Oscillation, Bay City, Texas, summer 2015. Painting, Oil on canvas. Size: 48 W x 36 H in (122 W x 91.4 H cm). © 2014 Florencia San Martin Brück/Artists Rights Society (ARS), New York.
Oscillations occur not only in mechanical systems but also in dynamic systems in virtually every area of science: for example the beating human heart, business cycles in economics, predator-prey population cycles in ecology, geothermal geysers in geology, vibrating strings in musical instruments, periodic firing of nerve cells in the brain, and the periodic swelling of Cepheid variable stars in astronomy.