51.  Physicists created good mathematical models of how light, touch and sound affect the human body many hundreds of years ago.

52.  Quantitative investing uses computers with sophisticated mathematical models to crunch reams of numbers on stock prices and earnings estimates.

53.  Reporting the results of a mathematical model, Hall said Microsoft overpriced Windows, taking advantage of its market power.

54.  Scientifically based predictions, typically using computerized mathematical models, have become pervasive in modern society.

55.  Scientists usually rely on a mathematical model in estimating radiation risk.

56.  So she is comparing clams in polluted and unpolluted waters to see how many offspring they produce and then incorporating her data into mathematical models that project populations.

57.  Speech-recognition systems work by converting sounds into mathematical models.

58.  That led him to create mathematical models to describe electrical activity in the brain, trying to understand how the nervous system sends messages back and forth.

59.  Sung was building a reputation in the option world, where complex mathematical models are used to build and manage big portfolios.

60.  The answers to these questions are suggested by the mathematical model, Perelson said.