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,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: '91340fa4fab6f938',cH: 'CPqeOunKLWFR61nIKl95cAiVuNxKDKMLSBIElGUW4vU-1739777311-1.2.1.1-fkViUDQkGmD8PYa.dN4zyA89mRiRxOJwG.0ruy2LS5eIGMdd0gmKlluOQqQbDQ9x',cUPMDTk: "\/search?q=Mairwen%20K.%20Jones&__cf_chl_tk=u_Nc4Mx4_Iy7I1CZVLEc2GddHllm1llH29y3p4x5eyI-1739777311-1.0.1.1-NjPaJ1ZMHhSlY8QijdLGmcQQ0YtERRwdnt1qC2hVWng",cFPWv: 'b',cITimeS: '1739777311',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search?q=Mairwen%20K.%20Jones&__cf_chl_f_tk=u_Nc4Mx4_Iy7I1CZVLEc2GddHllm1llH29y3p4x5eyI-1739777311-1.0.1.1-NjPaJ1ZMHhSlY8QijdLGmcQQ0YtERRwdnt1qC2hVWng",md: "JwSSC8rBZtTXqjwyAtixoEPOManZIRQ310jIeiMPywk-1739777311-1.2.1.1-0fgw2Ke8IL5fpnFu16ZlfCL1DdJntp.uP5C321gsDvbaPZUFgDtqEw8jUiuwC25b9zD9.wr6QRDHiSg0gf4IXgbuF4G62Md5pwTBfd47ToM8Atno7IOdwG8PhVbGOTwJn31I.2wsAp1.RjF0FixEvtV2xZsqY8Iob0.3e2Hhvc.b75Klq5424rL2SYCv7xXpgn09pDAU.OwzFy5SSObuqvzJzDotyho_4zznBGnGQtX8s4xEM1jHOdBIuEepXAKFlgsPvN3S8uetO.KxSXE5KX41.DBKqWhYCFSH1K6Gwy8bA_rQJ4.zNl5he6.lbMBauNZEJKCHvl5tHuEW5WjG2gQg3W3CFg1RB5zak7R0Zn1n3sOIYq5d4.waSJd8dcXa1W2FASvLk5l2mFPnwI5yVsyXh_Y9tVjh3eHMn_pmkOhvv6kxLD73N4ooVOrAzN10Jkm3K8StWUdMNCXEppb2vK9b79o1ZwIute92p5i2pjpRV9RCzS5DO7XbvTOcr2eO1sPlKvpUEHlTTcPbM3rqIS2FAtJIlKhAYia8lMUsyzh_TQ6vE3t5n.pEQ5xjzWmzGGEYONYW8swWreI0hb4GLAbX5YLIDfzAczhhsUZCXTFtEGxY7hT0fSrjJhtWf09qdqGQ21ERfxb5CT68wKgctVBWp0NJ2Lc6GNLBqDBQg8dcit7G8zR.idXz27GrwxHjWakgeUyhRXXZZUwN7F9Nc53IivmZ4VD3e8_tpbb698PnsDbYYb8yWcU9BIc8vsfoZXU11z4muxyNmlewt6MK.5qDq1p8H0JfscF3lUhlmLY4wye6FX3lNJNAArBvOD3QyAl8x5VMmc507E9PIZzHZjV8DSybTzlUmsCl3c941zv.KPvenz2eefNcrwIL6tws20XQ2YLdEiDZxpDifrt0RHZ6hEleYm8m656r.F0zFkjLywMswW5EnJOMVin85JyybyYGCwysikThGxqoWNEzBrZp0VDIhaVYiWFnyuoQlU4uxR_2VvZ9x0yJ4MvhyiKpZ0loYkwPmK.BWHlUUiUwFJ6kQtrduVihy1nN1jLhg4J36lPh_XV5D6qZqFbhrkC4I2hYP9uyLhgFYp1jojDCA0y4_AzdF2mMDwfTUvJQQ0Lan5k66z_TSd3uSxR32MtCoreYfM.CpZAksvVE.UPXxf4xmsNJXCQxeCzDZti9rJWyCPy8uW.McWwX2.LxHIEhTlXvFbzGHbOxXLzkXLcpmIowCiGVDI1xlZOqb33rqwVLOWNuW94XYG8_Sc9kXdiy4gKF8KhxXerq9MljOUfcBAETDOv3Wj5NRG_pjmY3riIpCXEQqE6JXfgO_OV.aq3mvUhuGMkukEcV4cykLE0lntPpvFEBAKIo8tVCa7_ChCTB9mNR5yk4EGKqoC.pIF8WohK0FEqibIweJYBCFc7NkKBg4oYMGzLuuUcvtjEoWsfcRr7wLP8Qrwl_VULGJ0ZQYP56demWJsnHM5anXn41drgjonvC58AV6bS9wAvDlV4G.x0AlswntIzjhKEc6S_YSmbW8rQWxlezDNVSHn9o2Mmu03wweZiBBdQH3ZGl.DZsV8dDLkYsykT6l1D_JYkD1NaeB4Ekwwo1rHCqx4Szjedryfj05rESnuGG6iCy9WfDjtA50KTKdJTJEP6Up2cDnX73IhezX5l3.8MDd.V_oE3rXh7DIBms82gZ7UWW8ApY3SBzi.3QVEkIxfzeHfS9QYyj7eYPAdXVGuushh22gk6Kqa7vpber9m6GO86jVcw9pAwvYBv3SB8aCJa4QxTTXCWz_5DjFGITsiAHelYabnUZylnd3jjoN9kxxMTMSOG5qVZHvbyjH6V7_KN.dctTvC8iOKy8Woqah9gkzAbt66B66h0Mv2OOJuiGi5lQBw7zkJlFTum34ClZiK5uewbX6zJBEXhIKselAygEMNS.NA",mdrd: "FMxnuK5jQ55YQNgMTjsEh60SPhrQU1Eay2zwP6tVgYY-1739777311-1.2.1.1-cQ4hm5cWJkFRG4NrscYeNC0KzLSxPdaJaRwSsGhLKRvFka8Zb.YmWXWLgObdqxP319wrpl._3WkhB5u3.np9FqAsqglj.ClB4OH.eO21g4r7c0kA.H0lzj8.w1UT2fXNDdkMgTk3tmHyqMaMR_R_JDNstTdKRYPNyZpnFDTa9W9tqj26IZv8g.TVEwGxAH2OqsYNW5tyCM6lsGvwBnc.fGj_.90Wlv8Y6w9RGmuO5CjwxJJi6dIkGCN7JBen97x5sxgB0JmXrGsmf_UkWm_o87KTsIQxnUKIdypukEslKHC42qZ0k0l9e_ahO4YCks1FVXsL8dmxshNZSEZgfDZtaOf7ne3xl_M_Rh0JFraYxrC0mOL17ufPUxnFQzjIZMkGLg0Kig1HifJ7B_zFA7d5VpU2w8.zYCKU6OS9I.YwaK6CuYMtNiqr75htM5WQMG2ma7UTveFP9FQ.IHaoG8f.vUkJfrF3rbmO9th3q6Q3uWTK2OEsX2nmkydKSYAvZAWZ1vjn7n24J7g2ffBlZxpi8.7ebfi9TXpsomUgkABFG0FKzPlyqKv_EeduBUlbo_FrEffR.3_vCUc3pQFu1r1ehiLqVyJUxrobCpilxF5jUOh6OIqyc36ItMJnIVGDafUZaM5AEgGD1y2U8qN.jH4ugM4TE.MGX70NU2RELwI6rn6kQ9Hcr0uTdBr_cG17JFwfWlh9UnAR5D3B4E5rs7SvVziSLWHDUf457gAVA28DGY0.x0029.wCqpYy1Q0kcJEbNqWgTsqyuHuQuBVZ0Cz3DfCwjD7TNh2A16LElwZDb8TT1upzjltFgp4Rxrea6kWdsTJ.YYICXo3t8fqcWZFhSKgat1sK5qjUsDZ_Fo.IErk84qTZHQNTvz9k6DrKPOLZh4jPvJMySLqeMlJj5M8FczeNR_63ONwk5Qgj12SPN5OdjHGn8_V0eKEaCK1rzMZ9AHX3Gb_OqCJz1C9BKC4kXTJnoVc0FKjaLXZy3mjA0wXaCYJbs90WRCBcCAandcp6vm5H5Ajo95Ke8kth22Nj3_qJs8ci7GTlWxcsyfCjAPhozSqN7VqyPJrvlGujoL_YvWrUqv1jnFRpH6yTtfRYHmwrMKmNu.ZP4eYPj9SHwUEBs1DwwzY1MA8f0WyAXIR.HxLPFOxSXqJUd.aUYMf5VgtWNddp89n0qyHFIen6tim0w7xss6iH._Dvkc2NA17fO9BQcimGG1wwbsmssiR3FyEKODCAiHhiC4ukxJTdYLobSi2BI7_l5eUOhsObmYKR00oVLL14fFCOxOiULrYsdxfAa0nJ6VhDoD5YbmE9Rk.M6g_..vXglJycO.YacqrL_9G9N.zS5xCnralPhjbwI2L9L5i7FZ3wKaFI0dhNx5I7d_4dRtZ.yfYv0yNIqNQQ.PnTOypalDIedaGXRG6TT_cFbmwcmix5L1SnkqrYS7TvqwL6qfdLIwwSdCHSOJpUkciqJkORhzBb9aTRaM2G8mIVIoPd6DYcSM4njFEePkZ32FqQf9b35AQorbdEMUeHJVo_9DK7_90pTpZr7wo44ugFIkM3yNfsFOkPtYQUeYv5I8v2hx4J3O.0ICerTA9eB5QJJp_LjwH5BTFT9MZ4VJ3NbNP0hrwg5M_8nlRPshQtbvBzmI2ElXhnFFj7hElGFDjsB4Sle3uDel3G96q5bgFcwSMFL7A9H7AzHdKSz9CTDxpXGD28.tpAcylq7Q_kh2epCCKcp4lYSfiflnLOO0dyfcqDUJNTnJUNZOCGq.n_lxLltp_pgDJuylF_7R3cciDk9HogTjLCq3MuLJ0K08SsFD39CPfuHCHbzYM66HvCVqclLrlP1S_ddg7wjpcaXTDHZBc.bv5k2lPTkCcmtYmPtqkvTEoqkiT.HFwLwF.39okjCX6KLfSxCLIQIIcOZhTyOzPa.0GtBXAzJQ5qWupf9Y4HenFqFzyUVVq7.Obf3x8xqO_YthsJFd5KC35U"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91340fa4fab6f938';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, "\/search?q=Mairwen%20K.%20Jones&__cf_chl_rt_tk=u_Nc4Mx4_Iy7I1CZVLEc2GddHllm1llH29y3p4x5eyI-1739777311-1.0.1.1-NjPaJ1ZMHhSlY8QijdLGmcQQ0YtERRwdnt1qC2hVWng" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>