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.
Results
Showing 1 to 20 of 42 for “"temporal heterogeneity"”.
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Spatial and Temporal Heterogeneity of Malaria Transmission in sub-Saharan Africa
… of malaria. As transmission fell, geographical heterogeneity became more marked. b) I undertook an analysis of data shared from 19 studies conducted between 1996 and 2015 in 7 countries of sub-Saharan Africa to examine whether micro-geographical heterogeneity was generalizable. Hotspots were …
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Climate impact of aviation NOx̳ emissions : radiative forcing, temperature, and temporal heterogeneity
… We then determine the existence of long-term temporal heterogeneity of climate forcing and impact. The global net RF of an aviation NO, emissions inventory is positive from 1991 to 2100 while leading to a global average SAT responses of -0.068 K in 2100. Despite the positive zonal RF in the …
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Spatial and temporal heterogeneity in lotic systems : implications for defining reference conditions for macroinvertebrates
Spatial and temporal heterogeneity of lotic systems was examined by assessing variability in macroinbertebrate assemblages in two geographic regions, the Western Cape and Mpumalanga, in South Africa. Assemblages were assessed using the South African Scoring System (SASS), a rapid bioassessment …
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Unravelling the Spatial and Temporal Heterogeneity of High-Grade Serous Ovarian Cancer Using Imaging-Based Biomarkers
… cancer, characterised by significant spatial and temporal heterogeneity, which has been linked to poor survival outcomes. In this challenging landscape, the quest to characterise heterogeneity through non-invasive image-based biomarkers extracted from routinely collected radiological data is …
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Princess Vlei : what diatoms can tell us about spatial and temporal heterogeneity in an urban wetland
… trends were observed. In summation; spatial heterogeneity in the diatom assemblage of an urban wetland reveal that diatoms are suitable indicators of water quality, even within a small system, due to their niche specificity. The project also shows that Princess Vlei remains a eutrophic and …
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Eco -Epidemiology of Schistosoma Haematobium: Spatial and Temporal Heterogeneity of Infection and Snail Dispersal in Msambweni, Kenya
The occurrence of many diseases such as schistosomiasis could be dramatically reduced if people had adequate access to clean water and sanitation. To improve control of S. haematobium transmission, I propose that control measures targeting snails (mollusciciding and environmental modification) and …
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Spatial and temporal heterogeneity in life history and productivity trends of Atlantic Weakfish (Cynoscion regalis) and implications to fisheries management
… stock assessment scientists largely ignore this heterogeneity in their models. This thesis addresses the effects of spatial and temporal heterogeneity on stock assessment models using Atlantic Weakfish (Cynoscion regalis) as a case study. First, spatial and temporal variation was incorporated …
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Globalization for Scalable Short-term Forecasting of Heterogeneous Loads
… inherently related, overlooking potential spatiotemporal data heterogeneity. Heterogeneity in time series refers to diverse characteristics across different series or within a single series over time, which can bias forecasts and reduce generalizability if unaddressed. Data heterogeneity can be …
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Real-time atomic resolution dynamics of glass surfaces
… (Tg). Atomic scale evidence of spatial and temporal heterogeneity was acquired. After multiple metallic glass surfaces were shown to exhibit these dynamics, it was proposed to be a universal phenomenon on glass surfaces with similar size distribution in terms of their average weighted …
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A Deep Learning Framework for Investigating Spatio-temporal Evolution of Land Use and Land Cover Patterns
… At present, the understanding of the spatio-temporal evolution of LULC patterns is heavily constrained by the lack of efficient and precise methods of mapping and predicting LULC changes, particularly for the areas that have few established data sources. The main aim of the research is to …
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Why do European citizens support populism? A comparative study of demand-side and supply-side explanations
… contribute to explaining the cross-country and temporal heterogeneity in their electoral performances. This thesis focuses on two demand-side factors (i.e., social marginalisation and sociotropic concerns about economy) and two factors of the supply-side (i.e., liberal institutional arrangements …
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Magnitude and spatio-temporal variability of methane emissions from a eutrophic freshwater lake
… through bubbling. However, spatial and temporal heterogeneity in ebullition has complicated efforts to accurately measure such methane emissions. This thesis presents the results from a two-year study of methane biogeochemistry conducted at the eutrophic, stratified, Upper Mystic Lake …
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The Trophic Ecology of Psammechinus miliaris in Scottish Sea Lochs
… proxies was used to quantify the spatial and temporal variations in the trophic interactions of P. miliaris. These studies focused on the urchin gonad and compared differences in the gonadal somatic indices (reflecting nutritional and reproductive state) with the fatty acid biochemistry and …
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Three essays on housing economics
… score (AQS) tests for testing the presence of temporal heterogeneity in spatial parameters in spatial panel data models are considered. The test results reveal that the neighborhood elasticity becomes homogeneous after controlling for both spatial and temporal heterogeneity in the intercepts of …
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Ocean-surface heterogeneity mapping: exploiting hypertemporal datasets in support of seascape ecology research
… and monitoring. However, with increases in the temporal frequency of imagery, a greater diversity of ocean surface features can be studied, modelled, and understood in terms of their development over time. This research examines the interface between oceanography, marine ecology, and remote …
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Linking Environmental Factors To Vector Abundance And Malaria Incidence: A Multi-Model Investigation Of Disease Ecology.
… transmission dynamics are shaped by ecological heterogeneity, vector behavior, and changing environmental conditions. By integrating epidemiological, entomological, environmental, and climate data, this work aimed to strengthen the evidence base for targeted, data-driven malaria control …
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Revisiting patterns and processes of forest cover change in the tropics: a case study from southeast Mexico
… economies but also exemplifies the spatial and temporal heterogeneity of tropical forest systems, which challenges partial models of deforestation and policies designed to reduce it. The research may be focused on a narrow region of the globe, nevertheless, the insights and recommendation …
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Essays on Public Investment and Regional Economic Performance
… the role of institutional quality, spatial heterogeneity, and macroeconomic conditions in shaping its effectiveness. Using different econometric approaches, it analyses both national and EU-wide experiences to assess how the impact of public expenditure varies across territories and over …
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Understanding changes in plant productivity using EVI satellite data in Tswalu Kalahari Reserve
… this study was to characterise the spatial and temporal pattern in plant productivity in the 100 000 hectare Tswalu Kalahari Reserve (TKR) in the semi-arid Northern Cape and relate the observed changes to potential drivers using medium spatial resolution of MODIS Enhanced Vegetation Index (EVI) …
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