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: '9135006549173fff',cH: 'XKHF3xFwDQ5VJlOvh8zr6F_UQclR5c5fqqq67sutsOs-1739787172-1.2.1.1-LfM.Sc7hZ6Ngll2nrqHyVU4aNErrmeWCxywUan9DS2Qf9cmDALyplQT3Nv.c2629',cUPMDTk: "\/abstracts\/search?q=Ahmed%20Sameer%20El%20Khatib&__cf_chl_tk=ELv5.OOe71VubphXZx4XlrXcBVSMHYZq9y2OkAe9Yb4-1739787172-1.0.1.1-KjCALF0ZVCyfEBAZy9G9gRLv6ZasUqJWgMjQbvZEBok",cFPWv: 'b',cITimeS: '1739787172',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Ahmed%20Sameer%20El%20Khatib&__cf_chl_f_tk=ELv5.OOe71VubphXZx4XlrXcBVSMHYZq9y2OkAe9Yb4-1739787172-1.0.1.1-KjCALF0ZVCyfEBAZy9G9gRLv6ZasUqJWgMjQbvZEBok",md: "hOF_9j8M8gKeMOsmXziv9CQuvJ5NOleb83y8D1OgrSA-1739787172-1.2.1.1-Yp6Jbxk.n0NT1OtL0lgPV6kjOI3GbCHZinWp7xdPNFVHNnhvFRXyf11vWLEzyN3TMnQzCAgusyH26wVD3qdMTHJZGDw3GgNIrJ8333PXDKQT6kjNofbedVJ.prKqnLwpE_7b10jAlUJwXhR915nGBFQUGot2ZHKri_clQfWqREUpxp.DLQZ1r1e0myGSXo8a3HiLH4KdWlzeqmXq9VDBazZ0U5Ws5mEe4EGdG8k50WGPCfjItPdatvEz549686iU_zazLUNSYXk62nzNnAS3TF9aOlQ9UBZlo.3_TzB4JTd9APmpdH6x6kMfn3Wrns388QEn_rVHwkzpUQ7xDwyDuXbGUcMswSBJZtndDYijjeQwsg4JIPUTooWUgunHK5isxQXH3wvzbtJxFIvZhDxDwGBKaWS0vLmCailIlQH1Wx1BwxX1zrAVaIx_Ek7B7zDnL8v5SX9lp.7ozOVbhDOGslwNOYgGa9Nin4xp8QVUoBWVuFJ3Ve9GUsmSzJ8KFBDU8Bdj2CWnLXqHO4VtBrrtr5u.7OowmjqaOlwl_J7043O9SB36W2a0gdyN7JH._Y5O1DaC1is06fe.2_y3dByEraub9ca4GZcZG05zF9PR9naI993wGBaiqgO8F_kTkie3pHhFrxn7C_cTxAIdpoY7TKpVp3BqoDOcmoRmV.rqSDm_pvYEX4cMeG1uNGzHH9gHi9RWRRBizL6OFo.zb_eK_63fcFj_kkJhCkRO8P8bSauF6sib_C_Pt2gMV1EwTP8zRc0RJU7pzfckZGNmqLSOu9MRWlwcqMMIdY_ujJj3VhwK5uYdw3kkSosZdcaLM8tEWoocvnTaz8fSgnEQu1oquJBuD3Jv_zUU25cT6yP933I__PtAdS1d1NgEqMQ42zZpdm5Cvb8ye1GDj8KQJK5NJDfU4ZAPn3IDTPB4ftUASovGEkfRBijfYBa7KDpFJODGKThSlNELDnPMqR958Hjd_fhaTAecwqVeoJvDOTjRomTKBVg8CzJ_YCpTX_YvITCyawqO1yz2jhU.Nzgvs8YTZpNat7pk_WSO6c5pfZ.ZE2U45DT1QxiEhy.3l4joObo4t5_D7oizeXQJb7qbKQc4kv2B2lNaeeCrQwaQW4YOpormPEcqgbmerlzSPdCL.kp3iEBdBBsPNz4KEhF9vcX1Lp0XN5mEHujdPBhnR9NUeH4PXdTxCfyVHgV39avuI1JxdJ9URPt5.5PZzVO63.9RbtytxC8Li3HA2WbWZ99sPyXoLoMUs7MLb1YrYspgcGcjGX2m4loZxtjq_7DUdz6ZCdlhLOHv6ub5uQHlxRjSo_HIVuKEfIryqr0W5_dzd80btToe5OuMwv8rTPUnPxjP3fQFi54WdE1weyF4K5CKkRK.eDRTrgJbxMptlRuPqViREiekURqI6NPneTDABSpTvB3BBnpNQ22QU.B8gBw5V4mInaeGUo9h9U3in93yEqY6qVI_k12Qp5robadwD6A9QBit4vzKff__5LW2XXGE.99bD30yX_PuzQzWO1p7brlvhx3aqtKvmZWu9eVUlKM.PelvzzsOZPo_EIl_L9eUQG3m1LZ3_K9CU7O6MZnet.TMXv9S_Mo6l0FV82FOReo8bPP5Ryx.gQKGmr9qP2ceaUDAJnHnvan4w6xpR.3LeVBdd1CmsXHNObeJiLj63215ACZFLOYH_XrQGlV_16VpgUV1B4rMGRK9eCJ3rn7E1FE8bJEUHvmUTSlPLjhZBR3i3gRgN3y0X__DznrrP.1isKxq2Ng6hFVmtz5KTBVqwvKc5igsiwGdP9ieJDpDYRQ1xxcue7DBMUQAzozet1CSyE.Nz0yjfwiSAmrGcT_LkNBswzADTGUuisgAJ5r9c6r5HxS35bO1Sr3SeJiY5Q.WD0cVbHrCb11UCdfcgvqfN1C4_gCeUmQdFO9q412s0Ys4bnlLeygGkV19LjhiI1JRlIEK4tVO0c4Z8VMZSpTQUuO1",mdrd: "VNjhATN2U3a1YvYLtiQqFdjm.qjgQLYlNdo8GwZsWkk-1739787172-1.2.1.1-6nPy8rmQRpgkewSQy5nBsWBynz0litP5IwhdPBU_4AJicTAwe8yXXM8MrdnJP1KgHSKrRwJ0rx.HDihKF7wFLGGQyPxfZIsIfWgVY3wRx7l6LKM_VvL5hYQgYn8kONk1uxpzncxmqNhHOPqv2SSRzFpLXa.zYQL49znSdXBmonv2DxcZw4qZUQxF5veEl6XXg0nMEyH9lIKrQdRH5JAOEAoTR80_CSjSwT3dXLJ9s.abY.fxDK8QbC.7lhzQhoePLB.YWToU8onrKH8Jomv7pZMeP65PVQv6aJ6OMkQUrmNuA2EVZuqx6wgpFnrZkueYtpT7EzEJYdGK_Zy2tfLCg5T_LM3oh9ONKDzM1wHCcPsjc8SrNVipeH7Etj9zKjlDQBZ1hKbs3kCeK7WJxrlRoyKeJuWDaLUQJdMKjSRqcYM2951AOwHdq1lGUoRHA2BdwBoVNa7Pvhkk0uyReT3p2W3EHVg67Q6gydnCzy2sQxKO58zWrXCNSGsCqYywoM6.qlwGugO_yL3QQjsfKX10YE.alXBu4NJ2Nwx.AaRfsAW75zMy3Ign4Y7oB03dxE9eId8ZjUgpF16d7T.1yBG_xGjPkTSFo._P7lqovRqK.uIf5043U9EjdokeAo1W.AmVuy_0RmrPaHOFKJpWwbwK1puRagpqKzfzFsMvR.ciLHbT8RJ9xtRUFW7Ebs0NDRZNTslqzCOsWfHtlTvsTQtrCG6dwEhYdxhj1vCNSyysder2c3YhOU9ntreZqYLgIDTLaBrISlCnev0hRVo25qhbnMlMThvTTP0ulVeI2_gNybVCKasNN8OqJ15xeUEpEF2YZ1dA0OYlyqSjyal.7tUjknMMnm3qtYjPTsttdqG0zDLmXsQWu4E3TbMYPcGWwaf8jDvNBfDKHv9miFnXKEQsp699xlSXovINQsiPL7fftdRr3KfUnsNyNFNDSyxIBIm3HZRf6EiUt0QQn60q1VYlBvydyCZ84suetz5awnL.V7GOF.4SjgrH3sIJSn22U0rRbfdd9u2RkwrDNMRNBH1rCQEV69qEUC8KptcsAVy2S8luOaaBreHI.WpqkgHplk0x31Ye04YA.25tO.A_LWcAW5Sj6NNjnZI6PnnqfSADQPYpZC0axKhu4Lv9Mx0NLoes_sLDZfncO1tOokMccoXQHAEdiKg4eeWSfE6Jecan9bMmiw.MCQX65dGXaBs5JWE6SqonNgBGrCKWPg6XskBQwVAHljIN_oQ.SHVaj5p05_lIgyK8OPBX6mKya.iqhesnfyjZlG.3Zi8DXpzbNVx.zzgo2rlkh6fkKKiMSDx.7mME4lssDvuYjbyUUE4WfSyYD31mgIKUS7B2WiTkabyvMX5lZg86oBITRfR0MrXNlfW3VB.KaUJNbVGe4_xGeAM90Td5Hl3D6kGDUoAlMQjG_93s4PyWZdArLWjHCu1b4y2AQSVP4VI2TTYqg5X5Aq8l_fWY6xtXqPgQrWjdpzpjQ2GdkjtJrSfWmCg37zSr.qrtf4nYCMKEop9ji_JQgIzISVn7606s3iAw8m4yNsewTk1LDokMQI2mpcGijWdLt3.J.ZlmquoWA_MsE8k18sExcuFWKedEE_2AzYmnaVdfM01Pe7q0YMz0pdIy_HqklF_pDzZmQolBOiaVFd_QzKcGmfGq03mnozWchMjqwjNKSi1blPTuPTSm9kSXyjyLm329oU5dr8_1D5hkgA3XQzYu6OQOfynuW5YU_m3LzJe2zjlgTZW08depWHVYTRMrvThI6jI8ZtmK.4lrQNNVP758FwzxKzx9rgtnutdIo532EVErbDfXRBfXbEKcMGMrajs2oRqISYpvKblnAnUSbzjorYbn.DFkPeersPYdigYyyXKOfV30rmHUFv49ODeMo0XBcRH4EUQc1xizl7JOPv.OncwK0J.DGLM.iqaPZq_0nsg6sjoHVn68wf182yvXY.o0E4TO5HHdp3dQjCj7GmJIBLDySN7P4_2Bu7tqqQtlaA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9135006549173fff';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=Ahmed%20Sameer%20El%20Khatib&__cf_chl_rt_tk=ELv5.OOe71VubphXZx4XlrXcBVSMHYZq9y2OkAe9Yb4-1739787172-1.0.1.1-KjCALF0ZVCyfEBAZy9G9gRLv6ZasUqJWgMjQbvZEBok" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>