a n al-shamani,k sopian,a m. abed,m a alghoul,m h ruslan,s mat.  (2015).  study of heat transfer due to turbulent flow of nanofluids through rib groove channel.  - iop conf. series: materials science and engineering.  1-6. 

hoy-yen chan, jie zhu, mohd hafidz ruslan, kamaruzzaman sopian, saffa riffat.  (2014).  thermal analysis of flat and transpired solar facades.  - energy procedia - international conference on solar heating and cooling for buildings and industry (shc 2013).  . 

mohd syahriman mohd azmi, mohd yusof hj. othman, mohd hafidz hj. ruslan, and zafri azran abdul majid.  (2013).  thermal performance of solar collector with multi direction properties using cross absorber.  - aip conference proceeding -2012 national physics conference.  . 

mohd syariman mohd azmi, mohd yusof hj othman, mohd hafidz hj ruslan, kamaruzzaman sopian & zafri azran abdul majid.  (2013).  study on electrical power output of floating photovoltaic and conventional photovoltaic.  - aip conference proceeding- the 2013 ukm fst postgraduate colloquium.  . 

f. hussain, myh othman, b. yatim, h ruslan, k sopian & z. ibarahim.  (2013).  a study of pv/t collector with honeycome heat exchanger.  - aip conference proceeding- the 2013 ukm fst postgraduate colloquium.  . 

zamry ibrahim, zahari ibarahim, baharudin yatim, and mohd hafidz ruslan.  (2013).  thermal efficiency of single-pass solar air collector.  - 2013 ukm faculty of science and technology post-graduate colloquium; selangor; malaysia - aip conference proceedings.  90-94. 

mohd syahriman mohd azmi, mohd yusof hj othman, mohd hafidz haj ruslan & zafri azran abdul majid.  (2013).  thermal performance of solar collector with multi direction properties using cross absorber.  - 2012 national physics conference.  . 

suhaimi misha, sohif mat, mohd hafidz ruslan, kamaruzzaman sopian, elias salleh.  (2013).  the effect of drying air temperature and humidity on the drying kinetic of kenaf core.  - applied mechanics and materials.  . 

mohd syahriman mohd azmi, mohd yusof hj othman, mohd hafidz hj ruslan, kamaruzzaman sopian & zafri azran abdul majid.  (2013).  study on electrical power output of floating photovoltaic and conventional photovoltaic.  - the 2013 ukm fst postgraduate colloquium.  95-101. 

kamaruzzaman sopian, adnan ibrahim, ahmad fudholi,mohd yusof othman, mohd hafidz ruslan, hussein a. kazem.  (2013).  experimental studies on building integrated photovoltaic thermal collectors with different absorber design.  - recent advances in energy, environment and geology : 2nd international conference on energy systems, environment, entrepreneurship and innovation (iceseei `13).  . 

zamry ibrahim, zahari ibarahim, baharudin yatim, and mohd hafidz ruslan.  (2013).  experimental studies on the thermal efficiency of the single-pass solar air collector with fins.  - aip conference proceedings : 2012 national physics conference (perfik 2012).  . 

ahmad fudholi, adnan ibrahim, mohd yusof othman, mohd hafidz ruslan, hussein a. kazem, azami zaharim, kamaruzzaman sopian.  (2013).  energy and exergy analyses on water based photovoltaic thermal(pvt) collector with spiral flow absorber.  - recent advances in energy, environment and geology : 2nd international conference on energy systems, environment, entrepreneurship and innovation (iceseei `13).  70-74. 

ahmad fudholi, mohd hafidz ruslan, mohd yusof othman, lim chin haw, sohif mat, azami zaharim, kamaruzzaman sopian.  (2012).  mathematical model of double-pass solar air collector with longitudinal fins.  - proceedings of the 9th wseas international conference on heat and mass transfer (hmt `12).  . 

ahmad fudholi, mohd hafidz ruslan, lim chin haw, sohif mat, mohd yusof othman, azami zaharim, kamaruzzaman sopian.  (2012).  performance of finned double-pass solar air collector.  - proceedings of the 9th wseas international conference on heat and mass transfer (hmt `12) harvard, cambridge, usa january 25-27.  . 

ahmad fudholi, mohd zamri ibrahim, mohd hafidz ruslan, lim chin haw, sohif mat,mohd yusof othman, azami zaharim, kamaruzzaman sopian.  (2012).  techno-economics analysis of a wind / pv hybrid system to provide electricity for a household in malaysia.  - proceedings of the american conference on applied mathematics (american-math `12).  . 

ahmad fudholi, mohd hafidz ruslan, lim chin haw, sohif mat, mohd yusof othman, azami zaharim, kamaruzzaman sopian.  (2012).  mathematical modelling of brown seaweed drying curves.  - proceedings of the american conference on applied mathematics (american-math `12).  . 

azmi, msm; othman, my; sopian, k; ruslan, mh; majid, zaa; fudholi, a; yasin, jm.  (2012).  development of a solar assisted drying system using double-pass solar collector with finned absorber.  - 1st international conference on mechanical engineering research (icmer) 2011; kuantan (iop conference series-materials science and engineering).  . 

omidreza saadatian, k sopian, b r elhab, mh ruslan, nilofar asim.  (2012).  optimal solar panels tilt angles and orientations in kuala lumpur, malaysia.  - advances in environment, biotechnology and biomedicine : 1st wseas international conference on energy and environment technologies and equipment (eeete `12).  . 

msm azmi, my othman, k sopian, mh ruslan, zaa majid, a fudholi & jm yasin.  (2012).  development of a solar assisted drying system using double- pass solar collector with finned absorber.  - 1st international conference on mechanical engineering research 2011 (icmer2011) - iop conference series materials science and engineering.  . 

ahmad fudholi, mohd hafidz ruslan, mohd yusof othman, azami zaharim, kamaruzzaman sopian.  (2012).  solar open drying kinetics method for drying chilies.  - advances in environment, biotechnology and biomedicine : 1st wseas international conference on energy and environment technologies and equipment (eeete `12).  . 

ahmad fudholi, mohd hafidz ruslan, mohd yusof othman, omidreza saadatian, azami zaharim, kamaruzzaman sopian.  (2012).  investigation of medical herbs moisture in solar drying.  - advances in environment, biotechnology and biomedicine : 1st wseas international conference on energy and environment technologies and equipment (eeete `12).  . 

omidreza saadatian,k sopian, sohif bin mat,b r elhab,ch lim,m.h.ruslan.  (2012).  solar collectors as shading devices for kuala lumpur malaysia.  - advances in environment, biotechnology and biomedicine : 1st wseas international conference on energy and environment technologies and equipment (eeete `12).  . 

yousef a. eltbaakh, m.h. ruslan, m.a. alghoul, m.y. othman, m. i. fadhel1, a. zaharim & k. sopian.  (2012).  spectral transmittance under cloudless sky over bangi-malaysia.  - models and methods in applied sciences : proceedings of the 2nd international conference on environment, economics, energy, devices, systems, communications, computers, mathematics (edscm `12).  . 

ahmad fudholi, mohd hafidz ruslan, mohd yusof othman, lim chin haw, sohif mat, azami zaharim, kamaruzzaman sopian.  (2012).  cost analysis of double-pass solar collector with finned absorber.  - proceedings of the 9th wseas international conference on heat and mass transfer (hmt `12).  . 

dayang fredalina basri, ahmad fudholi, mohd hafidz ruslan, mohamad ahmed alghoul.  (2012).  study of the drying kinetics of baccaurea angulata merr. (belimbing dayak) fruit.  - recent researches in energy, environment and sustainable development : proceedings of the 6th wseas international conference on renewable energy sources (res `12).  . 

roonak daghigh, mohd hafidz ruslan, azami zaharim and kamaruzzaman sopian.  (2011).  monthly performance of a photovoltaic thermal (pv/t) water heating system.  - 6th iasme / wseas international conference on energy & environment (ee `11), cambridge(recent researches in energy and environment).  . 

a. fudholi, m. y. othman, m. h. ruslan, m. yahya, a. zaharim and k.sopian.  (2011).  design and testing of solar dryer for drying kinetics of seaweed in malaysia.  - 4th wseas int. conf. on emeseg`11, 2nd int. conf. on world-geo`11, 5th int. conf. on edeb`11; corfu island.  . 

a ibrahim, my othman, mh ruslan, s mat, a zaharim, k sopian.  (2011).  a pilot study of the building integrated photovoltaic thermal (bipvt) collector for commercial applications in malaysia.  - recent researches in geography, geology, energy, environment and biomedicine.  139-142. 

tri suyono, sohif mat, muhammad yahya, muhd. hafiz ruslan, azami zaharim, kamaruzzaman sopian.  (2011).  theoretical and experimental analysis of desiccant wheel performance for low humidity drying system.  - 10th wseas international conference on system science and simulation in engineering (icossse `11).  . 

ahmad fudholi, mohd. yusof othman, mohd hafidz ruslan, muhammad yahya, azami zaharim, kamaruzzaman sopian.  (2011).  techno-economic analysis of solar drying system for seaweed in malaysia.  - proceedings of the 7th iasme/wseas international conference on energy, environment, ecosystems and sustainable development (eeesd `11) angers, france november 17-19, 2011.  . 

kamaruzzaman sopian, goh li jin, mohd. yusof othman, saleem h. zaidi, mohd hafidz ruslan.  (2011).  advanced absorber design for photovoltaic thermal (pv/t) collectors.  - proceedings of the 7th iasme/wseas international conference on energy, environment, ecosystems and sustainable development (eeesd `11).  . 

r. daghigh, m.h. ruslan, a.zaharim, k. sopian.  (2011).  effect of packing factor on the performance of pv/t water heater.  - 6th iasme / wseas international conference on energy & environment (ee `11), cambridge, uk.  . 

a. ibrahim, m. y. othman, m. h. ruslan, s. mat, a. zaharim and k. sopian.  (2011).  a pilot study of the building integrated photovoltaic thermal (bipvt) collector for commercial applications in malaysia.  - 4th wseas international conference on engineering mechanics, structures, engineering geology, emeseg`11.  . 

yousef a. eltbaakh, m.h. ruslan, m.a. alghoul, m.y. othman, a. zaharim and k. sopian.  (2011).  effect of cloudless sky parameters on global spectral solar radiation within 0.3-1.1 im region.  - 4th wseas international conference on engineering mechanics, structures, engineering geology, emeseg`11.  . 

a. fudholi, m. y. othman, m. h. ruslan, m. yahya, a. zaharim and k. sopian.  (2011).  the effects of drying air temperature and humidity on the drying kinetics of seaweed.  - 4th wseas international conference on engineering mechanics, structures, engineering geology, emeseg`11.  . 

adnan ibrahim, mohd yusof othman, mohd hafidz ruslan, sohif mat, azami zaharim and kamaruzzaman sopian.  (2010).  experimental studies on water based photovoltaic thermal collector (pvt).  - proceedings of the wseas international conferences, 9th wseas international conferences on system science and simulation in engineering (icossse '10), iwate prefectural university, japan.  . 

a. fudholi, m.h. ruslan, m.y. othman, m. yahya, supranto, a.zaharim and k. sopian.  (2010).  experimental study of the double-pass solar air collector with staggered fins.  - proceedings of the wseas international conferences, 9th wseas international conferences on system science and simulation in engineering (icossse '10), iwate prefectural university, japan.  . 

goh li jin, hafidz ruslan, sohif mat, mohd. yusof othman, azami zaharim and kamaruzzaman sopian.  (2010).  experiment study on single-pass photovoltaic-thermal (pv/t) air collector with absorber.  - proceedings of the wseas international conferences, 9th wseas international conferences on system science and simulation in engineering (icossse '10), iwate prefectural university, japan.  . 

r. daghigh, m.h. ruslan, a. zaharim and k. sopian.  (2010).  air source heat pump system for drying application.  - proceedings of the wseas international conferences, 9th wseas international conferences on system science and simulation in engineering (icossse '10), iwate, japan.  . 

a. fudholi, m.h. ruslan, m.y. othman, m. yahya, supranto, a. zaharim and k. sopian.  (2010).  collector efficiency of the double-pass solar air collectors with fins.  - proceedings of the wseas international conferences, 9th wseas international conferences on system science and simulation in engineering (icossse '10), iwate prefectural university, japan.  . 

adnan ibrahim, mohd hafidz ruslan, sohif mat, mohd yusof othman, azami zaharim, k. sopian.  (2009).  predicting the characteristics of a special designed photovoltaic thermal collector absorber (pvt).  - proceedings of the 3rd wseas int. conf. on renewable energy sources.  336-341.