Force fields; are they possible?

Okay, so Cecil has shot down colonising the planets. But is a force field, ˆ la Star Trek, actually possible without incinerating someone trying to get through it?

I mean the old-fashioned kind that gives you a light buzz when you brush up against it.

Surely the armed forces are working feverishly on such a project.

Hmm, did a search and that thread didn’t show up . . . thanks.

[ul]Try this[/ul]

They can float a frog on a sufficiently powerful magnetic field so if they can extrapolate that force in some manner it might be possible to push a human away, but the power needed to do this would be absurd vs using more conventional methods.

Some Levity in Physics