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: '91341bf16f7a4491',cH: 'zsTg4gyyIhU4Dd2uBkwXjoWK2Re.JefB87ovGk021SY-1739777815-1.2.1.1-DPY80EyJqPqVnNaVvvrtCz2ph6Ik32clWhLeJIEoCq3EQLZ9npgO6J92363iR39F',cUPMDTk: "\/10002103\/endnote?__cf_chl_tk=S_rHe9WzENB8ZcKe_L0M10U_fZG7aZlZ6Zvh149q3yc-1739777815-1.0.1.1-sMUuXxKr5hrZdDBYoXNLTP6yLaMlx3jr_7iLKw2BgWE",cFPWv: 'b',cITimeS: '1739777815',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10002103\/endnote?__cf_chl_f_tk=S_rHe9WzENB8ZcKe_L0M10U_fZG7aZlZ6Zvh149q3yc-1739777815-1.0.1.1-sMUuXxKr5hrZdDBYoXNLTP6yLaMlx3jr_7iLKw2BgWE",md: "Kvxs6PGpAtc6KAz6V1i5mnMfYPZwfxz7hsI_4NLlaHQ-1739777815-1.2.1.1-ckWSp6u8AYAfgh1QtP4FNrYw.tz7j7quyke4PnSUqHhq8ueK_KQ0JXVFCVe5Rhxk_nDnPVTckR2AWM7bS.Ok1Nz8zEaRnkzBiUNQYUU34UU1dHS5QBI8qfB.lD4ht5VHx4vVSNnYhUIqkhGvAvOEWbU1YQ28WK7cI0f_3hc80Mx_pV1oyFn3gzejHuBG5g24FJYuWb1taK4irCX1QtpaxN23NWJV7ABuEG73U1wkWQC4MXMMOyan4jvhPXUpNS250IRVhrLT5q7ttiodc_tQpl90GjE_QJqevOfJ5s2UBTCp_XYu91nxam4YpyqE_.wCe9UJexpeGGj.hC_H_YEpvZQ7kGLpvwKwTTg1MaU0h1vfFqxg1It1bAQxkcQj8K5dGqAVzh.NJEzViBTLeBty3LXh.s8c7LrtmcvFqGbJImPeNckAKVJRCR0MfdGPwqO3C21ARnzl3QPXjUYTMl8M8J_YDUPrDtX36uLH7olxR13ATqYNw63CBgL2xXfvIiCfBPIstno_LQ.iP7t7lIemTb7UPTyoHSLC26PA9oT6WXsKbTK.8mBYvZA4k3d07DkJ2vG9W_r1WqKWfZVYHHk_KmWQMi9YqXlUdfBrIBI1ntiOXryWr88d684RhYIMaHVwnyPn3t7G0ut1yF26Y_5y_NP5wNDXrIEpNd8pJL1ovnVagTY_ViDr_EkK04YZMZyvhBertXtuVBM4oQFDcou4Ukel9r0PEaq2Sjsg4qNfTJuGMWob3bTIQHWRJSR8D36qmShvy1LqsYyGc1dAzD5CRrpp7lCpcDGidxEigHbyI4OXA46.FxdNCJflxX1jsr_Z4t4nM6cFGjfJoBfDWOjJy4r88_tY0w4e4SonQGew5s9IEUk53_.D4veWtv8des5IEf0wtD7foSyEhBRXeuAPwzsqYV4TuWZzwRnhPo38Y3DXntKr274m8sgT4t2mMVGKyff9CEm7oYsqJxxqi3D72M75O5nHGxTkJIbMNgD3IsO.FNGrqCBxioFtd6dlwDmsUuFssyQk_uwSkV_XkMHfLy0OSSnl0pT4IoK580cUQ5ToVVSOSKgPNBQABlbQrSARiFy0u8QjYC0nssp90oWG.TPtgpjlZgsufkTdIOnm4X2vTWnpy1yO4KaJJveqUIP3vAmMVdCBsbRqzQ3RsnrRMJdolHqkNkFU7FyjbiNtTJT3Wcs7K7HqmX.tBHHSI.u.rjk3eQbjwM.vXCVbXV6CDglHdcTz5uFAYbbDLmYuTC2Kw_hZSd99O9_zLDtBYRjEZs.qnizgVW2kmXYb0sURWZQMs_9CnTnpHFY.rnu_CiXz2FH3kYpQ3nFcqLzY_YHGzex0KTIByI7lGt1qmJDwe2sR3e2iz48115q4vwc..SilUQ4kv2kFBv1Qn2oyNFdxtSgWaGnbG3nH8EEeKYmvqes8HU0V4M9OASm0z6BDqjMsl5ld5FhnpqUUGxGEgRR_tslJNPHIAVm8nOSIqEzkP9fir_Aw0XuZ88c_ankaAeZDjlo_oOHLCANwXPK.ge30MvPyoDn0UrHcTn0prBz4ub3W0dGMfMfS7.hUkGv5vTI6mpjkSuFxKaV1MXo81lca6Wmf67iQfPNSKpw48R5Tc5uKb94.bYPYxzov8xN6PreUSFh6BFvMTqxNwjuVEU2RDBucCMGOiUPPlVtuvRZXCC.mgvuMn_SbkXBoZrZH7NF9dYVGvQUJrEU6fIY8F7Bqh4sBT_wLy1tg7z3s0mmfbPVGuc1xVHE9HdECx.q8cEODQ7HPeF1Grzn22VVC1110SrQEVQia5PGu.deB356voqVnzhMOjx1El36bfBSnSkQihFwc.PSK0UxUvOpWJo5fW_6G88_9b09mNOYG_d7HivpkcqQtt.L8IfAvWdJEjTM",mdrd: "X59Y4_FOsclddTRgCY._hcgFuk9vi9Ch2mg1A7TTCeY-1739777815-1.2.1.1-BVW9hAdiVItcp09Qn2Z0lmn5iZh2qxHXwlJwbvZHZb_q2gbytQQduxalL40LY8UDc0825p5YMrSVD.4XX0gpuEwY07IAQXlfFE5gSbZE.Tbx1bbiXB58qs5g1GZe3idFPdplgBHj8YRoXO7yxEvRsf_et4aeSMSC7paSocyZH_vir6MYDB91YlZ3lKm7ARuBQtJZjrUOcIe1Iv4DOZdbDY1cYCmlfWDZVDJwMmQk6X6CmI6CqJ.ETH0CsCSs0gnYMcRwk675bqd82Qrjk9XOjPvdyKBfCuh2.xOeM.D2s3rHN.Tq5Q24l31VmNzfZ0HYRhUAv11xD_Xt7p_PW652jslzaqlwvWdUStG00lxbqZHaaugglPqbxSVLPfa4LxyH6fPA4fV9z028xx6XZsJhsIl6Z84SE.mpNPCm1bUn1Tj6oJ7sT_SlYUGqx5nBBnWFY7FuVnGBOV8i8z7eCBUDzxaaCMPlMgj2a.ctTZQJjso.HjRzktmuhbuTdVIy7c7t1loZMbWPjvCTZ_OmkDAegsI6yt_OkoyY4vfhfJFt9OKY6ll8aJ66aHRe32h6.5bBMY9Ew8JyqqxyBYYn_NPQC2gQpQ2Wci5xnCqOoUv7zgjfS_ZO3oCF1Zje0tacCCm2wJTmzKY46AHyr0sE0Py3JrBsqnLwXt32522QN.b6cAi7TiQIk2KZjRp8qH.J.tX3Kwwobj3AdC8ABurD9GrHkNxzrKRKhcKypLrhxBaZHGCEx4w4Rixqfu7LoR7A3f_2RdvsoO1lqLKuX0ichdFGmgCE7_IpNAqol4_MgdUcWrdLh6zAZ2pMurb9Pvd5QJxwbmWL0rhlXSQ5Mla.Gvh6TkOtjRtICXXEEUKSRpXv8oravtmFbRG1r2NZ41mPwIlzTILX1.0.c1HFSzrtjoeHmGFsNLzuYb4vIL.RqoXxzk_KejIDy6wjGbs5RW6RNAIPDeCFjIgHFMBwSsXeBrL4TLCaok482zqYweZag0k_bujnJOykodjkOD7K9zAET8vmMWD98T7VkrDptbMCMOo.yoPpR49tyOHPNSz6QGatjVGEuY1NkTWY460y4WYXEzAOSaHL.9eV.Zcp3WjG2UMrHP8FDHImURY6jetpL9Dyt6HkiYc.OIeOY_wTRB_fyoQ3Kas6_o5bwBkwwnkNL8KLqp7G3w_Y87L0Rc5GZZrLp5Zcs5xeeQVp6Lh1VlmgdPOcFFoydLOD1GbJsvVnVzxNWDopewcL.T62729Vxkdno8iayTUOZ1DPmWBXU8EyWV10AdS5hn0m1Hlqf8ZM6PdVBivLjhmWNWPT62Or.8___zzS2RI6JzDGLbZFlxQeWOh6399wFqRyR_XdKLPZFI0ZNZ6uYHK_.aPrt2RgPsalRy0fIplB6.f8Rd3SPnTyPPEm1dAbQXiYugh.m2Tp0.BKpabq2zycFm8LFzKiILFpb.XfCC82PgbexbaUvV84JNUPxV1Rnm..Z6jmsy4AZBHx_xKdGIyr_S44etays3a.sofMjrmQ1_H4KuI4y0FvdmIGhqc..tNIHpjKmfXunVzDYmAmaQmiEt.I0QEh3g8FDnVWb6mUppnT3nYax1etmzvVLoN5JkTN6qZuzSa7zPnd5CPnlUQMq5hHFmsGgpWNghQSQmSIF93GuEIgf5T5ssqgJ3erIsFDfRCv_J66J3FqzPJXFYcL8aST0BNrQzbkOptjaFB31MTDB.9sJGusUM.RPhCRiUXGtKgJ0zwk05ZBsHPMpx.Ylg0fc85ScK5AtPkV2LTQxt_4q.KWIuhoFBkVsIisjO4osiEda2hSkaJlPeuerr38hbgsD.xHmLfdpk27i4kPAt6gCVAdKUvHV144_FE4aTmt.tSzjL0Agi19ZZEuboqIyxJX5wafO7HY674gGrtqlKQv4Z54Yjuqllu1DcRCWn95O6keWdsmvGWOo8BVhfXZySYGInwuAuxrQRrKrQ7efqXwUs2YPLdyz2B2kUTtVZYz.6.OF1boQoXhZA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91341bf16f7a4491';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, "\/10002103\/endnote?__cf_chl_rt_tk=S_rHe9WzENB8ZcKe_L0M10U_fZG7aZlZ6Zvh149q3yc-1739777815-1.0.1.1-sMUuXxKr5hrZdDBYoXNLTP6yLaMlx3jr_7iLKw2BgWE" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>