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March 27 2010

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An illustration depicting the state of affairs in our current understanding of particle physics. Time to explore the exotic lands!

December 21 2009

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A zoom from the Himalayas to the microwave background and back compiled by the American Museum of Natural History from current data. It shows our place in the part of the universe we can see and the many galaxies in the neighbourhood that have been mapped. (note: the black cones are not due to some weird geometry, we simply haven't looked that way yet.)

Thanks to http://backreaction.blogspot.com/2009/12/from-distance.html for the tip.
Reposted bypostpoeia postpoeia

November 18 2009

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November 17 2009

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A selection of mathematics quotes

thinkexist.com offers a very comprehensive collection of quotes on just about any topic imaginable. The quotes on Mathematics are especially amusing. My current favourite is by F. Klein: "Everyone knows what a curve is, until he has studied enough mathematics to become confused through the countless number of possible exceptions." Well, back to unraveling the mysteries of the universe ;)

October 09 2009

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Oops, that was a typo. It's operating system and thunderbird version dependent actually. (but not distribution dependent)
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Thunderbird thread view trick

As many others I subscribe to a substantial number of mailing lists and often follow mail threads with hundreds of messages. The standard Thunderbird thread view has the problem that threads with new messages can be hidden "400 mails down", making one miss them. By using Tools->Options->Advanced->Config Editor and then changing the value of mailnews.thread_pane_column_unthreads to FALSE, threads with new messages are resorted by date and hence appear at the front of the list of messages. Very useful.

September 29 2009

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A high resolution arrangement of a 360° view of the night sky, pasted together from hundreds of photographs made at different times. The mapping distorts the sizes at the top and bottom (as on a world map) The author is a photographer called Brunier. More details on the image here: http://eso.org/gallery/v/ESOPIA/Galaxies/phot-32a-09-fullres.tif.html

A higher resolution 4000x2000 version here.

An interactive, very high-resolution version here. (coral cache, still slow)
Reposted bySpecies5618 Species5618

September 21 2009

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Another talk by Hans Rosling shows how our mindset about the "developing" world is stuck in the past.

September 15 2009

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Belege, Hintergründe, Erklärungen und "Beweise" zu den einzelnen Szenen gibt es auf:

http://www.RetteDeineFreiheit.de

Neuigkeiten: http://RetteDeineFreiheit.wordpress.com

September 08 2009

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September 07 2009

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Storing all of our culture with perpetual access for everyone.

To store 720p AND 1080p copies of every movie and tv-show listed on IMDB would probably take something like 10 PB. That would likely cover dubbed soundtracks and subtitles as well.

And at Sun's prices, that'd be about 10 million dollars for a single copy (not including data center costs) stored in 21 racks.

Add in all the books ever written, music and news papers published, what are we looking at? 50 PB for a full copy? Obviously you'd need redundant storage placed on various continents, and you'd expect to replace the hardware every once in a while, but what is our entire cultural history worth to us as a civilization? A billion dollars a year? Two? Keep in mind, it shouldn't just be the US or the EU funding this, it should be everyone.

Make it a requirement for companies that if they want copyrights on their works, they have to submit it unencumbered to the storage facility. That way there can be no excuses from the companies, that they don't have $work in production any more, as it'd be easy to sell access to a particular work. And if they can't submit it for whatever reason? Copyright expires on that particular work. That'd certainly get their asses in gear to get their entire back catalogue digitized.

via MartinShou @ slashdot
http://yro.slashdot.org/comments.pl?sid=1360387&cid=29343037

July 18 2009

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Linux vulnerable to null pointer dereference exploits.

And yet another reminder that you should always check pointers for NULL before dereferencing them. Also, did you know that gcc disables "unnecessary" null pointer checks with -O2? Use -fno-delete-null-pointer-checks to prevent this from happening. To quote man gcc: "The compiler assumes that dereferencing a null pointer would have halted the program.  If a pointer is checked after it has already been dereferenced, it cannot be null. In some environments, this assumption is not true, and programs can safely dereference null pointers." It is sometimes possible to have 0x00000000 mapped to userspace (in this case by way of a kernel module and a setuid pulseaudio), thus preventing the segmentation fault that would usually occur when remapping 0x00000000 to your own code.

More details here (in German, but very informative): http://www.heise.de/newsticker/Root-Exploit-fuer-Linux-Kernel-veroeffentlicht--/meldung/142171 and here for the exploit itself: http://lists.grok.org.uk/pipermail/full-disclosure/2009-July/069714.html and more explanation here: http://isc.sans.org/diary.html?storyid=6820
Reposted bySteveClement SteveClement

April 11 2009

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"Hacker spaces" are giving geek tinkerers a place to gather, create and collaborate

Reposted fromsyn2cat syn2cat

April 02 2009

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April 01 2009

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L.A.S.E.R. Tag Linux port

syn2cat is proud to present the linux version of the L.A.S.E.R. Tag software by Teodore Watson (http://www.muonics.net) and Zachary Lieberman (http://www.thesystemis.com/).

The software can be downloaded on the syn2cat wiki https://www.hackerspace.lu/wiki/Lasertag_linux .
Reposted fromgrl-lu grl-lu
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NYCResistor & U.S. Hackerspaces Featured on Wired.com

Dylan Tweney wrote a fantastic article on Wired.com about hackerspaces in the US. NYCResistor was profiled along with Hack DC and Noisebridge. A fun and interesting read…

While many movements begin in obscurity, hackers are unanimous about the birth of U.S. hacker spaces: August, 2007 when U.S. hackers Bre Pettis, Nicholas Farr, Mitch Altman and others visited Germany on a geeky field trip called Hackers on a Plane.

“It’s almost a Fight Club for nerds,” says Nick Bilton of his hacker space, NYC Resistor in Brooklyn, New York…

DIY Freaks Flock to ‘Hacker Spaces’ Worldwide, by Dylan Tweney

Reposted fromhackerspaces hackerspaces

March 29 2009

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government sponsored fraud

Bloody hell: Two psychics have been given government funding to teach people how to "communicate with the dead". http://www.ananova.com/news/story/sm_3256361.html

March 27 2009

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Twouble with Twitters

Reposted fromsilsha silsha

March 25 2009

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Hide from your own fear for it may destroy you.
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