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: '913558d798a2f938',cH: 'GubCkImV6CSjc5sGR8G_16fRRHmK3epH.qr03nuo7AI-1739790795-1.2.1.1-.tVvYohuQSmDSHKLDcyTES_cGnDYmS6sJ7dt8IxBTDUdPkfzZu3NaMOPPfnFGI0E',cUPMDTk: "\/search?q=stress%20factors&__cf_chl_tk=6nyxOXM4sPFi_uYB19yO6IxSaqF24_PINMtlhyG2hrk-1739790795-1.0.1.1-ZhFDvca.VP8oecUl4NPEuUc6N0GgBOMft5hcqRi55a4",cFPWv: 'b',cITimeS: '1739790795',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search?q=stress%20factors&__cf_chl_f_tk=6nyxOXM4sPFi_uYB19yO6IxSaqF24_PINMtlhyG2hrk-1739790795-1.0.1.1-ZhFDvca.VP8oecUl4NPEuUc6N0GgBOMft5hcqRi55a4",md: "6zenTU.dnSUkcO31CwesXTxOLdqsitcGMIAec3uhqzw-1739790795-1.2.1.1-IfYLM_JZRJofONJGxnvaEHQ2xzYZqXn74zmcJcl9Jms3bcHISVrrSkAAWA2JQhfRT7yqg9JmII5ifNTirGQ3sMTkMtA3vrJQxaJr1.vgbhEpw1efJaEqK35VH4amVQgZluo7d.7t8NcCVxFls1huZU2U6EInNuB2HJkC0EseAfAfodKve3Z7F3Y5spiCKJW0iAk.ucCSWKzV6nineO5ixCV35DOGHF0cMWg_MUPH8II1knZ_GxARFEyDPRGUKj._IPIQOzz7YbxGx7BIQNwErXzFC4ptw633LIdTzqJ5OAgIAbYU7iybvHyATnJ3J7a.u8ndxKLrFYV_9rtuuE75Uuqe8rtlFeCfvFBdHUrIm9BebrhYsuhcOWNyLxbYcgT4uXP9zEfavhBPXZ6p_o2jwaWDzlaiUAJKIHi2Y_l6gVZElm028642B8OOg3.GZaB1_iHFAdWr8lJBoilwFMWkoBwaWxdpxsU2Mu2CCP9o4EgGoHPBiEjiq70slvsJXIhSuFlsCTvpG7WH7nlmCClu0lVgDYewdJ6e9AZ4crNHhauDv8NpawVFFR6qm55WQ_1Tlwh..4tLbRzLgE8k4BPXWbysXAlvewcnWpzvM6U4ZAMMMndyrZToKrwyaIjgBJPTH.5ynBJQd.v0yMZ_9NTIqEw7B636E4DIdWNUevRN53312XVMaBtjXhYUYhNIkX9QneX3P2na5_9jdZaGKJJRv0CexdEWTeS9IAkszfzTglCK8zTdw_1Z1a4mCzu5fSbaaV3YasM8diGkO9YPnGT.I28iKmJ2EanpZtWsdWUwEsBLagH0sRTO860g2b2bX.lqv_GblazrcdNYok2SDkqRHltxd4OwcWcejwZrW.E7pCbN4Rg8he7KlxEStjwYwShUlVDP4STI.CUvG6VGSec8_7WbM9SWlcbqKhLyIxnVcCfEOrIg0Jyt9Lpmjcbvx_8UwFV5ABxuXyeXZBzRngmRHHZEwC.BYuE2PyU3OaHamt9QfM3omhBvyZTkQnfR8FmCytzYiDW7Gjs.wAWHzU6jD.10dSgZ0OQ0NfOfdB.2zjp3vOgq1YsVUPiOwd31nVYJa.JLnOAufmaiy7Iu8qvnUTAPO2fZi3vB5c68Y1_OkzXr8_kZFksvWfKCEtCVha_h0Y__zpgob8yBNfb7R667i53YVvt4mKV5hhNLq7DM_JNhUPq3adqbYDP_jBP7tJyhrXBOgot3uxMiK344VegLs1cCqe0urkNuWd3y4uyqQ03g8HXyYouxq2y1UoChntybWRx7mrHgYXna0paNTtDsYNd6P4nZldVf3c2yXQs6KC4TwEw5eFggNmvWQIoZdkdszJZXjYSIFdA2Z49qFG5GjGMlEN9rRlsT48Z8jxoQFJi6FuBjbs1logi2UWY7rEwTyhr1ekkqv7rpGQL6TAju6ws.hDrZnz_WCi3DUQ20sAwkRM9bll87rWxo2mpr1rrEkh74TzKN7abXT6Jh6gK5.CJfJkLulaFaUOFs0jhlshF.lC2UumEw3znFNmHuyzuwvYuC4D0taSpEQSq_8w2EK.PCrzm5ssLiW.4WAnDd_m7tMrc66XnQaIDVl5tjyft_rWeF5g0dGmxBhX75rkd._iSMGwqwt5cb.HA..Nk92MufhmYrwDPLtQwSt5D13aNBeAfjtIWrDICSjbBs.GOdYgpIlzEf_T30_zCrYTPj7iG7AoadnRarINfr9Us8lTYzKgTxoGVLrg3glBnEcvc9HxJKXFramdL9zh4N3CoXAnFLc50rfw7g32RIWqqIU_SEJxXKVq8xZW.UpuLWlWDS4aXW7WMDaTp0SJ.9Z9jwuvdIQu1Sl_3N7zSJ2Y83GLcvJjHnmN6.TIcpKMIdmFYahORfhjDFWQIO5eJtf9tV7A6E7x1J196tVYcfkoKOAOOkHOKZfprPRc_M5VnfD.gKVw",mdrd: "X7wYHxXnYNLAePGI5GEaXTHpWmI2cjYvUssbsTWELMY-1739790795-1.2.1.1-wgO2fyXy9MIBuxztsaG3YD5VOYbBmN3NkBmeHsfb3nnKshhJRzV94vOOs_4t78xhRs08xcaAO9pGMIsU_XkF4JWKZ9kOztA9P0ksmSBsoi_sTP9UV0TumtEoQPvpzp7i7yKyFtPMITWhhnonCLe7VSbT7.ECDiberuIrCpXYdqrj04UmN6Dsj8k3Opf54HMNw8nECzSGiJ8f7U3nzkXMOTEhSxuLNY5zD4x63QNGmVF8fs5MI9kK9kfEc3cjDra7IZ278ZNtjg7.uA_vly6Iz92XSpC9Ngp8FVmeu4X5NvaBQjzjBGA7WmFuezQBJQrw0_oejnxdSz76Q6I2acVibZBfZrWpbT.iO7uiqspKyYo19MfZlp_dXuLugpHays1e2ghJLVmdfQPI5PAPfOovUdnseT9Zk.2sVQXvIsJSllFgAmjgS0mSEFNVvewa1TqhzgmiN4uBZhdshU0R64XJ.ymVXaFQ6fTBolUm193f.dgCbq_4E.LXgU4q89aTAX019f_mO5iEMWPKI9lGa9V6ftdGjx.Q2UFwCmrTtxzDxtUkcDHZPbRZzbiduD4VCoZndXGMaB_IKFQllJDBhoCBKX_X75i8ynvGtw6yOOO30xaAh0SQI9FLY7sFhGZRnYtlPF.vDnAvA1p8CKfkSqWHIJ9anXnc4M_OiLTx84Us72bOBFbnppWN.IIp30Nr1DaP40hP2YNOKZ_I.C6Ajp1fXy1UbnpVfcH0otKugAG2BdlBLKKXVjqnUhJORbbKVmph8_Vk_3yr0gkOmk8ghzDMRRhrtmP9j.oGaFumPY8Ha9DoonnK12JHfTgMiyGZmrXOodz49Zs6jNmC0Og6FP71kLgXVOx0_KqtQ4iB.SewFQzzrVdq7YDilMtqNNLvEREHjwqLA8klWs9i4e9hc7KG8XFmctqVDVQpRXTo2ryt3OvFMHlKQ.gOrWAhN_CQFGBZMmgBRw8Pf868Z_1JFhe2oaVZhvWS_bazWHj0pzK9dgnKg.R5p_LwXVGRk0p.a6jAd3aCpVKpfiYge1PB0cVy801TZEsQlBMmqrfxXxTICNrZogTVMau.6Noa6TYdPTP6vQS5jriv7KiVifHn7W6.MWWz3jUE7alNS2P5SB_28R625FkvgZ6ly5N1HFTjGLlbm_eTUR5BKxawqaAky.T.eCse0rspCm1q7sEK0izMl5kQxrSjG4F4LA3loIHh0pv5bfcQioz5Nm5qW6RxS3eNSoaTlpEJQxi1vRTcbu0UeUOKTl5y4sMtkVdXczKw3H5W.WcjJQ5y9v4bDsQ_5caf6KXoZSn19vbr03ipWQ9EBUmi0aIWQ4P6xGtEqkFQ5PwlgV1hF86zyH_78l3d_lESSZ7lJwStCROKlrQxG4wyjKIX4X5rgb_g9MpWra8CZyDunW8nf78xlhbkdbjCgsAjXYdzJ4r0ZNmgL_dmOQ2kNi6ixj8o3wXhIFJl15zebU0eZ7x1lrCaRVe6Qjozy3nyNGYfH6JCutFyyKtFp3GN5LkoaA5BbDppCDxUfmtMartFpDVzZ4hH7fZwDcOWch0z.A9yx0tDVsNXV3BPi26afeI.Si7zSyzM4HNIzxcmWdnPIL_qtaiFaZgBVzKvWKL0F23ZDcLGwxQvCwwNA.n_u1ZPFV5LgkF0zBi.5DFyHWQs8SgMZFojCUy1E.M1jSm7hinIt5SDF4Rbw3kNjEYBIRr3tWvmQXU1G2vBhrxGKtCrI2Tk3Iab16nz.BSCi08FJninlCY6MxwhANvH972gpCkT.I2tzprMomdjkgsw4vDrzWR7QKAR3kfvHXd0L1AN_4Dfa6ny48087bIovz18.x54q.Ui7WFOMfecYzj_UDU3Of0Hok6t6T.5a.q6sSyDbX29Ofv3lRFN67cBgZ1WHQg.YoSvRpwP86hx2a19BPTJJpyH7YjJ5luyM5_86OfqXUyby_CqMiKn.8LevxCQHK2ZcXtaxPhgrjq_8T66qwxUX0IUbb7Jp8pv1.9dLU2rmw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913558d798a2f938';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=stress%20factors&__cf_chl_rt_tk=6nyxOXM4sPFi_uYB19yO6IxSaqF24_PINMtlhyG2hrk-1739790795-1.0.1.1-ZhFDvca.VP8oecUl4NPEuUc6N0GgBOMft5hcqRi55a4" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>