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 53 for “"Emission Rate"”.
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Characterization of lube oil derived diesel engine particulate emission rate vs. lube oil consumption
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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Performance of continuous emission monitoring systems at operating oil and gas facilities
Globally, demand to reduce methane (CH4) emissions has become paramount and the oil and natural gas (O&G) sector is highlighted as one of the main contributors, being the largest industrial emission source at ≈30%. In efforts to follow legislation of CH4 emission reductions, O&G operators, emission …
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The transfer of polarized radiation in astrophysical masers in the presence of magnetic fields
Polarized emission from astrophysical masers can provide important information about physical conditions in both star forming and circumstellar environments. Calculations are performed which give the spectra of the emergent maser radiation for different magnetic fields, radiative intensities, decay …
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Power plant carbon dioxide emission quantification with plume modeling
The quantification of carbon dioxide emissions pose a significant and multi-faceted problem for the atmospheric sciences as a part of the research regarding global warming and greenhouse gases. Emissions originating from point sources, referred to as plumes, can be simulated using mathematical and …
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Analysis of rbd palm olein abrasive blasting as new metal surface cleaning method
… process, personal dust exposure reduction, emission rate reduction and corrosion inhibition. In this research, the performance of RBD palm olein abrasive blasting was evaluated using ISO 8501-1 visual assessment method. Abrasive blasting workers’ exposure level to the dust release from …
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Mercury Emissions from Polyurethane Flooring in Gymnasiums
… the chamber tests can adequately emulate mercury emissions in school gymnasiums, and using the results of the laboratory experiments, successfully analyze the emissions curve to determine what factors drive the profile. The laboratory testing was successful in emulating the condition of a school …
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Air quality at an electric-arc steel manufacturing plant
… source. Using this relationship, an estimated emission rate for the facility was calculated. A background level for the area in the vicinity of the facility was found. Some conclusions were that the mean level of concentration decreased exponentially with distance from the source and that the …
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Control of Optical Processes in Diamond using Plasmonic Nanogap Cavities
… is to utilize the Purcell effect to improve the emission rate, directionality and brightness of quantum emitters, as long decay times, nondirectional emission and weak fluorescence limit their applications. One particularly promising emitter is the silicon vacancy (SiV) in diamond, which offers …
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Volatile organic compound fluxes and mixing ratios in two contrasting atmospheric environments : London and the Amazon rainforest
… in central London had a five-month average total emission rate of 1.4 mg m-2 h-1. Comparisons with local and national emission inventories showed that modelled emissions were largely underestimated. Measurements of isoprene and monoterpenes at the remote ZF2 site in the Amazon rainforest showed an …
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Purification and characterization of methyl chloride transferase: A novel halogenating enzyme
… is biologically produced at an annual global emission rate of $5\times10\sp6$ tons. Production of this molecule is thought to be mostly biological in nature. The established route for production of halometabolites is the hydrogen peroxide-dependent halogenation mechanism common to …
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GASMAK2 model for longwall gob gas emission
… model; it uses an empirically determined gas emission rate as an input. The computer program divides Longwall panels into segments, keeps track of the face advance and generates emission rates and volumes for both the entire panel and for individual zones within the panel. This model is …
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Missing methane: Machine learning for satellite remote sensing of methane
… change, brought on by decades of anthropogenic emission of greenhouse gases into our atmosphere. The increased abundance of greenhouse gases like carbon dioxide and methane has warmed our planet dramatically above pre-industrial levels. Rising global temperatures lead to increasingly frequent …
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3D Simulator for Wind Interferometer Data-Model Comparison
… and direction with 2 discrete MIGHTI units, separated by 90˚, mounted on the ICON Payload Interface Plate. This work focuses on building a simulation of wind interferometer data, similar to MIGHTI, using a first-principles model as the input dataset, which will be used for early validation and …
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Vehicular Ammonia Emissions in Baltimore, Maryland
… H2 in the three-way catalytic converter. Ammonia emissions were measured using a mass balance on the Fort McHenry Tunnel, Baltimore, Maryland. Atmospheric concentrations of gas-phase and particulate-phase ammonium were measured during 2003-2004 using denuders and filter packs. The average vehicle …
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Plasmonic metamaterial for structural color printing and spontaneous emission control
… color printing, and quantum emitter spontaneous emission enhancement.</p><p>In this dissertation two of the most important applications will be addressed. The first application is structure color printing and the other is to control the spontaneous emission rate of quantum emitters such as …
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Emissions of Phthalate Plasticizer from Polymeric Building Materials
… contain a vast array of contaminating sources. Emissions from these sources produce contaminant concentrations that are substantially higher indoors than outside. Because we spend most of our time indoors, exposure to indoor pollutants may be orders-of-magnitude greater than that experienced …
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The impact of electron traps on the transfer performance of acoustic charge transport devices
… the experimental results. An increase in trap emission rates is observed in the presence of the surface acoustic wave (SAW) used to transport charge in the ACT device. The emission rate enhancement caused by the SAW is investigated through deep level transient spectroscopy (DLTS) studies, …
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Monitoring and Predicting the Long Distance Transport of Fusarium graminearum, Causal Agent of Fusarium Head Blight in Wheat and Barley
… inoculum of F. graminearum. Perithecia were generated on artificial (carrot agar) and natural (corn stalk) substrates. Artificial substrate (carrot agar) produced 15±0.4 perithecia cm-2, and natural substrate (corn stalk) produced 44±2 perithecia cm-2. Individual perithecia were excised from both …
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Indoor Air Monitoring of Ethanol and Benzene in a Pilot Winery Using Active Sampling
… were conducted to determine the air exchange rate of the winery workroom. A single-space mass-balance model was used to estimate the air exchange rate for the entire workroom. The calculated air exchange rates were correlated with wind speeds and wind direction to create a linear model …
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Mass spectrometric investigation of the OH induced oxidation of isoprene using 0 2 + as a chemical ionization reagent
… atmosphere by vegetation, with an annual global emission rate of 500 Tg/yr. It represents almost 50% of all biogenic non-methane hydrocarbons on a global scale. It has a substantial impact on troposphere oxidants. The focus of this research is a preliminary investigation of isoprene oxidation …
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