https://en.formulasearchengine.com/index.php?action=history&feed=atom&title=Principle_of_maximum_work 2026-06-08T15:21:42Z Revision history for this page on the wiki MediaWiki 1.43.0-wmf.28 https://en.formulasearchengine.com/index.php?title=Principle_of_maximum_work&diff=249888&oldid=prev 2014-06-11T13:52:32Z

<p>Reverted 1 edit by <a href="/wiki/Special:Contributions/59.88.4.142" title="Special:Contributions/59.88.4.142">59.88.4.142</a> identified as test/vandalism using <a href="/index.php?title=WP:STiki&amp;action=edit&amp;redlink=1" class="new" title="WP:STiki (page does not exist)">STiki</a></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:52, 11 June 2014</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">&lt;!-- Deleted image removed: [[File:Quark spin yellow</del>.<del style="font-weight: bold; text-decoration: none;">jpg|thumb|right|Nucleon spin structure]] --&gt;</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Hi there</ins>. <ins style="font-weight: bold; text-decoration: none;">Allow me start by introducing </ins>the <ins style="font-weight: bold; text-decoration: none;">writer</ins>, <ins style="font-weight: bold; text-decoration: none;">her title </ins>is <ins style="font-weight: bold; text-decoration: none;">Sophia Boon but she </ins>by <ins style="font-weight: bold; text-decoration: none;">no means truly favored </ins>that <ins style="font-weight: bold; text-decoration: none;">name</ins>. <ins style="font-weight: bold; text-decoration: none;">Office supervising </ins>is <ins style="font-weight: bold; text-decoration: none;">my occupation</ins>. <ins style="font-weight: bold; text-decoration: none;">Doing ballet </ins>is <ins style="font-weight: bold; text-decoration: none;">something she would </ins>by <ins style="font-weight: bold; text-decoration: none;">no means give up</ins>. <ins style="font-weight: bold; text-decoration: none;">My spouse </ins>and <ins style="font-weight: bold; text-decoration: none;">I reside in Mississippi but now I'm considering other choices</ins>.&lt;<ins style="font-weight: bold; text-decoration: none;">br</ins>&gt;&lt;<ins style="font-weight: bold; text-decoration: none;">br</ins>&gt;<ins style="font-weight: bold; text-decoration: none;">Also visit my web</ins>-<ins style="font-weight: bold; text-decoration: none;">site clairvoyant psychic </ins>([http://<ins style="font-weight: bold; text-decoration: none;">jplusfn</ins>.<ins style="font-weight: bold; text-decoration: none;">gaplus</ins>.<ins style="font-weight: bold; text-decoration: none;">kr</ins>/<ins style="font-weight: bold; text-decoration: none;">xe</ins>/<ins style="font-weight: bold; text-decoration: none;">qna</ins>/<ins style="font-weight: bold; text-decoration: none;">78647 click here for more</ins>]<ins style="font-weight: bold; text-decoration: none;">)</ins></div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">'''Nucleon spin structure''' describes the partonic structure of [[nucleon]] ([[proton]] and [[neutron]]) intrinsic angular momentum ([[Spin (physics)|spin]]). The key question is how </del>the <del style="font-weight: bold; text-decoration: none;">nucleon's spin</del>, <del style="font-weight: bold; text-decoration: none;">whose magnitude </del>is <del style="font-weight: bold; text-decoration: none;">1/2ħ, is carried </del>by <del style="font-weight: bold; text-decoration: none;">its constituent [[parton (particle physics)|parton]]s ([[quark]]s and [[gluon]]s). It was originally expected before the 1980s </del>that <del style="font-weight: bold; text-decoration: none;">quarks carry all of the nucleon spin, but later experiments contradict this expectation</del>. <del style="font-weight: bold; text-decoration: none;">In the late 1980s, the [[European Muon Collaboration]] (EMC) conducted experiments that suggested the spin carried by quarks </del>is <del style="font-weight: bold; text-decoration: none;">not sufficient to account for the total spin of the nucleons</del>. <del style="font-weight: bold; text-decoration: none;">This finding astonished particle physicists at that time, and the problem of where the missing spin lies </del>is <del style="font-weight: bold; text-decoration: none;">sometimes referred to as the [[proton spin crisis]].</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">Experimental research on these topics has been continued </del>by <del style="font-weight: bold; text-decoration: none;">the Spin Muon Collaboration (SMC) and the [[COMPASS experiment]] at [[CERN]], experiments E154 and E155 at [[SLAC National Accelerator Laboratory|SLAC]], [[DESY#HERMES|HERMES]] at [[DESY]], experiments at [[Thomas Jefferson National Accelerator Facility|JLab]] and [[RHIC]], and others. Global analysis of data from all major experiments confirmed the original EMC discovery and showed that the quark spin did contribute about 30% to the total spin of the nucleon</del>. <del style="font-weight: bold; text-decoration: none;">A major topic of modern particle physics is to find the missing angular momentum, which is believed to be carried either by gluon spin, or by gluon </del>and <del style="font-weight: bold; text-decoration: none;">quark orbital angular momentum</del>. <del style="font-weight: bold; text-decoration: none;">This fact is expressed by the sum rule,</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">:</del>&lt;<del style="font-weight: bold; text-decoration: none;">math</del>&gt;<del style="font-weight: bold; text-decoration: none;">\frac{1}{2} =\frac{1}{2}  \Sigma_q + \Sigma_g + L_q + L_g.</del>&lt;<del style="font-weight: bold; text-decoration: none;">/math&gt;</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">The gluon spin components &lt;math</del>&gt; <del style="font-weight: bold; text-decoration: none;">\Sigma_g&lt;/math&gt; are being measured by many experiments. Quark and gluon angular momenta will be studied by measuring so</del>-<del style="font-weight: bold; text-decoration: none;">called [[generalized parton distributions]] (GPD) through [[deeply virtual compton scattering]] (DVCS) experiments, conducted at [[CERN]] </del>([http://<del style="font-weight: bold; text-decoration: none;">wwwcompass</del>.<del style="font-weight: bold; text-decoration: none;">cern</del>.<del style="font-weight: bold; text-decoration: none;">ch</del>/ <del style="font-weight: bold; text-decoration: none;">COMPASS]) and at [[Jefferson Lab]], among other laboratories.</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">==External links==</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [http:</del>//<del style="font-weight: bold; text-decoration: none;">www.cerncourier.com/main/article/42/1/16 Polarized colliders may prove to be the key in mapping out proton spin structure</del>]</div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [http://skipper.physics.sunysb.edu/~abhay/ Dr. Deshpande research webpage]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [http://na47sun05.cern.ch/ Spin Muon Collaboration]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [http://www-hermes.desy.de/ HERMES]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [http://wwwcompass.cern.ch/ COMPASS]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [http://arxiv.org/abs/arXiv:1209.2803 The Spin Structure of the Nucleon - Status and Recent Results]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[Category:Subatomic particles]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[Category:Particle physics]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">{{particle-stub}}</del></div></td><td colspan="2" class="diff-side-added"></td></tr> </table>

en>Mdann52 https://en.formulasearchengine.com/index.php?title=Principle_of_maximum_work&diff=14622&oldid=prev 2013-07-29T17:38:34Z

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en>Gilderien https://en.formulasearchengine.com/index.php?title=Principle_of_maximum_work&diff=249887&oldid=prev 2012-03-13T15:37:49Z

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