Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 391 for “"Helena"”.
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Characterisation of ocean island basalt sources : St. Helena
The extrusive and intrusive members of the St. Helena rock suite (SHRS) are formed in an intra-oceanic plate tectonic setting as part of two shield volcanoes. The SHRS vary from picrobasalts to phonofites. The former represent mantle derived melts, whereas the remainder of the suite have undergone …
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The variability of retention in St Helena Bay
The circulation in St Helena Bay and the variability of the retention of the Bay are investigated using seasonal climatologies of the Regional Ocean Modelling System (ROMS). While retention has been studied biologically, the seasonality of the hydrodynamics contributing to the retention have …
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Influences on the hydrology of the Cape Columbine/St. Helena region
… coastal waters, with special reference to St. Helena Bay. The first step in the study involves monitoring the meteorological occurrences which resulted in the prevailing hydrology and thus give a general background to the observed structure. It became necessary to establish two sub-systems in …
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Categories of Mystical Experience in The Voice of the Silence by Helena Petrovna Blavatsky.
The Voice of the Silence (1889), compiled by Helena Petrovna Blavatsky, is widely regarded as one of her most influential works, yet it has been relatively overlooked in academia. This dissertation seeks to fill this gap by identifying, classifying, and establishing the categories of mystical …
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Impactos territoriais da criação do assentamento rural Dona Helena-Cruz do Espírito Santo/PB.
… arising from the creation of the Dona Helena rural settlement, located in Cruz do Espírito Santo (Paraíba), which is located in the mesoregion of Zona da Mata, a region where traditiona lly predominate a monocultivated production of sugarcane and therefore the large estates. Mesoregion …
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Labour, capital and the state in the St. Helena Bay fisheries c.1856 - c.1956
This thesis deals with the history of the St Helena Bay inshore fisheries, 1856-1956. Fishing has long been neglected by social and economic historians and the myths propagated by company and popular writers still hold sway. The thesis challenges these by situating commercial fishing at St Helena …
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Temporal and spatial variability in a copepod community off St Helena Bay in 2000/1
… and species composition were examined at St Helena Bay in 2000/1 in relation to upwelling, phytoplankton and fish. The copepod assemblage was dominated by large species categories in the early period of recruitment (April) and smaller species categories in the late period of recruitment …
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An ethnography of St Helena Bay - A West Coast Town in the age of neoliberalism
… systems as they manifest locally in St Helena Bay. The growing integration of the West Coast has brought rapid change in the form of industrial production, urban development and in-migration. The pressure placed on local resources by these processes has been exacerbated by the …
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Seasonal and spatial variability of pelagic fishes in relation to environmental variability in St Helena Bay
The St Helena Bay Monitoring Line (SHBML) stretches 197 nautical miles off Elands Bay on the west coast of South Africa. It is an extensive long term project on environmental monitoring, running from 2000 till 2012 on an almost monthly basis but currently running on a quarterly basis. It extends …
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Spatial and temporal scales of the coastal currents in the St. Helena Bay - Cape Columbine Region
… a current meter experiment performed in the St Helena Bay - Cape Columbine region during winter 1982. The work, which forms part of the shelf dynamics programme undertaken by the Sea Fisheries Research Institute, attempts to identify the important time and spatial scales within the coastal …
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Helena Araújo, el devenir afuera: de la Colonia al exilio, de la confesión a la auto-ficción
… three chapters, my Ph.D. Dissertation, entitled "Helena Araújo, el devenir afuera: de la Colonia al exilio, de la confesión a la auto-ficción," examines how Araújo′s work is organized around the spatial-temporal discontinuity provoked by the exile of the feminine character. Using Gilles Deleuze′s …
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Are distinct particle spectra an indication of the state of the phytoplankton community in St Helena Bay?
… samples collected on regular cruises on the St Helena Bay Monitoring Line (SHBML) off Elands Bay on the west coast of South Africa had been analysed with the Coulter Counter and formed the basis of this study. Chlorophyll a content of phytoplankton samples was also measured on monthly cruises …
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Spatial and temporal distribution of a marine microbial parasite, Syndiniales MALV I and II, within St Helena Bay
… a stratified period in April 2019 within St Helena Bay. Microscopy observations revealed a distinct difference in their infection dynamics between an active upwelling season (austral spring and summer) and a stratified period (austral autumn and winter), with distinctly different …
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Belonging to the West Coast : an ethnography of St Helena Bay in the context of marine resource scarcity
… systems as they manifest locally in St Helena Bay. The growing integration of the West Coast has brought rapid change in the form of industrial production, urban development and in-migration. The pressure placed on local resources by these processes has been exacerbated by the …
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The role of women in the small-scale fishery sector in South Africa: the case of St Helena Bay
… contributions of women in all aspects of the St Helena Bay small-scale fisheries sector, moving beyond the conventional view of women's involvement as confined to pre- and post-harvest activities. Employing a gendered lens and grounded in qualitative fieldwork, the study adopted a case study …
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Multi-sensor mooring development and its use to characterise physical processes relevant to harmful algal bloom dynamics in the St Helena Bay area, South Africa
Harmful algal blooms (HABs), typically attributed to dinoflagellate species, occur along the west coast of South Africa, particularly during the latter part of the upwelling season. As part of the Benguela Current Large Marine Ecosystem (BCLME) programme, a buoy has been developed locally for …
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A comparative study of nitrogen uptake and nitrification rates in sub-tropical, polar and upwelling waters
… presents such data for the Southern Ocean and St-Helena Bay, located in the Southern Benguela upwelling system. Using 15N tracers, Nitrogen uptake and regeneration rates were measured in the Southern Ocean (during a winter cruise in July 2012 and a summer cruise in February-March 2013) and …
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