Group items matching "it" in title, tags, annotations or url - Advanced Concepts Team

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Pi Computation Record - 4 views

bellard.org/pi2700e9 inf

shared by Francesco Biscani on 06 Jan 10 - Cached

Francesco Biscani on 06 Jan 10

For Dario: the PI computation record was established on a single desktop computer using a cache optimized algorithm. Previous record was obtained by a cluster of hundreds of computers. The cache optimized algorithm was 20 times faster.

<div class="cArrow"> </div><div class="cContentInner">For Dario: the PI computation record was established on a single desktop computer using a cache optimized algorithm. Previous record was obtained by a cluster of hundreds of computers. The cache optimized algorithm was 20 times faster.</div>

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Ma Ru on 06 Jan 10

Teeeeheeeeheeee... assembler programmers greet Java/Python/Etc. programmers :)

<div class="cArrow"> </div><div class="cContentInner">Teeeeheeeeheeee... assembler programmers greet Java/Python/Etc. programmers :)</div>

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Dario Izzo on 07 Jan 10

And he seems to have done everything in his free time!!! I like the first FAQ.... "why did you do it?"

<div class="cArrow"> </div><div class="cContentInner">And he seems to have done everything in his free time!!! I like the first FAQ.... "why did you do it?"</div>

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nikolas smyrlakis on 07 Jan 10

this is the guy btw http://en.wikipedia.org/wiki/Fabrice_Bellard

<div class="cArrow"> </div><div class="cContentInner">this is the guy btw <a href="http://en.wikipedia.org/wiki/Fabrice_Bellard" rel="nofollow" target="_blank">http://en.wikipedia.org/wiki/Fabrice_Bellard</a></div>

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LeopoldS on 07 Jan 10

did you read any of the books he recommends? suggest: Modern Computer Arithmetic by Richard Brent and Paul Zimmermann, version 0.4, November 2009, Full text available here. The Art of Computer Programming, volume 2 : Seminumerical Algorithms by Donald E. Knuth, Addison-Wesley, third edition, 1998. More information here.

<div class="cArrow"> </div><div class="cContentInner">did you read any of the books he recommends? suggest: Modern Computer Arithmetic by Richard Brent and Paul Zimmermann, version 0.4, November 2009, Full text available here. The Art of Computer Programming, volume 2 : Seminumerical Algorithms by Donald E. Knuth, Addison-Wesley, third edition, 1998. More information here.</div>

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LeopoldS on 07 Jan 10

btw: we will very soon have the very same processor in the new iMac .... what record are you going to beat with it?

<div class="cArrow"> </div><div class="cContentInner">btw: we will very soon have the very same processor in the new iMac .... what record are you going to beat with it?</div>

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Francesco Biscani on 08 Jan 10

Zimmerman is the same guy behind the MPFR multiprecision floating-point library, if I recall correctly: http://www.mpfr.org/credit.html I've not read the book... Multiprecision arithmetic is a huge topic though, at least from the scientific and number theory point of view if not for its applications to engineering problems. "The art of computer programming" is probably the closest thing to a bible for computer scientists :)

<div class="cArrow"> </div><div class="cContentInner">Zimmerman is the same guy behind the MPFR multiprecision floating-point library, if I recall correctly: <a href="http://www.mpfr.org/credit.html" rel="nofollow" target="_blank">http://www.mpfr.org/credit.html</a> I've not read the book... Multiprecision arithmetic is a huge topic though, at least from the scientific and number theory point of view if not for its applications to engineering problems. "The art of computer programming" is probably the closest thing to a bible for computer scientists :)</div>

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Francesco Biscani on 08 Jan 10

"btw: we will very soon have the very same processor in the new iMac .... what record are you going to beat with it?" Fastest Linux install on an iMac :)

<div class="cArrow"> </div><div class="cContentInner">"btw: we will very soon have the very same processor in the new iMac .... what record are you going to beat with it?" Fastest Linux install on an iMac :)</div>

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Juxi Leitner on 08 Jan 10

"Fastest Linux install on an iMac :)" that is going to be a though one but a worthy aim! ""The art of computer programming" is probably the closest thing to a bible for computer scientists :)" yep! Programming is art ;)

<div class="cArrow"> </div><div class="cContentInner">"Fastest Linux install on an iMac :)" that is going to be a though one but a worthy aim! ""The art of computer programming" is probably the closest thing to a bible for computer scientists :)" yep! Programming is art ;)</div>

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FT.com / Technology - Facebook becomes bigger hit than Google - 1 views

www.ft.com/...f7-11df-b057-00144feabdc0.html technology facebook google hitwise

shared by nikolas smyrlakis on 17 Mar 10 - Cached

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Mars Exploration Rover Mission: Press Releases - 6 views

marsrover.nasa.gov/...20100323a.html mars rover exploration AI technology space

shared by andreiaries on 25 Mar 10 - Cached

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The Next Evolution of Facebook Platform - Facebook-Entwickler - 2 views

developers.facebook.com/...377

shared by LeopoldS on 22 Apr 10 - Cached

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Boeing probes international market for human spacecraft - 1 views

spaceflightnow.com/...10cst100 human spaceflight commercial spaceflight

shared by Luís F. Simões on 11 Feb 11 - No Cached

The aerospace powerhouse is designing and testing systems for its CST-100 space capsule, a craft the company says could begin flying astronauts to low Earth orbit by 2015. it will launch on existing rockets to lessen development risk and costs.
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"The spacecraft that we're designing is rocket-agnostic. It would be possible to sell this like a commercial airplane to countries who perhaps have a launch vehicle who would like to launch It in their own country."
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Luís F. Simões on 11 Feb 11

...and hitting the news in the same day: A Rocket Built from U.S. and European Parts "A new rocket that would combine parts from NASA's canceled Ares I rocket as well as the Ariane 5 , a well-proven European satellite launcher, could provide a low-cost option for taking crew and cargo to the space station. The rocket proposal was announced this week by ATK, an aerospace and defense company that manufactures the solid rocket motors for NASA's space shuttles, and Astrium, the European company that makes the Ariane 5. They say the rocket, called Liberty, would be ready for flight by 2015." "Other commercial companies, including Boeing and Orbital Sciences Corporation, are looking to use low-end versions of the Atlas V to carry the capsules they are building. Liberty could carry any capsule at a cost less than that of the Atlas V, according to ATK." Look! Competition! :)

<div class="cArrow"> </div><div class="cContentInner">...and hitting the news in the same day: A Rocket Built from U.S. and European Parts "A new rocket that would combine parts from NASA's canceled Ares I rocket as well as the Ariane 5 , a well-proven European satellite launcher, could provide a low-cost option for taking crew and cargo to the space station. The rocket proposal was announced this week by ATK, an aerospace and defense company that manufactures the solid rocket motors for NASA's space shuttles, and Astrium, the European company that makes the Ariane 5. They say the rocket, called Liberty, would be ready for flight by 2015." "Other commercial companies, including Boeing and Orbital Sciences Corporation, are looking to use low-end versions of the Atlas V to carry the capsules they are building. Liberty could carry any capsule at a cost less than that of the Atlas V, according to ATK." Look! Competition! :)</div>

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The Fallout of a Helium-3 Crisis : Discovery News - 3 views

news.discovery.com/...fall-of-a-helium-3-crisis.html helium crisis moon mining

shared by Luís F. Simões on 22 Feb 11 - No Cached

So short in fact, that last year when the looming crisis, which reporters had been covering for years, became official, the price of helium-3 went from $150 per liter to $5,000 per liter.
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The science, medical and security uses for helium-3 are so diverse that the crisis banded together a hodge-podge of universities, hospitals and government departments to try and find workable alternatives and engineer ways to recycle the gas they do have.
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Luís F. Simões on 22 Feb 11

So, which shall it be? Are we going to increase the production of hydrogen bombs, or can we finally go back to the Moon (http://en.wikipedia.org/wiki/Helium-3#Extraterrestrial_supplies) ?

<div class="cArrow"> </div><div class="cContentInner">So, which shall it be? Are we going to increase the production of hydrogen bombs, or can we finally go back to the Moon (<a href="http://en.wikipedia.org/wiki/Helium-3#Extraterrestrial_supplies" rel="nofollow" target="_blank">http://en.wikipedia.org/wiki/Helium-3#Extraterrestrial_supplies</a>) ?</div>

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dejanpetkow on 23 Feb 11

None of these. Either you recycle, or you take it from natural sources on Earth. Although most people don't know - there is plenty of natural He3 on Earth. it's just nonsens to use it for energy production (in fusion reactors) since the energy belance for getting the He3 from these source on Earth is just negative. Or you try to substitute He3.

<div class="cArrow"> </div><div class="cContentInner">None of these. Either you recycle, or you take it from natural sources on Earth. Although most people don't know - there is plenty of natural He3 on Earth. It's just nonsens to use it for energy production (in fusion reactors) since the energy belance for getting the He3 from these source on Earth is just negative. Or you try to substitute He3.</div>

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The iPad in Your Hand: As Fast as a Supercomputer of Yore - NYTimes.com - 3 views

bits.blogs.nytimes.com/...ast-as-a-supercomputer-of-yore technology phy INF science AI

shared by LeopoldS on 10 May 11 - No Cached

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Airbus Concept Cabin - 3 views

www.thefuturebyairbus.com/...the-airbus-concept-cabin.aspx bio future concept SciFi

shared by Luzi Bergamin on 15 Jun 11 - No Cached

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Tilera Corporation - 2 views

tilera.com/...press_release_091026.php INF gadget computing

shared by LeopoldS on 26 Oct 09 - Cached

LeopoldS on 26 Oct 09

who wants 100 cores ... future of PAGMO?

<div class="cArrow"> </div><div class="cContentInner">who wants 100 cores ... future of PAGMO?</div>

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Francesco Biscani on 27 Oct 09

Well nVidia provides 10.000 "cores" in a single rack on thei Teslas...

<div class="cArrow"> </div><div class="cContentInner">Well nVidia provides 10.000 "cores" in a single rack on thei Teslas...</div>

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LeopoldS on 27 Oct 09

remember that you were recommending its purchase already some time ago ... still strong reasons to do so?

<div class="cArrow"> </div><div class="cContentInner">remember that you were recommending its purchase already some time ago ... still strong reasons to do so?</div>

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Francesco Biscani on 27 Oct 09

The problem with this flurry of activity today regarding multicore architectures is that it is really unclear which one will be the winner in the long run. Never understimate the power of inertia, especially in the software industry (after all, people are still programming in COBOL and Fortran today). For instance, NVIDIA gives you the Teslas with 10000 cores, but then you have to rewrite extensive parts of your code in order to take advantage of this. Is this an investment worth undertaking? Difficult to say, it would certainly be if the whole software world moves into that direction (which is not happening - yet?). But then you have other approaches coming out, suche as the Cell processor by IBM (the one on the PS3) which has really impressive floating point performance and, of course, a completely different programming model. The nice thing about this Tilera processor seems to be that it is a general-purpose processor, which may not require extensive re-engineering of existing code (but I'm really hypothesizing, since the thechincal details are not very abundant on their website).

<div class="cArrow"> </div><div class="cContentInner">The problem with this flurry of activity today regarding multicore architectures is that it is really unclear which one will be the winner in the long run. Never understimate the power of inertia, especially in the software industry (after all, people are still programming in COBOL and Fortran today). For instance, NVIDIA gives you the Teslas with 10000 cores, but then you have to rewrite extensive parts of your code in order to take advantage of this. Is this an investment worth undertaking? Difficult to say, it would certainly be if the whole software world moves into that direction (which is not happening - yet?). But then you have other approaches coming out, suche as the Cell processor by IBM (the one on the PS3) which has really impressive floating point performance and, of course, a completely different programming model. The nice thing about this Tilera processor seems to be that it is a general-purpose processor, which may not require extensive re-engineering of existing code (but I'm really hypothesizing, since the thechincal details are not very abundant on their website).</div>

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Ma Ru on 27 Oct 09

Moreover PaGMO computation model is more towards systems with distributed memory, and not with shared memory (i.e. multi-core). In the latter, at certain point the memory access becomes the bottleneck.

<div class="cArrow"> </div><div class="cContentInner">Moreover PaGMO computation model is more towards systems with distributed memory, and not with shared memory (i.e. multi-core). In the latter, at certain point the memory access becomes the bottleneck.</div>

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What it takes to be a team player - 2 views

physics.aps.org/...PhysRevE.79.066117 diigo

shared by Christos Ampatzis on 18 Sep 09 - Cached

Christos Ampatzis on 23 Oct 09

PD's article presented to the idea storm: "They find the data can best be explained using a model that says an individual can join a team if she/he can bring some new, complementary skills to the group. This interpretation goes against the idea that an individual will tend to mainly join-and remain comfortable in-groups of "like-minded" people."

<div class="cArrow"> </div><div class="cContentInner">PD's article presented to the idea storm: "They find the data can best be explained using a model that says an individual can join a team if she/he can bring some new, complementary skills to the group. This interpretation goes against the idea that an individual will tend to mainly join-and remain comfortable in-groups of "like-minded" people."</div>

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LeopoldS on 25 Oct 09

nice article according to the abstract but can't download the paper (can we from within ESA? do you have it already downloaded - would be interested in reading the full paper - can we apply this to behaviour and size of the ACT?

<div class="cArrow"> </div><div class="cContentInner">nice article according to the abstract but can't download the paper (can we from within ESA? do you have it already downloaded - would be interested in reading the full paper - can we apply this to behaviour and size of the ACT?</div>

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Christos Ampatzis on 26 Oct 09

Yes it is available within ESA's network - I have it anyway

<div class="cArrow"> </div><div class="cContentInner">Yes it is available within ESA's network - I have it anyway</div>

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