Allusions to the body: Jeremy Wafer's Oval Sculptures.

Student Number : 0312766T - MA dissertation - School of Fine Arts - Faculty of HumanitiesThis dissertation is primarily an investigation into the sculpture of Jeremy Wafer and specifically his oval series, Red Ovals (1995), African Forms (1996), Red Ovals (second series) (1998) and Large White Oval (2004). The aim is to establish how, from a post-structuralist and anthropomorphic position, these non-illusionistic sculptural forms may engage the viewer experientially by evoking the body visually, physically and spatially. Wafer’s reductive articulation of surface, material and form is analysed in terms of notions of secrecy and metaphorical referencing specifically relating to the human form. A ‘sense of disquiet’ is evoked by their ambiguity, and this aspect is confronted by looking at various dichotomies and their transition and hybridisation to form the ‘unifying pattern’ that Wafer’s sculptures present. The role of process, repetition and seriality are researched within this context. The works from my Simulacra exhibition in May 2005 at the Substation on the University of the Witwatersrand Campus are discussed according to the above aspects, as they are relevant to my own sculptures

Portfolios — a strategy for reform in information technology teaching

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Tracing the Similarities, Identifying the Differences: Women and the Employment Contracts Act

The world of trade union organisation has been a male dominated world. Men have headed the Federation of Labour and the Council of Trade Unions, and male secretaries have often represented unions with predominantly female members. The dominance of men was significantly challenged in the 1970s and 1980s by a number of women unionists, especially those representing occupational groups with a large female membership. The predominantly female unions which provided them with an organisational base have not until recently received much attention by researchers. As Janet Sayers has indicated, it is now time that the analysis of these unions "should be a priority in labour relations research" (Sayers, 1993: 219)

Hiding Symbols and Functions: New Metrics and Constructions for Information-Theoretic Security

We present information-theoretic definitions and results for analyzing symmetric-key encryption schemes beyond the perfect secrecy regime, i.e. when perfect secrecy is not attained. We adopt two lines of analysis, one based on lossless source coding, and another akin to rate-distortion theory. We start by presenting a new information-theoretic metric for security, called symbol secrecy, and derive associated fundamental bounds. We then introduce list-source codes (LSCs), which are a general framework for mapping a key length (entropy) to a list size that an eavesdropper has to resolve in order to recover a secret message. We provide explicit constructions of LSCs, and demonstrate that, when the source is uniformly distributed, the highest level of symbol secrecy for a fixed key length can be achieved through a construction based on minimum-distance separable (MDS) codes. Using an analysis related to rate-distortion theory, we then show how symbol secrecy can be used to determine the probability that an eavesdropper correctly reconstructs functions of the original plaintext. We illustrate how these bounds can be applied to characterize security properties of symmetric-key encryption schemes, and, in particular, extend security claims based on symbol secrecy to a functional setting.Comment: Submitted to IEEE Transactions on Information Theor

Lists that are smaller than their parts: A coding approach to tunable secrecy

We present a new information-theoretic definition and associated results, based on list decoding in a source coding setting. We begin by presenting list-source codes, which naturally map a key length (entropy) to list size. We then show that such codes can be analyzed in the context of a novel information-theoretic metric, \epsilon-symbol secrecy, that encompasses both the one-time pad and traditional rate-based asymptotic metrics, but, like most cryptographic constructs, can be applied in non-asymptotic settings. We derive fundamental bounds for \epsilon-symbol secrecy and demonstrate how these bounds can be achieved with MDS codes when the source is uniformly distributed. We discuss applications and implementation issues of our codes.Comment: Allerton 2012, 8 page

Les maths, le coeur et la raison un modèle d'intervention dans une classe de mathématiques au collégial /

Résumé: p. 1Également disponible en version papierTitre de l'écran-titre (visionné le 10 fév. 2010)Bibliogr.: p. 107-11

“Hollow” : weerspieëlings aangaande praktyk, die artefak en die liggaam

This article uses a rhizomatic approach to explore how the artist acquired experiential knowledge and insight through the experience and practice of making the expressive artefact “Hollow” (2011). Sullivan argues, “the experience of the artist is the core element in the creation of new knowledge …” (my emphasis). Practice-led research in the visual arts explores multiple, new and diverse ways of experiencing, understanding and living in the world. The artefact serves as both data and evidence (Niedderer 2004: 3). This article adds to the debate whether the practice itself or the reflection upon it embodies the knowledge artistic action produces by exploring the creation of knowledge in the experience and practice of making an artefact (Pakes 2004). I have structured my reveries and reflections as follows: pre-production, production and postproduction. During the pre-production phase I explore my operating system as leading to the making of the artefact. This phase includes thoughts on the intention of the artefact, the intrinsic and expressive motivation, and some serendipitous happenings. I question how to make tacit internal, emotive, bodily experiences in order to transform the ineffable and invisible into a three-dimensional expressive artefact and how to make this experience academically explicit. During the production phase, I explore reveries about and resulting from the processes and explicate the practice of making. I further explore embodied and material forms of thinking. In the post-production section, I reflect on “shocking realisations” (Bolt 2006), the role of the lived body and knowledge discovered during and after the making of “Hollow”.In hierdie artikel ondersoek ek, met behulp van ‘n risomatiese benadering, hoe ek ervaringskennis en insig verkry het deur die ervaring en die praktyk van die maak van die ekspressiewe artefak “Hollow”. My ondersoek volg op Sullivan se (2010: 192) argument dat “die ervaring van die kunstenaar is die kernelement in die skep van nuwe kennis... “ (my klem). Praktyk-geleide navorsing in die visuele kunste ondersoek veelvuldige, nuwe en diverse maniere van die begrip en leef in die wêreld. Die artefak dien as beide data en bewysstuk (Niedderer 2004: 3). Hierdie artikel dra by tot die debat of die praktyk self of eerder die besinning daaroor die kennis wat deur artistieke aksie produseer is beliggaam, deur die ondersoek van die skepping van kennis deur die ervaring en praktyk van die maak van ‘n artefak (Pakes 2004). Ek het my mymeringe en refleksies as volg gestruktureer: pre-produksie, produksie en postproduksie. Tydens die pre-produksiefase verken ek my bedryfstelsel. Hierdie deel sluit in gedagtes oor die intensie van die artefak, die motivering vir die artefak (beide intrinsiek en ekspressief), asook ‘n paar gelukkige, toevallige gebeurtenisse. Ek ondersoek hoe om interne emosies en fisieke ervarings konkrete vorm te gee, en om sodoende dit wat onuitspreeklik en onsigbaar is in ‘n driedimensionele ekspressiewe artefak te omskep. Ek kyk hier ook na hoe om die ervaring akademies eksplisiet te maak. In die gedeelte oor die produksiefase ondersoek ek my gedagtegang gedurende die vervaardigingsprosesse, en wys hoe my interne gesprek produksie beinvloed het, en deur die prosesse beinvloed is. Ek verduidelik hierdeur die proses, en kyk weer na beliggaamde en materiele denke. In die laaste gedeelte, oor post-produksie, bedink ek sekere “skokkende insigte” (Bolt 2006), die rol van die liggaam en kennis wat ek gedurende die maak van “Hollow” opgedoen het.http://reference.sabinet.co.za/sa_epublication/saja

The Effectiveness of the Modified Expanded Rational Expectations Model to Explore Adult Consumers’ Functional Foods Consumption Behavior

Since knowledge and health consciousness have been claimed to have a great influence on dietary behavior, subjective knowledge and health consciousness constructs were added to the ERE model in order to develop Modified ERE (MERE) model. The objective of this study was to investigate the effectiveness of the MERE model in order to explain adult consumers’ functional foods consumption behavior. A convenience sample of 465 adults from a Southwestern university completed the final online survey questionnaire during April and May, 2010. A series of confirmatory factor analyses and structural equation modeling were conducted. Validity and reliability of the measurement model of MERE were confirmed. Results from structural equation modeling revealed that the MERE is a viable model to explain functional foods intention to consume and actual eating behavior. The two new constructs, subjective knowledge and health consciousness, had significant relationships with other constructs of the ERE. In detail, subjective knowledge was a better predictor than objective knowledge in the functional foods context. Health consciousness was a significant predictor of attitude and intention to consume functional foods but not a significant predictor of behavior. However, health consciousness influenced behavior through attitude and intention