An explicit finite element method for convection-diffusion equations using rational basis functions

AbstractAn explicit Galerkin method is formulated by using rational basis functions. The characteristics of the rational difference scheme are investigated with regard to consistency, stability and numerical convergence of the method. Numerical results are also presented

A Galerkin method using rational basis functions

AbstractRational basis functions were constructed without any poles. These basis functions were applied to the Galerkin method in order to solve a wide class of differential equations

Changing patterns of worker accommodation, Zebediela Citrus Estate, 1926-1953: the dynamics of external restraint and self-discipline

Paper presented at the Wits History Workshop: The Making of Class, 9-14 February, 198

Akademie en politiek 1

The purpose of (his article is to develop a view concerning the relationship between academy and politics, particularly by taking into account the way in which developments in the institutionalised practice of the university are relevant or irrelevant for our understanding of the idea of the university. The specific question which the author addresses is: what are the peculiar characteristics and mutual relevance of the two hum a n activities which we respectively call academy and politics Firstly, he discusses views in temis of which academy and politics are radically separated and in terms of which arguments for the alleged political "neutrality" of the university are developed. Secondly, he identifies three cultural and philosophic developments which, since the advent of modernity, have challenged the viability of such separation. Thirdly, he develops a position which mediates between the extremes of an historical academic elitism and a historisiic ideologising of university and science

Ou wyn in nuwe sakke: werk die ou etiek vir die nuwe geneeskunde?

Old wine in new skins: Does the old ethics work for the new medicine?This article investigates and analyses the shifts that have taken place in the discourse about morality and ethics as they have developed in the history of Western medicine. The author argues that many of the forms of moral reasoning aligned to certain practices of medical care in the past have become inappropriate and obsolete for the challenges of a new, postmodern situation in medical care. He specifically investigates the consciousness of limits which is characteristic of the contemporary discourse on medical ethics, and in this regard analyses three manifestations of these limits, viz. the limits of competence, of compassion and of the rights ofphysicians

Graphology in print advertising : iconic functions

Published ArticleTypography and layout are two powerful graphic tools in print advertising. They are used to arrest the attention of the target market by creating a positive association, a controversy or stimulate some kind of intellectual game. This means that much of the message has already been conveyed by creatively expanding and diversifying the conventional values embedded in certain graphic means and basing the advertisements on prevailing textual norms and our past experiences before the message itself has even been read, by just focusing on the typography used (e.g. compare the text layout and typography of a newspaper or a cell phone SMS). Based on a randomly selected South African dataset, aspects of the graphological options with their functional values will be described

Intake and Qualitative Aspects of Guinea Grass Grazed by Sheep over Three Different Seasons

The objective of this study was to determine the influence of season on intake by sheep as well as certain selected qualitative characteristics of Panicum maximum (cv Gatton) (Guinea grass) at the mature growing stage. The lower DM content of the spring and summer grass (41.6 and 40.2%) did not hamper DOMI (48.1 and 26.7 W0.75/d), respectively. The N concentration of the spring and summer grass was well within the limit required for optimal rumen microbial production (1.8 - 2.0%). The high cell wall components of the winter grass resulted most probably in a significant lower IVDOM value (55.5%). The IVDOM values of the spring and summer grass (65.3 and 62.3%) were on the high side for a sub-tropical grass. The lower N content of the summer and winter grass resulted in subsequent lower rumen NH3-N levels (8.9 and 5.3 mmol/100 mL). The winter rumen NH3-N level could have been marginal in terms of rumen microbial activity. The lower VFA values of the summer and winter grass (13.7 and 12.0 mmol/100 mL), could have resulted from a low carbohydrate content in comparison with the N content of these grasses. The significant lower acetic:propionic acid ratio (4.1) of the spring grass suggested a higher quality than both the summer and winter grass ratios (4.6 and 4.7). The significant higher DOMI of the spring pasture (48.1 g/W0.75/d) suggested a potential growth rate of 200 g + of 30 kg lambs. Both the DOMI values of the summer and winter grass (26.7 and 23.3 g/W0.75/d) should fulfill at least the maintenance requirements of grazing sheep

Guest Editorial: Prevention of childhood injuries

No Abstrac