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="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: '9135daff2ab7fdb0',cH: 'lZrsP8hcP073wfxb7uHNyO6wzj3SmRc9X4qBjNmUAYg-1739796126-1.2.1.1-fZgS1qpX0Uj5VZ87EG8bGSMwZFXTn_P1kG.J2J6aIiXJmTpd9Vd_sZWAP9iIEAqU',cUPMDTk: "\/1775.pdf?__cf_chl_tk=pAMTwMjZmYwp..umn2opriAulBV_hfLD4DHybZe9whs-1739796126-1.0.1.1-iqYcUkERRRRwE8QC70ml7bhzWESn2jWEiJR8LpgjrvM",cFPWv: 'b',cITimeS: '1739796126',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/1775.pdf?__cf_chl_f_tk=pAMTwMjZmYwp..umn2opriAulBV_hfLD4DHybZe9whs-1739796126-1.0.1.1-iqYcUkERRRRwE8QC70ml7bhzWESn2jWEiJR8LpgjrvM",md: "kY1of4qDw4SbKeOLPi9aMhLl3hEQz6UEigwzbkFWhak-1739796126-1.2.1.1-mJ1pfBEje2C9eIEfHab_e7YFVfAzkK3qGcjVeIpBVGOWi74BceNRvLIG.x6iZmy3pQaFo6E6exTiL6Pea5ny0W97O_l0n1Lx2blatFG33oNdFREc4CnEzu2CmI5HbGxz2seDlqVl755TXTbiZCL8Iqh1gUKTdsdXEHMHBgnHT_YGe6__1uqtHbP_tHE9RCf_nzw2cRinDWKvuP3Q1nY8eJ5JATMgwvNGStAre8jUfpP.XpDFJ4U8HDlBbh7tjm31RBmxlzn_JnK0TW2H70JO9JgUOBtYnAzkah4oh4cBRPFXxUAJcyZ.GwVi96nhWQ7r88g9iId9u1FjJOhdIG48G3KWBtBQ1lkew0NaN1X_3F7uaGB6DZt3ROmYzLCs21VMeuYJ4eNIhBGX0rkh8bCJ6nCjpcjRRen8kR0bOICUpflwl3DYTnRtX0fP.iUJ1Mv0ORa5GIJ3mA4ZeQHYfaiBGM.nxFJQ3RodYzBPaRDC07ppdkEt44XANg3nn7W4Klu.T20WeXnYvlUWjLkZ0jkpsvpaXJdI2BYw1vfXPkcU4worcVxB1Z.MGgXyZr2QQqDQnyAVO7aFvUjmH_MSdIgah.lEjCQVtQsg.ProCj2LbKixkQX_nebAaNtcHNVokTJMNFGMHussGLF9dd0FGTTGCDFeOV8tRX0nOYHrfUTSMe61AF4AQo9v.F3ZN38sxeM.nMdOBYPIRKwi54k8rKjNuAwNZGnXyQw5eWXO0h74OkAmOgNnvh0BmRRfi3IHPZ2LTWt.yGRMQHbHxQhGED5BfSgZuz80pq1ufbobOuVLZCo8mkfQSalKt.49gsej9xH_sNIhGc6g8aWaGRuDxL0ZWar3nLrWPZ3uX8o9dO14RfDnMxvuTbFA7pb5qM2h9U4yi8hi9stQHMbf5hhZY0T.WTYZgc.3F1fpQagTz.wBnyk5sIiqKthHdvAVpYiHD16ZGGWAhWKJqRrmvJE2Wu5Cp5gAuU7JUbINDg8cYq5.TE1YaHk56xN26FSgk6FhSTG3644KYHojDuWfIZ3uZcIUIw_xhV3khRd98wQtMud2gKMH_IDzRNr1GWb2FcRuQiK.bK7gWPr.Eouk43jjMZ73bjjatu1uSMD8OpzqJO82202feRebzBHFh5GN8bOD.3T2Ns5bFqZrw6jqI4h9lhHI14bygt6pcDu0DQKlG70i6l42QSUD464WwWu2VMYL6c2NhWXZher2teHe7D4PRVt.663DeCL.hs5NhZciiNYB61yf5xtslTj.J2YudhGskbQ6iUfbzcaN2kALaiu3HhWDdk.sJs6ys9RKkerfnJJf.eVlCftAtGOrCYIBvJe7Tf9Q8IHR6chFhAtI5gv6uEWtDnAgCxgWaWnYlo_v7RJnpfnPuuosP4qRSFxG54v.6utte3pe2.vcSUibVJKE2V03iP5hthAJpCU5fCdnLgS6K1kCKh7DjNYv1AVBlTW..MTjoS2kgucnRbpsC4KHXuJiMRhlxs9ZUHu.9SJW0ZXB2LnHSkKM5vUFb9m3iVa.cbjY28nDgjXCsLI4ATbv5tfyqU.61ncdwp98ObxQHXDM4uPD5.Nw.9cLg.186ANcZWooaHqagdIyxzLcSbvVJe016FlC3TIi5hhZ0Vjli0mpaDH0LhoCLhAZUZ8oIhsUEaX0tvlPzaREDktddL82hfK6XtGYWIrb.j703GzWZg6GggwwOh9m6NRjeAa86ZDTko_kHKnzo90jaeoosQIAIf6K8fVnKNPF5zFl1euGKRcE403iBpCn56GZR93mHbksIp76lNtJXMyKBq2._dF58ImCP9cOyGLYsutk_NbdzSgpojLAsJe1GnlH1G_OmXslK19emUEfR9TkQOFv7NHJDCOm8Q",mdrd: "KhwvCqyG_4uYvZuzOhk0.1W4kZIXQhVwA_iWernXGbA-1739796126-1.2.1.1-2xC4xhGvZkFhuYfpAB4i10wKvouclEFD8GH.4qtsK7uBzHToVYLXTR9UmtmqMQmha.R.rbotlNy_PqTFKRUI3xij5ae.Ynttp2v6uV1lAsCDTvQXUtge3gnusjbIG8.0DZ0l_b7FFnurAHwRYOBHBIIHpAPaqvUWocj2quXbW1PIUtNAKO1rTh6W64rbg4armSewyAvaPHl_Otlx.qAowblpG9angrJzL4t6Y4ytwwrvndnU8WtY31DW6FOnfiEBCoH2nYDbvOWgQa_2hNuJjMnb3NrQ1Z0Hxjo621mNLvPXS_RTavJMIRCNhLBJX2gGbXb1VECEMnZJvuwY6M2.eybschzE6sPjlnUULjiqbIvDUx9OsziXgoyLMSKUNllrix_h09n_K6vZJYp8DfpsYdQjKwFv0of47Tx0t6NnGm3PUFpZ_UF76GQQ5JBkxliUXQehIo0fQp18zTa4sliyp20c2rF_rccDbYE_T5otgCEzx7ygsEEVHl.TktPhibTR8qI0Us687H3ZqXDgk8ba5N_Y.vKeYgo7HExf63aLXwngXAyiOtdp0f2lRSxXqWBVsNerzbrLC9NVid0Zlg1YREr_zspXq29aZeSvTjlgNcdxt.qw859cVU1yTCGM.fSAGvYg_1l.7sjkVbYXEgKjOeNNJYJ2GhMfpCI2cEIuHzUK4ep9mweBnp7RZla5EgmE_FNUSe0NwWUCaDi9PxMSIUlFR7ezGp4.olN9gou6Ki6FcCE6uY6TKDF84mGEIYnjIPMRX59BRZCUMLqcammhuC4ybPggnGxbZumyxNKQialyAi12jkCHbfAJQFYMdAbNbgP6CDbGnsMzyqOeoeykXZRnDHHi5WDl6Kcgd_glOIhfzI6xEvOxfj29Yy9ZwsYbikLIBPom4xJ4g6aMxQaccQ12j0tb1FyqoAiXv4Sf1BmSZ_cdJ5lyV8feyUdPdIy8AngSn.kaDOe55hY5IQG_GvZxnN39QUrk9T4vf6LjrXx02kVUuZTYoHmfVBPJQ_dCs_bbTD5iTfm5f7jX_9WIkgqR.ZjUHhUykMIx1uJmXAs7yh3bORNV8Qqb2MRlLSOxfNWAxPtX3LiY8NawBVQZ4r.QEbUQ8k.aS7eNHZZtHd.JPaW_vyuAG5BP1wsXZzYMIYsfYp.25dKqanLy2AVDP_rVeJGRpXAIoNxz7R.ZIbFUq9I7d_g1Dn0oSg5.LZZ24GrQypzvSjkbkYldCSgOsNSHg4zrM07JBoiTkTtrzzrO3n7OhIffXCV6YkSyOOHY4zwjpoc.SSgnZ3rqplnnsyDfNUyej16Zbdem6aPaIk6ZpDTf.cdZwdImEwPXVPoFvTdzb7Jp5jbSjcqS8pAgkA5g9EN5.DlFMCclXcQOHH1O8Xl37Jxe.0LEmI_unVv7G2ROnHSKCke94j.uLPU2am1LaHAoM0G3moVBuwSWh1aXXL..b_t6sz4nBn6kH8lfrGf_AegSWCMhOAS0ls1QOlP.LR9Tb6XP.TpEQQs._saE.P5pRxduJS0gSPe.T0kFStrodfs7Awc3E0HNHWgZ6w3CWxyfdUJG7ItJQ7G30YGVAcyuBaXI9T8WeMSB03lSvmyQMKQDCLc6YdBcG2Ylx1MdvHy9SUA_t2aZCoV15FSC9kLrpqkOgd5Kyw2ObCEQ_2FuZ6W8m4mkF3qDLqp24K1v7C371Q_P0BSIFmNqkiddS48dHssoH1IeYPPGeQ2QXuufGS6Slx1pgv7ref9.5pVwZWrx8PdDn_blSVoIwfLnT1akeeuVoj_HntVmHtEcUW6dJrBlOZLajTH0Nhk_3e9k4FQS7J5k2gX61XXV1..zr4adaXd2RiWSwnXomcWx8ofm8ln_EVgVGc0Qr_MPh4EMzqEuX_ejh6A1D4rznjT1Jh3Yshfd3pFlEfm7PLh3lUk_4OWxZfwcNw4AvYB.Zlfw_UumJOwQN.T_K_pXyqLt3HyoFMAVInPCOMPhi6lQf_ejZyESSo9iw_k0jhJy6g"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9135daff2ab7fdb0';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, "\/1775.pdf?__cf_chl_rt_tk=pAMTwMjZmYwp..umn2opriAulBV_hfLD4DHybZe9whs-1739796126-1.0.1.1-iqYcUkERRRRwE8QC70ml7bhzWESn2jWEiJR8LpgjrvM" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>