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Effect of soil pH and texture on the ratio of denitrification end products
(2022-12)
Nitrous oxide (N₂O) is a potent greenhouse gas that contributes to stratospheric ozone depletion and global climate change. Denitrification has two potential end products, N₂O and dinitrogen (N₂), and the ratio of these ...
Dual statistical approach for correlation of shear wave velocity with the SCPTu parameters
(2022-07)
Over 30 years of research in the field of shear wave velocity (Vₛ) estimation, scores of researchers were successful in modeling Vs using the Seismic Cone Penetration Test (SCPT) parameters. Through this research work, by ...
Camber, prestress loss, and determination of distribution factors in pretensioned concrete girder bridges
(2022-12)
This research investigates prestress losses and camber of Prestressed Concrete bridge beams (PC Beams), and the performance and load testing of the SH 4 Bridge over the North Canadian River in Canadian County, OK. The ...
Compaction studies on open-graded aggregate materials: Moving towards deflection-based compaction control
(2022-12)
Compaction quality control of unbound aggregate layers in pavements has been typically based on target density values, which are defined in reference to the highest densities that can be achieved in the lab using standardized ...
Suitability of elutriation for the extraction of microplastics from natural soils
(2022-12)
Microplastics are a class of emerging contaminant which pose serious risks to the health and safety of terrestrial and marine ecosystems. Much research has been conducted regarding the prevalence of microplastics in marine ...
Feasibilty study of elemental recovery from Oklahoma produced waters using advanced membrane technologies
(2022-07)
Hundreds of millions of barrels of wastewater are produced by the oil and natural gas industry every year. The disposal practices associated with these produced waters (PW) are unsustainable and linked to lowered standards ...
Comparing concrete performance using conventional and alternative coal ash
(2022-07)
Fly ash is widely used as a supplementary cementitious material in concrete as it can contribute to strength gain and increased durability of the concrete. The coal ash production volume has decreased in recent years due ...