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="390"></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: 'managed',cRay: '929e282e0a8c5ffd',cH: 'auR7O59tfF3RAhRvwXwmS3PER4g3AdPwV3zNpTJXGLA-1743574161-1.2.1.1-4G5BEvPehg9kz2A7_J_8tSgs9LZjBKJh1jf8gm1rfMDmRA_0nq6zhBbRNF9NkAcF',cUPMDTk: "\/4096\/ris?__cf_chl_tk=BMMBv0EvxBqRFrTF8CKGj36rbrmpA_rHwJVoMPp.Gu4-1743574161-1.0.1.1-qPYrIYGvqSDATIcbbqwmKzLS2Au1iICwP.RGaDaB1Vs",cFPWv: 'b',cITimeS: '1743574161',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/4096\/ris?__cf_chl_f_tk=BMMBv0EvxBqRFrTF8CKGj36rbrmpA_rHwJVoMPp.Gu4-1743574161-1.0.1.1-qPYrIYGvqSDATIcbbqwmKzLS2Au1iICwP.RGaDaB1Vs",md: "ELYH8bBAr2UIfRqBVJnOVML7mWxPBl9Vzkfe9KCHRV8-1743574161-1.2.1.1-eXlUn6QjU.IYfMnxbFpvM.8VVPx6wdrezmNH15tN_khu0ZtDnaktf3niAUZglsv4EQjfyczZBmejFBBi3hntSC4iw945B8IG9L5mQrAECpl0mqVGY1e8YUjEh4eCHu60Nh63fyaGFg8mJO2NxDHnVmly1lZIg587t0MnAntaa89J8B23Eda9GPUk6RYcwPbsnwGkLIfZqOwq.H6pwWsbHqeo.mw6npNvMlSK_HNSDgUSdtC7dHV0XMKzOe5eKjCONuIyUZCIWsLbYtYyMI4FYCkm91vfEowyoiN3XAV6d47oYj.xa_BNQtWDEgYz.LXqd6HKKX0ERu3.xKrCxD6iy1rml8oY4n0EhSWp_Lli9DBwju9uOXaJ2rDl1fy8fHj7Vpy8PzDdXKmS7sjmYh4Ye61FOt4H5_4Zz6DURjeesycCNnzUnl2hsr2FHQI8itLt5P3cOqNh5YSweCcubvW2NyVW9F9sZVifvokUWRlOKIHvI53fiq6.RPJi98qBUPDUi.IQCIsmP2R7cBCqTbnC.mZdhOLJDbzbbvKrv36tVgHQS9tVE3hH2MvkqzrbyYXLTLV2e_0K8ZKvrlJmtMs6a1l8ZfPUiZfIlkR84M3g7xY2bRz.VG0FONgiNBpPlH5J0vzjkf8MJRXet3BhPX1NMEMpZf5ylgZL0f4ifcnr0teV3tL7yEvfOoy8KLygZsUfagGaZA.YCaRzduNvZfvgF_066eZKJ6kAm4UgStJD1zpj_CzQhbns9wwE2OXVyKTkoip2qfP57_qK4eDHWwvxLG500O4B1A8AvUpfa9AtacQR.0gXi2u2ELf.l.2yHbVS7mtE86BQyKh6jrUKnA6KkU15GM0fwCcVglmQUtMMskj2JY5FYvrNLoZ4xsVBe23g2kBtiAjiZirRGN53uDVvg3Z9avSDPnWIp52gctt6Iqg3Q6jEv4lqnW6vMIoCp0DroMGTP.H0bSz3dxkk2xDedzYaM..AVQWx2AlpMNqHjDaUA3hoWUJC592b8oemJMG2v._btZ8iw2LC.jrP5NzS37bWhGjRNWxhBDvoXvC2l.ruEQIvwZKZe3DiQdYhc9oQmLbJww9Nx7PGYMjb0i5suQeuTFcWli_fl._.4XnohfBzjW.C8uEDtU9yzYYplce1YYQ3sq6QLm9hybgfZ5L0u8IBikdwLxI62Stn.nYFmsdRE5Es7clTuLBrOiRhF15vbwWBe5fI.wxg6Y_F1SFyvA",mdrd: "lMllmwUNqatv2YqnaoACDBm0uKFCm0o8.XASXU1iSCw-1743574161-1.2.1.1-tz7R36u8vfBxDERDSo5yldbSYiT3YmuFZ73fjoR1H1YRsqnp_53v.DC9YpuOKecwVB2LixEM4DqThphnfp9IkT_CusnI90Q.yZUrE6FP7xVg2oNkALsbEAodZXMPMRLiZxKmLEXafeAtDX3XzpDcuzNH6.QZsmGm1VVpPaQvJpBSLRh8i3LM5OYfJsYtXpxTT4oREBasHQT6xSsQJ60O2.w2rM3GRhbZrIA9taJp5.yCR3.EGlgBJgyhjlKj18Rzs1rAOoQ26GzhqBfivqNpByq8.PwsWZ2DIkTt2CQGcVbcpSTw7Mx6DBEUnTB48GGcBK.VfbZHLEcadJvtEact85TPiW6tlxt4VW5ZICk7lJywbPZTWBZ1K2bBXRquvAeeqv8pQtPSx8lWkAV2ICfu0SN4lH_bQCL.Jkip_dWTSSyDIjviE2uepO62RqWJ8PHvbqsSR_m0EAkPSZB4sWn27kO9qX6WbZMqVONO3froppNNWBIwz0g.U3g3nmxo7olxW4bPU4rVVGxvHrflhos0fIhxwT5aV3l.a5.wJSjAj_idnpzEnGqZrGsHbFz3evmgWMFzB0WECLVF3pJ3WRJkva3hWEjfF2bmw2D40Pn_EapjvyDpnr6AdyTKI2uX2oTPhJf3KlkErQEOWdUDrWinH9SB7UCJS3b_fLZ2TEkzWEBtkk.ymNwR8tsInKKA_J1bm15pTyLC0aws1m3xtLDySfoWLm535e_GrrZAJHWq2dK.Rje8FAyEa9QBUyDPwLNtTII0ovRzkK2t0oj2zLjc9R2.NT2ywnYfU9ykPp3KjiObIew7mOlcH1r_LL__59NZ1xa_2uTHHtExtV_tGuS.6_uvgJ2pqwW.9HP6h7Kr_gOUMgyYYnOKTx4y1tW0c2JV_zmUS8wyHcAvLq7V0YKXXtYgYtkVz9awAWMlgpXxAgLdnLbuVEzZTGtEsqHZumlxkfX63sV8LfGpy30iHbvd8jg_OD7O0_Sh343Bx6jN67zvpcIqdYeSz50hqtZtPgSNegm26UBKenKZCclp2oc8zXU4NLBixofumpXqQ9KZiLqwCICfGcZ_ZXGyfFsrr5OxzUk0DWydAHTG81OpbEWKVuok96FIUIzOwTo3WFIT9030zR3uf4agdlSWRhponMSrz9De4UGSN9eUTZx.2viIqiw1G4s1LHA6ztpqI_LktosvAPdXhl2rLbfJ0c3JBf9Ot7TWiq4LnKY5aaGwN0NptzKIaB3siPDzmPKnxvvr0aq143aukGOweBxX0VvFZ6Iw7SFfBLlwiwq3zeWBHtyhgN6jPhTeRVtOp2IvT233mmC90Ap7A2q3Af.FhrT_bMMwNkEIQLDuH3v81bOTzxv7kE9Y_8HTsouMHh0whPTfcjgTQ5Czz5MFbMmnZk1uAwpdfZWIkyn9oWNo.GcT5Epy62bG139BLJrcWOpccCBixZMn39_J8QkW32ii3Ye0f7AK.5xj47w1ilAGpsuCbXZCsO7TBHiIaj5Ec1J0PUEAikMSBtL7KRXSPszigfNAVUZG8IYSOpFxoO7K5UvbZIacPj88Tw2y99UYhUprmMSmyiS87XyVPT1bNsohoWlC6_bOc4EP_zCB5dFEfPdRPVu6nDh9C4HHCgAnQ0Jo4h.AGaVEbeQ_A_2RIv4CIFyce4GU_zaoxS0TEFTKuE_11eN2H67cjtFZKzZ559TdLBhhlIryZriZAu5MZH8tLdQiFvmwpqZmlW_PJGnhwcsLora8FwApidk79e1HLC3bPlyROK25aa2uZZjoNfsLnEgjO2TcWrZwEPDT3qzpnQ9ynTT.QKeBmN6gms0PuEJMtYVpzmm5AnF1tuEl6UdXa46pxVE8D3vuHKkSK88rYm9GVGpcDMs0Jm77aUcL1HqrrJWmF9EG60ybtI3FKpWlLUqffZucqsXd8R5Lkrjbucxt.ODPZFrOXLinKexHem9tus_zIhBbDS5fMmSxabBzIbtNcpqTYiawnK135yG2D88r793I_Kgnx5gufttEASCY_lu1wZK979x0PlNgIDiEVYrNKOII2H_p6aOoW08puPArzAi7ow"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=929e282e0a8c5ffd';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, "\/4096\/ris?__cf_chl_rt_tk=BMMBv0EvxBqRFrTF8CKGj36rbrmpA_rHwJVoMPp.Gu4-1743574161-1.0.1.1-qPYrIYGvqSDATIcbbqwmKzLS2Au1iICwP.RGaDaB1Vs" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>