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: '91337eb0cd325e3c',cH: '43S0z26_LmX6WwizGLRiI9tt.UHPWFxBqYYsVbSYvao-1739771374-1.2.1.1-HWgYwD9qaFXD56EH48X3Og22J2rzACrqWfwiyGvvZX9hGSHZ94Fb2o5TjktyMnYn',cUPMDTk: "\/14915\/bibtex?__cf_chl_tk=FCJYp_W13gwnBWZ70ZtSVS8Sbg8B0kCQTna2dn7CT4M-1739771374-1.0.1.1-1aT_LFHvo0N5.Oc3gfZ3y7eJQxTwHz1w3CYK5wnPi6Q",cFPWv: 'b',cITimeS: '1739771374',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/14915\/bibtex?__cf_chl_f_tk=FCJYp_W13gwnBWZ70ZtSVS8Sbg8B0kCQTna2dn7CT4M-1739771374-1.0.1.1-1aT_LFHvo0N5.Oc3gfZ3y7eJQxTwHz1w3CYK5wnPi6Q",md: "ooLTxUQw9W4tCXK_GenWCvuCDrDwdBRxgsXfLPZaJwI-1739771374-1.2.1.1-nO8ia8UpFkuCPuErVeenPiOmRd.aXODrK73p3un4GRjOhi5RJ61x7SZOb8n0bb4GLKG_pk5hj8BBBNcPFNeYe1hwzkrzgEjI0UcjDFfRrmnCzPl3H_HAxbwG4ylrzpWqzS_2D9J_4.4F5uZ8CdTBkoNXqUtqNVgWHvJXQ27AQGZSlq0EYL8.wIxwluB0sXfrQ2bT30J9i35i5K8A9a1uIDe0_Tzg2BLMv.usPd0d8F0sAJgiplII6qCDxOh1Z1XaQYJn32fzgKCYBycZyJ6criwPPBuvZQTlAToemd1Zft2nY2IzyV5AxdMOuK4c3Ny3MutyBAWy1eLnkwmrX8H5ozrSXX8NhTyNWUeQuQ8v7sx2GtFv7sD5fskvXA4TO3sac3kKK9Jwrg7aijR7DTjSfKY6CypKtdgL.a3LWebfgHcFzyUhOB6v6KDI0f2BKnQMoSs2F.9W2dI2eWWALIVfIzhGzcrnMXBrH5Q3c3TtaEBgZRPRJZ5TwM.UEslGVhClsGE4junuxe65oBVlTKzbsXWI.Z5J.PK3yxFvh_EgjdSHAwm.OrSqw1gybOCDX1qKwpcStr0INRVu4yJRZlMhBBuEOc.cN.mBkqYXKQZddmKvjOeK3P2ujpEuGYy3vtIRwvIQH5AoW6.CjH3Fb5x3nyMb__fgU_1RHjIGMyuh4Lr0wYwCpFLqlUngL9c8TQ6BAvERC7BEhZ.kWSbb76ClCfFiIXFxI_FiE4_GlylXEGA6z4kxT9UGV4jcv2lnLE4b2YhlvMa5WJ4sZINz1hRqoVpHC_qK7Pd69CpuYXFYrKfOtpdw_3C.V3Ye_81qiajDsrsHsGffzyhDlithOtUksE1VqXQsyQHA24QLpsU2I7uOT1b7Gmnfef55kt0sVjBZW4Pv7fa8wx0TChE1FDOukPwV6qYjMZaHf1ck48jOHRtHYr2kTLSoV5vQVymzPZbc3.ALMc8KZtHV7d_r5MydDD7K_1Wke2kv42Ygc.fXv341M30fL8QUGYgk_KxMG4j4ZQWJ_SDOYz.ye6xXheI473Jbt7GitbnPK3MLahQlFI8tiuGjHO3zgZU0P7Jx9Fu6A47gvCf.A1fgVqjQewkqte1HZ7KTvl79UIs54CItQtrHouM0T48_q0xp4tEI.lUvQwJv8Ro9CddKGtA3mrpxOoy2Mlxh8tGhVkHWw7cNGRLHXFNbm5k_UfQMi2eVr74sgcojoSsv9VGSuDKems63K1ZGGCfCmsuET.l2ZSpDn43egbhbhLJGn5T6M1NLp_jPKmde2_cmND3.WuqZkhyQA5QYCtuVn1tp9z1dywsG._viQn.dPMkOAgOOfl68UgjSRnUGLlx66SPDRSKQJqzykJvW.fpeGCOerJzPKmoUwPjZiqZEgEathKPF.3gz7cmZd58yuIjB5nc0mS1MuggC9156y9jcu_aFHhHpgzzilDtP2Gy4j90F.mFnOPz6wQ61sOvjs4uSG82UF.1WcWkaMN0hGOqt1m3FgL9vSo7rormx35noC3RWv_gmphpf0ZjW9cOvlpi6NABoZfLE0Shsxq2c77dDN.x8dO2ucFBov4Fv1tSemWzYP8IaQaXeOng5pPfJtt2nC.A7Mn5qBjbO4NH7w72vDgnEik66R.gzt0n03NL59J1mYGYjHhotypKov9QJNG6lfCwMhmXNOoxAganh79aRYRgBKTwzpoUytHdi95_H2hzSx4ycxB.gkXmliKElpDMXApkhxGDwvCz3fLcGQIX8Cfe6ss87PQNtI2g.b53hy0MQFXpwQCUO1yXjWApk6pETkaHxZkYQmWRLz_n4Gfy5pN1w7Dzn3J_8Yvj2O57p7p29QEJFR_kowifZ.9HzozOYRz0HHWwkxXSSerflgZyty_t17mc0qJ00dv0",mdrd: "pwbKYA_sSMIxaQRMxljBhc0Ds6THTjGcPbQG.Ndcpi0-1739771374-1.2.1.1-MIH9qoF_6h..9k3M.j05Pn3pB4lZQgQXlyvoGOyQDSrjcAHXgu1_ODsTHjYk1G2R7x_m.ad1uLGfolT.JhCA2vDASHauE6YDm6P2m5T8FU5w9Rw6t_becYRrfkgRT23pFSxa9ycpPV7Wtsz78ry4ha9bg1lurZRB07ArhrLbCiPyUfkMFyzuMQHw70cS7GTRPfTSUINOI4CMDxD2n1w7.nyhTyFZvnFrCChX0qouN_9ri_8D0kke3HPzhcr_RSgB1dVEba.qD3GK7ZeTFU_aLsU751QKze9a58e7HHWBps4q65cmIKDRE4DXR0zlIr5USfXTFVrMJuKwP5LT.ftESrJouK.T59edNe8YW_AjDbuLJXDQAUHnCi_qm_QLAigdjBqRM0t7lK8J5zqWwBefKRcxVOWpq66hEtYScQ.nBX8RQvyXhCZVDRaRLeLQ.gz3X.S1yyy5JKXHErxgS8lqJARbBG.UMeGzIlEaBl.d6T6eE2lYykzRUvVrV_9NjUWDNJWfcgzvwv0zXTV9UGVos23JWkv2KZkf5EQY0qyzkaSNihLRTXw1XMCj2bRV6n9CICiVStkBMXsaOwQ29TdpfaA_4mmrrdN9x6Ql7AlIq_.WrFyCb3E1XSs1MsyZLJlomifOaStxJlHZKPP4lZbfL6dILkCwjRXPIcQcft4fYgKlMi_sUWyq0SHSyZ6vOiVQjxSJTKVM_klZYyWN8Tgrjy7tlRmkBtxz9sdgtGRZ88ejH40PGcggSBUxHBQ8FR06Tfsvks_PZFZi0o4XQalbjz1qaSzZMmqG5mGlOU.22E3yEy3wmHJRNuycqKouE4rMHHuCyKac9cDD2amJvPqdHzF6L9iuqHHDn5HT.b2iN8gJuX3dVWwK8ngnIm82LuthWtdiRBbWMZfQ1BzIL6y9xyKn1u.f_0BMv5YMPBRgy57IjaSVG2iHC1ALCoJp7ollia2I66o1FlYa2coOQY4kmWMhLo.TMlchekFs95bB3ibDFJZGS0vy3KdAIHyZ7UzYCUJ3BB6.6tpHq6oPpXqZ9eQQgWFPacJKXxu.gg6d0ozCmOrQ8lkxiK5PHAZewQo3qVv9Vt6hijB6huVr3dGxNomHPvesMaIrHp1kALT6ffqj2m1FNX7783OiR_uhSWbsFF7O72ybHo..aBXzDhzDtMSYZSj_npz.omMB47QB9c9SQ1ZOyfN7zXVM8FhkXWiVp1B1LJS..omR1nc3c8NgpqxcGMyZx8oxhX3cSX02E5FGrc_nPc.cC_YHwiCflCSBXuY3a9DfqiacerrpcbuzUOiYWCLRVTdV9JZmZ_GA3cmbnI4IhGLH4pqcNf_sFkcwJZlJucKb_tetARfW5aS2cKA2gR1u1BONYmDcL5.9c0YBRrZ4DTprnDlCzCTXjJZmhL9Cy07h_ldU4Fw3Wf8U.rYOEKcwKdtVqdfKLiHpATVUOCqTXqyvLWfbljR9T3k0aOvsk2QozsPOs02scM2XN61nNKVYTP8Yiyrvdu8rOtA7vSFdNiyJYa20e7d_WZDchcGEmRJZTvnbxULm.PTzCtAZToZbKOPQOsRb1pBNhwm4XDqdP0v2Tjif40JbcBGq3P5IOci4ZpGKSp5Cvi21PxfA8aJbchXc1Z.wEgWfipCSaMQ_Qt.fTLirla5H_xNVI2PFNWzSu.eUnUgQ9wNBC4FkroVctb7mmSNuYE5DHD7DI.wkcy6a6zV_5Yo.gO1osdyLAe9nXK9SuI43_3AJu0Pg1geKNlvM6UMkR1aE70x1eAay_wEfwN3F1Cqlo7wtDhUX.298K9dW4nCJ3iQKn5PovFWBLkpK7qVQympWklmpj2E4dR4DGA23Z1IoWGclCZQNSY5lDItgv.IDauDb0yZeKv2JiFEwVZqKdb8DEU6xTJtWudf8kaDiVKvSYWPVTyqQ_FeohAVJ0JPVr9oW7ouL.01hNSDJH0KymYuxi75U0Zp7QXI2ebY_jT9hvAp_"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91337eb0cd325e3c';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, "\/14915\/bibtex?__cf_chl_rt_tk=FCJYp_W13gwnBWZ70ZtSVS8Sbg8B0kCQTna2dn7CT4M-1739771374-1.0.1.1-1aT_LFHvo0N5.Oc3gfZ3y7eJQxTwHz1w3CYK5wnPi6Q" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>