reported resistance values of 2,8 to 3,2 MPa for tillage pans in A long term trial to study the sustainability of a vertisol under continuous spgarcane monocropping was commenced in 1939 at the Experiment Station of the South African Sugar Association. The design of the trial consists of four replications of two main plots, each split into four sub-plots. The treatments comprise various combina...

A stack of n pancakes can be rearranged in all n! ways by a sequence of n!−1 flips, and a stack of n ‘burnt’ pancakes can be rearranged in all 2nn! ways by a sequence of 2nn!−1 flips. In both cases, a computer program can efficiently generate suitable solutions. We approach these tasks instead from a human perspective. How can we determine the next flip directly from the current stack? How can ...

The Fynbos Biome in the Core Cape Subregion of South Africa is prone to recurrent fires that can clear vast areas of vegetation. Between periods of fire, ophiostomatoid fungi colonize the fruiting structures of serotinous Protea species through arthropod-mediated dispersal. Using microsatellite markers, this study considered the process whereby a Protea-associated ophiostomatoid fungus, Knoxdav...

Background: The effect of corticosteroid therapy on corneal wound healing is controversial. The objective of this study was to evaluate the effects of combination therapy with dexametha-sone and acetylcysteine at different times and durations on experimentally-induced corneal wounds and haze in rabbits. Methods: Eighteen adult New Zealand white rabbits were divided into three groups of ...

With the support of new technologies such as of remote sensing, today’s societies have been able to map and analyse wildland fires at large observational scales. With regards to burnt area mapping in particular, two of the most widely used operational products are offered today by the United States National Aeronautics and Space Administration (NASA) and the European Forest Fires Information Sy...

................................................................................................3 ACKNOWLEDGEMENTS .......................................................4 LIST OF ORIGINAL ARTICLES ................................................5 TABLE OF CONTENTS ..........................................................6 ABBREVIATIONS ............................................................

Objectives The current study examined the extent to which symptom improvement and full return to work occurs among clinically burnt-out employees and what the influence of concurring sleep problems is with respect to health recovery. Methods Fifty-nine burnt-out employees on extended sick leave assessed their symptoms for 2 weeks using an electronic diary. After 6 months, the measurements were ...

A large amount of heroin street doses are seized and examined for drug content by the Israel police. These are generally wrapped in heat-sealed plastic. Occasionally it is possible to visualize latent fingerprints on the plastic wrap itself, but the small size of the plastic item and the sealing process makes the success rate very low. In this study, the possibility of extracting and profiling ...