Fiat Stilo the 1.8 16v engine was retired. In the Americas, the Stilo was partially replaced by the new Bravo in the end of 2010, when it will be built in Brazil; from 2007 on the Italian import is available in Chile and Venezuela. Fiat Automóveis introduced a facelifted Stilo in the end of January 2008, in which the Dualogic manual robotized gearbox was released, being available to every version with the 1.8 8v Flex engine, which now produces (petrol) or when using ethanol as fuel. The car also got minor cosmetic changes to front grille, bonnet, side bumpers and to the
Quantitative models of the action potential that again, there are only two time-dependent variables: the transmembrane voltage "V" and the potassium gate probability "n". The bursting, entrainment and other mathematical properties of this model have been studied in detail. The simplest models of the action potential are the "flush and fill" models (also called "integrate-and-fire" models), in which the input signal is summed (the "fill" phase) until it reaches a threshold, firing a pulse and resetting the summation to zero (the "flush" phase). All of these models are capable of exhibiting entrainment, which is commonly observed in nervous systems. Whereas the above models simulate the transmembrane