Background: The airline industry produces large amounts of operational and customer-service data connected with passenger travel experience, operational efficiency, and service quality. Passenger satisfaction has become an important indicator of airline competitiveness because cu...
Open access
Research Article10.9734/jerr/2026/v28i51907
The effects of threshing drum speed of an acha thresher at three levels of 450, 550 and 650 rpm; feed rate at three levels of 200, 400 and 600 g/min and sieve size at three levels 2.0, 2.5 and 3.0 mm on the threshing efficiency, cleaning efficiency, separation efficiency, drum lo...
Open access
Research Article10.9734/jerr/2026/v28i51903
The frequency of occurrence of earthquakes in Nigeria, and its neighbouring regions of Cameroon, and the Gulf of Guinea is on the rise. This work aims to assess the potential seismic hazards in these regions and compute earthquake recurrence parameters (b-value, activity rates, a...
Open access
Research Article10.9734/jerr/2026/v28i51902
Rolling bearings are key components in mechanical transmissions, and grease serves as the core medium ensuring their stable operation. It reduces friction and wear, dissipates heat, seals against dust, and directly extends bearing service life. This paper systematically reviews f...
Open access
Research Article10.9734/jerr/2026/v28i51901
Background: Anaerobic digestion of blackwater is attractive for sanitation and resource recovery in high-altitude regions, but low pressure, low oxygen availability and cold stress can slow hydrolysis, acid conversion and methanogenesis. Aims: This study evaluated whether biochar...
Open access
Research Article10.9734/jerr/2026/v28i51900
Proton exchange membrane fuel cells (PEMFCs) have emerged as a research hotspot in the clean energy sector due to their high efficiency, zero pollution, and rapid startup capabilities. As the core structural component, metal bipolar plates—whose corrosion resistance and electrica...
Open access
Research Article10.9734/jerr/2026/v28i51899
South Sulawesi Province, Indonesia, is one of the major rice-producing regions where transportation plays an important role in maintaining the stability of agricultural supply chains. This study analyzes the performance of two-axle truck transportation in rice distribution within...
Open access
Research Article10.9734/jerr/2026/v28i51898
The Brent Field, located in the UK North Sea (Block 211/29), represents one of the largest hydrocarbon accumulations in the United Kingdom Continental Shelf, discovered in 1971. This comprehensive study analyzes the performance of the Brent Field as a gas cap drive oil reservoir,...
Open access
Research Article10.9734/jerr/2026/v28i51895
The technology behind artificial intelligence is shifting the way schools are approaching the learning process as there are now new systems that offer opportunities to improve the way learning is supported. This paper takes a deeper look into how machine learning, deep learning,...
Open access
Research Article10.9734/jerr/2026/v28i51896
Ehwarieme Favour Omoyoma, Edema Oforitsenere Shadrach, Nwankwo Princess Christiana, Cleophas Joshua & Obaremi Francis Ufuoma·Journal of Engineering Research and Reports·2026
Enhanced oil recovery (EOR) remains a critical strategy for maximising hydrocarbon extraction from mature reservoirs, where conventional primary and secondary methods typically leave 60–70% of original oil in place (OOIP). Nanoparticles—engineered materials with at least one dime...
Open access
Research Article10.9734/jerr/2026/v28i51897