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 10 of 10 for “"Particle Number Concentration"”.
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Assessment of nanoparticle emission of polypropylene, polyester and epoxy nanocomposites during automated drilling process.
… exposure, or the impact of embedded nanoparticles in commercial composites when they are released during machining processes. In this thesis, four groups of nanocomposites are identified as being used within industry and having potentially-harmful nanoparticles - the nanocomposites …
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Mobile Monitoring of Air Quality in the Washington DC Region
… the within-city variability of air quality for Particle Number Concentration (PNC), fine particulate matter (PM2.5), and Black Carbon (BC) using mobile monitoring. 2. Derive a method for selecting the best representative mobile monitoring routes to capture within-city spatial patterns of air …
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ASSESSMENT OF THE RELATIONSHIP BETWEEN OUTDOOR AND INDOOR CONCENTRATIONS OF AIRBORNE PARTICULATES IN RESIDENTIAL BUILDINGS IN SINGAPORE
… comprehensive indoor, outdoor and personal particle characterization study was conducted in a non-smoking apartment for a period of 2 to 10 days during April, 2003 to May, 2003. Concurrent indoor, outdoor and personal particle number measurements were recorded using a handheld condensation …
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Characterisation of Microphysical and Optical Properties of Atmospheric Aerosols in a High Arctic environment: Villum Research Station, NE Greenland
Atmospheric aerosols are solid or liquid phase particles which are suspended in ambient air. These particles have an impact on the climate through direct and indirect radiative forcing, and their measurement presents challenges in high latitude environments where concentrations may fall under the …
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Ultra-fine soot investigation in flames
In-flame soot particle size and concentration analysis techniques were developed for high concentrations of ultra-fine soot particles (particle diameters<< 1000 nm) using a Scanning Mobility Particle Sizer (SMPS). The SMPS particle size results were compared to results obtained by thermo phoretic …
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Impact of Road Proximity and other Determinants of Air Quality along Multi-Use Trails in the National Capital Region
… way to reduce health impacts as the pollutant concentration is typically lower on trails, however, proximity to nearby roadways can deteriorate the air quality in multi-use trails. The goal of this study is to investigate the air pollutant concentrations on multi-use trails adjacent to …
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Entropy, Energy and Dynamics of Coalescing Spherical and 1D Aerosols
… in scenarios characterized by non-coalescing particles (minimal surface entropy change) and homogenous mixing (no configurational entropy change). Thus, they do not play a dominant role in the formation of SPD. A scaled entropy production, *σ*<sub>scaled</sub>, is introduced and shown to …
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On the Dynamics within a Gas Phase Process for Continuous Carbon Nanotube Synthesis
… how to control the formation of the catalyst nanoparticles is, therefore, essential to producing a desired CNT product and successfully scaling up the FCCVD process. This dissertation connects information on the decomposition of reactants, axial catalyst nanoparticle dynamics and the morphology of …
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Studies in Advanced Oxy-combustion Technologies
… The system is also designed to minimize particle deposition to avoid slagging, fouling, and corrosion, and simulations of ash deposition indicate negligible deposition on the furnace wall. Radiation behavior is also studied to demonstrate radiative trapping effects. It is demonstrated, …
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VEHICLES¿ NON-EXHAUST EMISSIONS: SETUP OF EXPERIMENTAL APPROACHES FOR ON-ROAD CHARACTERIZATION OF TIRE WEAR AND ROAD DUST PARTICLES
… particularly those from tire and road wear particles (TRWPs), have emerged as a dominant and under-investigated source of airborne particulate matter. TRWPs are mechanically generated, chemically complex, and highly variable, posing challenges for both environmental monitoring and regulatory …