Computer models are often used for simplicity, or when studying the real thing just ain't viable, but most look at an isolated process.

ENGADGET: Scientists create first computer simulation of a complete organism

And today, those who advocate violent opposition are being increasingly isolated by Sunnis who choose peaceful participation in the democratic process.

NPR: Bush Reaffirms Iraq Strategy

He looked misplaced, isolated, someone who could easily be the man we were in the process of imagining.

NEWYORKER: Midnight in Dostoevsky