CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'non-interactive',cRay: '91340714c87bfd96',cH: 'Rtt34wajaT7IWyt3.VCGRPUZ6ecTLBbTnMJnOpebriw-1739776960-1.2.1.1-nRctI637EU9ChHSlAie4T2teDzxoqh5rgbUUWkNC9TZpan372DlXWCSKr_QEUa3K',cUPMDTk: "\/abstracts\/search?q=spin-down%20process&__cf_chl_tk=lBUo3Gym4dYgFchNqahJRgJMfo4BB3JqESs_rs1SEtE-1739776960-1.0.1.1-q4dExwPoMxqloEX6Q2IwBb5AHLvYVCgxMOu._YNA5co",cFPWv: 'b',cITimeS: '1739776960',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=spin-down%20process&__cf_chl_f_tk=lBUo3Gym4dYgFchNqahJRgJMfo4BB3JqESs_rs1SEtE-1739776960-1.0.1.1-q4dExwPoMxqloEX6Q2IwBb5AHLvYVCgxMOu._YNA5co",md: "fSqYtpnGcMHL.VswiGDNnFP.FxtpdnfTu1vl26jRMvk-1739776960-1.2.1.1-SCk7u7EbtcNEklBQx0rZSEDv.6zaNYFDVmzSjUMKcpCARXSCixO8zR3KYv0UKyZQivf_isKxbdmMzFxYVjBE1LWKALQxYy0.kqGvUq9iEdefemjeWMlwf8S3vxb.xPyrHHmLfw9tEcMiROwLidDXbCzfjcsUyGktDpXhgTtEpfSA73.8hqkF4JDscJA17KVNSa5WjILSTi7cNbuj46Z5UhW1_dt53rw5axzu.EbAx3FuHmVs_Ghm.DmKw.YBTgoteOXGmY7ZXeGqB4OINk.wAkqqTOvqxxNbgVuX6.C3wD2J74VOXuOaxKMTWRQSm.CrVcfW1WzRnYqbE7nojr573X5YjR1kGCNIcxpHkPyyT4IzARIkUdiHFOQBwB6Ue8gr4RMSOxiW7AlnVx.FW2hgofKw2X5Hn5GEXZspngRgloUNNjXBonzKC7bE48XwPPve9YVVzWlMWFeXPpdRRHmgYNLTJDbDX8LLt4J3yzGEADQYZHkP2igAs7ujNo1kazHvURUIiI5WfrloRUsI6qVQbeVDy6itOPh1R9hjWLPcHvCwkboFcwioostvHzrvOACqvNR6_P7K9O5whd4bsWkXOV4D8xOQWGyb5CBkuZLdcPU_Wb0K0YL6JBl9uDPc9cmLuN_7aW2yO5hag7USPL_cY56zVHfYPR3Kge8NT.MQ6XgT0n3tGgYfCUEXJaArxsL8RMu2ITuOfdarZkv4Z_qBNDCmt7uRmuVfBQhepHwLBzrURhTzv8UEZ1PjiUYmSJwomxtf58z39L05rIx1DVTO2Z_yU01WdTWuQDLfpUbEW8hlHRy033swR35LTkBHdCZ8p.1NhBOSuqIYs_RR7L1zYfxHBMXyHFx17yBoTK1mVdTQgHLylnNt_k9oIUIgZCYJyCaoY_jyDvU.21cE4pYlS8qRIBfwAKWFaRnIwPq87D1kIfK9.nc03.5kIxkSPJqDT3qlV71LXLpyrERgO44RL9nweTbR7R_pVZLknZHX5LQMD3XU5GT.0.V_a0Rkz1QQuW8AVkZ.qJ1BAKQqgPChpYrTrsPYS2_bNChMYD.NpzwS4dntD.4IXTpmvexug5W_3zqoVU3JwkRSEgvXiqgMSTHSWmbQCw7ONMe6GjTaup0WZB4AkZqRlU6jAqtEc_HRcCcZX4df1T7ALZcbKrGKaYAPFrLWRaMUPiBCf.bTgfdueAFyoW45N2iM1R8DqOPIxpxSO6r9ET7Yu4d9juq.umXA2VJHJ.VdAIi0G1nBZFpT0d9qi.7vnSZino9jnFd.UCf1kMIB0MDkFvZTOnsaGzoxcqsPbc.h.OnEzfpGd8auiv5ZMrmZDdyIIANXGI7smrtKEp3D7DepikWw.KKa3Bsk4bJMbxQHLKrPLITrQVPVBmmg.b2lpgGoKUgqv3bX1OlWTEUkT56HplfjfPFeWu3nQnvktdboRhaf_QqPhYE3QL0tTL9gKJ0UPVIbje.ALsizSKZZgFCNZ8Vik6IcL01l8gnGPSIsjRpkIlZQhDWgEX2OjNFGLn49u5OwWnIAc1hC93wJLmWfSmJBPa8v9erIguPodjGK9zezI_TKMltFUSls4tSE.S4ejZ31Ql6R1792uKgs1HvRCFn0dhpkIHrVy.QO_n3BIhESLjNBCXUGSuioyOxk4o7EAxjAR7itoQssOH1w2Li3XH5YPL5wgI70tCDA6Q.2ILIi2Zk0Zx.W8TpBLHvMD4Zuh.CSOxgD.XSLeGnG_fzYyCRznCSfK.Qm4z7zV6B8CIaWCbxHADpaOS7EXDgwA_Bsgl7yY197E5XHC.ssVnPliuBGBwexDElmrpR47ST8RIGuzxAQ.2pZzxG4.y5dWBoENs8eQ3AkyrpYlYOKLM_z4SNh0wtjCRRn5Vd7YnoQg2Twaf4YPJrCwObjXSBKarRpz1_bhmvv3JE4Uxz9M80Qh4sQo7DmnN.SK9Ckojzkn91NRZJz.hA",mdrd: "0xbgfmi0vTOEIMq4GTWq.h4cv7wAQtDzLPi2od6r2Mg-1739776960-1.2.1.1-BEYUgXQ.Oa7hq1eC8R3WRhAFfLyIQCB7N9rJBfxymUC3uXz5XgDeJ59yi8zm3B1.GVvQntMeN0lNkSGuNRPdR9bFMa4on3AIEIXFfhMBYUNZm7cOKIvuU6Bo7nrbm10cFuMkKMqJUCZxu7rN6yKAhJSJYVtF0c7rYLFC6Ll7Xhnn__olGgvDBypdmFuSDfiX080sEmmfk_KvQPq7ewtSKKy3zb.dklbsceCouYQvjmAJ.TGr4hEdffMa4l6myc3PxlK6NyfFrzw4oTCKuCLphW76fo2fVm4ZkOaalOdahBdyMgdPDggHTKP9GyWLA1wqOtkH_23KDp60IuLm9BXq8q53BW1mQ2BigTpI6EP8Gk.vDyx3JdLbV5Rfo_0ugWRIh0lIhCmfobuuWDE6aTZ4HZM28uCpiV7Uj8EOt91gpq88zO9xGXa5sHZaIC7vxpQy9JEn9TARA7hH6LkzFvHwhQ3lDDVMazUW2XiPeut5rExG.o5FtHqkcMSgZ0aKHSat4Wd5UyyVDf3DBPJ1SLRxFFhVkz9dc53SAIEsQT7dYtFOXbDa1YlQdNNU5ytoL0ZKt45LnnZyHo.OBt5H1T6DK7VOp_LaZJ_ExotHbtSEKBj5ya4CQ0r.1P9n6jiEah66xQUTV4IbEh1fT8TWzWR4tS_lJ_fupD2gT1LCJOUr55Dl12Y3ux3MMhIAvLVA_x41EGsVmx.04AEuMVWil3MNAjR_oytT_CsqcpOHYrt6rdF6mDe4CZ0njUYBGeRKXQwlWshxHlcodEeNxLhjSUeZx3VSnU6gvYhcoC49Z3zTqjZ6A22eAk_Cf_pbR5xB9_6mwsJCmYxjz_vts37EZ7LfG93mEaL0PJRBfpJr9vHYR7HK.7EgBRuKQxS3PGFoBvfW3HTyjZ73chzcGe4CMKDBgFFuYvUMXOk5B_6pRb6F8KBj0oUNs1nJ6XGlTCkCr8u2UXe7b8EicUWiGPwO6yGV4WllbXq0tHfwT9JCT23x3DA6GKba6kHzjDZPWvOPPJzqAbWrm_peXiEL6MId1oIeY4AheJZvG7noG8zAGBUYnlUp8WplFe1PGrlAItskn7BjrpB.e32OnALFHDVs6mNWV5t_b0fq0xffnClb1517.3VBBVtfvzwlcB8X95CkEunIs5To6ILLE.xs_DKHOH9zVA2Og5tRsjlXAV8aqwPxzZQr0ATuYa0wUCX29T6ULm0SiFSDmcLq.wm13bU5XywK3WSnAPbQQutYLoh7Wv18882pk6Qpj6FV5NTIR8aUGFTlH4J6Gaft8QCs36XkMY2jZ5.aPS0gzUM4M5IGYq9tikLUNrBumbECBoUc.RVYnnXFwXCa._4EnYhaeMkrLIfPb2gp4NYwzNVBkn1iRWoNTwvwWQ44HjIYLtrYYuRmQh8bT4FC8PTfw9.nf_Obxnd3x6nNEIN_VjxezmahR5K1han95eq7MaHxYLYlJfE7UDbOtzlRHMeQV3HYB.i.9_oDdMu12a9S0fLQvEzXql7QSJNdvZpJNiBrk7_DVaebTPEgJ_OdAEezQXkqxazXxVlQ8kxVdrQTC2tTzJdZ17fTxtrW.anLpm6hn5s56ptmL0P.2lFqhyjqUBd9WVI3c.vkDbm1gjvN3YrT1gwhwL_PEElj2o45bOHdkiYkcKKL5P_pSlXINWmqs2vYgZ4RA49.Jc2tfHjD9LD6dH_WT0UKhSFmvvacK5tcS6yPAilRXD9CeXmq4Z8jqVdfhdMTyyE8mppPWBuelEOE_tGCYZd_0BASnW5NPXnL6FpxVFnEnKB6DY2h.F7EF8DzFpGZETEfttqz.MVzPi8tcQCy9Q9b6aP_g5X.8da76DrSIcE1KBMFXTBwOQXjTLiqrMvd1hjPWlwVmC.i8H6_LQaqmlycs5Fg.YyT49L2_AlEKo7QOQvRI2W.BuD8sQHqv0OGnW6FOwI_5Et.eWISrjJWTxretByyn3ZJiQts22LHbIOqcYOx"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91340714c87bfd96';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/abstracts\/search?q=spin-down%20process&__cf_chl_rt_tk=lBUo3Gym4dYgFchNqahJRgJMfo4BB3JqESs_rs1SEtE-1739776960-1.0.1.1-q4dExwPoMxqloEX6Q2IwBb5AHLvYVCgxMOu._YNA5co" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>