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: '9136f68cffb73e59',cH: 'tltZ8xxRuUtACL3kLH_U9mK2saN6Fz9CFXsX9F7g_AM-1739807740-1.2.1.1-ICmuVGnYn1X83IPmtxO2bMGFTdtMeM7Eash1G6H7Qh7AIwmZXUT3pwcymaNQFJIZ',cUPMDTk: "\/abstracts\/search?q=rockfall%20alert%20system&__cf_chl_tk=QuZC3pp.s.ilHKzY8CnMrgN8W8V7BuqznJI_CZCEbu4-1739807740-1.0.1.1-wQGFIeBF._E_f0zzXItdYYq3Q3ccpZwRkytIJnWXQmE",cFPWv: 'g',cITimeS: '1739807740',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=rockfall%20alert%20system&__cf_chl_f_tk=QuZC3pp.s.ilHKzY8CnMrgN8W8V7BuqznJI_CZCEbu4-1739807740-1.0.1.1-wQGFIeBF._E_f0zzXItdYYq3Q3ccpZwRkytIJnWXQmE",md: "alSnWKdYxCjtp2gFH8jgGo76GRNnsBuwZKR3TfmwoJo-1739807740-1.2.1.1-d__ToHU..vjkA_sHX6h0tuje0vopatPwe0vWzsei7P8MGNEJO6WgJbokURUkGX0Bzi1D5R8ykIQxD7fKwG08kw6cjxSzF9UjgsdI1n8.v5nWP8WbtxRGmRMDB99fJGZNRn9Y7AkQ7b0PBaMoT5OI.yxJcmd4DCz_RYW7DSkJI5xva0JLWFLJ559BferS_3Hjl2lU.xaF3.MmIxX0OOLAm6C8VX84aOYVXQMRAAfv2_41vZmLr1owO7xTUbWJq4OojiimXyJ8kGeUy7pdLYpJVDLqGeMP1WLc4XzkuhgrQSetLG3mK9hYetZHATLMtVMuo3HUWqWS4BlLMyFnPf4L2tVd9q87fZ0uG7qcuOSVHKtjPx7P0cOJ7KFApjrfnJOO.AduahSCgTDAf.9pkiwO1gfA19OLBUEbLtaA4dzMQU2.X2obDzqXJ8IQqE.ebH2wEcJW3H6ZGTkrOlsdWKgFYmfjNqVDL99onifoyj2JluG1gBOgG7XTg1M5FT3trNZ6hgqNQvBj87xaW5UiapziOJKpl3s5Gl1K1aMFs0zdqHItWZv183HLRg_rohPe.43c12vqXAX7BDOLo6._.OJ8IW5.DhbxYFcaX97lLuM0FvMfL9CnNV3WzleKuWwGXO5cENE7huJE7Dz.GBftljXtWWle.aKmDZiP.xJ0VF7EwfHG3juWdOGrx1H6oZdANNangtIZr8aNgd4hzkIOxX6B_7KrKUgDyHXDda86DPg6ZWNmuLLIDHnuaPG6Hsf_7dQ0kY7bNNL5ne3HTHDaUHVf2nNodeML3_EJWA4MkPh7pJxVSZpZfB16QhAl0UNDhxBgexdGpjix9fuDhuld1cgA2NjA_qRugGlwDRFVVkR50zQdPvWM3UvImP5Uos3NQqfdvaT2nf3nMsrMQF7ikkSYrKaTqqGQIhAo2LtuEuXRfoQTrzWHaSzvHLMHWsV5hDMkpr5po5kHxWlTqOgl4PX0G0IT83ses51JqcAQjwb7XMjHgta_zK8XI6U8GQ_LkHOXOp.kuCdlzKb4NmgUOAZeAz6qWdU0.FYQ8s7.FI76UglVf9ooR3zn0q6Vk6N2VgDrzwTPNUT61SeUmPtmqO0sWVJfsFTiBZBhiD7joaCxQgk4FQT7tMq0Y.URhF9LDatPxdfOj3_gLD6ct_NmaxL7kRmF95hbDqvHi9Wwktw4UL96aG.V.NrApdPO4DXJFJ5ldxWD7Ixh_vpJr3K79qEKt927RZVL8uO8QxgAWHzx4rJ.m71zfm65BtxvX7_Q7pG9jh.lDeBbQrxUG49wsfnC4lIiL.hY0rfvfZvuq2xwo3tpcC1jQBro4L5F.Oz93wR6UvyP.rs._.2DL0JwDSHf5szrjdmi_4ojpOGN.aKGnUpOmICUGVghysDF_J7aynZgWFIh30SqJgF0l0xUmOFX_p3H0oQIJEk5vcYG4Rkr5P3rz1IoGpvbzoVCJdz7p0bU11LfWYc_Q.7p1sEsTNFGwT_zdIV8oCeDVbmY8CSGXaMb8LShfRmk1IvykJKwwBz1rmrELjStMg2OcVHmE9l4wcayx1SAhuG.QS7RRNvRlmzFy4BZeL5sbQ7gSFTqu8ZImJcSdNA9xn6_MBvyqCkoZgzkRdp.bdOjTMlpZFwl17FqGSyymRAwgsOzMOZi.aMyhk_203wp9ivKyNXdeEXMk6PSBJmGKY1DEst50ut68L29KiZuX.EXI3K13k.XV5KN8HX5vcZ3pxmfM1Le9UrHsPDCPjC5UvCI2Naeh3cuTvMhViACvA370DDE2mk5bxpeKdxTbn3ziey4ILhbohM52KYMhwAMehesRAM5gQlYTF_f9x2HOXzCOqtyaD484atyMsUWoqszoo_JERVPxxwMZpQCTj_b7ENp2PeHNV.91visWN2rpRvxwdtqLeoHy42ufHU.it6NDxxT8j3_vKHu1kW3ezL3oNCTSGlrtvFohQumX.7uM5jTDxpfOck0KrwF",mdrd: "b1Aq3PvYOvCNtWNLvTyxvrqwHWl19YqyRnQWaSSuUf0-1739807740-1.2.1.1-4EsFGkwkWw.lOB8XbXLWG33eplQCNk7LnEy5.DyhwZQSm1LHiKDdX2G_bkClHosXGo2kfazhEPnwJYFVBUk9yb0qr9u_cZzkoASMpYJLD2oFEYya4jKVxiQqnhli36lGDJTWK.7_BaNEymV56qTy2y9dEx8c.0Ya72IkWJSoTkci_t8Ay.HdHGpP5QO.I77GNHoEySLF1fHnZpa3M.Pi4bmnHGaKkwUMxthcG4xuAMx52ecNSU1Temn9qNm5gwzKHN8AKXa7JqvqPet3F1wc_l6jZrODb2ZS9e1e6j3JPSS3UHxNH62Nrzd9fyV8wX4jZyxQLmzzef0yaFm1dT88vtihXfyorJHBM_oPrRirKENlKcHfZtZhkk8DR4THFSzscYaQlbI8KZBGAdfgMSioZlCZKqp7974InulzxVucW7w_Y4t3N3v73_omKTq0GYiPB9AMQ0cs0mWeLcuQpwySz28g3Mrxzdba8dh8YIwqVnUZzJaw0rzRbAOYbTjdqxhq2zztXnL9_gQ_frJyhmQ4QDC9p_umnmOoptzmb4dluSlqkgRhquMWHtlPVmWGzphqDthlpqZ_fVdePO8ncC2rQEXLOkTIJ322BE7lQTci19pMQZ8UhkHisi81HF4.WdrZtzbaJmK0vYlIHvxG6bJj6mdL2zFNJEXO5RsvPMZE6oLUD4k_P2P3eOL7QooNJxp7EjNQZH3xmktgOc2Bp0Jp3yt6aUVJH_xnPSDcnEwvz_YuHpKtYoCQePX9V8djT.622wqpO7CKcI_L9cncC45tpCzn.LI8X8c8AzZKsMbsKYWW30kDdymmDDn80on.xxyWNEy1eS4IJmHjuvwStWrfwdc8t9puEkzqeOC4su_c_P2OqmIxx3OL3hk4SK5yP3vPupiaufxTrxxM_kw7JAhae9EVTVI1WIwD.FNSO_kwsdTNnkCWai7T8ns89geDXZPBDxZZX3rh8XAyX7zBfBD0B0zED.PZN80FSLj0weYS9hRs.JpqGK9iTfk_mx24LuB2EeuL40at4tM6NELO74BWoRxVqAXWTXbd3uIO8ZmPx8n7ZsnEvZlAekLlxqbn_FcKI8xY5SBbbjTVUXckEMeSSMiBuR0t4STF.TsjJ39vmFogoYms9PlfMgM2oJTBgW58wmUpIQHxUZHibKc2sphZ_u0Xp8hsGhj4wowvsxMQoYMtg2bN3pyIwQG5o4SKfBjMhp3pFYEyrhUnyJXSNITccfFhLjU6zKdsDchsqMnS2szT8bx57I4CjYMh40_3kNpEz8YSJahA2t3E3K3AgpcM.l23mTJg3pf7Fq5g4f5Pq8KojigZNJ.Vk_hV9UgJtw0DxvJkHgt__827U8lTikCk4ciiGclN2dl_.m3hCXhsAa43qY94pJ7rJZBs1JhfGAys.QN9hsQwSM9RpBpB2brRYQIGa6g8M_L2zUlf1.3qzx9X6dPU3c_JgG.rXIcpkLemhh6c0HoOR.jSWkUvrO3BGcnzSVBFdrmJtFhMzImMvh9c_4YorhlLRVspRCLNEK7mUym94q.SmMbP9pZoOq7Xkli4w4r5vnVZNagV1CxWSiPbOp2tsuVsVadcf9RlP8cTxkX.UtPor8UNKD3cgJPXT2EWfV34mXqqi1O.2lWTK1o7BRUesGKXR3l5WoR7Ph0NtXKKFn9igZLMV5.IH5a37LHgfArEg7m7n1j5gQ142DwFYUsMFRILJ08vTQrqiYibiPWSHhmCi3DJnrORxAEOjyEfRZEyi.xiuhy37a4_aSglR3vbk1cIuzCnTMZlOCLfSIcWpIemNsynT7hpNoPZ9vo60.23iLGwsaOOToV05ty.eTpP_PZeTm4hTSUfXSPrMud0G0enTEDPSsCTrbxBp8iLXShR1KK5oAnqRQ5u4J1SpwzStWBf9CUAMoBx2Vh823OZKQK0jp.pvfXlf99wqVwMAoqJEZPgN8vERy5DAA.UpNjYx2KBQ4AxfJDLhke_MZ0VDPEXhHMWx_Z08zOFRQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9136f68cffb73e59';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=rockfall%20alert%20system&__cf_chl_rt_tk=QuZC3pp.s.ilHKzY8CnMrgN8W8V7BuqznJI_CZCEbu4-1739807740-1.0.1.1-wQGFIeBF._E_f0zzXItdYYq3Q3ccpZwRkytIJnWXQmE" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>