In several experiments, masked repetition priming in the lexical decision task was greater when prime validity, defined as the proportion of repetition versus unrelated primes, was high (.8 vs. .2), even though primes were displayed for only 45 or 60 ms. A similar effect was also found with masked semantic primes. Prime validity effects are not predicted on a lexical entry-opening account of masked priming nor are they consistent with the use of prime validity effects as a marker for the consciously controlled use of primes. Instead, it is argued that episodic traces are formed even for masked primes, are available as a resource that can aid word identification, and are generally more likely to be recruited when their validity is high. However, prime validity effects did not obtain when targets varied markedly from trial to trial in how easy they were to process. Here, it appears that trial-to-trial discrepancies made the lexical decision task more difficult, causing an increase in prime recruitment, at least when prime validity was low. Consistent with this claim, prime validity effects emerged when these trial-to-trial discrepancies were minimized. / Graduate

Abstract The polycystic ovary syndrome, described first as the association of bilateral polycystic ovaries and amenorrhoea, oligomenorrhoea, hirsutism and obesity, was later shown to be a complex metabolic syndrome. The first purpose of this study was to investigate the occurrence of hyperinsulinaemia and the severity of insulin resistance and glucose tolerance disorders in polycystic ovary syndrome by means of the oral glucose tolerance test and the euglycaemic hyperinsulinaemic clamp. The next goal was to investigate whether women with polycystic ovary syndrome would benefit from insulin-sensitising drugs, and in particular to compare the effects of metformin and a contraceptive pill containing ethinyl oestradiol and cyproterone acetate. Altogether, 81 women with polycystic ovary syndrome and 34 healthy control subjects were involved in the study. Marked impairment of insulin sensitivity in obese subjects with polycystic ovary syndrome, including a decrease of both cellular oxidative and non-oxidative utilisation of glucose, and a slight non-significant decrease of insulin sensitivity in non-obese subjects was observed. Both non-obese and obese subjects with polycystic ovary syndrome exhibited increased abdominal obesity compared with the controls, confirming the fact that obesity, in particular abdominal obesity, is an important contributor in the development of insulin resistance in this syndrome. Metformin alleviated hyperandrogenism by essentially decreasing ovarian, but not adrenal androgen secretion. The improvement of hyperandrogenism and ovarian function seemed to be mediated by the improvement of hyperinsulinaemia, which resulted itself from subtle improvements in both hepatic insulin extraction and insulin sensitivity. Metformin decreased abdominal obesity and the release of free fatty acids from adipose tissue, and improved ovarian cyclicity and fertility. The transient decrease in serum leptin levels observed may have some role in the improvement of ovarian function. The contraceptive pill significantly improved hyperandrogenism and hirsutism, and it slightly affected glucose metabolism. Thus, it could be the treatment of choice in women with hirsutism problems and no fertility hopes. Metformin could be the drug of choice for women with polycystic ovary syndrome who wish to conceive. Because of its beneficial metabolic effects, the value of metformin in reducing the risk of cardiovascular diseases in polycystic ovary syndrome needs to be further studied.

No description available.

No description available.

Approved for public release; distribution is unlimited / A group of lesser used analog control system design techniques, generally termed parameter plane methods, is examined through the use of an IBM compatible microcomputer program developed as part of this thesis. The coefficients of a system's characteristic polynomial are determined by the plant and any added compensators. As these coefficients are varied , so too are the roots of the characteristic equation and therefore the system response in terms of bandwidth, settling time, etc. In the parameter plane method, a designer selects two parameters of a system's compensator(s) . The parameters commonly represent such attributes as a compensator gain, pole, or zero but can be any linear system function. One or more system characteristics dictating desired system performance, such as relative damping or undamped natural frequency, are computer model inputs. The associated parameter values to achieve the input characteristics are output in graphical and/or tabular form. / http://archive.org/details/parameterplanean00kran / Lieutenant Commander, United States Navy

The full text of this thesis/dissertation is not available online. Please <a href="mailto:upetd@up.ac.za">contact us</a> if you need access. Read the abstract in the section 00front of this document. / Dissertation (MA (Sepedi))--University of Pretoria, 2007. / African Languages / unrestricted

Voice training has been influenced by separatist attitudes which have allowed for classes which train the body to be separate from those which train the voice. This study acknowledges that to train an actor in separate compartments and then expect the completeness of human expression in performance, is to train under false pretences. There is a need to address the imbalance of separatism and this is examined within the context of voice training. An holistic approach to voice training forms the basis of the argument, which focuses on the need to re-educate the notion of physicality in voice training. Chapter one proposes an understanding of the notion of physicality by drawing on the attitudes of selected theatre practitioners towards the physical nature of the theatre encounter. The expressive energies of the actor's body are responsible for the physicalisation of a play; for this reason the movement of voice and speech is not only examined as source movement, but also as the movement of an actor's response and communication. Chapter two examines some practices which led to attitudes of separatism in voice training, and introduces prevalent practices which are attempting to involve the energy of the physical experience. Chapter three proposes that the Alexander technique be used as the foundation for an awareness of individual physicality. Where chapter one examines the theory of this notion, chapter three proposes an experiential understanding of the same. The Alexander technique is a training in effective body use and it's principles are fundamental to an awareness of body use and functioning. It is argued that these principles should underlie a re-education of physicality. The final chapter of the thesis argues for physicality in South African voice training programmes which would complement the physicality of contemporary theatre forms. It is hoped that this study will provide further incentive for the continued review and adjustment of drama training in South Africa.

[From Introduction]. Prior to 1800 advances made in painting could often be accredited to the advances made in paint technology. Since the beginning of the last century however, paint technology has stabilised, moved into the background and allowed the artist to create with the medium rather than be dictated to by it. This stabilising of art technology has also generated a lack of interest in technique, leading in turn to a number of painting techniques being lost. In some ways we know less today of the oil medium and its correct use than was known to Jan and Hubert Van Eyck and their followers. However, if this lack of concern with technique has produced a large number of valid artistic statements which are unlikely to survive physically, it also means that the hoardes of painters who painted technically perfect paintings with no valid art statement have dwindled as well.

No abstract available. Copyright / Dissertation (MMus)--University of Pretoria, 2010. / Music / unrestricted

Cette thèse porte sur les rapports qu’a la pratique du yoga contemporain avec le néolibéralisme. Celui-ci est présenté non pas tant comme une doctrine économique n’intervenant que dans la sphère dont elle ressortit, mais davantage comme une forme de discours moral qui s’articule à une vaste étendue de pratiques et de représentations sociales. L’enquête ethnographique qui a été menée sur le yoga nous conduit également à voir dans cette pratique la formation d’une morale mobilisant un ensemble de discours, de valeurs et de techniques afin de s’ériger en guide de conduite. La constitution d’une morale du yoga est alors mise en rapport avec ce que nous appelons la morale du néolibéralisme qui enjoint les individus à faire de leur autonomie, de leur réalisation personnelle ou encore de la gestion d’eux-mêmes des principes à la fois moraux et économiques. Celui qui s’engage dans la pratique du yoga peut ainsi, tout en poursuivant des objectifs de développement personnel ou spirituel, contribuer à son propre façonnement d’homo œconomicus.