Recently, particular attention has been paid to the stepped spillways due to the increasing effect of energy dissipation and the reduction of cavitations risks with the development of Roller Compacted Concrete (RCC) technique. Flow regimes on the spillways divide into three groups, namely skimming, jet and transition flow. Compared to the numerical methods, the majority of performed studies in ...

Three-dimensional (3D) simulations using the smoothed particle hydrodynamics (SPH) method were performed for smooth and stepped spillways with converging walls, in order to evaluate influence of wall deflection step macro-roughness on main non-aerated flow properties. The encompassed a 1V:2H sloping spillway, convergence angles 9.9° 19.3°, discharges corresponding skimming regime, chute. overal...

The objective of this study was to evaluate the effects of acclimation to handling on growth, plasma concentrations of progesterone (P4) and cortisol, temperament, and reproductive performance of Brahman-crossbred heifers. Over 2 consecutive years, 37 Braford and 43 Brahman x Angus heifers were initially evaluated, within 30 d after weaning, for BW and puberty status via transrectal ultrasonogr...

ABSTRACT Aerator systems promote additional insertion of air into the flow and can reduce risk cavitation consequent damage to hydraulic structures. This work analyzes hydrodynamic pressures on steps a physical model (with chute inclination 53.13º) subjected different aeration conditions. When comparing results with intake coefficients in flow, it was concluded that incorporation does not chang...

Profitability of a beef operation is determined by the proportion of cows attaining pregnancy early in the breeding season and those that are pregnant at the end of breeding season. Many factors, including temperament, contribute to those reproductive parameters. The objective of this study was to evaluate effects of temperament on reproductive performance of beef cows. In Experiment 1, Angus a...

It is demonstrated that an array of N dual-polarized antennas can cancel up to 2N-1 broadband interferers, while still maintaining a high probability of GPS satellite availability.