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: '91340203782f8bc6',cH: '95fGcjg1SBEsqvNA0UJuvYE35CWNGWgW1QLqiqnv6hY-1739776753-1.2.1.1-zS6OMcPTIRSCbXDj1bz9ceD1jXhUPMoScNZLo3qFIfl78lcYNbonOKSnwhoPI3yt',cUPMDTk: "\/10013571\/json?__cf_chl_tk=Hlz7T4oEeeV2bVzGkRSCMfbyYUowFXLwAoHKd1c3hwk-1739776753-1.0.1.1-fhN8OlTCTNVBg4BQd3625McQpz2vJuKXPdS3oqoPLcY",cFPWv: 'b',cITimeS: '1739776753',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10013571\/json?__cf_chl_f_tk=Hlz7T4oEeeV2bVzGkRSCMfbyYUowFXLwAoHKd1c3hwk-1739776753-1.0.1.1-fhN8OlTCTNVBg4BQd3625McQpz2vJuKXPdS3oqoPLcY",md: "V8rX8gMglRpUZyVPUxuiRqwRO.._mvZ6deesXnY0Ubc-1739776753-1.2.1.1-9blDBdFt.70F28LTpWJF2uUvpB8dxBRMlNOnvDc2Q7ukBfUG2Lm_LyVQmur1W.gjAuJg.3YLoO7UDfddxCHTSlhocP89bgpm0T9oMvtouyPx..f5dIgIM4P1WoY_VseDE4KgKakVxE4W.cSdMtkWTKaRJqmsgu3r81oDLV1hPdzOV0OMee9vG4CnmOKFkLGjS6O1dv12wuOZ.xDTg8mWYzz_eK1Aeg3ralfjyyj5F5SMEGlXsgFTqJEOY9IDGLQYXTtr9bExN0L1fqDxCGMPK_GEqHZtGINbKri2Vq79igZxdeo3BgfVbnWGwiQGo6k_LVgbGud0AVXnlQdDe58eKam.NNzmKU32cAflDTB_FkhMvgkXYaYkIoEgJmf23fqcP9OLZATgW3B3kNlJXkjFOGW7vfYxseuNfnBVi7Qs716B4_UMLKbh8X7IenPj.fOzAFEEO8p_qNtbf6A5W8_oOcTmnBSg8HUV_8vHTThlYq8JkOd8qamavQ6S6FNyODIBq1MyE7UtHYJqUjpG3M2DnTMiXMuaibC9p.h8X8hjPaw6HeWs7KQA.ngBYP3qGFFs0Jql2jQl8GZbV7dVB9rNC3t.n5tRSjFR06Txo06b6Ir7sdf3K6W6ef4RyiY2i6UIjjtDOJNgRhyut3LGX.Hh__YwzZ1sLcd1lyrv8n4XAeTyPV4uU0d0o0BG_HR72ugeWOVRnpGmV5FcfrX1xqK3drBdCGA1iI1ZASK0b_AHOi0Ri6_ZXPS7HOxJJhqGLYDqUKKOxAve6W4XmzIWFzN3xr.4AN_TlrDFPWL7kYzGiladR8IsSChGEQLSEymd85WIjMc4GKfxOEOXgAw4wvDyI7ju.vTJMSOiaZL7QvwXt.v9yYYZ0ovtPjX9o5YvZcJE.uaG7Hv9Q8NNLKKJjR0qsKepVcSvzMebMIryj7cWkUmkF2e0n4_TOU8LYyvfp_Fw9UCQWRcf2KA2FBO5Ppvpz.U5sCq5om8P9wx663WO2iYKbskSAyis1bc10gU892Uv8yzXgiB12hJ.nDpYzFVOzS_ahmdEmnFQCYXRr885KXTDV0w4tPIdZX9gHlhAUI8n53f0cy9dfZ2wuIUEqI2jG6BTpa.9sNUz0oUVOHo7GPibCMA49R8obZh0mqFsclTNp203Fk3DHkXzok3ohOq76B_HrbRXBbKHddJ8RSu4vEkiC1.AIXYYrMKIc56F0.yZEkf460xPgHgCmXQvN3LNb013q1fN60Q9VoG9rqcvG1NEEhsqxvAMoIKpXGCwSXb2CYh26SGkxjkbvzIr.z0qozcxEgu0ICTODvg0pO2.6TBpaPOIZzMqtBajnDtsuwJgwHf9nZbKGpxasIYlqxDzkfPq.4bCALnEpkGWdjiGo9Fpk5jCiHRTepbvFwqaYZR.8BSqDCj636Qkf9073PBnMig8m93oqFu2rR4C2YzwCJ3l4Qu07uEK57dHyqRQTn3HbKe5HBWWmSly6pXcGW16UUneMsj.LzptCfzHuILUgxrpn38W5hiposa6lTfUFEvNSXYF5lNqygJ0uqU9g3.KZauNWeQSXLwjzEw8dnUQMc6E8T7bKpjxfh0xbUUHHhlYqHB.f.et8L9v_zDgL1LcC5ZC6udezH90oV2_bjPY0bkG4LfJvuOjgV4_V9Dxpm_yy6DAETbBG0amJlP3ALhLeUawv.sFh2Oo93OirWCd9hBOCQGQ17CSciN2A8KaZz7xdv_c0540QeN7E9sQUttvXCKRVh2aQlgYKk_DluxKOay_.UEgbo8uAtLubZCaRh52bGRM5sqvIh1qdvs1GuC8XCGfhe76N8nqZiqRJDseB5nWr9n1gZjzO.1wC2izQt9jYi8pEjD1O.Fmmd4vwbN1rGB8UJwi5N0D9APx20GJjf8",mdrd: "xGd8OgIWMoGa1UdaNC45UFCT6tm6im3Lk3qfCxVx51o-1739776753-1.2.1.1-QLfIfY88bPlUt3EpsPf_wGTQirHVNAibqK4vvNUeJoP_yspQ_m1PttBVEjLYreYocq.Qan.uhtXJRXS3fCv7GI6bLNpcc8VWRptVvzcaM6aY0aTZATi3.2TSyW2Hyf4wCcISm4vfD8Qq77hKPgVzFet_cHyyIk1Av4H6BsNPfP4uzWq74YNdOxsPAqZ1CdfMzvaUikrFZfsidEtfBAMdzq1pNCwYW7kunfhavv4VbblOQUEtQRJ0mlGPXbzJXO3hcSoFOCJlYlwxA5Dqks_IdP4WxVQPkm11tsGhMMC7zPqz6P_ILG4jCu4ioc9LCnQa8hIm7DdLy2ZKUWgduA7whKmlXae6n7tJIKQk3M9d1I0a7peJ0niYloCM0LF64StfSscp31kH9tagMrZpZkA4vMWAMXqKpmrC_ZHo0kYoFxeOEB.yFXz0mYGBc1oXd7mYZBiun06fmMzIaVutf_YqLZi9s4ldl11GyIJxOj3koFpsTZKVzyuoep9lj3pI4U5BA9.ZzLs.xIzI60QWximnUGcLHCXByKO7Ev7k8FuFwqlJ9jwp8NRb6SD_fsdkabywMK361f7hmKbfjUR_92ABfe2pemO0_pG8n3.Kbs2WBgErh17_soT6vF8yLqsK.XGTOmdim86Zjvxl8nYO9VZuQd4o9KQJhHQ1txElolIn2VDliJf6XZn9ndITm30BBrZzU7lt1X.t906cM5.wEtdDTIOXEKr8wubzf6X7DdAlaCgi2lnpGi_d58EMIHjGswk9q5k8VBXUc9SQT2GTd6yLyRJHv89VXUVa9tTGYM2WsICDFnPsH0OFif6qK1BtUsipyycyRV3YAGqqKq8bkNjfbwA809i2brl1z4yJHx4DEZ3TsLVb7.IboP3U_MukR_Ar_6OLTAUdZQNZaq8sIAXm5Yx4aH8ju1KDYY7RdOzBCnevUodQEOT2mJDlh0Ie2Zags_ndjs.oLfOhGp8LtFLTC9gC3OFbmhwAvHtDlR1rsni0EppVbcHo5p4C7n0uVaP2redN2g784q5N2nRKVvz31.o7LxzevHL_HdrebGSV0WeuFDZS4aRxP81wBohTcYobW4NcyPKqAjCJD5cwuhA1crxkBnLlBDcxzOZ1udD8PgE4xOtQ1SG4ugz1wjRSGzTNxLbDUnPqk34k5aeUmy_Pzae3YmonEYuj1Eh0TcJN9CaOAcqgOnEeS80Tya..gSNJIV_Y4xkMoy8f.f1v2IbonUfbbYEJo_laVTzCpdqxzHOd4j6HTisbH60Q8KWXbCeMOvoh.BkFqd04HVtPcI8ODhs0IXMtTSNAwnVA8WjwqlLNPJ3vxVHRcI6tdBy86j.m2bCGTigm7E2IeCL2OyJymYD6B6DuRAe2KB9ZjLNwzQ0PVGm2arovyKbIaFYdt_vtHNLgQvUUtHbJ4cBjyVfUTbzwBiFKyyVm8ARGLqLqt2701jAAmvVGx3TZFKjC4lgFP__RqJAZLqLDAxbeI48OkhJqEmo_weRDKshT9sz61qVbI5euWMXTFLk6dVDdLSw7PDBFHJk15iVXrjDdD3lSQX3hwoQ07y2aZtBBh9OxClagplehvJcsF2bqkK6i_pBIK1AaNSB4d7gCwGWgobo8JGBsPfGizrGNmp1xyOSaG1T8vi5bH1cNgxZhCGMgD6zNIAkGtnP9AEsyf9Lnx05rqRzylcMSzNIgqGpMjo7cAKQekX.3qUyCmhUex3FYdesRX.Kjmcmekw0pLbYf7Z_jz64_xhyWsel23d0zBu4Ktn1vI6X9IckzO4aOPUHdQSarjPbabwUUrJVeszdfJJVPEntGttkRyy0cotCT3lN887vkHLjjS4QS8VCv2zoAbdawOyXALq1QW.BtDQffU9jMk2faY8_PKj1c.92fWQqI6h8iJJwrpyqsJVTGzwLr2E4YYY2cLRpWhTwL11a99y1XfWgFQq3wY3o9kEkloVdlLIpmJlFUpVs6Kewg0.4xaAUF"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91340203782f8bc6';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, "\/10013571\/json?__cf_chl_rt_tk=Hlz7T4oEeeV2bVzGkRSCMfbyYUowFXLwAoHKd1c3hwk-1739776753-1.0.1.1-fhN8OlTCTNVBg4BQd3625McQpz2vJuKXPdS3oqoPLcY" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>