CINXE.COM
Just a moment...
<!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,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);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: '91787d94eb8b4d45',cH: '81acO09m6ZigZsuDmM_vtmqqxpYvTEkAj5lgjRAO82w-1740494846-1.2.1.1-6vAPf6xrQT36tcwatPACU1fGwAiXoieLbuuXb9T_.82NLxW75UhOJdm8dm8Dg.7H',cUPMDTk: "\/search?q=HfOx&__cf_chl_tk=j1pmaS4rJap.KIJTD.eIE8if6j_Lz.j6OR.sX8jufXg-1740494846-1.0.1.1-pmJJnMgzC9Y34cJUKjjnDowMy7f7k0KoW9ximlTjXSw",cFPWv: 'b',cITimeS: '1740494846',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search?q=HfOx&__cf_chl_f_tk=j1pmaS4rJap.KIJTD.eIE8if6j_Lz.j6OR.sX8jufXg-1740494846-1.0.1.1-pmJJnMgzC9Y34cJUKjjnDowMy7f7k0KoW9ximlTjXSw",md: "8.pjd8cZ5fmVZRdP4Pgo5OeJiOy0grphgu1R0HtqI5Y-1740494846-1.2.1.1-GLjd6_dt0YXGkvducu2mxoMrIZBGMR8G5W0eDwm3Ia0LLYZK38P2IO6wUqlB.LbiHdTFg_fKPFa5cwnDqiDnzOVnrZWvnQDIYW.lVnNEwwWCl2hQxympbd1smTvUf3LunTkYXKau0OLwJMF_3d13DG1xXmmCbibagYo5Oou7m07QnYb53yBV3VoXPQtSb9bNGfIc_EmOqDD3iNcj_raKGar85PGv_ML4.NxMHzBFhilN5NGGadcnCJeGmeCMNaV4Od.xkhcGODmCFm6Bv3Ni3rreC.UjZOdPMd1eY4rmiwpTlrgJR8jpI2zox2yloEDTLWEfiw8QoVsMeSgCeXkSObJ0lpQeX5.._7KfdxvlqB3wRzD9itVGyMVsXqBEBgAFS68P2UdN3oTltBDRRvtMcI_X1Th9xnmTeBToXX5c68Nde1VeBmjLnZRL2XCyCInNwJlJPyqYcdbbAgV_6oVNUBSivcKPbNlH5Z36L5gBOcQmuZUCvwihVfrfgIYU3JgcHnaZnvhMSDpoDv7KxG2X34REj.CbBpkSI3jmzxYqKEjKh4A8iVibKzcfimYNjZ1pUGBBydFZe0XYIsHv6KJ8mviHRTfOxMGFIu1wwQhS1ECkPT0s1QsWRMnZwrEal19ywcMqByxT6yO74V8PYDa4qwgzpeOuJlL_O3DNeMGORfdv8hxrQKSIPDK3zqeCzPlM_u89vglgWW2xqHyTq_JoHw4ROJC4rZJuYTALBDW2Wk0lL29JVzUZZ_Gqw5dZLpAPq_A4z3mBvQhfsD2uBX4yS6cADbB3aijID3oFvzcIel8PFNfChW9ellyF.j5q4srq11I9bDbVrsPKapl0GgHbR_5yAssDJoTzBk_B85iHLUv2eIIW2hLvmyrhbzJ3lN64dlfju6kTzcbLLjuArr8HwYPlQnJ8s4oNPsxvDxO91nFBv3gtVNRlmRUVjfVc7.C5xef7fdOgyymA.R_TVI5s.thTa74IIuui1mhcAIUcWn034kZZDqN5HoBjitikSJHBqFWgI78CzUFM3fDTdECsnQqcXqVc380_v6MzmEfP2QDY0tD1ZcbqhrQL_iwZ8TbWMfHKDmrumbzCZUgCwsoCzo_6Fay8CcMqKg1IBNTT0zs3kx4L6XPGpwVfRtlLCeFfkolIi7UcSRKM2gQaDK0vysM3jUZbg64TT8FmOzLkIkExrTHyjcFJZXRCq5HqWpio8cTLtSjsR976MDjYEqwB9wcbLZT0ZAvyE3mylLX4KYf2SUwZElNOrl5kV56vHoel1Klc1pGHCKZq4xD86HQZ4_vSNOplPcopNx1o7hW_Iu29dMY5_uFVvZnrrt9s0rTQR3n_YlqDrQiXOPfDoqsULvn9MhkJiB8kJEOrTU6SzO55.9jTTXlK.BaBmScdz82yYjNfLi2jhCwvksGs7m9vpOrXGASMWngXQjB1MpGfgNcEESdb6Vnf54C8zrRKlAzdDFYQn_IfI4VEBvhgAeyopCeeWEsyItbmomDo7jVTWr11Y4pQ23PeTVYhhYLYrxSdnrxI34FdAu1XV22PBc5NL0HrbT_6NhkMxpix.rNJiBGIUwSeoKDBxlG3gQoHlQTmd.gXxSzSdWoC7kxquA371D0..iuazhRx.KtPrYEgc.dd0HICIQGTFQoYQNwpImFFA8scpaMnUqL9CqJlxWDbemV7f4F24wdKlxttkBtJ.8QjIHmg5SZrVviW3WhkPdlny01FZ6xlC0vlKdsHX8KJz5OvQmNYZtGBjTAfZi7ag78eA1hHv5DbEMwZTJIqO1jCiM80ovjwhHHQ_wi8gBrZ21JcJvYsDPXce4DarII39ufctOkgEx7L1tI3D4k1nOEq4inbTam5rIY1UXYdrIY9uGSK2bh5USrkt6a8lmCvx7U",mdrd: "HNYImw6kVWAUSfFqsoytG18cMM3m0Dcsf8n2agBXJ4w-1740494846-1.2.1.1-3edI3PEiAQhSmFn2ZVz2WdB4ZysgM4M26rS66L7oPUQwcIOs6g2CXwuNrOYbCjqo3UWzFCTU3C3x9MUr0g8BT8SKfgOMW41qFWUM7H.4H.eLnbrKzs.tNj9twDAu6FuLROrQNFx3_2ZHolsfgJwsBkINdOYFy9c5Wiz43tM2muGabaWywumAKqd6wEdzxbC.18q8JfFfAK..pDwlvbygsp6.UlcQqvqToYJpz5yAq8qJsuCaEH7Q8PxJuI.9Ex1rDGv7m6sQa.ikuFcUT3afaUA98Sw4tXw4rybGgxWuJa8sstQXag9zRa2ni9U4KqGhoe74qdKSyc_6w2CsJfBLziarbXiPtdnPA0NkBu3iuryTB175YoD3tqGhZ4zFo0gwJEbvFo.HWlzqMs2AUeqfWPgIU6QQbJBSUZ7nOC5Cm5MPsuLEWaHND8pUibMMDMG4VGUXSz7ryD3IZlwVZQTuh5.snFfMrilLJjFOniI0EstVueD8kVkX_T4HdBAXfYrp6zIyyIPM1ceMn66rHomdDg.MRjV8LDJ2RiQ4Ni2yVKBpHzLF_4lpLafCXrK8ukGelMceJ_SK1_kb3fcj6QrhPdjkUUwJ4dQA7EomylTnUPdcmfk69iwuARWW691HTz0AIl16JqDuBXbE5nJpCzF_eyxp6JZZbxuBP3f.jB2EAQmkdmC0lOWW7zFTONIV6hC.2POVa7gHUxt4PnxhddWFNCy_e906Bd9.9xnz3KB8bA_NmyBSehEt6rAl5qEaFmdQTNli8t8FSmbFXDgifLpPLsf5dxteWgHyjXNU6o0eMCpaxjcNse79Hw7izxLV1d5taNWy3NGg7h8h8nVWoC34U9B9IUe84IzaZIv64Ev0PuRK3yetCq_6X68OWarwDfm4X_zjGgb5sP9dr8kp._XpA3Q8_gyxF9KCo2prU01sLfpmbZsu4S7ycRIviVyy49_wEcefsnZE1..anNPbcoZbZA39eQADW82X6vwD3hX5vyddQlEmNBpRqEbH0FRPhjhX15yMnO2owzGXwAxtugHZzbiTFIJ_e81qNqQ73JaYoz23.OYrHnckZO22FxSUkRhztk5PZtPqx85nLLaMSaWamoc6DwYG6RDEqxloVL1z1P2ZzPrFPRGv8.7zyf3klwSzJn5lPSTCC1tK.f8SHM7aM_AUFUdTNkne3GSShKA.L3iaC8D.v0cu1Ffd__ZlFGqAokUbx5wwnWZ5fpGmnTg3sbm6uXGY.sxgeK5TCC.fI9gKtR3bIVHIjYwFOt.P3ChfJbi4Gff_03l15R_9oQ8P_Fhi8gFJRUPYZPdPhs0qMXW5KpYsGTp0D6KLzNtsR1tdI_umgBg._vgyERJE2pbkUcLaoBjDv6aTf15e4L1twSVpWiXX6.d7oS_ZmirbLItsOjBlJVcrwixs0hI7Riyr5fazlD9FA_OhRT4L5DBINH_.TjHq.Hz4_DBLddrhpMg5fmd8S_QvbKY48wFXYv4B3Ps.9Yxi3nh1PDCXtWhqjG3SVV8Q_0gOGfAfM4xvsbMgncMW7p.vyP6l7pIZ.H2rAaomoETCW4MJWze.QQDq_N85p1CDjo8IUq2LDT8pE2A1iY0ce0eFOsdSaz2GIQtkLRNviw6.mItPFOmH6lnlzHzUQvi_rEVFSMd3K8suIRnVZ_p60y7Baafe88RGn2j26h6zrCFqrpidvDupVaYytP_kKIKEaFlN1dCHvu5iqvC4FO8vjvnhhTD_0WHz0SMTBEBs0FMeo0uEXdkwXdMKF56MJh4wqN_122Q27IEjAWhKcn7bVBwCpDx_Doc49o0BecLrJhFnvYq7Xsdpk.5FlAUnkuLXF.eYqGFqLXXhU.DMbxxFD3wgIneIV0egGu9UMwIVNPukfFfokbhBYMyfB.nWxHETvdh3MX.8ecyOeXsPlsPTsAOIw7NV89tNmoT2Ib63EjTXxSGw.bJiDTqVIZ8nZJEjB3zRMOseYJScgox9"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91787d94eb8b4d45';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, "\/search?q=HfOx&__cf_chl_rt_tk=j1pmaS4rJap.KIJTD.eIE8if6j_Lz.j6OR.sX8jufXg-1740494846-1.0.1.1-pmJJnMgzC9Y34cJUKjjnDowMy7f7k0KoW9ximlTjXSw" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>