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: '9135a167bebf9daa',cH: 'nvbERyEhlqEMHNp96Pk96Yf9TPy71YaK0t6WHIQ81xA-1739793767-1.2.1.1-a0ObczBQL2MBWEClLy1aTIT37DjLf1SAKaVABuI0VcY7iwuvpJE4ssimj3sv0Jbo',cUPMDTk: "\/search?q=and%20zone.&__cf_chl_tk=ictve.DsePO6Oxx7Qpena_Fv.j2vFvVOHcr3PJ8G93I-1739793767-1.0.1.1-MyxO9.PWMZTEIybdXCgpWqm_rtcViUeyFIC.PAertDA",cFPWv: 'b',cITimeS: '1739793767',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search?q=and%20zone.&__cf_chl_f_tk=ictve.DsePO6Oxx7Qpena_Fv.j2vFvVOHcr3PJ8G93I-1739793767-1.0.1.1-MyxO9.PWMZTEIybdXCgpWqm_rtcViUeyFIC.PAertDA",md: "lvagBiiqFmXlBBZ0sgJ8AC3fPchFyJf2UKxJQCkWF3I-1739793767-1.2.1.1-r7pehOUOZ_EXP6QhZG__KNcxpmTOJtZ1e1xoevY6UisGAGc3PjtjzvAXnrhLYlBDcu7nd6JGykNwNn9Qt2t66B5lCHljGdlwdUG2itgsAIZATp8hoHsK1cVLuVFtxkr558sytz.AnjfdoCrrnD.DF_Z1B3pskJKT_jvJSqKSjotz_progw5AqPa5tGUYmp4nXRhunMLoWII2yuh6GV2dE3NHkDP9cZ7B_z0sSu0CWKjnJJI.Mrj73qhkTb_R2ifEKlTlN9FyfmwlP4kCDTG7KCSpwf2s05o0rUw1THEClRvvtG3ZcUMi1J5DkkzkAeMoSGdCZyOnKnzvtQODgY_oVzLwMasTuiNPNzR67EiIDtZexbTJancYiEX9A7bkPUmvRQGpy8tobZy_DCGPJ3V5jnZN4MIEkyZI0AQ_WdMWI3Cwm6gpzG4kwNmJZxX2oqoo.oNLxoFNGwHOXT0nklm_bPwKV6ct_FJI9tL01t6NFueix_GEWElZdVHhgEfneOb621uZmdYZ9RufeRtqEXfWGallV1OKbpPM.M0mKmzgk6sYaz2DMJOzaH8rx0YMZTPom4mFTUuT9AV4A9s6QvohNuEd1E_X_NVqGDjjQ3_xIPi8b02pAZdRy02w_tMZdRkreCLgYJWwkroaJ1Aoz6vDQ6aQMrxr.pKH0EqHzJH_0B87N2llX6NVyoJO56uJkEL8wbRKEUwv1H3KBRljHDPKEnNEYl9EgOBI8HeAFYD8bNMntFdoYuWN5YyT6EXWHP5Y26ufpZyeorVM_IGOaQrvVMS.HvhC1J1rqnLqglR1fsqz2njBZJUl.rugpd0099TgMkso8CX9vBK6jb2DRVjM1Bpo0GnfbxTHvf6CvimepG6gJXZlO.aQLbyGkJugjTqaM0DCS1prFT.RmsQSvHKkTaJw9Tzc4jmgVTje3t7xxqHn9umw.9i8UyyX1exsP1yZvHXlVJGyfPe8T3R19uPYdi8u62KlRElQ8wdDmDtoJCv9Ow_zfmp.JBE5PeEIVSzQsx2p1GG4dHd_xje6K6uu0S1f_VPbmTZOioWsoI0Mv6H8kLcER6brd8nWg8BBPfA6P7YBuM15.p4H5KdOkfc2cXg1KGLFAIleyYMg2USZswjSRrEDsR7QiEDdd4b4uqsl4W7b0KSBkw8cX.w9XFCpp1iuwefrectERC8dC3_AzVIETPmYLBF94R82T_M6ZQSSET2cBTLRwWiHrfTY2i1HU4bv2DisSjjsWcmkJGYNC_2MZDKg69UjAS3FmD8XEt0lhEhaSmPt.1tlPI.zrHbHXjhhhcqeTr5PYU9b_IE98jtKPifeK0IiBHoeZdxK3xqWDQ0Tg58sRbvsm4cWZICacBLHuJNtqNzGXx1f5spgRD8MyC0XTEvDoch0XEAy2UW.LvuFaz4eg8PQvdY3RtjaAMcACoucL.6MyX3tU0aq1t9wodBk3j2WvD87.Sv6GsVuq9uW5WJJkueQOFb5TJaVrQ_0_OEzjFvVs0KrNBOXY1imF3eLhHhdUz5S_KIkFs3cAW17_bDlgCtDlqkMkWF3HqsRRatiw2LnKe_t.Y66lE6yOf3IkQKpZE.MuUgrfkxyv_zGgfeI27PUbUk16Y3pBhD5zCWkQx_BMXwZ90ktuaUQr8X6t5lk1c.5nlKpJXonEEctI8gDUg7Hn7ob3coygVrv4olDRlUHmMYPavMuiatrErSXdOMEDd0.qOABIvNa0_f3huqV3WKBN6sSGZCfZAp6gsBCjBAu9IeZcowbmvaSdKfkLgwNQbkmEzCocbIJHNwyHv83Ig9NB.9wz.3K6YjsHthGw8AskmeL5SMyWW6VkIAzuMFyUl2wM3c.8GN3geydhaFevti6CWVbtdWALRjblLBihcDt8kUhURBdfGNdxpa5HxS0B9NiFmDZCwBz",mdrd: "KHn.mW7EGrU_qnJKMDIaR7RTbt5vXDULsj0XVnQQGqE-1739793767-1.2.1.1-ON731nbIwZuHaV2fBzYDMHlr_00t1sFD47msS90Fm4YBFrLdNf5YQZoWo_NRHHCJVibqsJ6bBxJelILkKy5_Az3b449YrOlMcIQZYgMWAlfg1FKXuvNH2b0ujN0PEF.K6F6eHbeUWvkC3PvZlmGlEb7G6vagZU.4KYsIufYofpqnWRR.xo3qdXZ0a3SFpUBNx.05s.32RpY3nKZCFlWAM3uHELibsjfNShZwvieeMG8fq7bYZd7COI1exVfMpXau5CP4VA5mPAz1E9FzvJpFjH9UNnWXZ_WhVWRXine9L0KyI04naZ9aTbV5CcnOwrfNY_4wLH9Uzfp5NMFfJ6E26S4CF39EiG4cwG3OzM9xOes46SXtXmU4SSdcjrIdpVmFRV5NeeijXTjdH4Pme.zAUrEeMk9tE3ODknEQDwObMHCbWj53CR6yKD10OEJ8W.I.nwcXgDHMrn7ktG_D7ER2lnzWD.stWsezmNaxpyLaQVJuyc3stBlnprclfBB7Ln__n2VguP90275vJjNDSXl6ygc650eE0tXAWbCTLEwYB_MUo35EpjaV0o.aOhNH76qvXykgaISbrGa8r6_ngWWIJBRwbzGWgS7u05FHRT6wbbEuIOXwkqnxuwX5Jf.m94K_AB7rsektOQ1jpqMhrvEdC96VY55um6OyD1fmW5NjcmWDX9FQeGqU9aAiQjhXX97gHo1RBr7srZ319Zr7sdtMAmNGSv6DF8R3iCXyMGcyaXZrxs56bFobx8QZmOR3B7GVckYooaoSiP2bLNBgGQhKLWieCPaiMf.Lasreej2mMWNteBSNfC6p5bipRDHziCMVZPnDmNrBqsll.lzr7zaZYNkZ62BwXcHpxf8Zk0XR8UK6CA6h.kj0.qyF4jiK9jTc_tgKRWJO9zWXZsqTUlVAlJ.2HAh1zAh0oejE_GDOwlbzNfWetDABBtMC2HDX58SztupbZPvkfC29AlDJZteziuD4i.UDmt8UDBaRVt1VUqYueNn361uf6OCIBpAyVE25gEOV3JqOntR0dUKOb79rgWZkmyUOUYlP6wLa3ZsL_lkqanN.ofWzxRoM3.UDvBZi4WF.3Ktm6rdTsfrN6luR232Vd9maFmc7vMeXDa_o0.fbDxzqpapaGoFYnSPC80Zz1EMjIkmYXRPA0w.twN8Gs1xjnKJzcJgJYZCoHGPLYYB6Mb4Kyy86GmMFjuZMsl9UuQYg2SGTARrXnAdyqFxNrk3iwXWi9WRNL1F4LIbkz0SLXS0wgmrWSn7MpLqDMx8YW9tJinlNAABSL4weFSyaFRjyPhvmfZDWoXWR7epbnb6hYm5qjvYBRGmRv2eN5Q0VQVCPHcHM.Lr02xYCjJiAu3.7C4fJM2YyZesfhNcMSxE8LSJlhmc5WhFPZGzZGx6T4UTFnRsn3Ys1kCutDYhGIKxACV8GuqUIZ3YDV4MdZiS__sP7odi7YRmoAQiTxsJYqJ0uQd.Uc7xAWe.tUloEyt17QFECPUumxLtobetmPRlsmlGmBbI2qnQzPrg_o.aJ2kea_qEKTCS2_cr_QhRwKhucWWR4dr__AOFwrYRHNKvoYmYgZamoLDB_5ZfniTQcbs24lfayVq8xwfuVDuHnyyPDjVubCysapfzAeSgBnmVtJUwqiWQLwajBBjJ47CbuT5kiwdz8Z5w2zrDqnKGg1edb4qWKiASnhb9SNK8Yg6Y0jB8sae7PJlINahLqTUbJ3P3ltSc._Do5Bffz3p1wugA7QQyI0MgZNfH5ids4_gryinkY4McN1P_PgV7AQN3psC3H6oTccB2jQEuJWVRpPz8Worg6EfRBPsP9zVAUfmZWerRJ7yx2lFgkX_3PosoPTkVFLcGjTd6D8g60aclztxDqgw.icaGGuJC4TUI.yxqs9G9wxZI.eklQUoUuqi7wiArCzti3hcrzgmdOSo36gXYFdhGNZnkWouGHa9jMu2x8TipC7mKirS9G7qNAxHCm"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9135a167bebf9daa';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, "\/search?q=and%20zone.&__cf_chl_rt_tk=ictve.DsePO6Oxx7Qpena_Fv.j2vFvVOHcr3PJ8G93I-1739793767-1.0.1.1-MyxO9.PWMZTEIybdXCgpWqm_rtcViUeyFIC.PAertDA" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>