A study of change and continuity in the world-views of isiXhosa-speaking school leavers in their quest to succeed in the world of work without abandoning their African identity

Bibliography: leaves 315-319.The people with whom this thesis is concerned have chosen to participate in charge and technological advancement. They are engaged in development. Development, as here understood, requires that individuals contribute to the advance of a technological society while affirming their Africanness, albeit a changing Africanness. The study addresses the basic question "How can African youths, who desire to succeed materially, maintain some sort of integrated sense of self in a working environment dominated by a Western style of operation which potentially undermines their Africanness?" The answer is sought in terms of "mediation" between the conflicting African Traditional and Western Industrial world-views in such a way as to enhance development, while not being inconsistent with economic imperatives. It investigates empirically the content of what is being mediated and the mechanisms of the mediation

Quantitative extraction of Meiofauna: A comparison of two methods

Two methods for the quantitative extraction of meiofauna from natural sandy sediments were investigated and compared: Cobb's decanting and sieving technique and the Oostenbrink elutriator. Both techniques were more efficient with pre-fixed samples than with fresh samples. The results indicated that elutriation is the more reliable method due to its low variability, 7,5% for nematodes and 8,4% for harpacticoids and  mystacocarids compared to 11,2% and 29,0% respectively in the case of decantation. However, with samples containing 3 000 to 5 000 animals per 200 cc, decantation yielded 25% more animals than elutriation

Amniotiese Bande by 'n Baba na Abdominale Swangerskap

A baby, delivered by Caesarean section after a 36-week extra-uterine pregnancy, with deformities due to amniotic bands, is described. The mechanism of amniotic band deformities and the paediatric risks of extra-uterine pregnancy are briefly discussed.S. Afr. Med. J., 48, 1106 (1974

Die invloed van die denkvlak op prestasie in Wiskunde in die junior-sekondêre fase*

’n Belangrike ontwikkeling in die Opvoedkunde is dat daar al hoe meer aandag geskenk word aan die denkvlak van die leerling as ’n faktor wat skolastiese prestasie beinvloed

Amniotiese bande by 'n baba na abdominale swangerskap

A baby, delivered by Caesarean section after a 36-week extra-uterine pregnancy, with deformities due to amniotic bands, is described. The mechanism of amniotic band deformities and the paediatric risks of extra-uterine pregnancy are briefly discussed.S. Afr. Med. J., 48, 1106 (1974)

Can we quantify harm in general practice records? An assessment of precision and power using computer simulation

<b>Background</b> Estimating harm rates for specific patient populations and detecting significant changes in them over time are essential if patient safety in general practice is to be improved. Clinical record review (CRR) is arguably the most suitable method for these purposes, but the optimal values and combinations of its parameters (such as numbers of records and practices) remain unknown. Our aims were to: 1. Determine and quantify CRR parameters; 2. Assess the precision and power of feasible CRR scenarios; and 3. Quantify the minimum requirements for adequate precision and acceptable power.<p></p> <b>Method</b> We explored precision and power of CRR scenarios using Monte Carlo simulation. A range of parameter values were combined in 864 different CRR scenarios, 1000 random data sets were generated for each, and harm rates were estimated and tested for change over time by fitting a generalised linear model with a Poisson response.<p></p> <b>Results</b> CRR scenarios with ≥100 detected harm incidents had harm rate estimates with acceptable precision. Harm reductions of 20% or ≥50% were detected with adequate power by those CRR scenarios with at least 100 and 500 harm incidents respectively. The number of detected harm incidents was dependent on the baseline harm rate multiplied by: the period of time reviewed in each record; number of records reviewed per practice; number of practices who reviewed records; and the number of times each record was reviewed.<p></p> <b>Conclusion</b> We developed a simple formula to calculate the minimum values of CRR parameters required to achieve adequate precision and acceptable power when monitoring harm rates. Our findings have practical implications for health care decision-makers, leaders and researchers aiming to measure and reduce harm at regional or national level

Helioseismic Ring Analysis of CME Source Regions

We apply the ring diagram technique to source regions of halo coronal mass ejections (CMEs) to study changes in acoustic mode parameters before, during, and after the onset of CMEs. We find that CME regions associated with a low value of magnetic flux have line widths smaller than the quiet regions implying a longer life-time for the oscillation modes. We suggest that this criterion may be used to forecast the active regions which may trigger CMEs.Comment: Accepted for publication in J. Astrophys. Astr. Also available at http://www2.nso.edu/staff/sushant/paper.htm

Origins of Sinuous and Braided Channels on Ascraeus Mons, Mars - A Keck Geology Consortium Undergraduate Research Project

Water has clearly played an important part in the geological evolution of Mars. There are many features on Mars that were almost certainly formed by fluvial processes -- for example, the channels Kasei Valles and Ares Vallis in the Chryse Planitia area of Mars are almost certainly fluvial features. On the other hand, there are many channel features that are much more difficult to interpret -- and have been variously attributed to volcanic and fluvial processes. Clearly unraveling the details of the role of water on Mars is extremely important, especially in the context of the search of extinct or extant life. In this project we built on our recent work in determining the origin of one channel on the southwest rift apron of Ascraeus Mons. This project, funded by the Keck Geology Consortium and involving 4 undergraduate geology majors took advantage of the recently available datasets to map and analyze similar features on Ascraeus Mons and some other areas of Mars. A clearer understanding of how these particular channel features formed might lead to the development of better criteria to distinguish how other Martian channel features formed. Ultimately this might provide us with a better understanding of the role of volcanic and fluvial processes in the geological evolution of Mars

Chenin blanc Wine Volatiles and the Intensity of a Guava-like Flavour

A guava-like flavour occurring in some South African Chenin blanc and Colombard dry white wines was investigated. Headspace volatiles of some of these wines, as well as those of fresh guava fruits, were analysed by means of a gas chromatograph equipped with a "sniffer-detector". In contrast to the headspace concentrate of guava fruits, no single fraction with a typical guava flavour was found in the wines analysed. The pattern recognition system "ARTHUR" was therefore used to investigate relationships between the more important wine volatiles and the intensity of a guava-like flavour of a set of wines originating from the same Chenin blanc must. Sensory scores for this flavour were used in both category and continuous property analysis in each case. Category and correlation to property plots were used to elucidate the results. Several promising variables and ratios between variables were singled out for further investigation, notably ethyl butyrate and the ratios ethyl butyrate/ethyl decanoate and ethyl butyrate/ethyl octanoate