We consider an optical pulse propagating in a tapered photonic crystal fiber (PCF) wherein dispersion as well as nonlinearity varies along the propagation direction.The generalized nonlinear Schrödinger equation aptly models the pulse propagation in such a PCF.The design of the tapered PCF is based on the analytical results, which demand th
Directional heat transfer was investigated by temperature measurements in the casting and in the mould using thermocouples.Measurements were performed in operating conditions during pouring, lochby venture pouch solidification, and cooling of the casting.Total measurement time was 35,5 hours.After cutting, specimens were extracted for metallographi
Introduction: One of the health indicators of the newborn children is low birth weight (LBW) - weight less than 2,500g - which can be determined by the influence of several reasons, such as, maternal, fetal, placental and environmental factors.Objective: To determine the prevalence and factors associated with LBW in the state of Minas Gerais (MG),