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: '91367c4c4839fd6b',cH: '4ecr95jz40LWZgngwsuEIEhq9OIN7P5KgDun_PiqmQk-1739802733-1.2.1.1-Yyx0Vo9n5agpXcnSBnwajg38YWCSZR8QZQ4pG7KANdKHVp531tqJJWIJhlMkceK1',cUPMDTk: "\/10004839\/iso690?__cf_chl_tk=erCi.zS7UeClhtePB6FbxoJQwiEyDL6uDICODFzuRDg-1739802733-1.0.1.1-mptpU9t2lEzGouTFtaqcvQFFma4plOnKO5ngbTFsCTU",cFPWv: 'g',cITimeS: '1739802733',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10004839\/iso690?__cf_chl_f_tk=erCi.zS7UeClhtePB6FbxoJQwiEyDL6uDICODFzuRDg-1739802733-1.0.1.1-mptpU9t2lEzGouTFtaqcvQFFma4plOnKO5ngbTFsCTU",md: "di3U89.DcNf6bn6oO9SJFYCD0Cy1PZlps1GKaYuDRhY-1739802733-1.2.1.1-9LNBx64CTExmoDbb4Ua89j745QxCUz6rhG.YB2qID8jZg__CTBsNgkdMMw8Q6SqkPuC3bA7Lkyh8Mp7HOBU9bjLDOZnRfjwKmn2PGJDUoUJ4K9azWQZQXeKQ4iQFYotFeGkhMrjwagYAHr46Cc9kDEDYjA_zc3Zbs45M226uHxl2Z_uYNEi3SEXY4aIrwog5MA0UbM0or6MF50UXrLH6oU_tsYtiHh.FEBKVSRpGQGfph.OF_6Mcq7axYMFVpGCvFECNZYBkTZsAfdhInK5iOa9z13paqj2Ll_kxK8WG_7t95PVhouSotN6PTY85PZY2vpjjRRJhfYG7UnauHwIvm5o4aE_.jYRHTU8BX2chFI6p844nSQZtubiogscs54iKJie0kCHz65053XzUQPPn4pS1LWasb.Dx_C8Hc4bY5SaKPl.lPmupH4hzRlGNn_0MMdP6aT3UAcN8BSwAZ0ccrIeQKA1aO3dUYwe8bADvlbqnBc5RRJTS9ysCAr2vfqoDAfQfh_zukSZQ.8950HPLM7zTecoYhDhb9uvc1EWQN9bg5VQv7UnRKN.vvUFjpe4Xr7pjn.DUcaa5VFtxGs0I3gQhuq3vCAq1wEyKtpl2CQSxaCBpnRjy6U6nJLfPBJ8Zxkom2QuMr5CjOABeJmskzGwYGaFYYAzJOJnzk6x882tA4FJa09O49n3Y3lyi3bYyOkEnVEVENERQZrfBKJz9kAAGeFzeaz4qpIwc72FQf.26.AWToxi3dCj2k90Ky0O9x625zanDObEJm9IamJ3mU2_xen04NHES3XWHf057Dk.JtiLOObAHglHTgUKTNnYrSTRDt39.WXVNSEcWrFQFeF64R3zNRmr5v5v_AThE5ffz3GnzsmAI0JRn..YTe1uURplczsX8cYHnjdLRym3mu9eQQGDxF5DjKvIaIyS.D6LP5Z5yXXt4.rQtDHc5hVkdZm._t3AK7vw59qCG1T7XHllC8FfmFf1x5GGdH.jHM8QlKKXGILU1ZFUgjnckwURBiovy9c5tn82c58MywVZ1oYEpVDkEMsQ0NX2owcqFlN5cXQfXu5WUUv.sZk50G3cl0ihDO3idiW4gcYxJ_S0MTFLFi99MbpdfY16lq6bLKwV1u_b4engg716ryI.4GcezIrXgjuaETuBvo5Tt2.KF8SuzYT9pb7QDuldv_zDCmV1MzWSbK0kDscb5GTl4N55D5uwm7pbRN8C5FveZIAwpGNXOkV3Brn.azLhYiwYzIjIwV4aagxMvZ7frlP1G1oq3njntdjca43HixBUtzdZhUW8GYA2jLBblBRHbBTHiESLNsrn7mPEhEu.oLNyIeVYgs7w4Whj5St2sV9Y0QvqL4cXx0DNxpvjoh7rDUtr6Qp34H_5EHvU1L7Nje_h21TJCeuLo7TXRnHqTPwUmd.S447A8tzTfIch_5w.2aFMLi5X4YG4roPGu._jNmKfrjS6wOZaynZ4SLaGqhWBPHkCPSS..PQxGAt0SahzkJJ0pJdOVxCpLVOqRt1HfRkx0sUmak03dLhpFO2srWr6K3MM_NWXm3HI4WREAj16H3_M0fvBFMDu8I6h.cBeoQE.VAVnRBFzboYNMXp0wbASh1Di7zsMV491QRd_aV_kfZvZ4.l3ONlkN9bHM7MmOVJAep_WPLdnxuSNCafQ6SlW9nDfE84iIKTgdpk2epnqS.ix7l8EUBTjvabRq3oDz.RqQSY8.wU6d209_Z4.2obPz5iIU9eyS95ETdXo7VQS3L6oWyK1y5SVtgK.QD9tD_zeSJRxMEZ7zGkZ7pIoXRSlBFNXAx0LqnHJy8TavXAWgTIGCUiUgx2o0PXkehJJb2a9B36131GCDbB101qH5a_gOYK.innItXh_BmFh5yiffIrrb0_c",mdrd: ".lSp.28m.1Tfsl4_sq03vHnCT_BYR_9pOnYhqBYa1po-1739802733-1.2.1.1-IcfOLGG5huq1PmObed1KQB2pdiutdm.vEh32VqtU2.wV.QT1HdIx7FUSbJUJJMzPCRDxU0ywRoiPs7fTbMRCkkKzn2sbZjlbbUsNmE7SukNMYG7pazESsR0OP3eid6XmaB.cUC9KGyg0E7fNvYtVgwoKtcIZUk2A47tOoIj1h8_wAIGfTowCt3BADVpHVbaaa9k6qpCn8YnQRS04lP4mm6phCGQ8mMcIx9tXkUNLSxaBWesOXKf5DO4fAyse.WxPc_knkeXSnxYAPKXfbkw78o1gN84ZbDKMmj2BlxfK9KzdMa2phK7ORhXys._BTuZ9jw_LgsUn_TO8sMe.C0mc5.MM_NfChkoCBwtHBu.L4p4vjSvS0rz1nX1rFu6B2gfbhBl6iGoDixzaRom2_GkQIKy5ZX7ZTbcZ.x4JPmXc1SUosJPkraxWlAthR7SXh6LGZYpp_Uce1eMWoc5bel1ZQqRCQtIYY0l_2j_abg3DautoS3dhpEjSvbfVSaVWjrCT7fA31_mmzmyDtOEW_tHpV.THx97nLxeXcclRF8QoPo.0P8j3yk1zp3EP8ZG3w5b3hWglRnkrtdUC2mwq5Q0satn24sGBCqokQ_fsf4MnSF8M1epIQG35Osg1nRRy7ahPGy8qtcKFHvUBjEIfrkQ8Y5ic7cW2ovvhqfEdodc3saFIx6DDkO_1PKELl59WOl.lXcuI8b3eM8ufCmFUmexAaM4Ct925Ru22WYrrD78WH5NUCIH6AqPzIvNo5h2XmPRXGbU8gvDp23MLJgl8kQnWCEPMsl1se_BBUmIA2bw5zPShHKED2rS4LXgelU4OU9Yoe.2.4N5BocpV4Ak07EbDBVC7_mxgJ3DpURU40U9ToKeRb9aSjzxc1GpMAb1KaWpREh1PpNfGqe7Yst_oimG_ZtO13btgvdrn4LGzfXunniWGqgPPhT8JYy6GrgLTNeE6XnfKpm_MVNOoBN66ifUq2DrUBZwYjKraJFY9cDBFkmli5grj6Wm5yWjnD9HXLKdhnSI_oxdaPBw7lmMdjh6pMTlbgxBrndZShGVzl5bcHkBkVfYe9MfioZyproiX2vrKSs9clTGgC7AsSESNVvcOen4vQbQtEK7TBVkSFuD8j6s1MZhuadn49F0skNmq1rNt8Dbgv2KP5ZaJO6YnsWru99esQWCnFBL9jUzavx7Pd5cTFxjKz86h9.4RgeaO_7q7S96QTPIMSBwOecHr88I0QKKVobQ04ACem4dzd3mZwgTFc2pJT38A0s.lcod9LHbJlDn_k8nIshV.MeYvI9d_TOycJB7n_NuAfaJymBP6lh7eD3na2ysgQYeI7xnOfVdmlSC45S0MLb0ghlI_UsFlqRqzqY0N2HChj.YNqH1A3McRDSIkZIwRfKOfGDaRNM0dZFUcUY2Mk1Jxu0bMU9Hnn7hwGZjqyeL7IyPAnw_mXXy0KE2.LJiyvYzr5AeyNAqcIJLGFwa10GadJWnk0FfQ0Z8zHh_3niOIh8tXCri3v5dOkfI69FJRiIfJyGMzUunbI3UZxgAmtC8cxTJpWGao20eF4l4xKPr2lrp8rdhsXb34yhxqVOHnasnnEccV9TARm2PKFPzH6N0Oct0t1AuNWrLsU6KkdID74EMu2gPRQb4_z6WKrP_IXv9bX94IpX18rQz9eIz6l4ODLgUO8v2NCsAmCvbH9CQxsRnQgWxGXJWITIkgA7H_cdMbWWCihgWxrDQ9xDdtR8BY8gV8A6CPeBWdBzGJENBodU1avHdIAvxKwK246MH5n8bepDROYcmJVpQJ2yAvm1C79Bg1XXJjQq88XNBKH4F9J28SFqBova1EL1aipeZgoEpJ046.5zhdbEL9Icf.DjSTqY9y8KxKzc3e4g103fU3zIduZLvrODcQl.2YE5GobLrNbnxIjAk4TRBWzYEpRZpBfnZDhFa4aseCswiT0BmY7dwvJmgFwNM9PsvRgvC4yBkO3VzeVfWi"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91367c4c4839fd6b';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, "\/10004839\/iso690?__cf_chl_rt_tk=erCi.zS7UeClhtePB6FbxoJQwiEyDL6uDICODFzuRDg-1739802733-1.0.1.1-mptpU9t2lEzGouTFtaqcvQFFma4plOnKO5ngbTFsCTU" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>