Renault Twingo of their existing partnership, announced "Project Edison", a collaboration aimed at conceiving a shared platform for small city cars to be shared by both companies. The first cars using the platform were the third generation Twingo and the second generation Smart Forfour. Renault and Daimler invested equally during the research and development phase, with Renault subsequently specializing in the engines and Daimler in transmissions. Both companies tried to ensure a distinctive design. Renault designers took inspiration from the Renault 5. and the first generation Twingo, The car was originally launched with four colour options, as with the original Twingo. 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