Bound state of dimers on a spherical surface

The study of particle motion on spherical surfaces is relevant to adsorption on buckyballs and other solid particles. This paper reports results for the binding energy of such dimers, consisting of two light particles (He atoms or hydrogen molecules) constrained to move on a spherical surface. The binding energy reaches a particularly large value when the radius of the sphere is about 3/4 of the particles' diameter.Comment: 6 pages, 3 figures, submitted to JLTP, conference proceedings QFS 200

Irrigation in south-western Australia

THE pattern of irrigation in South-Western Australia is constantly changing, At present, the main increase is in the private sector. In the past century, there has been a see-saw effect from private to Government to private schemes

Water economy for lawns and gardens

Much of the summer water consumption occurs because it is widely believed that heavy summer watering is necessary. Householders often mistakenly water heavily to keep their gardens green and growing. Many may not realise that gardens can be kept vigorous and healthy with much less water than is commonly applied

Siphon tubes for furrow irrigation in the Kimberleys

Irrigation soils in the Ord River area have a high clay content and erode easily under the influence of running water. To overcome the problem of erosion in cuts between the head channels and irrigation furrows polythene siphon tubes have been found the most satisfactory. In this article K. S. Cole, B.Sc. (Agric), Agricultural Adviser, Kununurra, describes the use of siphon tubes for furrow irrigation in the Kimberleys

A webometric analysis of Australian Universities using staff and size dependent web impact factors (WIF)

This study describes how search engines (SE) can be employed for automated, efficient data gathering for Webometric studies using predictable URLs. It then compares the usage of staffrelated Web Impact Factors (WIFs) to sizerelated impact factors for a ranking of Australian universities, showing that rankings based on staffrelated WIFs correlate much better with an established ranking from the Melbourne Institute than commonly used sizedependent WIFs. In fact sizedependent WIFs do not correlate with the Melbourne ranking at all. It also compares WIF data for Australian Universities provided by Smith (1999) for a longitudinal comparison of the WIF of Australian Universities over the last decade. It shows that sizedependent WIF values declined for most Australian universities over the last ten years, while staffdependent WIFs rose

Native plants : water savers in the garden

The climate of Western Australia may be one of the best in the world for people but it is a difficult one for many of our imported, and common garden plants. as a consequence, some 70 per cent of our summer water usage is for gardens and lawns. This is not the sort of statistic that we should accept easily or happily. There is a solution to this problem: a new approach to home gardening is required. The new garden is based on W. A.\u27s own colourful native plants, which are adapted to mild winters, hot dey summers and poor soils, and are also resistant to many local pests and diseases

The mango in Western Australia

ALTHOUGH normally considered a tropical tree, the mango does well in the sub tropics of Western Australia. The main commercial area in the State is Carnarvon but a few trees grow as far south as Perth

Crossings for channels and drains in the Ord River area

ON farms irrigated by surface methods it is essential to provide crossings over channels and drains. These crossings must be wide and strong enough to take the biggest farm machinery

The Hamel nursery

A LITTLE known, but highly productive use of irrigation water occurs at the Forestry Department Nursery, Hamel. Seedlings of trees and shrubs are raised during the summer for sale the following winter. Sales are made to the farming community and many trees are used by the Forest Department in its reafforestation programmes

Radial Redshift Space Distortions

The radial component of the peculiar velocities of galaxies cause displacements in their positions in redshift space. We study the effect of the peculiar velocities on the linear redshift space two point correlation function. Our analysis takes into account the radial nature of the redshift space distortions and it highlights the limitations of the plane parallel approximation. We consider the problem of determining the value of \beta and the real space two point correlation function from the linear redshift space two point correlation function. The inversion method proposed here takes into account the radial nature of the redshift space distortions and can be applied to magnitude limited redshift surveys that have only partial sky coverage.Comment: 26 pages including 11 figures, to appear in Ap