103,737 research outputs found
Pieter Gysbert Steyn
No full textleyds-519.jpg created from original photograph in the WJ Leyds Collection held in the Manuscripts Section of the Stellenbosch Library and Information Service.Photograph depicting Pieter G. Steyn
A piezoelectric microvalve for compact high frequency high differential pressure micropumping systems
No full textA piezoelectrically driven hydraulic amplification microvalve for use in compact high-performance hydraulic pumping systems was designed, fabricated, and experimentally characterized. High-frequency, high-force actuation capabilities were enabled through the incorporation of bulk piezoelectric material elements beneath a micromachined annular tethered-piston structure. Large valve stroke at the microscale was achieved with an hydraulic amplification mechanism that amplified (40/spl times/-50/spl times/) the limited stroke of the piezoelectric material into a significantly larger motion of a micromachined valve membrane with attached valve cap. These design features enabled the valve to meet simultaneously a set of high frequency (/spl ges/1 kHz), high pressure(/spl ges/300 kPa), and large stroke (20-30 /spl mu/m) requirements not previously satisfied by other hydraulic flow regulation microvalves. This paper details the design, modeling, fabrication, assembly, and experimental characterization of this valve device. Fabrication challenges are detailed
Hypertension in pregnancy : round-table discussion: part 1: cardiovascular profile
No full textAuthors: Brink, A.; Akande, W.; Moodley, J.; Hague, W.; Hall, D.; Steyn, W.; Dekker, G.; Odendaal, H
Whose story is it anyway? The ethics of narration and the narration of ethics in Summertime and Die Sneeuslaper
No full textIncludes bibliographical references.This dissertation analyses and compares the narrative strategies in J.M. Coetzee’s Summertime and Marlene van Niekerk’s Die sneeuslaper and considers the implications of these strategies for the authors’ exploration of the ethics of writing. Much has been written about the literary oeuvres of both Coetzee and Van Niekerk, including studies of the translations of Van Niekerk’s Afrikaans novels into English. There are few “interlingual” comparative studies of contemporary works in Afrikaans and English, however, and certainly none to my knowledge which compares the work of Coetzee and Van Niekerk. My contribution to the conversation about Coetzee’s and Van Niekerk’s work, but also to an increasingly multilingual and interconnected South African literary criticism, will be a comparison of one recent work by each of these two authors, written in English and Afrikaans respectively. I draw on the theories of Bakhtin, Barthes and Levinas to consider the ethical dimension of texts in which “double-voicedness”, a questioning not only of existence, but of the self is fore grounded in the content and narrative structure; where there is a shift in focus from the author to the reader (“the birth of the reader”) and “utterances” are made with the response of “the other” in mind
The development and evaluation of a smoking cessation programme for disadvantaged pregnant women in South Africa
No full textStudies of smoking during pregnancy in South Africa have found exceptionally high smoking rates among disadvantaged women of mixed ethnic descent (46%) (Steyn et al., 1997; Petersen et al., 2009a). As a consequence, these women are at high risk of smoking-related pregnancy complications and poor birth outcomes. It has long been recommended that a smoking cessation intervention be developed specifically for this high risk group. There is strong evidence that best practice smoking cessation interventions for pregnant women can be effective in increasing quit rates, as well as in reducing the incidence of premature birth and low birth weight (Lumley et al., 2009). However, these interventions have only been studied in developed countries and it was unknown whether such programmes could be successfully applied to a South African setting. From 2002, the Medical Research Council of SA undertook a programme of research for the purposes of developing and evaluating a smoking cessation intervention, specifically for disadvantaged pregnant women attending public-sector, antenatal clinics in Cape Town. This thesis reports on several aspects of this research
Air pollution: How we treat the atmosphere like a sewer
No full textItem consists of a digitized copy of a video recording of a Vancouver Institute lecture given by Douw Steyn on March 29, 2008. Original video recording available in the University Archives (UBC VT 1692).Science, Faculty ofEarth and Ocean Sciences, Department ofUnreviewedFacult
The development of recommendations for the implementation of nutrition therapy for coloured women with a type 2 diabetes attending CHC's in the Cape Metropole
No full textEnkele opmerkings oor Christologiese Skrifinterpretasie as hermeneutiese sleutel van die Nuwe Testamentiese skrywers
No full textSome remarks on the Christological interpretation of Scripture as hermeneutical key of New Testament authors Some remarks are made in the following article regarding the christological use of Scripture by the early Christian writers. It is argued that the origin of this approach was found by the New Testament writers in Christ�s own interpretation of these Scriptures. Acts 8:26-40 is used as an example of how a �different� meaning was given. It is further stated that the early Christian writers could easily bridge the gap to Jesus of Nazareth being the Lord and Messiah with terminology in the LXX which lends itself to this purpose. After indicating personal preferences for and/or accessibility of some of these Scriptures, the article concludes that the early Christian writers continued the tradition that these Scriptures were God�s word and authoritative, but they interpreted them christologically
Reconciliation in the General Epistles?
No full textAlthough the customary technical terms for reconciliation are not to be found frequently and explicitly in the General Epistles, the concept or motif is certainly not absent at all. The following contribution investigates the theological dimensions of this motif by using the striking image of a spiritual house, or temple, of which the believers are seen as bricks being built� into the walls (1 Pet 2:4-10). Reconcilation takes shape on Christ as the cornerstone (1 Peter) with vertical pillars representing a restored relationship between God and humanity (Hebrews). This enables the� horizontal dimension of the building to take shape too. In light of the restored relationship between God and humanity, a restored relationship amongst people ought to become a reality. Certain expectations (James), consequenses (1 Peter), dangers and purposes (2 Peter and Jude) facing Christians who find themselves within a reconciled relationship with God are forming the framework for reconciliation with each other
Being Different Together: case studies on diversity interventions in some South African organisations
No full textThere are few contexts where people are not confronted by differences in the workplace, in organisations and public spaces, and as an aspect of the general body politic. This textbook is intended for students and educators of Human Resource Management, Organisational and Management studies. It is also relevant for diversity practitioners based in South African and international contexts
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