In the last decade an increasing number of farmers worldwide have adopted the technique of ammoniation as a means of increasing the utilisation of roughages by ruminants, Our work has identified problems with ammoniation which are similar to those encountered with ammoniated molasses in the 1950%. Since July 1984 there have been several outbreaks of hyperexcitability in cattle fed ammoniated ro...

In this paper we study the art gallery problem, which is one of the fundamental problems in computational geometry. The objective is to place a minimum number of guards inside a simple polygon so that the guards together can see the whole polygon. We say that a guard at position x sees a point y if the line segment xy is contained in the polygon. Despite an extensive study of the art gallery pr...