http://en.wikipedia.org/wiki/Displaced_threshold displaced threshold http://en.wikipedia.org/wiki/Displaced_threshold http://en.wikipedia.org/wiki/Displaced_threshold http://en.wikipedia.org/wiki/Displaced_threshold http://en.wikipedia.org/wiki/Displaced_threshold displaced threshold http://en.wikipedia.org/wiki/Displaced_threshold displaced threshold http://en.wikipedia.org/wiki/Displaced_threshold displaced threshold http://en.wikipedia.org/wiki/Displaced_threshold