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: '9134b6d3e9864c03',cH: 'a9djUbQJwnNttloauEcstwBqKh.8KFGZ4KSu2WjGKgY-1739784159-1.2.1.1-QwTyG.kR2qadt.bhHaUM3MQShpBl10Z40PKNnsj.eZPX0pSW0YubgPmb.XRlW4YM',cUPMDTk: "\/14439\/ris?__cf_chl_tk=GQ1wRdY_P1Cn0eXe_ouoTl1NTdDsBtLOWWxFOP4qAbM-1739784159-1.0.1.1-Ij1jtw9_eLBxEKZJZlYoyFW73Lpc5E6Lp6ulGFrt2fQ",cFPWv: 'b',cITimeS: '1739784159',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/14439\/ris?__cf_chl_f_tk=GQ1wRdY_P1Cn0eXe_ouoTl1NTdDsBtLOWWxFOP4qAbM-1739784159-1.0.1.1-Ij1jtw9_eLBxEKZJZlYoyFW73Lpc5E6Lp6ulGFrt2fQ",md: "ilbZrOuMW2cPFAgY8r9aVpgKnQ58YkNutwaU52VzXkI-1739784159-1.2.1.1-aswH3ImNiVKh6J0gPpXM5GhwxnS4ANSNwxoFB84UPCVq_Kh_kY7qxe_KTOb4_In9_tL429PPdNjHmFE3LnOh6mlvrTtmrkoxYvOkBoUgvFeL4D0czaymiG9NFsLADmJnZaXpAWahp7DxGVJ09TLmQAIDtMbvvo6Gt1D4TRFsUQ6HGgSMQZzKBl__lBllyLH8imSIkahaVfNyatk85.5_uDzIbpZFKFPDh2kLz90IgwgFPmLhe.2m4oY5qk3ojv8BDqcfhGbVOEVYy2m5rzRZ_wHwSbe8tRMlePln.XBN0dUat72ZdR4GFeMsoB1GTrLoNNWyf5oeCmh3mUnnQaXcBeO1gpMHSUrPgkFCtSWlpDqyroG.0PhKkIhFslzpAhIN0FgbtYNo1m1USoZX42ZXW4B4ipBgR0NKAfaTSPBXMQaBPBZOqTV6Tglbv82sfDyLPnHKj9leEBKAAW8J5P.87_l70bYQVTfABmRugxU8GVi4hlJqilPHxThv2z7MxHR2WSVfw.UoM_BG8wULGo4U5HAkRUrvGzo0gBEXxlh9YyttIIun0pGdIKLD1otiX.Wz97uChaO1lxN.6kWJSYHKVQ84bXAOcdhlrBJwXZk_5C0KqRO0hedkKS04rnEcI2pMbtA05gMNgorzoCgwauk1gVvNh66kyyyiCzPuCPppyI0vicQedXN0BWVOYtbkhSd5oFJWy2_x_S4QcCMS62BhxcJ5pa2jreHQsSrT26I.I4xXdo1zXplB.lYGomjo.5NyvwR7k6qPH.YPJlwV.QRavmYgi8p8hMvTRQL37tjjz.KGqr0GmMmkezSu6p8QK0pUYTMZt9rKXl_U9EXhDVcpJWs5DIpYyLCNPE.QGbbJ55dE8jTVqrF65372uri19hbZMYO6YBoLJR7pZtOxRFa1Nai3lVEcUzZMtMySG7nwIUXZkLWxEVjTPGHmI5ElcHkJie6lluZFPA9yGMowimCMeZzkRY5NQ9JA0qbLTFKg7wJT2Ijlj6rwMp.dd_FL2967EJex0I71yB2eFIcqse8bPqa.aykEot4jA6I0iRr66VTyGNZ85ggQ88wmHFnZRHp1fB9UBUn24a80.44DeXrQ2hm8MqFM03IaraTIFQMY6EnSVHiQ2_PlDRK.2fX1t.bISb9jUI1RpOW3uYJRZxXhyp.rAqU7OdAC3mnM4QHpAIWcmxtAJJL3oAF64ckRUaA.cIE_2bTaaZP5w86mq4GcclUJdd2w5oYG9jEOC82_QjzXEYa.TI2wJQucb79DCnt254F04JjtbGkaGxTPRxfuxMWjc.q_hR960sDQBSK9XGspG01SHi_9hQsiWZRA1avUVLfgi.OWcIkMXxovITzXQFOdIB11k2aO.u.EpuAQskMhH_mFTXYc3SgPwmxlx989Pf8CIsQgCiov0yNu6A2qQ86uNsnc9BzuES18KaVD2.xmmm6k0isuFiwIH96QgJKN2uIDcLvcQg6E97lxHR3DLAJIIlc6PViteEj7nuX.cpV2xjSDDoM10oyJh_pBfnk7gnqIr1dODBN1AI2uGAZmYQulH1AuApHGDM1P_sprw1VgGS8CVxXjRT7OZbENb8Oo_yZVWAngx1HmqdnTrtdfK93NHrdNeZZMhfHl48wvN5e.VJ0IE0nLakLoTSUG9S0KieDe88vKVmbn0mxRIjAUdCQDyegp7_4StSuxI0DL9yLQnDHiSHOgpsy1Bwts0qS0yDSfijpn39h.S4qo3YeTyHoxcsZXV0Er6OTL93I7YsdQR81rVT_yr5nz6WkUzh6Webd17OsQqtVhEy8QN2i.3TUwdn9NEuJlukKd_8PKjLKjimaXvOS00Zh8kiTTlS8ZmWOWF4yhwX1a4VhGAUoiYEHfk9no9KlYnkMfINHkMFI",mdrd: "EXhV_2wAXq8pNXpNI3ewJ0T77cNIA_GNmKiJgfoqwc4-1739784159-1.2.1.1-PI7RuSxSI7Afw20Kj6TZUEHe6WuOmCjTRiweW_sjjQIV6QpaZ_Hi7CBaiR_oBk7ARGLevldm6f.yzjf8thXdrCcR_cYq1Z2JsNvm8MlyRUgqxGecBHisXA96EQP6f3iwQl2pbulSAfFr8ifIzHzNSDNnsCI8D_._CFRfXFRN9b6VkLae7bBxEj5EEc9yel379YJ2UVhsSsnP77V9AViMSsE3ASvHiD9JsYauKmE9s_qlzaKgntPDBym_eAAwYnVVMVz2XiGzwr_7XMpLFrEQ6X.k_EYfhWQ3tbO.XjIvh49EjnHQYzWpzzu1_b7Ayrp4CvjvGdIk1eGPNyXumxXAEuRpQxh53XpKz1iPrduUctzzjl8k3Ld16wNrPtRUUTffy4D.H0CP5ILh11olzv_PhFY8EawV9rm6B3vUONOaMjZD5T4T.GbsGDMQrjrbqZfrzUzvt1mN8whiZeJptNsqUkYEzBGGwMjZbrGkIX1QP9biQG2Srxlye7pPNsQgYq51PdYtfVJ.ox_6Rihlyoo_vtoO3N3N3OKGtUHqyfMW2FF1wNyZ5XXEFt73bgmLsEWqJLnQpeVSnQMt8UiUuQWhb4qDjzM.Dv3DK0Hbl3mMbOIHGLDjezvFVwZhhswKYty8AfVA3AW65Me43RwLh7gYbwSBADhAzW4b.rn2ehkLWWbL0NO4xCjYvzPsE2GuGTP.tmCF9V3ujOsRL.luhAPOpwTwsM.gw2c.qbOvOoVoH4SFpFZIPIG6Bm85vPRx0krXSM8BpATitCRjNwGU6EOWYaAeYVnqRXuX67q8Jp137ueAthdgAtWEkNxW9tLFc29J2tZ2g3So0WOoW7.5st1Ue7EDd6yKU_cP6C4GmN_Oq27tmgzMQmTXaw5WFP8.Hj14zl1oYqcsq4BrMVGfcj6uN3emVhSFbKs.hBBiTGBQuLFfjKfutTLNDseJGofjRd0zR01OSbqKkCDJDi_wg43.DtTTp3nYXjOKlEjmGEFQXlSeRoc0aOrLn3LxoMrk4UUJWVh4wMsWbS1wUcsTPnrhSiKiLY5PSUzVtRT687mDaFbRN95IQmVv5JlR0FnZUVkrugeRqnqO51SHVSKbGxfryS7fz4cCwY4D9T7IMp3I1wJ6u_vG35Lig3WBCYhC5ITKClhBUXYsFvqpVpWrhGJaVTvIMS6I7BbvxXz_kcTqj0S9a05A3lz3xImNDi7ekX8c0YD15sFKzPUdNBgZCTX6v_2igZfkUfrwbSzPhy0DeBVh1vg1JyHWI3yu1YYwg_f14yXUXZ49v9.wsb8SsGyoUQrBcdFsrUzGZc5cHvFbsPLPJZTzoqeHdzNKP1H9kAetqQvvU6FV5ZtKhRRfv7tQk1gTV73FKdbELJn1ctpFWmshTSUZpzd969QyRxbpBqYCJ8pR7cLYyzo1gZh2bIT9vqR94FQBOU7b.mHtS2JGQK6jeLdzW6.xAuYYqrEEpUqHbPUeaYUueXd3SGDY3XwDtFFzEJc2gq0pUmq8O9GXJfOQdgnAQYD_NPg__OWpHsdYBDRNgttUJvozC57rhM4jTTh1PSY_fyIilLLJSP6058Xm0jH0DHthfD4kB5EkG0nz0RJzcnDS3P.k32cYR.UcYFxCM1Egf4rymNa6L8uAD8_pqCeyY6Kx.31i2VZv6QK_.U9EPjM2B5DxdEF5Y.bDt0WzZmiWbtHHxmzi5LNZsJp6vx4twl.w3C8RSoX5_wyOD8IzG7YYr9TVZaRVgSUVGZ2bulJYxhxYX_qa.jMuGRYI4P1.bN4bgzTEToS7GVtgXxBorfdbQBjX.wKUXDge1LO5AMEA9.JBuVibbxnDuVLWbRaI0xKstQyLQpmL_Z1gnf7xvr80VqqacO5AZ3nAw3kqWN7C1nfm9Ir2VTdWxuT1XMOKb2Iv5RfIj6hyfNErvN0jUFu2Dq7Ze05QDVqyELqijy0t8Ms0x7BiWoEFS4nKUY4eE1yssC08WAjMxN84M8wAJTdQ6inEIAanl5cGXQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9134b6d3e9864c03';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, "\/14439\/ris?__cf_chl_rt_tk=GQ1wRdY_P1Cn0eXe_ouoTl1NTdDsBtLOWWxFOP4qAbM-1739784159-1.0.1.1-Ij1jtw9_eLBxEKZJZlYoyFW73Lpc5E6Lp6ulGFrt2fQ" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>