Nature provides much inspiration for the design of materials capable of motion upon exposure to external stimuli, and many examples of such active systems have been created in the laboratory. However, ...

When a particle, in a medium like water, is set into oscillatory motion, the neighbouring particles are also set into oscillatory motion due to the elastic forces. A wave disturbance starts spreading ...

Oscillating motion can quickly destroy even over-sized bearings. Understanding and treating the problem, rather than the symptoms, is the cure. Grease both lubricates and keeps contaminants out of ...