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Updated Thu, February 2, 2012.
601.www.forumsocialmundial.org.br52900
602.www.er.doe.gov52800
603.www.aiab.it52500
604.www.uea.org52200
605.www.hmi.de52000
606.www.shom.fr52000
607.www.talkorigins.org51900
608.www.badastronomy.com51800
609.www.niaes.affrc.go.jp51800
610.www.dinosoria.com51700
611.www.dmu.dk51600
612.www.heiligenlexikon.de51400
613.www.informatik.uni-kl.de51400
614.www.lexum.umontreal.ca51400
615.www.roscosmos.ru51300
616.www.govexec.com51200
617.www.tlfq.ulaval.ca51100
618.www.archeologia.ru51100
619.www.delorme.com50900
620.www.systransoft.com50500
621.www.aaas.org50400
622.diwww.epfl.ch50300
623.www.physik.tu-muenchen.de50200
624.www.studyspanish.com50100
625.bioethics.net49800
626.www.agroinformacion.com49800
627.www.madsci.org49200
628.www.rinconesdelatlantico.com49100
629.www.netl.doe.gov49000
630.www.ecoportal.net48900
631.www.biodiversidadla.org48800
632.www.aplusmath.com48600
633.www.amf-france.org48600
634.www.cnil.fr48300
635.www.cnes.fr48300
636.www.binoculars.com48100
637.www.astrored.org47000
638.www.rws-verlag.de46800
639.www.keldysh.ru46700
640.www.acs.org46500
641.www.math.chalmers.se46300
642.www.bur.it46200
643.www.esf.org46100
644.www.sote.hu46000
645.www.astropa.unipa.it45400
646.www.ittiofauna.org45300
647.www.greenfo.hu45300
648.www.wzw.tum.de44900
649.www.herodote.net44900
650.www.ccas.ru44900
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613. www.informatik.uni-kl.de

Rating: 51400 points*
*amount mentions of word 'www.informatik.uni-kl.de' on the other websites

www.informatik.uni-kl.de

FB-Informatik (TU-KL) -- Fachbereich Informatik der TU-Kaiserslautern

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Famed Tasmanian devil euthanized after tumor found
By KRISTEN GELINEAU 2010-09-01T07:44:54ZSYDNEY (AP) -- A Tasmanian devil named Cedric, once thought to be immune to a contagious facial cancer threatening the iconic creatures with extinction, has been euthanized after succumbing to the disease, researchers said Wednesday....
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Europe plans large lunar lander
Led by Germany, Europe is pressing ahead with plans to send a sophisticated, unmanned spacecraft to the surface of the Moon.
bbc.co.uk
Quarks, gluons and jets | Jon Butterworth
The LHC paper I've been working on for the past few months is finally out. It shows quarks and gluons doing what they should do, and I love itIn July we (ATLAS) released a preliminary version of our first jet cross section measurement, and showed it at the International Conference on High Energy Physics (ICHEP) in Paris. Today we submitted the final version of this measurement to the European Physical Journal and to the archive."Cross section" in this context is basically a probability. If you fire two footballs at each other, they have a bigger cross-sectional area than two snooker balls, so they are more likely to hit each other. A "jet cross section" is a measure of how likely we are to see jets when we fire two protons at each other.Jets are what quarks and gluons do when they try to escape. The proton is made up of quarks stuck together by gluons. Most of the fundamental forces get weaker with distance - the Earth's gravitational pull gets weaker the further out into space you go, for example. But the strong nuclear force is the other way round.The force between two quarks actually gets stronger as you pull them apart, more like an elastic band. When two quarks in LHC protons bounce off each other they head away really quickly, feeling almost no force at first (physics buzzwords: asymptotic freedom. See this Nobel Prize citation). But at some point that has to end, because as they get further and further from the protons they were knocked out of, the force pulling them back gets stronger and stronger.You can think of the quarks as being the ends of the elastic band. They fly away from each other until at some point the band snaps and two new ends (new quarks) are produced. Eventually, we see a spray of hadrons (particles, like the proton, which contain quarks and generate amusing typos). Because the initial quarks get kicked so hard, this spray is collimated into a jet, and despite all the splitting and production of new quarks, the direction of the jet reflects pretty well the initial direction of the quark.ResultSo, what you see in the plot below reflects the distribution of quarks and gluons scattered in collisions at the LHC.When we collide protons, we really care most about the collisions between the proton's constituents - quarks or gluons. Unfortunately the quarks and gluons only carry a fraction of the energy of the proton, and we have no way of choosing how much. If the fraction was a half, for example, then we would have jets with 1750 gigaelectronvolts (GeV) of energy (half of 3.5 TeV). But most of the quarks and gluons carry much smaller fractions.To have a real measurement of this, and show that the theory prediction (quantum chromodynamics, labelled QCD on the plot) agrees with the data, is a real achievement. It directly involved dozens of people, and less directly hundreds. One key component is the energy calibration which I described here.This result, like the minimum bias results, is part of finding our feet in the new energy regime of the LHC - but these collisions are much closer to where we want to be. And we already have about 300 times more data to play with than is shown here, with more flooding in. We are already using these data to look for new forces and particles (see here and here).PSWhen we put the preliminary results out, I wrote an earlier version of this article. Unlike the data, it changed quite a bit in between! In a good way.Jon Butterworthguardian.co.uk © Guardian News & Media Limited 2010 | Use of this content is subject to our Terms & Conditions | More Feeds
guardian.co.uk
Video | Learn to speak chimpanzee
Ape actor Peter Elliott shares his knowledge of chimpanzee and gorilla vocabulary and facial expressions
guardian.co.uk
Gulf corals in oil spill zone appear healthy
By BRIAN SKOLOFF 2010-10-22T15:32:40ZON THE FLOOR OF THE GULF OF MEXICO (AP) -- Just 20 miles north of where BP's blown-out well spewed millions of gallons of oil into the sea, life appears bountiful despite initial fears that crude could have wiped out many of these delicate deepwater habitats....
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