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 17 of 17 for “"contiguous US"”.
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A Dynamic Space-Time Panel Data Model of State-Level Beer Consumption
… panel data model containing random effects is used to examine state-level beer consumption over the period of 1970 to 2007 for the 48 contiguous US states and the District of Columbia. A valuable aspect of dynamic space-time panel data models is that the parameter estimates from these models …
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QuickLET : a web-based tool for estimating pollutant loads in a watershed
… from intensive efforts required to gather enormous amount of data, the complexity of the modeling tools themselves hinder their application among non-technical users. Consequently, environmental decision makers often rely on outside consultants to perform watershed assessments for them. This …
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Quantification of Effect of Solar Storms on TEC over U.S. sector Using Machine Learning
… We study the dependence of TEC over the contiguous US on various storm parameters, including the onset time of the storm, the duration of the storm, its intensity, and the rate of change of the ring current response. These parameters are inferred autonomously and compared to TEC values …
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Energetic Path Finding Across Massive Terrain Data
… was on foot. Unfortunately, many of the trails used by ancient travelers have long since been abandoned. We present a software tool which can help visualize and predict where these forgotten trails might lie through the use of a human-centered cost metric. By comparing the paths generated by our …
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A spatiotemporal analysis of Army base distributions in the contiguous United States from 1800 to 1900
The cartographic exploration of US Army fort and personnel variation in the contiguous United States has been well developed in the past, but not nearly enough to capture the essence of this interesting historical geography. In order to address this shortcoming in the geographical literature it was …
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A spatiotemporal analysis of Army base distributions in the contiguous United States from 1800 to 1900
The cartographic exploration of US Army fort and personnel variation in the contiguous United States has been well developed in the past, but not nearly enough to capture the essence of this interesting historical geography. In order to address this shortcoming in the geographical literature it was …
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An Investigation into Contrail Observability from Different Satellite Platforms
… and moist conditions, spread into contrail cirrus that persists for several hours. By adding to the existing cloud cover, contrails can act to either cool or warm, with the latter, on average, being dominant, resulting in an overall warming effect. Although the effective radiative forcing from …
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Impacts of large quantities of wind energy on the electric power system
… in the power system, bringing new challenges because of the variability and uncertainty of this renewable resource. Therefore, the understanding of how wind energy could affect a power system is of great significance to system operators, regulators, investors and policy makers. This thesis …
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Decarbonizing the US Power Sector
As the second highest national emitter, the US has the opportunity, and responsibility, to reduce emissions and mitigate the impacts of climate change. The power sector has been identified as the linchpin in our national decarbonization strategy, with high electrification goals for the other …
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Forces Structuring Caddisfly Communities: Biogeographical to Anthropogenic Effects
… Trichoptera, within the Nearctic bioregion. I focused primarily on communities in running-water (lotic) systems in the United States and Canada. Much of my research on Trichoptera specimens and freshwater habitat was generated from publicly available data. First, I examined the biogeography of …
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Toward circular and sustainable nitrogen (N) management in the US and globally
… in agricultural productivity. Yet inefficient N use has generated widespread air and water pollution, greenhouse gas (GHG) emissions, and ecosystem degradation, undermining food-energy-water (FEW) sustainability. Despite substantial efforts to improve farm-level nutrient management, persistent …
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Spatial and temporal variation in precipitation pattern
… in hydrology. The human activities are a major cause of change in hydrological cycle. The fluctuations in hydrological cycle can influence the dynamics of ecosystem. The changes in global water cycle and the corresponding redistribution of precipitation is a threat to food availability, stability, …
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Understanding drought propagation and its implications for drought management
… most complex natural disasters, especially because they involve interactions between numerous climatological, hydrological and human processes. During a drought event, deficits in precipitation gradually translate into deficits in soil moisture, streamflow, and aquifer and reservoir storages, …
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Air pollution and early deaths in the United States : attribution of PM₂.₅ exposure to emissions species, time, location and sector
Combustion emissions constitute the largest source of anthropogenic emissions in the US. They lead to the degradation of air quality and human health, by contributing to the formation of fine particulate matter (PM2 .5 ), which is harmful to human health. Previous work computed the population PM2 …
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The Emergence of Lyme Disease in Appalachia (2000-2019)
Emerging infectious diseases continue to threaten human health and healthcare resources across the world, and with the sustained emergence of some like Lyme disease, this trend is only expected to get worse. Even though some research has examined the spread of Lyme disease in different parts of the …
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Essays on testing spatial models
"This thesis mainly develops robust Rao’s score tests (Lagrange multiplier (LM) tests) for different types of spatial models. The models studied in this thesis include a spatial dynamic panel data (SDPD) model and a nonlinear SAR (NSAR) model. The proposed test is aiming to solve model selection …
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Epidemiology of diabetes and related mortality: early screening, socioecological determinants, and the value of prevention
The focus of my dissertation is prediction, prevention, and economic valuation of type 2 diabetes. I studied individual level type 2 diabetes risk factors, spatial spillover effect of diabetes-related mortality ecological risk factors, and individuals’ loss of well-being due to diabetes. In the …