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pacome delva

A Physics Paradox: Holes That Block Light -- Fox 2009 (1113): 3 -- ScienceNOW - 0 views

sciencenow.sciencemag.org/...3

phy photonics

shared by pacome delva on 18 Nov 09 - Cached
  • Make holes in a film of gold so thin that it's already semitransparent, and less light gets through.
  • pacome delva on 18 Nov 09
     
    A good example of "Can we use it for space.com"... For shielding of course !
LeopoldS

Two- and three-dimensional folding of thin film single-crystalline silicon for photovol... - 0 views

www.pnas.org/...0907390106.full.pdf+html

NAN NRG photovoltaic

shared by LeopoldS on 28 Nov 09 - Cached
  • LeopoldS on 28 Nov 09
     
    very nice approach ...
  • jmlloren on 01 Dec 09
santecarloni

Galaxy's centre tastes of raspberries and smells of rum | Science | guardian.co.uk - 1 views

www.guardian.co.uk/...rries-amino-acids-astrobiology

space

shared by santecarloni on 11 Jan 13 - Cached
  • santecarloni on 11 Jan 13
     
    We just need some chocolate....
Luís F. Simões

in 1918: Unbelievable Time Required to Cover Immense Distances of Space - 5 views

modcult.org/...ver-immense-distances-of-space

fun future space history

shared by Luís F. Simões on 31 Oct 12 - No Cached
  • Luís F. Simões on 31 Oct 12
     
    some nice retro-futurology :) according to the reddit thread, this is "from the children's encyclopedia series Our Wonder World, printed around 1918. Published by Geo. L. Shuman & Co."
Luís F. Simões

Alice and Bob in Cipherspace » American Scientist - 1 views

www.americanscientist.org/...issue.aspx

INF cryptography

shared by Luís F. Simões on 11 Sep 12 - No Cached
  • A new form of encryption allows you to compute with data you cannot read
  • The technique that makes this magic trick possible is called fully homomorphic encryption, or FHE. It’s not exactly a new idea, but for many years it was viewed as a fantasy that would never come true. That changed in 2009, with a breakthrough discovery by Craig Gentry, who was then a graduate student at Stanford University. (He is now at IBM Research.) Since then, further refinements and more new ideas have been coming at a rapid pace.
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!
Thijs Versloot

The big data brain drain - 3 views

jakevdp.github.io/...big-data-brain-drain

big data

shared by Thijs Versloot on 04 Mar 14 - No Cached
  • Thijs Versloot on 04 Mar 14
     
    Echoing this, in 2009 Google researchers Alon Halevy, Peter Norvig, and Fernando Pereira penned an article under the title The Unreasonable Effectiveness of Data. In it, they describe the surprising insight that given enough data, often the choice of mathematical model stops being as important - that particularly for their task of automated language translation, "simple models and a lot of data trump more elaborate models based on less data." If we make the leap and assume that this insight can be at least partially extended to fields beyond natural language processing, what we can expect is a situation in which domain knowledge is increasingly trumped by "mere" data-mining skills. I would argue that this prediction has already begun to pan-out: in a wide array of academic fields, the ability to effectively process data is superseding other more classical modes of research.
Athanasia Nikolaou

Perovskite Solar Cells Get the Lead Out - 1 views

news.sciencemag.org/...skite-solar-cells-get-lead-out

NRG solar Chem

shared by Athanasia Nikolaou on 07 May 14 - No Cached
  • Athanasia Nikolaou on 07 May 14
     
    The fast developping solar cell technology of perovskites. "Perovskites are a broad class of crystalline minerals that have been known for well over a century. But their ability to convert solar energy to electricity came to light only in 2009. Since then, the efficiency of perovskite solar cells has climbed from 3.8% to 19.3%, a pace of improvement unmatched by any other solar technology. By comparison, crystalline silicon solar cells, the leading commercial technology, convert about 25% of solar energy to electricity."
Juxi Leitner

'Time telescope' could boost fibre-optic communication - tech - 28 September 2009 - New... - 0 views

www.newscientist.com/...-fibreoptic-communication.html

phy time lense fibre-optic

shared by Juxi Leitner on 29 Sep 09 - Cached
  • "A time lens is essentially like an optical lens," says Foster. An optical lens can deflect a light beam into a much smaller area of space; a time lens deflects a section of a light beam into a smaller chunk of time.
duncan barker

Top 10 Ridiculous Patents - 4 views

top-10-list.org/...top-ten-ridiculous-patents

pure class

shared by duncan barker on 19 Aug 10 - Cached
Dario Izzo liked it
  • duncan barker on 19 Aug 10
     
    My favorite is the "Device to Sense if a Pedestrian Was Hit by a car" invention
Luís F. Simões

This Will Change Everything: Ideas That Will Shape the Future (The Edge Annual Question... - 3 views

www.edge.org/q09_index.html

edge future science technology

shared by Luís F. Simões on 28 Nov 10 - Cached
LeopoldS liked it
  • WHAT WILL CHANGE EVERYTHING? "What game-changing scientific ideas and developments do you expect to live to see?"
  • That's the question John Brockman, editor of the Web site edge.org, posed to about 160 cutting-edge minds in his 11th annual Edge Question. As in years past, they responded with bold, often thrilling, sometimes chilling, answers.
  • Luís F. Simões on 28 Nov 10
     
    And here's the same thing, but in dead-trees format: http://www.amazon.com/This-Will-Change-Everything-Future/dp/0061899674 Anyone else thinks that the ACT should buy us all a copy as a Christmas present? :)
  • LeopoldS on 29 Nov 10
     
    you are the ACT!!!
pacome delva

How to walk through walls - 6 views

physicsworld.com/...44576

phy transformation_optics

shared by pacome delva on 15 Dec 10 - No Cached
  • Luzi Bergamin on 15 Dec 10
     
    and yet another TO nonsense... And why always Harry Potter, dont't these darn scientists have more imagination or is their intellectual level just as low as being unable to read more complex literature than J.K. Rawling?? btw.: how about this skype session on TO, Leo?
  • dejanpetkow on 15 Dec 10
     
    Combine it with touchable holography (search for SIGGRAPH 2009 at youtube) and name it Holosuite 0.1.
Francesco Biscani

Gigapixel-Dresden.de - Large Size Panoramas - 4 views

www.dresden-26-gigapixels.com/dresden26GP

fun

shared by Francesco Biscani on 18 Feb 10 - Cached
pacome delva liked it
  • The picture was made with the Canon 5D mark II and a 400mm-lens. It consists of 1.665 full format pictures with 21.4 megapixel, which was recorded by a photo-robot in 172 minutes.
  • Ma Ru on 18 Feb 10
     
    "With a resolution of 297.500 x 87.500 pixel (26 gigapixel) the picture is the largest in the world. (stand December 2009)" Daring statement... I'm not quite sure, but I'd quess microscopic images used in medicine can easily reach terapixels... What a waste of pixels anyway... they weren't able to find a bit more interesing city?
  • pacome delva on 23 Feb 10
     
    yeah... like Leiden !
pacome delva

Dutch Scientists Grow First Pork Meat In Lab - 4 views

www.popsci.com/...ientists-grow-first-vitro-pork

artificial_meat

shared by pacome delva on 05 Mar 10 - Cached
LeopoldS liked it
  • pacome delva on 05 Mar 10
     
    So much for dutch food!!!
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