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 835 for “"Environmental impacts"”.
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Geothermal Systems Performance and Environmental Impacts
… purposes is plagued by problems including environmental impacts, unsustainable production, and increased greenhouse gas production. This had led to a worldwide interest in developing sustainable sources of energy. One such energy is ground source heat which is the ubiquitous low-enthalpy …
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Environmental Impacts on Simulated Galaxy Properties
Galaxies in the Universe come in a variety of shapes, sizes, and colors. The range of properties is produced from a combination of physical processes. Galaxies live within various structures and therefore receive different influences from their environment that alter their evolutionary pathways. …
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Environmental Impacts of Future Aviation Propulsion Systems
… the scientific understanding of the atmospheric impacts attributable to aviation gas turbine emissions and the means of mitigating them with a focus on the propulsion system. Specifically, this thesis addresses aspects of 1) aerosol formation from aviation-attributable NOx and SOx, 2) the …
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Biomass to ethanol : potential production and environmental impacts
… fossil fuel consumption and greenhouse gas impacts of ethanol produced from three feedstocks; corn grain, corn stover, and switchgrass. A life-cycle assessment approach with an integrated Monte Carlo uncertainty analysis is applied to each of these three bioethanol pathways. Incorporating a …
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Regulating the environmental impacts of the electricity supply industry.
… of electricity and costs associated with environmental impacts. The optimal situation would be one where such impacts are minimised per unit of electricity service used, notwithstanding cost considerations. However, the present regulatory regime fails to account sufficiently for …
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Quantifying the environmental impacts of selected sustainable transportation policies
… funding allocation and to quantify the environmental impacts of first, High Occupancy Vehicle (HOV) lanes and carpooling as a realization of avoid strategies; and second, Plug-in Electric Vehicles (PEVs) as an example of replace strategies. The resulting models have a wide range of …
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Accelerated Construction of Roadways: Life Cycle Assessment and Environmental Impacts
… a long-term perspective of economic, social, and environmental progress, which not only addresses the present conditions but also includes the needs of future generations. The massive network of roadways in United States has the potential to contribute considerably towards achieving sustainability …
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Physical chemical processes and environmental impacts associated with home composting
… in order to make quantitative estimates on the environmental impacts of home composting. The focus of the work was climate relevant gaseous emissions, and developing and utilising a methodology for quantifying them. Experiments using 220L open bottomed home compost bins, alongside purpose built …
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Environmental impacts on the microbial methane cycle in freshwater sediments
Contains fulltext : 218749.pdf (Publisher’s version ) (Open Access)
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Investigating the Environmental Impacts of Western Canadian Tight Oil Resources
… crude produced. Despite rapid development, the environmental impacts associated with the production and use of this resource are still being understood. Production is spread widely across multiple provinces, varying in production characteristics and facing unique environmental and operational …
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The environmental impacts of upgrading the Olushandja Dam, northern Namibia
… in northern Namibia within the framework of the environmental impact assessment carried out for the project. This will enable the Namibian Department of Water Affairs (DWA) to improve their management of the dam for the benefit of the local communities and consumers in the Oshana Water Region …
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Non-CO₂ environmental impacts of transportation fuel use and production
… This thesis aims to quantify three specific environmental impacts from transportation fuel combustion and production: 1) Health impacts from transportation combustion emissions in the United States. A multiscale air quality model is applied to assess health impacts from PM 2.5 and ozone …
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Isolated Traffic Signal Optimization Considering Delay, Energy, and Environmental Impacts
Traffic signal cycle lengths are traditionally optimized to minimize vehicle delay at intersections using the Webster formulation. This thesis includes two studies that develop new formulations to compute the optimum cycle length of isolated intersections, considering measures of effectiveness such …
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Biofuels from Liquefaction of Marine Microalgae: Production, Upgrading, and Environmental Impacts
Algal biomass is an attractive source for liquid fuel production as it grows rapidly even in adverse conditions, and fixes carbon dioxide from the atmosphere by photosynthesis. Hydrothermal liquefaction (HTL) of microalgae is a promising conversion technology in which algal biomass is treated as an …
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Evaluation of Airline Efficiency and Environmental Impacts Using Data Envelopment Analysis
… investment into understanding and improving the environmental impact of airline operations. This study is intended to partially fill a gap in exigent literature. While limited data envelopment analysis including environmental impacts has been conducted, the models treat environmental impacts as …
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The environmental impacts and developmental constraints of tidal current energy generation.
The thesis discusses the environmental impacts and developmental constraints of tidal current energy. Using an iterative approach and drawing upon a number of different methodologies the thesis attempts to evaluate the development potential of tidal current energy in terms of the resource and …
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Economic and environmental impacts of several retrofit options for residential buildings
… Europe. The aim of this paper is to evaluate the environmental and economical impact of several retrofit options for residential buildings. Our study focuses on the Walloon Region of Belgium. A “bottom-up” methodology is applied: this methodology focuses first on a micro-analysis. Results from …
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