31.  Dr. Kai Nagel, a leading builder of mathematical models at Los Alamos, said that complexity was one of the similarities between traffic and weather.

32.  During World War I, an English ambulance driver in France, Lewis Fry Richardson, developed an idea for predicting weather through mathematical models.

33.  Dozens of mathematical models of the atmosphere and things that affect it are being applied to the problem.

34.  Dr. Thomas A. Witten, another author of the Physical Review Letters paper, has worked for years on a mathematical model of crumpling.

35.  For at least a year, they had spent their summers and weekends and evenings pondering mathematical models, or probing the medicinal mysteries of a Ghanaian tree.

36.  From his work with small toys, Noel developed a mathematical model that could apply to vehicles of any size.

37.  He developed a comprehensive mathematical model of fluid flow, electromagnetics, and heat transfer in metal processing.

38.  Her mathematical models showed that it made sense.

39.  I developed mathematical models that predict behavior in certain circumstances -- how the system can process information.

40.  In Belgrade, statistician Srdjan Bogosavjevic once tried to figure out a mathematical model for dividing Bosnia, Serbia and Croatia along ethnic lines.