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,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: '9135698a3d38fd93',cH: 'LfbIZzBLe7bYb8O6gbgnmDbhL7hvljcFBO6MRtW0zgw-1739791479-1.2.1.1-pMSmuu8s3DSXuilsDZkmk2bjk06PEh2Pnl3WdreZW.5B62DF7nw.X6W52pKTD3kI',cUPMDTk: "\/4507.pdf?__cf_chl_tk=WNZOBfTQ1QXLiwvEN5CCYEUq5w.7krYVVJ_mFl0qetY-1739791479-1.0.1.1-8vnU2WceHISnB4MdRtLKkBroFNlVQ77.qOEwpuQn2Lc",cFPWv: 'b',cITimeS: '1739791479',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/4507.pdf?__cf_chl_f_tk=WNZOBfTQ1QXLiwvEN5CCYEUq5w.7krYVVJ_mFl0qetY-1739791479-1.0.1.1-8vnU2WceHISnB4MdRtLKkBroFNlVQ77.qOEwpuQn2Lc",md: "aoGyqHJW.ajsAodIAHMnXpnrurEhyy.sUiOgDpJsbd0-1739791479-1.2.1.1-0HPpy3pAbG2xcjCVNBthUIbHRkFdUc3JaK7URrteCVFkjgYmsXFC.NzyEEME.41QG6a7xO37xBQjzPI8B0Wrx0eYtA_y3HNl_EJl37u.7GW7T8i22J.ENDyinoooFjvJPLI6BLclqlUkb68s_fugQJjau3yXPMIQaqE3fcvVbYQnGHi.Mj87riiBcggpAt.ydNr3G1ID0bGMmZFCUBnF7ODaMmJ_ocHgo1Y.DkCmKzf8i7fnw136m2nnwPnSD32BQ4I1O6.4aBwcLtv7U7um2pwsFEEgut464QtpGd1ORtqS2ibUZEB3Y.xKuE6DVOcyjQq47iOH8342zC.LW_Ol.utwjxOz_P4_hAj_mhHN7Iu9ADkyMQ29_BK.pnwxquWtmPa9kweo5Y4Vrx_v5TcIKu0h.t_gEfsTiAZVnxbqL_le5mkCS60fOwJRAY1dvxe6ul0FEZSTlu3Z8DcYRrSHaIffA7lFaHDNX8RE2W2NO5pSdHcdyr28zeFdcCrU9QfgozauG5W5F3Tbg3ZiJtdSVVywlFA8ofqI_ydFq6KD8rT2ZU0hXtMpd5Huv9r3KJ03XKPixate_WFPjpZCRcAI6kHuFCX0c0RMZx9r2Jc5_iUy.PlR9s3JCW38pS8Fod5mJGKA3C30cfKZdnvykQ4M_aBkOc8S5QDJAcP6Y_3u90u8.puD0eKdsQ9hT07Q7wLQywEcLrFSHr72WkNuTYoTTVUEEVplW452PsgZaReeuTGaja8ckr6qbufDZGn7UQ.IX_lgvYeAHPBUGqopb.F.U5nZUggLA21hAJPHL2q2F0AaIdaK2CfSYMAwoWtv5g9F7XrB9jLIB7QE7lOhmzK2g_aBar5WmBkNI9r1z5dvjXICsa_m9C0uWG8vhEdpKdisdyVbXtF2ca6F.z5Xi7cc_nZib4V3DOFQSAN9MCGrTvJeT473Hmrf0BMoo_bLGfz1HcRp.jlVyDMsvUACogSpoYJgJfFGQOxrX9Mfoe_GiWkzuMInUUfPqTqSxGEXMD453slr3VFlm0vhECo2jjtXNWHil9y3dDaqNSkoG6U7Z8UNxSwdwTH3vZHR6kwN18Rd0mM9Lxy0mmfGrA9omCuk5nuKpo9HZE5iWvQt_YmjPNgLEX3HQmKdzyWzTE.cpvy0d8QcQuxa__8feRm_SEFbECenstsgBrC4fLqDGtZrXRNmCGPjbLf2Vqv4W4vIVw6hHn7zHtSEZHvsyK6OkbkVXydzbMDnc1o1OSHOcfXtbork_s6IfOvItVjMkt.svkozn7zw69vAP.nhLlAZSj6mVx1ojS722wEo9kpF1y3rKZ6rq5AT_gYPrkUcy.LeWe47DFiZk2VwJjE7W8JdpsSFkYjK8UZho5z7cCaRvHDHcCJxPWGMucPAN_Dzrlb8PdtNO5amYUvFoatrBDcVqjb12JonPH_mDV2mq.L4VJv5lhjQNjppaAYV9cpuw_9EvIzLxQL4ESLcBY_CzDRc4AuUn46MtILyT1chpiz2ZhwUYT605u4wbYm0kpOov84hI7G1oGV44snHcDCcovZg_g.ZFUBnGtKkRb5W8tbK5AQwmcbwYtXWQ7tJXuohkScdo31CGXWFJ4z.jKD4A3.wJDWtSgG_rxCpQfj615RdWeil9ebu29ps.JGE0rza1n658r1phCZYdwVSeJjIq2SGPXGTgl3O6beDGFsF0t08YLx1jV4T0B8h9bXD3LL6.4Qob0K7VN4O9Az2ByWuWKVkC6p1xegLqd04DBUbfpT2w02TvdlNNC.6SSoJQe.DUX5KODOtTs5v9agO7u9CbVWymhVKIq6n.5cC1JqVGZqJ8R3dVfIHWWBABZ5roAAMuRd4gqlb4nKa3V.RhDarxCl36P.F9A",mdrd: "lhYM8x6JpzoE3Mk6WU3Cfa3WaSB1tryTq7D2EGZqEw8-1739791479-1.2.1.1-EwZV1ZBx4ZEonVBa8drUHmcpaidLtSS6QTJx2vryPeoRXg28i7rB.xUrsZo3.4lQCMuNqC7Jcr2aVSW6B69I2i7G4k3H2P_DTIue9hSlpPYSjowyDDmP1h7v473dVd_pTW.KAJZwzwSCIEwNY9Numrvt5iY4vJPWu_lgKUZ2z4dP.NovhG.akb7ZMKGv6RO8fz.3gUOLNGWSR6l0cn3Bv7U7G5aMYDeXlreZq93AK7zStZ7n5VDOq4FSlnibR9ghqlJE9RHzhnRnY8QeHZDTzrrV2MztTq40.07NVMpjqjBH35oXDN5zW0NcBWrgjUh_gWNw_5uTwXv4AiITjWbj78o02rVx5SELUvIaCdr4tIoAf3KJh45BeU9Yzco1GWGNo5CpbcYYqFVufwE1UISlYzyj_KjifPqRDiZKNvgUxPatq8ix9THmZPu4vZELy2Thlr.dhthKoY844t.q40izscwZY17Nzg622hjlblb11Iyi4sfDfHQWiWDC8g40PLCoWXNL8Bk7wJZt6hsjRxNcQsPBO0O4yz1KMLo2DZs.jbqEhvsNANnxkmafHHSwtC3OyNIYt3FyExwYiry3z5tqsfCgo_75Bg8VrpelFLzS7w1kM1cPiYtRytRQYdUXQbdirGZ.PBZHOOP_WX9WjefsGLRoWQRRMLCVxQwsbsSymG7cQBlAsUosRGf0fYp5m965.xWG8jU4tU3waH1J2VGf9Oe.5N8aO8rjkoxrLuVcHdlsGbL1e77pGZgkTVPEs.i1bpaAfpV2JJBtiJeamytfTXhFTmxJ91oufLYqEJ_q28pFYy7JSiLu69zOymLoAQ_M.zD3e4pIDgCbV3f7jKAVQ0yGFBB.nkx9kd1TT95h_c0nrikSg1Nit5IruOR1Lf.r2awtAj2ZGTbpM1eo5Ik662hmy7z0iqQgQUpl8VyEwn3F7JfKdu2iGdNjUbeJ2RG_Fb8UMti2SHARXLs3313luClgk35MayMxJbOnftprwe3ZO8vYY5AqlISfIKy1QuFA14gsQs4KOv5JTuE5UninynY2N983SjAP.kSRnhSy3CsBX.w4RsnOn9CLbAbNHNZY_drzk_MQfEI0rtQtV.KkBD3l6USXOOQjW22RCYBrWcTlYLLT7_YT0dWOTkUMcc24EiwFpmlwGSuHWvGQAWpQ8GEJVTBI_6cOrLNchQRUJKI_6wn1sFcqK.Exc8hks60SAe68yokbH7eL_FPHo4xHLrrKku1iR0gqIEYhtcr23YH71HYc_KcJxmkp0BHfNf7xSOqkkABMcjBSSM9o.GDgfthzSeMJKJGyuoXBfWY8RgkEL5c6Ir41PEiR_yqzhyIJD7Alk8TNJYFbGca5SeGgPqtuojwPQmn5txAJKvRyVcJY4bVKXOvwh0KZqcSgGq2L3_T9FSj8VIDn0g035arVqEpXHfzK5F1d1JPCK5B_oam8O8yh1pnz5mR2Bt4VgiiDC5Vyhe8.O0yDYDhf1FnwNRM1R9IMK83v_H.00yY1HGHg7zu7c0qRhOCjZnJJ0sVoCxlSslSLNYHFqyCSXR0vNMUoZqNm8aV7KDlIHWs_gM8KykNEM32_RCOI__hb6nFQkpjoSAiNiZ6hFceF5ObC9a8b.3JHEW8Hg0.bY26HBy31aNd9BCnZ4srBKa4LxXTojEBLuo8ccqO_ZNTu91bA.nDBPYLzBYdMKhNcWCsB_hrgDTdvnGBb07iajDinkXxMrdZBdepW_C3qKxys7f1DSlBYM9NoC_IqQljVqNQEGx.1qZ_4ALAEqguyhm_NjQDLDYtDsyoFrg8Yr6gQs169k06tRrx7ywGhMQKnheD16T2DbXHqX_T4PwT9x2vw8CXLVPzMFyA.ywl2VpFXsnuNIVuBa4DhGOPGEymbJrETJdH_qr7psFFfowoHfOkLB11YVGOqIC2Oiv5Kl7PLA4Xz97EQxkdEzRlX8o3OxuYEdBVYmCkaIdgL3qRMHWjawzRMgtOHo8iJVKbrN91ndo42RA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9135698a3d38fd93';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, "\/4507.pdf?__cf_chl_rt_tk=WNZOBfTQ1QXLiwvEN5CCYEUq5w.7krYVVJ_mFl0qetY-1739791479-1.0.1.1-8vnU2WceHISnB4MdRtLKkBroFNlVQ77.qOEwpuQn2Lc" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>