The worldwide interest in various fluidised-bed combustion systems is surveyed. The stage of development reached towards fully commercial boiler systems using fluidised-beds operating at atmospheric pressure for a range of applications from small shell boilers to power generating units is...

This article seeks further evidence on the elasticity of calorie demand with respect to household resources. The case presented is for urban areas of Papua New Guinea, where just over one-half of the population appear to obtain less than the recommended amount of dietary energy. The relationship...