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Search Results: 1 - 10 of 299221 matches for " J Murray "
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Torsion in Groups of Integral Triangles  [PDF]
Will Murray
Advances in Pure Mathematics (APM) , 2013, DOI: 10.4236/apm.2013.31015

Let 0γ<π be a fixed pythagorean angle. We study the abelian group Hr of primitive integral triangles (a,b,c) for which the angle opposite side c is γ. Addition in Hr is defined by adding the angles β opposite side b and modding out by π-γ. The only Hr for which the structure is known is Hπ/2, which is free abelian. We prove that for generalγ, Hr has an element of order two iff 2(1-

Classical Dialogue: Allusion and intertextuality in Charl-Pierre Naudé s Against the Light
J Murray
Tydskrif vir letterkunde , 2012,
Abstract: The contemporary Afrikaans poet Charl-Pierre Naudé is one of the most promising voices in South African poetry today. Following two award-winning Afrikaans collections, Naudé s debut collection in English, Against the Light (2007), demonstrates learned intertexual references to classical literature, particularly the Roman poets Horace and Catullus. These Latin poets become competing models for Naudé’s own poetics, either passionate and personal, or political and pastoral. In post-apartheid South Africa, after a period of dramatic social change, ultimately Catullus offers himself as the more compelling poetic model for this South African writer.
‘As ek dáárdie nektar wil eet, dan moet ek steke verdra’: Stereotipering en vervreemding in die uitbeelding van lesbiese verhoudings in twee Afrikaanse romans
J Murray
Tydskrif vir letterkunde , 2013,
Abstract: ‘If I want to eat that nectar, I must endure the stings’: Stereotyping and alienation in the representation of lesbian relationships in two Afrikaans novels This article offers a literary analysis of two neglected Afrikaans texts, namely Klipkus (“Stone Kiss”, 1978) by Marlise Joubert and Requiem op ys (“Requiem on Ice”, 1992) by Emma Huismans in order to explore how stereotypical understandings of lesbian sexuality structure the experiences of lesbian characters. Even as the article exposes common homophobic stereotypes, it emerges that the lesbian characters’ experiences are complex and multi-faceted. The exposure to stereotypes results in a profound sense of alienation, which the characters attempt to overcome by undertaking journeys. As they struggle to deal with pain and alienation, the article demonstrates the joy that they manage to find in their relationships with one another. This joy turns out to be fleeting and compromised by social homophobic pressures. By means of a close reading of the representation of these lesbian relationships, the article both reveals and challenges common stereotypes about lesbian relationships.
Remembering the short stories of Yvonne Vera: A postcolonial and feminist reading of Why Don’t You Carve Other Animals?
J Murray
Tydskrif vir letterkunde , 2011,
Abstract: The Zimbabwean author Yvonne Vera is one of the most important writers to emerge from the African continent over the last two decades. Although she has received widespread critical acclaim as well as academic scrutiny, analyses of her work have mostly focused on her novels. This article attempts to redress this scholarly imbalance by offering a close textual analysis of Why Don’t You Carve Other Animals? through a critical lens of postcolonial and feminist theory. In these stories Vera articulates the internal thoughts of her characters in order to explore the way that oppressed people negotiate the fact of their oppression. It is particularly the female characters’ reflections that reveal the complexity of the position occupied by colonised women and the sophistication of their attempts to address the layered marginalisation to which they are subjected. Vera shows that, for them, an unproblematic participation in the nationalist movement for liberating Zimbabwe from colonial oppression is simply not an option. The article explores the specifically gendered expectations and obstacles that shape the female characters’ struggles in the Zimbabwean context.
J. Murray
Akroterion , 2012, DOI: 10.7445/54-0-27
Abstract: A traveller to the battlefields of the Anglo-Zulu War in Northern KwaZulu-Natal will come across, at Isandlwana, a memorial to the Natal Carbineers, an infantry regiment that served on the side of the British during the war.
Modeling Fiber Composites during the Cure Process for Piezoelectric Actuation  [PDF]
Darryl V. Murray, Oliver J. Myers
World Journal of Mechanics (WJM) , 2013, DOI: 10.4236/wjm.2013.31002

Analytical, numerical, and experimental modeling methods are presented to predict deformation after the cure process of thin unsymmetric laminates for piezoelectric actuation. During fabrication, laminates deform to several post-cure room temperature shapes. Thin cross-ply laminates deform to a circular cylindrical post-cure shape while thicker laminates deform to a saddle shape. Post-cure shapes are dependent on ply orientation, thickness, and material properties. Because, CLT alone does not always predict the correct post-cure room temperature shape of the thin composite laminates, an extension of CLT with the Rayleigh-Ritz technique and potential energies are used to better predict these shapes. Finite element models are used to predict the post-cure room temperature shapes. Thin composite laminates are modeled coupling heat transfer and structural mechanics, which are necessary for modeling the cure process. Modeling the fabrication process captured important data such as residual stresses from the cure process, room temperature shapes, and bi-stability of the composite laminates. To validate these analytical and numerical results, experiments were con- ducted using macro-fiber composite (MFC) patches for morphing the laminates. The experimental piezoelectric morph- ing results relate well to analytical and numerical results.

Metabolic adaptation of skeletal muscle to high altitude hypoxia: how new technologies could resolve the controversies
Andrew J Murray
Genome Medicine , 2009, DOI: 10.1186/gm117
Abstract: In oxidative tissues of the body, production of cellular energy, in the form of adenosine triphosphate (ATP), occurs primarily via the process of oxidative phosphorylation at the inner mitochondrial membrane. In order to sustain normal cellular function, therefore, the mitochondria require a constant supply of fuels and oxygen (Figure 1). In diseases where oxygen delivery to the peripheral tissues is impaired, through hypoxemia (for example, chronic obstructive pulmonary disease (COPD), cystic fibrosis), decreased oxygen carriage capacity (for example, anaemia), or decreased convective transport (for example, shock, heart failure), or in healthy individuals at altitude, a process of adaptation must occur to maintain cellular energy homeostasis. A compromise in cellular energetics can lead to more rapid fatigue in exercising skeletal muscle, since both crossbridge cycling at the sarcomere during contraction and calcium reuptake to the sarcoplasmic reticulum during relaxation are heavily dependent on ATP hydrolysis. Moreover, in cardiac muscle, energetic impairment has been associated with the pathogenesis of hypertrophic cardiomyopathy and sudden cardiac death [1].The study of how healthy human subjects acclimatize to high altitude is a useful model in which to investigate hypoxic adaptation in the absence of the many confounding factors associated with hypoxic disease states and therapeutic interventions [2]. Indeed, many common features have been noted between COPD in particular and altitude exposure, including similar patterns of muscle wasting, weight loss, and altered cellular metabolism [3,4]. Individual variability in the process of hypoxic adaptation and performance has been identified in healthy individuals at altitude [5], and similar mechanisms may therefore underlie the observed variations in disease progression and outcome in patients where cellular hypoxia is an important feature, in particular severe respiratory and cardiac disease and critical illness
Care and the self: biotechnology, reproduction, and the good life
Stuart J Murray
Philosophy, Ethics, and Humanities in Medicine , 2007, DOI: 10.1186/1747-5341-2-6
Abstract: I argue for a different approach to bioethics, and work towards a new way to conceive of ethical relations in healthcare – one that does not presume a sovereign subject as the basis of dignity, personhood or democracy. Instead, I am critical of the narrow instantiations of reason, autonomy, and freedom, which, more recently, have been co-opted by a troubling neo-liberal politics of the self. Thus, I am critical of current trends in medical ethics, often running in tandem with corporate-governmental models of efficiency, accountability, and so-called evidence-based best practices. As an example of such market-driven conceptions of subjectivity, I discuss the paradigm of "self-care." Self-care shores up the traditional view of the self as a free agent. In this sense, self-care is looked upon favourably by mainstream bioethics in its focus on autonomy, while healthcare policy endorses this model for ideological and economic reasons. To contrast this, I propose a different model of care together with a different model of selfhood. Here I develop and apply Foucault's late work on the "care of the self." In this understanding of "care," I suggest that we might work towards an ethical self that is more commensurable both with recent theoretical views on subjectivity and – more pressingly – with the challenges of emergent biotechnologies. I end this paper with a discussion on ethical parenthood, which offers a practical reading of the "care of the self" in relation to new reproductive technologies (NRTs)."The unexamined life is not worth living" [1].While this essay focuses specifically on our changing sense of self in relation to recent advances in biomedical technologies, in the background looms a larger, more philosophical, question concerning life – bios: What lives are worth living, what lives worth preserving and reproducing? Today, in a culture saturated by medical discourses of all kinds, it is difficult to read Plato's remark on the value of the "unexamined life" a
Psychoanalysis, Symbolization, and McLuhan: Reading Conrad's "Heart of Darkness"
Stuart J. Murray
MediaTropes , 2008,
Editorial Introduction: "Media Tropes"
Stuart J. Murray
MediaTropes , 2011,
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