Quarry blasts can be effective, low-cost energy sources for seismic imaging, provided that one can deconvolve the extended source signatures produced by ripple firing. This study uses real and synthetic quarry-blast data to compare the performance of several methods for deconvolving mixed-delay signals. The problem considered here is the recovery of the effective source function along a given a...

In this research study, environmentally friendly unburnt coal ash (CA) bricks were investigated as an alternative to conventional burnt clay bricks. various physical and mechanical properties of CA investigated. The prepared by using 60% 10% lime weight. these bricks, varying cement contents (5%, 10%, 15%), sand (10% quarry dust (5% 10%) weight used. A forming pressure 29 MPa was applied throug...

When assessing the ecological state of drained agricultural landscapes exposed to pollution, average daily dust load, chemical composition snow cover lands, elemental soils and yield perennial fodder grasses were determined. Snowfall, which is a good indicator airborne technogenic fallouts, was classified as contaminated near mining site, opposed case road traffic. Although load very high total...

The Cleveland-Lloyd Dinosaur Quarry (CLDQ) is the densest deposit of Jurassic theropod dinosaurs discovered to date. Unlike typical Jurassic bone deposits, it is dominated by the presence of Allosaurus fragilis. Since excavation began in the 1920s, numerous hypotheses have been put forward to explain the taphonomy of CLDQ, including a predator trap, a drought assemblage, and a poison spring. In...

In spite of broad improvements in construction technology, cement is still stayed as binding material for construction purposes. Cement industries are the main sources for the contribution of carbon dioxide (co2) into the atmosphere. So, there is a need to use new materials as binders (green binders) in substitute for cement, which leads to reducing the production of cement. In this study, fly ...