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: '91342b067d34f8f0',cH: 'BUgW7W62IVBwp7VsVF8qxskQNGaUZ0sqzKq_ttg8Zg4-1739778433-1.2.1.1-PjL06FqxvuHI2dwQk9YX6Sx7Ey2HqTSU_INtFRL7N6huipI_7qyDV8Zzq8nyw68d',cUPMDTk: "\/abstracts\/search?q=Tawana%20Keneilwe&__cf_chl_tk=2M_4zUr4UWurbmLCcPMKyAZ3aUD1CLfBgouv_gaaGmU-1739778433-1.0.1.1-ok.MVncPEnOuJHqf79hOH4FyV3BVawOiCCvKgGc2LnU",cFPWv: 'b',cITimeS: '1739778433',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Tawana%20Keneilwe&__cf_chl_f_tk=2M_4zUr4UWurbmLCcPMKyAZ3aUD1CLfBgouv_gaaGmU-1739778433-1.0.1.1-ok.MVncPEnOuJHqf79hOH4FyV3BVawOiCCvKgGc2LnU",md: "BT5CDVDHVEDR7JAHIV_Q0OGmfgM26jl4GNM9gaU9J6w-1739778433-1.2.1.1-4F0cyRhGrDuKPjch4nbWieKOMoYpwd1GkLM5etCYI..GOte9kmuE0zGePdiogMOXi.2t_7_7E5K0S.dp299yY7ZNzivzASWS1Plc.vk_tmmRdkHfG0WwJRuvzHlGlRO2GE.UXDcaeGT60QplynuEsa_zhr70C4z2noZYVvgfLsc73IiMTllQTKpk9i24pnU2FswzgLMbQX26IXFbR_A8NpSfvpAtiKmILZESCzi1kyO_OgTNfoxRRGfC.jvXdNwVo4E.L0INO4jQtDF0bONEfW9gcOQc5ewjfqldmsXijOZ4aVq.A2s8t3IJeoO1nuD0EEQV8TYGyuipOC_nY85k.VkH4Jev4pnFHVsort8jrCP3najw5lEWnoBvIwk23uyJ6A6Mqc3Lr2gA0faf2LMr0FJ3Ptq91F_XSVxNJSIa_q9uksSdugtwVtGhEmrKgwZ2Qe8o_qJkgbI_O07egScjH4EAmRUOg0tCuW2jTa6pggupjr1lZDp7pqjWXB44lsDJXsGI6i6VTyahYKoN310rT8IkoJJyHXduhp.wNW04d.QPGQFNWrMqExjGt2_2OKwcYjEl6tcp7c6uQI4PuO5IqiUAsLA7uGiGx3FK2KOJc1hiqB157LN_cSeMWQ5OfRvXyGasG_Bj88Smmp90KmjJQdF7wpCh1lYuF6uMRpCEjUPx.EClhsQRgBzdmx1xvRq_kj1q_LqYByM5ixp_yQyyoC0rW_Dp1Y06zL_E8.HPnOhTo3V9DAnf3HwGedzO5ZL0nhVrC5qxtgHSHi7PDrg1Ua3mNhxOTy6gSGVirGnEoD8keiDKTEuwmSGfY0V467ANvzpD8xCoZgJzzQHrVbzBuos1DxACInAhUY14Fj_eGRun0QTvpeW2VLUdBskwJpX_DarOsdWR1ukQxwUAKq0meWAcsrWO4ZUhxTeAZU_RQ168BFmr_3hwynw2W6LhKzhxxYESgFubbeXe1_WFLS53XTSg3GwyD_T.Xt_WGnNjQHIvSK8OWQ85bdnOtSz_xftHTSubGIKMZI92EyUNhgPdAdlfaT4KaVJuUgrgOfth4sfFpOz.1BuEOdZZmECaTWc4nl.Cs2UCY2rA8mXgNe1SnRdcaozOqRfsErskFUgF2pGs725yupOFiy6zuXojjx5yAHLZpQEnuZIczkn0mejopL2rW67oAYEgv.bYOLzsMC_m50B9XLHwIsGldpBwpQe.RKgSMekqJw0AM5dDucuo0N9zWLfBboF2XeC7Rb.5L.AqGSoaLZYb_.wsE0CWYJbpQXkp593bEelznqzeaoOmArTuklRuxoHrc2BhMYDYGxCiMRE67OvmP6O60hsLzEvSU3d7DVufXiJawxNejKE4234RVVKFFLPjlxd..MO1PdTXmQDUWY2X5H5P85wcLNzZ2JFU9K6XKZUca17tFWkAIM.58H.kZLLDQoZXivZOUjkTvDRreSe.wm8POvgUm9_s.aknTqnibjBjhXHODcWxTAYnrxuTa_v8SN8KyZomB2mx5SmljLqo6a4bHw1XwxJdjmevegBnb97M4OWqI8xgakhenwC_WB8pADoDaiBpIlkPO3NfQIUiRVU7Uho3U5myi4ksJ0SgMSMmh9UuC.21WOBeyEaupU.hRUhS.YWshZtTY4bbHeCVsvqQMlrcm.nf_mML4L7iAd5_9Y0s59r0duXsaygNAcZxZjb3IiPj8BphcoN7mH3cBJzrtop.NdVeDR7RkgV9VmhSiKhbEkz0ZUN.R6yMUrvUqbsQOeBl6Bv1GWxwsx6kT3J_d4WNuFSlv0GnTqXwWf26wtxo_MjgQcCnzBPPMlya5v.rqG0cuHYcTFNOydp4tJwKatm2jEoFNxJKM9BVxik3yMGsNaICW0YnEdhW2dSG0o7BvatLiGJp92z2bqGd654DT12jSz1RtcT81PuV0G.7pVYhyH55Q0GsaKOR9I20X1DqFwE7gwQ",mdrd: "bVXuqbhqWO5Z3bvDQWc5.hA_x0dux.owoWfjoEmjAEE-1739778433-1.2.1.1-Tcwv9Q6Ncctgz9a2aboCJ_DDxGn3fk_2WynQ.4x8lUyr0gWERK5e03zbT2oZ0bhOHIc.0xUwy7j.Kznr6clnWPZg.8bLRNuwzj3lj7RzWRZXci2Zlx0V5l1AvA7DCo41E3PTviYMVjOomlB60HinRXSXaKXs_WfTxcWolFRE9JTA0d7zKzxpeivUUpLq9Rp9PyW2pJCKay4Vaj9ymxsO1Gpv5OQVLudCLr39pK6786Swl6eomMCaja5f3Jb.2mHXrAM5F0RLmkLofFii89UAzVXT6UXKePMHsuwnDtNCkN2jJCNrsrwCYEI5ADpM6AXeE1noIyyhVVHWI9QEdAJp0HMS66cWj7iI.xLc_RIXi9tDPW1LlrRY4LMTlsGFnTyzM7oTNLqCtdNcf5rwfi5lICXaX6dXH9NHIWlvAizwM.4kACXS_KyxyAl1X2fYWG5C0LJaDnu8WzgmGz0rXqQO0.BrmyFzPO5OaoZCGTuO0_7j8OI8WaDPtQKb_FAptGAcNukM4v8igw5XfeINEpas1LEusUtRGA2MXscy25MRLN28OwDRPawlAGWhqaeCryaxo0K10e3F5NM0mjfmertplLPGEW.H19ifqS_qW1JEhqbJfjNv8UDqMiIbL3IuTsAAzhn67BGiumIXNo2YuB86lHifXZs4_OKviFdwzMK18txATG5PGMhwTJQo54lgjK8k1MiOOcrvFkMpMSYxJTBzxr1bGk5tgo0ArNBRdioo3F6VJcOwtQIe8knJN9ybZ3oR4Cc1d_aZe1qw.mxop9CCAwgtY48WI3Y6lLdmjdPZOXDzs2wh0RArak6z28al_hwyR3RGapT3nWbPsysVb.KouskcxeO_CB4taxyHAtRK_v4oJdrOHroBmc65iafjf7.8IhU_s7yE6kccjHo8_tTaoMNL5IyTQ62j40M6dwMKaCaJN7Q7L7J1zvgSbNmnzR.E1qzOzq7Divhqez1eTpBShk5LKcWWllk5kiqwHSWKoj_kUH8SOh05M_LG2IRJpeF.5BVV4MK8crJDcc3sNOCK15aii8t9bpzJb9wl0FDv4CJkw1AfhhbwBT6CUMJwTYaXpOye0M8nyuT347U12FjYZ4WuLacqCDmR4CieKOV.tZxUDbWtp0HBxK.NVKwRJfvHusKFZ0s7NRDElcWT.pxc_lzuptV8HCy4W7y4Yt5cEeFghlZxb8eYPQL6agld0ZzOxvKG8U1Qb2IrWX7TI1bjJPHQUP_Tfpx3wdYqnsYF_yjfd.XUdRKCopzn0qiC.GS0vxJPRve0lG0QuH.6pQbiM_7oGfrzAB9KqsQLz2vuONheULipo7SKIZHJ6j9FpW4mVmUXAtDVt2UM.Ev838ffubJLXvhBEIDQxUCw13p0ehIGy.gtwY6VA2nw_F.C06j3fqqedvztFMVZ0WvqENSyaryo8FaFEsrJpLYR.Cz2bnpSi77qeaVCpmdDXCRDF1OPKFmhmHvBvdGdrEn4RM7FMsofATEr51432uhl.t4eV2cEcPZg9JmHKapkuQxKJlgcLwC78uug2ft7J8XK33x4A67cH1GR7hqpR2PEy3FHDy59JFdkZf35m4eloJ3e0btFMIe4ToIX4MKjWF1zaZrVr4QB.ZSM58_3AKh6nM3rekovEgH8dzJnZtU_ng_FHHuDL71S0E9poMb.xbxjEspbb4qKXXxqlijq9H77xuLrF1PuKXu45DJAbiTGEZlT5puCud4P_xSdBq_pukQdGcv96O973anei6AY1Eprnq14baww6xB2oYUX7Eembyf_DNmVQf0LAhusOuoL5C6vsfQ1swXUF4OD.GX9U9xGMLBO1Qfbi66tTtV3WTzRb1_32txuZOaDGJqRCw5vk9HNEXxxRfAqXmlrEU6T9o2Q8dFqylCvyRPN7zeXOmE_t8fI3kztg7FlJrA14ykvTdi.Ok3b5Z22vKE5CNRzkJtOuo2R3AEcgq8e6NfudMgQNWw3.DRoz8fyNM0NcFn3mkapjBCroA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91342b067d34f8f0';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=Tawana%20Keneilwe&__cf_chl_rt_tk=2M_4zUr4UWurbmLCcPMKyAZ3aUD1CLfBgouv_gaaGmU-1739778433-1.0.1.1-ok.MVncPEnOuJHqf79hOH4FyV3BVawOiCCvKgGc2LnU" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>