 Mar 11
     
    ... because they don't follow this rule!
  • Dario Izzo on 11 Mar 11
     
    According to the authors we have four types of people in the parlement: 1) intelligent people whose actions produce a gain for both themselves and for other people. 2) helpless/naive people in the top left quadrant whose actions produce a loss for themselves but a gain for others; 3) bandits whose actions produce a gain for themselves but a loss for other people. 4) stupid people in the bottom left quadrant produce a loss for themselves and also for other people. According to the above definition it is clear that their model does not apply to the italian parlament where we only have stupid people and bandits.
Luís F. Simões

Pioneer Anomaly Solved By 1970s Computer Graphics Technique - Technology Review - 4 views

www.technologyreview.com/...26589

pioneer anomaly PHY astrophysics

shared by Luís F. Simões on 31 Mar 11 - No Cached
Nicholas Lan liked it
  • Now Frederico Francisco at the Instituto de Plasmas e Fusao Nuclear in Lisbon Portugal, and a few pals, say they've worked out where the thermal calculations went wrong. These guys have redone the calculations using a computer model of not only how the heat is emitted but how it is reflected off the various parts of the spacecraft too. The reflections turn out to be crucial.
  • Ref: arxiv.org/abs/1103.5222: Modelling The Reflective Thermal Contribution To The Acceleration Of The Pioneer Spacecraft
  • santecarloni on 01 Apr 11
     
    This is really cool. I know one of the authors and he is a good guy... the only thing that leaves me unsatisfied is that if the whole issue is related to thermal effects one should have seen the Pioneer effect all the time and not only at about 10 AU... ...or is there some thermal process that kicked in only at this distance?
  • Luís F. Simões on 26 Jul 11
     
    Here's an update on this theory: NASA Releases New Pioneer Anomaly Analysis "The mysterious force acting on the Pioneer spacecraft seems to be falling exponentially. That's a strong clue that on-board heat is to blame, says NASA." Heat emission 'most likely cause' of pioneer anomaly "What's more interesting is that, contrary to the original analysis conducted all those years ago, the deceleration does seem to be decelerating at an exponential rate -- just as one might expect from the radioactive decay of plutonium-238, which powers the two spacecraft. Turyshev concludes, "The most likely cause of the Pioneer anomaly is the anisotropic emission of on-board heat.""
LeopoldS

Bionische Roboter erkunden fremde Planeten | Technology Review - 4 views

www.heise.de/...n-fremde-Planeten-1254281.html

shared by LeopoldS on 14 Jun 11 - No Cached
Juxi Leitner liked it
  • LeopoldS on 14 Jun 11
     
    "ESA Forscher Dr. Tobias Seidl"
Joris _

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

spectrum.ieee.org/...0

Thruster PHY NRG NASA

shared by Joris _ on 29 Jun 11 - No Cached
LeopoldS liked it
  • 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.
  • Joris _ on 29 Jun 11
     
    "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. "
  • LeopoldS on 02 Jul 11
     
    Dejan please have a look at this also ...
  • LeopoldS on 02 Jul 11
     
    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. "
LeopoldS

NASA - Mars Science Laboratory, the Next Mars Rover - 4 views

www.nasa.gov/...index.html

shared by LeopoldS on 22 Jul 11 - No Cached
Marion Nachon liked it
  • LeopoldS on 23 Jul 11
     
    forgot to put in my comment: they have chosen a nice landing site .... and quite late it seems to me ...
Luís F. Simões

Pee power: Urine-loving bug churns out space fuel - 4 views

www.physorg.com/...r-urine-loving-bug-churns.html

NRG fuel bacteria

shared by Luís F. Simões on 03 Oct 11 - No Cached
LeopoldS liked it
  • Scientists on Sunday said they had gained insights into a remarkable bacterium that lives without oxygen and transforms ammonium, the ingredient of urine, into hydrazine, a rocket fuel.
  • LeopoldS on 11 Oct 11
     
    Camilla: can we have a closer look into this and maybe do something further?
Guido de Croon

Crowd sourcing site for science funding - 4 views

www.rockethub.com/...scifund

shared by Guido de Croon on 11 Nov 11 - No Cached
LeopoldS liked it
  • LeopoldS on 12 Nov 11
     
    nice - and we could be the first ones to propose something in the space category ... good ideas welcome! http://www.rockethub.com/projects/scifund/by_category/35-space
santecarloni

Occupy Federal Science: "Transformative" Research Can't Come From Milquetoast | The Cru... - 4 views

blogs.discovermagazine.com/...rch-cant-come-from-milquetoast

science research

shared by santecarloni on 14 Dec 11 - No Cached
LeopoldS liked it
  • LeopoldS on 15 Dec 11
     
    I like this one "The kind of idle pastime that might amuse physicists is to imagine drafting Einstein's grant applications in 1905. "I propose to investigate the idea that light travels in little bits," one might say. "I will explore the possibility that time slows down as things speed up," goes another. Imagine what comments these would have elicited from reviewers for the German Science Funding Agency, had such a thing existed. Instead, Einstein just did the work anyway while drawing his wages as a technical expert third-class at the Bern patent office. And that is how he invented quantum physics and relativity." There is an even more pointer example of the Prussian academy of sciences reviewing the Dr. application of Hertz ...
  • dejanpetkow on 16 Dec 11
     
    Shocking. What is federal research funding for? No, wrong question. Instead maybe: What is federally funded review for?
Lionel Jacques

SLS Boosters Raise Hope For Kerosene - 4 views

www.aviationweek.com/...story_channel.jsp

space propulsion

shared by Lionel Jacques on 15 Dec 11 - No Cached
LeopoldS liked it
  • Lionel Jacques on 15 Dec 11
     
    Would be nice to also push for other alternative fuel and biofuel like the ones studied at Glenn Research Center for airacraft gas turbines (Fischer Tropsch Fuel instead of JP-8) and presented an the International Workshop on Environment and Alternative Energy at ESTEC
santecarloni

Physics World reveals its top 10 breakthroughs for 2011 - physicsworld.com - 4 views

physicsworld.com/...48126

science

shared by santecarloni on 16 Dec 11 - No Cached
LeopoldS liked it
  • pacome delva on 06 Jan 12
     
    hello, funny bug on diigo ! I shared this link on 16 Dec and Sante on 22 Dec, but my share disapeared...
santecarloni

Solar power: Building a better suntrap | The Economist - 4 views

www.economist.com/21542157

solar power science technology

shared by santecarloni on 04 Jan 12 - No Cached
  • santecarloni on 04 Jan 12
     
    always said so...
Joris _

SpaceX-Dragon Capsule - 4 views

www.spacex.com/...index.html

technology Space

shared by Joris _ on 25 Jan 12 - No Cached
LeopoldS liked it
  • Joris _ on 25 Jan 12
     
    Inside the SpaceX Dragon capsule. Did you say cosy ?
Dario Izzo

Check your country impact on science!!! - 8 views

www.sciencegateway.org/...index.html

journal academic impact Science Ranking research

shared by Dario Izzo on 25 Jan 12 - Cached
  • Dario Izzo on 25 Jan 12
     
    Did you know that papers in space science are among the most quoted? Check how your country is doing .... you will be surprised :)
  • ...7 more comments...
  • dejanpetkow on 26 Jan 12
     
    In terms of country based quotations ("Most scited countries") I cannot access space science, only Geosciences, Immunology, Material Science, and Psychiatry & Psychology. But when I first saw the list of countries at the left under "Impact in Science" I saw Argentinia was on top, and USA was on last position. Yes, I was surprised, until I realised that is was just an alphabetical order. Did you see the same list?
  • Nicholas Lan on 26 Jan 12
     
    scotland's a separate country. must be preparing for independence already. and it's highest percentage is for space science. crazy
  • Dario Izzo on 26 Jan 12
     
    Dajan, you need to click on the country you are interested in ....
  • dejanpetkow on 26 Jan 12
     
    Nooo, can't be THAT simple.
  • LeopoldS on 26 Jan 12
     
    data a bit old .... newer data (but less well presented) at http://sciencewatch.com/ there you can also read: "The 20th century was largely dominated by the US as a major powerhouse of scientific research and innovation, with 40% of the papers indexed in the Web of Science fielded by US scientists in the 1990s. By 2009, that figure was down to 29%. The US now struggles to keep pace with increased output from Europe and Asia."
  • LeopoldS on 26 Jan 12
     
    hottest space science paper in January 2012: Field: Space Science Article Title: Herschel Space Observatory An ESA facility for far-infrared and submillimetre astronomy Authors: Pilbratt, GL;Riedinger, JR;Passvogel, T;Crone, G;Doyle, D;Gageur, U;Heras, AM;Jewell, C;Metcalfe, L;Ott, S;Schmidt, M Journal: ASTRON ASTROPHYS, 518: art. no.-L1 JUL-AUG 2010 * ESTEC SRE SA, ESA Res & Sci Support Dept, Keplerlaan 1, NL-2201 AZ Noordwijk, Netherlands. * ESTEC SRE SA, ESA Res & Sci Support Dept, NL-2201 AZ Noordwijk, Netherlands. * ESTEC SRE OA, ESA Sci Operat Dept, NL-2201 AZ Noordwijk, Netherlands. * ESTEC SRE P, ESA Sci Operat Dept, NL-2201 AZ Noordwijk, Netherlands. * ESOC OPS OAH, ESA Mission Operat Dept, D-64293 Darmstadt, Germany. * ESAC SRE OA, ESA Sci Operat Dept, Madrid 28691, Spain.
  • Ma Ru on 30 Jan 12
     
    Interestingly, Space Science is the only field in which my country has positive "Impact vs. world" value (even more interestingly as we don't even have a proper national space agency)...
  • LeopoldS on 30 Jan 12
     
    this might also be an indication / point to an issue with their data concerning space science publications ... quite surprising indeed that all Europeans are doing so well in this field
  • jmlloren on 01 Feb 12
     
    Something should be wrong, for Spain I can read: Economics & Business 4.54 -28 Only minus 28!
santecarloni

Artificial Braneworlds Made to Collide In Lab - Technology Review - 4 views

www.technologyreview.com/...27537

metamaterials cosmology PHY

shared by santecarloni on 31 Jan 12 - No Cached
pacome delva liked it
  • santecarloni on 31 Jan 12
     
    Physicists have simulated two universes colliding inside a metamaterial--  Now, this is cool (if it is true...)
  • ...1 more comment...
  • LeopoldS on 01 Feb 12
     
    we... the article is a bit overblown in my view ... except maybe the last paragraphs: "The collision between universe's is a variation on this theme. "The "colliding universe" scenario can be realized as a simple extension of our earlier experiments simulating the spacetime geometry in the vicinity of big bang," he says. He simulates an expanding universe using concetric rings of gold separated by a dielectric. "When the two concentric ring ("universe") patterns touch each other ("collide"), a Minkowski domain wall is created, in which the metallic stripes touch each other at a small angle," he says. Being able to recreate these exotic events in the lab is certainly interesting but it is beginning to lose its novelty. The problem is that this work is not telling us anything we didn't know--the universe behaves the same way inside a metamaterial as it does outside. What Smolyaninov needs is a way of using his exotic materials to do something interesting. In other words, he needs a killer app. Any ideas? "
  • Luzi Bergamin on 05 Feb 12
     
    Hm, they use more or less everything I don't especially like. They are nonmagnetic, so the relation materialGR is already rather weak. Usually, experimentalists prefer nonmagnetic media, since they are cheaper and broadband. At least the broadband is no argument here, since the frequency defines the "mass", which I find a rather strange point of view. And finally, they use strong anisotropy as a model of "time", which is rather problematic. Of course, the spatial direction with eps<0 appears in the wave equation with the same sign as time. But this does not mean that it behaves like time. But to teach material physicists that time is more than just a different sign in the wave equation seems to be as hopeless as to teach them that a black hole is more than something that absorbs all light... SIGHHH
  • LeopoldS on 10 Feb 12
     
    Luzi I miss you ...
« First ‹ Previous 141 - 160 Next › Last »
Showing 20▼ items per page
Apply to join this group