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: '913527507e9281aa',cH: '6G0XcYYv3LaTWa_m.gj8VaMHB2uP37K4kdloaL6s9N0-1739788766-1.2.1.1-1xf5dyibwWob_t92Tp.tg1MRIXiy.UcWPZMgKV1rvF50Yl62NDobAxHw7LK6h.0y',cUPMDTk: "\/search?q=Barkat%20Ali%20Khan&page=8&__cf_chl_tk=f8gQ1SUnXvab67TupaGzX1vlSpIjaiuif9RApebLrKY-1739788766-1.0.1.1-4OcCXHytSvMEwPe6sW3WcLFkWlDnCU4BNbsOdaC6D5o",cFPWv: 'b',cITimeS: '1739788766',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search?q=Barkat%20Ali%20Khan&page=8&__cf_chl_f_tk=f8gQ1SUnXvab67TupaGzX1vlSpIjaiuif9RApebLrKY-1739788766-1.0.1.1-4OcCXHytSvMEwPe6sW3WcLFkWlDnCU4BNbsOdaC6D5o",md: "PFaKBMatYo9afViiDyye5qoIromrsIOpWtX6yrcf4pQ-1739788766-1.2.1.1-_tM2BsuHjsJ8HPHcwtDZ76n37dBEFJXuQsH7u80GIHE7TYX.foHIL2lsLaDxUOhz2pj8MJ5IzoWIFEgMvKTQXPKXyptmCuGGt5g9MqfQF0G892v3mm4rFEOYsX4MgWrsc62763Cwcr0quzv_IAgV_XuCd4VNsaJ9oYSremPc2FpJeXdLs1dNMR4j6aMRhyQ5OGai25YSWujXZNn9uFTIoI3Z33pdxqHREYdtGZRRvMLTMz_Wn652RFK0xxKvki4g0EYZjCmSa0SARWi7NFFgFrFxzsjA3raCG0VC8WbJpSjm2QXU2OnS8EyJxZlUI1E090kuNC9IuOaqw2fxqY.iI4oSoMZpcvsYaRodMAF0bDtJSFgPu5sWvn1acHlijANkg0BWwur1J2FzPREYHSVTMgQk7mmVVucn6l9Ky2bi5rdR2eUwhPHz5WoX9nHOCxmQA9LXqCa9QGCQLAdbXrKzMl4A_CfXOqlIb_MLIxxhWGfds2djKfTz2mAP18s10QYf8KJbBK1hn8fUfXjKvN2buECA4lz8TCNIJpbiAxU.wjBX09_awdP8r4HR95fXl0YX.PTE_z4zxS89P_x5BlfnO_xdW77EPgLlrUupfop6fcV_rP5VURZOmMZRoVZQ30Z0R7BRQ9yUI47MxC7l9eNqyqS1m0ZqCHJUjC90JQX9lzQzC3_cmPLydNak9UHQHcO8kgGYDV_TinOCpt8XppZ6u._0ydCOartfRYYjyOOEOEYQNta2BbqiFQv.vZ739QXfvJF5fpjzycegYc7tiEngRP8j_LSHWxEjU4zMvKk5oDZPFYxujo_wDlPUTXyxVmTp1ZdDUz1Z7_mLe8GDEKAV.cEgFYE67NNbY71ilwEhyLty3Fd_vDOrUptYabPg6cSpge_rllc5C.xYbkPdWip7_IKnTc.qMe9SRAOxk8UmwdAU5B9xn.ncCFBvrZy1olwHrQgb6gHFzDojYspueHH45CyYtt.ta_SrI5bHMvn2qhjmqlMubMBJ7iBVyZqDRYWOxtoD2NFio.4lYEcqQV.tehJVrnGgksmCsxKHkHGC9R25B2mk5vaMqyOyb6FLXKB6Djhnd0ndHiRinsPuOFeuWOjTJGGDGhYUHLTJBy852uthnrD5e7YtBOfNQskX4jev0nHNQzXlEtXx1PwGGY9i1AIcul7P.y423_Chox49Ob5M67p..pTvBVNduODgMP_rygaILA2kee2vkpUHTmgidXH7CckRRND9v6W4CXW9DzXw2SbOdU3ZUzFtBTDJXkoZTNNDkxP35Xf88ZzhqwBYj15_7vvdxipfsb.D2uXVA9z4MQTMJdhy1AiYabbKme9W9tHOMuK0e4pQQ._270Z__9vJ1Q7K_qdaFusHDAAH0besJIf6HQdUNdSYUj8PmuY_qoTsFVmf6sQdFIoOj3hHnKRW67iKO1Ic8.niLofvW.W0DEzHY95s0NBW1sK1taVMiTpSa7JTKQpDkcjAIMBKdEXGGu9osGq467rd1RMRowY9xGarJdmSdx7aFX63sTiD4Hhqko7WjQvF9cDf37oxdgsRX7c8k0iJW5zwIxLRG7CCuJ3gQCYKQR9bEVMTQxMVlxJXTK3v8o_TdqkEfy00UFufkAEczZbgRRpKanybvZng02tWLUL1OQ5qkTqM7EJa4YmFQnBsrH6yJGTnxHCUFyZ3cn0QkYgbNN1O7ZKBONtOg7aRMQAcT8fli7iQo3bnbXVQ5FdU7fkyiU2DjXI.P3j1kUd.6gQpCh3Wsbc_dHIvU1kgVRd5t7eW72ZqEY4weKzvINvHo9QerKR65VDnX3C_Cf.6e0pTHRnBcp6t3BJbrAUT3apA3EeAja8iL9qylWL5fXICu7avLzUZt5IhJh3z1xOde1VXFB.FHMDoT0J.wUIgordWsVGECSD84H52m1mtQeY7SEfjHRDguf.O6lHbIIMWn8mvz0X9OUGW_eY",mdrd: "8JYioPXcUee5WvsdvvVlFavdhQRAoOVeozWB4scMQdA-1739788766-1.2.1.1-7C9wvJEy5okqHDhXuRoze9Zg.lDFXBw1nf19sD5vLJBsTG9ibIgIZirA6hcjHDp6.k1wIGqprVuZDLYGmqeset1vPXcE__2T3akEM9xwbWDH99Hq8O0QEfL4cP758gAM97eriGdllOPXfmVPX2gj5DzRrgNeOjywx8LKeMxztk8pYZqSstTQ.TQxjmGtlH4zy7JzIsF.aJCyvbW2rF0eRWLI9ap0viLzgH6CJAycIQBTDMRSUq86my3dB0vamoD7gBr9NV.QUjVHG2nd5G.BDCwNb82muu4lebQKBMqfRxDyi2N6Wdi7c0BjrP.e27EGtzYRVLd_u_.mt2ebNZj90xhpqpZklXbqZpNJBNQLaNNyAeof._mNoYkLxYlUZDAEF0Grk92Z.HvQUcmxS5GI6kTcCvLPJvHxoL3dVLPdIG_NQasx63XUVcXMzVvn0OlldhkryWYq7Tkt.ojtXHQwzf40o5sq3t6X78yjB5VGG9hUSuD9MtvTf632nu7TjgAGagHN3eKC8rErOCrVPUAHtHAVXaw0DLw8ajbOCwwOeyeSVjWteE9wN5lkZk6MJKt0AAniUNPPqstat.8eaj0PgBT0rGIUO7yeFPwIa.pssuk_PL37ZpvC_IXNo7ZaazrcSDLsDTI5LoWmknmGrUZkifXT5x1luHS9iqOKAY.ckrEc90l4HQmAzuzX1SHVMbsn7gc6oRO2DHWkw_jY5izX1F2zcYuvnpSohJjcQGFFMhCrjAcobGF4HHnwS_ahSVPwQTZZjTnQIffhiPRM5Su99mvXuQxTwiHKXlUcBvLDpLOgN3bYlheFIkYnv.FNKKlNFdMnO0m7DSPtQ806kOdVFozy81FMdVs9vj7LoxM4S0YuL__AHTs5SfbXu5cxM5crBItObe4NNcXC1ECVNyOAUCwQDp5beCJdlCb1drXaoJCATIU2_flr8Fej4lVfvTqTBAUDcH0A1FoTaLMIwt4PmCWSc_RwZKkmMRwTebEOZfOqVir4WGmrRndL5E9Xi0fKy5Ieik55lgYEHbJkvH2kNk2Q75pkeM9RfmQG7c4x3VW8eWQfDaDJuoN5FkV88niumxiIfciqHIKt8XU8IZscjVIgrtvKbGpI6T1Pk8UFCYi9bu79YBLF1FP5zc.McdoTZmK3g.XCdbN2ABDLNilDxJB8.mK6YHaP_DaJDUg9yb_mZpRN3s5qMuMk9dyYLCKGaqn3Tp5_VCcrrLOaobGrROExzfBWjXLSE7X6Vg14v1nns1RqEnQUBArHdSN96mjUM0MhDWqMHppiDewxziJlBqcLlv3Pd_aqTex7.mKmFja0EgFcKfO8OjtiKJR0oaN3cdykzi_zJHUBK4GSamF7S.KgiKNphQOvKxU_3B4ToxgWBd4da2rhgEC.LNayMX.Iln12ICn8UYztfyLUE6oRhf7fJiSpbvfZPork5_rPZRkC0UNmhoUOZ1B_lcbvIUHvofhoIBqlM4IUwsz5Cap4IsDOBQoLpinUef7bnXbVvrPqalANXFbProPt7FWxfcTw45A9rUAgAw5ZvddaCidX6kzneAs_TkmryxzndYsAFG81qPFWXySDpGRrkjU6b7BSWg9A0LlMIIVBNVuDcH0R1pptqltN5Fg0BJ30YW4Rbcjau4mzpagBP39QGgUMyUvbHZzIpqIV6y.5YMA.UpmuLHk5AYpxogE8er7m9VSArOH8ocqrOuJirkJMVwWr5Tllqays21kuKE8nnekBKTgWAoS33QFwl.FZoZmeNtiz2snuxWl7HDqmMJu6u6RTowxrlxQOjz7S25tYchtsG7RB5quFad2JCSOj0MTd.99CGbjaJnKEIT.03cEI.QbZ7k4hyATuRY2_jqJWn8PlRi1SIwiODwhEl6a_XX8DNKo_KQuTLNXxP1u41O8XTxt5p_aLXgFQMHakNCE_o7mkKZAgA.dWHLQrcjc_BaTRp_hNx632dgbgmVmyAsGeUfrQYC.Y"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913527507e9281aa';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=Barkat%20Ali%20Khan&page=8&__cf_chl_rt_tk=f8gQ1SUnXvab67TupaGzX1vlSpIjaiuif9RApebLrKY-1739788766-1.0.1.1-4OcCXHytSvMEwPe6sW3WcLFkWlDnCU4BNbsOdaC6D5o" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>