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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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: '9133c1ca5ddd8819',cH: 'X6FS2JyL0IlWU8HFl4B7TKIgsWejawb66Ngvc__ldQs-1739774122-1.2.1.1-R8iXI0QSltOFN7B7AxwqbBlk0Hgx_5iDgebue2XYceKNJrIOMd7rv7PFHdT433Ph',cUPMDTk: "\/5022\/bibtex?__cf_chl_tk=zer2p.cBN0.Pdx2VZGpcPw.WtAc2GsZ_Ah9EIONv.hA-1739774122-1.0.1.1-QZpFabiZidokppICWsAsJMjLxaORlDiTPfA9pylfLPQ",cFPWv: 'b',cITimeS: '1739774122',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/5022\/bibtex?__cf_chl_f_tk=zer2p.cBN0.Pdx2VZGpcPw.WtAc2GsZ_Ah9EIONv.hA-1739774122-1.0.1.1-QZpFabiZidokppICWsAsJMjLxaORlDiTPfA9pylfLPQ",md: ".zdvM1XFK6wFRP_W8uaH_Nw1IOgYqNHrLTyW_Vp.tJc-1739774122-1.2.1.1-fvNtghc0g42QPSq0t3YvIGqmwTM37Ff2eFcH_zZT8yVI31O1tS4yWIa.dHtednkkyYMZQEa9D0l9isHdq5w78DE.u77EPfrTCcX.nJlCrG5YQ0VG1CewJaLtQDjLulavQPh.x7MXjTvnrcLR1fm8p3TpEP3GNdif6MuMflQPc9rBf2qrQ9v3gyv33MVkf4uaH6QwO3.HtHkPenbspX_BCKsVPPEwdVKx.y53R34gjzeCMYICRvBJmJu6XFzM3zHOKmdPaQJr2uKugSlTyQ_QjSy9XdE5xA1O2fFGrTJw3EIAjgLmIU1dvmEBMeGf8Sy8tsP4LwDUpitUHflg0NxAYUop9q1767_f_TJ9LcoydxE8gUUa8cmRgnhq6ffoF9yjW3IjCNG_.WQGVmfYf919QkhRi3JGv19CnKn5kiqMTWbHktmUSHxaae9WJ.v0BFMmMl0nNTGXrm6.1GL1_Ji5pEAlRdlLHkwh62eSQKaovSbWEH0b8DBwZvHuMgzT_TDajzzUYUXzONjzFYfdW6f4LgED55wi9cvyc8Wry7LkzFGrEPmZpaj8dCv91wJctH3m5dsav_8bo7x1E4K.iteVULaAWvzgWOyqwdrVS6M0eVZ4FhBWdfQyzdPuScqZeEQptrzcLH9p2oVe2g8_IAnXyWN8ZLZnzO_EvRb2QJuCiNyu5EewTcMACmkimMHkPKc4sKkWXpzPpE4T8Ih_E9HX4Zcb3wGnMqJFfY3PwPKLj3LDGT8xNeKlRtM7Q8.Yj5W5vchwUUX0vBzXsg.l19wsZDEcRv5k3N5vvjdxidCIBa_iRSWoMeYwyvJMD_VWZOiH8HKt7S8QYpZiUtjTBmZX8Hv0x7.X.QOB0JzWug11gyIPadS3mq1__Hf_ruKsSd7mc9CGlJwPHT3jbZLVGqwZmY9tpM_GVXDJYhGJQR25s2FDVxw5uzP2_dOlssOTD2XdoqYGt.v2n.i.PWxpMrRqxD3zWpXAgexovFy.tTM3J_PT4PJl8cVgBbchJd2HTJLoWr_bJgeG1XBDNsd6roj6m92ME5VyQdGHdt.LiWMTUFfkoOWVcXHk27QtAsggd6YGu8jHz1ZUrvPr4JVLoZtMYzfZf6lVtpkO33xW_XU0_ZGfYkGBXtdLKSS1KcINPUFrnyproagUZjYkehWZPRJWS3tmrLmoqrKhGWDqkvPKl7CeiCwZtZs7i0_5VEJXw6U.UvOrzW2EWOcM76UXfOtLdBDR4FYWJg_A6BG5Veyh2fLgxMvw3IqfXb1.mSS_Bm_XmEPVeZpIQ.PSYtd7Og6LWCAMf5MGRwUlqB9bliP_CQCmN03pBtYWjX2Nm8Ni4nfUa6JywB9Ac2g66Hil8AnLaGXdq9R.V2nOtJJVzbmS1JncKFy1h9b94Bis2nmKakPJeHiNnKLLJr43Nv1DxDYZpfsNNUWbVGz_SaN6XPmGyWxdWIb4YGkGOBIQ.0CXoKfIquOb2CwEwqHN07ANx4q.1kCf2PWsSI9qeCaUAQBLk2OUqetqkir4BvfesSyCVFKqPWz939jauBXHrnqQLyPFmEv1Wtzy7tI6FWrFuRPmudABvF9AESgpBMoSUJst85h.xGsiauqKtvjefB1o1pil_PK6IwjO56AmuV1LIOu3Gg_vZ427jUFTl5xCcy9ujcPDY.KZq3E6RZdFJsY4wpUXG9_i2VSkyaRYP2e1RaouKibmYKSwOsnzYRCPefYmc1mnMCfvDld5HFZGnAndTKXbybelHb_lYYCOCO41IZuZrUkV0.MMvZ_U_IcuOTHmzY5Wyb1iLUJESBjxxG.U_PT5grj5SonERRg8g2dnSElfothhXjWe60G0aIrkCL.c4aH7ZvReMsTecoNHQV0p9Q7otP0u_5EVpyTYhcxJExp3Sp4",mdrd: "MyON2qN0pTqwjdvcY8tkuuzlWbdiVC3miTmHRxkYh50-1739774122-1.2.1.1-NhM4h.aa_P2uyvES..AFzvlvzQP14y_inikimewP_lqSZWvG5_Vq2czO7aZqs8jjp7J1a00iatrB.UI4D2Pw.Xika9kyfP3_dO_1KKv_1H3JurUycd8SHmnAmjumNr_s1kPgo0tIeZtNPK5WoJxcr7zqT2cYZwQ0eK8bQ3kqyHEdWjeM6nIPLDeOrGBpWBpuZb6LsPE_lw0wHekN4KTbw3YDhBcLt7RzjfsHqVtC0B8hLKIEy0zCM2H.L8mIBC._zKu9i0hF0_vRllYUOYaz7c9HyJGV_fAZKDnQoWbWc4KOQfizYllOmZizwDkFdj0Gy9pHwQP5A8Snk_TQRk7BWyP.tRavZur72uQEYWh.NJ8xT0D1rMcmlNxVAhS5Yo7jn7ZafJgcS947ZHmKlJenLJbCaYD6NQyO70MVhFY15AspqYgk.A_XLVGqJzDbzSdGxGDekkSJ09H.rhyr7uJprLgr8Kwz4iOBcGs4eR8vS1WMPuv9baXQbCqx8gYbICZyu0.i6GYd27r5hcXENjGRbV9_QE35BDOHAYy5n9_vAYuA2rIcC143rcqUzOvoayWD.tevOEXVe4Ecxm0CXFWUcQ0PkqYWW7iz17jp2kEQj.bx6rA8K0exaJqITIxPrEfPknKQ0xsRqPmyQrvuMVDFd06kksnA8Gjih6IoHVTJtudVFG8QESzXTime0Jpzn5zpG2Cusc9LUhJ4ta0wP9R7pWUkS1nI_0qDRIXdQtWcbGa.FAUa5U0YcksxW1Hf5IZ7oN63PfvojJlxBHBLMzyFFGawRfVwKsVcQzTy3w5PjkSOsI5rjfSsoir2gRSm05z_My2vgg_lQmkh4dxaqplI.5DqElylPX8mVJZ.ZpTrwu5QeNtlh746L2ywwf8fW6R2iVKoZCicZU4fX3CWLcp3do7K0VYwn_AtRdcHplE_CgWuktiy9D4XexSeOntRfLHvaW_2U6AX1pXmq87Z8Gaohn1fsJAw83HhmZsJfF_VDIOsgW_BFfIo4Fq2RnzgFpdVDuxKZeMuGrbCAtqvhrqer3hofOUz8EimUaX0NkmlyY2GGms.3ORUvN3gG07z5oTQC6SfzhFiNWZYOzOd1G7Fol1XZTD0lVzzYLTF9eSSAVOd_A8iraM74EhLkrXWo7TfLl.sjfW78ZcgZMeo5rGiXSDx3adlxTsYD8dY4XCexXCCm.gHNe0GfAE9dvESsya71ZMPcfQo_oBXcZ0UzNbHlwAc2kCjpE3QyomUS4VX4QKFQwoWb0POvIyNwFUAps7RsEuRaWWgn.I2mec15SqO3qivW8RZlE4W7_2AKDr_V_nbINRPw0S5CLEbWeRurrsDc9YeEh.Aaq6pvlBEoSxgLoPioh4afGjGkuoVcN15iq84.YyM3d1M30YP4i_xKCwHuPWctfWdCr.Uc7IkpIO7tj83Pp0a_wlcoz2LZy5kBBnAZcVXhud29Uvr8bKq.If_XhmX9jpzdZNNsjbSLO8RHOwCm62qxEAXWkw0QAbFTE88F97JI7o.cuqkXb_ED3mcOnPMwyAWUNXBJZQmSaJByqaDbqkyCoAZ7sngj.9D9i1ANQfjcBTQ4KlKjxOMvHoy26EAbNnFdSyJJDiajrS7KypPSbazpzv4.VzLYrd4VPlD0cVPbzn28HZa3G.F6xqiJkKd15ymi8mIPYQGznwbzdqXFeP6IqH2u8P6fShy80Z4ZdifkoHQNBwRv_yRDTJhBfktcRLeq72ewK3Xtqo4gr_O7iyaRNmD6bbXitPYM2l86_JWZzyPgpH.V8ocATUHulxwzeUjxNRp9AYEAl6.QTLW74tQOfhNTveyqZPntTpqIfmR8SmCtWJVtKh3epDJi9wSQNe9nHIZeml2zYGCqlI2O.GD0vPlHTUF.QtdGlbefy1PwbCgJUAywWB6QOdO2k6PfzkhJrQcdbtHYtGIGUVAcg6.Hbf5QUTmzX5X7GtNgE7.TQy6.6GYi3Vg38cz"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9133c1ca5ddd8819';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, "\/5022\/bibtex?__cf_chl_rt_tk=zer2p.cBN0.Pdx2VZGpcPw.WtAc2GsZ_Ah9EIONv.hA-1739774122-1.0.1.1-QZpFabiZidokppICWsAsJMjLxaORlDiTPfA9pylfLPQ" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>