CINXE.COM

<!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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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: '91350ed04e97fd96',cH: 'ykFI8MoCGelxkOEZjV.YXdwk0.vLTO6U2qyqIpNPvFA-1739787763-1.2.1.1-mHLBnHPXTI3.98ESolYuCXQtcRXewo1MsZRvkHTGxhEMNR0_Yqao6QaJgGusfDe.',cUPMDTk: "\/17205.pdf?__cf_chl_tk=BSX3VmNzYX8PDKzuIlW69UsEOJ5z6MXDXeQ72UHJ_cw-1739787763-1.0.1.1-ogK23cYve7mmwlRyXOUwG2BgeH3Mpd_k3WikwASKGDE",cFPWv: 'b',cITimeS: '1739787763',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/17205.pdf?__cf_chl_f_tk=BSX3VmNzYX8PDKzuIlW69UsEOJ5z6MXDXeQ72UHJ_cw-1739787763-1.0.1.1-ogK23cYve7mmwlRyXOUwG2BgeH3Mpd_k3WikwASKGDE",md: "AeXzgkqiQIl4jW.r0CSqX9tjsEbJxwOJJz1Tsp2QFrM-1739787763-1.2.1.1-f0nGbgI..pesmjtZ7BaPAKxoaWIbLrRwdQhPEIDVOs9msjwsFSHRVd9HvLrnAAL7XmhUO7T.XlgfTCSKm6TTWT7XRluPLJKqKgCzsqRlq1oIPRPh3dF.EyrTvKGZI7_4PJopffd4xMIc8QZb5wacIZp41t1BeOlIR4ql2q3_VpkXEA85BgoeG1F63Num065Y6_ITaWM9q.dEdXgp3SfRMF1mMpo0lGsKdXbsGgMoCXCiSrOWjQkRRhG0P2eu2UhioT9OHCatc0vHKaqEnltQisNscSrDwEbqf_.H8e3461.cQXuojxSLJ3OrfyPrEJKt63jCnTnzQ3XL98jGISfHTzLP.vI9uMIt5AxyByyxa2SSbGRHj6iHuVl_UxcZQJomELm4sNOjlCniPaqd_fVaonw5CXqR6WgiTTWBnUPo1Sh_jt6kktf38odFOeV0byDnCoi8zCmbUoGN8idatk997YvF_857zDp4K9M4BKkZautOaexoWS1m5X5Qg45nb0yTNjfXYR.bwp6Dv48NLO9vrVAyG06dFVnwnIyJBcl6__IDu2XtJN5TOrv.oQ1DPFi0CjP5lSmLcmGcrccwsQx5rSShaRFQDhHxL7kMV6dFXZjiQDUrv.uIGMTZVcio966fr.fG2jQMMjiXA9am1F4.xDkjES7YUOMk5MgwTdmjjQxCtQFPyXdORQ8JWSyWyzaheyIOYwZ9bDJcm.ia_IZ798x5uG2G_gR.Grg28rV9B9OfRt1munPiiVSxO5zq1e.Kp2xOVBvBXcFi07Veeah.7p8f9XfiAVFn0T.GD3DaHhLc4M1D9O_4Yije3HW5UDvHRXQGQnLNp66TDv.gcnTbfXL.5EXwcrFpv_yaqtUFYj_4ylHoEKpMXfCr9vBK2mht1TLEpSz8Qbj_l_JYNHHpyrnJNs7D9yzLVVZ.dGR.je1ovx0oJjh..R3QJ0X159qK_CgGahtOaOM_7LXaMT.6v5u3nWrao45h84x4Hlhgi01zAgX56xBjpCDuwxS2biUTpn7owXQtZ3XlIjiVXPQ_kxKtDx31ZtpZNpuZX_wqoMooa8aCNfJfyg9KEj4hIuzeAur2Ios5TvWfpTp2rLlpRYJ72VVCJhl7ZZUkWnoMKfrT2amSdTpvlLMtrsBIvBvjIid2HH30PFLuDrWD2FuvWcbf3o5egXbOsJk2rwHYWl.lv.D.9TQqnxufG0UmTIp0uboBUutFdpCsDc.W7I6Ln92RXwkIHxDkUkoop2aWvoPxgLq70nuzDwCwgRichO0lIwhnsC6xOkWfVwnlPUEeoB7doy8vM5s12.K51Ga6Zx4h9edUVTCxqzOKbtLcPIa3NanJ9x_vnBR2ZaguqZTZFfkem4K3FD7NSKrDMb.Za3aeAK6gr.DXFMXEqB5KtZCjZ_QZNBB9LSnByIQxBfc5oSl.cw7Pn0LIzK084t5SxAA0S9HcQYqwL.RWqmBuAKfR8sK9.8X4tjtJqW8OqbQiRN8MGJwq_p6RKuK0ZniK.zLuS8hfFgqtaThmLFcbtf5jrokQa5LkWo66_XfeGZYsaoGjdwfgVPZys20NLa1HPiCq67V2tRZSwep61kVLCs90GfivZusAGkqMGBN_imkMI08E44rMMIZ3IcgFMvfFJf76fFT5TR_66ItebH77bv4YBDPXDsubT0jLmVuv2m2wdkSvVK0dvIOz9VNoS6FlVJKiygK3446IIt3I7VHnD2aWvjIQlTOOlE7YD3oZbaQGv79uAyT_Dh5vGet9dMGqdKyJpyXUa0CfZP5lGs9CqgKLNZOZCR3NFg2llD90Q01m7WJS745gpVAEi.gxwwxgM1AsQFYV3q.m_KoPMZNoF7kLGUPd35eRvhttr9aFXmeMtMV5Iiz9h4Quv3YzQe9Js_U",mdrd: "i2.m612egNxKnVb.sWs3bCPHvIGEAALeTOg5MhLgU7w-1739787763-1.2.1.1-2OKaQBVW2P6bxi7mG4xetiK0FIPxWWTDwUVTdSCk7Zd.PK1lxBeqQPtd2LaqLZTUgZF_x8jpGuC8bauY.22NYpkkUf9dR7nzb8JXbeAz.OMz_eFRlNvDY43jOx.fn4H_Nu6fls_BBCNIjrNrWKzU7e4KKWka_t6noNmUuJq7VBjWPYluVibZD2lX14z7wxuZS8qmcBKr.fzcnFuCQStleNOEoFSrwJxOnlE6.ccS__O4QQxX5LgskhO2RTJLuj6buC8hajNG1shcDtGaqT3_QdeOLCcl65ZawGimkFK9FjXmznmefU3ZDlrOPg1x3hhCqpnS3KsY06JNw3utVlAJV40XrImDYOaUWRDHVaSCKgA.XILCIGvuf3OThVpoGSxpD0nsZ1mlHdRzcxuHx.G5oTGUmoGA4lbG.vJ6U4iGvPYeFucBR0S4LwYTLCJYCMqcNE73RvYNP3EHCdLGOdanDtmfxoo3qmXpkw.S5UTGPlM0lK19eK.GM5o4d5SmTc57d0Z36KGrBdGSPQsB3llscchvSLJHNsjt6GfLPUigUi5WmpzQ8PF9WpK8GfVLuQ2rVZWPVbIdXzvI4fi8i6brTM1HP21VHezzpghE.s7_ue_fefhVF.0hGZ5z.9Y_MWQz2jcFkME9m3YC9Yad3WzsY6PZiwV1H8fCIvoCaz9600ZrRndHlyNz0YrzFqPTmgBbsNkODpEg2LsA5c79_y7IeL3uwTnQTHyk7VxroUJkeLXI0d.T1EZycrwfna4vgq4Kg17yhtZsBMmLNQB5Zja.9EYdMM3MNBXXlfjRegyMT067TBrXERTe1zlYE7OE8wM_MLJ4s3hvx8U.FeDroD.7MrGvVKIsxX.o0JfeX3yxgS4sUbPDn4X7z9tnorVM4B4hNZqkQv6IIxhQwP9C42z5rTLMje.FxldnnhpvHtqTJefxH2Fik.0YniwcvF7u.58Nm0sRxhULVB5ScADWlsgB1ZviWjxVxn0zYtiK_wqGAZjzovcxqNkVMuVs31xDvGSSLFO3.y_yGOEVp6PX3BfsxDiHCnk0HB62e7hkyQ5iBiUdnzjBM23nyvMYtR548mrZD7f62qpb6W.3_ktWIL0vVN6z1LeU6qZjNTbFN8xfxlYuxHMFfxenZkJTaWZSaYaki4rddTUTmX.Cb95IOXA6TRZqLJIpqINwFxxsIwgGHBgPCdO8qvjC6qOYVHiXxGUqzH8WNJeZb751wvs9a._BSFDmRRRgnppHUdgrpzXoqs6Ahtqy6CRDe4jCijuY3xx2IrfV7ryljGLHKe.cctmQDXPoCoXJYrzMA.y8iO32Wlf5eAJXggkpjsOR17x0j5lnhGXCF2Lz21PIprPd.bqKFYzoVvvsz0R8MMmT30kwjxavn17ZlZ9jZIO7iJUoeetq.ELjsrILerQBI4dkwlk5S4TaVRL9k8muCeodhNNQNDr_0l5O3eII0hOqfnmgP9grMqwAcibpnawMl2bTIQnnB2H42WGk6V5jkISpVVQacor_v0u_WovBM8TAv8M0Ie7GhgI9p.xlxB3dSQex9TS5yFP9fbiHg3YhYrom2fbYtC3FVAbxn8HkIJ2J7wZYR7u_mCwS42wN0aBipoMiAZRaME596HtPA_icJXI9m2JcLBQnO22Bw05j7DLpg8e7E5Aqxlrm0PjTCB9lM7rQ5QwpXFgDaGm1gLS0I2iOrZGNjLLWURqFKAxpNeKJN4KVPDJijn8C3JmrigvjfXKjpMIq6fM47wnEN1U8faEnbJmEQzKm7JUgVjsVQD.qRqHwmNFl.WJN.0VEbG9u3eQdDeHlZ7WE6QwokybIDxFy.YgMzlZstSf6QCgFlMnfFA_Ns5wuVNzMM4uGF3tAGSclSm6Jbj9Tqi64RsZmwsbmPfg1AU44LX7A2uZZCfAkVOZt64rssrFmowew8qOpFfbXgLTF1TM_OGT.7OMqL9wze5WZcTpGtPYeivJD2hafqxD0DTJ_"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91350ed04e97fd96';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, "\/17205.pdf?__cf_chl_rt_tk=BSX3VmNzYX8PDKzuIlW69UsEOJ5z6MXDXeQ72UHJ_cw-1739787763-1.0.1.1-ogK23cYve7mmwlRyXOUwG2BgeH3Mpd_k3WikwASKGDE" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>