First, though, he needed a baseline from which to measure change.

There is, after all, no absolute way to measure change.

This can measure changes in the gravity field over time.

A temporal dimension is one way to measure physical change.

It is also used for measuring minute changes of temperature.

Here are the rules on terminology, choice of estimates, and how to measure change.

However, results similar to these have never been seen in other studies measuring endocrine changes.

This can be achieved by measuring optical changes in the field of view.

Doctors may also use brain imaging technology to measure changes in structure or activity.

Funds are ranked by "total return," which measures changes in share price plus income.