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: '91358b7a9dd1fd83',cH: 'rrtJDsJzTKrDDPpg9JeuIWO6Vn63j1JP8JWtBhA3Klc-1739792869-1.2.1.1-1yu.HSR0VzkQmx61UfgF8e3P7qEvoR5ajrz1tc9GPSuMsnvHzsPxTthMtvaCQmDc',cUPMDTk: "\/10000504\/bibtex?__cf_chl_tk=yKboAyFSyEisNxMOG54UR5qWtouSGWfgdL_LyVGu.Ks-1739792869-1.0.1.1-MCISHGPHKivd49I_IU3WAaJ_YVQC7Ouy_73Nuh07.AA",cFPWv: 'b',cITimeS: '1739792869',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10000504\/bibtex?__cf_chl_f_tk=yKboAyFSyEisNxMOG54UR5qWtouSGWfgdL_LyVGu.Ks-1739792869-1.0.1.1-MCISHGPHKivd49I_IU3WAaJ_YVQC7Ouy_73Nuh07.AA",md: "Vo7HA2EGWQ7sjQygN3vK_dbnxkVPRxX7nZLxZUQaPpM-1739792869-1.2.1.1-1PCnBhNcrRx59En1H1tXrXxVXKxLYkZvXfvwAIr4I7LKe8txR5Co6Uyn59ZfH6UqL0Dm0rimKlevGLrHzPEN3WS8LxDzPb6FQ0_QVTJ_mMwvPpB1ml.CzcRd7DGXcE15Vh_63DuSshrGAOEjrKDKTP2rF68twkTUCWzp771OyDKltAnugu8RBZEeAS2wIRuh_twsqZJ6b1z3i8hS5VlLI1dIQCMptTyFVnuvEFsVrzhKfStPEXy631QKedROQpKErST9TB7IZaN0tn3bvY8Vhgg9FBZrsZ7FoHaM0eMC1wHLh_zqy4gDZEyxOXzFqUA4U1WVFsFq4ugX4P8WTUZS1.RXi.DlAY.InR91ak1SeaVblLkqrsATKRI_1rmbkjzJbK6FhEusFfiAT7rl7.ZwMRii2GU.Ad7H5gHORImHJ6iW50KmMFFueRpgl3QeVaNZXTxPcaz0di1BXnWBcwiHDEo1XKi_kus0vXsj1uM8nHuP9XXrEmIut9lJFLdCZDFz6gWh8vrmIpdTNV8hXvSNdg1jyi0okA3D0sCYJgWLBMeIUJA_M0Iz8ZhL.Nw5ARZgJY7Cnf0KOnoLuOUVw5UoH3Vs2gV0d69P6GaFGY81_mQE.unGT5w852HRqZwFOMJKPkib5KfkCuiECR4.B.4KflRkZ2LyqeMqLxRVrLqyLv7xI8DxjayvG8fvSCNBh6mRdGLpMXiXrXQjIRX7AtF.KcAFGJVRYFAGMXIEpBHcMmmN25X4KX1eAqstQRPoqUE4gHFD8oQGzRfnr8HIgUzNigUQHK60vcDT71CvmL2FMSwyWcCk90b_BUoPSHCaFHXPQcR2RDZUrwkOgLApB_DJ5C8kAZxiSP.RC5DIntlA2w7rtXC4JcT5.Yv0KvOzRFMUsdAwWbHiWDfm8PpHhzgdgIj2lJfKs70.eII_.IQWFgzrYDxXR0aSyMVoO9CtjaSubsWJ.kvPjUHWlalTOI9xfuO7KSe1qevcjD7OaDsn15gDVO5SCIx0sa9C8_7RS3orIGihmliM0Hz3cRhjBDBsAj0PARDoGW3yhH71rG5aTs.ja9jelksosO4Wz1kBIuW59RPQmX5gFhFklX6uu7ZtxGxvp8w4L_EQdGnyHddiESjd70Np9AFWNs9dJHP4Bu6MsQtyIszzJdpuzG5XagCbSRV7unRQyAoeWefNC9COHtDB1.pCbu6hu_GQ9.zsrvRJ85dCUzHZ.5OZwmtY35xz0ptKEVPSwakW5U0HzsRjQwlYJroNAOI5o0s7SOS6dG1b34lhpjRnIx9BDf4VNICvTfnT055w2UJ5fxDyBkDClb7J0PQ6rzJelHko0dnjrKXf7xcBtOn4FgBAtHbcPGPrWM5p71sLG89L_UTQzGlTkXvhEs52ITT5S3vDAuswZvWLhL7tE._vkAp7IPVPbHaYHSvhRLMQotgqXnJy_YpmhV0Gw9QP67kJIrbMYNfY.FYGKWu9gRjJhnFgXkfsZDNHuWG7xr1D5YsP51Xc900F8reviNB_PFtz_U5rHgwMtLcrzDUNBksOJdL9l95dtsaSg6Hq_PshOu9HMbt2GRO.7e.Ct5mbihAoz5Ojgoe2.dMjmm9gerFPebtSTJV.o0lJ14KZSt15jO8mid_467jmtIH3ywdLU33tAqHltXT5xQzbQYbkyx19O4aA59SLWk1zZxaHyiO0WBw8VL4fvDgz9XHOyDpKiQ5vEC66iksD6X6KctBoe._4DTivVz2LqgXBXxTq2IWJ9.eloWf39XB_ueNDQ6YPN_2_T2MmlSmwuVwLEq_LwV_CA5KcBuBsVB9IpouYrtuRVUjCbcUPI3KrKfkdpTdc0Qr6z7HdxnScdyNi5xhYypBiiuECKA67NS9kZaOM8N51Jq8b9824i_VJE7s",mdrd: "aqpA.cOG3UDn8LnQz7Dhxo4GJNA02edf41t5KsyyXeU-1739792869-1.2.1.1-L_naTFvYG2nYyb0tcIhCGLcxFRIhdGrrVMwbtNRlaAQSUew60IewSFX3iKGbh7qSYNsFsvGCBA3a.Ha6I9MLZ6i71D3F_kUltAey6CuZfsfygnhWKUZSxP7RUxBJSlcwPF.6LJwwOirLLh7rlB5m3xopX47bClC9YSdUtdRomMddp7QxXhU05TqZyDM_Qntq0yHLShFqh3Rsp7SeHgC.ozV8V4746ltsCHwRL7_f2M4oJZfihTdqfCBfWxZUshHinILxRBm2ogJQnhfLb1.NKYuJT5jMhYDc8TQhHVPAp6I9aJzIto_jvNr_SN4ZE8mkW8xtO3XAJjxSfuHtW9tFamJf3fkieqoE86Ix6Vl7iXCfrb4_rc1eaiRWnp1gymDi543WvtByT6_Xwhg.BAxOA2ZtrrV8Hi4oYK1cJaX_H6jT4xrEyvCPPoD6zxqqh9Hvh9Fpt1kFUQOumOdMQIGfZzN3rJedk2mv2JSGbSv1kjSvqPBjMtd4ZCLl1WHXCMOqqF2sLORrNTmv6i_q67ngY8WhKleafG37x_Wb.Pk_SfI4LMyVvUTHYEJoVpKLRGnE8vgE8ZQS_NuF7cynigYkTWt7h3J5N7SMixbHopMM7.ndDCMQIap9cEUZpICYRXQkGHCIW3WzxFVSR4ijwkDlDPWrgkcSZ.IyFOjBWxASZVBxyMbmkW6ab9jt.vH7b2zvZYr1sQh16rDF2JMfNNRPFcFgMuiMoo3karhkQIyUV6Cek5uZOXrNuidiiPQ.7I2akDjoz5PTR45CR0rXg6iLDm2pkpTXCgElnVDjt2voP0wDabcp94EWzCxb74ysIp42vw3T5V.9ilTXTllk6W_UvzqQ6eOFLARuotKkiMKwtMULqkI3AVWgMgl9El7J1YBaERLR1SDZ_RyV0Nlk9KO5SPUY8J_mU7xDf15jIvNFJccMggcZSCAqkYaYpJETf8jVyKuvT3E0XAvS661SmBDSblxU4YZv78A61cIpBBBrxN7t6SAdBuUwE8dnaMRF6ihsxS4Bqh5wJcIhFIBRVBp9fF8uKBgK0ww8FPzHUfNoi5.oza41QmDoMgYuoKpiJdEj5vwXfVW7JhVEoSzS1i2FbodEqNRw_jEHtSzeQvGsQ9484lUFc6aNqUPUdKrkS12vNu5kHvbFrBhaJwuima.DuM34hNeKhxKZblc6g6hcx1XlfmzlEi_OK_MWgQuGddaoFg9Rf2KAErtaw.oi4PLom.LPU10gMNvSPeP8DCNeBPi0qXPWpuiq6vqQLqhuziyxSjc7yiY5g5jZDDeCIOtTsVBHnmNYO8t.TOf_0KLghi3WiFo1I.l0MDfCjKuqdcoEnf6sL1ydkdIlo7ZBvMkuf8Y1GUip4xW6nfadAXFXwLLfSWm8wY0F36_vVPvgx4a6soaO7hqrysI4alpfbOY3IYSK037EdCveQE0syERzGw9O3D1QWoEVv6clpgYVxOevd1yMq7KFl_69wda5QM68Lh3.fD6XddDI79vYyy9r0hGl5gv.V6kKcyhIxdur_XqW8KgVHH2SPRFwtQfnbZwm8mf6XGjedbmI8Pb6Ze3IJk6mQ4y2dOV9b8L8yPb9KabQebERKELq5iVbhH0Z8ebqoiLJT7qQohMcv77yh1fvFTDj_r1AIpu_p8H9__x.MVg9_WFcOEyLw9uxXf0IGHY8Xoph_rT4XNeXcGOKD0PjeGMXXOCw0RUzSreFv4PIx80VSIx5pv_8cItcsALVgRh04zK9JReCKmbywTD_a_v_sT4RqBnU4rDkTzq0LSI5nsadcqc7NiAAxeZNIzVmsmpcyrZ7sIupyJj9eYDJ.FECjCQo9K_jwBp7L6icJoYVXhmTkNLQjCDBuDkPrr0s27ZpINhTXjig.ItQY6PwFNSa390hLQlL0LbytNc_gS53eqIGKDVxKFNb3D0LdQ59jo0Sz1LlPiz1dC_qAoyq.mHDnj4"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91358b7a9dd1fd83';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, "\/10000504\/bibtex?__cf_chl_rt_tk=yKboAyFSyEisNxMOG54UR5qWtouSGWfgdL_LyVGu.Ks-1739792869-1.0.1.1-MCISHGPHKivd49I_IU3WAaJ_YVQC7Ouy_73Nuh07.AA" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>