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pacome delva

Philosophers' Imprint - 5 views

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    An interesting (free) journal on philosophy, with even some article with mathematics and physics !
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    Reading the titles somehow reminds me of the most important webpage of the ACT: the Advanced Concepts Generator :-)
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    have you seen the 2 articles on canonical GR ...!
LeopoldS

Macroscopic invisibility cloaking of visible light : Nature Communications : Nature Publishing Group - 3 views

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    and all this without magic metamaterials ...
  • ...1 more comment...
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    Wellwellwell! I don't know how I have to complain, since I could not yet read the full article, but I'm sure I will :-).
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    It's funny to see how people get more and more humble in the desperate attempt to save their stupid ideas... At the beginning was the brave and bold aim to cloak something in free space (in a sphere or a cylinder). This requires inhomogeneous, anisotropic, magnetic materials; hopeless!! So one reduces to one polarization, now we have inhomogenous, anisotropic materials; still hopeless! At this point one downgraded the pretension: instead of cloaking in free space, we make a "carpet cloak" and hide an object behind an invisible dent in a mirror. But if that shall be continuous, we still need inhomogeneity and this is very hard. So now instead of a dent we take a cone and then it is claimed to work ... for ONE polarization. But of course the cloak can't work at all incident angles... irony of fate: everything is now made from birefringent media, the antithesis of what the metamaterials dogma was at the beginning!
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    Hi Luzi, can you please send me the paper. We are writing a project based on sulfates and carbonates, and all this BS sounds great for the introduction (The authors used Calcite as birefringent material)
LeopoldS

Scavenging Free Green Power From Radio Waves | eWEEK Europe UK - 1 views

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    Duncan and Xurxo have a look at this - just discussed today :-)
ESA ACT

:: Postdoc Scholars :: - 0 views

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    Free PostDoc VN advertising
ESA ACT

PLoS ONE: Order in Spontaneous Behavior - 0 views

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    Free will in (stupid) fruit flies - that will make swarm behaviour even more difficult...
ESA ACT

PLoS ONE: Order in Spontaneous Behavior - 0 views

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    Behavioral variations in fruit fly are not due to randomness but rather to decisions taken by the animal. Seems like free will.... also: http://brembs.net/spontaneous/
ESA ACT

Nice "old" NSA article about electronic surveillance - 0 views

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    in case you have free time and interest ...
ESA ACT

Screenshot Tour: DimDim Hosts Your Webinars for Free - 0 views

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    Would this help anyone in some virtual meetings?
ESA ACT

Mygazines.com - upload. share. archive. - 0 views

shared by ESA ACT on 24 Apr 09 - Cached
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    read most of magazines for free online
ESA ACT

David MacKay: Sustainable Energy - without the hot air: Browse - 0 views

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    A free book to download or browse online
ESA ACT

Free Vector World Maps Collection - 0 views

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    maybe useful ...
ESA ACT

Brain Scanners Can See Your Decisions Before You Make Them - 0 views

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    luca please check it out ... anything new we did not know? // TSe: it is about the old problem of the free will - when I talked about that you all killed me.
ESA ACT

SAGE: Open Source Mathematics Software - 0 views

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    Creating a viable free open source alternative to
ESA ACT

Zero Email Friday - 0 views

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    like this particularly and would even go one step further: take one day or one half day during the week internet free - just unplug the cable. We did this during my PhD in our lab and it really helped! LS
ESA ACT

Jobs for PhDs - Jobs for PhDs at PhDs.org - 0 views

shared by ESA ACT on 24 Apr 09 - Cached
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    Free PostDoc VN advertising
Alexander Wittig

Telstra free data guy devours almost one terabyte in a day - 2 views

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    When Australian mobile provider Telstra offered its mobile customers unlimited data for two separate days this year as compensation for network outages, some customers took it as a challenge to download as much as they possibly could in one day. On Sunday, 27-year-old Sydney resident John Szaszvari outdid himself and everyone else by ploughing through almost a whole terabyte of data.
Luís F. Simões

Dance Your Ph.D.: And The Winner Is... - ScienceNOW - 2 views

  • The competition challenges scientists around the world to explain their research through the most jargon-free medium available: interpretive dance. The 36 Ph.D. dances submitted this year include techniques such as ballet, break dancing, and flaming hula hoops. Those were whittled down to 12 finalists by the past winners of the contest. Those finalists were then scored by a panel of judges that included scientists, educators, and dancers.
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    Fantastic! You would love my proposal to host an artist in residence in the team :-)
LeopoldS

Ultra-efficient ionization of heavy atoms by intense X-ray free-electron laser pulses : Nature Photonics : Nature Publishing Group - 0 views

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    Extremely charged Xe ions by stripping off more electrons than previously thought possible ...
LeopoldS

Edward Snowden may be the last of the human spies | Christopher Steiner | Comment is free | guardian.co.uk - 2 views

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    reads way too pessimistic to me - or too optimistic if you are an AI guy .... Luis? Dario?
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