OBJECTIVE to analyze the effect of the modifications in the Cockcroft-Gault equation for creatinine clearance rate determination (CrCl) and its concordance with the real value determined from 24-hours urine collection in a sample of Latin American patients hospitalized in San José de Costa Rica. METHOD an observational, retrospective study, with patients submitted to a 24-hour urine collectio...

BACKGROUND/AIMS Adults with congenital heart disease exhibit a 3-fold higher mortality in the presence of chronic kidney disease, hence assessment of renal function is crucial in this patient population. Formulas for the estimation of glomerular filtration rate (GFR) have not been evaluated in this patient population. Therefore, this study compares different markers and equations for the estima...

This study presents reviews of the failure criteria to capture resulting response due catastrophe ship collision and grounding using finite element. Researchers have introduced several criteria, for instance, DNV RP-C204 criterion, Germanischer Lloyd Peschmann, RiceTracey Cockcroft-Latham (RTCL), Bressan-Williams-Hill (BWH) instability Liu criterion. As in mathematical formula, each criterion h...

Two-high screw piercing of steel 50 billets was performed at feed angles 15 and 18 degrees. Piercing stopped 10–12 mm distance from the rear end billet. Axial fracture registered degrees angle in front mandrel nose, while no observed angle. for similar parameters simulated using DEFORM finite element analysis software, several criteria were used prediction. Ayada criterion ineffective, as evide...

The article presents an innovative method of forming hollow rail axles by cross rolling (CR) in a 3-roll mill. Assessing the correctness concept was conducted with numerical simulations Forge® NxT v.3.0. In order to investigate whether limitation form material cracking would occur analysed process critical values damage function for 42CrMo4 grade steel were determined. A new calibrating test, b...

This study is the first part of a project that aims to assess and model impact-induced energy release (IIER). The present work investigates failure mode brittle commercial pyrophoric alloy samples during Taylor impact tests. A series ferrocerium specimens were shot against tungsten carbide anvils, with velocities ranging between 60 140 m/s. Total Lagrangian SPH was employed simulate deformation...