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: '9135fb0daec740dd',cH: 'arKYzR8Je6hutR_b0elollQRR1JI5U8Xual13BO39qI-1739797439-1.2.1.1-ixvLI9.BDmbTcrrroAUokD1y50FudZmq9KQ2B14.vBOjoztYhTfTBrCcdYJU3uaD',cUPMDTk: "\/5889\/xml?__cf_chl_tk=CnV2Pe0XEN36WIHFbSQGhifHmwW1WLBX0VS3._YGvY8-1739797439-1.0.1.1-XSAtlg3yhc.FCEG1OqzPTF2RlbKabXrGqYZC9w9p3Ro",cFPWv: 'b',cITimeS: '1739797439',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/5889\/xml?__cf_chl_f_tk=CnV2Pe0XEN36WIHFbSQGhifHmwW1WLBX0VS3._YGvY8-1739797439-1.0.1.1-XSAtlg3yhc.FCEG1OqzPTF2RlbKabXrGqYZC9w9p3Ro",md: "WdMi9fMWHZ1jjL0N8636GMJtUuToWFCmrONGum0c_9E-1739797439-1.2.1.1-Y01mSjxgw9H1HlaDkwZIaljzGODvgFjAi9J7pcticwqVo2ThsMilYBZkRFAd0qg2G9YwM9HlID.DujfFOt5yJjAbDbVCWNRZbdsF1kyDOo43q4RKpfBgckvOOvPlK92vr051Mudi6kgx9JWqR._6mVrLTh4ZCZok_cb_1XygaTsyZHHxY1.xXtugKbTAhl0d.cJk_n4K4.zL9XYb_Hj4yzCI1xEtcC7HiTx76OPTv5I0d0zr8OYkyxs7bNNc0bM59IxrmtqMJOoQujA6gmuxcPA8G8ZTiQNEBNl2FpnmCe.CA6OEvWh5yCMjCp9T6cqVdUDJSp2doHeRJRGTlWW9IGOoWo278WdK8eIc2_iQW2Dz0ssRH0DwOanLZlUrcT5ut4ruUL3b3AdUBjj6x5xobAWPJ2ZlZ06R2U9ysSHfsrs.WCIrBjYazds3bhCDGZ74zV8dEPdSMptN6pozoJJorYiqbvd0MuBzzTJ0xWU70DjbV8icmuSKDZLC0CzcIecJyvy03JTjpgIr546I0R6jKqUcw5MSJWpjLuidtm9A.IVIWjxLN_wI1squyCPBJsGdFJT7EUvMEXVqpbH30.dTjPh3Fd10MkFL8mPUc3zCaOXDw1SzmmQFSBQIz7GDTEoLmEV7sfa8pDVUywQVYbtSlMrGDJNvAyWOFtWNLEtDguS7bhnPNflg7JPFQCv3mUDFoaux4V5_lNXwsgQc0e3jcwe5EP.s20G5MC_R8WqSWRQ.cqXQ5Kp0HxvYp4ZTc5UBvLl02nrFR5xJBh7fi2YyrBzoQavBCNHqwLzCzBapCUJD4zSW3YZ1tSOE.b67EiWoMImY_9rKmwWM1ihgCobN4jTmaDFd5y2RmhSKrlwYN2nufImL7jyEzvyI6QgjKjTa_1N6_5TqC7h6B_wFNBmYhCuZjhtl81k7qNhZnCWWTsVRVoEC8ETnPbIoCn6v5Nqzxj3NR5BZ1f0PYC1YEAcnJZ.kZRi.Tbd0VmlzqsII1n5BNLLfSFwd9AUfe9RzAKATI1OI4Amz378hfbs_9dHRIg.phYHUKXtINl69NVZutbREBjXUIAsAlZxXa70o_0u7.EGnBzWjjY7T0JQdlbFC9yMREWlQbJu9bOCLJlWyn50KczS9lP74xJxNazGiEvnDCOIdRpoMFr1cXG2.t0wA2gv4WbryeOrDZ0wvXUCiWPDewsgCkij9pgmQ8DF5Y2AOYD299pJDzMn.abvrGZ.zFHXg3ziQCWQtFJMTKEVY7HTu4EDJcjyZRg9dLStASrkkuRF5DfoVkIvyUUzMC9vJy_G7DSIWqs0OeZCsq1rH0Gfe_heVfSRzUgtHm94.eNyYhlPu929Lz0oF2Z0uZykp.4cS9.IXUS6SRPne5OHY.G2ltrYOBv4GbuWpRYnjHvVoH.QQMEaCSPAae4WkcHGP.CtypQIQSAoG5JI3ayKbC5.rwg0465xdUDQeWNGfrzanhB52Ezmsvj0akaD7E27VAkyDw3tSdV7PKq4D5M6FYfuxuWPorktyG78iaYMslq6ug9YV3RLh2A.YWJFeVhOsYqVpMf56S0EBNmUamyvpjpszYG0HfQlp.VGMGrJoPs_2CpKtOECWqULc7qGu9Ibr1xMh2XRAZTfMpgA.9F8qhhBFidmsRQ.xoywxg7xYEKPykmRSbZ3l6prIXVg9QWrwiCHVzV4r0m14JJJkTAsRhQWlsyKRpw3W725D54yaJKBMbYZpMTBHH2N3loJ_stwybiAxBQyyeUUMxRUKhAgi71.ruwM2nfIEV5oNU8bfMxlMrcRxX3.ovHSZ2GkIMkfKLBcHvycAFFLuQZcQ7XCI3xcGsRUVhtLgP6SsFgoPCEkyMJpmjVX9e0rppqJfypy8BA",mdrd: "EyGTMN.WD4qupNbJ6zml3yvbFfseG8fo.cuy.RMhJjY-1739797439-1.2.1.1-E0ffy2NX6jeJDMOPJvCtlaaBl_s._qi6TGcFG6zMzOy2AD22zOPyoVazO8e.2rp9dZpRXzk3upzyLuRY1AFMd96RuS36fazGZL8aUEWs4XHoZPoXZ5Ti9GFaFWiEM0TxGu1xS_YCzq8poZuwWXPx1BhYgsbm8hTQ480dJX.wlpbHzvKHfUI11iI2zDrB9XZp0gTC8vE4zdMrdB.fdZAGc4tJlcz.Xtx7MnZv66CoUk1s10N5DVlTmBWxFF8cmc4dY2cWkszv67uL9ClD41vxBES_BAmKeUg49D4Ieih2Xi9eoyTih5opmSCgcnPoxqHLIra0XOMfpvQP1Mn8Esstjd8AFecmts143kyLBCb2MRK0xocNFtlY5svGOGCMNTapUIiaU642at6zPXnbppbGsooQ31ovGKvWR5aer262WfPJxP8_U9tr.xHzi_bR9VrIrsd.8d0jQUsMrrg7v0hjYpFmHRP4yv1.E6oHf.JQL.8e0CYZ_jyJ..wWq1Utm.x_qZmFM0uviXNfbK5cm3O9bLaMhI4v0uHj2lpEHgIHaDwb.9xObZk_7VKlIYZ1QUi87Po3iUwVroYbV_dyCfivIa15PMnaFfELLIStwyBdqhYb.PAtxqlHkf.Iirx95HO.bk3QcuLLBDD.R4xZMQkljTTouSDfMyYsrBo_KCLn7HJm3fyjMxEHsX_Nh0IMr2QdxeRPfYFfksqiVSYmVrLmTGShAEtuO8MeJR1Cm2Ck_77_Pslix3zC03.ze.Nn5U2ljmyqPp_xyjDymfWY.w.HuOnPnD0WA0FakP0Qs4lQNi1.FfweJKwf7IeFi_QdtJJ0NAkoWTIV9XsaOINLp3285TK3SlEPGDyoFh3Ntplx6BFvHzTT1_hHMU4F_tgDc1YO2cOtLdisDkoc0ydZP2EJqXdQYBLMy2QDiOV.S5KLQFjR6YsuTsZfjlo5rszVWM.Vu_M3WscJ7dNIJVWanaeugHQHS3mWYn3YucNaEt2.NmSgUv2tNufZ99u0KGtC8N.3Rqun89vOOvTeBW_BC88isObvMY5LTjn4OLP4hOq_utE4TOjvx5y02HpPg.upj_pZxncwNKlhMVS6hTkrezs5TlEum_vga87Sq08SyfeTLbkhP5uAcSPDnGdAFscrZxJyXr27Y_Axylw6RjYFojeV0OiT34qf9J7pU6e3ZTQRQM.fGKVeiSvmF2DLmQBL3ABHnjUdDmfbp3abjGPOnHTfLBB_JbdzmOBhgsB2cjQ.AFs0kNu9beZJy8zaE6uRfazrh7pqQ2QuDCTqYe_6RJ7DpuQ6C9G63wG7AlrcseMUquC69x3yiPOQ1LHVsr4iakPdZ6TWe.xOngxBrT4jPYSewAFFiXlEu1zyvApCyhvvGNTDGxJzr5cFbEl4DUCD3fbQqT8O6XB_WK3jmz6wMTReJ4PFLeW5j_80Rm60eMatD6gZKsGwA0dfoMC.XmeCMgVMofAOv60hs4CVHaPFsaqyUQE2TATdKPavqtYtlpHTT1_tAw.hb4lrKlIcNc1t9f1dNWL8F_7bgc6YdARGMawhP385mQP70BltoIOCyK7nfw5EVwMIznfpmVlfrwtZN8riBU_bTiaqm3JxZv_2lBc4CqtF3VXhEa8Cy9fFa_zDZp8jRT.6C3RbgAuCdvB3tfSPb10ExX9T8kjtTxP5wqfC7aZGFLaV_JO6fiF9lQfX9X9WeZimQF4Zt8HXrXI1bwxrxMuA06D.4ezxmH0P1sc0kobUdHWe9PUAAqTCMBGQb9VJyAT32ktinsTjqp7aY6nKXVi51kFu48TydhBFcZW1iD9wWshtxWJK398ArH4L4p1HcSSOEuA5vNcjUu9mWPfgZPwo_3wc7oC3LHFaDPrcRMWwbwNwxZoyfK36EGj4MvNj9VffHO2jLIuB1YYy34q5mGD5oSCqo_qjgbzSos565Ufti9H0f7CwBNdAvltAuidXADPfKo1m86PiX9XzXxW_"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9135fb0daec740dd';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, "\/5889\/xml?__cf_chl_rt_tk=CnV2Pe0XEN36WIHFbSQGhifHmwW1WLBX0VS3._YGvY8-1739797439-1.0.1.1-XSAtlg3yhc.FCEG1OqzPTF2RlbKabXrGqYZC9w9p3Ro" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>