Pediatric blunt renal trauma with wide fragments dislocation: successful organ saving management by internal stenting and percutaneous perirenal drain

Children have an high risk of renal damage as a result of blunt trauma. Conservative management is always recommended for lower grades (I to III) but is rather controversial whenever high grade injuries (grade IV and V) are concerned. We describe a case of successful conservative management in grade IV renal injury occurred in a 9-years-old girl with blunt trauma

A evolução do conceito de operante

O conceito de operante surge nos anos 30 como necessidade, dada a dificuldade encontrada por Skinner para analisar seus dados usando como ferramenta o conceito de reflexo. O presente trabalho apresenta a evolução do conceito até o presente, quando a unidade de análise não tem mais a ver com a estrutura do comportamento: a nova ferramenta é o conceito de contingência tríplice

Towards a four factor theory of anticipatory learning

This paper takes an overtly anticipatory stance to the understanding of animat learning and behavior. It analyses four major animal learning theories and attempts to identify the anticipatory and predictive elements inherent to them, and to provide a new unifying approach based on the anticipatory nature of those elements based on five simple predictive “rules”. These rules encapsulate all the principal properties of the four diverse theories (the four factors) and provide a simple framework for understanding how an individual animat may appear to operate according to different principles under varying circumstances. The paper then indicates how these anticipatory principles can be used to define a more detailed set of postulates for the Dynamic Expectancy Model of animat learning and behavior, and to construct its computer implementation SRS/E. Some of the issues discussed are illustrated with an example experimental procedure using SRS/E

Search for 'eta' meson production in heavy ions collisions at 100 MeV/nucleon

Consiglio Nazionale delle Ricerche (CNR). Biblioteca Centrale / CNR - Consiglio Nazionale delle RichercheSIGLEITItal