We advance an original assumption whereby a good state of the environment positively affects labor productivity in R&D such that deteriorating environmental quality negatively impacts R&D. We study the implications of this assumption for the optimal solution in an R&D-based model of growth,...

On modifie le modèle leader-imitateur de Barro et Sala-i-Martin [1997] en supposant qu?au fur et à mesure que le retard technologique s?accroît, la productivité de la R&D (i) d?abord augmente puis diminue dans la région en retard, et (ii) elle diminue dans la région leader pour des retards...

This paper presents a novel approach for the design and simulation of variable-speed drives when the control algorithm is to be implemented in an Field Programmable Gate Array (FPGA). The specialized Simulink tools used and the design procedure are presented. An application example using a...