CINXE.COM
Just a moment...
<!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: '9134ee87ecb43e14',cH: '4LFxJEMkgvwAu4Q7RPA0ZeY1bKhEhvdDnP1brRzC9NY-1739786440-1.2.1.1-n9v.A5ziw5nUg6H0i35KnpDtHeZN.zi.IFTcdyB.Natbc1IzGFGoo4.822g.VV76',cUPMDTk: "\/abstracts\/search?q=polarity&__cf_chl_tk=U8qfuewYBeFcY5c4CmZDaLWB4svpvd9Y5b9f.cN_yV4-1739786440-1.0.1.1-ZfN2mTl7BnnbdQUPyLcWPTO7ibY6oprNDbOJUq9ZV8Y",cFPWv: 'b',cITimeS: '1739786440',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=polarity&__cf_chl_f_tk=U8qfuewYBeFcY5c4CmZDaLWB4svpvd9Y5b9f.cN_yV4-1739786440-1.0.1.1-ZfN2mTl7BnnbdQUPyLcWPTO7ibY6oprNDbOJUq9ZV8Y",md: "Ym7Hi0.4d5kBzqEs8rwchIWfTnrRKEvkpSE9HtOaTMA-1739786440-1.2.1.1-YiVcPsUjw9nZMhS3aebSGYuC82vStCL9rx.wgNPmpwjIHRQOZQDce2taQYbZU_FHmBinBq8DfBZoZjhLLUB_OF2JJRHygXzasET6e1VTpqYYv1BO96Xuq4We15QWUuiqiBPRW3rdWVYWOHMRfjXZNtoqs6CsoQOWHfzOuk2_AMkLHmJZN64tgcU0garVbyMW9PFQNnghsUAQkItzYLGPEVtbSc_6qfFR8cHoOoEen0tt2FGOGd9XE2vW7gsntFJ42.zCtbITSc2JujYJghFe5PtV1r0CDXcye1SVPAWJjNToSvHhEqazzsMcJ2RattcfQcndLqb24tznBlJHg5ztW7VgOaqx45RiHXyz9IdahmWB2Mim_FyW8dPVWmh_hTxBfPZ3PkhIv.HbRmS2ZnCC_syQ7_Cuv6xgtM1KDhWDRzB37H93dBCC2oS_nNpxiJO2zCFYc8tX4iLnGtH.8WagFR2uEv_r9kKpJQq07g0lePcICpIgYz40lDaPx.j5RXrlkZhZU9p8GcNyJSy1rEnsKlpi4lEgOYRUHaz7hYiv_Hxcz.02bfETEAMWZ4.3tn4ri4VyxL2NoWDtJneGjA2L.BKIp3Zy2WcfCwhtjyVLsKqlZtKvvZlSZ.bQwPtzuWS2qgcy_II9HnooLhETro0Y7xdY7Ne.yh45nERXw7C799F4klwp3Fy4ogNWnln04E3iAvP6QJQUhsyLpuPQiHfhwYQutNhofNAcE5RPYMcRDAo9swv.WYSL.6GSdmp0B7_3vuMlEKTws1eB8WOl2u7uBDCZ2W110rtUm9p_8dkOeZCd5bj4ZNdqo_YkhKz4qGhizEk.6Y2UpK.ByL9Ok28Tx4hcy.gOvglQdggt1bPS4mWuGgdsNEBzSux0HnHgAuQ.hPLAGP1N2mwOZ3NP9IocFs4REUWGTpCDykh3uGYmITx8YoH.5ZByxhUMQCJ4W05.KhnbTHsSFXQoRC9h515IKr5KMaAUjqIzFLDOAYgmnrJ6sbTyrjhN2nV9xnqeFdnz1cKFwJniWkohiWIySQfQrUR9dsd5rqFWp3wJAJnP9kH3RO5uZVPx05BKznOK7kBylELZ_TGgXQMDUEbsmkObUaId66sPPIU8D5.t9WOiMNFYokH9j.SndBnLGclhEGYAi1Uz2lAMAixJtx8seLBUgr5IwA395I1wqS.dd37ufA0F8ANPDw9ePFUkJwziEVleMGXs7z9VVvNhY3cTGWVmUa4XBrGCMmUgp73J1b._ElAozn8QwcBSiDgaREXtrpOviErHd454eI5J4yL_YSkpSrVtd1rMm1WoNAMKxiYRD0agy_bbGJxB1R3reAW0e9X8Eby5J4EH1rOJiWP3MxMiHM69pc85nVuLMLIuALpzhpuWHgpcUYVg7E38rnWWziU.1s5Rme6mTwf_L27L9eQkenkz_n_76L0fk9rIv05H28_i49jpRrWwJ5qhOhExiW0VFKhWtQkNuJykC2.1ggEYr1WkiIAy7Pf348e95Ajof0kOFi3nO5L3mLYCv_.7j361RJASlcS4OwFpMf7eR1grXAttHxB.IZKoK_m6uppPzFXVlGR4rPqSB0vwRyu_HnqenjnjGB7rqqY37DMbxSXc0.YSTJ3LWV6r8Xrq7hk6ObnyupMUwiUFPljOevw0nNxvRVFY.dPsrFen28t1WNc1Pk.3h6HM480K.YEnnl_PvEh_AUMryPJ_4ClMjXcMUV9yjsyJw9Uh5q4tz_WrcIPUcxeKE02hw882CuJ0sB8Mj_rBrCtHSmoZyi4Kx9GL7tT75onzpFj6visuiYFCYCMLhq_zWGRrkWfGpDYZNbrAJCURYo7tlIHVcKfZuq7.b5e.GA8YPeQOO1kMjfQTpPLa2lMINS_PYAkuAJbILKTLA7AlPE.fMCPhiRtJF_DBW_s_ZEHTbPu.lOJ32z220zSXhQ",mdrd: "xEaxD__zoMcBBEg0suQVJRxCfD9jxJaoetm8sf81B64-1739786440-1.2.1.1-d5zDxuPHQWhDGhREBWGM803bCA7Gf.eD8uArMlrdUheJaZSwdXEior3I6.ia9aja6x2BPX9MLtCaek2I2PZ5xEYuyJ8rg.hcgHlQWVVO2ZpQlHZhoY1Gu2w_hk2UarQszZmZT.9877xuZ8JwhgSs9DgYA.4Zc_K6eVHFCDK0UDTm1b2lcLLwNMwtWbmMhJ4ZMmRCbce3iUXp6rsYtWkis4MlQPENHWoZbTRdBPaQV40EQ_bzypuc0caTIiN2WPay7H6ubsY_RVFoIwWaRLqRUy4j3_iUQKSaf5Jun01ykXCTqIBRKPPvuiRPReqn4Msg7oQjQjbWH_VDWWuetq3ItVP5sXxbDXdW4iQWVNk7ZfK6p3TTkGSqatj4VKPH9DxEFHUlRPXxNw3dMEbcSJLU5Nrt3tXvFzTHdQensyYivBHam51Lr6jXNqKfW1FCY.uZULob45uyUJTjcSfH4O2LX93ZN_oYwak6OPu0yxdinr63WkBfBYWmLsyYw8h8x8l4uOulhvDuTXSfy1vjkuE.GCz_hrxC1TYezaWcFG2nTdQBwmdlYeOR9RUDtvABA_Md1lrpLC58T5YCkCPos.c0EyTCV9psVFvuhVPkJawG887xcXDK1HsvTYIfSJ3Fs.IWb8q2nf9qvvJTN5dea1q5mHb8jUNDuvXDTFIsw_5jyJj7lSoWvrLTYRBEqpHTEiszRS8zHpWxK6ZfXifJcx.1_DSM7y.AJGdceQk07h8Ujdts5TqwWDyb35VO2535o6pok8dDkN7j1gwZ9bhtdwIp91Il226Unyb.j9iQ8yOg7_cJBlwHANImoApmfV0L5mkHt2VbSL9OjgZFBlba1qmd2cYhNYgW8gleJEegTcLwijnVmxRBgQ1JWhpQrbEQk..t8ECdSzxbBKNl6QW71Bneus8SIcIuhSj4jYa1eociMoN0sPkBXqPA8Z.EGNbdvTdLiBqqx8i4G1ru7zSxrHCreBnUqgYXqfAsUrD0CtFYlaUpup.3cUa.EzDwcFzQSPfFaHK9y5_qvpl_F98QELQQEaXOv95u1uLyjPRz_fUlg0c0H83OFICSYBhtRD_6ZYl0E0a1eUYHX1fxn_rvc.L.1Kc3ZrEX1poVkDDLoQpqH2jI2eSG2X2UKVklTen2l6LjPup428zWlDhZUx47YVQE0p8ukH2YQn8quCiV9f.H6Bs9eFFzM5gMoS01XjdHJzNrVEM4_3HdU73W4F8DekIMCzE9OpDAZatg4zmsW4.FF0ivxwBzYBdyvi0r2itC2cuuH4N2AorogXptTqOZ3gMQ_nDTJnmjLQKQUpLUk3Xh1P3t8R8F8Ga7z7XtmqnQhyL7.lfYL4NokRXY7uTiZ4iOaf3MVhrm0p2iAXFuzc_xPS48H0JA7qdYgI2Mv3gxc7ZCzQWrCqzmLwlH4LM7BonBoU2fCKpV_z_vukogJpClLhuv47r3mgde70zgBB1wEhFRgeyqRRVhQzUOrrHgt6FUxa2VrZSTUPssD37JVbeXpnd8XCGdKT7R3YxPUqWJYoPkmpfrdJRUj.LuMIYTF4pLcudp.Cgb.kFGnClmKqrvdknywpRqHJ3FB7AxoF2jXOvMhB26wqPC..j4wbD1GbGekNme9Ypl1Xbs6Sjvx_QFsrypP.taVuCh0_0SR.cBZTZPCl6DipPLGP_2oKIpUB4pW2mDZp0xprwOrwtm2TiGutR3Utx7h6QW0felr77xZ.7pka2VgyfQZ8Bk83HBQfwAAJBX8XVzmPKPswHmS6cJPWNRfxHXPsE4Q_9kufjLyeBV69kxy7e7fUWWXmDkPLqMNU.8ESYr7nIiWEA6bgUjxcMqRIweHydoSCO.3CaVmgqy7ZsWCosMqsxd50G6CY5pbowh2XPpwyImHYNnRtqfSvnkwIwfzAVF5UzpSYQ5Y3OPlHG3wFbvGA76uU7MvMmU9HwFhQlmOJIpXG6_y730Gv6hcsHzpIb29MatVG20PJVXnDHIBufaOXqUgMVLk_Tibw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9134ee87ecb43e14';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=polarity&__cf_chl_rt_tk=U8qfuewYBeFcY5c4CmZDaLWB4svpvd9Y5b9f.cN_yV4-1739786440-1.0.1.1-ZfN2mTl7BnnbdQUPyLcWPTO7ibY6oprNDbOJUq9ZV8Y" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>