It would not be difficult to extend the rather simple model described above.

Ozone is one example where the "simple" models just do not work very well.

Future research is likely to consider improvements in some or all of these areas as compared to the simple models.

The students also run a simple model of a Television news network.

"We designed the system around a simple model: How would a human do it?"

I've tried for years to have a very simple model.

This was meant to be a simple model that would have been easy to make a lot of for not very much money.

Why has this simple model succeeded for more than 40 years?

The other store, he said, had simpler models at $30.

So, we have now described a simple model with two reactions.