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: '9135688d3c7ba042',cH: '_uyFkaIdWSxgLWk1DOqNX2fDp_UxJ3XGcafxaIW.SGY-1739791438-1.2.1.1-XLSHuwOACvu3YNCMGS8bXR6Iv71KEiXri5LPsProzOVCx5SqdNGBpfSz6JugmdVQ',cUPMDTk: "\/search?q=unmanned%20aerial%20vehicle&__cf_chl_tk=kXhxfNZ68bCWU0vqyaSb5bGs9KLocVF.G2coO_Qj5Do-1739791438-1.0.1.1-zd7Ra4IwQa5bzzXKQ1aYv7YlIqjjGHqsMOv0CrJ7g4c",cFPWv: 'b',cITimeS: '1739791438',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search?q=unmanned%20aerial%20vehicle&__cf_chl_f_tk=kXhxfNZ68bCWU0vqyaSb5bGs9KLocVF.G2coO_Qj5Do-1739791438-1.0.1.1-zd7Ra4IwQa5bzzXKQ1aYv7YlIqjjGHqsMOv0CrJ7g4c",md: "RXpIhRZEXIlAmCox2mFs0_gNXTppfiAOnuqgp_pg7CM-1739791438-1.2.1.1-mwvSJGwiBEbD3ZaFc1zEesEdFUYqAQ4SPETpxf0f9YydJ_0Au54595OAjTFjK.fhfMbuhYEtMaoTZr30EQQBEiECB_g1ePvUmCw7UV3tIEbChgf8FF8QTbBAMRbdEiU6cK.T8Xtk1rQtZh68AFAzvk8SU.gHLtPoMmqzN45_taBVPV25wxmbsz4Z3yACFQemgleRhGXTzYGHonfTyPE1rA.R5JL6y_6ONiN3BMkGMJDleU_.f5yTlSY1MOxOxjIR_ZXbplA85chl9Fg6QrdH9to5RoBuvzuHh91dE_o_p8ndAneIgAmdDsomoJyup4M_9.bF30aeNJqC6XrJ4BS.020v4DIXUGqienXYpm7_S3H6JCtJe8qDLIJHihgPgze3CRk11x6PqEpUtlJUoPLnTMwyplEzSR2SObQ7yEca.uuQm3d1qvBqyiuPjC4dwUInN723uMHzEtxVoVrKGy5MS3Qe2.jvxMmaXr6LBHy_hja8eamtx6Nhsd2FzL9Tfe3zLwFJVtc_SB8d4YYPJ5UxLsEVixyMPOsmlXTj7HV2Jqhw1kw4fqqmda36yGQuY7epNhbsDmDbXkIBT2xLury3isPCZuEnrqEwfXUVrOveBUJsZHFGzuS3DQMatt9YGto9jalQmncOFmZVohFXo0WgBhRa7n.Nfo4Ppz3LQA79R9jLzg33eLbUfjQpgUYvIG4viImT9TRjgGyLtRH3coA521MTUuksDTPy50dn94ywIj58d2Mkjy3nhUr8qLBsiQASxCPtwmMhpRVkKDtl948Z8.b41L.E6pLHsNLmTK3Hbx3fAtQkUdhbXMtO6f6NCCX9iDUs6BOYKJ3n2uByDc1yVDkDVoOHe17t8M1L3Yv_SqHeWew4JTRngs4k0vYwH86M8ZctE3DUByHTCtQkPhmM32b.LU6j_0pqnzIlYAm3rQoyJuDEzGKTkL9gIkC.Wu5lzDleIgfJsfsx6ujGMVi3fpDhdVldLsEOPLCFktb10nL_5HiyRUaGW_v0aBOMojsl1kowaDQ2deiLEmlSaimM4KaPXJ8uZkuqKcyb0l20xTCoPzVV0G_c8KWiSiSKmPfAindYdMRQUSSzKGfqhb3PTZ.l6lhGyuNWIKcOywy1NDyWDqmTwUmP05s7cM7JY4Y7f2d2ZtYrfeno9uzUb8wLlkhdmFnH2caTEMBGfJsek8KDBv6Gnz44GGrEESfSZv8RRj2cdbDWw6HSUg2W6hdeOVnRFmzZZLza0leLMqc6Znvahh9NhrL2z7PXkMOWMJY7SlbY.JtdLT5y87gDUiR2fzv1EPDiNjij_Drznrta4nZZ.5TK5HCeXKnBj8Tkd.HyR59SG2EIL7iJJR8vvMhwgED86Qeer0A6tdDjDRfhcVUHtPkCHULaGPTN4Wp1P8PBQuOFI3M5UavjD1YyjGPueCFn1dJsW_Cz35LwAMJI6j_SEmkqRbAveU1ZgR1OaFtBBESdWqGZNN4GQv_1XgcuaUpCVq8w.erwNvuxnxriOFNHhumPsS7c_.J68LlfHCIMzc2rLUjuU.F.H0SYnqucByaaO9Ou_YEnsDMToS4_V0It6XnLuqyajAhzUfb69ooAg_noJ.kaYRavPFNfzyHuP0H.Ff2LNZPUcht.BM6L_ZojGYPitO.o1z8Uj.CSwo2q4E4fE0oxk8kP8lmxEQSLbUQd8fpQp2zo7MOB2z1zXIsUBfiCLcEsvuK73KDG0khs5JxyYII6tcd8pJWOxwN4PSp0_jFP3AkoBpAAZ98DXVunvPs1Li.a7ggR9fmZxATknRBFJIE1lQ.VxH_jqxEoPbf1YOx5GNieHMIyFi8k3PMdfcujHKLoq_E6kXTfnYbt1kIajwXYhpTTIMrZEomMKeU5jGNCc6wEZmXQPbkfN6Q6RRm1x_wQskSYjKuK1dEqOm1QNd.gjd6ykOjgCkVN1UOvMECu8wdVXnzi7J6gtoQ",mdrd: "iE0fy2h3J1yZldKFTAIG2ARfBPepo0YPEw3mD2sLxtM-1739791438-1.2.1.1-409TuZIjl4nnoGHRM55A_muqjx4N3jJ2wEh5r5cLhvoLNl9dl6N1EGMQ0VwpNG0ziN0eLJJmsim4eySRRyRPFPF7sKTkg.TGYeHteK6Wo7PRSL6p28VB4dkccB8e5NMlV8HHOUL0RqOAbonXD86paTkCLbqiK2feQTvbnEpcSTixM6XNR0fZZudMhyKYExYEhUL4NG5YMim5ORdYcnEzpxvlaE9ZqZaJ0ZS9jMdvaht.ciOL0dXynBiRsqPuSPfPmmL3Tjmp4yekbAb54dA8xerpHmq6SmC26ROjSentB7nffoTh1X9PoVpHC3yoDTOOnXKLBGaezxPB61bQgB1cmhQ2lJOuXLhCd8JxaBcUTjneXcZv8.jOSJCZPYXr7ux_gKe4mEIYNVDVQc18V2jHecC6U8cyn2k28R6M75XDMZM6AD5aH1eg8KcGUzSCg29pf8W3G.Xaw_ujpOuDSrDuY8zGCvH4MVB5b6AjHp.INwA_PXW9O7R4m0jtO5GffdLTD16ZeYYFqOclprGHOnJK9FIn48_9tuvxxUf9_uYWSvnTxOHxFxU3Hbyjk6WLHL34HKdbCNpzXF_qbzYsxXy9alhoXv_oS16zHTvOb_nO3abaksIPLljIEB817AJe9trF0QgUvlLW_CqZbjYcvyVG.zki6u9GNT2V1CJiz8wESz_7rcU8.6R0jMIQIoR.crTjnn7EFuuamc_SL7czCn3Jn1V.4cGkvIHk99anXRF6K7Zvb0_.WRbH2PsM1Zwv464yDslsQ0dPTTfNcTfpudEzKk2.u6fsDa21AGpmLzMp164rOyL.7RyvBezhGpUr5ufUP9_c1foSVBUjpleJ81IFO0yXwZColvx.6Pb6GRwZllW.vTvCl9wSO9bQls.vhqpTMnv6Zd0K7pHl4Q2wBGTm9f9iuruiT_a7.zoPB30t1CtdgYly3tzdGG0ik6vOLpYEMBTIuQdq_ePViYNjmTthej.Ffcjfxzw5EVwULb2xmj4MHihOXPz_rqWvGvzWklN7XZSH5Rh9VTchdOS5D9L8loulFQcHeufQsYRJjcbkcv40q3LzPcyBHXJKV34xAJtjeODjMM3og2LOMa_spTUe9xMzWMHTuaXLCCCTq2tAdotM3JmLUvqD27hM_uxbZwXBjUJJdPIKl9lt7iYM7Fx2zr37Wv4yNKtBzBqRnPORadImSpFCsWZJIDd_HOpwFOEL3IVhUqOXRAPb8xFDvVcppLabhf3jXP.ZAvRDH3tX5Ij8tttltjLAC3671de8Sela_SjmPPt_QLT4I1WHAidn42zgp8AYhJAS9NxloOCzAhhYIqcJi8ArIxn6j4PDGTR.mVlmJIFPHo3KmkVrFeKY5peVp7WP9OP0cvgIHlqECwYJtoIuylMGWPxW.AhUC9kpHxE2.CHVcwtxYN9cAIiFSaY8Kh5NBNBZufaVibLZaHTcR7sywymVmp4p3WdsAyYWvFf991cQhi0NkkYAm3gYZEmRaAgfAxjjiD1R5h9KFBxkM6z8AAEwidPlqCbPTMq6Zk8I9Aur_Fl9BzaDx809rOpJhtR4.gGZPk439C45UxnZPV2rqs0NDZ2pw7kDvxuuz0ljYN5ljDDjT0s6OJ6MCol7CqFYKFWOSJf9_CiubqDKuh3ivq3ZWOSoRFJQr.WMp9A6cj5gxqcvqEMqHNai9onaaO0BoA6NWRzfNYqbfUC4TebhFCvEOY6aFjfj6bzVHwwrF8WVManC2lhAkFe3exDEgM7Y.BUawYAuv9e92okWSHkfV4JzBt1P0LfQngJfOghpKW4lfLnHD6H1B91UDnpwNqlV0bvZ3jg5E884aqZjNt8XYC4GDl6bwty1_cizMeb3EaQFes6aXWp9es8vugUl4rzeapfoWQD8efT8V6Rjv8eWPFsKBOrfJkXwApcwu9lo3.BAE_MbHrAy8044C2VErpJBJgfNz2lzQvJnkHqSfx3eIU9ynrg44hwRwzLpZjsrTBv8wAq.4z7hHeVRWA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9135688d3c7ba042';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=unmanned%20aerial%20vehicle&__cf_chl_rt_tk=kXhxfNZ68bCWU0vqyaSb5bGs9KLocVF.G2coO_Qj5Do-1739791438-1.0.1.1-zd7Ra4IwQa5bzzXKQ1aYv7YlIqjjGHqsMOv0CrJ7g4c" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>