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,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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="390"></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: 'managed',cRay: '91a168afcfaeeba1',cH: 'uBBMxQy0B6BmiyMZ9P8Y23Ry3htIIjdloSbWh_nrV2M-1740923906-1.2.1.1-VkaHXEdBmq0umDtsO_cXxI1UFSyZ_jAGu1uGLT2aonq3c3NSZChq1Rux8GxDKTMe',cUPMDTk: "\/10004343\/bibtex?__cf_chl_tk=i3Obqk_KkO60O_.cZTb2f2ERTGbVopVMf6tWzjZIiss-1740923906-1.0.1.1-DCIMefE6wrcc_wrYbMCJvANPqpPws0rx.ZBD9mFmgWo",cFPWv: 'b',cITimeS: '1740923906',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10004343\/bibtex?__cf_chl_f_tk=i3Obqk_KkO60O_.cZTb2f2ERTGbVopVMf6tWzjZIiss-1740923906-1.0.1.1-DCIMefE6wrcc_wrYbMCJvANPqpPws0rx.ZBD9mFmgWo",md: "hWw4stPARwUjocI_8YwmDArYsILXedG9Z8PiHH5DGpQ-1740923906-1.2.1.1-00SH4IzWpBJxpOiYGf0NdDtRdaGFj78eOJcul4QjyJJfkKFToM1dazAAAgCs5aF.ooZyBKJPui3ZyUursX5I7seKrkcPSpJxU8l_E_8.VVUC1HDHg7tQr3lnLiI3otfXGg1ip1.lJ2dD3JVsX9PLY_nWfcTAkye12IpThGZ.ct0.nVYUcrrL88cKjqvU.Mh7MlJT.8E4CmxFvUaeUpJbQ1TwgEcNJEroiXTMvV7wn_gs7HRa6u3vvZXvlW8pXAoMLSW6jLJMCfppEmtIjcNP5iEACo4O0VuXw7fbHrxmhgpPvnX5T6CvyFS.EfmBZIoC9XECfKRHVEjsd4m5ljHrxPHRJ2MAkIpUJZJX4DArapixuLGbka82SmdPm7zeoY.ZkgeOlErZTul.fMNUS5cxcqgIXKqUbwLsgwAK6EHgDkdAZdrS.t0dj0n4TX3mwlY3U7MNeYwLBnFNAyNJMPpuSnNpvg7RyhpNo4pfHU9a9LqwN741V6BIjWo7j3spygchQmHw2BilMNc2crvZuD2jWatGmJKHrNe8mxqPHn0CjA_5nYGroo4YUDnkTmUhjMVh464DQW2TSe3q3c1g5OfWM3uBKusauOxuBu7rVyDOJUtUiRGKpzi8RdhxQbRy3ehHgFyeX54JH_YpGCdjaaMve91omqqf6iiIQAw_OojoprwnFpnCr8tE3YR_rtGLHeapkcTla6prQcoQdlTc1IAO4XP_2VxocdsmJtyjNwelvnQdtHvzufR0VKrX3qciYOLtqftQe_1zMg3CtyV7_G61Qg7cHsEF3nRZRWf9Jg2ctZUzECXPUgK7jAABbbTSMU90DW4FqZFjXOCbSBg2nQXQ1X.6p0HsiEXd7mauCyj73JQzdPjQVHVoAA6E.7HaWJdIzfEfDoPFthrO5gdBLGXhk9tXicrbO0qvEpnhNy1F_f1LaezGBm_gNIwnfbCINxmIWEi_J64el1FlVV4v4uEsn3neS0o5fNAb.CB0eLfAv2JlcT9R9NzgSTOI4RAZbw8p11y21iyGw7HUd4wvIcjTs.E8YsHwSvPeePU6Wo1aI1DDnSSvve2KuVupc.3FyA_XpgfvY._l2kz8Md.DmUZhVsPOQMtithqYNb3k2ZYeCucao3_SiyFgqHdPhJDOEk9SRNZdZ1ErWjh_GQCsv32fd7jMtgizsUCemqQprNUrZrmNvrlPKhKtPLFM77AJL5fLeEslmlTyoO8rmoPciaEFkQ",mdrd: "i22YUSJuRij.n7PyQc6ZMC2nc6pFWekrT6y8Kpz2Qms-1740923906-1.2.1.1-xS7pgTlI5TzCkFJ7kQf1DY3_nVCt1zwX3Q0ALqEaMEzeCtVxkNxao.2rLzQUBK6Cc0DTwTJ0uEuWk2c0i106C7f39z8iP7P24ZR4uXXlVU0HfamhYJZzygC0wEarvdcoBpJMvYe3fxPWO.dOuO1IhW2XKl6Z166OgtuurUB6zxuIglYOQQbnZhOQDfamrQVm_Z7prwJ2O_Y5C_YUJj2RFhE.69YxpLIfQMUgxGoooAOSNdqiXRXDOSrQAXhEne8d_Q5.Jhe5hp4K3kEAPCSXuchvSW3.MPg0BrOP7sE54VE88uhNSFcT5dwUC4yNJrB.gKMJrh7aBswZxpIcK9J_G7QI9Bzh1oZaHHGQaJC_MFIQjS1eEAvvMdc1coyhWFuOU7LQU9QjPtRhUIpO_IVOvR0gn8fC3GVtPeTLmC7PE51pWc9NBcBZkhL19pHRnTRUDJNiiq7Rocn1tp6BJA5SPwD7hDbZoccFxcG.dBAwV2s_5PoaYLnMivGo5MQ8uPGY3rLLbKKbad.jN0giE8Krli3RO6nqYZq.vlHVMLAHXWPb3gLueIoi42CJcpcE97Xrvpt5I0KXC7izXCAcQ5WrMLX622aLNE.ti3ftl8y3vI3u4YczYY1AwERF9D46BumdxFzkLc3j0ZKPIozr.ayCcl0w_oDAJ18hxrH4q8jDtVxMU9xsNc7JgzhcOue2eQs6J5HuhzdsyGxK8Rw8xeeWVOS9DBcmgtsfmViTznLrHfxh4oAcOSLJXI5DPMTM2EX0yNF7_jcw4bTkxvVSFpPhmhDjw54T8ndWb5UtQtgHq9JMBMplW4.dJg3M.66Nl_ih8sn2sVol3ITShCj5z6pZ9Y0ysnvu8WD4abLAMDKChx9fLPOYcdWB_1ezyh4OyKvPc52f3xhHopMZAkvhjpmthWVRnN.h04x6kZxvbqOw7uOp2CSZUATouTRkuvTHxMzOw9LlX8gr1GScdYL8DrtTFDdXH3eLFKwaTATzcqYF5tzsfao5lD3pwFlb_wAxZykcHg5Un.nIiArJXW1YEJVBtp2dkPGpmbcgJG6ka4NSOHEO5GuMOONxcCF29sPrWU4DmJsy.pgRVAwwAiRuw9dMxuSkRo3F6cK5CbR1rA1K62d.e_PZhtn5m4Osc9a.Z9JFYg6wYBh54K1SpJzdMUFC6e7CgVvAwEySEsRAmj456hxFdx4EBbzoarCjxUo5KsqTN5GRHGJqyDsKf32UMxEu9HhWiwJ_LiFkS.X0jQx2dse0oWrUZHYkE6BAbaX4wKBQ3rZWhGTdvaE4yrkWjKvcDB6VpBBKz_2Qez_V6u1ozol1P1PPuOnqrkIgxVQiuw56IZuUDIjE6k.aj5QsrnbAfva0FVnrpacSAtU5UvH3Rh0jedISdcqu57yUigaTJx9.VDXuk2RRMsIQntvd3ui9ShReXqVVzp1Y74dLdkEM42fHkiogPsq2aF7RoMkf5KB70DEUrLAkTJ0_ZIsoUp9HkMwtbfwcptB3xtBb.LDmMNllj9UKFaDYDyuFfXP2bqD3GISief.uB2_qgoudK8qNEfnI2nWohAD5RVhxk79aqUdK6GEAP3vmivAoS2cUnQKA6ouimk3ttuPkxC5mZOIGqEbLmp66sXSuDI0MDoRlnnMLuU7GxkDjcmg8DTbPm6pQTovbLd.VWwEO4.k3tHmXuzHS2KxiiWbrxvSzTbF0trad6oQom01ZK0uvSrnUU9O9PJW9RkJQL5KpU5HvgSZ2xYK9oB1Lwca3ug0Qsxr1KJ_a0PnDc3AK8_Bou56_lC9TFSWoSGi4cYLnx4u2uV0uiz9ajV2AVDptX6Ukr2Dgd.T65lQpDkcHkIjC7zVo._bKANdhhhbvX0VCbVpVcOuT.zI2hPg0BfBDzItgS25PDofk2yQSYHatlO.QwSTyNy7tnkwDE97Qdtct33QqBk6.aV27y50l8SOMDn5mNbHDFuK72HozJphnK7zNwuNAt1Ag"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91a168afcfaeeba1';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, "\/10004343\/bibtex?__cf_chl_rt_tk=i3Obqk_KkO60O_.cZTb2f2ERTGbVopVMf6tWzjZIiss-1740923906-1.0.1.1-DCIMefE6wrcc_wrYbMCJvANPqpPws0rx.ZBD9mFmgWo" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>