Roslan Umar

Optimization of biodiesel production by solid acid catalyst derived from coconut shell via response surface methodology

Azizah Endut, Sharifah Hanis Yasmin Sayid Abdullah, Nur Hanis Mohamad Hanapi et al. · International Biodeterioration & Biodegradation · 2017 · 100 citations

Solid Acid Catalyst, Chemical Engineering, Engineering +9

Spatial assessment and source identification of heavy metals pollution in surface water using several chemometric techniques

Azimah Ismail, Mohd Ekhwan Toriman, Hafizan Juahir et al. · Marine Pollution Bulletin · 2016 · 93 citations · Full text

Pollution Detection, Environmental Monitoring, Engineering +11

Population density effect on radio frequencies interference (RFI) in radio astronomy

Roslan Umar, Zainal Abidin, Zainol Abidin Ibrahim et al. · AIP conference proceedings · 2012 · 47 citations

Rf Devices, Wireless Communications, Engineering +21

Road Traffic Accident in Malaysia: Trends, Selected Underlying, Determinants and Status Intervention

Mohd Khairul Amri Kamarudin, Noorjima Abd Wahab, Roslan Umar et al. · International Journal of Engineering & Technology · 2018 · 42 citations · Full text

Safety Science, Traffic Enforcement, Injury Prevention +16

Identification Source of Variation on Regional Impact of Air Quality Pattern Using Chemometric

Azman Azid, Hafizan Juahir, Ezureen Ezani et al. · Aerosol and Air Quality Research · 2015 · 40 citations · Full text

Environmental Monitoring, Engineering, Air Pollution Measurement +20