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 71 for “"Emission rates"”.
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Smoke off the water : determination of mass emission rates from off-gassing surfaces
… accurately give a representative sample of the emission components and the emission rate of the entire area of interest. The test methodology evolved out of literature review and experiences of two case studies which are discussed within this thesis.
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Studies of Thermal Emission Rates and Optical Cross-Sections of Carriers at Gold Centers in Silicon Using the Impurity Photovoltaic Effect
Made available in DSpace on 2015-05-12T21:41:53Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7000999.PDF: 8031245 bytes, checksum: fd46fca9713c000f5839d6f2d6e6f25d (MD5) Previous issue date: 1969
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Studies of thermal emission rates and optical cross sections of carriers at gold centers in silicons using the impurity photovoltaic effect
… it is possible to determine the thermal emission (or generation) rates and photoionization cross sections of carriers from the impurity centers! This information may be obtained without knowledge of the impurity concentration. The impurity photovoltaic effect is applied to study the …
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Ammonia Emissions from Dairy Manure Storage Tanks Affected by Diets and Manure Removal Practices
… of this study were to determine: 1) ammonia emission rates from stored scraped and flushed manure from dairy cows fed either normal or low N diet; and 2) seasonal effects on ammonia emission rates from stored scraped and flushed dairy manure. Four pilot-scale tanks were used for manure …
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Dislocation related defects in silicon and gallium nitride.
… examines the kinetics of carrier capture and emission from dislocations in silicon (Si) and gallium nitride (GaN) using deep level transient spectroscopy (DLTS) and Laplace DLTS (LDLTS).Laplace DLTS is a powerful tool in characterising point defect related emission, but until now it has not …
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Mesoscopic Fuel Consumption and Emission Modeling
… a major contributor to U.S. fuel consumption and emissions. Consequently, assessing the environmental impacts of transportation activities is essential for air-quality improvement programs. Current state-of-the-art models estimate vehicle emissions based on typical urban driving cycles. Most of …
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Quantifying the Impact of Traffic-Related and Driver-Related Factors on Vehicle Fuel Consumption and Emissions
… the dominant source of U.S. fuel consumption and emissions. Specifically, highway travel accounts for nearly 75 percent of total transportation energy use and slightly more than 33 percent of national emissions of EPA's six Criteria pollutants. Enactment of the Clean Air Act Amendment of 1990 …
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Air Pollution Distribution under an Elevated Train Station (A Case Study of Silom Station in Downtown Bangkok)
… was emitted from a simulated line source with emission rates of 0.383, 0.681, 1.293, 2.586, 5.177 and 10.77 mg/min to simulate actual pollutant emission rates. The CO₂ gas was sampled at 55 locations in the model. The Kriging method was used to interpolate the data in the study area. . Emission …
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Carbon Dioxide and Hydrogen Sulfide Emission Factors Applicable to Wastewater Wet Wells
… The extent of these problems depends on the emission rates of gases in the sewer atmosphere. To limit these kinds of problems an estimate of the gases emitted from the sewer network is to be known. In consideration to the above mentioned problems, a research has been taken up to estimate the …
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Evaluation of Ground-Based Spectral Imaging Capabilities for Detecting and Quantifying Landfill Methane Emissions
… anthropogenic sources of methane, but these emissions are subject to significant uncertainty. Due to their substantial mitigation potential, accurate and independent detection and quantification of landfill methane emissions is vital for assessing emission mitigation efforts. This thesis …
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Aerosolization of Ebola Virus Surrogates in Wastewater Systems
… surrogates into each system, and determined the emission rate of viruses into the air. While the number of aerosols released ranged from 105 to 107 per flush from the toilets or per minute from the lab-scale models, the total volume of aerosols generated by these systems was ~10-8 to 10-7 mL per …
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Thermally Generated Traps in Boron Implanted Phosphorus Doped Silicon (Semiconductor, Defect)
… Measurements were made of the carrier thermal emission rates, emission cross sections, and activation energies for two thermally generated hole traps and six thermally generated electron traps. These traps do not appear to be present in the silicon immediately after implantation; they are …
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Hydrogen Sulfide Flux Measurements And Dispersion Modeling From Constr
… near c&d landfills, few studies have quantified emission rates of h2s. The most widely used and proven technique for measuring gas emission rates from landfills is the flux chamber method. Typically the flux chamber is a cylindrical enclosure device with a spherical top which limits the gas …
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New Framework for Real-time Measurement, Monitoring, and Benchmarking of Construction Equipment Emissions
… pollutants. Monitoring and benchmarking emissions will provide practitioners with information to assess environmental impacts and improve the sustainability of construction. This research focuses on real-time measurement of emissions from non-road construction equipment and development of …
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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 …
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Atmospheric Impacts of Hydrogen as an Aviation Fuel
… offering the potential to eliminate direct CO₂ emissions while being produced with low lifecycle greenhouse gas emissions. Despite these benefits, there are additional indirect climate and air quality costs associated with direct hydrogen emissions which are often overlooked. We quantify the …
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Field and laboratory investigation of ozone-indoor surface reactions: secondary emissions inventory and implications for indoor air quality
… reactants and products in indoor environments. Emissions of volatile organic compounds, as a result of ozone-surface interactions, can lower an occupant's exposure to ozone, but increase indoor concentrations of odorous and carcinogenic compounds. Therefore, investigation of ozone-surface …
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Developing Procedures for Screening High Emitting Vehicles and Quantifying the Environmental Impacts of Grades
… highly responsible for U.S. fuel consumption and emissions, assessing the environmental impacts of transportation activities is essential for air-quality improvement programs. Also, high emitting vehicles need to be considered in the modeling of mobile-source emissions, because they contribute to …
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Modeling Size-Resolved Particle Number Emissions From Advanced Technology And Alternative Fueled Vehicles In Real-Operating Conditions
Two particle number emission datasets were analyzed in detail. The first data set contained particle number emissions from four transit buses, including two hybrid diesel-electric buses, under a variety of driving conditions and technological/fuel treatments including: diesel oxidation catalysts, …
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Infrared spectroscopy of volcanic gases at Masaya, Nicaragua
… which is renowned for strong passive gas emission unaccompanied by lava extrusion, although it has also undergone plinian eruptions in the past. Its consistent behaviour sustains a reliable tropospheric plume, making it an ideal location at which to study volcanic degassing. …
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