![]() The pavement stiffness uniformity characteristics of a high-strength flexible test section at the NAPTF were successfully mapped from FWD deflection data using the ANS based backcalculation models. Madias has co-authored over 100 articles published in peer reviewed journals. He is also a professor of medicine, specializing in Nephrology, at the Tufts University School of Medicine. ![]() Elizabeths Medical Center in Boston, Massachusetts. A finite-element pavement structural model, which can account for nonlinear, stress-dependent behavior of pavement geomaterials, was used to generate the ANS training and testing database. Madias, MD, is the chair of the department of medicine at the St. KGPBACK is specific version of BACKGA program. Federal Aviation Administration's (FAA's) National Airport Pavement Test Facility (NAPTF). In this study, two programs, namely KGPBACK and KUAB, were used for analysis of FWD data. In this study, Artificial Neural Systems (ANSs) based models were used to predict flexible airport pavement layer moduli from realistic FWD deflection basins acquired at the U.S. The Falling Weight Deflectometer (FWD) is a Nondestructive Test (NDT) equipment used to assess the structural condition of airfield pavement systems and to determine the moduli of pavement layers which are not only good condition indicators, but are also necessary inputs for conducting mechanistic based pavement structural analysis. Non-Destructive Test (NDT) and evaluation methods are well-suited for characterizing materials and determining structural integrity of pavement systems. ![]() A critical issue concerning the deterioration of ageing road infrastructure all around the world is the need to rapidly and cost-effectively evaluate the present condition of pavement infrastructure. ![]()
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