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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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: '913660da6cb9ab5c',cH: 'be7gJjo7qeJOCsGsoqgAU13t25itiiIEqRQP4Hy7Vyc-1739801609-1.2.1.1-7sTP1ho7p0riYpg5mjng8rXJVK_EZcJLnZ2hyTD_0NvrU6TtppUyqefNyLG78JN6',cUPMDTk: "\/10009317\/xml?__cf_chl_tk=AdLOFCotLy3Rhc4ydOvepl7yaCazKVWoSxJC70qITVA-1739801609-1.0.1.1-EapWJb5OkyCBzyfXyOGm73VRQHkZtW9fqu8OS9H7a_k",cFPWv: 'g',cITimeS: '1739801609',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/10009317\/xml?__cf_chl_f_tk=AdLOFCotLy3Rhc4ydOvepl7yaCazKVWoSxJC70qITVA-1739801609-1.0.1.1-EapWJb5OkyCBzyfXyOGm73VRQHkZtW9fqu8OS9H7a_k",md: "NMvfrmq47.E9iA_0j6sJPjZhEQM6jAgigBYe56zRlqc-1739801609-1.2.1.1-Pw2klEZ6I1ZE0DmeGlQmELrW2x0nF3zeMDZ0xd6EdSk69I.A7joMXvQ9FSjs8L_F_05SsEoEdadmz1WPZB0cEhkSBT7uJjYLcrH4RDpV2GIxzF7R_z2WSps05hwgHDoI9TmYtaenqsxXm7bQjGu5ZPe0AVlR_TAJIOucOC00NrbCC4PXPFAHFC.T1IFlRoLqBJJK7PZiWlUrx1K.1HiNIo4QxWeCakBWrZz_1boZNGvJYYLDAbLypHqvH3Db2aW5ZYZrXIjuuDt5qvGZKNa_Dli0C4ldsrgRP62OTjlehXHRZ9ZH1Ea9AM0oxglSi8X5KmJPTlHG1SBkFdtjmpUBar43XlZZvImpjo8urhLFWR8MqrLFmZzM5XubBzIAMihz9QNgpQNABH.TBkO8dNBg1E4c5dGkkJ14pXSZbfoGMY5cZNgYza0vE1S6bE8YriSdJ3pI8YFpGQRJPIPyIpO8BLPxfFnXKvtrC3Dwu2xfcutITi3jnYG6IJlDSNMt9sYnMb9_lgnqAF0VgIYlkBbaZa1pr0.631ZB.xjXdL8.GeNMKKPUDtSWcws9xi4ZTelfgcMxLsZVpd4S_2XPrl7Gj150lQn3Wt9NkKired23QO4ENTldhMhGkV6WVT3Dg2PqX7cPcrBrrDvO5cKIBt8QYyV_CpTyoc7zZgEaCd2WRJD5.2CW9AV5RZdcsmUhUiV_hHmM6W2hQHFF9bsp1SH7E3BNWlOW6vo3knbodYTEZ3.Eki9ozp6ibLZxvywLBjeRv6oTBgJuzxdIPBHiWJkFlYxTvgPQ9gvdCe5y3kAz0wIElHEycFifdI9bkzL0Px1h4u4E_5sQoYQQZmsaq5etYmZB3UZLtXYL4P4FdamwtABwGykH5b39dlb7y4HtVf2OeQgbI1lcs4.oQctNnarlREV_guIHF9Wlt5xmNbxz1LpY318w.RuhL7lJB6ATvLaxnYEsuB0SOGAFh40z2Lex.m6jOQasbq4YDXA_pFHWGhn1ovjCsCtJ3gcyTOmBWCQzViD8nmyGgmtdTCOUC.hvbrK_hjy10T8mlwC_dtyfkjPJUs8JucjdcyVD2l67_TF2YMWKs0JThRrjvtxrAWprie4FVoxhEV4dGIP0r1AFodOX1nqxdqib8iHznRZBxJXpRcrRzVVNzye9Bboew4eAzcBjsuPi1JuwZ8yl2Qk7LN9IxwsFOcuGqMqkAHeeSgfQ1SQ4ohhfnSLOd3_ylMCTkK3BCx7rXPefNhQ0.kFJG5Ut4uzGe2gpDBHpHxIG3JdiHr3UeZQCZxDkUl9wtjCOchnLYGlB_hyp3xHFl_HEfCFOSz88cVFurW_UMKijZRleerWGfwYARkziK_vkw44kaPa7K_e.Elv3XCi06EwupMAzvu8ovLZOhHguhD9m2JWggXZEcx0Z1iOZj0RJZnUWPvAQ45KLBBIBFNLBxW6qzsk4laiYIH1M6uKIPCzN__T1HT3lMRg3Zg_1NhzZSz.ToSouVAcYN9MWmqEPQ2tGiPoxXV3UycwWpv9kamZPlXCEO2ec1jxMzKOdaYKEn_PpUK594T5duUS7yHWFer1Yx3RelZqumqj300HW.5WcKGJgystU7YEB2gQ8bdrA0JCk1v6EGdEHh0KoUtmpY9p6HtBl1cFaI3fEkVBcikbdlPYddfsEhdzfQyYPZkfd1LUkFUQD1vvX3r4_tqmqYBdC.ItBjGOhoaodbCjXHICoSY3C8xfLInisOjps_urQmOi1fDbEtUq9H5oBMpTsmRMl7iS2Cy.E0K8Gn.y4BCLm3PpxD6cCvrsZxE0NCwu3sPeVGuYigw0LIiQ7DilcaCzQid46qGfaNh9bruSzbANfpSomSc4PZ1.IztlUgGfiOCEBh.Zz0WHty23AhsKvp1zi4J4",mdrd: "FTDTEYWGaQmLwKU1YISWhFjGHbMibaR0tVQ4TKi5oRs-1739801609-1.2.1.1-k.MeyRaRkaHy1wW.csBmjWRidsuTKr8Bji2B6ubyU4lF_4.8dG6HaPvbcZM0Pa6V2Wn_SuDpAbBOcxLrAOIkgp1sDbIlm45uyijyTzrrA0HDAN42W0u27DY.qYlnqGIs66AbAeZfodCAfBgExv09BgkDPMPOZ9QJYQNKfwWYEIRqtwnM6sovEzpCISdeZsbSypFNf9I6QMS7CfY1mkqDnKQGTMBDR9ymksxTmqNCOdqT7w.G4akzQ3hWpE.oDtU7kM1liTXEg9.2FtLga2PqFE.MN0oExwnR1FNQxfdUdIIHBJsk8W5K3pcJvi3ZmcqSv9g4uBS3kmks1QnNarolCVon30.J.XxVDk.2mUkrxa8QroTusDJAxk.RCPdSFtJnCKgxwCS2.7Vs607tJi5itJuQlJCYrWP2zTiJuiYfuwR8umcOeiG6afM.cyEzhKm3g87gE3jMM_5rBeppX9kx2DqQ9IL7IbVUi7jOf3R1kGweqv_Xq21HYWw3JGl4G6aX_Z7HULzdlWhBMI5mr1sfNFbYfdd4nzvmgWgbbUL08545rt1UamTJPp5cy3Rn4A0AhnRb2JxA3qmdS5Lzau4UoLpU79nwzlqmhAn89sbl4gg0cy1wrO1dKhpUjBu59tQSpKtwPIvdJXpm6zaeUfUDuEfBfWhxfALsSzgghTGJCxQZTThjGMKI71RlTsRXtOl94lNrNwTDXO8UfYG4I8yHc4NhdMhsrw89CQkwoAkd.0LTJRTuQcILESsdZ0XcKguT4ivMUDRjL23Uz6jzR4yV1td24ShlUyTWldEUmcFdO6Q3Q7GLz4V_sYOGhvtslHf6GcB_GUZYb77AacMkA6VWkaABZ64I4MF8bnBNNtIkdz02JKqoZ_Xc8IpkDmHhWdNjOJ17Hr148BkFq133PHjwC9dzHAWj_oh3Z4Gw27eCzSwh1R3vL4KRTx1FgH5FpfynPTQo5uAsiyQ1qKs.M_IQ9epnQBWcKJag54eq1L6Q9ukzFknRvFxUKz05Rw0xwcE_nZ.9vYMuQowAvYVmuYsIheH9CcjVDq_NmEVb8o10ttWrjcuVViZSbWsvBfQTTo7adveFxYYUxWJGSsIJpBNBaTPc.L0qT4javmxb2BNG1Ysk1cgsdKb4LIUfE3dQh7lDOcda7TNnmTSsVTQozzNnZVRNyxqwA2Vb4JJtv3.BvScW9uhyl4YM1uZWN3B73g5J7TRYvdWFnjBLi.x_brPgGEmotvO466ZuPLaB3CDi_yT7ZuVbLXHPxbEjk_.wS316j0_FiRSIiR8l9cSn1dengQ.57KYNDM._H.sgCqZmrnpHFc2AV0BcE73lN4KNJsO0SUax0zIPBa2jDEhMakC9Enu7yDK74k76O.m4YQcLbpFc2kF66oGGMiKn3S3hPZctVky9x7pm5qkzhAg_CXnggZ8iSLYopk69VNGqZwPiEI8s4YTLjPwhwSHI_acy7Y6zIJzEueHJKI2wytW7HyCXdedhs83R0qNm98wHxZITOZ2DLayHis29ZP2Dsj5TbZGqNDVZ9fp6TbB_QI3cpCnFx.vK9wOg9MB34xk53PVDuVwb7uVL3eBXUryh156uwxMKwPLBrrRuLdEqCN6uTGa0djLEZ24mHA6hWhcGTo9kyQOh7AZVGRxV.NzRifeBYXKMoMD.zycXH4rb8GhWZMuBluMUPRHoCKg3dzBCKFmuouaAIIqL.d7_jG2ZRkbuR8NJ8aq4P5Riw01FJ8ORHAcJbLJ8Omu0tsn35OsEfVy3EJU00gXELjlrkFfS5IpP0eSLCtsMM3QcsPeXDYDwc.DyiBkmTgdc.sMUgJDVzR6Iv6iUAI56aAphrBr8oUZ7jZqJMTUWJ_lNs2zlTtydOqeR4tgAnIdLANTltPZmKEjbIERFC8kH4wot6JtHAF277nIYYFjgRjNKVA2M1ovR4KqwrfIfCT5usT7OMK97s4TrZrvDmi.ty5WwAtcrArwGCGzC"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=913660da6cb9ab5c';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, "\/10009317\/xml?__cf_chl_rt_tk=AdLOFCotLy3Rhc4ydOvepl7yaCazKVWoSxJC70qITVA-1739801609-1.0.1.1-EapWJb5OkyCBzyfXyOGm73VRQHkZtW9fqu8OS9H7a_k" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>