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This manuscript describes the application of the tools of the NPRG framework to two out-of-equilibrium systems. On the one hand, we used the modified local potential approximation to investigate the absorbing phase transition occurring in the diffusive epidemic process and its coarse-grained counterpart, the directed percolation with a conserved quantity. On the other hand, we investigated the large wave-number expansion of the exact RG flow equation of the correlation functions in fully developed turbulence.
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