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: '913551ae7b479b9c',cH: '8.UFm7dlzebg8b3jBn82O0AaDXvM7_RYf.0klJYdXw8-1739790502-1.2.1.1-UfB2sqe1fiBteSv43X1nb0tGBLXfWk5BOb3IzRhYpRh8Im5r9Thy5nx.sba0_Qpy',cUPMDTk: "\/abstracts\/search?q=Ralph%20Vermeltfoort&__cf_chl_tk=3lsNs.kboi7nTqIIh0WZqSjTTFQovinhV5NNaEdzkF8-1739790502-1.0.1.1-h9xiNqYX5aVXiWMMkuxT7e2g.uzKAc9l6TeYlDxEEjQ",cFPWv: 'b',cITimeS: '1739790502',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Ralph%20Vermeltfoort&__cf_chl_f_tk=3lsNs.kboi7nTqIIh0WZqSjTTFQovinhV5NNaEdzkF8-1739790502-1.0.1.1-h9xiNqYX5aVXiWMMkuxT7e2g.uzKAc9l6TeYlDxEEjQ",md: "MLRJUUG.TKS_.tNB6oCz60_BDoO_J14me6sxAkcLUeA-1739790502-1.2.1.1-2rhylhZwORW8LshejpDVDGvm.jjdJXA2IJwmq1jQi0rphxejM7QHD5zdkvHMN3pDwkcJ3HFGKZyQwXyEQM80afcDfgSwY1zpoV7snegB2GesAwKadMPY7sZHdGWcZtxB0fSj3FMfmDNx6lfVnH6mem5CxCqwSWlZPBib6Wv9FVIhLsncv6MAEU3U9I66ORtehA0oFOWPQ2sVfs6HhiRA2PVofhk_4PazHo4eL.vy0sb3zAluN6cmDGR2OLNn1VrAJ1xIpM2zna1Zo8Z5Lh2_gzdJe5qmU9G2oEgE35xfF8n_VZYa5WaVfm4YuCW_khxuvmZUlczwusD.FG5UBaCDIDxYFyRQAMDo4MUBm2lin989ef_G.OyvBXWBnN2YkV0su.yYhbdxYNcGxwKnPXrU.WUeOVXfE2Udk7w0.zTB0gNr154nn4Lv2WSfttM1HdtpeH0aUyO7t_8KmORaIFEYRisfwKUFc8FTWJ5YnZXO.U0bNO_D26b_AUH.PfWGmif5_2Y1y_jvjWPN8QuBDpJfd6i_Lz_ZBdJF0fz.eMSLJVDfHwsV2AI92vCyabWPrCcUy4mhBsGhYdSQ.0._G9.I1mKpMqLDjl3QsxWjM2Kyi5Magf3sXp_zuJHVIam2UCtLaxhoceDsNR3_AHWp8sYmZBT4NchpBf_D_oIVApIevIWhzXWHN4HsuuAdxnZpD_kOyfAKxSjOCAC2QbALTngelU8KW6wui7AYZgpBHOwJqKprLRvn4IDldS3r.HDV12WJIZpypeAhuxJlWb_0wlH.l0a.xT12G.Lkjk9XDPa3JSLyv6e4LeB9bLIclPKPQAkOlJhQGAJ4dD0GA77.bRpRxjZU.Sr5h_jnVCtp1YXTtLFWxPSRbo5Wp0HVwyxBEy3SfMC15GApbyzm1.jAxdQ7YMKePOF5WouSlv6CubhUKQQHyLwyOlqpVCnl2Bc.D71aFKl9VpOqnpzlAerAn9zuJrq0uwAZIPHSWTVNnNIIzaaBflYZ8rimmDY0cT6RUZaE3G9MXMQK7EALKptBO9VWdWQnQsKFs4m9U0twg9p78LTIHLPC159MUgNqEs5rdI_S3z4tAo_0cnzNQ0GqfwDNg7L58K6HGD2vZp7unk2I0cy75rXuEg0Xu9HMPQ5Z5UIIkcGKTTp4GFsaTDKvqjelCMSn6ex9wCOz53gLc5TngANAP2R16W68ndAifPn6HJNk_Uz1E03ozGXmUYsh9bcqVjTxBqAJTMORHq3sQCA689M7hNNgZEEmYdvxm_UryVXU7O9cKVQlBUdKC04LE89qWQOYYE.keRA3yFl.NzLVzu.yh9wxpsURFznFpxR8agN1HlM2hNuYWC0fg8YntFlaSwkZeQ9Jf.uLKhXcZynL960ERM4GHyqeiX7WHpt_msTQ4do_3KLBbJcb.QMxDwf2aQZgKfRekCUSWiZFN90e8NBcWF7.4iXPXoVVRJSA03TlOiQp1qYRELFlKLiPSC7Jjja.vCZBgB0av.QRhWynPncYdFthvXC8egSdwWe0Rf7WPJLuHihRnZQUK0Wz7Nnjm4lX.C5PxwU9DIU.AKsrMYuaI.AoaWmZ9SxKEHtmm7ORSISxgI_BAZ.fv0KRghy0u.BXge0_dNL9ho0QtDlQDeJlkgMUN1JjAaC9b.WCy3IUYz8JkmH.RhOrG3rgKM_zorA7UHVcsNRtiNnEOZPx4VrpZCEduqaFbtZMLOYR4q2dpoCArGTNvZhhmbZGqs1QA8BZ742lqEmljeeKUw.hClGRqqtzIS5OIWFbL34W8OA2nmLYbReTL5s1uIeOKeGmnzKH4voDFrNCASaaAwnX_iGKMekYJKIlK_smmwlbIg6ABFp_9D9nXO5m40qVCvvmOToHobWQF_c01z4CXtMxUeNWhnjIJfWOsnyHCugZSSS4tp0KrN3vsdRxcBEyt6rO3tWhtzvbtyXGwI6EJrWOFEI",mdrd: "1CSqyC.QcDLnec4TWLxDWrfp0ReT2ZXReBTRSGBsNyQ-1739790502-1.2.1.1-ojT7aWXNkLh5OgPn6o871lLOJYzgjz70eo9RKNzZo2wUIWOaZJHKHRK.PUqtnCPycAONQyneqOy1wP6gY9UwgFHBFX6Qb00asBiBpZfYQg8IqpUf5Ao.RBjVTxtz7h9DzPQ4XsoA1GMGQeuf.xtRu3St0AZvqjxWI10dPCrzVPHGkeb5FKk5pek4KL1ejDz9on8POkd2PlcIXvD9JilEKkm6gUcDE83YmLjlbM9IUTpLFcqYIDCXX6FwaRaBURZwqH0Zxmd5l92KjtR44Px6cQ8gl_yQnuuzrtohPpXBjUrrF5MiV1IRQT2o0aDBd5gHqfL18U8KlvENKPW1iBEmsS7xG1aXdSNOsoAwRtaSurSJQLDjCMXUO005d_2Pfziyxf1VHQCDZKG4qq4urEaIeh.exdD8ChWj4ZAIxvbBSb9_Cl4UZbbPr0.W__6FM1zGPt4bSRmkt.pNWq3AWHSNpwl_s1v.EzCDk8DS.v.1qedstOcTm2Ugq_x4ifg_P1iHO33h8R9E0Yco142TPZ8dzxjmqn3reHjII4dSm3yIjCfDzg5hpIIkahKydN0TS7JxSMnqA09GqL9NH8XvcgfjycRP3LfRlnA6EVpc8D8PGmnfbPhqdtM_u7yTL6UqjYhT8BI35CZAt_Pd9i7ph8lXPnYJ9Wy5e7KrWNvl3QjDibJtzwbVT8usWKg9i0vEvg1gLavvh57CkB2zLSn4Lb4gwHD9zHPFUvN8K.qeRGZ4eX.I2kbSuurSp.e0YqU381.kwymnsbKGRCSMdklHYPZG0S7oa3lr0Xe4IknNrqssJlQUNUFeMHUGhzJ1ytQ7iSJrRVtw9cs6yQojuoxTp8C2VGywnNnBB2Rr90ANXrFivF.zrpGR_wYLOqhWL0Rebjt3quaEn4zrJOBUrz0M2CW.wno8RdbqvEL0nOIaeiy8imMTdie94cp6fnA3osznYh2PwatPDN92GyZ6syHBXrAE_CIrMBu_8Q9F9p7syMNCW.mBYaRopS2hIFE24cQNa6pjItvYzdNFa5L2SRmDbyXWdi7tuo01lJqM.CrTbSqlLmPZMODEcHJdFcmgHtGv2EOwzkJkrCeql5Rw0h_wZib0pCDOMImfDoCK8V.8o934uWHUBLl0JrudB6ZwdRZUSGsIzyy5Yxy1cN2.v6rOS8pPorMmVhBOqfQjcmIhR7wnzLm3_YkOeupMn6i2UCJFrbqu3xK.ETwPYMSthS.c4hNSwWdoJVVMC1.VEBvt38biVYoxlCI4Wk3GzHgqWc.I4tSLnm4duhaCyXogFtNtVaod4oGviCVzxwSFoUDhCRJ1nY5sChNJvedX3m.K5Sg.xrpAMWnOLbh4bEdoG4_nTbr7_YSTEV1iJsDKUU0K8v39QsVM11aH3UDRkjNTciz_9eimxgMoGIvuWPsznqfjF2FpdZFsoU0_IShuXGra3s4nj4nOGyTEhqfrtbw3DYc8hB5xJyDgJR16gjyDXHgHJYUwWOU6_QbOPrrNp6Se9TCHKcRUfN.1M6EiypnP6CTP4EvBgSeDKQ9yd2qbZAiGJAMi42qJOjEolDua5WBES8GG7yHTlNWX0L7zEYPQHbqMZrFIkEuY.POXSDOVHUm0kGE0Ajjk9hd9tfMYNcPMVemgPYXw2O9QZ0hCTYHxptFkRpxDaHhtoz4MWBX2266UUJizOgyVmWokkW4IkjudK_SCU3BK9WCfg94NEK2J.aaVtGM.VRGY5gGMM7EBgz4ZcIdQQ6gEW2VgOmuoNRobxtxmd5J3Rs_6kXK1fvUcGSMAbjnba8P8GH4D8VX29Pb4ldX8XTJUAWhWt.MIAhljdH9yB9ZJDHhQKk7qXHUC8pEaco0q3fsH1390yrRaiZd2IFSt7McAN0GZaUDMoLdVA8G9Z1xSm1zAWlckhLsZVEgDLwvKWlcwuser34dZaIrgWyQMuy3pYU42DyxvUwmvvQMVJ4PBZzF0raVXJ0oEqsXU8YeR"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913551ae7b479b9c';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, "\/abstracts\/search?q=Ralph%20Vermeltfoort&__cf_chl_rt_tk=3lsNs.kboi7nTqIIh0WZqSjTTFQovinhV5NNaEdzkF8-1739790502-1.0.1.1-h9xiNqYX5aVXiWMMkuxT7e2g.uzKAc9l6TeYlDxEEjQ" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>