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: '91341b10bd96fd93',cH: 'Xz4EXGh.svHNnvJUkrDIZGo5agug1hlvUF8hDFhBYD0-1739777779-1.2.1.1-9i20p0QQMmKS0jDzTijacjrgrTQ0057TCEgD8n5bO.YUzeN0JJ1DIriBwsq4dhKA',cUPMDTk: "\/2632\/json?__cf_chl_tk=YfIxVCtAXpwz3uroz7Xt3KdGriBGQ6KfeSA0l7eKl.0-1739777779-1.0.1.1-YsU2GKti3lPeOplJSLo4edd9B5I62_DSb.f5yapU0k8",cFPWv: 'b',cITimeS: '1739777779',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/2632\/json?__cf_chl_f_tk=YfIxVCtAXpwz3uroz7Xt3KdGriBGQ6KfeSA0l7eKl.0-1739777779-1.0.1.1-YsU2GKti3lPeOplJSLo4edd9B5I62_DSb.f5yapU0k8",md: "XXC3WvDSiYEZQxAv88tVsB4GxhXCLrpLO1WBhgASG44-1739777779-1.2.1.1-HgpxGydbI02u85tsTRb9As0As1NwCcCMs2gNouWvz6e_gHy.wgA8LQzz_VIZtMOllb5pNWxVjoEesTM1fzY1hKIRu3WWnHQaFFf86ttYHpGgVeXDReaCi_V6V9PDuS7DOKlkSN0cJlRcVIjZhIsioMN7qhZCrHj_9p5hGYjjmmPDDP14izPtKQAIygiubBzp548IuTDFKreX2mmZX4EXYwhWsoveVEVJyh_hXIqk_Y3WGv4L3JTwoKeruRwOYyMWwnYVTIdHYmgIK_1_p7gaNIaA2YElKX0C84e9bGKBC04_InLJt2A9D_bLfqL3wrmPwCVIfG.0AHd.ohhUts9fhHiShNsxO8U4QuCOqnF50hGnzkd8_u2LzZQ9n7Atj58pP1zQm7jzbG6LYQF0ckkahxb3ScY.jTUqhNwLL5A8hccT2aKK00HI4rKsng892jJ0FN2i2RhBDEojLZUecP3sjBVs5_HSqrGHJuxAuNTIsx87dOApNUexi7Cy7xI4VenyNl_yKksBsqz_8k4LxkuQJHxQqPdA7HkJ3eEjVIIGERZ7M_0l7ecRD2rn9kfudjcFImLNdpQNQBISsPuMK0G22jPKYZxcrl_BTpbwxPpM2bHOobIE0tznuJSCcf1r_HqwamdZl86e6U0a_DbCF7kduGgpKYRCZO2wAjvLvpImjElmXFLQXFr4ynP0Lh08j5VEqLpUKtNUR.z.YMCpp_6T88OfcZz9FYu_AY_7my3bZdV1nkq1yHt76tFBk1cSrd1D__AK3owdk3snv2EnalNU2MyxxKEHwP8ZoeFw1RMaxwH9Vce2WyOVG.3DJZez6X85RgO1VrrmrDFL2sDsA1GbW5bw0g5YjLqX_DjU4zbz8cnQBXiB3GrxdXLowH86J0Wrm8EVIDhw.f0d.8b9H1hJHuHoqz8IvXKUqEjWrnvbjLL7Sy_9.LCvtdnstpCWEcSnKvNv2iJHcAqVaAERq.UNDTsYlr.87IpDqM.28qq.nEkd5srq4QD7H5GSWkhwRViEJAS6KYV7HKoUFj93KLhe.6izS1Zxpn6ccBu76SKMqMcpvuuwdti8Vm62IDLOUvbnrQ.2cS8VSbpqvSBPQQnH3X6j9y2nvaqdCNFlsW9kVxKvGPQjmi3JpRSazAbrMb1fj2NkKEz06Y5vpwjyclKwUlQimIc37gLLiuSrFEdn.V4zFHyHeQdrV5Z9xLr9CS53OQ4jpItMiJL72H4SEtGJw1quyVKkGsTN7cedWiBgA.Md9cO_etOJxsz0gQ_99qnboopIT7ne1e7Sl_UgSwycs2jbm6e3Jl7yb4dTpEBRTpYAd.BbeuAf2psx0dyfNqfs8vhMhKZjQ6KHDow7GSZipZJF7cd7_3DkNtC3_L2J2uVndsMhK8tTlGG04aYHhlcne8luc1Gpwc0RvAeqEx7DGd_larIX.gSEfThZcTRI2H7JXCPsX_Ge0gRKQiSGecdXcOxUODmqwSEU8srGF4HgltVbnBdzKEiMVyT5EJ88t._4SE3vsTypCmlJ1GbmW1GWorZ_SXTU_DwwO0kSacy2K_K58LxMFFyHdw6T9sZbCrxLRcsHbTNfw.Y5J2_mRyag3cc.ysPNfGz_jpwkgZiMwMQH8eYLVWUt2yV8XX5_boY7RWSFkWiFy46_UrMd1pMWxcqaUfz7uViOLBAWuaqVTbUZxkaLrF84GFvrCtFoONo.8BkP3SvFemjJSqai8dphht5nRNJvo35dMdEc5pwW_ydCihGoIbZrhLcy57W.4b12uAkECI9PMegIlwTgXWO_xhUDUHDyt_SGxfGWxrS68vESS_XuT.7WQDhYGRE7WqeBPpiUm15HX_QZZ25K96NS90fGWP3itSlGiLMOzk8SycBfBVOjK.aAM3RENvV3Lt4",mdrd: "wlm0FGMb4OfDcW9rtfHwEnRHwgmRRSkDtzLR16tg.48-1739777779-1.2.1.1-DOM9JfiJzXG73QPGoTecrQmzX8s_BOlIxVJk8_K7rqr1pLcUGYb_6NTtfA9TCdRdqxao3JCnhfKJGk6jazsA5X7Ilku92fjDImYaZ.h8fgQuQzUvC.679N6y5F7ECd.tbphAS0xF6nHv.LuZF66L3GbV.3BjvOI1fb.xMDkkT5lxcV1i88izaFCiwwnGeYsfCSbQjKuLbJFlzGXpccHtjpvtQxVyzEyk_bC5pXujDOc4OwDm08oo2W_NMmDTq33hGEeZZ6nT4FQUGDXiUQUpd31kreaJLimVHm1QLo0sGliLCXD5t.IQnsFhGCARNfHCoO9QUBPIDiFfSuH2ogSyJAJDNXwOVK2DfGcuVaUx8nadVCQ8vAcV96vo_jOBHKtXuQa3_L_rq6w7hYK1KGJhN97ITvObDjTDvaK6lzMK49DX1rGaEX7KLBCXfHopdlWBPkUADj2KbDFeMxyC44FJgd.nBBD7qOIJ6xOUoRQj5DLEh37cvxICtOBU4k45hCsAx4G7f6uUXnS5yjEPJ9O3Omy6Bi53oihViIFfIcIaoH4we7HL_KIoF3fs2zvL5PNN5XzlDmzRfiRv0yAyvDA2ugQ4Quupcc678hDSJ5TlrbXKjnvD2YnNQgTpYY9g4pOo7VnzHTzBWpG_pPyq5KtUocaQkZx8QwAlLSBar2G8mV_9pt0F.qVGMldB1zZsTyV4sTPGFUUV2OrzuL5OETMInmD0s9XxOVwV9On5XxxFb0HfaKQ5jS4Br6CiABpyHFQC0OixTox4D6zU4Gf_bTzY3eK9tBbiGmkl4Za0YR8YcMtSjKqyKNZ0CykZCDsHum2cEQKRY_pkcrNas1xXU29vXghpxKt0oA0y45ieZxGL0uM3s6JiFqTnEBHY5KW2CpJ9qbhB7ply8A62pevs5MBVRp7h9VagPx8qbCPno4oLd9o4JmRYKYp3hIMKvOJqU8_1MUiHpprl4z8XAlkoAy43hsVBcTiNMpU2hlXrFrnMR8I85ZZX4.wMPU0nAgKkVzU7Pm2MdaJdAdEmXuAvRjXEg_rrrUWObi1stTz5e_J5DcvI5sNbBekd2G3L9aozgt6tvsVv0oz__mCA41NEoDzGjAvY9nzIGipzBj0KCd_eBmx2_EwVIVlKtGKZWDL8DrfdllemSNvnoYqrR.hsqn.A2Svr8Ikh2BpoLRPfg3x101lAtctvot8.0puWb2rXPtg2oZaxvxMcGl7jLX9PCgqjJQ8JCtkb7NYUM1_DfvL1kvkhdHArP1O0NbQ4iwqSrN_mxo7556iBta6h0R6JjLpx.JuRjE0VK1wrh9Wy0el_n0D2OzSeXlijk6ffyehV2uhr1gAAGulxFKAaCYVHe_fT34iA1xEsOltQ66xMTDiKcpv.Jxbax1XcEWmzPAKiFtl8JMtAWmTxEiTdGXin1NEq2wWv8UUsyDT_.OAV4hJnBjcKp9DbFZ2t2sRTRWZ3RkOtVNJ8XHSfIFYzcNcHNzhJICRx7_Xj5qxaRkihFWLyGIm6end9vyzPYt0YLZ_.yJoIwsrbw9nBbcTMitnuzTwKgM7LyjPOrhHzxHGixBrg5BWe3YNNcDObl1QjgblbeHWJfpc.rkJvHUI0hYuJl5GQsmutloPfk1BH17Wf15a9d_U7Yc5hTkB8udqKbZXkemAuALdh4E25QCFni_DVOM2jyKY9MZUUbrjIsble35l8KDbrKbPfWGPg9EHxmNJ57C2jrPkc1vV_yM69doACF0DcNjbgDrLn3xJCcq.cnNr3GZ3SqBKO3VRlkPs98r18TlbVB3.s.WKlciO7wRRk3tivjkErTOmStUofGxTGHXkyUlOkqsSqloZEy6I5WGlZv0yYXatGM3w8hoP_gE5hN4XFEBlnuyWZ5jdCGkOVxrnJajolGS6YtMuWfi.pwkR4_Mk9af7WCgCtGYoFNcV.CTMm1jDMDSlq01s36.gSgjrPpop.YN4QrVHcWAv19dbW5D5QOy5pQtkuyuGK0XLIIcAE.w"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91341b10bd96fd93';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, "\/2632\/json?__cf_chl_rt_tk=YfIxVCtAXpwz3uroz7Xt3KdGriBGQ6KfeSA0l7eKl.0-1739777779-1.0.1.1-YsU2GKti3lPeOplJSLo4edd9B5I62_DSb.f5yapU0k8" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>