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: '913515596d02481c',cH: 'oo3Q06NPNSDo4L5Dl5cTjPORl49SkWLkwVZGitM5zy0-1739788030-1.2.1.1-33hgPCZc6EAQhmcPdPq97iRuoY8vN8UKVvy9AwWmRIUVssqf50iiV71NkCRluMbV',cUPMDTk: "\/abstracts\/search?q=Khong%20Yik%20Chew&__cf_chl_tk=A8u9on18jwBb0GMCGpjP_8eNzt2NKzayoAoqc2pw8Zc-1739788030-1.0.1.1-.yAarEoW92ILqZj1eHcBWwMkxH1yBzfhJhgneNa8WkM",cFPWv: 'b',cITimeS: '1739788030',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Khong%20Yik%20Chew&__cf_chl_f_tk=A8u9on18jwBb0GMCGpjP_8eNzt2NKzayoAoqc2pw8Zc-1739788030-1.0.1.1-.yAarEoW92ILqZj1eHcBWwMkxH1yBzfhJhgneNa8WkM",md: "2ut.b98xP7o2RaRsWm84S3qqnps9S.RcN52pVwHxwAc-1739788030-1.2.1.1-scwCo4I6HiDsavjYwofIPxH6P3Whj2XI4lIrn7qBu_Yi8S7kCfDU_bs.vbTU0uMvIqwIBdhxHtbx9V0WbhuhOPtF0Le0xOuNgu7aN.RuuQRqG5QGwb.S4xQH7dqqvVphGT_mnWkSpqw1Z9VdvYFg9mjAsl.K6dPyc6OWQl9ewa0ifY4CffFz3AhTOIwpp2lluC7dQ7kqD1m40K5e3LVoyv5A48qQs9Uocz9TwKlt3jqwb4QsUmGCnN2hC6Y9w9c4fCwtll16ENxUPbTYrxAwWesSXfK7YAcryN5j49Ou0ERZ5jM0asmDkES20tBW3AhqVvXhDwDQiNav.79JhQIda64rkG63tUEU5KEQMYHfOoVlm7THP89T0iik4Itbiu17xJM0gCvHfCbo48RIgTNgL2FTJnctfx42qmDHSKUJd0l7j1n_a.ZCd2C9baLYMmJvMsOW6nNeY9Jg6H5HD67iQcZ50B62OVEYYErbZR8pBzmucWlBbPCoWAxtw6mx63NXgTnxRSYQc_rwvC_JTZ_yOnSmFt7o3pC4JoWUWtgJFzxFIX3ptLlfIIq5j9GoFWBCfEtuptY9ru5Jdi0z._TMrNk5UYX7rFITMWFi_sW7gS1cYGIvfAGVGCFTsRJ4kc.axFdsHRT0BGi8w.xNvL3PweTFIQrLjZBVxHI2uQXGIOm6.g6Aze7pghYJOSAzVujT3EPYvedZNDjVvM2ahoBL16EXdwU1Fb_NWhEZsUpBcAVWFzPncFuRj3r7adTC4b.866ZdB0kvAFWXplxQrSpSqjCIhW_QMaxqlh2OLI_4ciiGOYmg7fKnT2VE1HSIHeZwzarFDE6nADzrr_RNsuW_94IwaMSzeE.4OGpmWUnpl7kfL.aUl.h5QHE.qelJkTAQzsQWO8a8xtBgyI2Xk.fdqzUvbHKFhZ5SX9m5zUpfd9cvzPfIJy2JmsV8sEMuW5.d7taQREULqpTAq.wGcEFhxK3h_xW7ErpllLRNEhI.pNTFP998jmG9FokICX.9ftf8BnTxmRCVGRSJw7AsVGcjYrgZJvpyx7Pj9KAvQkA2mPr389uHKckWVamYGXQLNpa1nV0CMs02xCE7lFr5OpJqQaFfkavHRw3XNdUtx8Ih4qRC4xabWIYGTzIUCiW9yllmIgMGeM0vkqFOBJmSnlximGZgU2bi7sOk05HdjZfDLDwIJcdTXwjU33A.ZYRUa52GqqMq2WaWtVOEwhj3OcaVIjx2DSOleIsLNe8SM9cFEd1qXbIznjj5NKHsiMpt_..ysAs1yYodI4hNpM8qOFvNAZApZqhIo0edsvJq7721ligadgIdOusEaFbnpQ.5l4x2oEEMEYs8Uy30v9goJOkMbTzMuo5KTsoR2zeztDYEJWPJy7pUtqXYRVnhP301I4v5A.oGKOMuaH19zvGl.VTgdw7Krd3OJ8k_PlwU8Q4w_IkXPV1D1QBB2Q4vlQ.VtjyHr5MDv1v.DeKi29r3ZFLj14L_db6oGM9jmsXmdGwmwv9oIZ.g5zhxIydjFoPzApUY_HT3e.WqAaFNnxnkds8wCyWLo6DiJapSfAKywMQOOehSUqTcOpOCaldKgB50IbfwzsgtLvXNlkNaKEG5G9UcIllZIr5y8kEsV.FZWcxyIYSaiPow7mEld8omUVjSw3lYWODxwpCkacOI9FcAc8kXOIyFBUK_IwVNMMFyUJkCPEz3ywCRs2izqr5subLA8b55BWd0xCXVtiX7bRMhxHTVyqV0Wyk5.ogy.YgobC8AX58WR9cRRWc27JWaIdcs7Bo69kRNRcTBP9VpTW5gM13MKqvkWcoIlP2J1Lxk4nGCWbL5MXednPxNWG.FXQYF2Bpztmjiq9J8.nEHeaBqGZ1m089TatJNB9_5qDNFc_ygMmhjm1EwCTGb7DE8Rufa4KvpwrURPfeDPTQKYVsRX9HT34Ilc31HyAnJ2FMOGdVC_WI",mdrd: "hDwNMRbOZxjaamDy5CqYsVu.gNFwJG0IwTX0Ihf3jaw-1739788030-1.2.1.1-uN4dRxBzmnU9Pq1vxVjjp4.ZD_XC9oZ1485A4or5_O5_67khqeVM5Z_2gORW9vPoMnT39gIaQVMyn0s3PvYQy_0iVA0EJQQksBcGwlZg3JZqtiFdRNV52sEA1RC1TQcNWnP5XBEpT3_dGlO.5nrSGTIWjo1wwjoCW7eDUeSM8HIVQUrN9YvNirPUCEKPSAbC3aqkM36vbse5mNxHRZqibud1AdrQoxYrpvG8kppfhh79ouC3UAqfJvtknyUlb0xQkhoL7PXC9K4Z9CnG_kKoTwQCQSao.AE6Mx2QMEz3QyoBCyZl1CBpGHjVMY.gYJ7CKVNgUviwweLWYWd.TlBTMONfIBSAUMcs5mdlvGb2jB0ceHPzayqc6V0qTrEdsdQ1MYJZzTn1dFZVv1dC.jCD0QZoCJdMnPRuHCuXm1PFCv4fCf2Zr7RYpMIC5909fmosjS7JgFuMiumTCByXNkSpgBhgFWCwEnmwq7EavWZvixAV_zdh6xk4QdHv0jKH_ZH1t9k5LN7RL6WFM8traWYtmUWifC_Y5uNK2Z_8NEahJkzj7fQF9uBqvJUO4hvGAu5jQFnw5V8kzBf8leKc5OPg7BAu1rCcKNUJi80cLHGJif2Rf_AwUB.yVEfC15AELpnHqa1Elk2v59nIDrfChWQE78Ctw4dLeRwMUjvowxkUYSgbZjQPhcU.coz0NjLZEe7gueN18j9Sm7_kF6wkF5NCcNi3i4ViLp3MGp1qP2n1mrNv7tJ3o.aisAkGJBsgXwNWcYBUTAtilPlTZlg_vRyxy3vKlwoVxHfdmr2lQ7FiT9oYjSjNcd6Nrd42wpAG4J5pqlXsmvVGtWko.50xPSXLuh8OMAFFx9losnXwMrhOvQKP0156.kVhnDBjVpFpki_n7qSAdC6X_onmLg94xrg3m.O_u3et_PGeRMUKmaA4r3xyZTHPGJng61l4kQE3ZBgNA6Y05HrnknxRWfpXFwyfTy1f0oNkqtalUNbdwAYhcUZsaLXbSmMyTNGn2ossmXym7qQr.punpWZI.jYTQTotGRJdUIdiTbhFLGNNxFFKCCj.aRt7W1FgSQr4bl4GiOOXcm10hrfUN.woWsL1cscj.FT2IwQ041xlf9Dz_xFDl345nTCqBYlohk8ass742E0y4YWdrG5fVBPdu68vkGqNwFlQpJib7.8uYS2YTtPKHS8iK4vSArYlcTTS3om5.NsMqsii7SsgwxOlhzDQFp4WH9xu5IJdzi0mIeYV_2zhL66A6lXWhrKo7UTacVYI1Pyy3BbKYynbT2cWUuYXsW4HoOJm7GhO6jTpIsuqRJxiUSGaeB3Rl7Yrz_X52CTkAmwWOtRFsOuQV_40NXfmSfI5nync2fMn1GdyPNS_rCtpg4f176t2l.MZL_P9J0lYqfB998RY4IfYwnt1Sp2AtM37bBaVBCAQ7Ky9Hc19z1gBC_UEfUYgoCIpHI_wjZLUvcJsHo5Evbay7hfk_hj_WHamaSACfkrb1ZMSftJPgLYOVMSGgx5OyWVUP6W8yE4eQvkVWVSRpeJS53yQVxunxOKrZY4QmzCWFk.Exi1.PJn5MSVea0c52k1Wnb_NhvVTw_7uYZrzp.NZoVmoWEXFZ9DCj5T2ryHc.fVlTVKSgaX6w_pk2jVqujx8L1AZRhIY9gdFBQVsoQFprLaqDwGQ924to_ZeKlOxEGx9RBg5yZ2G3PE1Ih6..mo7DHB6YZMA8ewULs65u5HACdlf3okjD8XDkGzAsRNentgOuwfYUhKgqd7dGsNsaMPzSGqL_KtlphwZVifoA02t2eqP5h.cLnrdlNp9aGY0IyeFvQCqj36gKS4RaU999Wkdljw0IKq._dUUZYRxtZzS5yBoCOFrYM.5tvjQ0Pejgc3VBY9C6uUS0CDWMZIjoChOU67RLxvN1k.nyDS5Oa9ZQHFIDjevhUCBWIRwB9hAqcU9_6dUjVIDhGNvuqWr3nWQ7GE32SxmBRVQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913515596d02481c';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=Khong%20Yik%20Chew&__cf_chl_rt_tk=A8u9on18jwBb0GMCGpjP_8eNzt2NKzayoAoqc2pw8Zc-1739788030-1.0.1.1-.yAarEoW92ILqZj1eHcBWwMkxH1yBzfhJhgneNa8WkM" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>