|Dr. Mahmoud Hussein
'Phononic Kitchen Tiles'
The picture shows an array of optimal designs of phononic crystals designed to minimize wave propagation across a broad frequency range. The black and white colors respectively represent materials with high stiffness and density and low stiffness and density. The ratio of stiffnesses in each design increases along the rows, and the ratio of densities increases along the columns. The designs were computer generated using genetic algorithms and finite element analysis. Acknowledgement: My collaborators Karim Hamza, Gregory Hulbert and Kazuhiro Saitou.