There is a large branch of mathematics which this is tied to called Knot Theory, I'll bet you could find some practical applications associated to it. (http://e

There is a large branch of mathematics which this is tied to called Knot Theory, I'll bet you could find some practical applications associated to it. (http://en.wikipedia.org/wiki/Knot_theory http://en.wikipedia.org/wiki/Knot_theory)