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A novel approach to simulate Cellular Neural Networks (CNN) is presented in this paper. The approach, time-multiplexing simulation, is prompted by the need to simulate hardware models and test hardware implementations of CNN. For practical size applications, due to hardware limitations, it is impossible to have a one-on-one mapping between the CNN hardware processors and all the pixels of the i...

In recent years it has been increasingly recognized that biochemical signals are not necessarily constant in time and that the temporal dynamics of a signal can be the information carrier. Moreover, it is now well established that the protein signaling network of living cells has a bow-tie structure and that components are often shared between different signaling pathways. Here we show by mathe...

On a long journey by sea from London to Bombay, the physicist C.V. Raman spent his time gazing at the ocean blue. Unsatisfied by a common explanation that the blue color was a reflection of the sky, he went on to show that the scattering of sunlight by water molecules gave the sea its color. His discovery of this phenomenon, named the “Raman effect,” supported the theory of the dual nature of m...

1 Cognitive Neuroimaging Unit, CEA DRF/Joliot, INSERM, Université Paris-Sud, Université Paris-Saclay, NeuroSpin center, 91191 Gif-sur-Yvette, France; 2 LTCI, Telecom ParisTech, Université Paris-Saclay, Paris, France; 3 Inria, Université Paris-Saclay, Saclay, France; 4 CEA, Université Paris-Saclay, Gif-sur-Yvette, France ; 5 Neuro-PSI, Université Paris-Sud, Université Paris-Saclay, CNRS, Orsay, ...

Shift multiplexing is a holographic recording method that uses a spherical reference wave. We extend the principle to a thin slab of holographic material that acts as a waveguide. Total internal reflection folds the reference spherical beam in one dimension. We demonstrate that the shift selectivity with the folded spherical beam is independent of the slab thickness but depends instead on the n...