Managing Australia's water resources

We have a great power not to destroy and in exercising that power, we will give proof of our consideration for the future, and for the first time in our history we will be recognised as custodians of the earth. Tasmania has rivers flowing to the sea … these are great natural energy resources just crying out to be developed and developed they must be.     

Statistical Tests and Process Generators For Random Field Models

Two alternative specifications for random fields are reviewed and models from both specifications identified. The paper then deals with statistical tests for discriminating between randomness and some of the models of dependence. These various tests are compared and criteria established for their use. Additional testing procedures are identified for the more difficult problem of distinguishing between models of dependence. The paper then looks at different process generators for certain random field models and concludes with a discussion of the importance of the theory for handling diffusion processes. The value of these results for both model specification and “form-process” studies is emphasized.     

A SIMPLE INSTRUMENT FOR MEASURING THE DENSITY OF SOLID OBJECTS

A simple and easily constructed instrument is described for the direct measurement of the volume of solid objects, such as coins, to a high accuracy. The density of the object is readily calculated by dividing the weight of the object by its volume.     

ON THE ORIGIN OF GREY AND BLACK ‘COLOURS’ OF ANCIENT POTTERY: ROLE OF Fe AND Ti4+ IONS

It is shown, from comparisons with the optical absorption of minerals, that the black and grey colours of pottery can arise from Fe²⁺ Fe³⁺ and Fe²⁺ Ti⁴⁺ charge-transfer (or electron-hopping) processes, the cations being located at the centres of adjacent edge-sharing octahedra.     

Models of Space Searching in Urban Areas

City dwellers occasionally must seek jobs, dwellings, or particular services or goods. Two very different ways exist by which the individual may conduct such a search. Lacking prior information, the person may elect to visit perceived possible locations until an appropriate one is found. Alternatively, an address may first be ascertained and then visited by finding a path to it. Clearly, there is a substantial difference between these two methods in terms of the amount of spatial movement they require in order to satisfy the searcher's needs. In this paper, this difference is modeled for situations that vary in terms of the density of acceptable end points of the search, as well as in characteristics of the signs of these end points, their patterns, and the level of information with which the searcher may begin.