nuryazmin ahmat zainuri, nur arzilah ismail, izamarlina ashaari, noorhelyna razali, haliza othman, zulkifli mohd nopiah.  (2023).  pengajaran dan pembelajaran secara bersemuka dan atas talian: pencapaian pelajar dalam kursus matematik kejuruteraan.  - persidangan penyelidikan pendidikan kejuruteraan dan alam bina 2023 (peka 2023).  147-149. 

izamarlina asshaari, nuryazmin ahmat zainuri, noorhelyna razali, haliza othman, nur arzilah ismail, zulkifli mohd nopiah.  (2023).  prestasi pelajar bagi kursus kalkulus vektor dan aljabar linear di fkab, ukm.  - persidangan penyelidikan pendidikan kejuruteraan dan alam bina 2023 (peka 2023).  1-15. 

nur arzilah ismail, nuryazmin ahmat zainuri, noorhelyna razali, muhamad alias md jedi, izamarlina asshaari, zulkifli mohd nopiah, haliza othman.  (2023).  integrated smart attendance ukm and google spreadsheet to monitoring students' attendance.  - kongres dan pertandingan inovasi dalam pengajaran dan pembelajaran.  1. 

nur arzilah ismail, nuryazmin ahmat zainuri, noorhelyna razali, haliza othman, izamarlina ashaari, zulkifli mohd nopiah dan muhamad alias md jedi.  (2023).  memaksimumkan impak pembelajaran melalui klinik matematik: pengelompokan pelajar matematik kejuruteraan di fkab, ukm.  - persidangan pendidikan kejuruteraan dan alam bina.  126-129. 

nur arzilah ismail, nuryazmin ahmat zainuri, noorhelyna razali, haliza othman, izamarlina ashaari, zulkifli mohd nopiah dan muhamad alias md jedi.  (2023).  memaksimumkan impak pembelajaran melalui klinik matematik: pengelompokan pelajar matematik kejuruteraan di fkab, ukm.  - persidangan pendidikan kejuruteraan dan alam bina.  126-129. 

rodzidah mohd rodzi, noor ezlin ahmad basri, zulkifli mohd nopiah.  (2023).  language translation from english to malay in solid waste engineering.  - jurnal kejuruteraan.  857-867. 

nur arzilah ismail, nuryazmin ahmat zainuri, noorhelyna razali, zulkifli mohd nopiah, muhamad alias md. jedi, haliza othman, wan zawiah wan zin.  (2023).  exploring students achievements in differential equations courses and their feelings towards mathematics courses.  - jurnal kejuruteraan.  127-134. 

nuryazmin ahmat zainuri, nur arzilah ismail, izamarlina ashaari, noorhelyna razali, haliza othman, zulkifli mohd nopiah.  (2023).  pengajaran dan pembelajaran secara bersemuka dan atas talian: pencapaian pelajar dalam kursus matematik kejuruteraan.  - persidangan penyelidikan pendidikan kejuruteraan dan alam bina 2023 (peka 2023).  1-19. 

zulkifli mohd nopiah dan muhammad aqil ismal hisman.  (2023).  pengurusan masa, gaya pembelajaran dan prestasi akademik di kalangan pelajar di fakulti kejuruteraan alam dan bina.  - prosiding persidangan pendidikan kejuruteraan dan alam bina 2023: pendidikan kejuruteraan dan alam bina terkehadapan -pemacu generasi madani.  140-143. 

nurul eizzaty sohimi, haryanti mohd affandi, adi irfan che ani, zulkifli mohd nopiah, norazlinda mohamad.  (2022).  kurikulum dan instruksi siri 13.  - .  14. 

mohd haniff osman, zulkifli mohd nopiah, shahrum abdullah.  (2022).  petua lesu: fahami isyarat secara algoritma berevolusi.  - .  203. 

faridah zulkipli, zulkifli mohd nopiah, nurul husna jamian, noor ezlin ahmad basri, cheng jack kie.  (2022).  mean score analysis on awareness of solid waste management in malaysia.  - international journal of academic research in business and social sciences.  650-658. 

jian bian bian, r. leelavathi, n. lohgheswary, z. m. nopiah.  (2022).  emotion recognition and analysis of citizens based on micro-blog during covid-19 epidemic.  - jurnal kejuruteraan.  177-189. 

faridah zulkipli, zulkifli mohd nopiah, nurul husna jamian, noor ezlin ahmad basri, cheng jack kie.  (2022).  sustainable public awarenesson solid waste management and environmental care using logistic regression.  - jurnal kejuruteraan.  139-148. 

siti khadijah abdul ghani, zulkifli mohd nopiah, noor ezlin ahmad basri, wan siti adibah wan dahalan, kohei watanabe, hassan basri.  (2022).  measuring stability period of post-closure sanitary landfill in malaysia using double exponential smoothing.  - jurnal kejuruteraan.  149-158. 

wan siti adibah binti wan dahalan;kamal halili bin hassan;zulkifli bin mohd nopiah;rasyikah binti md khalid.  (2022).  developing a specific law on 3r (reduce, reuse, recycle)in malaysia according to sustainability principle.  - .  . 

noorhelyna binti razali;ahmad kamal ariffin bin mohd ihsan;haliza binti othman;zulkifli bin mohd nopiah;nuryazmin binti ahmat zainuri;nurfaradilla binti mohamad nasri;haryanti binti mohd affandi;nazatul aini bte abd majid.  (2022).  integrating augmented reality in problem based learning environment to enhance the performance in engineering mathematics courses.  - .  . 

ahmad kamal ariffin bin mohd ihsan;shahrum bin abdullah;zulkifli bin mohd nopiah;dzuraidah binti abd. wahab.  (2021).  reliability formulation of fatigue life assessment for powder-bed laser-fused materials.  - .  . 

rodzidah mohd rodzi, zulkifli mohd nopiah, noor ezlin ahmad basri.  (2021).  senario umum pengurusan sisa pandemik covid-19 di malaysia: satu tinjauan.  - jurnal kejuruteraan.  817-830. 

ang wei lun;elankovan a/l a sundararajan;zulkifli bin mohd nopiah;noorhelyna binti razali;siti mistima binti maat;muhamad alias bin md. jedi.  (2021).  development of learning analytics-enhanced massive open online courses framework for engineering mathematics subjects.  - .  . 

haryanti binti mohd affandi;haliza binti othman;zulkifli bin mohd nopiah;nuryazmin binti ahmat zainuri;noorhelyna binti razali.  (2021).  pembangunan instrumen bagi kriteria penilaian kompetensi bagi kaedah "recognition prior learning experience (rple)" bagi program certified construction manager (ccm).  - .  . 

faridah zulkifli, zulkifli mohd nopiah, noor ezlin ahmad basri, cheng jack kie.  (2021).  correlation analysis and multilinear model for prediction on solid waste generation in malaysia.  - jurnal kejuruteraan.  439-445. 

fatemah baradari, zulkifli mohd nopiah, sabirin ja'afar, w. s. a. wan dahalan.  (2021).  critical risk factor of joint venture projects in the oil and gas industry.  - jurnal kejuruteraan.  447-460. 

lennie abdullah, zulkifli mohd nopiah, mohd zaki nuawi.  (2021).  lesu pengecaman dan penyelesaian dalam automotif.  - .  213. 

khuzeiney ismail, zulkifli mohd nopiah, mohamad sattar rasul.  (2021).  model kompetensi dan prestasi kerja pengajar tvet pengajar kompeten aspirasi negara.  - .  167. 

ahmad kadri junoh, zulkifli mohd nopiah, ahmad kamal ariffin mohd ihsan.  (2021).  hingar : penilaian pengoptimuman dalam sektor automotif.  - .  181. 

ramizi mohamed, zulkifli mohd nopiah and raja affendi raja ali.  (2021).  closed monitoring of malaysia covid-19 using seir compartmental model for first wave trajectory.  - international journal of advanced technology and engineering exploration.  135-148. 

ramizi mohamed, zulkifli mohd nopiah, raja affendi raja ali.  (2021).  s-e-i-r model solution for malaysia covid-19 pandemic projection.  - turkish journal of physiotherapy and rehabilitation.  2844-2854. 

ramizi mohamed, zulkifli mohd nopiah and raja affendi raja ali.  (2021).  s-e-i-r model solution for malaysia covid-19 pandemic projection.  - 2021 4th international conference on engineering and computing (iceecomp2021).  1-12. 

mohammad rahim kamaluddin & fauziah ibrahim.  (2021).  pelan strategik pdrm 2021-2025.  - .  60. 

nuryazmin ahmat zainuri, haliza othman, mohd haniff osman, noraishikin zulkarnain, zulkifli mohd nopiah.  (2020).  impak pembelajaran berasaskan masalah terhadap pemahaman pelajar kejuruteraan tentang masalah pengangguran graduan di malaysia.  - knovasi: kongres dan pertandingan inovasi p&p.  3. 

ramizi mohamed, zulkifli mohd nopiah and raja affendi raja ali.  (2020).  closed monitoring of malaysia covid-19 using seir compartmental model for first wave trajectory.  - 2020 3rd international conference on recent advances in engineering, computing and applied sciences (raecas2020).  1-20. 

ramizi mohamed, zulkifli mohd nopiah and raja affendi raja ali.  (2020).  closed monitoring of malaysia covid-19 using seir compartmental model for first wave trajectory.  - 2020 3rd international conference on recent advances in engineering, computing and applied sciences (raecas2020).  1-14. 

khuzainey ismail, zulkifli mohd nopiah, mohd sattar rasul.  (2020).  emotional intelligence and work performance among vocational teachers.  - journal of technical education and training.  106-117. 

sallehuddin mohamed haris, aghil shavalipour, zulkifli mohd. nopiah.  (2020).  mekanik komputeran: eksperimen, model dan simulasi.  - .  13. 

khuzainey ismail, zulkifli mohd nopiah, mohamad sattar rasul & pang chau leong.  (2020).  kurikulum & instruksi.  - .  10. 

intan nadia ghulam khan, wan siti adibah wan dahalan, rasyikah binti md khalid, zulkifli mohd nopiah, kamal halili bin hassan.  (2020).  legislations on solid waste minimization: a comparison between malaysia and australia.  - e-prosiding : diskusi syariah dan undang-undang.  12-23. 

ismail khuzainey, mohd nopiah zulkifli, sattar rasul mohamad, pang chau leong.  (2020).  technical competency among vocational teachers in malaysian public skills training institutions: measurement model validation using pls-sem.  - journal of technical education and training.  163-175. 

noraida azura md darom, hawa hishamuddin, rizauddin ramli, zulkifli mohd nopiah, ruhul a sarker.  (2020).  investigation of disruption management practices and environmental impact on malaysian automotive supply chains: a case study approach.  - jurnal kejuruteraan.  341-348. 

n. razali, n.a. zainuri, h. othman, z.m. nopiah and n.a.a. bakar.  (2020).  engineering students performance in mathematics through project-based learning.  - universal journal of educational research.  1899-1906. 

intan nadia ghulam khan, wan siti adibah wan dahalan, zulkifli mohd nopiah.  (2020).  solid waste management laws in malaysia.  - .  110. 

n. lohgheswary, z.m. nopiah, e. zakaria, a.a. aziz and s. salmaliza.  (2019).  review on the usage of software in engineering mathematics.  - journal of engineering and applied sciences.  7485-7489. 

n. lohgheswary, z.m. nopiah, e. zakaria, a.a. aziz and s. salmaliza.  (2019).  identifying common engineering mathematics topics for innovative learning of engineering mathematics.  - journal of engineering and applied sciences.  7765-7770. 

intan nadia ghulam khan, wan siti adibah wan dahalan, zulkifli mohd nopiah.  (2019).  enhancing sustainable solid waste management in malaysia through anti-littering laws.  - the european proceedings of social & behavioural sciences.  41-50. 

intan nadia ghulam khan, wan siti adibah wan dahalan , rasyikah md. khalid, zulkifli mohd nopiah, kamal halili hassan.  (2019).  legislation on solid waste minimization: a comparison between malaysia and australia.  - asean emerging researchers conference 2019 : energising leadership translating purpose into impact.  1-15. 

n. lohgheswary, z.m. nopiah, e. zakaria, a.a. aziz and s. salmaliza.  (2019).  improving the learning of engineering mathematics via. lab session.  - journal of engineering and applied sciences.  6964-6970. 

n. lohgheswary, z.m. nopiah, e. zakaria, a.a. aziz and f.n.d.a. samah.  (2019).  development of the engineering mathematics lab module with mathematica.  - journal of engineering and applied sciences.  1840-1846. 

n. lohgheswary, z. m. nopiah, a. a. aziz, e. zakaria, n. a. ismail.  (2019).  achievement of course outcome and level of bloom taxanomy in pre-final test questions.  - journal of mechanics of continua and mathematical sciences.  115-126. 

siti sarah januri, zulkifli mohd nopiah, ahmad kamal ariffin mohd ihsan, nurulkamal masseran, shahrum abdullah.  (2019).  the analysis of fatigue lifetime using markov chain model based on randomization paris law equation.  - international journal of innovative technology and exploring engineering.  282-286. 

rodzidah mohd rodzi, zulkifli mohd nopiah, noor ezlin ahmad basri.  (2019).  waste management risks and opportunities identification in malaysia tvet institution.  - international journal of recent technology and engineering.  1665-1667. 

rodzidah mohd rodzi, zulkifli mohd nopiah, noor ezlin ahmad basri.  (2019).  analysis of solid waste generation and composition in malaysia tvet campus.  - international journal of integrated engineering.  158-170. 

nurul eizzaty sohimi, haryanti mohd affandi,adi irfan che ani, zulkifli mohd nopiah & norwaliza abdul wahab.  (2019).  management & leadership series 2.  - .  12. 

rodzidah mohd rodzi, zulkifli mohd nopiah, noor ezlin ahmad basri.  (2019).  environmental awareness and attitudes towards solid waste management among tvet students in malaysia.  - international journal of innovative technology and exploring engineering.  387-392. 

mohd. zaki bin nuawi;jaharah bt. a ghani;shahrum bin abdullah;zulkifli bin mohd nopiah;zaliha binti wahid.  (2019).  pembangunan sistem pemantauan haus mata alat menggunakan pelbagai jenis sensor dalam proses lirik.  - .  . 

muhamad alias md. jedi, mohd huzairi johari, zulkifli mohd nopiah, haryanti mohd affandi, noorhelyna razali, haliza othman, nuryazmin ahmat zanuri, mohd hanif osman.  (2019).  rekacipta inovasi nasional kejuruteraan dan alam bina 2019, prin-kab 2019.  - rekacipta inovasi nasional kejuruteraan dan alam bina 2019, prin-kab 2019.  1-100. 

muhamad alias md. jedi,mohd huzairi johari, zulkifli mohd nopiah, haryanti mohd affandi, noorhelyna razali, haliza othman, nuryazmin ahmat zanuri, mohd hanif osman.  (2019).  national innovation invention in engineering and built environment (prin-kab 2019).  - national innovation invention in engineering and built environment (prin-kab 2019).  1-88. 

khuzainey ismail, zulkifli mohd nopiah, mohamad sattar rasul, pang chau leong.  (2019).  development of competency items for vocational teachers using rasch model analysis.  - journal of engineering science and technology.  51-58. 

faridah zulkipli, zulkifli mohd nopiah, noor ezlin ahmad basri, cheng jack kie, khairul irwan khalid.  (2019).  recycle evaluation using system dynamics for solid waste management in malaysia.  - international journal of recent technology and engineering (ijrte).  657-659. 

n. lohgheswary, z.m. nopiah, e. zakaria, a.a. aziz and s. salmaliza.  (2019).  applying computational tools in vector calculus.  - journal of engineering and applied sciences.  8142-8146. 

intan nadia ghulam khan, wan siti adibah wan dahalan, zulkifli mohd nopiah.  (2019).  a survey on perceptions of legal and non-legal factors affecting sustainable solid waste management in malaysia.  - akademika.  41-51. 

mohd. hafizzudin md. zahir, chin ong woon, sudharshan n. raman, mohd. farid mohamed & zulkifli mohd. nopiah.  (2019).  kajian persepsi arkitek terhadap pelaksanaan bumbung hijau di malaysia: faedah, halangan dan cadangan.  - jurnal kejuruteraan.  375-381. 

zulkifli mohd nopiah, siti aminah osman, norhana arsad.  (2019).  pengukuran rasch dalam penilaian hasil pembelajaran pendidikan kejuruteraan.  - .  275. 

n. lohgheswary, z.m. nopiah, e. zakaria, a.a. aziz and s. salmaliza.  (2019).  incorporating computer algebra system in differential equations syllabus.  - journal of engineering and applied sciences.  7475-7480. 

intan nadia ghulam khan, wan siti adibah wan dahalan, zulkifli mohd nopiah.  (2018).  enhancing sustainable solid waste management in malaysia through anti-littering laws.  - international conference on law, environment and society (icles) 2018: nature and the law.  . 

nuryazmin ahmat zainuri, noorhelyna razali, haliza othman, alias jedi, noraishikin zulkarnian, firdaus mohamad hamzah dan zulkifli mohd nopiah.  (2018).  item analisis bagi subjek kalkulus vektor di fakulti kejuruteraan dan alam bina, ukm.  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

n. razali, n.a. zainuri, a. jedi, h. othman, n. zulkarnain, z.m. nopiah, a.w. lun dan f.m. hamzah.  (2018).  pengaruh keputusan pra-syarat terhadap prestasi pelajar bagi subjek analisis kompleks.  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

siti sarah januri, zulkifli mohd nopiah, ahmad kamal ariffin mohd ihsan, nurulkamal masseran, shahrum abdullah.  (2018).  the analysis of initial probability distribution in markov chain model for lifetime estimation.  - international journal of integrated engineering.  . 

noraishikin zulkarnain, alias jedi, haliza othman, noorhelyna razali, nuryazmin ahmat zainuri, ang wei lun, sharainie sahrin, firdaus mohamad hamzah, zulkifli mohd nopiah & mohd syuhaimi ab rahman.  (2018).  hari matematik : penerapan elemen dan aplikasi matematik melalui projek tahun akhir pelajar fkab, ukm.  - k-novasi 2018, pendidikan 4.0: graduan kalis masa depan.  1. 

ang wei lun, alias jedi, noraishikin zulkarnain, noorhelyna razali, haliza othman, nuryazmin ahmat zainuri, firdaus mohd hamzah, sharainie sharin, zulkifli mohd nopiah.  (2018).  k-novasi p&p ukm 2018.  - pemahaman penguasaan pelajar terhadap kalkulus vektor: korelasi antara pencapaian dalam pra-ujian dan ujian sebenar.  . 

haliza othman, alias jedi, noorhelyna razali, nuryazmin ahmat zainuri, noraishikin zulkarnian, ang wei lun, sharainie sahrin, firdaus mohd hamzah, zulkifli mohd nopiah.  (2018).  klinik matematik: sokongan pembelajaran matematik untuk pelajar-pelajar kejuruteraan di fkab, ukm, memberi kesan positif kepada pendidikan stem.  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

ang wei lun, alias jedi, noraishikin zulkarnain, noorhelyna razali, haliza othman, nuryazmin ahmat zainuri, firdaus mohd hamzah, sharainie sharin, dan zulkifli mohd nopiah.  (2018).  pemahaman penguasaan pelajar terhadap kalkulus vektor: korelasi antara pencapaian dalam pra-ujian dan ujian sebenar.  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

nur arzilah binti ismail;haliza binti othman;zulkifli bin mohd nopiah;firdaus bin mohamad hamzah;khamisah binti jafar;norngainy binti mohd tawil;mohd haniff bin osman.  (2018).  pendedahan awal matematik kejuruteraan dalam projek inovasi sains dan teknologi kejuruteraaan menerusi pembelajaran berasaskan masalah (pbm) di peringkat sekolah menengah.  - .  . 

ang wei lun, alias jedi, noraishikin zulkarnain, noorhelyna razali, zulkifli mohd nopiah.  (2018).  penilaian komprehensif keberkesanan pengajaran dan kecenderungan pembelajaran untuk matematik kejuruteraan (aljabar linear).  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

ang wei lun, alias jedi, noraishikin zulkarnain, noorhelyna razali, zulkifli mohd nopiah.  (2018).  penerimaan pelajar terhadap penggunaan video dalam pembelajaran aljabar linear di universiti kebangsaan malaysia (ukm).  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

ang wei lun, alias jedi, noraishikin zulkarnain, noorhelyna razali & zulkifli mohd nopiah.  (2018).  k-novasi p&p ukm 2018.  - penerimaan pelajar terhadap penggunaan video dalam pembelajaran aljabar linear di universiti kebangsaan malaysia (ukm).  . 

n. lohgheswary, m. h. abdul halim, z. m. nopiah, a. a. aziz, e. zakaria.  (2018).  developing new lab base teaching approach for linear algebra subject in engineering mathematics courses.  - journal of mechanical engineering.  . 

haliza othman, alias jedi, noorhelyna razali, nuryazmin ahmat zainuri, noraishikin zulkarnain, ang wei lun, sharainie sahrin, firdaus mohd hamzah & zulkifli mohd nopiah.  (2018).  klinik matematik: sokongan pembelajaran matematik untuk pelajar-pelajar kejuruteraan di fkab, ukm, memberi kesan positif kepada pendidikan stem.  - k-novasi pengajaran dan pembelajaran ukm2018.  1. 

faridah zulkipli, zulkifli mohd nopiah, noor ezlin ahamad basri, cheng jack kie, jafri zulkepli and khairul irwan khalid.  (2018).  integrated dynamical model for malaysian solid waste management using system dynamics.  - international journal of engineering & technology.  . 

noorhelyna razali*, nuryazmin ahmat zainuri, alias jedi, haliza othman, noraishikin zulkarnain, zulkifli mohd nopiah & firdaus mohd hamzah.  (2018).  menguasai matematik melalui pembelajaran berasaskan projek.  - k-novasi 2018: pendidikan 4.0: graduan kalis masa depan.  1. 

mohamad sattar rasul.  (2018).  rampai penyelidik siri 6: stem untuk komuniti.  - rampai penyelidik siri 6: stem untuk komuniti.  . 

n. lohgheswary, z. m. nopiah, a. a. aziz, e. zakaria.  (2018).  filtering the course outcomes for engineering mathematics lab via rasch model.  - international journal of advanced and applied science.  1-5. 

noraishikin zulkarnain, alias jedi, haliza othman, noorhelyna razali, nuryazmin ahmat zainuri, ang wei lun, sharainie sahrin, firdaus mohamad hamzah, zulkifli mohd nopiah dan mohd syuhaimi ab rahman.  (2018).  hari matematik : penerapan elemen dan aplikasi matematik melalui projek tahun akhir pelajar fkab, ukm.  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

m. mahmud, s. abdullah, s. s. k. singh, a. k. ariffin, z. m. nopiah and a. arifin.  (2018).  distribution characterisation of coil spring strain histories using mixed weibull analysis.  - international journal of engineering & technology.  . 

siti sarahjanuri, zulkifli mohd nopiah, ahmad kamal ariffin mohd ihsan, nurulkamal masseran, and shahrum abdullah.  (2018).  initial probability distribution in markov chain model for fatigue crack growth problem.  - international journal of engineering & technology.  . 

n. lohgheswary, z. m. nopiah, a. a. aziz, e. zakaria.  (2018).  identifying vector calculus topics for innovative teaching via computational tools.  - the turkish online journal of design, art and communication - tojdac.  . 

nuryazmin ahmat zainuri,noorhelyna razali, haliza othman,alias jedi, noraishikin zulkarnain, firdaus mohamad hamzah & zulkifli mohd nopiah.  (2018).  k-novasi 2018,pendidikan 4.0:graduan kalis masa depan.  - item analisis bagi subjek kalkulus vektor di fakulti kejuruteraan dan alam bina, ukm.  1. 

m. f. mod yunoh, s. abdullah, m. h. m. saad, z. m. nopiah, m. z. nuawi, s. s. k. singh.  (2018).  probabilistic-based analysis for damaging features of fatigue strain loadings.  - frattura ed integrita strutturale.  . 

roszilah hamid, zulkifli mohd nopiah, noorhelyna razali & 19 others.  (2018).  prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

n. razali, n.a. zainuri, a. jedi, h. othman, n. zulkarnain, z.m. nopiah, a.w. lun dan f.m. hamzah.  (2018).  meningkatkan prestasi pelajar dalam matematik melalui pembelajaran berasaskan projek.  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

noraishikin zulkarnain, alias jedi, haliza othman, noorhelyna razali, nuryazmin ahmat zainuri, ang wei lun, firdaus mohd hamzah, sharainie sahrin & zulkifli mohd nopiah.  (2018).  pengaruh gaya kognitif terhadap pencapaian pelajar kejuruteraan melalui kursus persamaan kebezaan.  - k-novasi 2018, pendidikan 4.0: graduan kalis masa depan.  1. 

faridah zulkipli, zulkifli mohd nopiah, noor ezlin ahmad basri, cheng jack kie.  (2018).  dynamical integrated framework development of solid waste management in malaysia.  - international journal of engineering & technology.  . 

muhamad alias md jedi.  (2018).  pengukuhan kemahiran data analitik melalui sijil profesional aras satu.  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

m. f. m. yunoh, s. abdullah, m. h. m. saad, z. m. nopiah, m. z. nuawi, a. ariffin.  (2018).  classification of fatigue damaging segments using artificial neural network.  - journal of mechanical engineering.  . 

noraida azura darom, hawa hishamuddin, rizauddin ramli, zulkifli mat nopiah.  (2018).  an inventory model of supply chain disruption recovery with safety stock and carbon emission consideration.  - journal of cleaner production.  . 

n. razali, z. m. nopiah and h. othman.  (2018).  comparison of one-step and two-step symmetrization in the variable stepsize setting.  - sains malaysiana.  . 

noraida azura md darom, hawa hishamuddin, rizauddin ramli, zulkifli mat nopiah, ruhul a sarker.  (2018).  an integrated vendor-buyer model subject to supply disruption with transportation cost.  - journal of mechanical engineering.  . 

muhamad alias md jedi, noraishikin zulkarnain, haliza othman, noorhelyna razali, nuryazmin ahmat zainuri, ang wei lun, zulkifli mohd nopiah & mohd syuhaimi ab rahman.  (2018).  pengukuhan kemahiran data analitik melalui sijil profesional aras 1.  - .  1. 

intan nadia ghulam khan, wan siti adibah wan dahalan, z.m.nopiah.  (2018).  solid waste separation at source among households for sustainable solid waste management: the application of the solid waste and public cleansing management act 2007.  - international journal of asian social science.  . 

khuzainey ismail, zulkifli mohd nopiah, & mohamad sattar rasul.  (2018).  challenges faced by vocational teachers in public skills training institutions: a reality in malaysia.  - journal of technical education and training (jtet).  . 

zulkifli m. nopiah, hasan balfaqih and nizaroyani saibani.  (2018).  development of performance measurement framework for supply chain in desalination industry using ahp.  - international journal of engineering & technology.  . 

faridah zulkipli, zulkifli mohd nopiah, noor ezlin ahmad basri, cheng jack kie, muhammad afif zafri khuzairi.  (2018).  prototype pmsp system development for operational level in solid waste management.  - the journal of social sciences research.  . 

m. mahmud, s. s. k. singh, s. abdullah, a. k. ariffin, z. m. nopiah.  (2018).  determining damaging fatigue cycles under influence of random loadings using the root-mean-square level.  - journal of mechanical engineering.  . 

m. mahmud, s. s. k. singh, s. abdullah , a. k. ariffin, z. m. nopiah.  (2018).  determining daming fatigue cycles under influence of random loadings using the root-mean-square level.  - journal of mechanical engineering.  . 

intan nadia ghulam khan, wan siti adibah wan dahalan & z.m. nopiah.  (2017).  a survey on perceptions of legal and non legal factors affecting sustainable solid waste management in malaysia.  - tuanku ja`afar conference.  63-72. 

intan nadia ghulam khan dan wan siti adibah wan dahalan.  (2017).  the separation of solid waste at source among households for sustainable solid waste management under the solid waste and public waste cleansing management act 2007 (act 672) : an overview.  - tuanku ja`afar conference.  337-345. 

hasan balfaqih, malak t. al-nory, zulkifli mohd nopiah , nizaroyani saibani.  (2017).  environmental and economic performance assessment of desalination supply chain.  - desalination.  2-9. 

n. lohgheswary, z. m. nopiah, a. a. aziz, e. zakaria.  (2017).  achievement of course outcome in vector calculus pre-test questions.  - journal of fundamental and applied sciences.  394-403. 

n.lohgheswary, z. m. nopiah, a. a. aziz, e.zakaria.  (2017).  using rasch analysis to identify difficult course outcomes in linear algebra.  - indian journal of science and technology.  1-5. 

mohd zaidi omar, rozli zulkifli, rosdiadee nordin, zulkifli mohd nopiah, mohd farid mohamed, suraya shahril, wan nor roslam wan isahak, azhari shamsudeen, mohd huzairi johari, muhamad fadle mohamad abu sadin & siti hajar mohammad.  (2017).  research bulletin innovate-engineering and built environment (vol 10).  - .  1-144. 

balfaqih, h., nopiah, z.m., al-nory, m.t. and saibani, n.  (2017).  sustainable framework for water desalination supply chain: delphi-ahp technique.  - advanced science letters.  4721-4724. 

m. f. m. yunoh, s. abdullah, m. h. m. saad, z. m. nopiah, m. z. nuawi.  (2017).  probability analysis in determining the behaviour of variable amplitude strain signal based on extraction segments.  - latin american journal of solids and structures.  2141-2152. 

intan nadia ghulam khan, wan siti adibah wan dahalan and zm nopiah.  (2017).  an analysis of international conventions related with solid waste management and the position in malaysia.  - malayan law journal.  1-15. 

faridah zulkipli, zulkifli mohd nopiah, noor ezlin ahmad basri, cheng jack kie, siti sarah januri.  (2017).  multilinear regression analysis on solid waste generation quantity in malaysia towards sustainable development.  - international journal of advanced and applied sciences.  . 

m.f.m. yunoh, s. abdullah, m.h.m. saad, z.m. nopiah, m.z. nuawi & s.s.k. singh.  (2017).  determining probabilistic-based failure of damaging features for fatigue strain loadings.  - 7th international conference on durability and fatigue (fatigue 2017).  . 

siti sarah januri, zulkifli mohd nopiah, mohd akramin mohd romlay, ahmad kamal ariffin mohd ihsan, nurulkamal masseran, shahrum abdullah.  (2017).  statistical distribution for initial crack and number of loading in fatigue crack growth process.  - international journal of advanced and applied sciences.  . 

normah abdullah, muhammad anas mohd razali, mohammed hamood othman ahmed, mohd zaki nuawi, mohd marzuki mustafa, zulkifli mohd nopiah, azah mohamed, abu bakar mohamad.  (2017).  neural network adaptive real-time optimizing control of industrial processes.  - chemical engineering research bulletin.  129-138. 

m. f. m. yunoh, s. abdullah, m. h. m. saad, z. m. nopiah, m. z. nuawi.  (2017).  evaluation of fatigue damage classification based on probabilistic weibull analysis.  - iranian journal of science and technology, transactions of mechanical engineering.  189-195. 

m. f. m. yunoh, s. abdullah, m. h. m. saad, z. m. nopiah, m. z. nuawi.  (2017).  k-means clustering analysis and artificial neural network classification of fatigue strain signals.  - journal of the brazilian society of mechanical sciences and engineering.  757-764. 

noraida azura md darom, hawa hishamuddin ,rizauddin ramli & zulkifli mat nopiah.  (2017).  an inventory recovery model of a two stage supply chain system subject to supply disruption with safety stock consideration.  - recar 2017 international conference on recent advances in automotive engineering and mobility research.  . 

nur arzilah ismail, haliza othman, firdaus mohamad hamzah, izamarlina asshaari, fadiah hirza mohammmad ariff, nuryazmin ahmat zainuri, noorhelyna razali dan zulkifli mohd nopiah.  (2017).  pencapaian pelajar dan hubungan antara kursus-kursusmatematik kejuruteraan di fkab, ukm.  - prosiding k-novasi pengajaran dan pembelajaran ukm (pendidikan kejuruteraan dan alam bina) 2017.  286-292. 

alias jedi, ang wei lun, noraishikin zulkarnain, zulkifli mohd nopiah, fadiah hirza mohammad ariff & haliza othman.  (2017).  pemantapan pemahaman kalkulus vektor melalui klinik matematik.  - prosiding k-novasi pengajaran dan pembelajaran ukm (pendidikan kejuruteraan dan alam bina) 2017.  42-47. 

roszilah hamid, norhana arshad, mohd shahbudin mastar@masdar, et al..  (2017).  meremajakan pengajaran, mengispirasikan pembelajaran.  - prosiding peka 2016 k-novasi p & p ukm (pendidikan kejuruteraan dan alam bina).  1-316. 

mashitah mahmud, salvinder singh karam singh, shahrum abdullah, ahmad kamal ariffin mohd ihsan, zulkifli mohd nopiah.  (2017).  determining damaging fatigue cycles under influence of random loadings using the root-mean-square level.  - 5th international conference on advances in mechanical engineering.  . 

balfaqih h., nopiah z.m., al-nory m.t., saibani n..  (2016).  performance measurement of water desalination supply chain using balanced scorecard model.  - international journal of engineering and technology.  55-63. 

senin a., nopiah z.m., ihsan a.k.a.m., abdullah s., wahab d.a., jamaludin m.j., zakaria a..  (2016).  johnson cook constitutive modeling for austenite metal in hot forming process.  - jurnal teknologi.  71-75. 

z. m. nopiah, n. lohgheswary, a. a. aziz, e. zakaria & a. zaharim.  (2016).  analysis of pre-test linear algebra questions via rasch measurement model.  - the 3rd ism international statistical conference, universiti malaysia.  . 

n.lohgheswary, z.m.nopiah, e.zakaria.  (2016).  evaluating the reliability of pre-test differential equations questions using rasch measurement model.  - journal of engineering science and technology.  31-39. 

wan siti adibah wan dahalan, intan nadia ghulam khan, zulkifli mohd nopiah.  (2016).  regulating landfills in malaysia : an evaluation.  - malayan law journal.  1-2. 

wan siti adibah wan dahalan, intan nadia ghulam khan & z.m. nopiah.  (2016).  a preliminary study on the legal framework of solid waste management in malaysia.  - the social sciences.  5810-5817. 

wan siti adibah wan dahalan , intan nadia ghulam khan dan zulkifli mohd nopiah.  (2016).  household solid waste recycling : a comparison between malaysia and singapore from the legal perspective..  - the social sciences.  5803-5809. 

balfaqih h., nopiah z.m., saibani n..  (2016).  a conceptual framework for supply chain performance in desalination industry.  - international journal of industrial engineering and management.  95-101. 

mohammad k. younes, z.m. nopiah, n.e. ahmad basri, h. basri, mohammed f.m. abushammala, mohammed y. younes.  (2016).  landfill area estimation based on integrated waste disposal options and solid waste forecasting using modified anfis model.  - waste management.  3-11. 

mohd zaidi omar, rozli zulkifli, rosdiadee nordin, zulkifli mohd nopiah, mohd farid mohamed, suraya shahril, wan nor roslam wan isahak, roslena binti md zaini, azhari shamsudeen, mohd huzairi johari, siti hajar mohammad.  (2016).  research bulletin (engineering & built environment).  - .  1-122. 

kamal, n., rahman, n. n. s. a., husain, h.and nopiah, z. m..  (2016).  the correlation between electrical engineering course performance and mathematics and prerequisite course achievement.  - pertanika journal of social sciences & humanities.  97-110. 

roszilah hamid, norhana arshad, badariah bais, firdaus mohd hamzah, nizaroyani saibani, shahrom md zain, et al..  (2016).  memikir semula pengajaran dan mereka bentuk semula pembelajaran.  - prosiding peka2015 k-novasi pengajaran dan pembelajaran (pendidikan kejuruteraan dan alam bina).  1-301. 

normah abdullah, ramin razmi, tan chung chuan, zulkifi mohd nopiah, azah mohamed, mohd zaki nuawi.  (2016).  design and simulation of hierarchical control of two continuous stirred tank heater in series.  - indian journal of science and technology.  1-12. 

hasan balfaqih, zulkifli mohd. nopiah, nizaroyani saibani, malak t. al-nory.  (2016).  review of supply chain performance measurement systems : 1998 - 2015.  - computers in industry.  135-150. 

hasan balfaqih, zulkifli mohd nopiah, nizaroyani saibani.  (2016).  a conceptual framework for supply chain performance in desalination industry.  - international journal of industrial engineering and management.  95-101. 

hasan balfaqih, zulkifli mohd nopiah, al-nory, malak t. al-nory, nizaroyani saibani.  (2016).  performance measurement of water desalination supply chain using balanced scorecard model.  - international journal of engineering and technology.  55-63. 

mohd zaidi omar, rozli zulkifli, rosdiadee nordin, zulkifli mohd nopiah, mohd farid mohamed, suraya shahril, wan nor roslam wan isahak, roslena md zaini, azhari shamsudeen, mohd huzairi johari & siti hajar mohammad.  (2016).  research bulletin innovate-engineering and built environment.  - .  . 

norbahiah misran, roszilah hamid, badariah bais et al..  (2016).  pertanika journal of social sciences and humanities.  - pertanika journal of social sciences and humanities.  1-282. 

normah abdullah, muhammad syahmi afif moktar yazid, zulkifli mohd nopiah, mohd zaki nuawi, mohd marzuki mustafa, azah mohamed, abu bakar mohamad.  (2016).  neural network controller design for continuous stirred tank heat exchanger.  - international conference on science and technology, malaysia-thailand -japan, graduate centre, universiti kebangsaan malaysia.  E-O-04. 

tan ching yee, chong pik kha, tan chung chuan, normah abdullah, zulkifli mohd nopiah.  (2016).  modeling and pid control of two continuous stirred tank heaters in series.  - malaysa-thailand-jepun internationan conference.  . 

n. abdullah, m. a. m. razali, m. h. o. ahmad, m. z. nuawi, m. m. mustafa, z. m. nopiah, a. mohamed, a. b. mohamad.  (2016).  neural network adaptive real-time optimizing control of industrial processes.  - international conference of chemical engineering & industrial biotechnology (icceib 2016).  . 

zulkifli mohd nopiah, siti sarah januri, ahmad kamal ariffin, nurulkamal masseran, shahrum abdullah.  (2016).  transition probabilities matrix of markov chain in the fatigue crack growth model.  - the 4th international conference on quantitative sciences and its applications (icoqsia 2016).  1-6. 

faridah zulkipli1, a) zulkifli mohd nopiah2,b) noor ezlin ahmad basri3, c) and cheng jack kie4,.  (2016).  stock flow diagram analysis on solid waste management in malaysia.  - international conference on quantitative sciences and its applications (icoqsia2016).  1-6. 

intan nadia ghulam khan, wan siti adibah wan dahalan & z.m. nopiah.  (2016).  solid waste management analysis on the relevant international conventions and the position in malaysia.  - proceedings of the persiswa law conference 2016 (persloc 2016): contemporary legal issues across globalisation.  380-389. 

firdaus mohamad hamzah, khamisah jafar, haliza othman, noorhelyna razali, nuryazmin ahmad zainuri dan zulkifli mohd nopiah.  (2016).  kesan pra-ujian terhadap pencapaian pelajar di dalam kursus persamaan pembeza di fakulti kejuruteraan dan alam bina ukm.  - prosiding k-novasi pengajaran dan pembelajaran ukm 2016 (pendidikan kejuruteraan dan alam bina).  1-8. 

wan siti adibah wan dahalan, rohimi shapiee, mahmud zuhdi mohd, zulkifli mohd nopiah & salawati mat basir.  (2016).  improving teaching and learning in public international law ii.  - international journal of education and research.  383-390. 

wan siti adibah wan dahalan, zulkifli mohd nopiah, asma hakimah ab. halim, jady @ zaidi hassim & zinatul ashiqin zainol.  (2016).  assessing the achievements of ukm undergraduate law students in entrepreneurship course.  - international journal of education and research.  229-236. 

haliza othman, nur arzilah ismail, khamisah jafar, fadiah hirza mohammad ariff, nuryazmin ahmat zainuri, noorhelyna razali, firdaus mohd hamzah, izamarlina asshaari, zulkifli mohd nopiah.  (2016).  keberkesanan pembelajaran aktif pelajar dalam aktiviti pembelajaran berasaskan masalah bagi kursus-kursus matematik kejuruteraan: pendekatan model pengukuran rasch.  - prosiding k-novasi pengajaran dan pembelajaran ukm 2016 (pendidikan kejuruteraan dan alam bina).  110-117. 

hasan balfaqih, zulkifli mohd. nopiah, nizaroyani saibani, malak t. al-nory.  (2016).  review of supply chain performance measurement systems: 1998–2015.  - computers in industry.  135-150. 

noorhelyna razali, haliza othman, nuryazmin ahmat zainuri, firdaus mohamad hamzah, izamarlina asshaari, fadiah hirza mohammad ariff, zulkifli mohd nopiah.  (2016).  modern or traditional teaching strategy in learning engineering mathematics course.  - journal of engineering science and technology.  13-20. 

nuryazmin ahmat zainuri, izamarlina asshaari, fadiah hirza mohammad ariff, noorhelyna razali, haliza othman, firdaus mohd hamzah, zulkifli mohd nopiah.  (2016).  item analysis for final exam questions of engineering mathematics course (vector calculus) in ukm.  - journal of engineering science and technology.  53-60. 

zain r.m., ab. rahman m.n., ramli a., nopiah z.m., saibani n..  (2016).  using measures of agreement to evaluate a chronic problem of congestion in the empty container depots.  - international review of management and marketing.  843-850. 

djamaluddin f., abdullah s., ariffin a.k., nopiah z.m..  (2016).  finite element analysis and crashworthiness optimization of foam-filled double circular under oblique loading.  - latin american journal of solids and structures.  2176-2189. 

mohd yusof hj othman, azami zaharim, mashitoh yaacob, faszly rahim, ibnor azli ibrahim & zulkifli mohd nopiah.  (2015).  stem education: integrating acquired & revealed knowledge to improve learning outcome.  - recent advances in computer supported education.  72-75. 

mohd yusof hj othman, azami zaharim, mashitoh yaacob, faszly rahim, ibnor azli ibrahim & zulkifli mohd nopiah.  (2015).  tauhidic science: what & why.  - proceed. of recent advances in computer supported education.  63-71. 

n. misran, s.a.osman, r. hamid, n.t. kofli, n. saibani, n. arsad, m.s. mastar@masdar, z.m. nopiah, b. bais, h. husain, d. nordin, a.a. mutalib, z. harun, w.m.z.w. mahmood, s. johar, k. jafar et al..  (2015).  prosiding k-novasi pengajaran & pembelajaran ukm (pendidikan kejuruteraan & alam bina) peka 2014.  - k-novasi pengajaran & pembelajaran ukm (pendidikan kejuruteraan & alam bina) peka 2014, dectar, ukm, 11-12 februari 2015.  383. 

aghil shavalipour, sallehuddin mohamed haris, zulkifli mohd nopiah.  (2015).  symbolic parametric lqr controller design for an active vehicle suspension system.  - journal of applied sciences.  1127-1132. 

aghil shavalipour, sallehuddin mohd haris, zulkifli mohd nopiah.  (2015).  algebraic h2 optimal control design in an active vehicle suspension application.  - international review on modelling and simulations.  377-385. 

djamaluddin f., abdullah s., ariffin a.k., nopiah z.m..  (2015).  optimization of foam-filled double circular tubes under axial and oblique impact loading conditions.  - thin-walled structures.  1-11. 

salina abdul samad, ma hannan, siti kartom kamarudin, mariyam jameelah ghazali, ahmed hussein kamel ahmed nasser elshafie, zulkifli mohd nopiah, sudharshan naidu, abdul halim ismail & roslena md zaini.  (2015).  research bulletin innovate-engineering and built environment (vol 8).  - .  . 

mohammad k. younes, z.m. nopiah, n.e. ahmad basri, h. basri, mohammed f.m. abushammala & maulud k.n.a..  (2015).  solid waste forecasting using modified anfis modeling.  - journal of the air & waste management association.  1229-1238. 

nopiah z.m., junoh a.k., ariffin a.k..  (2015).  vehicle interior noise and vibration level assessment through the data clustering and hybrid classification model.  - applied acoustics.  9-22. 

djamaluddin f., abdullah s., ariffin a.k., nopiah z.m..  (2015).  non-linear finite element analysis of bitubal circular tubes for progressive and bending collapses.  - international journal of mechanical sciences.  228-236. 

rosmaizura mohd zain, mohd nizam ab. rahman, nizaroyani saibani, zulkifli mohd nopiah, ainon ramli, norzaliha jusoh.  (2015).  exploring the delays at empty container off-dock depots: useful perceptions by stakeholders.  - management 2015, 5(5): 148-159.  148-159. 

sallehuddin mohamed haris, aghil shavalipour, zulkifli mohd nopiah and yuzita yaacob.  (2015).  multiple model adaptive control design: a computer algebra approach.  - proc. of the third intl. conf. on advances in mechanical and automation engineering - mae 2015.  73-78. 

kamal halili hassan, rohaida nordin, zinatul ashiqin zainol, zulkifli mohd nopiah, wan siti adibah wan dahalan.  (2015).  penggunaan analisis kos faedah (cba) dalam menilai impak peraturan perundangan.  - simposium kebudayaan dan kerjasama indonesia- malaysia skim xiv 2015.  869-880. 

shahrum bin abdullah, nordin bin jamaludin, mohd. zaki bin nuawi, zulkifli bin mohd nopiah, azli bin arifin.  (2015).  investigation study to predict fatigue failur using acoustic emission characteristics for metallic components.  - .  . 

m.f.m. yunoh, s. abdullah, m.h.m. saad, z.m. nopiah, m.z. nuawi.  (2015).  fatigue feature extraction analysis based on a k-means clustering approach.  - journal of mechanical engineering and sciences.  1275-1282. 

f. djamaluddin, s. abdullah, a.k. arrifin and z.m. nopiah.  (2015).  modeling and optimization of aluminum foam cylindrical double tubes under axial impact.  - journal of mechanical engineering and sciences.  1383-1392. 

mohammad khairi younes, noor ezlin ahmad basri, zulkifli mohammad nopiah, hassan basri, mohammed f.m. abushammala, khairul nizam abdul maulud.  (2015).  integrating approach to size and site at a sanitary landfill in selangor state, malaysia.  - environmental engineering research.  268-276. 

h. othman, n. a. ismail, i. asshaari, f. m. hamzah, z. m. nopiah.  (2015).  application of rasch measurement model for reliability measurement instrument in vector calculus course.  - journal of engineering science & technology.  84-90. 

zulkifli mohd nopiah, ahmad kadri junoh and ahmad kamal ariffin.  (2015).  a novel hybrid fuzzy nonlinear weighted goal programming for optimising interior acoustics level in car cabin.  - journal of vibration and control.  1721-1744. 

n. kamal, n. arsad, h. husain, z.m. nopiah.  (2015).  the relationships between pre-university education and mathematics achievement with performance in engineering subject.  - journal of engineering science and technology (jestec).  10-17. 

mohammad k. younes, z. m. nopiah, n. e. ahmad basri, h. basri , mohammed f. m. abushammala & k. n. a. maulud.  (2015).  prediction of municipal solid waste generation using nonlinear autoregressive network.  - environmental monitoring and assessment.  1-10. 

mohammad k. younes, z. m. nopiah, n. e. ahmad basri, and h. basri..  (2015).  priorities determination using novel analytic hierarchy process and median ranked sample set, case study of landfill siting criteria.  - the 2nd ism international statistical conference 2014 (ism-ii).  377-383. 

mohammad k. younes, n. e. ahmad basri, z. m. nopiah, h. basri, & mohammed f. m. abushammala.  (2015).  use of a combination of mrss-anp for making an innovative landfill siting decision model.  - mathematical problems in engineering.  1-13. 

nooraini sulaiman, azami zaharim, khairul anwar mastor, hassan basri, zulkifli mohd nopiah.  (2015).  relationships between factors influencing engineers` adherence to ethical practices in engineering profession.  - proceedings of the international conference on innovative engineering and technologies (caasr-iciet `15).  36-42. 

n. lohgheswary, z. m. nopiah & e. zakaria.  (2015).  recent usage of software tools in the teaching and learning of engineering mathematics.  - proceedings of the international conference on innovative engineering and technologies (caasr-iciet `15).  . 

z. m. nopiah, n. f. a. fuaad, n. m. tawil, f. m. hamzah & h. othman..  (2015).  student achievement at pre-university level: does it influence the achievement at the university?.  - journal of engineering science and technology.  68-76. 

mohd nizam ab rahman, rosmaizura mohd zain, afis mohd alias, zulkifli mohd nopiah.  (2015).  statistical process control: best practices in small and medium enterprises.  - maejo international journal of science and technology.  193-208. 

chalang hama rashed mohammed, sallehuddin mohamed haris, zulkifli mohd nopiah.  (2015).  multiple model p+i with anti-windup control of a nonlinear hydro turbine.  - icic express letters.  1841-1846. 

m. m. padzi, s. abdullah, m. z. nuawi, s. m. beden, z.m. nopiah.  (2014).  evaluating ultrasound signals of carbon steel fatigue testing using signal analysis approaches.  - journal of central south university.  21(1):232-241. 

m. b. ali, s. abdullah, m. z. nuawi, a. k. ariffin, z. m. nopiah.  (2014).  evaluating instrumented charpy impact strain signals using curve fitting equations.  - journal of central south university.  21(2):600-609. 

yunoh m.f.m., abdullah s., nopiah z.m., nuawi m.z..  (2014).  fatigue time history analysis for determining the strain signal behaviour.  - international journal of vehicle systems modelling and testing.  363-371. 

rozli zulkifli, shahrum abdullah, sallehuddin mohamed haris, zulkifli mohd nopiah, zambri harun, mohd radzi abu mansor dan nor kamaliana khamis.  (2014).  automotive engineering and mobility research.  - .  714. 

s.a. osman, h. husain, a.i. che ani, z.m. nopiah, b. bais, r. hamid, n.m. tawil, n. saibani, m.s. mastar@masdar, n. arsad, d. nordin, n.t. kofli, a.a. mutalib, s.m. zain, a.a.a bakar, z. harun et al..  (2014).  inovasi pendidikan ke arah pemantapan sahsiah & profesionalisme.  - seminar pendidikan kejuruteraan dan alam bina 2013 (peka 2013), sama-sama hotel, klia.  . 

salina abdul samad, ma hannan, siti kartom kamarudin, mariyam jameelah ghazali, ahmed hussein kamel ahmed nasser elshafie, zulkifli mohd nopiah, sudharshan naidu a/l raman, abdul halim ismail dan roslena binti md zaini.  (2014).  research bulletin innovate-engineering and built environment (vol 7).  - .  1-88. 

mohammad k. younes, z. m. nopiah, noor ezlin a. basri & hassan basri..  (2014).  medium term municipal solid waste generation prediction by autoregressive integrated moving average.  - prosiding statistics and operational research international conference (soric 2013), sarawak, malaysia.  . 

ahmad kadri junoh, zulkifli mohd nopiah and ahmad kamal ariffin.  (2014).  application of feed-forward neural networks for classifying acoustics levels in vehicle cabin.  - applied mechanics and materials.  . 

mohd haniff osman, zulkifli mohd nopiah, shahrum abdullah, izamarlina asshaari.  (2014).  genetic algorithm-based fatigue data editing technique.  - 2nd international conference on recent advances in automotive engineering and mobility research, recar 2013; kuala lumpur; malaysia.  431-436. 

m.f.m. yunoh, s. abdullah, m.h.m. saad, z.m. nopiah and m.z. nuawi.  (2014).  fatigue data extraction analysis using daubechies wavelet transform.  - australian journal of basic & applied sciences.  38-40. 

nopiah z.m., junoh a.k., ariffin a.k..  (2014).  computational method for predicting the effects of vibrations to acoustical comfort in vehicle cabin.  - international journal of vehicle noise and vibration.  150 - 170. 

nopiah, z. m., osman, m. h., abdullah, s., baharin, m. n..  (2014).  application of a multi-objective approach and sequential covering algorithm to the fatigue segment classification problem.  - arabian journal for science and engineering.  39(3): 2165-2177. 

m.h. md. zahir, s.n. raman, m.f. mohamed, m. jamil, z.m. nopiah.  (2014).  the perception of malaysian architects towards the implementation of green roofs: a review of practices, methodologies and future research.  - e3s web of conferences : emerging technology for sustainable development congress (etsdc 2014) / edp sciences.  01022-p.1-01022-p.8. 

k. a zakaria, s. abdullah, m. j. ghazali, m. z. nuawi, s.m. beden & z. m. nopiah.  (2014).  fatigue strain signal behaviour and damage assessment of an engine mount bracket.  - journal of scientific & industrial research.  73(2014):112-116. 

zulkifli mohd nopiah, ahmad kadri junoh, ahmad kamal ariffin.  (2013).  optimisation of acoustical comfort in vehicle cabin using goal programming.  - international journal of vehicle noise and vibration.  9(3):194-215. 

m.f.m. yunoh, s. abdullah, z.m. nopiah & m.z. nuawi.  (2013).  a review of localised time-frequency features classification associated to fatigue data analysis.  - international review of mechanical engineering.  960-976. 

f. salehuddin, k.e.kaharudin, h.a.elgomati, i.ahmad, p.r.apte, z.m.nopiah,a.zaharim.  (2013).  comparison of 2k-factorial and taguchi method for optimization approach in 32nm nmos device.  - mathematical methods and optimization techniques in engineering : proceedings of the 1st international conference on optimization techniques in engineering (oteng `13).  . 

azrilah abdul aziz, azami zaharim, norain farhana ahmad fuaad, zulkifli mohd nopiah.  (2013).  students` performance on engineering mathematics: applying rasch measurement model.  - 2013 12th international conference on information technology based higher education and training (ithet).  . 

salina abdul samad, ma hannan, siti kartom, mariyam jameelah ghazali, ahmed hussein kamel, zulkifli mhd nopiah, sudharshan naidu, abdul halim ismail & roslena md zaini.  (2013).  research bulletin innovate volume 6, 2013.  - research bulletin.  . 

s. abdullah, c.k.e. nizwan, m. f. m. yunoh, m. z. nuawi and z. m. nopiah.  (2013).  fatigue features extraction of road load time data using the s-transform.  - international journal of automotive technology.  14(5):805-815. 

noorfazila kamal, norhana arsad, hafizah husain, zulkifli mohd nopiah.  (2013).  analisa pencapaian pelajar jkees melalui subjek matematik.  - kongres pengajaran & pembelajaran ukm 2013.  . 

m. h. osman, z. m. nopiah, s. abdullah, a. lennie.  (2013).  self-tuning varri method in preparing fatigue segment.  - jurnal teknologi (sciences and engineering).  63(2):45-50. 

n.m. tawil , a. zaharim , i. shaari , n.a. ismail , z.m. nopiah and h. othman.  (2013).  e-learnig as an alternative mode for learning vector calculus for ukm engineering students.  - international journal of soft computing.  8(1):1-7. 

ahmad mohd yusof, maznah banu mohamed habiboo raman, zulkifli mohd nopiah.  (2013).  modeling of the malaysian crude oil system.  - jurnal ekonomi malaysia.  47(1):125-130. 

mohammad, m., abdullah, s., jamaludin, n., innayatullah, o., nopiah, z.m..  (2013).  fatigue failure assessment of metallic specimens using the acoustic emission technique.  - materials testing.  55(4):310-318. 

mohammad k.younes, z.m.nopiah, b. nadi, n.e.ahmad basri, hassan basri, mohammed f.m. abushammala and khaldoun shatanawi.  (2013).  investigation of solid waste characterization, composition and generation using management of environmental systems in zarqa, jordan.  - asian journal of chemistry.  25(17):9523-9526. 

c. hamarasheed, s.m. haris dan z.m. nopiah.  (2013).  weighted multiple model adaptive pid control withcrossover frequency shift tuning for a hydraulic turbine plant.  - applied mechanics and materials, switzerland.  . 

zulkifli mohd nopiah, ahmad kadri junoh, ahmad kamal ariffin.  (2013).  formulation of weighted goal programming using the data analysis approach for optimising vehicle acoustics levels.  - international journal of acoustics and vibration.  18(3):124-133. 

roszilah hamid, zulkifli mohd nopiah, nur arzilah ismail dan eliyana othman @ ariffin.  (2013).  amalan pengajaran dan pembelajaran berkesan dalam pendidikan kejuruteraan dan alam bina.  - .  3: 55-74. 

m. h. md. zahir, s. n. raman, m. f. mohamed, z. m. nopiah, m. jamil.  (2013).  a discussion on methodologies to measure the perception of malaysian architects towards the implementation of green roof system.  - international building control conference 2013.  . 

azman senin,zulkifli mohd nopiah, muhammad jamhuri jamaludin, mohd azmir abidin, muhamad azuan zaudin, muhammad afzal ahmad,ahmad zakaria.  (2013).  shell and solid modeling for structural body-in-white part.  - the 9th international conference and workshop on numerical simulation of 3d sheet metal forming processes.  . 

m.z. nuawi, a.r. bahari, s. abdullah, a.k. ariffin, z.m. nopiah.  (2013).  time domain analysis method of the impulse vibro-acoustic signal for fatigue strength characterisation of metallic material.  - procedia engineering - international conference proceedings fatigue design 2013.  . 

zulkifli mohd nopiah, ahmad kadri junoh and ahmad kamal ariffin.  (2013).  noise annoyance fuzzy index in passenger car cabin.  - international journal vehicle noise and vibration.  216-233. 

chalang hama rashed mohammed, sallehuddin mohamed haris, zulkifli mohd nopiah.  (2013).  multiple model adaptive control of a hydro turbine plant - performance of h-infinity, lqg and pi controllers.  - international journal of advanced mechatronic systems.  5(1):47-58. 

zulkifli mohd nopiah, ahmad kadri junoh, wan zuki azman wan muhamad, mohd jailani mohd nor, ahmad kamal ariffin mohd. ihsan, mohammad hosseini fouladi.  (2012).  linear programming: optimization of noise and vibration model in passenger car cabin.  - international journal of soft computing and software engineering (jscse).  2(1):1-13. 

junoh, a. k., nopiah, z. m., muhamad, w. z. w., nor, m. j. m., fouladi, m. h..  (2012).  an optimization model of noise and vibration in passenger car cabin.  - advanced material research journal.  . 

izamarlina asshaari,haliza othman,hafizah bahaludin,nur arzilah ismail,zulkifli mohd nopiah.  (2012).  appraisal on bloom`s separation in final examination question of engineering mathematics courses using rasch measurement model.  - procedia social and behavioral sciences 60 - ukm teaching and learning congress 2011.  . 

z. m. nopiaha, a. lennieb, s. abdullah, m. z. nuawi, a. z. nuryazmin, m. n. baharin.  (2012).  a statistical analysis on fatigue signal using i-kaztm method.  - seminar on applications of cutting-edge statistical methods in research, upm.  . 

z. m. nopiah, a. lennie, s. abdullah, m. z. nuawi, a. z. nuryazmin dan m. n. baharin.  (2012).  the use of autocorrelation funtion in the seasonality analysis for fatigue strain data.  - journal of asian scientific research.  782-788. 

z. m. nopiah, a. lennie, s. abdullah, m. z. nuawi, a. z. nuryazmin, m. n. baharin.  (2012).  effect of fatigue strain data behaviour using cycle counting method.  - international review of mechanical engineering.  6(3):644-648. 

m.h. osman, z.m. nopiah, s. abdullah, m.n. bahrin, a. lennie.  (2012).  self-tuning varri method in preparing fatigue segment.  - proceedings of the 1st ism international statistical conference 2012.  . 

s.h. mohammad, j.m. jahim, z. nopiah, a.m.a. murad,
f.d.a. bakar and r. illias.  (2012).  preliminary study on diverse carbon utilization by transformant aspergillus niger.  - international journal on advanced science engineering and information technology.  2(4):11-15. 

norngainy mohd tawil, nur arzilah ismail, izamarlina asshaari, haliza osman, zulkifli mohd nopiah, azami zaharim.  (2012).  comparing lecture and e-learning as learning process in mathematics and statistics courses for engineering students in universiti kebangsaan malaysia.  - procedia social and behavioral sciences - ukm teaching and learning congress 2011.  . 

zulkifli mohd nopiah, ahmad mohd yusof, maznah banu mohamed habiboo raman, kamaruzzaman sopian.  (2012).  modelling electricity generation in malaysia using imem: initial results.  - persidangan kebangsaan ekonomi malaysia kevii (perkem)-2012.  . 

nuraini khatimin, azrilah abdul aziz, azami zaharim, zulkifli mohd nopiah.  (2012).  objective standard setting on engineering mathematics in malaysian institution of higher learning.  - 4th international congress on engineering education (iceed 2012).  . 

siti rozaimah sheikh abdullah et al..  (2012).  seminar pendidikan kejuruteraan & alam bina (peka 2012).  - .  . 

norngainy mohd tawil, azami zaharim, izamarlina asshaari, zulkifli mohd nopiah, nur arzilah ismail, haliza osman.  (2012).  a study on engineering undergraduate learning styles towards mathematics engineering.  - procedia social and behavioral science - ukm teaching and learning congress 2011.  . 

ahmad kadri junoh, zulkifli mohd nopiah, wan zuki azman wan muhammad, mohammad hosseini fouladi, mohd jailani mohd nor & ahmad kamal ariffin.  (2012).  linear programming model for optimizing of noise and vibration in passenger car cabin.  - 2011 international conference on system engineering and modeling, shanghai.  . 

z.m. nopiah, w. haslinda, h. abdullah & m.n. baharin.  (2012).  identification of relevant factors on yield completeness using regression analysis.  - proceedings of the 1st ism international statistical conference 2012.  . 

m.h osman, z.m. nopiah, s.abdullah and izamarlina asshari.  (2012).  discover fatigue segment classification rules using a new comprehensive multi-objective genetic algorithm learning framework.  - international cenference on engineering and built environment (icebe) 2012.  . 

m.h. osman, z.m. nopiah and s. abdullah.  (2012).  feature selection for fatigue segment classification system using elitist non-dominated sorting in genetic algorithm.  - regional conference on automotive research, recar 2011;kuala lumpur (applied mechanics and materials).  . 

ahmad kadri junoh, zulkifli mohd nopiah, abdull halim abdul, mohd. jaliani mohd nor, ahmad kamal ariffin mohd ihsan, mohammad hosseini fouladi.  (2012).  a study to predict the effects of tyres vibration to sound quality in passenger car cabin.  - international journal of engineering.  6(1):53-69. 

zulkifli mohd nopiah, suaidah rosli, mohd nor baharin, haliza othman, arzilah ismail.  (2012).  evaluation of pre-assessment method on improving students performance in complex analysis course.  - asian social science.  134-139. 

nopiah, z.m., osman, m.h., abdullah, s., kamarudin, m.n.b.c., asshari, i..  (2012).  satisfying statistical constraints in preparing edited variable amplitude loading history using genetic algorithm.  - modern applied science.  6(9):68-75. 

mohd amin at-tasneem, sallehuddin mohamed haris, zulkifli mohd nopiah.  (2012).  a computing capability test for a switched system control design using the haris-rogers method.  - journal of zhejiang university - science c.  13(10):781-792. 

n.k. khamis, m.z. nuawi, s. abdullah, z.m. nopiah, l. abdullah.  (2012).  signal analysis software as an educational tool for engine diagnostic system.  - international review of mechanical engineering.  6(3):666-670. 

haliza othman, izamarlina asshaari, norgainy mohd tawil, nur azilah ismail, zulkifli mohd nopiah, azami zaharim.  (2012).  analysis on mathematics fundamental knowledge for mathematics engineering courses based on a comparative study of students` entry performance.  - procedia social and behavioral sciences - ukm teaching and learning congress 2011.  . 

haliza othman, izamarlina asshaari, hafizah bahaludin, zulkifli mohd nopiah, nur azilah ismail.  (2012).  application of raschmeasurement model in reliability and quality evaluation of examination paper for engineering mathematics courses.  - procedia social and behavioral seciences - ukm teaching and learning congress 2011.  . 

norngainy mohd. tawil, nur arzilah ismail, izamarlina asshaari, haliza osman, zulkifli mohd nopiah, azami zaharim.  (2012).  learning process in mathematics and statistics courses towards engineering students: e-learning or traditional method?.  - asian social science.  8(16):128-133. 

izamarlina asshaari, norngainy mohd tawil, haliza othman, nur arzilah ismail, zulkifli mohd nopiah, azami zaharim.  (2012).  the importance of mathematical pre-university in first year engineering students.  - procedia social and behavioral sciences 60 - ukm teaching and learning congress 2011.  . 

chalang hamarasheed, sallehuddin mohamed haris and zulkifli mohd nopiah.  (2012).  weighted multiple model adaptive lqg and pi control for a hydro turbine plant.  - proceedings of the 2012 international conference on advanced mechatronic systems, tokyo, japan.  . 

junoh, a. k. 1, a, nopiah, z. m. 2, b, muhamad, w. z. w. 1,c, nor, m. j. m. 2,d, fouladi, m. h. 3,e.  (2012).  an optimization model of noise and vibration in passenger car cabin.  - 2011 international conference on manufacturing science and technology, icmst 2011;singapore.  . 

m.n. baharin, a, z.m.nopiah, s.abdullah, and m.s.m.noor.  (2012).  a study on validation of fatigue damage clustering analysis technique based on clustering validation index.  - regional conference on automotive research, recar 2011;kuala lumpur (applied mechanics and materials).  . 

zulkifli mohd nopiah, zinatul ashiqin zainol, choong weng hing, wan siti adibah wan dahalan.  (2012).  a step to become an entrepreneur: designing a portable and environmentally friendly car cabin cooling device using solar energy.  - 2012 tuanku jaafar law conference and workshop:academic entrepreneurship and university start ups.  . 

zulkifli mohd nopiah, zinatul ashiqin zainol, choong weng hing, wan siti adibah wan dahalan.  (2012).  a first step to become an entrepreneur: designing a portable and environmentally friendly car cabin cooling device using solar energy.  - 2012 tuanku ja`afar law conference and workshop : academic entrepreneurship and university start-ups.  . 

ahmah mohd yusof, zulkifli mohd nopiah, maznah banu mohamed habiboo raman, kamaruzzaman sopian.  (2012).  modelling electricity generation in malaysia using imen: initial results.  - prosiding persidangan kebangsaan ekonomi malaysia (perkem vii) 2012.  . 

zulkifli mohd nopiah, maznah banu mohamed habiboo raman, ahmad mohd yusof dan kamaruzzamman sopian.  (2012).  a linear programming approach for integrated malaysian energy model (imem): crude oil and natural gas subsystems.  - international journal of mathematical sciences and applications.  2(1):349-355. 

zulkifli mohd nopiah, mohd helmi jamalluddin, zinatul a. zainol, abang annuar ehsan, tengku noor kirana tengku anuar and shahrom abdullah.  (2012).  study on behaviour of cases : an analysis on intellectual property ownership.  - 2012 tuanku jaafar law conference and workshop:academic entrepreneurship and university start ups.  . 

zulkifli mohd nopiah, zinatul a. zainol, choong weng hing and wan siti adibah wan dahalan.  (2012).  a first step to become an entrepreneur : designing a marketable solar powered portable car cabin cooling device.  - 2012 tuanku jaafar law conference and workshop:academic entrepreneurship and university start ups.  . 

yunoh, mfm; abdullah, s; nopiah, zm; nuawi, mz; ismail, n.  (2012).  fatigue feature classification for automotive strain data.  - 1st international conference on mechanical engineering research 2011 (icmer); kuantan (iop conference series-materials science and engineering).  . 

nopiah z.m., jamalluddin m.h., haliza othman n.a.i., asshaari i., osman m.h..  (2012).  reliability analisis of examination questions in a mathematics course using rasch measurement model.  - sains malaysiana.  41(9):1171-1176. 

mohd nopiah z., ismail n.a., khatimin n., abdullah s., mustafa m.m..  (2011).  muet score and loadings hour : an analysis on the relationship towards academic performance.  - kongres pengajaran dan pembelajaran ukm, 2010; tanjung keling, melaka.  . 

zulkifli mohd nopiah1, nur arzilah ismail, haliza othman, izamarlina asshaari, noorhelyna razali, mohd haniff, osman and mohd helmi jamalluddin.  (2011).  identification of student achievement and academic profile in the linear algebra course: an analysis using the rasch model.  - 2011 3rd international congress on engineering education (iceed),.  . 

z. m. nopiah, a. lennie, s. abdullah, m. z. nuawi, a. z. nuryazmin
and m. n. baharin.  (2011).  a study on lower suspension arm fatigue data behaviour by using cycle count methods.  - regional conference on automotive research (recar) 2011.  . 

z. m. nopiah1*, m. n. baharin2, h. razali, n. a. zainuri, s. abdullah.  (2011).  identification of student`s achievement using hierarhical clustering method.  - the 5th psu-uns international conference on engineering and technology (icet-2011).  . 

m marsdek, a mohamed, z m norpiah.  (2011).  risk of static security assessment of a power system using non-sequential monte carlo simulation.  - journal of applied sciences.  11(2):300-307. 

haliza othman, izamarlina asshaari, hafizah bahaludin,
nur arzilah ismail & zulkifli mohd nopiah.  (2011).  evaluating the reliability and quality of final exam questions using rasch measurement model: a case study of engineering mathematics courses.  - prosidang seminar peka2011, kongres pengajaran & pembelajaran ukm 2011.  . 

izamarlina asshaari, haliza othman, hafizah bahaludin,
nur arzilah ismail & zulkifli mohd nopiah.  (2011).  rasch measurement in evaluating of blooms separation: a case study in engineering mathematics iii course.  - prosidang seminar peka2011, kongres pengajaran & pembelajaran ukm 2011.  . 

norngainy mohd tawil, nur arzilah ismail, izamarlina shaari, haliza osman, zulkifli mohd nopiah & azami zaharim.  (2011).  e-learning versus traditional method in teaching mathematics and statistics courses for engineering students in universiti kebangsaan malaysia.  - prosidang seminar peka2011, kongres pengajaran dan pembelajaran ukm 2011.  . 

zulkifli mohd nopiah, mohd noor baharin, noorhelyna razali
& norngainy mohd tawil.  (2011).  an outcome-based approach analysis of a course in mathematical engineering.  - prosiding kongres pengajaran & pembelajaran ukm 2011.  . 

n. m. tawil, a. zaharim, n. razali, n. a. ismail, z.m.nopiah.  (2011).  importance - satisfaction analysis for wiley plus in vector calculus.  - 8th wseas international conference on engineering education, education`11, 2nd international conference on education and educational technologies 2011, world-edu`11; corfu island.  . 

f. iberahim, d.a. wahab, z.m. nopiah & s. abdullah.  (2011).  establishment of remanufacturing index for locally manufactured automotive components.  - key engineering materials.  . 

noorhelyna razali, norngainy mohd tawil, azami zaharim, hafizah bahaludin, izamarlina asshaari, zulkifli mohd nopiah..  (2011).  the implementation of wiley-plus® in vector calculus..  - kongres pengajaran dan pembelajaran ukm 2010 (procedia social and behavioral sciences).  . 

s. abdullah, m. b. ali, m. z. nuawi, z. m. nopiah and a. k. ariffin.  (2011).  evaluating charpy impact signals with different frequencies using power spectrum densities.  - 2010 international conference on advances in materials and manufacturing processes, icammp 2010; shenzhen(advanced materials research).  . 

n. k. othman, m. n. zulkifli, a. jalar, and s. abdullah.  (2011).  nanoindentation test for the stiffness distribution analysis of bonded au ball bonds.  - 2010 international conference on advances in materials and manufacturing processes, icammp 2010; shenzhen (advanced materials research).  . 

z. m. nopiah, s. abdullah, m. n. baharin, t. e. putra, s. n. sahadan and k. o. willis.  (2011).  comparative study on data editing techniques for fatigue time series signals.  - 2010 international conference on advances in materials and manufacturing processes, icammp 2010; shenzhen(advanced materials research).  . 

at-tasneem binti mohd amin, sallehuddin mohamed haris, zulkifli mohd nopiah.  (2011).  symbolic computation based control design tool for switched systems.  - proceedings of the 10th wseas international conference on system science and simulation in engineering (icossse `11), penang, malaysia.  . 

s. abdullah, t. e. putra, m. z. nuawi and z. m. nopiah.  (2011).  the use of morlet wavelet coefficients for identifying fatigue damage features.  - pertanika journal of science & technology.  19(5):107-114. 

junoh, a. k., nopiah z. m., muhamad, w.z.a.w., nor m. j. m., fouladi, m. h..  (2011).  a study on the effects of tyre vibration to the noise in passenger car cabin.  - amo - advanced modeling and optimization.  13(3):567-581. 

ahmad mohd yusof, zulkifli mohd nopiah , maznah banu habiboo raman.  (2011).  pemodelan sistem tenaga fosil malaysia: satu pendekatan pemprograman linear.  - jurnal ekonomi malaysia.  45(2011):3-9. 

maznah banu mohamed habiboo raman, zulkifli mohd nopiah, ahmad mohd yusof, kamaruzzaman sopian.  (2011).  a linear programming approach for integrated malaysian energy model (imem): crude oil and natural gas subsystems.  - 1st international conference on mathematical sciences and applications.  . 

zulkifli mohd nopiah, maznah banu mohamed habiboo raman, ahmad mohd yusof , kamaruzzaman sopian.  (2011).  the extraction profile of crude oil and natural gas resources in malaysia using imem.  - international conference on applied sciences, mathematics and humanities, 2011 uitm, negeri sembilan.  . 

zulkifli mohd nopiah, maznah banu mohamed habiboo raman, ahmad mohd yusof and kamarruzaman sopian.  (2011).  forecasting the extraction of crude oil and natural gas resources in malaysia using imem.  - international conference on applied sciences, mathematics and humanities (icasmh`11) seremban, negeri sembilan.  . 

ahmad mohd yusof , maznah banu bt mohamed habiboo raman.  (2011).  model tenaga malaysia bersepadu (imem): struktur dan persamaan.  - persidangan kebangsaan ekonomi malaysia kevi (perkem) - 2011, melaka, malaysia.  . 

marayati marsadek, azah mohamed, zulkifli mohd nopiah.  (2011).  risk based voltage collapse assessment using generalized regression neural network.  - international conference of electrical engineering and informatics (iceei 2011).  . 

norngainy mohd tawil, azami zaharim, izamarlina asshaari, nur arzilah ismail, zulkifli mohd nopiah.  (2011).  importance-satisfaction analysis for wiley plus in vector calculus: students` perspectives.  - wseas transactions on advances in engineering education.  8(1):23-30. 

marayati marsadek, azah mohamed and zulkifli mohd. nopiah.  (2011).  assessment of the risk of voltage collapse in a power system using intelligent techniques.  - australian journal of basic and applied sciences.  5(6):1167-1179. 

shahrum, a., teuku, e.p., mohd, z.n., zulkifli, m.n..  (2011).  vibrational fatigue analysis of a strain loading using the frequency and wavelet filtering methods.  - 8th international conference on fracture and strength of solids 2010, feofs2010; kuala lumpur (key engineering materials).  . 

lennie, a., nopiah, z.m., abdullah, s., baharin, m.n., nuawi, m.z., arifin, a..  (2011).  variable amplitude loading strains data distribution using probability density function and power spectral density.  - 8th international conference on fracture and strength of solids 2010, feofs2010; kuala lumpur (key engineering materials).  . 

nopiah, z.m., osman, m.h., abdullah, s., baharin, m.n..  (2011).  the identification of low fatigue damage using fuzzy double clustering framework.  - 2011 ieee 7th international colloquium on signal processing and its applications, cspa 2011; penang.  . 

baharin, m.n., nopiah, z.m., abdullah, s., khairir, m.i., lennie, a..  (2011).  the development of validation technique in variable amplitude loadings strain repetitive data collection.  - 8th international conference on fracture and strength of solids 2010, feofs2010; kuala lumpur (key engineering materials).  . 

junoh a.k., nopiah z.m., muhamad w.z.a.w., ghazali n., shakir n.a.a., nor m.j.m., hosseini fouladi m..  (2011).  linear programming model for optimizing of noise and vibration in passenger car cabin.  - 2011 3rd international conference on computer research and development, iccrd 2011; shanghai.  . 

abdullah s., sahadan s.n., nuawi m.z., nopiah z.m..  (2011).  fatigue data analysis using continuous wavelet transform and discrete wavelet transform.  - 8th international conference on fracture and strength of solids 2010, feofs2010; kuala lumpur (key engineering materials).  . 

ismail n., abdullah s., nuawi m.z., nopiah z.m., lennie a..  (2011).  durability analysis of an automobile coil spring using hybrid i-kaz.  - source: fracture and strength of solids vii, pts 1 and 2 book series: key engineering materials.  . 

ahmad kadri j., wan zuki azman w.m., zulkifli m.n., nor m.j.m., kamal ariffin a., hosseini fouladi m..  (2011).  a study on the effects of tyre to vehicle acoustical comfort in passenger car cabin.  - 2011 3rd international conference on computer research and development, iccrd 2011; shanghai; 11 march 2011 through 15 march 2011.  . 

putra t.e., abdullah s., nuawi m.z., nopiah z.m., abdullah l., arifin a..  (2011).  extracted fatigue damaging events using the morlet wavelet-based algorithm.  - transactions hong kong institution of engineers.  18(1):22-29. 

abdullah, s; beden, sm; ariffin, ak; nopiah, zm.  (2011).  effects of load sequence on fatigue crack growth in pressure vessels.  - 2011 international conference on materials science and engineering applications, icmsea 2011; xi`an(advanced materials research).  . 

marsadek, m., mohamed, a., nopiah, z.m..  (2011).  risk-based voltage collapse assessment using generalized regression neural network.  - 2011 international conference on electrical engineering and informatics, iceei 2011; bandung.  . 

a.k.junoh, z.m.nopiah , w.z.a.wan muhamad, m.h.fouladi , m.j.mohd nor and a.k.ariffin.  (2010).  optimization model of noise and vibration in passenger car cabin depending on engine speeds on pavement road.  - world engineering congress 2010.  . 

nopiah z.m., baharin m.n., abdullah s., khairir m.i..  (2010).  the detection of abrupt changes for variable amplitude fatigue loading by using running damage extraction method.  - journal of applied sciences.  10(7):544-550. 

a.k.junoh 1,z.m.nopiah 2, m.h.fouladi 3, w.z.a.wan muhamad 1, m.j. mohd nor 2 and a.k.ariffin 2.  (2010).  a study on the effects of tyre vibration to sound quality.  - conference on aerospace and mechanical engineering.  . 

shahrum abdullah, mohd zaidi omar, zulkifli mohd nopiah, nornahiah misran, siti aminah osman, norghainy mohd. tawil, siti rozaimah sheikh abdullah, dzuraidah abd. wahab, adi irfan che ani, hamfad.  (2010).  prosiding seminar pendidikan kejuruteraan dan alam bina 2009 (peka10) sempena kongres pengajaran dan pembelajaran ukm 2010.  - kongres pengajaran dan pembelajaran ukm 2010.  . 

mohd nizam ab rahman, rosmaizura mohd zain, nizaroyani saibani, suriani abdul rahman & zulkifli mohd nopiah.  (2010).  halangan pelaksanaan spc: satu pandangan praktikal daripada syarikat pengusaha kecil dan sederhana.  - journal of quality measurement and analysis.  6(2):1-17. 

zulkifli mohd nopiah, nur arzilah ismail, nuraini khatimin, shahrum abdullah and mohd marzuki mustafa.  (2010).  muet score and loading hours: an analysis on the relationship towards academic performance of the first year ukm engineering students.  - prosiding seminar pendidikan kejuruteraan dan alam bina 2010 (peka2010) sempena kongres pengajaran dan pembelajaran ukm 2010.  . 

maznah banu mohammed habiboo raman , ahmad mohd yusof, zulkifli md nopiah.  (2010).  a linear programming approach to model malaysia`s energy system.  - apors 2010 operations research pathways to sustainable development.  . 

ahmad mohd yusof, maznah banu habiboo raman zulkifli md nopiah.  (2010).  modeling of the malaysia`s crude oil system : some preliminary results.  - proceedings of the malaysia-indonesia international conference on economics, management and accounting, (miicema) 2010:regional development in an era of global innovation economy. fakulti fep, ukm.  . 

nur arzilah ismail, fadiah hirza mohammad ariff, izamarlina asshaari, haliza othman and zulkifli mohd nopiah.  (2010).  pretesting on the first semester engineering students in ukm: does it make a difference?.  - prosiding seminar pendidikan kejuruteraan dan alam bina 2010 (peka2010) sempena kongres pengajaran dan pembelajaran ukm 2010.  . 

marayati marsadek, azah mohamed, zulkifli mohd nopiah.  (2010).  assessment and classification of line overload risk in power systems considering different types of severity functions.  - wseas transactions on power systems.  5(3):182-191. 

marayati marsdek, azah mohamed, zulkifli mohd norpiah.  (2010).  risk assessment of line overload in a practical power system considering different types of severity functions.  - 9th wseas international conference on applications of electrical engineering, penang, 23-25 march 2010..  . 

r. daghigh, a. ibrahim, g. l. jin, m. h. ruslan, sohif mat, zulkifli mohd nopiah, azami zaharim, k. sopian.  (2010).  simulation of amorphous and crystalline silicon based photovoltaic thermal system.  - proceedings of the american conference on applied mathematics (american-math `10), harvard university, cambridge, usa, january 27-29, 2010.  . 

m.h. yazdi, s. abdullah, i. hashim, zulkifli mohd nopiah, azami zaharim & k. sopian.  (2010).  convective heat transfer of slip liquid flow past horizontal surface within the porous media at constant heat flux boundary conditions.  - proceedings of the american conference om applied mathematics (american-math `10), harvard university, cambridge, usa, january 27-29, 2010.  . 

t. e. putra, s. abdullah, m. z. nuawi and z. m. nopiah.  (2010).  wavelet coefficient extraction algorithm for extracting fatigue features in variable amplitude fatigue loading.  - journal of applied sciences.  10(4):277-283. 

mohd nizam ab rahman, rosmaizura mohd zain, suriani abdul rahman & zulkifli mohd nopiah.  (2010).  peningkatan prestasi proses melalui peralatan kualiti berstatistik.  - journal of quality measurement and analysis.  6(1):1-15. 

zulkifli mohd nopiah, mohd haniff osman, noorhelyna razali, fadiah hirza mohammad ariff, izamarlina asshaari.  (2010).  how good was the test set up? from rasch analysis perspective.  - the 3rd regional conference on engineering education and research in higher education.  . 

izamarlina asshaari , haliza othman, nuryazmin ahmad zainuri, fadiah hirza mohammad ariff, noorhelyna razali, nur arzilah ismail, zulkifli mohd nopiah.  (2010).  a comparison on students` entry performance from year 2006 at faculty engineering, built & environment university kebangsaan malaysia.  - the 3rd regional conference on engineering education and research in higher education.  . 

haliza othman , fadiah hirza muhammad ariff , nur arzilah ismail , izamarlina asshaari ,
nuryazmin ahmad zainuri , noorhelyna razali ,
zulkifli mohd nopiah.  (2010).  engineering students` performance in mathematical courses: the case study of faculty of engineering & built environment, universiti kebangsaan malaysia.  - the 1st regional conference on applied and engineering mathematics proceedings (rcaem), eastern & oriental hotel, pulau pinang.  . 

mohd nizam ab rahman, rosmaizura mohd zain, suriani abdul rahman, zulkifli mohd nopiah.  (2010).  peningkatan prestasi proses melalui peralatan kualiti berstatistik.  - journal of quality measurement and analysis.  6(1):1-15. 

s. abdullah, t. e. putra, m. z. nuawi, z. m. nopiah, a. arifin and l. abdullah.  (2010).  extracting fatigue damage features using stft and cwt.  - wseas transactions on signal processing.  6(3):91-100. 

s. abdullah, n. ismail, m. z. nuawi, m. z. nopiah & a. ariffin.  (2010).  using the hybrid kurtosis-based method to correlate strain and vibration signals.  - wseas transactions on signal processing.  6(3):79-90. 

s. abdullah, t. e. putra, m. z. nuawi, z. m. nopiah, a. arifin and l. abdullah.  (2010).  the morlet wavelet analysis for fatigue feature clustering.  - wseas transactions on mathematics.  9(5):345-354. 

z. m. nopiah, m. i. khairir, s. abdullah, m. n. baharin, and a. arifin.  (2010).  time complexity estimation and optimisation of the genetic algorithm clustering method.  - wseas transactions on mathematics.  9(5):334-344. 

z. m. nopiah, m. n. baharin, s. abdullah, m. i. khairir and a. ariffin.  (2010).  running damage extraction technique for identifying fatigue damaging events.  - wseas transactions on mathematics.  9(5):324-333. 

a. lennie, s. abdullah, z.m. nopiah and m.n. baharin.  (2010).  behavioural investigation of fatigue time series using the statistical approach.  - journal of applied sciences.  10 (16):1714-1722. 

abdullah s, ismail n, nuawi mz, nopiah mz, arifin a.  (2010).  study on correlation between strain and vibration signal using hybrid i-kaz method.  - 5th iasme/wseas international conference on continuum mechanics/7th wseas international conference on fluid mechanics/7th wseas international conference on heat and mass transfer univ cambridge.  . 

abdullah, s; putra, te; nuawi, mz; nopiah, zm; arifin, a; lennie, a.  (2010).  using monet wavelet coefficients to cluster variable amplitude fatigue features.  - 5th iasme/wseas international conference on continuum mechanics/7th wseas international conference on fluid mechanics/7th wseas international conference on heat and mass transfer univ cambridge.  . 

nopiah, zm; khairir, mi; abdullah, s; baharin, mn; arifin, a.  (2010).  time complexity analysis of the genetic algorithm clustering method.  - ispra `09: proceedings of the 9th wseas international conference on signal processing, robotics and automation.  . 

nopiah, zm; baharin, mn; abdullah, s; khairir, mi; ariffin, a.  (2010).  an extraction of fatigue damaging events by using running damage extraction (rde) technique.  - ispra '09: proceedings of the 9th wseas international conference on signal processing, robotics and automation.  . 

abdullah, s; putra, te; nuawi, mz; nopiah, zm; arifin, a; abdullah, l.  (2010).  time-frequency localisation analysis for extracting fatigue damaging events.  - ispra '09: proceedings of the 9th wseas international conference on signal processing, robotics and automation.  . 

zulkifli mohd nopiah dan wan rosmanira ismail.  (2009).  application of network models.  - .  120. 

ahmad kadri junoh, zulkifli mohd. nopiah, mohammad hosseini fouladi, mohd. jailani mohd. nor, a.k. ariffin.  (2009).  study to predict noise annoyance level in passenger car cabin interior.  - international conference on applications and design in mechanical engineering (icadme).  . 

marayati marsadek, azah mohamed, zulkifli mohd. norpiah.  (2009).  risk based static security assessment of power systems considering the effects of severity functions.  - the 3rd international power engineering and optimization conference peoco2009, shah alam, selangor, malaysia. 3-4 june 2009.  . 

zulkifli mohd nopiah, muhammad ihsan khairir, shahrum abdullah, che ku eddy nizwan, mohd noor baharin.  (2009).  peak-valley segmentation algorithm for kurtosis analysis and classification of fatigue time series data.  - european journal of scientific research.  29(1):113-125. 

azami zaharim, shahrum abdullah, mohammad darahim ibrahim, zulkifli mohd nopiah.  (2009).  genetic algorithm in time series fatigue analysis.  - european journal of scientific research.  28(1):68-75. 

h. abdullah, j. jurait, a. lennie, z.m. nopiah, i. ahmad.  (2009).  simulation of fabrication process vdmosfet transistor using silvaco software.  - european journal of scientific research.  29(4):461-470. 

mohammad reza faraji zonooz, z.m. nopiah, ahmad mohd.yusof, kamaruzzaman sopian.  (2009).  a review of markal energy modeling.  - european journal of scientific research.  26(3):352-361. 

zonooz m.r.f., nopiah z.m., mohd.yusof a., sopian k..  (2009).  a review of markal energy modeling.  - european journal of scientific research.  . 

mohd nizam ab rahman, rosmaizura mohd zain, zulkifli mohd nopiah, jaharah a ghani, baba md deros, nurhamidi mohamad, ahmad rasdan ismail.  (2009).  the implementation of spc in malaysian manufacturing companies.  - european journal of scientific research.  26(3):453-464. 

ab rahman m.n., zain r.m., ghani j.a., nopiah z.m., ismail a.r., rahman s.a..  (2009).  barriers to implementing an online spc system in malaysian automotive manufacturing companies.  - european journal of scientific research.  30(2):315-325. 

zainuri n.a., nopiah z.m., asshaari i., yaacob n.r..  (2009).  the level of mathematical knowledge of first year engineering students at the faculty of engineering and build environment, universiti kebangsaan malaysia.  - european journal of scientific research.  32(2):201-207. 

zain, rm; ab rahman, mn; nopiah, zm.  (2009).  design an online smes-spc computer based system.  - 2009 international conference on information management and engineering, icime 2009.  . 

zulkifli mohd nopiah, nuryazmin ahmat zainuri, shahrum abdullah, izamarlina asshaari, haliza othman.  (2009).  problem based learning in statistics engineering course: a way to improve generic skills among engineering students.  - prosiding seminar pendidikan kejuruteraan dan alam bina 2009.  . 

mohd zaidi omar, shahrum abdullah, dzuraidah abd.wahab, siti rozaimah sheikh abdullah, zulkifli mohd nopiah, adi irfan che ani, norngainy mohd. tawil, nuryazmin ahmat zainuri.  (2009).  seminar pendidikan kejuruteraan & alam bina (peka09).  - prosiding seminar pendidikan kejuruteraan dan alam bina (peka 2009).  . 

mohd nizam ab rahman, rosmaizura mohd zain, zulkifli mohd nopiah, ahmad rasdan ismail, jaharah a. ghani. baba md. deros, norhamidi muhamad & suriani abdul rahman.  (2009).  improving process performance through smes-spc.  - 19th international conference on flexible automation and intelligent manufacturing (faim 2009).  . 

nopiah z.m., zainuri n.a., asshaari i., othman h., abdullah s..  (2009).  improving generic skills among engineering students through problem based learning in statistics engineering course.  - european journal of scientific research.  33(2):270-278. 

ab rahman, mn; zain, rm; nopiah, zm; ismail, ar; deros, bm; rahman, sa; ghani, ja; muhamad, n.  (2009).  development of online smes-spc computer based system.  - proceedings of the 11th wseas international conference on automatic control, modeling and simulation - controlling, modeling and simulation.  . 

dr. zulkifli mohd nopiah, dr. wan rosmanira ismail, nur jumaadzan zaleha mamat.  (2009).  topik 1, 4 dan 7.  - (module) sbmp4303 decision modelling and analysis.  . 

nuryazmin ahmat zainuri, zulkifli mohd nopiah, noorhelyna razali, izamarlina asshaari, haliza othman.  (2009).  the study on the weaknesses of mathematical foundation in the first year engineering students.  - prosiding seminar pendidikan kejuruteraan dan alam bina 2009.  . 

zulkifli mohd. nopiah, wan rosmanira ismail.  (2009).  applications of network models.  - .  1-5 71-99. 

haliza othman, zulkifli mohd nopiah, izamarlina asshaari, noorhelyna razali, mohd haniff osman, norhana ramli.  (2009).  a comparative study of engineering students on their pre-university results with their first year performance at fkab, ukm.  - seminar pendidikan kejuruteraan dan alam bina (peka`09).  . 

n.m tawil, r.a. ghapar, z.m. nopiah, n.a. ismail, m.h. osman.  (2009).  kajian keperluan e-pembelajaran dalam meningkatkan persamaan kebezaan biasa (ode) untuk pelajar kejuruteraan di ukm.  - seminar on engineering mathematics 2009 (emas`09).  . 

n.m.tawil, r.a.ghapar,m.n.zulkifli,n.a,ismail,m.h.osman.  (2009).  the needs of e-learning to enhance ordinary differential equation (ode) for engineering students in ukm.  - seminar pendidikan kejuruteraan dan alam bina (peka`09).  . 

fadiah hirza mohammad ariff, norhelyna razali, haliza othman, zulkifli mohd nopiah.  (2009).  are the learning outcomes of the mathematics courses at pre-university level relevant to the mathematics courses at faculty of engineering & built environment, ukm.  - prosidang seminar pendidikan kejuruteraan & alam bina (peka09): kongres pengajaran & pembelajaran ukm 2009.  . 

shahrum abdullah, mohammad darhim ibrahim, azami zaharim dan zulkifli mohd nopiah.  (2009).  analisis data rawak terikan-lesu menggunakan kaedah statistik purata-tergerak.  - jurnal kejuruteraan.  21: 21-32. 

nopiah, z.m., baharin, m.n., abdullah, s., khairir, m.i..  (2009).  time series behaviour of lower arm suspension fatigue data using classical decomposition method.  - 2009 international conference on signal processing systems, icsps 2009.  . 

abdullah s., ismail n., nuawi m.z., nopiah z.m., baharin m.n..  (2009).  on the need of kurtosis-based technique to evaluate the fatigue life of a coil spring.  - 2009 international conference on signal processing systems, icsps 2009.  . 

nopiah z.m., khairir m.i., abdullah s., baharin m.n..  (2009).  a weighted genetic algorithm based method for clustering of heteroscaled datasets.  - 2009 international conference on signal processing systems, icsps 2009.  . 

zulkifli mohd nopiah, wan rosmanira ismail, nur jumaadzan zaleha mamat.  (2009).  sbmp4303 decision modelling and analysis (topic 1).  - .  1-15. 

wan rozita wan din, ahmad mahir razali, norazman mohamad nor & zulkifli mohd nopiah.  (2009).  statistical analysis of rifle shooting accuracy.  - seminar on engineering mathematics 2009 (emas`09).  . 

z. m. nopiah, m. i. khairir, s. abdullah, c. k. e. nizwan.  (2008).  peak-valley segmentation algorithm for fatigue time series data.  - wseas transactions on mathematics.  7(12):698-707. 

shahrir abdullah, wendy hardyono kurniawan, kamaruzzaman sopian and zulkifli mohd nopiah.  (2008).  development of the four-cylinder moving mesh model for a 1.6-litre four-stroke direct-injection engine.  - jurnal kejuruteraan.  20:135-149. 

abdullah, s; beden, sm; ariffin, ak; nopiah, zm; zaharim, a; rahman, mm.  (2008).  fatigue life assessment of a shell structure from different steel types: a case study using variable amplitude loadings.  - smo 08: proceedings of the 8th wseas international conference on simulation, modeling and optimization.  . 

zulkifli mohd nopiah.  (2008).  clustering flatigue damage features using genetics algorithm technique.  - seminar pemantauan projek penyelidikan (gup) 2007.  . 

s abdullah, m loman, n jamaluddin, a arifin, zm nopiah, m. z. nuawi.  (2008).  assessment of fatigue damage features in a piping system using signal processing approach.  - proceedings of the 7th wseas international conference on signal processing, turkey.  . 

mohd nizam ab rahman, rosmaizura mohd zain, zulkifli mohd nopiah, jaharah a. ghani, baba md deros, nurhamidi mohamad and ahmad rasdan ismail.  (2008).  statistical process control in smes. a case study.  - proceedings of the 4th wseas/iasme international conference on dynamical systems and control (control`08).  . 

nuryazmin ahmat zainuri, zulkifli mohd nopiah, izamarlina asshaari, nik rusdi yaacob.  (2008).  an analysis on the level of mathematical knowledge on first year engineering students for faculty of engineering and build environment, ukm.  - seminar pendidikan kejuruteraan dan alam bina 2008 (peka 2008).  . 

mohammad reza faraji zonooz, maznah banu mohamed habiboo raman, ahmad mohd yusof, z.m nopiah, kamaruzzaman sopian.  (2008).  a review of markal energy modelling.  - seminar on progress of solar energy research & development 2008.  . 

mohammad reza faraji zonooz, maznah banu mohamed habiboo raman, ahmad mohd yusof, z.m nopiah, kamaruzzaman sopian.  (2008).  a review of markal energy modelling.  - seminar on progress of solar energy research & development 2008.  . 

maznah banu mohamed habiboo rahman ahmad mohd yusof zulkifli mohd nopiah.  (2008).  malaysian crude oil extraction model ; network flow analysis.  - 2nd international conference on sain and technology.  . 

m marsadek, a mohamed, m nizam, z m nopiah.  (2008).  risk based static security assessment in a practical interconnected power system.  - 2nd ieee international conference on power and energy pecon 2008, dec 1-3 2008, johor baru.  . 

kamaruzzaman sopian, juhari ab. razak, zulkifli mohd nopiah, yusoff ali.  (2008).  optimal operational strategies for pico hydro wind photovoltaic diesel hybrid energy system using genetic algorithms.  - isesco science and technology vision.  4(5):55-59. 

kamaruzzaman sopian, azami zaharim, yusoff ali, zulkifli mohd nopiah, juhari ab. razak, nor salim muhammad.  (2008).  optimal operational strategy for hybrid renewable energy system using genetic algorithms.  - wseas transactions on mathematics.  7(4):130-140. 

s. abdullah, s. n. sahadan, m. z. nuawi and z. m. nopiah.  (2008).  fatigue road signal denoising process using the 4th order of daubechies wavelet transforms.  - journal of applied sciences.  8(14):2496-2509. 

s. abdullah, m. d. ibrahim, a. zaharim and z. mohd nopiah.  (2008).  statistical analysis of a nonstationary fatigue data using the arima approach..  - wseas transactions on mathematics.  7(2):59-66. 

azami, mohd zaidi, norhamidi, dzuraidah, s.rozaimah, nor aishah, norbahiah, shahrum, amiruddin, ruhaizan, zulkifli, zamri, adi irfan, nuryazmin & haliza.  (2008).  prosiding seminar pendidikan kejuruteraan dan alam bina.  - prosiding seminar pendidikan kejuruteraan dan alam bina (peka 2008).  . 

abdullah, s; sahadan, sn; nuawi, mz; zaharim, a; nopiah, zm.  (2008).  on the need of the 4(th) order of daubechies wavelet transforms to denoise a nonstationary fatigue loading.  - proceedings of the 7th wseas international conference on signal processing, robotics and automation - advanced topics on signal processing, robotics and automation.  . 

abdullah, s; nuawi, mz; nizwan, cke; zaharim, a; nopiah, zm.  (2008).  fatigue life assessment using signal processing techniques.  - proceedings of the 7th wseas international conference on signal processing, robotics and automation - advanced topics on signal processing, robotics and automation.  . 

nopiah, zm; khairir, mi; abdullah, s.  (2008).  segmentation and scattering of fatigue time series data by kurtosis and root mean square.  - new aspects of signal processing and wavelets.  . 

s. abdullah, m.d. ibrahim, z. mohd nopiah and a. zaharim.  (2008).  analysis of a variable amplitude fatigue loading based on the quality statistical approach.  - journal of applied sciences.  8(8):1590-1593. 

wendy hardyono kurniawan, shahrir abdullah, kamaruzzaman sopian, zulkifli mohd. nopiah and azhari shamsudeen.  (2008).  cfd investigation of fluid flow and turbulence field characteristics in a four-stroke automotive direct injection engine.  - journal - the institution of engineers, malaysia.  69(1):1-12. 

rosmaizura mohd zain, mohd nizam ab rahman, zulkifli mohd nopiah, jaharah a ghani, baba md deros, nurhamidi mohamad and ahmad rasdan ismail.  (2008).  kajian kes perlaksanaan proses kawalan statistik (spc) di industri pembuatan malaysia: permasalahan dalam perisian spc.  - seminar 1 amreg 2008.  . 

yusoff bin ali, othman jaafar, khairul anuar ishak, nurina anuar, zulkifli mohd nopiah dan azami zaharim.  (2008).  penilaian kerja pelajar untuk mencapai objektif kursus pengenalan kepada kejuruteraan kf1134.  - peka 2008, bukit merah resort 2008.  . 

zulkifli mohd nopiah, nuryazmin ahmat zainuri, izamarlina asshaari, haliza othman.  (2008).  the first introduction of pbl in statistics engineering course in universiti kebangsaan malaysia.  - prosiding seminar pendidikan kejuruteraan dan alam bina 2008.  . 

z. m. nopiah, m.n. baharin, s. abdullah, m. i. khairir and c. k. e. nizwan.  (2008).  abrupt changes detection in fatigue data using the cumulative sum method.  - wseas transactions on mathematics.  7(12):708-717. 

w. h. kurniawan, s. abdullah, z. m. nopiah and k. sopian.  (2007).  multiobjective optimisation of combustion process in a cngdi engine using genetic algorithm and gaussian processes.  - proceedings of computational & experimental mechanics (cem) 2007, bangi, malaysia.  . 

a. ismail, a. zaharim, s. abdullah, z. mohd nopiah & f. l. mohd. isa.  (2007).  a longitudinal study of first year engineering students' performance at the universiti kebangsaan malaysia: before and after the implementation of the obe approach.  - proceedings of the 4th iasme/wseas international conference on engineering education.  . 

a. ismail, a. zaharim, s. abdullah, z. mohd nopiah and f.l. mohd isa.  (2007).  a longitudinal study of first year engineering students` performance at the universiti kebangsaan malaysia: before and after the implementation of the obe approach.  - 4th. wseas/iasme international conference on engineering education (ee`07). issn: 1790-5117, isbn: 978-960-8457-93-5..  . 

shahrum abdullah, m. d. ibrahim and zulkifli mohd nopiah.  (2007).  a study of variable amplitude fatigue loading using the quality control statistical approach.  - regional conference proceedings on engineering mathematics, mechanics, manufacturing & architechure (emarc) 2007.  . 

wendy h. kurniawan, shahrir abdullah, zulkilfli m. nopiah and kamaruzzaman sopian.  (2007).  multi-objective optimization of combustion process in a compressed natural gas direct injection engine using coupled code of cfd and genetic algorithm.  - jsae technical paper, japan society of automotive engineers.  1 2007-01-1902. 

zulkifli, m. n., khamisah, j., azami, z., halim, i., izamarlina, a., haliza, o.  (2007).  a study on attitude towards mathematics of first year engineering students at the university kebangsaan malaysia.  - 2nd regional conference on engineering education: towards building world class human capital, johor bahru, 3-5 december 2007.  . 

wendy h. kurniawan, shahrir abdullah, zulkifli m. nopiah and kamaruzzaman sopian.  (2007).  the development of artificial neural network for prediction of performance and emissions in a compressed natural gas engine with direct injection system.  - sae technical paper.  01-4101. 

wendy h. kurniawan, shahrir abdullah, zulkifli m. nopiah and kamaruzzaman sopian.  (2007).  the application of artificial neural network in predicting and optimizing power and emissions in a compressed natural gas direct injection engine.  - sae technical paper.  2007-01-4264. 

amiruddin ismail, aini hussain, azami zaharim, abdul khalim abdul rashid, nurina anuar, zulkifli mohd. nopiah dan mohd jailani mohd nor.  (2005).  menjana kecemerlangan di kalangan pelajar kejuruteraan ukm.  - pascasidang seminar pengajaran & pembelajaran berkesan 2005: 32-40.  . 

azami zaharim, mohd jailani mohd nor, and zulkifli mohd nopiah.  (2005).  linearity testing and arima modeling for vibration signal.  - proceedings of seminar on advances in malaysian noise vibration and comfort (nvc 2005), 17-18 may 2005.  .