Hi!
Not a clue as to what you're talking about ...
It really looks like a pigeon model of Maxwell demon... But my mind is
warped by mathematics and some other related things...
Hmmm... Odd, but may be I messed the language again...
In theory of thermodynamics, it is said that gas particles are spread
evenly inside the volume that they occupy. Now, imagine a membrane that
is put exactly in the middle of the volume that allows gas particles to
go only in one direction. Then eventually all of them will be collected
in just half of the volume...
One of the (probably humorous) names of such a membrane is a Maxwell
demon...
Looking at the pigeons and the fence my warped mind immediately saw a
Maxwell demon...
Boris