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 142 for “"Temporal Trends"”.
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Acute heart failure: Scottish temporal trends in hospitalisation, outcomes and clinical application of natriuretic peptides
… from AHF in recent years. However, these trends have not been universally identified and there has been relatively sparse reporting of trends across key subgroups as well as outcomes data. Timely diagnosis of acute heart failure is essential to improving outcomes and natriuretic peptides …
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Analysis of temporal trends in southern Nevada wastewater pond parameters with an emphasis on ammonia removal
This paper examines physico-chemical and biological properties and processes in four Southern Nevada wastewater pond systems located in Alamo, Beatty, Blue Diamond, and Searchlight. Pond parameters examined include pond dimensions, hydraulic retention time (HRT), alkalinity, pH, chemical oxygen …
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SPATIAL AND TEMPORAL TRENDS IN RANGE-USE BY THE BATHURST CARIBOU DURING A POPULATION DECLINE, 1997-2019
… research goal was to examine broad scale spatial-temporal trends in range-use of the Bathurst herd from 1997-2019, in order to better speculate on how these caribou may be responding to external factors. We conducted a Residence Time movement analysis on animal collar data to determine specific …
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The Hydroclimatology of West Virginia Spatial and Temporal Trends and their Relationship with the North Atlantic Oscillation
… surrounding WV's historical hydroclimatological trends. Understanding West Virginia's climate and streamflow variability is important to inform governmental policy about future problems related to water availability, water withdraws, and pollution loading. To investigate variability related to …
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Temporal trends in stream-fish distributions, and species traits as invasiveness drivers in New River (USA) tributaries
… introduced species are present and of spatiotemporal trends in the distribution of natives and invaders. In Chapter 2 we developed a quantitative framework to identify spreaders and decliners and estimate invasion chronologies based on a historical fish presence data set for upper and middle …
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Earth Observatory-based Assessment of Spatial and Temporal trends in Inundation Extent in the Barotse Wetland,Western Zambia
… dynamics of the wetland. This study investigated trends in inundation extent in the Barotse Wetland in Western Zambia. The study methods included statistical analysis of inundation extent time series generated with the Desert Flood Index from MODIS satellite imagery, in-situ hydrological and …
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Earth Observatory-based Assessment of Spatial and Temporal trends in Inundation Extent in the Barotse Wetland,Western Zambia
… dynamics of the wetland. This study investigated trends in inundation extent in the Barotse Wetland in Western Zambia. The study methods included statistical analysis of inundation extent time series generated with the Desert Flood Index from MODIS satellite imagery, in-situ hydrological and …
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Characterizing spatial and temporal trends in fish community diversity in the inland lakes of Isle Royale, MI, USA
… in the 1920s, 1990s, and 2020s to 1) assess temporal shifts in species richness and composition 2) identify lakes and species experiencing the most change, 3) explore environmental factors driving community structure. I used species-area curves, PERMANOVA, and multivariate dispersion tests to …
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Spatial and Temporal Trends in Greenhouse Gas Fluxes from a Temperate Floodplain along a Stream-Riparian-Upland Gradient
… as floodplains and wetlands vary spatially and temporally in response to primary controls including soil moisture, soil temperature, and available nutrients. In this study, we performed a semimonthly sampling campaign measuring GHG (CO2, CH4, and N2O) fluxes from six locations within a …
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Sessile serrated lesions in focus: Examining temporal trends, patient risk factors, and the role of the endoscopist in lesion detection
… high-efficiency screening centre to identify trends in the endoscopic detection of SSLs. The intent of this work is to better understand the temporal factors influencing SSL detection prevalence, the patient risk factors that are associated with these lesions, and how detection is related to …
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An examination of temporal trends, regional variation, and habitat-type differences in site-level Floristic Quality, and their implications for the use of Floristic Quality Assessment
… among different habitat-types, and their trends over time. I used site-level vegetation data from an Illinois statewide habitat monitoring program (Critical Trends Assessment Program, CTAP) to characterize FQA metric properties across regions and habitat-types. I found that forests had …
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Field and laboratory investigation of ozone-indoor surface reactions: secondary emissions inventory and implications for indoor air quality
… surface reaction probabilities and study their temporal trends"--Abstract, page iv.
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Models and Methods for Random Fields in Spatial Statistics with Computational Efficiency from Markov Properties
… A method for estimating spatially dependent temporal trends is also developed. The method is based on using a space-varying regression model, accounting for spatial dependency in the data, and it is used to analyze temporal trends in vegetation data from the African Sahel in order to find …
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Tracing Ainu and Pre-Ainu Cultural Continuity Through Cladistic Analysis of Faunal Assemblages
… of site components follow geographic rather than temporal trends, showing similarities in animal use across these time periods but differentiated between coastal lowland, inland lowland, and inland upland areas. Statistical analyses confirm the trends found in cladistic analysis. These findings …
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A Study of Student Health Services in Four-Year Post-Secondary Institutions
… in 1989 in order to allow the evaluation of temporal trends. The sample was a stratified, random sample of 400 institutions. Data were collected via a mail survey. A questionnaire was mailed to student health service directors. The findings of this study revealed that significant changes have …
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Relationships Between Landscape, Spatial Scale, and Stream Water Chemistry in a Subtropical Karst System
… to evaluate seasonal and long-term (1984-2008) temporal trends across contrasting stream flow conditions (low and high stream periods). Landscape features accounted for slightly more variation in winter (52%) versus summer (48%) water chemistry (RDA, P < 0.0001). Nitrate (NO3-N) concentrations …
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Understanding blood pressure dynamics in the South African population: a latent variables approach to the analysis and comparison of data from multiple surveys
… requires knowledge of the mechanisms underlying temporal variations of blood pressure and the relationships of such variations with socioeconomic variables.However, evidence on these mechanisms and reliable information on the temporal trends of blood pressure themselves are scant outside …
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