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: '913581330c9812b0',cH: 'zY5SOrXt1Hp4ZxORtX61DeZoZBcPAQC8yiEFW_UOLZM-1739792448-1.2.1.1-22v6UvUL8zSSVwkBlXE0SpY4FxjswwYzcQwd.Ae6MNlN0.ExnA.7AlyNPCcFKFXq',cUPMDTk: "\/abstracts\/search?q=Nelum%20Chathuranga%20Amarasena&__cf_chl_tk=qffipvYU.rXA05eM0AcdMhyBEvkvdKlthZck.F8xIow-1739792448-1.0.1.1-KWLOqk8WKTQ9U7m2vhL9EMkjFJpd6muibcvciDlPTro",cFPWv: 'b',cITimeS: '1739792448',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Nelum%20Chathuranga%20Amarasena&__cf_chl_f_tk=qffipvYU.rXA05eM0AcdMhyBEvkvdKlthZck.F8xIow-1739792448-1.0.1.1-KWLOqk8WKTQ9U7m2vhL9EMkjFJpd6muibcvciDlPTro",md: "mmUvQK.4KRb_ABSk8MFGOexA3vbRh3TtoY2hMUJcPAU-1739792448-1.2.1.1-b0zLCulntCt.nQie0lNjSerSPnQXux_tR5Bf6u0gOIYqxQHopQ3Gfsja1orf_AazxeVHHs3FprxrXGb5VoIHdAZOJgPPLsEO0.0.XVeUEqxlqbPJ_Kyny_JtUhxnun5igOQP1OgqgRmuxpuAQkNroeYBqPln8KWou1XzlQTrXuAcA6HB2hPoPNbeS8Z2DEbGduowsfigEiFUfZVN6OxJWNK8t7L12Tm2f7CA4n88PJ35JVVEJTz7twrOureCcjRFTF5juLI7J4LsOSEh1nCgdiLQvb2ukDSZycSmJTb7okc9noOzrI3RcC8Oz2c7TjsUP97vlsnTCLndTApjs.SuwuGA3387NsbVKZUR2JzLX1QGxuKWvoKFTURXRuyHeOoEmmxhYHkv48FPcOH3xOCs1YJn0bS3pZ8MUp4kh.YLwDBaziUoo4o46Lm6q3htMkPe4JUgBsqkBybzFMhbpdsNfAhpSvUGggQKKq4.DX_m3MVivCIqrI2ULxXN8ecxppNXW2J4U03Fah7xQeJt0sHM6Lnbz4rbujhniacGmle1zUCCB_7NfHeapeGkymurRtNgMAp.4VZqtbD.qDKshzom8PDdVVbX.8ZsAtyfGhy2b0tm6tnKX8PUyUghjFlmQPuGRqmwpu6Xo01tvcjAsJ7IqUjutKyKCqt72YHf8TRghXzJBNwTkE21fOjAW7.9RC_1BIZacCdUQURNCuqoBiLbQhLtMas.Caw5Fy5hXm7pcs6Sff54koRXMTrSJY8op3_UQ5AiDIarvkhdWI6.Se.7NaPEcsSh3YderZUQMz11zAKt0kVZCQn3V2z2rmEApz9uEzA8xoD4WjG06hiDCU31zStHv5jNuQi6UIRqBAnw42L46WVEZZLaBCIlPatANo7D53T2Dc6eLNmZNB_X89URofpo_aLQgGcUWh4bnULQx0.LVl9g_jOHCEzhylkppkuDDdDhxp6_S_3.qRdcNii3FkIqfYmTgLrvJ4yZ47am4jXZ1AcRNfPB0RQ8YXlrjl29NN4UpznWIn7dUEuiacqbQDGNfzYIbn9lgcVirsH4EWfrZRdX8GLJM4gI7lBKKU0KXU1_VGAYn2_SXp4BEg5abBZkugDHl.GvaUdg_ofOPZxaRLy3c6_Qlhh2TYYYN508YTQ7KqW62LKNCom8_7MOT90Xlfiedp9gBAT3YLoNBDdYGxKyy1EA8TroKw6p2MFGF4u3_gRqGLm7AXra_fgAvBc3a9hNA2nAJ7Htggghx01nP4ny5Bc1WH6ZCy4zMsRqdX_Xu44QZbfLbffZ9Mzeeyqb9FGvrH4hQzB7D0XvryHGVQ9gOu.R39ptRYJzXyIHE64cKwQKf8fPgFzvcDOM4DoRa6VlTYi7Pzbn_5VsOM_HNB616SYVfXjFcC1aVC6AWMksZ8d90.bBv38zaaOr.3HEQVRwRBzPaycBDX4YRqNPPkg_LNFf5ohwJHi9C6t2MtMBxlBwg3Z2KlUZ2kLeYojJ8fPiBPr1wHlxIy_NpruWrunwKgF_OfHOLYMkZ9113QClgi9hmogQHnyC_Dd4DGJEfUvLVFAqlSkwxAysWRJjSu0vKRsRx1SRmWngmXoyCuHpwh8DF4LGk90nNySb2_.qENPgbrMPrB4XCyhZGznbiFEcjy_iJN1q7kntxA9ihyVfsuKtQzUBT6U8nsr16w.VwikvGcC5IwG998_Pgfw.SM_6arFI6qaB8HjJg0bcGr6cxin5GxA8PFpNSwJf5G2YxsCKgexA4TaMuM8oZcGLozQGjH00ogqVarKW8qhO83hHVhLj4GlzaSWtyhR552vdwJt.Mk2hjCKXOmFLkDHzLEq69y6XOsUUOXJcJbrOoqBf2Ox1MmyErp1cGlnAdAYgX2EOo6.99xaxsw7qlkSsgzlu9dKOk.4qMWx5eF41LA1f5uF3J0cQCJfYT9uJ_Y51xAG8Rgkzd817fAtmQaM8ZHZH59Vnl7g_9BS7JFWum0h2KGRt6FrLJlNdPWJxJA",mdrd: "ZtileYca4ieXzaAAbgNAPtQL0o90rcnBdWeXPTPi_1A-1739792448-1.2.1.1-rpQyZfiMCeuSVcF2ETrPtC4f9HOlCfZNoJQ.9iNtO0fg346Aalr3UFpcByQJwGhc.h87WoC0JPPXDUFvpxuuezNeCo7AGHAc8VOfO6afVtkE6BkNXAcYe_bbUaQH7FIU9vP.Q1ncox.LvDn36MUKPJbw_BH8ckhqAyRMNIW2FnaYNXeX9UCqH2nmAlIAaYMLiCBU60_OcLw075LSEVG5aSbr.3wIajdFecUTFqs9vbVZhoQceSTsRmARzG2Y3zOd0JmgACGt9nicozX3WNSaezP3TcU4djPErePfWnUw_otDRCoe73FtQRb1AFVyn4ZT3eHuVwlfNfE0DMgDGuW_4l9krNpMRh_qTRVcoQzKenu14LnrMDu23rt57vs9GVxRMpU_7HyL5.05zLg8_YvBYDljt6hH9oMFXPhWEbWMQ8khSp2KxqtuKdDsFy2Fn.AWQHlzqL2Iko_lnf8rocGrU89NNo8uoB9Lb9Yil6qs06LTkJs5DBSN1mrbAHxTRTXZBaqHuoAaqscAQU_gkBhGYaYl9Vq0hzr5KNp5kvPoeCHakwM0lpIYyhDJvWRyljzRLddcWoM.xyUu1zVO4xlA9efQBAZ4qRew9hIEjUMzxfNbcmJJ7N3hRNlG3LFfhKkE6eeRUOhG5i.OB9vCuVP5HAIDnc.bUM010nlHWRshRr3kEyNNfm2_Gy2Bb_w1a1Uh2xf8Rs.SL4P.XF2xCNthrpi70WSWRw0TdHUfGciWJ_wykEhisFkfdOAKduaT3Sle1ulgQ3X8.1WOjvkp.42pWPqhEAQL6D6zqFPvYPw2gWLcvuE1LuLyw0QdcKJtbSMw5_2SEe8HtlMBREfVDfYQ_PijuZLFx2ZLF1aa91lx00cMvol1ZQ.1lR4IPcRGmmiTDHdlG5.CEwQeQfCqGirZmNvRGgocbHewtiK6AOa_p1d0feYSd.5BYfFRlFCjWw.Psn1WWikucfAsfi0ynicWDlgUHukKKVcLzDSSAoCFbNb8ue90hOc8WCbfFSTUkLCH7KD9yiKmIlrFUjSrDsC15GuKtvK28rf5M68AodY_nheYoR2N1mdvExqTw5wyLQzaosdcfzPdcA_R8zr6WOsYsLbLZcmm.viABIJvswA_FoeO5.2q5NZGs2gZm7KiSRNVPctBtAEmpqQK76r.El4BxscH.TgXEvUTi1UNuK9NZ6X83DqSz95us5B3XlqVT2zzz2ob0r3rGIVf5Hzw92qBAycn476LNxSY_YFq8wvsyYiNdIfGJzqHjKxKIvPWglM_fjtWkdcvJ9rAjku2iH__3NdeQYKwWhgXepvKC7qbVBsRjNnmLR7TnfWQi5Vz1db3vLRWAx.ro7LcIAqh9CRq3JJGxr_8qyMpPY.UXL3dHWJPCdim9Yca3gTDPObIFCvhEFyiUgqdsVcfC52tB48SYK07J1ZLikLoFHrnoVUf3x6IhwM3eYJQtVzjfyjk8Oxlcs4UkPSydoHdYzo5nEeL972_Uj18up.hcjzKgTU6fYnUfMQLbu3UOHOnTiO8NN6nUR0Jb4iNrBv7kV0Pd1IE_9TjGOQ_bKTbWaKf4lyGMsJZDtBSmhHMUViHT3sL.MFbQSxjZdoEXrFeYfU4hzai.YopPfA0DN5p.ljMY.0hQwGr2T8DcTqmGs3w8D6UbpK3l6UFNZzXsMOu4XNWtwEDPAVAlg9hmQPDHlnSUI15AiXgLIxt_YrZ3zhkOCpJ0PPUn2bVIfUkrZu7B4vt0BCxrGvC7EX2buH1zTbsRelvR5iuMfv5i2ad80VIKxCy6To.S72J0fLpbSBfo94P3LkrPM7oSl4EhOwcWZpQIK7yzMfzJJVwUODIRZTRHcn03CcKQopf0wxbWMJh0eHw4R57rkE6D9QAmlHbVTSG1jW5pY9FIuePWpNT18siOzMTJ1l.Pszwxt.RX2r_OFSqoqHrvDiDTEcNwfVl_AXauPUXWAUShjSaDq.xgJp.JVvya.9h"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913581330c9812b0';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=Nelum%20Chathuranga%20Amarasena&__cf_chl_rt_tk=qffipvYU.rXA05eM0AcdMhyBEvkvdKlthZck.F8xIow-1739792448-1.0.1.1-KWLOqk8WKTQ9U7m2vhL9EMkjFJpd6muibcvciDlPTro" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>