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: '9134fa9f2e64f938',cH: '80ZeG1H.qgUJXzgci4Yu8WbRR6NH66x6fo8nS43ZzVw-1739786936-1.2.1.1-AsiXscfr4btTFKSs7NdzTeTh7T.5ZvwRxP9roVOMAVRrTKbfrReXZyVMof.I3das',cUPMDTk: "\/10007625\/mla?__cf_chl_tk=BGZjO4ta6e3cOZjy74mERknZ5kZV0RfROPJbGmrqZ4c-1739786936-1.0.1.1-JYWYTeMXhbBpyG4n2lnmjch.QFa4J3qt2ltBUnCV1pI",cFPWv: 'b',cITimeS: '1739786936',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10007625\/mla?__cf_chl_f_tk=BGZjO4ta6e3cOZjy74mERknZ5kZV0RfROPJbGmrqZ4c-1739786936-1.0.1.1-JYWYTeMXhbBpyG4n2lnmjch.QFa4J3qt2ltBUnCV1pI",md: "ap4fNEGhr0xiXwvMuHEM8AB7oFQivjQ9kQpPmwwy4RA-1739786936-1.2.1.1-ZMajFK117NiAzj3SRbd3YBNRkIUQVkZME6__GUq5OLxqMWsE9JjcAufRCdEE.xkAN0v42a7jbuciUxEsJQjGJIZml6RpKoMaUc7cuU.Z301FoQ5clt9exmi2kdtCUtGw203ZOdeosN_8i2fte3oW4t_0Vziivxrgq3h7EtC8zqsK3EhYbRuR.WV8ZAE7LF9BpNg3azhyroRnYbZfL_sZUJRi7YwD2q_nkKsv4gw7CR0vUgmCw_PqGeWznw1lWTz1_e5VveR9lshGJe5rO0L.sj8uRc3mftAjOEviZHytdeh.5mKC9XHiMNqEdnSw85Pdtj.OMl53nj1i6Lp4p6pd0BB6_bsim3JOBxTsylCC3cVK_TzoTvJeCXaf_2Wbfqd4k3KqZyTgq6BbnLwKMfrLP5GzN7qll8_7b7.TMm7bGlp5cWaPTA_Ve7hZtOzBTJckEiu54LnhXevrhttNr5eChqRUGAyCwy3SQWigdNf8pZrFGLp9TjxmJLKgUrOPAo4hKY.JyUnvbmi9dEKkyNYSz8DGY1R.3SBz1pgKJoSyHVzw3mJ_ivGrVzp0GcjMbIfK57KnbptcpuAYB7.yjoMqLkI21aJ.lL8I8R_MvFShF_3REgM1zFGeVVwLw3u0LbSXIhEffN2p604HUWP7lD.ekAA.rAOpoElTNS71JR4CWyprnC1_g.TU01mKnQJZoNM4oi8elSgCO.chpt4DkY_PNZsz8BrcalSut17OBkN8TcP47TtzpUeRuA55vGKTgnXXs1ixnu7adMiuqPMWhzFZMegFfAGWVpb7lQBiT0Tt3fgDI2hKh6SW3oVWgu.R2tIldeVRsNYeAU3bkat8I3jfYe7ptYbUTTRvSES8NHz_XwCEOI7MDDYoFIv0d3rnRZV7nznsxZu5h7GE3HcztLnuKfhO3nD6X2I7y5f3kK2YkCKGJYihcrfd2TQ0Vm.JEmmxTHW0eq1._FfT668IkVQ_5Rb1NLDuZtaD4cXbNhiCyPejGQSzxhTjOTaETJwYDCmFVeyXNSWkv_ozNGbGBcqYa7w3mSavMT.BT5xaffsSK8YZ__ScqeSaa4X.M7.iCF5I9.ODy7B8M2usS0LR.GZJFBaKw.asm4Qzk245vxcpbk4rrAAFFUF8p..gJm.zfBfgIoxQbe3XPtJg9pi_hSsxQykDrTOzzPjbeVqwUzG_GCZXMBz4FQjgioBpjN7ORcgkH23TCygvS0OR81JmbiiKuYAewnHNHeoh52jDr3AlOPviuLRt.qb5M1l9HfwFbHpnNJGjNKYWHR46wtQOHyd44I9s2YMQjiQpPjS_YaGI8egjVpysOMlAg0iF3qMJIWrwUeTKT1wlCJVMIm3r_WRwnA78FRK5Xz8dbuOEQxz_IV5fiLFKERq5uU3jQBdlEBBkrVaZBeaEC1INL83cteG6NrFYsaqztlsbT.Rpb9T0zBuC73Y3LHx4QS1oGJcarz8v7Wewk.WXvYgUr68rZSmFUDWEeovcchN2mAByW.2g013BTZIK18GCOwHD8Wnx7lKYCS3SvrpGhJwuzoII3Ez2HDoAVfCvzSxPB03ir78AppkPU9rLnUk0wV5uHar7KkVAMtBHtDWer.cvqri57PU5Z_TqPeONvZj_XMvnNiN_66orU6vna2_uQIt8H0HKu7pH3HO3sj22IeoYWiWexvnuFky8JO3C1NG2IqeVFo3ImwnvDOuIgYiFnADFAgois07OfAeBIaTanoFCu2sG_dk3dq7eXVXrVWvXw21FWgG8N_Y_8Atys.VfMMf8AEEwMtQR0dyHGtUwgnRR78GGOYw0Jtq8aScv2Kb_Kmgqbg8J2iEg8fSnSpsn5eWx2qq32R1kZJkuxi_OBJ.0R_cj_9Ob8Sh2a6vIfwILWTSef_0OijY",mdrd: "6yzGFYQDstDBoMsixPapWsq8S2N_WJIBLFRK75Pg5iA-1739786936-1.2.1.1-FJZyyVIYEOz3Z46pY6EDO0bxkiUavz7cV3M3MxNDhO5JBl7n4ftuBV_Ds6PtcrfwhAIjqBHHU05cXsadAtXwajcaBV9CELVt7ji05kiDS5PA80oVkxx2H2BS764eMaz_SqF0Fn0UwTQqoJb239tzGNx3XkPw3PG5u.Gx3NHFNut4lBSMcUxm2vcRZECzL2M4IrPxzClKIlgxgWKXs4z7NoD3R9Pcl6H_qHsffqbA9xbHY2CNKHk_MFKoX1neuTKXtCqruWBOTZCgm1R7q4FeaqLEpcSMROQtYdw268lC4p8.0eViCuHlKUGbELC2z02BXvI6rvIwpJYDDBX05ojyf48E6eQlrOYPgkXNzo2yH_Eh15Jx2zJY.0qHfyJIjlNRRpprIQ2h2.FKseqrGZf_0CEFLHjBt0FvDajGGRjGUTFis0p7bo3ZXnLz6ZJKj6FBDKzLbx.blGV7qlqlBN7MzPawf9subaB457bI7p6Js07dsHQN9iFeDpp62fCpUniCgQguACPva5QTda_nqOIoR.e6RPBCvY7dzQfdvmpVwX7h8cT6AfYzbMx_Lu2mhk8uWESXoeBS._hCHet6TYRsmfiW_zmeKUc9wOz.Y5XXGTXYmKXG00HZUPFbAQqiCKhMgKNCutwApSG181iAcNFuILh1NxbiVqrXxNrlypcZArPyZw.oxBxkFPjO6T0mKicd_7gdODMl0YUyRW5emKUzyiRFWdawgu4j7pmsRy.PftKi2nP0DLqaeQHPkAttYeyyGFJV_OSedD9aHHeaHDSB9WCyzTFvH13J03F.LB6LuVuNwXEq3RUPdziF9Wrf1P6Kgt2L4LbjTcEetTmPuAui7e8y3s9zVbRiLAf.p.hPE7QpR_3f1r1VDF43HACUSvaWAEFltreBjRUQePDW0b6pmNpq8L9CP3.K1cUTcpZVB_XABQXadP8x8SOkn2g4m.WXbwjaKTP6zaVrAAFwc1uonrsAYC.g9NTJcM3aXkIzSaM0YqfnPcOlXi0mvEqSTXDHVSo8A3hPrFtQBj_lG1YqjpjKpxzjfhh4ksc1yDJdQUMFNPl2ccl3DApUVh8hU1GyTI7oldrKYQ8DqeTn1_Svez2nOinnhjTtt7R1ADC6DQLxxiI8GwZW3bzgpROVgfyRvTnpnk2mkU0gaikXojsLf3OoCtuTbtgv0BYxf0uZZr450o0BIdAgN4pAzqz.trvtxx8fGwk4kiFPPT2iRHXOkSqAofSKjIHA6Q1VQ2DHP4yMdIV3VUN74.5rJU0j8AglaGkB8p_epjpPu_A4Acrdd24O86lG7DRtURHT17QQyiTF9IF4fLmfW8.XHCBdAkPvfrK.uD1awsGLCZvbq4iGmMKNbuc3W8hkapk8CWYG.tPBC.1XVRSo5vSYk2i3CMoZrAlwNs4HMV70BZPXRt0WCEo5ujV4P9o9GYHR..pDWc3Pth0GhTV7IpJ.XPIP7RhPNX2SRptoRN1N25a4fas7lsRK9VeK6bbXN2B8y4UJ0B.0p9.ZLjcFiHdEUgopK07pAnhnF7_hFxpSoZYTmq84IgzV.uewUGK7NwObi5IDmEjJd_4OA.QZk5a46liMjj7NEPkYfXRtRg_MH6sI42aWHDAAldUyK.1g.b0YVYkmH_CJI0TYYLXH5OasXrh5BqY6DlbzySge7LC_A9QEUnIIGzSSdx4NME3IS0iO13o8SlAx8nh5NVgyklq.wz1m2N2KQ3WGf9oPU7Q16JirjrOifdWSP6k8hV4R6BQQJ0bLlGplE_I4kH0ulx9HiRc4d3B_XewO7.Cqv2WH3w7T0D9u1vS0yXlKbNXwUkPY6JKc6cxx_CA_MnRGjpWmlvsZgG3BRl_2GZJ.6Mpt5bVHYbPtEbkaJQQ9Y0aoI1S2bU2HzpYlOdlRG5DVIx5rEccc6IXCXHs26rh5WdJbPcvevsPsR4_cAMfUdoicFo_8bIuhvEftW7wXIGNvSxzGVQB9VtYfkKMe20h3abjwI09yRVT29g"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9134fa9f2e64f938';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, "\/10007625\/mla?__cf_chl_rt_tk=BGZjO4ta6e3cOZjy74mERknZ5kZV0RfROPJbGmrqZ4c-1739786936-1.0.1.1-JYWYTeMXhbBpyG4n2lnmjch.QFa4J3qt2ltBUnCV1pI" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>