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 72 for “"Emission sources"”.
-
Efficient MCMC inference for remote sensing of emission sources
… and analyze a method for inferring the location, emission rate, and number of emitters from measurements taken by an aircraft. We use Reversible-jump Markov chain Monte Carlo sampling to jointly infer the posterior distribution of the number of emitters and emitter properties. Additionally, we …
-
Connecting acellular oxidative potential (OP) with chemical composition and emission sources of ambient fine particulate matter (PM2.5) in the midwestern US
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01
-
Development of a Novel Methodology for the Identification of VOC Emission Sources in Indoor Environments based on the Material Emission Signatures and Air Samples measured by PTR-MS
… of indoor Volatile Organic Compound (VOC) emission sources to clearly pinpoint the sources of concern in a field condition. This study represents the first attempt in developing a new technique to find the sources that may be invisible or hidden based on the inspection even of experts when …
-
Field emission of ZnO nano-structures produced by laser ablation
… ZnO materials for applications as field electron emission sources. The results from the work are concerned with the study of the important physical processes present in a laser ablation zinc oxide plasma plume expanding into vacuum and various ambient gas pressures. The thesis also demonstrated …
-
Unraveling the fingerprints of NOx using stable isotopes: Implications for NOx source partitioning and oxidation chemistry
… (NOx )may be a useful tool for constraining NOx emission sources as well as for understanding the atmospheric oxidation pathways responsible for its removal if various NOx sources and sink processes exhibit characteristic isotopic compositions (“fingerprints”). However, this requires (1) an …
-
EXPLOITING ADVANCED ATMOSPHERIC AEROSOL CHARACTERISATION TO DEVELOP CUTTING-EDGE APPROACHES FOR SOURCE APPORTIONMENT
… very complex systems due to the huge variety of emission sources, size distributions, chemical properties, and transformation processes. Although the characterisation of atmospheric aerosols is still challenging, their study is essential since they have different impacts both at global and local …
-
Imaging of Transient Analytical Plasmas Using Charge-Coupled Device Detectors
… has been to better understand analytical atomic emission sources. Heavy reliance on engineering designs of predecessors is exhibited, with the exception of charge coupled device (CCD) detection technology. The incorporation of a CCD into a high energy source spectroscopy laboratory is documented, …
-
Uncertainties in estimates of the oxidative capacity of the urban atmosphere : a modeling and measurement approach
Mobile emissions represent a significant fraction of the total anthropogenic emissions burden in megacities and have a deleterious effect on air quality at local and regional scales. Due to the significant sources of uncertainties involved during the estimation of mobile emissions, an adequate …
-
Quantifying Methane Emissions from Sewer Covers in an Urban Sanitary Wastewater Collection Network
… system to escape to atmosphere as an emission. However, the contribution of these emissions to municipal CH4 footprints is not well understood. In the research conducted for this thesis, direct emission measurements were made at 118 sewer covers in Calgary, Alberta, Canada to quantify …
-
Characterization and analysis of the ambient aerosol species in the Shenandoah National Park and Manassas, Virginia regions
… along with prevalent meteorological patterns, emission sources and associated topography were used to determine the geographical origin, aerosol age, and numerous other chemical and physical characteristics of the ambient aerosol. Data for the study were obtained by ground based sampling of …
-
Investigating volatile organic compound composition in Houston, Texas amidst an atmospheric regime shift.
… the importance of understanding air pollution sources. Urban areas, with dense populations and diverse activities, significantly impact air quality and, consequently, public health. Volatile organic compounds (VOCs) are a key component of urban air quality, emitted from anthropogenic and …
-
Investigating volatile organic compound composition in Houston, Texas amidst an atmospheric regime shift.
… the importance of understanding air pollution sources. Urban areas, with dense populations and diverse activities, significantly impact air quality and, consequently, public health. Volatile organic compounds (VOCs) are a key component of urban air quality, emitted from anthropogenic and …
-
Using novel portable air quality monitors to improve personal exposure and dose estimations for health studies
… pollutants. The deployments showed that local emission sources had often a far more important impact on personal exposure than regional sources, and the air pollution composition changed distinctively between local microenvironments. The home environment was identified as an important exposure …
-
AI-Based Framework for Identifying Wood Burning Appliances through Chimney Recognition
… inventories such as the U.S. National Emissions Inventory (NEI). To address this limitation, we proposed a novel computer vision framework that leverages visible chimney features as proxies for wood stove usage. Using data from drones, vehicle-based videos across urban and rural areas, …
-
Qualitative and quantitative assessment of UCM in PM2.5 of Bakersfield, CA.
… and qualitatively assessed for possible emission sources. The average spectrum from the UCM suggested the presence of alkanes, alkenes, and alkynes in the low-molecular weight UCM; and the presence of linear, branched, and cyclic alkanes in the high-molecular weight UCM. The method …
-
Local variation and regional transport of tropospheric ozone over Cape Town
… Previous studies have identified local emission sources and meteorological conditions associated with both the air pollution and the brown haze in Cape Town. However, due to the transport of air pollutants, emissions from remote sources may also contribute to air pollution levels in Cape …
-
Commercial and informal atmospheric emissions in the Mexico City Metropolitan Area : scenario analysis and policy proposals
… sectors contribute with significant amounts of emissions to the atmospheric pollution problem of the Mexico City Metropolitan Area (MCMA). It is more the case for some pollutants than for others, but, in any case, policies tackling the emissions of these sectors have been very few, and of very …
-
Development of optical field emitter arrays
Optical field emitters are electron emission sources actuated by incident light. Optically actuated field emitters may produce ultrafast pulses of electrons when excited by ultrafast optical pulses, thus making them of interest for specific applications such as ultrafast electron microscopy, …
-
Optimization of Private Equity Investments for Industrial Carbon Emission Reduction
… a significant portion of global greenhouse gas emissions. They must reduce these emissions due to financial, regulatory, and customer pressures, but the pathways to net zero emissions are complex and costly. For companies held by private equity, the inaction is exacerbated by a lack of clarity …
-
The Future for Oil & Gas Majors: Activity in the Low Carbon Space & Market Reactions
… Specifically, this study examines greenhouse gas emissions reductions strategies, investments in the low carbon space, and public market reactions to the energy transition. The global energy supply is forecasted to shift rapidly from hydrocarbons – oil, natural gas, and coal – to cleaner, …
Page 1 of 4