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: '914cdd1b787a6bf4',cH: 'wewtRUGDb_oxO4j6H_JMIobvJGHEfsKXrO3RMZEXzVA-1740037385-1.2.1.1-fUWFXx_6fE9hYJlNIqVrQqmHedDKll2yKTh7ey0o5FeMPpo7YVV67oVsduV9CRHa',cUPMDTk: "\/6565\/endnote?__cf_chl_tk=cYsKj2yHY8SY4LQD54FB9qwusORGIHRcZLA6r483iqQ-1740037385-1.0.1.1-iHhI22Fwek.HeUEvnplIjof8mCtnS4zCyBq9OlnBbYI",cFPWv: 'g',cITimeS: '1740037385',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "unsupported-browser",fa: "\/6565\/endnote?__cf_chl_f_tk=cYsKj2yHY8SY4LQD54FB9qwusORGIHRcZLA6r483iqQ-1740037385-1.0.1.1-iHhI22Fwek.HeUEvnplIjof8mCtnS4zCyBq9OlnBbYI",md: "VPzgK6EQntZ4BI7EDPe1r08Aumd2M9uAWnmP8qlG1Ag-1740037385-1.2.1.1-koiLq5GDwB2XxhCoNNGEZ9ho2MKPMCGhQYvQtLxYwIEvxz2xjA9hXmsEkpOOBQJQGxD9_.gV_6YX7owEe8Eb_QfCaaPRQ_qLrs04kQZElng3kev45MAgXvIncHjALucTkKQ74qO2Sf.YWi1ShpldYa_yP.czHox6X3M3MG7EzF52dJpvmDlsJrgFq.goarXoFIIQ6.BXEapO4L5sMuBaqZ0_eQNw2lrJLVwG0VZhwbqkV7.L4UyI8I6JbINihaUa2yAbK93RosRIcJedQRcX71ZtOn4o15SIaOHqyPq3WLdCru1TujxlDmbC2peT.LKmbsh79.zRnVB8M2ZYvNJVCtbujpFo3C2Oy_uj_EyUSgkjfCHgqUvtlraLBLgdN61ZWQS828ppsrM5F845krhiusufGZZWhg4nmSIUjeD8gRufhg2jzdXi43n7FdCyyDHQOMSl7JoXLByq.lX2AOifp.r5XbywZ0d3j46pRjYM7Zi4jtJ03tiCxwAcGejQfVdP1IXq7uP8B8WxGQOe24YMPmw8vPxkAvA1emIyNv7YgZT04XJks5yPNhSmw5nqwV8JE9xNFEBRgdI6RHtcPu8T7l5iVz0HMTuyrW6Jw5APXRNyIKf8M4rKpTRPpGmTSrRl20CjG0UWtIwK4M_pWSoQme.7UeZRsKJrIwCiZqAsaaLS4ZtqDJ6Edi6zzldyMbqnEQfA.g0XpbHsik.wOICNNbtnNtCEKdO0sZvGdZfcw_SnZWF9LhpO4zO1GnQxc_yzzgWM0Uv.vQ5YvtadkFYM19PSCa3Y2XHd0gst22HTFaOwQWDz0xSw5twiV.5UkjasKF72KlEIAphR632Lr8EqLPRerpstsbWOdQudR7mtRYiFl5sOcLZVrdfOp7rvfVs7l3FvbmV0gYFuagQZr83v25veoMUGT3gxCnk8x09FjOyd9cG8mBcgd6sU9AvW0WmzyThXMJFBK2z_ufgLoQBwphWrfEdlYSIboXnmdkkzXYsCSrN2HUdhu_YW73_1QDoENpH4w8TsW5IGhcm57nz0kq8tqO9D9YePiZvFbzci0PZ6ACaa3HqnS33dYEtqbnG5mzKf3ljVxoXufo1T1riq3YMgmZqBJZfnka.H.atf0gavbX1oldQVCwBCVswQBbFMO1hi7kpPzbokiTkAOxPPTmI2SiqhcxTAudRGpGoAX5U9BXqvU2t35Sgvfbb3Y5rsMKrr67qI6iMS7wavK1PSawNbLoxJATTIk2A2_YSF7Zl1ULOPtCWLaIowZvcbj4Kl1inhVYT.6i5S2PJngoHSg1fPWURdD3vOoacmpNip.qKjsoIdeV1E7HojW0T72qBqLUFSlzGupFr4aBE9BIuuLO0wuoILndjSXWzlwLjR3hsDCuh49QyniC2s6GmZpbzn4JQzfOvE.4_lsXnHQg02NivnOzHeXFGawJE6TDJYeqCbGW5VSaZt32LWyUgstdPLavtLbUw3hU0sNOtQfF.6ZP7sYURUgCQnZoU31m5kDEOrVo0mCT.JzQOeCTt.jWqyWqNBcauC9ESE8cQqObw5rauDmFkOX7oHXTIYiYtgxzX10FnP9oKzyPUxG9YMb.qrkVIIoRLy8Y3u.l8Yw3CGZoVAa9rEefLid_GsCyN4pjHc2pdehBqjsjZsUnzzTr_NGlfkV3xlttuchOtuRZY0UnqIki7APvN99M3U_vUBobiKYMCUL.kcT9q1IgR0opl6w4lLOmJBUQHRdMCSOpZuWoIAvP7sRuF2eleBqd4worBOV0djj7.1Kwrm4JgyaaP6bXDGcEaQkcakiFuCY0kEvF076wowGgX.O3w.jmgQ8zYhL06GEeoOoUW8PK3vOZktPVvFdmudP6aGhh1Br2DDzuZ.jt_n6OmohMpY__1sG98",mdrd: "UuZdNHWTH8C9ZuXD9DK2EBONCov_.0qsscnE9Wi.iYM-1740037385-1.2.1.1-1DoPaFPzF1bL8wEcNXuwZRSDkxB2yQRe7276hZpKMQc2NjQPozHHU57mHmxvHvHWspCErCcHpV3PMC9bJXhGxpel6vb90j8jSqFATXhL1ww749RjtZ0Q.1np8CYzIvx6o_h7_174_nQ5zJH5JpmwH2qA3qDKZ_c65h0jqWNukRHLZ92PDBQQp8tVc5nqOiRrL5t5Whn.v9ho4ow8e0pH_NmwmUcrStpJncpPfDOh.1tyzqJD_xTtzw.SRs1n8GE1cUTvAGVz76rnoCoL5tSRyvT1vxkt7QCRAKmxgMiwsismpOYIiJhIpyNjh_BThapvQX2883VGQT7cspLw8dxS8e6MM3NNSUH8cNVfTf6KS6VlygywGLwxP47lUM1N9HIlUfOodmTP...VAPlCTXWawlJ4fAIrDxXuQqju4spNwZ75q8wyj5s_COMhveKJOzcYKjvM.U2l_PLBlH7tMaiGYkvxkUJIueromnJy6BO55e_rS6HFChUVIkg5tCxW.WaTPaKhSP3TTRsgf5S.lVVF.DP7jjn1VUQiyMkzmIFKiKkQHso1sKyO6uvA1Z7DpkvAGvohkEfSpoDP.LzqfOwayVPX6_1Dav_T_zD0Iji2PIJgQCpdEsBu_4UQj9DF0p9nCwHKEmqjqY0flzkrMR4zR36mmvE6tzuOcRL7Nv4uetecEo8rVdPjQotfIwIUJpZS4hk_ogbjJWRiki38KNkUEny2HWWuDflmBJvEKLNA6HgpYRLUIGqeXRBTEn1bEezqs_vNCrnFGa0KjRjLE_enkZNmT5qrGvg0CRoSvjxOVL6anUHGjTfmkGXrDKHlH0Y605qFL0HbfAgZvKcROO18PmyCjKpmp.J3wYXAULNTfcIBcGSMC8i2D2ftqnwq8ZgVQd6tBK9QzCFeyK0Zhio8xTKZ3Ju.raTSGVK.iNbGr7zi_q31Iiylk7iVgZo5E0TmhZrqO_XBz0rxV0_ffg39TV8mDrKTYx2gTboSej0uqY_1SVd40PNzDiFsXCO_yh.tnbFINrVVdqn9XJ87iZl5.wi4.pgKejyp5o9Rp5UWDvrmLYFKxZz4l6K2lMo_Hg22zm70rSpgDzDmFYN7t6fcoAiPb2QcDc5NhFkumDyEDqDezQYw73.NM9IRzMojzn7CbHW8W_qEHoJIdokRbjfytWe7W9fpHqTeDn0e9hn48TiKgJlPWJfRMb69W9J5D_omwQNHCm3gxS.ArTojcMAMT.IJR0WjJkUwqob0iQ9KM.ynuPEdPWIg3rsiOP8S0JW9i647Z5msAcW8wytllJzSHpVOY66ac2AMxYiJVd3z9If1iV3f1bfwZJsBZ3RPW9NnsKqlk5XM51Id4hNQNeaMHurjHp7WgNaCLZezjg5QHLcw32IYM_r2EiYHlq.RqEfJa6a31ax4KycnEZvy9MOzTyNz5qKaaR12cIshFBDwZdKzvnxIhhkgI.iFKpfOonGhiVErONBXvJR8dK6avp6G2ForQ4vAHacLH89vksDv5jZDjIvT26kALfLi4D52wclaa0O.pmfCmY9kiKfFxgMVitgUAW5olycuEiVGMa60sa5RGW_jsRMHU0QiR6T_qC.xK_Y1sgJsV0JKMr0BaQURNxH2MeBGAOgklTSReSoPkBHkp.QW4S6NrddzmOfGg7bYr0CRXMeuIIzozSIXdZ8QeksIak87OGETv1aa_BI_G5k.RzVL_xkYY0SWdSxIiq8UJoPDRvS187KIiD.5QDz78Ok0dIeT8I56KnbCmZGyD.My3SJm0Vz2jw4JoVwyodaCHKRumh6Xpxaz9ORUHtzI_BIi0b8Gj0QKM60b37y7A6yD6ipHbSOgJ.eE0k5fCZlRfAMY0nyp_BI.lXxqS.AsLlF.IK7Q4RlcQplQYjph.SlxGKEECZgVWdn.EKUCPJ5ba6ZQssWbW911XkkXbUHxHHOzYFP73pzSLGJRCzRcfWYY80QnNGz5yOwz_2qL_6NEKJe8j6Tzq6oNkK6776Q8cQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=914cdd1b787a6bf4';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, "\/6565\/endnote?__cf_chl_rt_tk=cYsKj2yHY8SY4LQD54FB9qwusORGIHRcZLA6r483iqQ-1740037385-1.0.1.1-iHhI22Fwek.HeUEvnplIjof8mCtnS4zCyBq9OlnBbYI" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>