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: '9134aeca484efe01',cH: '4I6cqV.l2Ujmejq.Mu06kZSGVJLKPBgclYfaiTHN.BA-1739783830-1.2.1.1-RX8JMnu97K4PgnCbDesFAkWQikncsAOJyQxmpoZ1aaLtGAfa3nfeqpyua.qFEB1d',cUPMDTk: "\/5260\/bibtex?__cf_chl_tk=8OHFAd4fF.94hcr5o7jpAu6iIng2_kliH1ZmRvd3lzA-1739783830-1.0.1.1-OD4DHbSw6h73yHK83WvZEONawY9O40H9M6d7NidAsjM",cFPWv: 'b',cITimeS: '1739783830',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/5260\/bibtex?__cf_chl_f_tk=8OHFAd4fF.94hcr5o7jpAu6iIng2_kliH1ZmRvd3lzA-1739783830-1.0.1.1-OD4DHbSw6h73yHK83WvZEONawY9O40H9M6d7NidAsjM",md: "3MB71sr_hUHjIwZtRYUksZ0xAzk4rVxohZapvdVhfd0-1739783830-1.2.1.1-KWv32hDtQ_0NOQDtsukIU0n7eKdSTMlCy.qYtoBlhchzOR5X5cOE6YwUGRUz.qAfUR5yvMJoWKdTDinlau9Dzfk_HHHu6k22xSq.rQuubeTVus7fIDAPkMBxbwY5iGrpMNDNjo8xpW83PAVb3AEG0ft_9LVd.K1aB3ZK4_r7wtAF52BRHK.PMHGQW0h8pgXeXeK0S_xAYApF3AH1XWkKfRKTxBL94iwz5medUeOL5q2pnS2dct6T4YadCl8qR2HPx5WRfqOKKyTIY5eaG.0uOQXuBQ8l9.Y_h02icKGzfAnv_.MSIIdhiVAbQhS6lAuJ7iLTw4.lHLto9ND.qkxxbh9mUjnCnPkuxbKnm2RXNrQaeviBCxRC0TnklPgYXXNrUXVYcdBUZSn.TsGbwN7O7kldNVOg.OHauNy7mWLMu9uHZ_uKXiczmqNmiLkjE2cOnrNH_AmEP5DgX9AOAxAIBHnWiTv2SCKfxGq8uWivrXVUVMVv8jST8yj8rxQaAKMeViPOFUHfVAdQ8r_x9W_4p2_LpvwH9biFlP..AxIGO09XBAIusNlTNiS90yLMrDJNsJs_31fWkcs4.UKvqfr60kDDNmS.eErR4RCsrFXk5C7eFyoQpiUntkYVPSVAmdFDrZNpCEvTeZ1yZTDQZYwB8C5y2iwjJjcRzzO0OeUIdSgnlMoVNBrBVJpb0E0GAHu5jT19wuP2NF9JdynNwVNzuyvf4frAkQQnTgKclk8N_XEpZycLpTK5ys8lfgLA7jSRuARY7tc0DaEb.9fmsqCaUfltBglukuCYakVZ4twGzwmxsyxKcA.xx6As1utPNaRL_jM4jGez6zBvRzjWkxOmj39UB7cEkuU0cquHpXC0ufYVHSKA_ltmcoY48xFYQKVBq8u.cUMqEs_aYa26ZxE1dDfx9He343cam7vomTg7yi5jBah5IhKrUsHsfcE5T_zWh7rcrtk4aS.BcrIQ.fcYpHe4SjiMuN5jHGzznVvZO32yZVy1TFw5dJIbaWUaaRz6SgMekgUM7kb.BOlginm.I.37g7A3IKy4VCBoIzaXJDmipG_I9y08GyimwtxmcdYjury.11PnunfqVlMcHWlfZ1MN2FzWk8TTZil5Z_stbzIIHKFBBUqYj4Qo858cxmeoeluuVjKRqzw4vrDyoLBipKtnWDxMNss6VrlWo4O3n3FLwidbEh.6N9e6iVIOyi2zutUtUDhOlFLe_2NrDcY1YY.QZ2uHnO2MB7sYgAA01AB7JxIP51TnDF9YGK5nXp56Va_JkJfzp9_rTvkNTdJD9WjMnhfU9qAg2wugcLZMp.M67mwvOSaM8oJ19GtvWQoR5m6ZwE01qZIP1CKYs2dnE2CAv8M8edQlf5yTxAvTrrnwvmqtEMmWqeRKx6Ml35aplGQyOGcxh9x.5CFKdqjFWv_eZgS51qqE0WNNGcFRhwPEmch1lb3AYFAZCPQLKSERkfmYFcFEFkF_fU6IyGbVze_NfatcrmcGWAfiYpTdgvSyL496yva0twDGI_8K3rgC_n4eW8NmxXRSZtEWoWSKRbTWkQwuV4JFv1q4wSsZ7VUAxdnrGqhsZ78A8VjsPYhp0L7UgHnbrpAckCI9csgN9TglVOkNzPY5M9P8tjZxq1v5CKREnGJf.6kXAPhtwglW3vaEbCV7v2xShCLZoX2MvO1p8tXauQp39YGlRbMpU_RuX6vpNBb6hTjyA1P80ZIHYhNZMiV5gW5TxbuUazPalX8nl5oiNuovAss2P6LfdEFDBgbn.rsm4SkZ83SN0Wc9olor1sGR0jhg32CtnqZL1EMkLUd9e4.X0wIUkP_NSuDra4qiN1ORdVXZM65kHWtTXeh_HlHDXUodt5nDR8q4._MFQ_Gm9hLQrHNVu1wD5kU",mdrd: "ioUlE7O3ZWYUim7jmIdXaeI47qeii9oAUIHS8jj.qf4-1739783830-1.2.1.1-hIqK2wFxoqJiyJ2XSq5VIbs9vI93YBX397e9GH0Tl49ceuwDzDnV74djLosolVadEvteaWvDTTPJ_1tHtmKYKT2Jo4NoJ3ixdtm.S4i1DNqBa.OHV7caPTDX4HP2ki_ne38nunudeiG_nGASZw9LvWCP7qlWSX1VuyP62M_ujxHFHbisJ5w54yQE8obn2HDo_R_O0YqOj8sspCS7673xPUQdXx9knw_9gWGnu9l_VJhNiarUO2wwopSsGXxu4A7eMtlQ_hRGLvxAeXG7xKlCQPWzfLaMzeKYZ_0lXC89dP2eC9de8Pz_S0yPVHCxW6Fo0QoO_dvTjmK1ckL37HHFNAjqBAciVErTOcBDNKjChZkwSfP.tf.6edI4viClpzyHba3ii2H7_kgUCA.FA_CpwnkwYDcE1hznjjQKEEpsWpNACg.tI5.WhgBlPghbO9vffZkWgOmXZ3_2V3_uwWMGMDmvrkV3XZxkyEkq7pHiOTMQzAuj8R6DfH5bHnFoJXBjBj0tsKX7EtTC8tjh4VDxnolis0LjyE7VHiK1DmnWLn.V0zcgG2FxfwQ17jyZpMDKat1p7p4k2LVqjGUv2kVMctTYjaDkKpTqy2Xik5B2rPLtNn7afK0rjn86NtVA9KGswVHbZa_FUbaTFKdvnqXhlA_8Ju1iWTkw71oMBp1Q6EpY2VeKuA8B1HTwH.EcdXNrNeMmx_1FInziK9gEZYEpS5S_1xOjBSn5qfY7yi56TVJYA1T03QgERctFZn_8e2_vCDV1uicsNcuAQaHfTwYuecAFB8BsbnI0ICelbIRJURcwYUpFaOE45FZ0UvkChPffb4ddIziVs5OPDa36R6AjaSndVLbG1RiHTMVcmmsCUd.0CYAOsBfqrt1YhJ.h6MGHONGtt8QPrwJCe4v9xl4EJJeyAp53fUXINlmcRAYHWAuouau0DckLYpdqEAs9tUjrdtBlRmeo3dxDlxIZ9po88eKq95aWogehJoflsOsDpHRRXAAv7k.LGA3U9MbqRB_Uo6PWWVercugb5RIsyzHb4tWxLgwS1DRU0ncRDFte5Tq.ZJkKgAZttSxSxhM2xqoo4Tq2mokpeZJs60XBp3awTKXD6OIv4J8mKvbhwnRbbhAH7G6dbgBxNGw5tu1LN4rafypHT31d8umS9zkRnzzyukvAes9FY4ugKnMeGUMKF0aaNepNrgeYeGzj5WGcBlCYQvr0hHQsyloGk4pvqSsUJ2z6Vjzn1H0rSbVDSOBnc.LTsPZm3M9NvW5T__sXaRAtdaf6wnkGi9QV9EGW2arOSLhkihW9VI3kwNFPcfqLl6QRWHZZqxRU6ysyZSqhPV7.otTnZ5JsVMvmxmNi68A9wqqxCxz74bzqIWLbmYbZ23PbSyxSCM_s.FngMvTUABenNvmNNg9TYtlYS8wdVf3rTJ01kexzXARADcpixpU9fLW1TAejRx3PyvpsPfSBHkN0.g7veVew6sNcJUA.IBwX4ZOBJW4xHFXbr1WpBaocbsS2kQ0CVEdRU6LtPS231Ff3qdHdQtURhVPbe8ZMLrTxkZi1hyGIfrKAckvhDqPYAnyjqzgFjVB4zoFCYigfOKa2SCD_MsfbY2PxYj.Ho2cnNtutYsGXa4wU8pKdudgSmJaJR7lcqcJSh3lbiQvsZ5nn4tpYFLEK277Yr0RYwYFaBXFMfXKLFbKljR_llwUAsfPQjFswpkUolgxKXCHfmxEdUII74krq4lyec_78sk2Np4DVn4HFICZVb_h7p7THv0lGGslJ1yzO6VZYovEekuoriwOSifyNnlGNpC0rQj0VT7DPtuzD3txchwVgxJLBnyUFHgianSGz_WZgHVz9PesXLoCH2bE6JFgkptLa7nxrtGIYwiE54ddTFo1TZUbECNWEWs4RkfVEgmwGhkbfWrk7wXYEf.lXrfAYhuxDiaiYjKq5rRDTcFo3V4FOXBoMzN.XTlLBwmi3a0s.qNtlUMWgj3OqQV6j4AevdigYz3uWsw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9134aeca484efe01';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, "\/5260\/bibtex?__cf_chl_rt_tk=8OHFAd4fF.94hcr5o7jpAu6iIng2_kliH1ZmRvd3lzA-1739783830-1.0.1.1-OD4DHbSw6h73yHK83WvZEONawY9O40H9M6d7NidAsjM" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>