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: '9134143f4964a042',cH: 'aXKANuWYGKXu1bELwVeQGmE6_RvmDxSzsXzzSIDzCDo-1739777500-1.2.1.1-WqvF2GXGZPSXwtYJdOEeweBHqz.ZgpzKGsMnV5wgLGBfiD0JoppA0cOqtKJbyzav',cUPMDTk: "\/11866\/iso690?__cf_chl_tk=1Ndo.T0Lrcf37ySM7P4GVm9VteXLR66lXCllWSYUtBQ-1739777500-1.0.1.1-e4_2SLPik9XKTYgbWLZq8t15OsQETOUCxKhTmoM6qrk",cFPWv: 'b',cITimeS: '1739777500',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/11866\/iso690?__cf_chl_f_tk=1Ndo.T0Lrcf37ySM7P4GVm9VteXLR66lXCllWSYUtBQ-1739777500-1.0.1.1-e4_2SLPik9XKTYgbWLZq8t15OsQETOUCxKhTmoM6qrk",md: "5G.C7RMf4z1MThOolGs9ynJLOA.0vwBBZgEazXt2ZRo-1739777500-1.2.1.1-KLwex7azSocTlVnMsVfc2rpji18S09dTe10qZLOZ9fNwHFlXQQnsfNxlnIWsvLxX9uADmjZQLsko6Rg.85WuEPlc0kFlF4UlAiPZV5IP.q0Vz5s9KJOEnOUQdZLcNQ6eIh.pbsLmR4uksehuWx5QqkZ.6hQ.qjHv1rwmkk85z2oms8vS6tR0eZRDBUJXtLNfDlObLnfuZctP0h4eTSQuFb6E1hfTbhB_kZsLRDMsa9GiArmhz5z22E7VJx00_ek5F8ed0vpplJ6D05isPdirNWSNxVHKmeEKfCmcWFzLDdyuldvwROpoM642SeaYndVvXBfc._R2_u1DO0X97OKhkuvQiAF75pkGWP.r._lQaONKLTX9RICisAP.8XnhlxJ4NEEZAvEhdrL2O3bXdS3XXTFWkl1NrAoE6DgjEYz6c.73klmCW7X.9wwm3AuofYbppBvh3xP8c0KTXmvnZ6OlTUyPulR96wtBl0_CQe91myiWIWkXIRVOdJHSUrsfILtgUbaNZDw.GHtehk.KyHNOvnKQn0681NkIPRkrxj.kcWPZmmpSKScFRFfnpK4WkkHxqF4cTOjTE5KU8ybjaLZeLeq2tjqmycjATKofhOU2gcrdmJfiM5Bb6jrWMiSnFTBe7UIxtibkIdGUBiuvEndSVTivxD31yFRI.MAaxbvNi1MP47JnDEaSisGlq7gNUwwNwIGGZk5L2YEJN2_PI19nx6pnFQJ1BRr4L05KroVqI7XwXVfyLiTVEthbwFuA3EtkSG0SNeDBf8rIae37HrT4etq566YgQpk4M1uc1Bfz8OEnGYl4SYbKFOjC5WFl4nPXkpfWSZ8W.0J5.x9UKmreo0rFrodrMetZM6OueX3uSmZHDP5Gh2XAv2N2sY5YwcvySy0U69VhY5Bv0xalTvGNMPYS6csMUCpdBWvpZrAR5tCkAugs63Ris06IU3ubEniA2J61QzTAa9oyDMIFPJLGY4TDEmwyqoeriOOhp8ePf0Ey86u2YyDEtz660wfO45U3XAj9wLLRlpGhJaw5Fmwf_WQKpBwptriepYgswhhKLsTJlMtygfHUjZ81iIs67jt2aj8XPojfhZUAs5Tdrsd4S5hrRfJeug15Vu7ZQClV3n0DHCqt4bsrVHTHmep6RunXlb6JBNh3uGAvv31CS_LuZNubSnKfkBuIll3nmFv1CJiyZLY_4EwMFJDMf4U1KtTjvgcTNUjlbXwUMH5Gq8kKcbM1weRWGGJHndv2vp9gQHqO38RMWyrtiLJZtoVAe4_WbgZYG5YpeGlluXyjnO_RkhYtijmwwbZx0GhsKqEBckJ7aT8ZJKAYBXHN03Lo0M6xZqpyiODaRj54SlzBodux9bpkAulfVHOqwVbSAqF2UiBtZJ0YRQOdL8J2iCjG27y7tMPrsFn2H8V2J27jNK90QEFNE5liCIl3TDeGYPdjJxf8RExmIv6BPeeexpSWCUpvnB4Im1drtIj.KBdhQFssoqQ0U.LYyO3JKKgs1XRv.Mdy4UYvkv.4BZ9_3WsXyPQvl7QSCxEy3Ogjwye3wlpymotEqrqKlmcXEUm8Ve9596qFF9jdNd0F3iZcx4uxVM_I1kQl02s6lZP53KGVJ9sEO6oP_DsFQiJjCr6RKGl6ldxIOeFuBygRRZWEPILEOfLLFjiTJ8JmyhOl6QfXWm.hVVkIJUemIzpdOCnHtToLHq3rL774Zy0iKkvI.wdErgHyu5ejbYEcNf2Oofz9zjnXCVd7CxgenTvEviWorIni6jVKUJOT1TyKe1TYJTNvbSAlNdU5rY6unvcHMxP5Gn3zjJ6fKVv8sr2XFn.mmznMwRHQN4IInKiSn6UbaNoe9rg_yRr_YMP0GIMATFup8dY_AEyUSGwRxWsDao_WNvRUcoM",mdrd: "a7dsSOf9aGSbfS1BOAED12jBhAnKa7SYIbVU1Z6Vj_8-1739777500-1.2.1.1-PwtjrLQ9b1zwSBmtLmJ6NoLofkFoXVUyX8eRX3VvL6GShh6ldDiaUduiU0CK4DMSO8Ot6rFLrixWZdY4Lq_oglmBerSswMn_hwxx5zPAT4hs1VYG7c4KzK3l4x8F7Zs8JX.HpTBE_cUP7TXx51WFwX0fbgeiSTeauosMjx12PGFA40u_zDI3Aea09SObOyIZSxHNcXYEw9HwQlvWhtJtNAlUeorzzhK5EwT3427.C5jdwhR6zwvUdPJNyL9lIsDSR99mp1wLRH4DNPWUBQHoBqc3lgu8RlqAgCYXr_H.peQi_FftYmTROzUrPYSZ6C0_U7hcVE9MmQwlsQsUWLFxvuMjfJzCD8SEQSZefRJH_z634bVe8wxWCuF1j5nE8zTdlEJ6WxH9ayTwQuWYuNfj7W14NI1Bdm73aEyIhZ_Ep_.1eGiCYsqmpYt0J6YGLMIPcjAGILFrTrWYmeO5jqzCwC4d1u0mID3Zgn_77SCGJelwoThkv9NRZ19IpSklrYJ4SGVC7lC0g_9GU.pcNY1gxxG48zabnKqIIsY4pSL6O.LT1nBSvP.WJMtQc8Ip9ZznMWeBKcE6OMEvgKIyhhVACjjYa_WvYMSSvdM2n48w3IFLXC9E1W4DHwJLQ7GnYRg9n9Jhdcjpjpv2LUh8VqmHKOxPWIdYf00dFMVSmzJ4UocUJk4HdqM6VuldWVEzf4_4sLCCS_5G68CC2MiAFUWRLT6fAm50qQUI3ym9WMBDWbA832zFjNszJRGybAHHWMNToJU_oDU0peJoLdAWpA.cKxQYW4HedHljh_HbA0sWu3gTaYeBlmGdXPJ_7zqV8yrskyKjpIjzpF.XVGUorVGodSRrlbHjQA17Ca3gATolJaqpXx9LjL6yoBfsTSP7a_zmOdORRBU60.mJg6Ik31Lf.EXgdTIv3hkPJKCZhCKSdSrdx3riJulrI_XGNooEkTKpaiJiCbHx9Ky1NUrlLBpACe2tsFmlmdzcwBTD8YwvqvilplOIAZD3xMvBTGXzl6ac0fAZHe5gObWpFLZspq4zYCawp8ukbbdmW35O1Y.5xbZGL4loGKxAppoYIg.Vj7MU_suxtf8YUGhV0fnp3X2QTtqHal05e1Vh5U0dsjDjZxGpRE9QJu1OWcK0kdvBO_eTntvQ70LdiRnvKd0IOLP9a2QqBVMag2YQLN4P599PZvLYWasjqH8wNgGaRaeQ2Vb328s3J9NJEirHgF0FSBhYJA0xv6zSynwuBPEqjtr3hRhbzMpmBEPnYW8r2W2SVnPtbW5p.yMJ_ug_EmpCGvFlaM2BM8CwAa_jeGVlTHuS2wfVIWmHMCuBvzLWE3GyE2COBCewAJVpqLEdcbiVPMgYamkRXlsu.OxHHZXK539yOWf32iPaR_4gKvRyjK6.beiRzOZYfYH63U927Z6rWKCLz4Ld0g00Cz07Xnir1m5o02qCTWTWTo3T0nhf4t4tdeH9HArs9LAxJUiRl1azR1xl6T4Ga4qLqNxH858Z_eO9wbWm9QK7_qd4BZZ0hHrQcynCu6DscJT5vVnxjZRc6FCUeFY0i5lo1k_aokwFEFB4gDqiUjCNcrpe52DeZf2UPmAb.CpXb525aYIN1OAGEzT.rv_7ygovcAFj6sD7AkPjTeQsnl9lgOcHRy6qhMGCuGH9sb6ty3M1ScaGKC0mgbT9qY1yJyKeahDvBEPHNk2.xoNJqtlki3RQJDn9Be7hZDOcJ83HoBHlb1WX21tQ.UxGOPNmIIyJQ1RhiOZsLi1mYUY0qI8J13aodPCXykKp54t7y2FbGkb8JqEFUT8aP0EsloGZuzdCBIxG_Uy7QxkflRqftkZItg8tVRU5GEpAI8tKe3MT6UF4NL6eyZdTYj98NI_.jmdaf6n4aene.07siQXNByOfaKEhql5hPLqTpWRxDPzOnVGZ8ZO_sYYy8cesGyQDY_vZnvnUtwqqWhKznhe1xZssNJT06q0gMhYwwRmn2ZJ1kYTZMQzPFbv6q68MYg"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9134143f4964a042';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, "\/11866\/iso690?__cf_chl_rt_tk=1Ndo.T0Lrcf37ySM7P4GVm9VteXLR66lXCllWSYUtBQ-1739777500-1.0.1.1-e4_2SLPik9XKTYgbWLZq8t15OsQETOUCxKhTmoM6qrk" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>