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: '9134bb3f09369cb9',cH: '3L0JIp.EKyjTmwphjPVuRDUIyEF05vdklfNQhcNkSwQ-1739784340-1.2.1.1-R7p8sz_U3L8OqN8smFEFRzn2k.DJmActcZJK0_RqlVsXIfTR3FLGn1aLg4HwnlYi',cUPMDTk: "\/10006850\/ris?__cf_chl_tk=mpJxO3xKgPUJzVttkDC5Hnz6HKQzhOsWYuFHDbULcwQ-1739784340-1.0.1.1-GsPaUbfI8oieqsakA.WcqOiQCHvoD5B5ZSX7N7RjWMA",cFPWv: 'b',cITimeS: '1739784340',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10006850\/ris?__cf_chl_f_tk=mpJxO3xKgPUJzVttkDC5Hnz6HKQzhOsWYuFHDbULcwQ-1739784340-1.0.1.1-GsPaUbfI8oieqsakA.WcqOiQCHvoD5B5ZSX7N7RjWMA",md: "C_2KDxb8OXxkAExVylnko0Nk3nbx3rbI9Pujr3hb7YQ-1739784340-1.2.1.1-D4cbey1X8SXXKLYxjvU1gwOoU.WQ6sXjMPwf0CWGMCqSsvC.9AXIb7apxXNOeCHu3LKyzK9eQ4fCJYIub5ZMzp7iz8nEOOUkMoPLHhQ_3hEHOF187Td2Pkamx15ygGpp0sNKdCFQfkOIVIJCD0pcZwdhv4sF1kVsUVJkLC1poF.J5mt91.7yWllKLlrwGTzCqRLceXLH74dWHDjpLrT2CsdznRqsC0SiQdS6Q6HQpz4uNC0q4M1rvv0jVKPNfyor7yEOpL9_G9IvDBjM5BL90LwXaakKFgexYZMGSpfJmdcjby.PaD9kJ.fOwvcbI5_td_qONcGEAa3mPlZLNanwVNWtr_4ca_Wj8rJuS.yiirQsktM3x6bjN6ZGAN8f_S9.KZZvRSIgtVopg1Nc4kx24GYnmQ2vAloe09Ounaxsv7NQB_BNdUAm5YjdOQph6tuBjY1GHnk4FZxmWE7NgXfTGlRB6UcaruKM0_mKAd_EkENSDSx097vcMLzfqe2LSSxnf.mLIJashKZUhbppEeK6ei3jzkzkVQfdoS7Rk7OVgXwxEVw.j0J0kIlfhFoI7kMfPPwnhb_K4v6T6HqPhGAADkX.vmM5SGBoixHTIBg6PgXTzIYzPGxe15gaTw0xiIWudu.q46r1uKrChQR6VPXZZG1iSN1OHcGnDr90WCYcSURGADF8rIZ27pC1WwXh85pbU0tbwGgoZVUtdJGNxrxbwnVZhd7Ii_ESObmHV2qDn8EFqtuAQmdclqMnmrAqOalLfBjEebBOD.g_SVAgUgmRJQQ3g9cLyoxXVKNtfWvQV3QOHlhi40wAkl3o8ah0sPHMf16d9O6TTnpOWo4YZhVSSqM9c7pthf1rDuCjMfebrZ4_YQdUYAzSqKckCCEpaQEeqXHP7MbfELTIB8ACGAEfRPBPhM9LzbjMgMZA5CuO4zG7P48d3qw41jK5f7wjNnRGzvel5nx9GgeMFKqmuJoQC5ofhD65QgTvvsrFUwhizjKsih2tssk3Z7Mp_sU8sT80Zjw5iaD4Cmx1lOdAuRBoM09Wuu9sKszUGBEtO_lN94SCczhyDs8_kuRF5NXJ.R1RjAszRhYOg_vCwskBgPgV1SQiO4EYWaSO.zgN5WoUnySFNoL01Jngw6ur_d0heFXyYqy97BynlTLh_q__J6_qwS761AXkdEZ0KobikLCG1f6EXh_6QpvszuUkpWAAHQoCl9zk7nNWdHtYP1XP_eLwYAtX5cNtSMA4BiyMk9wGv3jSlyioapXpjd6QZK3crOKVNrfbRuHDluMfMwB.rawgL0PxCrIGRD_ELhN9sHhRgw.gxZPQs8fEY8WHSAqsdTPLdQY83EhBizQDjvZjtster8.oo1L8UKurh0zUOM7zBLk5FJokUQchsWqlNJyuy260Y7QiS3U50qgqQajPUCFDYWbkWDujOT.Z9bKRmkhP0jLQLtoo9c8NkS66El5y26I0fTzYpCxlO5.Sy_dP96LoDzGdY24KZWmbGNJgavPPJ5O4GnpfCI_NyCjls8JGcJMDC8zE4KA7mvqnJBMOnmKtVzugr5J2t_9ZTeha_CwserWHY_MRCFDAA6e162C61udtCMABT0dJBoM2fgXwl6hdpMxLbTshxfYki_sOa.igSohYhTP_8a5H8AMPLRu4lHHP6JxyEWoaus9k2eBRiLq.186zK_Au4FSieNdlNxwE.7APJq_DluWH7O2a6e_zgm2paPLzl140MdqZw5vxv9RSYZRxRit_Pe00ZDmK9oJazjXqF_liyj5cqTX7OhE.hGn6bkT44EOxLp0sxQq6VXK0wPZYvMKx1P0lko9kdHzWzucCwHVhASpbjUMzY_LZNevWdiIQyuZpVL.ZTF_8gxBtSdV4Vh28WBxMqd2E__LedaA",mdrd: "5HNHoTKRAcWL3lvAHfj7i0B4mVwGwuvnahZNO0iN8g4-1739784340-1.2.1.1-l3vKayNR7D0mzfEsGcSgR17pgLtPh0DBFwoF_XCQYJkVvmwcev7O7nirjWDROTIiohgbhAxYdDpdo9yrE_JuYcmjparSdipYBsSRXHuIGHjk9jbSNCu6o86LiyDMS026ixFRiYtJcjb305D7BOinJN_mUp2nC1QFDgJAYkRLCu.JUyWBfE1QkFMkfvt21ZM1NV59rn8ayN2qdEr1BIviBG8BALubxBLI44DMMdbgNI4eHRwZsNcp2tSwil4ZHDfTsESNk3BJ2b5Q2J6UcjfmpGfeoEpFA6zD00MPuh8LnhC.TG5ToAAjBK4zhWo7GrqrQyByXsA.sjQ.vcTPAQCOVA_z18KfDaCYw2asEd0tTCPrkLpd.gFeRws2L3CigAfcno.tTFm1_7JK5KMtXQEELKXBVN1IpeqJkXuYx6dkar87fGyHMv8zmdA6hQcBMJfsnsGB89bfPtMIzjkM7sitdqHk42lWGj7vnH8vXV2F721z5qISEOPKNcVOzNLMb.JXJDaU0j5nbp9VxzcBa2meWJFtoIa3W4ewpGeuXC1wKkCnPYm0EZcphBHH03JKWKu6sMhc9q8nRMVh7r.kJQlGLhrKwPuncFJGuJSrw8ZOrylaYWlDp3BMebWXPCBvLuN7b_fFAGueJB9dOA.FxVQyeN5HgRHcWIViKCRKfO50hLUuCYuyKrKqG2La5VHx.UgGeyI0BnI8K5scQ84nu2t_eRtazsU3diyn2ijn3hx8.a.jHxewia_ZyjIXsFWGcD75l0zYpG4_DNt2lflYSOiP3slZ5DYn70CG5qBZ3VBZZW7Y_Sor49gFBCFzkfxkwVUSJ6uzYQGUsvIgN_9SrTYEgJuF5LiiZVz7hnBrTT02Hth7vTwHbAdJP0b9Kaz_9WZ6TRJNyZnVn0FdeWznvw912HJ0HpNsOOboT3EIY.1r2pbm.DY5BmqIHd86Knn5xoVStF5TwjgFGugDo68SlO1ibSruZHX.HGkH9dGYYmfw4P1LFsQdeMdUVQLL12J7pbaXWDHAQ0C5U8kv3xHM954jgBdY5HoPKELhbUqOP8vZDemz43qN.01b.rigzXMYc.tGquSJv_WFlhJTQh29_amE80bmVNgFOjSDD.G7IElPyG9eo45zdUg9JlRd_D6NV0KSjR4wfiCCGCmTP1rtZZZ2HEhA687fOjTiEfXb0iU0oQUWSsLIilNPn0vBs_gxGBzCf_7WQhVxHduzHdJfhZUydoK3HCqrcGgf3vlZoqdOhTaOWOMbf4Fuhd6rh9HhOPteCKJR2ucMii2FqKvUULNNf4_Rx2Z2QpO_Obx2pgBO925BFxTKE7BH6kSPOKzUaIONvxhBR1sqa4pbB9D5nC9aTlbuDWDUL69OBV2O.QgKYctTJvTtsNzHQn3sDX.xJL3mYsUvd1DyWIlOL_2wZVCoMtnD4NjEuPe5t6KBtnX.oIQ2Silv.DBC2XJTDzv.oOuQFahlfEfehs2ZgbDxPiu6Jmh5duNwFmfhdH1YXbvp.Ksgn.f3nbBPhQhYIOgZ.uzayYHn7JFn3Mr4qguLOCgT91QUl7XlBE6YN.BZm844C.ShuOGlCKHuCfCdWzxh7ZaulvvXrUKHS7iFziPJndqXhbXLhobO1g6ggkVa_T_4Lw5aiSu7k7GLA_cFoHH5AbNpMRNeGecFTlhVmiximh8WSew8yKvREEpWy6yLPyJVZNZt2f3DVO.nISrFOOudFcdug8xVimb8asPrUWxIi7w8aJNWixJgOvYjq1XH4z7iqYgdlTx7mYFUkC8A8QLY.sEd15secNFkwK9DXyvjHdoO_UyJMv8uKnInuhpsxZg7CtgJseKmOiNsd0AnTkTJVQCu.PUIC7lTrzRC2i3asTUZvLqENiZdgcp.lpx2RCTszrY9oohjFlyI3EJj3uLPkqwTB7XpuXket26n0H6FrrPEGMGmPDdY1.hcu8Ew.jThbbatWXFvGweS38qSg3RX.QeffvUFUIh8Fr5mFOsDdIukKw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9134bb3f09369cb9';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, "\/10006850\/ris?__cf_chl_rt_tk=mpJxO3xKgPUJzVttkDC5Hnz6HKQzhOsWYuFHDbULcwQ-1739784340-1.0.1.1-GsPaUbfI8oieqsakA.WcqOiQCHvoD5B5ZSX7N7RjWMA" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>