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: '913551b36e35896a',cH: '5HIGdmzdva9aPRriFZ5HS1Rm1FtcnBO56EFYi4qgBYA-1739790502-1.2.1.1-VxEG5FD6ilU7xu1I9epKXhgcgchj.Fq9TXoPdlSbwEPtTuSAEwHiyQ9sNIWwQT6H',cUPMDTk: "\/abstracts\/search?q=Simon%20Harper&__cf_chl_tk=fYohkkme76guihtbVasJSDZ89HRGopKhO6WkFBkHLrI-1739790502-1.0.1.1-4h2AHu7jDi7qKciYHm8X5jzto4GI1wCLvaU801RYdms",cFPWv: 'b',cITimeS: '1739790502',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Simon%20Harper&__cf_chl_f_tk=fYohkkme76guihtbVasJSDZ89HRGopKhO6WkFBkHLrI-1739790502-1.0.1.1-4h2AHu7jDi7qKciYHm8X5jzto4GI1wCLvaU801RYdms",md: "X4puSoHl7V.C3cYh4dQlU7XVWkHKoqCzADExRFfRy20-1739790502-1.2.1.1-WLWO7sknoz5UgJD1N__5ymBwCNJZIBXi1vtRSVAhPcfka2SUqPJX.HK2FfI5yqvuP9tH4o6OEO6SzNaGyCq.5Gb3MOME9gBK1JumnXq4G62pd7c0ruXSzZsAO4HyQuVIC8d4MdEBBjTyhoPDE.gV.juDC9gCkVc8tkLkNB.uRUr9MA3nXy7IsmTjEBI51GT2fr4Ngky6hJyMXjkfd6_Ny9uaHnz1Kp3gFEzv3TxRX_n_V81BrUGnYPa6GNy3czPbOtVQ5753jpkgHsVvyluv6BuGJvcKVhPsV8FdnIcrpML2qzhfh09suemrJtHlnHeja.aYlj8M8ij.NaH9O8iQxenbY0blX9lhLtjdyOugtzOz0_3puuRozTCVmnoZx1A3QTMwfOVuMnrTA.Fs_UH.xql4lHStOgEPtaY5X0KEA_wUPzHHVUwqZtVm8tCFk0wU__wxL8Ou.wMF8gGYSMTahKpRdM4WlGYNBZRHC8HjabPGdGuwZTM1llWZmH9vh5gXiTqUyAZzEBISfINS54FEKl187bf7ODakowo2rYzU6ZQUKQfF.jpTMil2V5AJY5W7tYsPqBMVIDVX.rZJhDQS6ifZZEthIfdEn2bX5mW5sb..1L6hA1YZi9Ywe8UfW73oukc4c7YoWeuLOJ4HNO4mU0mz9xf6x4CapZz6YsSX4QJygJ3RzUMp_SHPToRnz986cr5Y3ul5OL99UQYOzLY7OhZrni2V1cL19GmMKP5R8aO98jrDw5ju5jeOKNBCVNQq7_J.AezmaD83VL5b1ikjhH0_5fPneCsxY1C.q3K1vLgOQu.1hNzkA0yaXTC9ihNqO1zvEVueX_wJIglja2Ul5U4xmWeimKRgGtT8SZNbuf4k.Q3e6GXMOqEk_15a.PM.vSqOC2jjSpCSdmEkDwOwhDBXRt6MnMfwF7ATaUCMMIHjaqfAr7Gj1Y.6jkMykLW9ZKsLOGC82fNlMvka36lyM6WoAmqaTSAyFahgug5onrgDWmkniKEPpY__qP2q32mm36XCUUljP.rVtLVC0NXFwZiRGiUNKJT1BAVu61FJrKDYS2bNrdjB62OKcfbWXNb3dFUiFSbMJUypqq13g6zyko0UCYQnkf2fpC3LFolgq_ifTwog8CRdodITTIxq3x5cgxIg3k5B_pDE0zWNdrxxjU6C.0.QmsdtKaFN7pwD73R1RAae75Hzq6zqJv4R9dvt0ed2kgOka5N3EN1qEb6pjCrYB7ewM8pYRRExVHA7jprDh16BJSwJcOSi0lmUB02YHLtlmMuWCJfwSvF3YYErrdi0qGNaHuw7YWU0yU4l5NAW3H.SiiuZA0EoQu_fvopiYYFCuYeVR5tqk9IF2xi2MMcX_xaEo0Rwf7FrGvYDWNtj8wXtGJ4KgJF3SxiBz_r5tTkLZ2WhE4Zpn87CYnRprDDukTe_0HHgjYs_X7IkemDlhLROYIylvAc1jm7koH7v6aw.uiO1rz8Fh92DCv63DCXc_Im32122aCYenu1uoMi9ARtWV0svnMaUb5iZeRbomVJTBcF26F0PatdFZ3NMt1etfSphraebhez7K7bkIi9nDXN8Gwv2GHgCVPguLPJTglpepJdjjcAWu7bWq0HdcAU7CQ9tunTwokID0hIHLV78z028V4vk1809WwYICdOcONfvG5V87W_fa0hju8zuabA4GXp.8hCEqN7j2PlDFYPA42F3f0sAf_FH2SMweikn9I24vctqnP6qmEP.RD.AnU.rIez2iIYxW0AJHa3m533iLOeMUhez5JNx83.92ijPGlQyoZKes.YFHsj6B4D6qBKqXfs_FsBqqM9yzrhWBGi2beRRMHydD5B.zllp0cdalfIFEHicRHJNqQyS7GuiJpV76fL_SIFJVcasPDxMq0RajlCRbhTcj6RBVifKSDFiNqcxoMExPb8vlJ7s6tzU8hoTQJhMmEpJ135O3QCiG2w",mdrd: "V6YfDIDQr30sxtqO2SNNnTl8IABWPYKcUBmBjS6xVbE-1739790502-1.2.1.1-ZE4a2gK9SMunThBrKMcqkM29DXY2VKf03s0EDyyH._mhWlTa2z58eqY4UF7Ak.mt59mQGFGutLnj5KVJi.l5TG3Qwbycf3yWOfVXqSdJzdwsT2aC0xbaoRnPeKJ5cD0B2lVdiZ8vcrLUMQVlxMY9eprTsURMna_7uQOH6x9tx.xGmwBYk24EnMFnM4PJyOc9RR.mBbU.maFqGe6KpqqjsF3B_uXfOsQ1D6LzU24HVZ73rsrFegVmcaQtMmkAj0i5U.QyRbu6QBr1SMtja171r07hKoIoNojAPlsS_ng725Gc10nES2gBpMgWFMP7x5C7OLcL_i1uwdME4GKMaCHav5Qg9yILqMDuu8S9c2jKiPkH.O5XyG6NJdhzRXHPSJAOUKjFruy17_2NC6bwyDvN3gDF8eY365nYUEEHwRCvKy.DwUva2SOxct3fulBtMjldHOWiCbvnfBqLdbpWdEP2W.TlL2It2YTh9yvlTHU3YE7ZVpLeH2mqx3Wl6l3lo0P8cWEbWcaAEXQ5KoFeCDG7EfhyghLyRZcLXZB6CmnlZ.JJaxLt6xCcpO5nvA87_Y4zOHXA3jR_t.61jy18wGC2I0xQtoO1M6R9ElDsjKJZ5l1MEqi7ZJciV211kd2LJjmA2GDiXtWMw7zRLTWx3IcFVvL1EG7Ytajsr_TsMkAMGBc7jggwyOm.Jy5MZwFeUEuheoFzbDtmBYuwCbuffDOSsGv6W3zqm5ILwRwxkHaDRaJqgoMC5cHgZtzcIeo1s4MiuPqZlSpc.Zge5XSSbnbCV6LZJBzJZlTpBvSL4cbF78rgz60dXN2lVAPld1Ywv7ggx23QdZ4KFGxOqn7azxjXczCJu7QsXJi2SRnkI9PHt1dDwtoBV0XqDoj9Ish534EUPJvgpgGligAfWaLBiJgzwWb7ejybMbLdICATmJjZCCLzXc7.4s_aaUCS3UtYWSdlzzj6wcl29nwpbDNOlp5kYkGEtXTqtFDVib04pubJBsX2GmJmEjRb48u59DCWT.2Zn0eZbjNNvUIkW86tUa5z0G5qfLKJC7pUgQIhxSqBwiF0WpRuuZvDr4ebgN1jXPu2Tu1Ae5hTmaj0raPlAF.c6CjKKTxe4l2x289OxLvn41fP4hdwnmAZPCMnZG.V_Tj04fXiynGyA1F0r3F7gD_kjToPhK3e6tjhNCObnSMusuoZyD0jSxi_0a9lgsBOnMQKhUkFscOrru7ywSZIOImaV6mYpa_IG2Vp8nkUCAd59s5vfJE6EOOSw_.ZtVsJjn23fLAeC7H9knQ0k51grTDtzkhjOOx7hPhV.J0RQKTfJi.k.drX9h2kcnIQii3HIvlXSynWzbFTLd4T2QEcrq.nNiSJ0cBoC7OabhzgsvuSCH_kXOWMUJgIww3D9q0kdNTu2iEMaVjxU_gl670BTgDjSseDMbevtXol82SMwvVKz6xXA3NwgZOno23KzjX75RpJ_G4tFfJVb0O.CafflV7dk369hjQqIl6ujJQlSt2xQQVBRqFwwXXGL65lLAlG7MMjlzruaOLRmJI5tW7r7yWhhfq0RYg.M52rpSouG9JaVG3a5qwKliJj1O.Oz5zppE3GcSrerLSi6I1LFnPHhMMgNzfDOmN2pbR5A8KpMgEqkkqpdSmHQ.gEkqaFluc49p3PoD1ANXy6sNWflfLV6wWucjfY5DI_AyaNw6Cvw_khl1KMZWg8lTH2CqnoW9aEUpsEzHfv.lQ1j5PWR.oVEV8dJeQ5797F8ndOBaOxfQ4TOdrhunGE0ZQtad9yTHKCWM6OrbZyjo3yMncx0iu8Keo8F8H5BCTHgRcanYafTD8Bao6Zc4Tbr5DHSyzk4nvPHef56VMRfA3dCMPemMNN55b.H1qUSwXQXmLibOIbQQCkqooQoxMx_dL4GfDkNR.yAn_wE4unm6AYHOECmHE_yDb7thBpGVGxjJphnit8ueEiiOxonWcOfVX_P9oh7sLyIMgJmifdT0mLGYedaUG2YGsUcw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913551b36e35896a';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=Simon%20Harper&__cf_chl_rt_tk=fYohkkme76guihtbVasJSDZ89HRGopKhO6WkFBkHLrI-1739790502-1.0.1.1-4h2AHu7jDi7qKciYHm8X5jzto4GI1wCLvaU801RYdms" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>