An investigation was undertaken in some detail of three virus strains of insect pests of agricultural importance, viz. a nuclear-polyhedrosis virus of the lucerne caterpillar, Colias electo, and a granulosis virus of the bollworm, Heliothis armigera, both found in South Africa, and a nuclear-polyhedrosis virus of the bollworm, Heliothis zea, isolated in America, with a view to ascertaining a knowledge of some of the fundamental properties and basic biology of these infective agents. On the basis of the information gained the viruses could be differentiated and their broad classification was established. The morphology of the polyhedra, capsules and virus particles observed by light and electron microscopy has been completed and measurements of the viral elements have been made. Some biophysical properties of the virus particles and their inclusion bodies were recorded, i.e. their resistance to chemical and physical treatments and their relative mobility in an electric field under standard conditions. Observations were made on procedures which brought about varying degrees of purification and concentration of the virus particles from putrefying larvae and the most successful of these were found to be reproducible. They involved the purification of the inclusion bodies and their digestion by weak alkali to release the virus particles. Both preparations of the viral elements were further purified by zone electrophoresis in sucrose density gradients. Some information was gathered on the mode of transmission of the infection from insect to insect by contact or cannibalism, from one generation to the next through the eggs, and particularly from one area to another by virus survival in avian faeces. The incidence and rate of the infection in the larvae was increased by environmental changes such as raising the temperature and also to some extent by spraying with a suspension of endospores of Bacillus thuringiensis. Exposure to other stress conditions was not successful in initiating a fatal infection in the insects. Of particular interest, however, was the observation that by injecting a 'foreign' virus a fatal infection was induced by activation of a native occult virus in the larvae of the silkworm, Bornbyx mori. In the context of the possible application of these infective agents to future methods of biological control of economically disastrous pests, these preliminary experiments were not unrewarding.

A thesis submitted to the Faculty of Education in fulfillment of the requirements for the Degree of Master Of Education in the Department of Comparative and Science Education at the University of Zululand, 2018 / In the Manual: Guidelines for capacity building of school governing body members, South Africa (2015:12), “research indicates that most of the newly elected SGB members do not have the necessary capabilities to govern schools at the required level”. This view is corroborated by Pamillis (2005:23)’s assertion that “a common obstacle to democratic functioning of schools governing bodies in South Africa is the lack of capacity among many SGB members who may have not only insufficient knowledge of the legal requirements and rights of SGBs, but also lack the necessary education and skills to manage the school’s finances and business dealings and over above these deficiencies the SGB members may lack adequate support systems from the educational bureaucracy. Arguably, it is in light of these possible deficiencies that the South African Schools Act requires provincial departments of education to provide capacity-building programmes for governing bodies. Thus, as a consequence of this lack of the requisite capabilities, “experiences with decentralisation in education are somewhat mixed and often disappointing” (Azfar et al., 2001:8). This prevailing situation in respect of the lack of requisite governance skills is accounted for by the fact that “in South Africa a form of decentralisation has evolved that is strong in terms of devolution, but weak in terms of managing the disparate and often discriminatory proclivities and tendencies within local sites” (Azfar et al., 2001:8). What transpires from this is that “decentralisation South Africas not necessarily promote allocative efficiency […]” (Azfar et al., 2001:8). Thus, Azfar et al., (2001:8) view in this regard is that “whether decentralisation in fact improves or harms public sector performance appears to depend on formal institutional arrangements, as well as their interaction with social practices which influence the implementation of decentralised governance.” It is against this backdrop, therefore, that van Wyk (2007:137) argues that “in ceding power to the local site, the model in use in South Africa has failed to take account of diversity at the local level.” It is worth noting though that despite the failure cited by van Wyk, decentralisation as a pragmatic governance strategy is not dismissed willy-nilly. This view is corroborated by van Wyk’s (2007:137) argument that “the shift to decentralised school governance and management requires SGB members to develop a wide range of skills and capacity to deal with the complex issues and tasks they are expected to fulfil”. Thus, as a response to this predicament, “teachers often mentioned the necessity of providing appropriate training for school governors, particularly the parent representatives” (Van Wyk, 2007:137). Arguably, “skills deficit among SGB members weaken the effective functioning of SGBs (Van Wyk, 2007:135). The situation under discussion is exacerbated by and large by the fact that “there is a lack of accountability and possible participation problems in the relationship between schools and their governing bodies” (Transparency, 31). In the context of this study it is noted that “although the South African schools Act envisioned a system where schools would be community owned and controlled […]”, it is regrettable that “communities still perceive schools as belonging to government and teachers” (Transparency,31). Thus, in light of the numerous challenges cited above as being contributory factors on the seeming ineffectiveness of decentralisation in the education sector, this study sought to establish how best decentralised governance in schools could be harnessed notwithstanding its attendant constraining factors.

We study hyperbolic structures on the compression body C with genus 2 positive boundary and genus 1 negative boundary. We consider individual hyperbolic structures as well as special regions in the space of all such hyperbolic structures. We use some properties of the boundary hyperbolic structures on C to establish an interesting property of cusp shapes of tunnel number one manifolds. This extends a result of Nimershiem in [26] to the class of tunnel number one manifolds. We also establish convergence results on the geometry of compression bodies. This extends the work of Ito in [13] from the punctured-torus case to the compression body case.

After a mastectomy due to breast cancer, a woman faces a choice about whether to undergo cosmetic reconstruction of her breast(s). In choosing reconstruction, women restore not only their bodies but their socially acceptable selves. In spite of this, most choose not to have reconstructive surgery. Though they are in the majority, not much is known about these women, and about what they do to navigate through life with a body that does not meet expectations of femininity. In this project, I use the case of women who choose not to have reconstruction and not to simulate their missing breast(s) to explore the boundaries of the socially acceptable body. Drawing on interviews with women who did not have reconstruction, examination of depictions of bodies on breast cancer organization web sites, and content analysis of their discussion board postings, I analyze women’s choices not to reconstruct their breasts and place those choices in the context of modern breast cancer culture, which promotes an ideal ‘survivor’ body. I find that these women emphasize concerns about stigma and authenticity and that these concerns are expressed through appearance changes that vary across public and private settings. This research extends our understanding of deviant bodies to understanding the stigma of socially incomprehensible bodies. Further, it makes explicit the assumptions about selfhood that are implied by both current popular perception and sociological work on stigmatization.

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<p>Surrogacy is an emerging phenomenon in Canada, facilitated by societal changes and advances in reproductive technologies. Although surrogacy offers individuals an alternative form of family creation, it is rife with issues of inequality and social injustice based on gender, class, age, sexuality and geographical location. These social justice issues are evident in surrogacy discourses, which have influenced public perception on surrogacy and particularly in relation to women and their role as mothers. This exploratory research will examine these discourses and their representations of women and motherhood through a critical discourse analysis combined with a theoretical framework drawing upon post-structural feminist, social constructionist and social justice theories.</p> <p>Surrogacy discourses have been influenced by patriarchal notions of women and motherhood which evolved during time from focusing on issues of paternity, to women’s rights, to children’s bests interests and finally to family interests. Although the rhetoric surrounding surrogacy has changed, the discourses have always contained oppressive norms concerning women and their bodies. With the rise of global markets and capitalism, these oppressive discourses have taken on global implications for families involved in surrogacy arrangements. These implications beckon the attention of the field of social work on various individual, institutional, structural and global levels through program development, research and advocacy. This research will highlight these implications and will explore recommendations for the social work field in the hopes of providing avenues for social workers to act as agents of social change.</p> / Master of Social Work (MSW)

Osteoporosis is a disease characterized by reduced bone strength leading to an increased fracture risk. Current diagnostic best practice involves measuring the bone mineral density (BMD) of a patient using absorptiometric imaging tools. This measurement is compared to a known value in order to compute fracture risk. This assessment of bone quality is based solely on the BMD, which has been shown to make up only a portion of the explanation of bone strength. The extent of BMD's contribution to bone strength is also extensively debated and widely varying in the scientific literature. This thesis work encompasses a preliminary investigation into factors in addition to density that contribute to bone strength. The geometric and material properties of 21 vertebral functional unit specimens were measured using dual energy absorptiometry (DXA), pQCT (peripheral quantitative computed tomography) and HCT (helical computed tomography) techniques. The strength of the functional units was assessed through mechanical testing under compressive loading conditions. These measurements were amalgamated into multiple linear regression models to characterize vertebral strength in terms of a few key variables. The model developed for failure load had a coefficient of determination of 0.725 and indicated that the volume of the vertebral body as well as the cross-sectional area of the cortical region were significant in the explanation of failure load. A model was also developed for stress at failure which indicated that the vertebral body height and cortex concavity were important parameters. The coefficient of determination for this model was 0.871. The goal of this study was to provide a foundation on which further investigation into the explanation of bone strength could be built. Ultimately, a better understanding of the parameters that affect bone strength will provide a basis for more accurate clinical tools for the diagnosis of osteoporosis. / Thesis / Master of Applied Science (MASc)

Yes / Though many women may be dissatisfied with their bodies, maternity represents a period when the body deviates significantly from Western beauty ideals. However, the developing corpus of literature is contradictory and there is limited knowledge about the longer-term implications of maternity. Further, much of the early postpartum literature focuses on body image, precluding consideration of broader embodiment and other potential issues. Taking account of recent feminist critiques about acknowledging women’s reproductive capacities, the study reported here explores the embodied subjectivity of longer-term bodily changes resulting from pregnancy, childbirth and early mothering. The data explored are from three focus groups. Mothers were recruited from two universities in the North of England, UK. Data were transcribed and analysed thematically and discursively using a feminist and poststructuralist approach, while also taking account of where language was elusive. A number of contradictory, yet interrelated embodied constructions were identified including the aesthetic, the maternal, the suffering/sentient, the strong and the embarrassing body. New insights are offered, in that, not only are the postpartum body and the ‘work of mothering’ inextricably linked, but also that maternal embodied identities are in continuous process across the life course and may have implications for health and well-being.