ECA diameter, which is the logical measure to use with spheres, is the diameter of a circle which shares an equivalent projected area with the actual particle. Beads habitually bunch together, and the ...

An optical storage system that uses tiny polystyrene spheres could have a capacity ten times that of a DVD. An optical storage system with a recording density of up to ten times that of a DVD is under ...

A collaboration of British and Iranian physicists has created an armada of self-propelled polystyrene balls about as wide as a strand of your hair. Their efforts are moving toward self-propelled ...