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,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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: '913665d66fecd083',cH: '8bIbdvvBYevNtb7LiqDFbqbYc0q_9iPjBy0X9xFL.pA-1739801813-1.2.1.1-85YAYaj8SmdWAI0lQxu1AQ8H8Vu37klWQvbP_VciiGmi7a1hN2SRU3vY6MWAIeRH',cUPMDTk: "\/10013110\/bibtex?__cf_chl_tk=Xty8U9PYG4R0LPAnSa8M0ISCEIr8qVTl7Isg0bQ4lzs-1739801813-1.0.1.1-l5fznsj8UlAmxlqD5BZzDgVYiUugRUPxVgzYQwAtyVA",cFPWv: 'b',cITimeS: '1739801813',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10013110\/bibtex?__cf_chl_f_tk=Xty8U9PYG4R0LPAnSa8M0ISCEIr8qVTl7Isg0bQ4lzs-1739801813-1.0.1.1-l5fznsj8UlAmxlqD5BZzDgVYiUugRUPxVgzYQwAtyVA",md: "j5CAcmZRyMfK_4Xh7zrGqXecehAdjYtti1WHXvcEbWI-1739801813-1.2.1.1-seI1rDK176CGitnoJyyQtpRPAypquVCgqIt4YliVry4hFki2nidfcBinaaLamt3USXA3SkOimpCPA5yBBfkmnLk57Rp3b6asnVKHdb3Wze5D49xuJQpdaEVMam2bZo06hZQKiD0.zNm4_SYJ9Dm8K_QZdMFER3_8_.UIRMbgadDiZMa5y1jzFNIdstBdkT3UNqyKOVbrNvt8n0e5sXYloci2KtoQmWFUtPF0WfFjOJ3EuKWirPExGgXecVhr7842Yt.n67FPPLozgKdugI0idMwCaRGJc3ZjysEM6Wa.gmx8Vs7MdJYMnGQUEtZIvDcmSu3m42ac8qfeawLjjKBM7wr5Dit5c3GeUmbQdHledEYOCuHXW9XIJ6YGy8K3loSl5OfXV5pRaIPe4Tt.fx_vRS2ZMRmypsizjW7k3Jqvf8OtgsAI12spXo_XUGmpHqFTMEvyqO8p8D5UESFz.x_xIFe8mn_FK10iQ0qzgnUKz.9X5Dm0BdVawxf.aneT_pnokD9xf5TXzfOLOsusz0vd2Ad3DYBL2N687UYIC1G4Rbv5TzII_m2NMFVEcJvjVrW1Egb9o3XbylW.bzxtTDS6ha8TxEXOf8Tb_seyFT5Le7Zc4mMDqG95hvpNSakZnS_wnd_7IVO9ivbE4konhRzxqfTHQowWjmqSdhm91cUpD6M6eK00no1n9Opo2_v0q3HIVMKCXKMo7ETXw8jH1gduBp8L.Z4feM4_n1b0WF8w5FzVS7it5R34RLn8Ng.B2OQhlULqNILpspeh2pBE8qHoCLXhsirqXIrqdi.lWddfZ_tYpCsuuEdsf.GyXs9iGSd5hIB8DK8EjzuXCwmgekTfSSAX0cMnR.6bDoKPbDqR91io_9X53rQzsZFMTy5kwqPcimhF.DeO9OFcuhfg2WI_qdQSYA_blxU6_CeF8MWLebTa_4K8jkhb1wGQPGMUMLJSc05wqOl2X.BptfT3x7H.qZViWuUzlqtOgHJcI.ci7QaEdYgnfU5HzSJIQcKzqp2Mm.e5DJxyKhZZ.8wueI1c9OaSeUT5GrYG_I5OdCfZ0ROlfMrVI00YOje3btX_lMLV_VF54RqquIT9enU9iGhJ2a2Ybzq4VuFqEBA..YU_zsb69Ga_yGS8LyGGrQbiV9ooPP7nRkLj2I95nzAlPB.QvaVp4g18f5zcrrgm.QuFPcg5NHl_reeuRI0CCwxXCji_2UCDZamHnwcBv3RUPgk2Oiy0c0U_SzNMmTTaacbOAQs28uPtkbUSJors5_I9OXbJ7uH8lsQ7nfcA3VN0CqKo7h8WNC1F7qR8o4BBiuUyzGfBs9IwcpZ7STs2wBNxS4QhOEFwgfv3an1BCmmR2DiWrX2w2KP6WpK1T5qrNL0YgWKI_twY4JvQo8EPRJzt8kZfH.Y.WpQX13E.Zd5UfVX6zeoQbdX_NRjSmY7RsKSA1wpg69hw9JGdNZZVD.Swr0V8bnyXeMOAvLLfdt1wPUZ9DCiQqztA4hyvBzFf.zEPVBoiaE0wCKwUT3pyBkXn1pf55rDJAKqJ4BxPKtI5DVbDyK5o5FpNE79ZtxlMjqRN2LChqn03ZGoJe4JXQSXZzTANCgLEXB4NN0bPKDfhnA.L_5gFqcnitKIIjJJs0GlSl9ygc1XdQURhzbh49JyqeNT114x21.nxD0OEa139Oun_aesQ21cVB28GsCBTpgbhszVL2k71Jx1vFQB0efkRdFfmbi9W2ZhhaBe3crcojJLm0L8YRDaOcxq1bBrCkJlraTzNlNA1U9y046B2b3kUNvttDkuLffdRQcu1jbGjw69En5We.dbSiZYHxr3zpbSzcQb5loO4wFzFEIsUmS9Mreq0YM1Qyzs7lf5CbEIJCK9hALMhOK2sT71m5tra5AiYfoI",mdrd: "p.LvaURIAJ8bN52sLQLmwjzgeHSjJZEY1gqJD7zAy9M-1739801813-1.2.1.1-xcd.c_DQXPEOLsTouBMjKAK2bkI8k5t6Z0pxFe0hB94PeHMWujs7aDnUu._wtPtEpL2n_LXTxdJWUVpDzB080FMWfwGCQXyqP8CYl2Uht7TvIsKbmfjvLH9Ydu9R4i5cMxQWryVmCKgDIayZmTepqxHPsvIH8FlezxzuAwiFiKV_oLqPBcB_UC3VgNdF2MGWNgEgCyE__0ODFmcUjCOYCc5c8QqjHB1cOpVKc.jpw9MKUaoffPAkXVebAN425s664EsgymU8iGCVs9T6Ksf..wwzjoObCIAPy4v2Rpe3C2uYwQIp1Yi5zp.myU9KXzhYFzc9xHz52kTDoaRcxpGMj4B5zMIwrxfkwOEY5GIdhhydd8RzeaSQoO5PmOMzOHmeYso1MdGnPcdNqEtUjW0raYspdaCXpLrAx.P6SETDSkM8taNfNcjgKUZBPenkPFcRnT0ErhtUYEtpmrXaU9OnJj1JBLveLog2SDf.VzjNPPR4USKhNxW5Qd5hU_yWJ9vPvJvtHTcvvTeJvWCiN4_ngE3lbNpa6zZnTvVhJMqTjRrjrZV.TN2P5xh6goY8cQcFYBQ0udRh02FLaAJKdjm6WZu0jBjPcB6WxdetDACFx9YXcabY_7hkrqZctjGCa14zuQNqTfEI.rTsKpjw2k6moMHDI_qbhpMez_Xskj5Hb44FePfo4fJTfEvK8HLYoLmr3tpbCr3N2zRNMBqP3QryiarncAHNgpU92wJEPVWQfSsFrNlXQyrb0gzNxK.kvlb2JWcITEk694DCm0BP1bSfaLBt11dIF8kYiyWkeQyChqrPQE6V5ud413GGLgJQJUd.wTTVnP6JdBp1lz573O8cpeyugOBC3Dl_V6r3pdaQZV4BTQ1kBmgmSHsa4IslAp0taZWFrkRrtrv0EdWAFAO8iz00FTKAOVak2PppmuLdZhnw6yuYcyt5m.ktWhJiqfQI_UFEbxfRast5181LSBvRLOQijhZzXUUAEXfpqIh08P_.mflUQO5pg9RSvvk7uckDGOXUmXRcpD7l0j7k._P72735HR5HMkJs7CAvE1bAOevGG0Ae4OkMd_5gCkYVGYeEMfn5rw_0Pl7VS1a16fEcWPGd0kTk6dVDGwXnLczXuUXRYXucX_WKXtghJVxz9BfRoz6RdUDU1WIN14q_e2EiLaoWCnRv6Y_6dc7p9tjpJ7awywbtAP.WtktOOHO9uRtRCHWcMS.UXnFOmEQFxk7HtyKckWCn94mMdEXoXMj6k_0p.MsKpge2ue9aXSgWCI4fhfY2rK0l.oH.vBq9SyevOUaEMlQ2bYFv9h8OFWHTcT8J6F92LwH0No2ABLXIOD0x2m0JBrzx5uO7sphOBwueGCvkKbaq2TzOOFDxfEzU.KobYejUfFE80C2Hdm25PFhBrdb8UGRca9OG1Spaih51lGhzsU0yYo05ZlhBIcDXw8NR74ER2pWYgfL6RBzclEQZuC5Npu6QehzKSKg1HyRDbzOnUN17RUDeuhOvJdCxPSOttiNZFsU6GZwsXaYSutBGIPy9iiavsiWnVPnmf1HsF5QqK7ueZe7pIOv1Hd9sk.AnKshMAkPdmZU.oy0.UCdE9iPIBzjM0yUhaBOkZiWy7mgR0tJHAYw6gYnpUquArF6.2cqhjVQ28eqkdfe.X5Rzaq5VFuyGXXHqY6nuNCWFAC1JU83QYPt191jJmrtkkfOItUNxe6HAfnZujko3.MYa21qNmMpX0Z9rS9bD0hulMuijmJ3PxprNDoX6TgoIgRi9.EdoMAqp2xh_XkfhMh2vR5ZULLi6V9YQ5LDIR0lqhtpIkUr3AtyHEEfdX.urQwdQDqe_EQTic8eCMUW3xLq23ioHfwuxEwsw_sD6D2ARE9CJTRWTI3Cy5bkiJUH2Oy5QQWu5y5mEL_hhNIsJPJJdnnEHvGRElz7F91V4XFL9glaVWwX.5MicP2csMmHnktpeEcgiZ4aB0FchkbrIns1U"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913665d66fecd083';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, "\/10013110\/bibtex?__cf_chl_rt_tk=Xty8U9PYG4R0LPAnSa8M0ISCEIr8qVTl7Isg0bQ4lzs-1739801813-1.0.1.1-l5fznsj8UlAmxlqD5BZzDgVYiUugRUPxVgzYQwAtyVA" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>