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: '913615bdddd83dad',cH: 'CmmvSpCGzMtrLoM_afvxadE0crBqXPlr8UhHvbqF_KA-1739798532-1.2.1.1-sjxOkNTlof2An5P09ftv541R62DX4Tt..PCTrWplLpTO7tLK_COsKhLpmm__0iMe',cUPMDTk: "\/10005071.pdf?__cf_chl_tk=AalbY3tkYYN0WSdspyY1ot3Rv0x79QRiuMe_saEo_0Y-1739798532-1.0.1.1-ZCdHVGxw_ZTHb8sldYg4YDqj7Qzxmp1hGCLDTJ5Owxg",cFPWv: 'b',cITimeS: '1739798532',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10005071.pdf?__cf_chl_f_tk=AalbY3tkYYN0WSdspyY1ot3Rv0x79QRiuMe_saEo_0Y-1739798532-1.0.1.1-ZCdHVGxw_ZTHb8sldYg4YDqj7Qzxmp1hGCLDTJ5Owxg",md: "s0DZdVB3R9OUonrtQnvU5QdaLRlFGGIhISR3I0gqP3s-1739798532-1.2.1.1-Sp3PZ.CzPetQezaW1_czrn28.uTs9O2CkxROkK7OnxLIJcT3g1Z..rSDmO0dIvgL_EyQU4QC3CRmVjJZZ.yOtYsrmZ52.pstrtAippK008r2I4hYx2wxU3RxpfoovPzF4nUmGzTMBCOf9EYJw0Xh3esjumYXWbiZ29HHZTOxJfJ06cHIeIUM2jQ3sBA.2eClN6.WPxDHD6I9QRFsa1X.ouBu0vuiS1DeA54juxUcSBgdNXvyE9RdXq_wqIpaDdIMXKa7HcirwArH0xJ1aJukR7Msaityd2uSI8Wf1SDgXHNEP21pK.EL9BE9sugNWhocDY8r5lTQYIgOVr_moMKy1y2gNOIBgWiqLwxFIHi23gWw3HaJD2DsPOURadTbH8rh5OUhXEL_eacJhuQucyxWJaU0XBSzqbujPOmESrtEX8AvgERLOqj4JAW3M_M9ULE6b6dCJVC1FAkiZSJbI_HRHTM5nZ2GL.IzQzUA0R14NsP3OWkkoURaWxJCqtV9LhAIeUApi1H_X_bijM0kW2c_QuTAw6vf79SiSCSiTXl.vNqPP5SWC46l.aVu2aSMDAWI6drJfaNBd4D8qCkzRtEyE20H4s.jAFjrXgbxKSX5qwwwtnaWjnVa5s74v8dZy9V84jzO.g04OAMRG5wcLO5KXqOOGjdbwUoor1lo2Mhg.Hjo5gn.Zm3.YTZpzrkBesaD0RhSAZ12nBC_hqmN_VlWiJnLYR4E6kC.r9bK5kkyq.7Ck6rCXyWLattKK8AHGbvN4rm9NXWwvOVPJ2QiXL7X4qhZFMd2qpQPUcuYlNkqlfH17pdcN7c5gc8nGmQ9IC2EcBlwShroGK.qDPyhpRKfA2h66B0FNRe4y4wlxTEoqN99bT3rxXwGtQwyUVN_J1xUpr3bcbpD5efjHS7ogDHvv0Db4BB9xUwNhwYcsM9UMz1Nhw.N4OcYSrZsH0zWDk8dsXjwG6nZAtO2mLM06zOvIrabcI2C6vSmyduf0z48SLFyi4hgsrebGZgrXDj8rQqyb9OGCcMcEm0Ksnj0v.o4KmnM4WOGl9_Q7fNkhg0ng1LJw8jSx8j6IygyTAJ.TxEQ3u2n3m3ZVPZPAM21y3MNkAhNp0aoZsW2XoV2ds5q259VFuR5z4AIp84inQA_iPC.HLdPMkUSRb5pxQj.MTDeT_V0lN3_opJA2aHNpeV3hSWgHek2t9rcPO6Ws1iEUsgvSuSce1Y85fNZm5ejOvT18zsvTnTc0nb5f86KIymfGvKqELkND9dkR0rXxJHxNvPP70SKSASbyBv55DNW7tqUAhI2ZeKGbE4_pmzWyjVlEHjrhZjXYZhZ8LF3HcX.b6gn.xRTnK082QrwVk_ILHn_jfXnAXmra4WBcSTn8kBfdarWs.ePq.CuEUvuamhMrmEAU_f3LAGXYJRtalCxjiV03oslbHv9efUOat1MREebyHzKHqwWHQoGA91WnObPtvE4mIAHFaAw1rTe0olxxqzFS1QIJBYp6tNgjXfefbGG5fmQCI3hfRkT3MI8TieLdVOFTDGTpxtnU5TMWGdz1p9VQvWiwzRAS2fDZuh6GS.aCfBz550asCnC_3g58MOKCjtM.FCeZ8gsFeja2LkPQMlLPhSi0OLVwkcv3UireQJIUaZe89DRLJZW0gNTziXGFK4QtdoFE.Omqp7EDDw5roAKVPT.QGZyLTfSkE_nK7zL3_HcRqPQVWy5EGKHELvcbaH2RQdW_PInHxc.JtHVYZfdMIJg.x7WeC5NSbXltVrzIY0rEY7oWiJZiTfRzoK0XAB9eHaFq6_e04j4S75hIgo35gxZVho_meDJvsNV69e8A7OFp.bARDLvRTUQ68dOTQDzxjDqLArK4sI6I24gv3fqWKX4aaEAp520AZtfDH45w2A",mdrd: "iqbcwl0QhgrAmauWMwscL8qB0SYHl5y2jDfpEN_6Am0-1739798532-1.2.1.1-ndM0TzSi1GuRWcf5wd6qO81VaGSatw3.nk2t300lWIlzEp7.4gARlkQ.us1WAENXcSZqCrM.qdWrdCEKhWt.vOCS9m13i27Wiuyt7RYD4ILZHlUPI._hAYUka119lJzi98.__MMCoT0aiuGHY_BNsvtXOPVDdwH9GTIBOIYjCYjBrKl5ebgMDroyDa33EyE8yDMrKDOGB7lg6uGWixJTzHfiHwLgkPSSMynwM4ewyzoAQEpGokxvb5lOks14Zq2BBuYYzQ8aI0SAC100XHBkiFruCD_o6.V8ynlJFMYnFU4cxBNzjn_0ij6uUB0ny7zzZM99Fj0WF5JPOUbJ6jyGiAZttM43Tpo0JmFeaWCxw9U2DSazKbq3SSkfVYK2uKFc66xNZTSgvtAeOzqrdKJfRMyzxnMRsFUk7TrgkfMaz3MWqK5O5ECWqii1egm0g1XbmvPbR9VOonbJjwqONACHn.6FTUHlqtcDcjUG67zU70rbv2zA_JgVSefjWBEs_8IvaZsr1wxuMkzcl9UCGxq1F3JVItj9f.OyWBdGEqMe.4S6RTAVZWLYx4FI7TdIETFI1hLGvFanhL8lz79y6foNB3J8joj_1Irdxi9wYJElCEY1CXV.iR7411cP4zWKuCiba00lOLhfWYWTeutDjDQdunC3WJdhlkM4dWvs2iI.kbPlP17TMXMgVOYKcGfSzyLAyXcfpVJejVOIyn4RJqf4B.nzPbFM9UWc.QSFfD9IAGgo9uiEcwpIOjAPeQPO_.zjEom4TF6qyjikHEQjz_i7ecBz4wbfOLjmapJWhktQSTrjNjsX8IbklPUUl_tZYiu1oUalMHz_.c.vFcWm_Vz3SPvInZ9IMxBkLHT4NAIKKrBSIefUXeAuwYB4RPK3eKRSEa1lKfgj.w3aE3YT52E0MMxii3oXxLHnyn.wisQ8lBvf4X4KP2bzF3h22K645oTc0dBT5fpZGSrlnvPHQ77914Kdthb3bQeXLHfF_oIgXEWp72nO56ueoS8xq_O4OdYdqN_CXXrb4YAEAUKlXp5Us3Njjl2pA8Vt7oeiTatX4kZ99Ckh4eWNaT5YNjtxdlZRe.2julfhHKDRSchpYRdo.5iKNJqJ_AF5gdaZriR4_icRH9.9ByYANyx.QhMfT0_nl9ZxGotIBE5mGX24eWn3.qzj17rx.2o8ZAsuqUnTCADvcCU0QUZ3ROQ3.5XvZAfBWfNE_12ddOhMSJJyz0QOikOMdOtM3GmYzHaHtw6Y.b3SjsqI12Zj6QW8.NjwUR7EWrLojdACL0998OxuUfEVZPybWuO7t_sqeOi7B5uaeVav.wS6j_KmFtJ.GcuObBl688PP.VyzwFaFt5PjLhLvIHN64oejPgmB1BDPBZkf_89yOlA.FaWfaxo3yEx1WlU_rsv1dqEfcdk.oswYQx20Xe_PQ0t.8fQgiOaV9eMvCvCHXe4QIrro_d.5AC7qVziBDO4Vg7CJpGUs6giXJs1YSfst57SapEUWkLbB0kmBkHYv6lecBsqi1zzw7N3uDA9tfC3OPNwXsSHGOWKBTbfc85WylWpGbQLo467sDQPeNkRDJMsYZ7MmUyr9YffDPZu7oLa_0TCF4yIGuOZqHr.gDgnZafWLrw8xQK8cXqqS92hJfXVmT3vzptJhYx0UotyneYFYg3q9TGcUJyQ3Cznml3WyzwB1nZ6bDTCgQWngToaARPkb6GaJeT37g4N4G8rv10QvhRY0NMEK5._2Udent..5eENmzAL7.JpVNvniQ3v_wozS.AzwSoIfs8FFZ0jxdRh2x6sc4nYBB186WHOk0LuAWlOW4bHkXfMLQJS9k8DkAvJ2TQ5XZPqVmdCQg0dbXyEA8zxEsiNe9lt8YkHFSQovMY0JOkQNi2d9lzxe6aovUuZdH6K3Eixnj3dCJ9k0kzhNsiFT8rNseVbX3iSu4BZpf_3vADQMAVnU0XeL2VjMeyAy69F5ssmEu6kAmNnsFgXWCiu3dRx3Uk7OUxTAVA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913615bdddd83dad';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, "\/10005071.pdf?__cf_chl_rt_tk=AalbY3tkYYN0WSdspyY1ot3Rv0x79QRiuMe_saEo_0Y-1739798532-1.0.1.1-ZCdHVGxw_ZTHb8sldYg4YDqj7Qzxmp1hGCLDTJ5Owxg" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>