Drop impact in a Photoelastic material. Fringe patterns (dark field configuration) are observed at a specific time during the impact of a water droplet (velocity = 2m/s, radius = 2mm) on an elastic gelatin block (dimension: 10mm x 40mm x 40 mm, Young's modulus = 30 kPa).

Turing's pattern in Reaction-Diffusion-Advection equations. Turing patterns can emerge from nonlinear equations, such as those found in the Brusselator model of chemical kinetics, incorporating physical phenomena like diffusion and advection. In this case, the orange region represents the maximum concentration of a substrate (activator), while the purple region indicates the minimum (or maximum concentration of inhibitor). 

Modified SIR model with vaccination and two strains. This schematic represents a nonlinear epidemic model based on the SIR framework (Susceptible, Infected, Recovered). It illustrates the interaction among eight distinct population groups. The arrow in the yellow region indicates a mutation between strains. To our knowledge, this is the first model to incorporate vaccination, the coexistence of two strains, and the possibility of mutation between them. 

The video shows a surface wave generated in a circular channel experiment. The motion was induced by an oscillating paddle located at the bottom of the channel, with an amplitude of about 10 mm. The circular channel has a diameter of approximately 1 m.