An Experimental Investigation on The Effects of Waste Olive Oil Biodiesel on Combustion, Engine Performance and Exhaust Emissions, The use of waste transformer oil as alternative fuel in a diesel power generator, Experimental evaluation on noise reduction performance of a motorcycle helmet, The impacts of diesel and canola biodiesel fuels on noise emission on diesel engines, Determination of effects of compression ratio variation on performance and emission characteristics of a diesel engine fueled with EDTA-doped sunflower biodiesel-petrodiesel