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="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: '9284f22c4bad89ad',cH: 'p8o5tTyagH2rcQRrohuTXT39aSrcT_a66p.jBJ1zF5Y-1743309805-1.2.1.1-rQwrcjYcR6rrSmjXo6e9EBEcchmEebtBg8RUHdYc4aXnwbXf8qvXQdgjlpgFpQ9U',cUPMDTk: "\/14832\/mla?__cf_chl_tk=iWHhaiHL.io5xO7IwAdwNryq_iSrrKbKVQbHZXYc5G8-1743309805-1.0.1.1-gKAl.F_bDHBbqUEJ08DGcMm0_6tmHoi_Qn7s8Di3psg",cFPWv: 'b',cITimeS: '1743309805',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/14832\/mla?__cf_chl_f_tk=iWHhaiHL.io5xO7IwAdwNryq_iSrrKbKVQbHZXYc5G8-1743309805-1.0.1.1-gKAl.F_bDHBbqUEJ08DGcMm0_6tmHoi_Qn7s8Di3psg",md: "4F8MdWi9wsqVIiUVu2_BSr4hF8X7cD3qSyQe8Rc_am0-1743309805-1.2.1.1-dJjaTaF08Ycr1aUqgpAV7j1Xp3r1TrFc3xwlwpvfAQIXCvpj_h0c5WYFRmAdiEeWfpwuPNzsUo4gDJeDiBAN6XialzvubihA0P.plurGrnwyv8WXQAWVjSHX8TzWU.NiMWs8ebq6YpGgniRA6juPr39psotltmZmBUA6_8g61cUKWjDIRZ_tAN5tCqpp6CyEcntmIpmC3Kiu47kTv8pCBp6OwMq3rRKZyc0HSOXhJAvWr9ErIC7k5zL6qY1PwYGHaWphf0DoQWZeacEUufkaQEUmi5WZRNAPrPda0Cdry4d6DbPBThUo8ONzomgGwz3nM.THS8iOU76NNiHgRAfJbjE6eYx.QwRqHaPphW9syHkQaJ8RF4aFbRq8AvjQtzixZIWJhGzjLbbVTdOWc7umJPAH4qq7jOCjAAd3410SOGCdBoMsPvTOGytyHXsjMPDSGMbs483TBCSwMdFZDVPPfXwqkS6XxxCOaepBLpf6lsMxDViRTKHiY4X4x7F5fJa4EuXcGSON3c7hckp6yLIAR23MTgE1p6hs9lVy47lgMWn6OkHb853Xc3p2ZN_T2YyJN2PWjDHOeY7hMQ5qBPCfVQrgRykqp0_aAhxOlkfqTOOKWs8hX_hyLj6c49WTaprgkpusbdK4KUYN6WOMgwtCHIVKR.K5XrSouuqzuJPLtuaHCoobU34ev0d6w6aK2XbNqFWm3HNhjh0T.eTWOxW.gqnZBD58m7M1IS96cqj6aKfRQTzCJV1m8OHZ5RygHzrHZA2aH1R90VcNul4k.auWRKfM88LRJxCMUA5yWpPaWyuxCISPXAbGT2DINbhuXNcEp49TRz0cRobeoNyZ2T4GS6Xfl9tPMeBMIbBNRhwugw1hbLiDRFWfmJDrRwtfGSIyfgGlfFxSdwjww35S5dIXs_J3rCHmqGGa615yscIXitkFE5STF9V_2DRjynlBChbTwC6Fd89EBCFyfipVUjBlFIb4TlVN8WBiXvVJMaUeYW8L4ntfmBkRcQbgB1nw3BArDz8EkIifQihKQdWk6iwPAOpxVZNUt66d_3u5jnb7qgQymIco2FgTQraroYJDniWXptB1Z9Qf2Gkkr1U4FWAF00KqgW2VowIC1HWh_LZaErCQh7n.wc7GhI7Q8U76mmV8uAvGXNozWHNoLNUbeD.egQqyyvEntqt3IGfdxCsVLSuAVmM4mOadEw3Xgr_lRKFMgAHA6ZDijPjXi_ZCHUJdog",mdrd: "ExGbCdTSZhbm_Md7DN1kHoz3JERrdVmQ0nbvmb26CcI-1743309805-1.2.1.1-ZD0TB9MSzOgZn5CJ3jYul2o0JY99NNDu5ojQxKqjDHiI2.K0amRS_v66edpjoH4.SLRBnNrq7E0hV.8beKthw.oXyBqeLzzv.Sz2qC2UBr8yS.Bqytg1.ID6yfulHwrGtabV53j7hUQyiy6FHwaK0nW7bU6PUscjt0VE_808tG0JfO75avGqHk.5tJzy.OKoVkS_a5FGxRty2SXJuTxOC2i1KN.uchgyo5IJK27NfzQsorRPZ2rBBpGbCkBk9RQAlHzqqs8wjxCLAEQuww0TLeFvEq0RIJ5HsmtP3SKBxDP2K_KG1wrcpAx2QnBdsq7XQXGTZRj9kXIB8Ztyn0z1OyNZy9jDvcISEJmD6TzBsCPFeLY2dvYGak1LcsKbjygPrleUSDt5DQkw.u59GjTJ0KJZgqEBxpEV1HhM7wMrx3SGeHaHoVZfGbHoocYP7kIZgY4iAak86oQGoe8LcFokT6y6ud6UwZ_NZWDuU5vdXt0d1g2Ek7tZrR6MjVw81OWccSyGFhuq4m4msz8Noh.5QjMieKeBmv0dJziwLJ3JL2n8GICsKWkmNxSGowoqFCOFQ3smQ6UqZwH4AVa9yuqSOgWlKMSVDM_MF7ixjdK.LkLdjyZKpCBqOmZRbzeUPwp41Cugwfwu6jGZJJu.X4JmyFHVTP.omHCExrLrJPdGjHDRecamJ._MKAzNcU9QrI4A4DYhsDeFLWagxd2QSDr5XxYrkJwsPH22zdTIJeBffruOoOKV6xf4JeI7sex.O7KMtL22eZwAvhb4mVggDsaQfuZOYLcjPbpDWSh8SSGD1e3PLi4PO7ZxFossZBC.u8LhmenCNFDIgKhMaYC.BoadyS8iH6sCJGvdKY_P.5qUjyIQjbFphewkJB21gO2qmHYv9wCDyI0fa27sth_lOOfAhxYesYmKCMj2E0080ymQNjHKeocrQ1x5soT916RV35adSmoQGisrKjAzsLy8MNMUnmKh.daLpFSS1R6AAUfkQsjmn1_k94xAEqn0Yl9i7jOyvuP4_5PQpc572NO6k5sTJwCBFQNccVlqF8o.yufueV1dBPJ9axA9HFQoJjvHLB_K3g_.QI9avjRkc9bX50e.WTN8ET3O2rScH3vHzRWqaohj8.nj7ioIppfTP9x7RV1dtpMKY6ZaSEIeEpbSz1NewWkXkueOb1pfFJ6b8uymYh8cVZ5Wew0WXastEWi3R9kmm5QxWthv6c944DTzGxFgFrZ4FKszGNoEA.G4kydrTZsLlvzZLRSSZr_uzQguxyjT6qm7AdCmVFf98Xp0iDjs6tTGEH3ySGcNSALrZoHJnMg01KFeY_sDPhAsHX_PCJ84I_EZeYCfRSxLjDcblae4O7nq.257tHd2jvbqsevEDwT3iFH599R.HfEk_LTNC7pBrYJXZroRyslHKIx9J.Y84.4yorvbq1RJyRwuGFc12FzUIQWSTpgK8eFinebzSBAzSEXKa6CfcsAnPf_VE5RLuD1XP4JmadFuOP0Q865oFvQLUcnntkS8aDtYpxEWNq1sOpxfOiy3KP7q6g_O6gzgkUHY1X0eEIyCAjwONNRiR0d7TC37dmG0DrUjvX4O_hi2nfid.yyrtq7MCdyqDXmMvYzZwNuU1qFlCNVvf_xsvx6XmnnY8nhG7atPTizU6uHnbH.pe7CsanbhrWcV.1i5pZsGDG8eoMWYfjfHqmthgLr_FHaUUUBgosK7hA6CN92EkqzCQMmbAWEM7Hp9qPut1De.zn757ieF5boDRexYxtNnea9LNznja.cFSVV0Wbq75bRrip0aOHRRUlD.rF_012_IiQko.9oA3FzWJodEfuJ5dotuOy2OIy0rALNxE4MLebcvLwn4gwvNRv5oh4IUSLU50F1W_o9buHM0.snVqQOw6fJOc8ShrR8U9NITC72Stz.A3NNRMereZpAVqIbjZ2SG8iLp_bf0Nm41B7h7Fy_oAp27s.BhuwLNyqNS9VdAbYedOXPkHRRapzfFP3C__IkVKNvmfi2z_jKlzhuIC.x9QGLcbDbXaVogUi22Gs36pUyfG_4CAzdU0aaCX7qNK0E6nu969mTSnkKw.eMHV_A"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9284f22c4bad89ad';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, "\/14832\/mla?__cf_chl_rt_tk=iWHhaiHL.io5xO7IwAdwNryq_iSrrKbKVQbHZXYc5G8-1743309805-1.0.1.1-gKAl.F_bDHBbqUEJ08DGcMm0_6tmHoi_Qn7s8Di3psg" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>