The Southern Ocean is an important region for the sequestration of heat, carbon dioxide and other tracers. The Southern Ocean circulation is typically described in a circumpolarly averaged sense as a Meridional Overturning Circulation (MOC), but the detailed 3-D pathways that make up this circulation remain poorly understood. We use Lagrangian particle trajectories, obtained from eddy permitting numerical models, to map out and quantify different aspects of the 3-D circulation. We first introduce various definitions used to quantify efficient export from the Antarctic Circumpolar Current (ACC) to the subtropical gyres. Using these definitions, we show that the permanent northward export varies by water mass and occurs in localised regions; with 11 key pathways identified. We then examine the dynamics setting the location and efficiency of the identified pathways, which includes the investigation of the role of diapycnal mixing and the impact of short and long time variability in the flow. Although we show that the flow of particles in the 3-D model is predominantly isopycnal, we find that particles that are forced to remain on isopycnals lead to approx. 60% lower export (mainly via three pathways) than identical releases where the diapycnal component of advection is included. Enhanced upward mixing near rough topography, and downward mixing in the southeast Pacific, were shown to be mostly responsible for the export. In addition, we show that most of the export pathways are mainly influenced by timescales from 90 days to 20 years, which suggests that mesoscale eddies are not the leading-order importance in the northward export from the ACC to the subtropical gyres. However, we also find that mesoscale eddies and the mean-ACC flow play a significant role in setting the export from the ACC in some pathways. These results highlight the role of temporal variability and vertical transport in enhancing the northward flow from the ACC by allowing transport across barotropic streamlines and onto more efficiently exporting isopycnals. In addition, the asymmetrical response of the studied quantities emphasises the importance of the three dimensions in understanding the dynamics driving the overturning circulation. We also demonstrated that the annually repeating velocity fields, which are commonly used for trajectory calculations, increase the diapycnal transport of particles and as a consequence, increase the overall 20-year northward export from the ACC by approx. 10%. In the study of the meridional overturning circulation, we diagnose the geographical distribution of the streamwise averaged diffusivity calculated from meridional displacements of the Lagrangian particles. We examine streamwise averaging using both latitude and equivalent latitude and argue that the latter gives a more useful measure. Reconciling tracer and particle horizontal diffusivities, we show that in the ACC, the average diffusivity peaks between 1500m and 2500m with an average value of 1500 m$^{2}$/s and that it is highest near the topographic features. We compare the exact diffusivity and its approximation to show that an assumption of time homogeneity does not hold and therefore that standard expressions for diffusivity that assume time homogeneity are of limited usefulness. Finally, we use the calculated trajectories to provide a streamwise averaged 2-D advection-diffusion model of the Southern Ocean MOC and then examine the extent to which this 2-D model can capture the overall effect of the actual 3-D transport.

Despite the long time since the introduction and spread of pine plantations in southern hemisphere countries there has been no study of the suitability of this exotic and novel type of vegetation on the native avifauna. This thesis aims to add understanding of this habitat replacement and its effects on the forest bird community. This research included a series of studies to assess the quality of mature pine plantations for the forest avifauna in comparison to what is in native forests. The first two studies determine the effects on the forest bird community of the fragmentation and replacement of native forest in a gradient of substitution. The results showed a direct relationship between level of substitution and loss of functional diversity, and that fragmentation predicts the bird assemblage in pine stands. The next two studies used data from an intensive ringing season to assess differences in the condition of populations inhabiting each habitat. Birds, in general, were found in better condition in native fragments than in pine plantations. Moreover, a despotic distribution was determined for a migrant species and a gradient in habitat quality was found in relation to proximity to native forest. The next two studies used information from a nest-box survey set in a gradient of sites with substitution of native forest. The results showed that the type of forest cover and their proportion in the landscape may affect the breeding performance of some species. Finally, in the last study I evaluated the foraging niche of bird species in each habitat. Compared with native forest, niche breath reduced while the niche overlap increased in pine plantations for most species. The results suggest that pine plantations are poor quality habitat for the bird community and that the substitution of native forests increases selective pressure.

Debates concerning how churches in the developing world are best resourced in terms of their funding base and the implications of this for other aspects of church life have been conducted for over 150 years. The solutions offered have ranged from the Three-Self theory, with its advocacy of local self-support, to wholesale financial support from abroad, and in between a combination of those methods in a variety of configurations. This thesis focuses on the recent experiences of evangelical Christians in a southern Mozambican context, paying particular attention to three case studies: the Igreja Evangelica Arca da Salvação; the Ministério Centro de Louvor; and the Igreja Reformada em Moçambique. It asks why so many churches in Mozambique are seemingly locked into a dynamic of economic dependency on donors from abroad, but also why it is that in that shared and impoverished national context some churches are attempting, with some success, to resource their own activities. Using accounts and reflections obtained first-hand from Mozambican Christians, the thesis suggests that, alongside important factors such as the historical circumstances surrounding the emergence of each church group or denomination, the vision and agency of leaders in each local congregation are also fundamental to the resourcefulness of the members and the developmental trajectory of the church. In the context of self-governance, the role of such leadership is highlighted as crucial to the emergence of both self-funding and self-propagation. As well as contributing to the debate concerning the resourcing of churches in the developing world, this thesis addresses social theory that is concerned with how and why individuals invest their available resources in the religious communities of which they are part. It also contributes to the study of independent churches in southern Africa, concerning their potency for independent economic development. Finally, this thesis argues that, for the purposes of avoiding the cultivation of unhealthy dependency in national churches, international mission societies and para-church organizations in developed nations would do well to analyse the dynamics of which they are part. Where partnerships consist largely of sponsorship, it is argued, the risk of ongoing unhealthy dependency is high.

A inserção internacional de Moçambique é um processo que ocorreu em fases, tendo se iniciado com os esforços empreendidos na década de 1960 pelo Dr. Eduardo Chivambo Mondlane, Primeiro Presidente da Frente de Libertação de Moçambique (FRELIMO). Visando criar o isolamento internacional do regime colonial Português e obter o apoio necessário para a causa da independência de Moçambique, Mondlane estabeleceu contatos com governos de vários Estados do mundo incluindo países ocidentais, países progressistas africanos e países socialistas, projetando, deste modo, a imagem de Moçambique no mundo. Iniciada com as decisões tomadas no Segundo Congresso da FRELIMO realizado em 1968, a política externa de Moçambique tinha em vista “criar mais amigos e poucos inimigos”, num contexto de bipolaridade ideológica que caracterizava a guerra-fria. O novo contexto internacional emergente no período após o fim da guerra-fria viria a originar uma redefiniçao desta política que passou a ser definida como de “criar mais amigos e mais parceiras”. A nível da região da África Austral a FRELIMO considerou sempre que a independência de Moçambique só seria completa com a libertação de todos os países da região que ainda se encontravam sob a dominação de regimes coloniais e minoritários tendo dado o seu apoio incondicional à luta de libertação do Zimbábue, África do Sul e Namíbia, para além do seu grande empenho no processo de cooperação e integração regional. É neste contexto que se pode enquadrar esta tese cujo tema é “a política externa de Moçambique e sua inserção na região da África Austral” a qual procura, através de uma vasta revisão bibliográfica, analisar os contornos que estiveram à volta da afirmação de Moçambique como Estado reconhecido no concerto das nações tanto a nível regional como internacional. / The international insertion of Mozambique is a process that took place in phases, starting with the efforts made in the 1960s by Dr. Eduardo Chivambo Mondlane, First President of the Liberation Front of Mozambique (FRELIMO). In order to create the international isolation of the Portuguese colonial regime and obtain the necessary support for the cause of Mozambique's independence, Mondlane established contacts with governments in several states of the world including Western countries, progressive African countries and socialist countries, thus projecting the image of Mozambique in the world. Initiated by the decisions taken at the Second FRELIMO’s Congress held in 1968, Mozambique's foreign policy aimed to "create more friends and few enemies" in a context of ideological bipolarity that characterized the Cold War. The new emerging international context in the period after the end of the Cold War would lead to a redefinition of this policy, which was defined as "creating more friends and more partners". At the level of the southern African region FRELIMO always considered that Mozambique's independence would only be complete with the liberation of all the countries of the region that were still under the domination of colonial and minority regimes and gave its unconditional support to the liberation struggle in Zimbabwe, South Africa and Namibia, in addition to its strong commitment to regional cooperation and integration. It is in this context that one can frame this thesis whose theme is "the foreign policy of Mozambique and its insertion in the region of Southern Africa" which seeks, through a vast bibliographical review, to analyze the contours that were around the affirmation of Mozambique as State recognized in the concert of nations at both regional and international levels.

>Magister Scientiae - MSc / The reservoir quality of the Orange Basin, offshore South Africa is known to be immensely impaired by the presence of authigenic minerals. The collective effects of burial, bioturbation, compaction and chemical reactions between rocks, fluid and organic matter conclusively determined the quality of reservoirs within the Orange basin. The aim of this study was to provide information on the quality of reservoirs within the Orange Basin. Data used to conduct this study include wireline logs (LAS format), well completion reports and core samples from potential reservoir zones of wells K-A2, K-A3 and K-E1. To accomplish the aim, petrophysical parameters were calculated, such as porosity, permeability and water saturation. Besides, depositional environments were identified using gamma ray log and core logging techniques. Thirdly, petrographic studies were supporting techniques in understanding how various minerals and diagenetic processes play a role in reservoir characterisation. Geophysical wireline logs (Gamma ray, Resistivity, Bulk density and Caliper) allowed for the estimation of the three main reservoir properties; namely: porosity, water saturation and permeability. The porosity calculations revealed a range of 3-18% for well K-A2, 2%-13% for well K-A3 and 3%-16% for well K-E1. The permeability’s ranged from 0.08-0.1 mD and 0.001-1.30 mD for K-A3 and K-E1, respectively. Thus, the findings of the petrophysical evaluation of the wells in Interactive Petrophysics indicated that the reservoir intervals of wells K-A2, K-A3 and K-E1 are of poor to good quality. Based on the core analyses, the depositional environment is mostly shallow marine, specifically tide dominated for well K-A2, sandstone channel for well K-A3 and intertidal environment for well K-E1. These environments were confirmed by XRD, revealing glauconite as the prominent mineral.

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Since its conception in folklore and superstition, the vampire has had an innate ability to reflect the environment of the culture that creates it. Each manifestation of this being is entirely unique to the culture in which it is born. The vampire of the American South is no exception to this idea. As a region with a particularly tumultuous history, the South has been molded by many cultural influences. Religion, sexuality, and race are some of the most notable factors to have impacted the area. Many Southern authors writing vampire fiction explore the fears, stereotypes, and prejudices of the culture with the vampire characters as a means to represent and critique Southern identity. Vampires in Anne Rice’s Interview with the Vampire, Poppy Z. Brite’s Lost Souls, Scott Nicholson’s They Hunger, Alan Ball’s True Blood, and Patrick Lussier’s Dracula 2000 all reveal something about the culture of the South.

The myth and image of Southern Appalachia spun by local color writers of the early nineteenth century and, later, by local elites in privileged positions of power have long cast the historiography of the region in tones of Caucasian lineage and remediation. The production of culture, contribution to community, and service to church and, family long considered to be the domain of women has predominantly been viewed from the privilege of a white perspective. Prescriptive definitions of a monochromatic culture in the Uplands of Southern Appalachia has written out the cultural contribution of diverse ethnicities who continue to call the region home. The purpose of this study is to illuminate the ways in which women of color and diversity contribute to the production of culture through service to their communities, volunteer outreach, and service in the church and, as models of core Appalachian values for their families.

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No description available.