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ESA ACT

Power.com - All your friends in just one place. - 0 views

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    Centralise all your networks / messaging in one place. One of the best I've seen available. Havent tested yet... (KdG)
ESA ACT

Technology Review: A Better Network for Outer Space - 0 views

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    I like the far-thinking approach...
ESA ACT

A solid-state light-matter interface at the single-photon level - 0 views

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    First demostration of coherent and reversible mapping of a light field with less than one photon per pulse onto an ensemble of approx10^7 atoms naturally trapped in a solid.
ESA ACT

Technology Review: Laser Lunar Landing System - 0 views

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    NASA still on active sensors...
ESA ACT

O3 spaces ... - 0 views

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    collaborative working with open office - has anybody already tried this out? -LS
ESA ACT

Shrimp Eyes May Hold Key to Better Communications - 0 views

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    Tobias - have a look at this!!! LS // I know one of the persons and knew the study - how could we use it? (TSe)
ESA ACT

JoVE: Journal of Visualized Experiments - Biological Experiments and Protocols on Video - 0 views

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    Journal made of videos instead of papers. Ready to submit, CollettivoLeiden
ESA ACT

Home | Galaxy Zoo - 0 views

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    An alternative to curiosity cloning: Let millions of people have a look at the pictures...
ESA ACT

Nature Online Video Streaming Archive - 0 views

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    videos on scienes - easier than reading the papers...
ESA ACT

SpaceTime™ - 0 views

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    An interesting internet browser for the near future
ESA ACT

Twitter - 0 views

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    the new hype in the web
ESA ACT

Dolphin :: Smart Community Builder :: Free Software - 0 views

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    this looks like a good one to try ...
LeopoldS

Global Innovation Commons - 4 views

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    nice initiative!
  • ...6 more comments...
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    Any viral licence is a bad license...
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    I'm pretty confident I'm about to open a can of worms, but mind explaining why? :)
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    I am less worried about the can of worms ... actually eager to open it ... so why????
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    Well, the topic GPL vs other open-source licenses (e.g., BSD, MIT, etc.) is old as the internet and it has provided material for long and glorious flame wars. The executive summary is that the GPL license (the one used by Linux) is a license which imposes some restrictions on the way you are allowed to (re)use the code. Specifically, if you re-use or modify GPL code and re-distribute it, you are required to make it available again under the GPL license. It is called "viral" because once you use a bit of GPL code, you are required to make the whole application GPL - so in this sense GPL code replicates like a virus. On the other side of the spectrum, there are the so-called BSD-like licenses which have more relaxed requirements. Usually, the only obligation they impose is to acknowledge somewhere (e.g., in a README file) that you have used some BSD code and who wrote it (this is called "attribution clause"), but they do not require to re-distribute the whole application under the same license. GPL critics usually claim that the license is not really "free" because it does not allow you to do whatever you want with the code without restrictions. GPL proponents claim that the requirements imposed by the GPL are necessary to safeguard the freedom of the code, in order to avoid being able to re-use GPL code without giving anything back to the community (which the BSD license allow: early versions of Microsoft Windows, for instance, had the networking code basically copy-pasted from BSD-licensed versions of Unix). In my opinion (and this point is often brought up in the debates) the division pro/against GPL mirrors somehow the division between anti/pro anarchism. Anarchists claim that the only way to be really free is the absence of laws, while non-anarchist maintain that the only practical way to be free is to have laws (which by definition limit certain freedoms). So you can see how the topic can quickly become inflammatory :) GPL at the current time is used by aro
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    whoa, the comment got cut off. Anyway, I was just saying that at the present time the GPL license is used by around 65% of open source projects, including the Linux kernel, KDE, Samba, GCC, all the GNU utils, etc. The topic is much deeper than this brief summary, so if you are interested in it, Leopold, we can discuss it at length in another place.
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    Thanks for the record long comment - am sure that this is longest ever made to an ACT diigo post! On the topic, I would rather lean for the GPL license (which I also advocated for the Marek viewer programme we put on source forge btw), mainly because I don't trust that open source is by nature delivering a better product and thus will prevail but I still would like to succeed, which I am not sure it would if there were mainly BSD like licenses around. ... but clearly, this is an outsider talking :-)
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    btw: did not know the anarchist penchant of Marek :-)
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    Well, not going into the discussion about GPL/BSD, the viral license in this particular case in my view simply undermines the "clean and clear" motivations of the initiative authors - why should *they* be credited for using something they have no rights for? And I don't like viral licences because they prevent using things released under this licence to all those people who want to release their stuff under a different licence, thus limiting the usefulness of the stuff released on that licence :) BSD is not a perfect license too, it also had major flaws And I'm not an anarchist, lol
pacome delva

Physics - Free falling - 2 views

  • In a Rapid Communication appearing in Physical Review A, Pengfei Zhang and colleagues at Shanxi University, China, describe experiments where they tracked an atom’s path with a spatial resolution of 100 nanometers and in a measurement time of 10 microseconds.
LeopoldS

Statistically induced phase transitions and anyons in 1D optical lattices : Nature Communications : Nature Publishing Group - 1 views

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    sante have a look .... Anyons ... !!
Christos Ampatzis

International Experts Blend Space Technologies and Crowdsourcing to Enhance Disaster Management Tools - 1 views

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    Crowsourcing Awareness: "To augment the use of these space technologies, virtual communities of group intelligence - called "Crowdsourcing" - can aide in emergency planning and post-disaster coordination."
Nicholas Lan

Google and Facebook Investigating Launching Satellites - 1 views

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    unfortunately the original article is subscription only "Among the evidence the article cites for this conclusion is Google's recent hiring of Brian Holtz and Dave Bettinger. Both came from companies (O3b and VT iDirect respectively) that specialize in communication satellites. Google has also invested in O3b and a current Google employee sits on company's board. A Boeing representative told The Information that Facebook and Google are "beginning to show a broader interest in satellite technology." While both companies are looking to space to broaden their reach, the ad-supported Google has the potential resources (cash) and gumption to actually follow through in the immediate future."
Thijs Versloot

Effectively Universal Behavior of Rotating Neutron Stars in General Relativity Makes Them Even Simpler than Their Newtonian Counterparts - 0 views

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    Recently, it was shown that slowly rotating neutron stars exhibit an interesting correlation between their moment of inertia I, their quadrupole moment Q, and their tidal deformation Love number λ (the I-Love-Q relations), independently of the equation of state of the compact object. By exploiting this relation, we can describe quite accurately the geometry around a neutron star with fewer parameters, even if we don't know precisely the equation of state. Side note: I-Love-Q relations? Some inner chuckles in the Fundamental Physicist community.. :)
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