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 1473 for “"Particulate"”.
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Comparative particulate sampling methods
… determining the mass concentration of suspended particulate matter in ambient air. Most of these methods, including the EPA reference method, require manual filtering and weighing of the collected sample. This is both costly and time-consuming and is subject to a considerable amount of human …
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Microscopy investigations of ash and particulate matter accumulation in diesel particulate filter surface pores
… have resulted in the creation of more stringent particulate matter emissions regulations in the United States and European Union. These limits have forced diesel engine manufacturers to reduce particulate matter (PM) emissions by an order of magnitude beginning in 2007. Diesel particulate filters …
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Fine Particulate Matter, Neuropathologies, & Dementia
Neurodegenerative disorders, including Alzheimer’s disease (AD) and related dementias (ADRD), affect over 47 million people worldwide, and this number is anticipated to reach 131.5 million by 2050. Because no medication successfully reverses the course of dementia, researchers are focusing …
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Understanding particulate coating microstructure development.
How a dispersion of particulates suspended in a solvent dries into a solid coating often is more important to the final coating quality than even its composition. Essential properties like porosity, strength, gloss, particulate order, and concentration gradients are all determined by the way the …
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Fracture Morphologies in Particulate Suspensions
… of the fracture dynamics and morphology in two particulate suspensions: Drying sessile drops of colloidal suspensions and discontinuously shear-thickening suspensions subject to air injection. Wefirst highlight distinct modes of stress release in drying drops of colloidal suspensions. As water …
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Intraurban Variability of Ambient Particulate Matter
… of spatial and temporal variability in ambient particulate matter: PM) is important for effective air quality management and for assessing potential exposure misclassification in epidemiological and exposure studies used to support health-based standards. Spatiotemporal variability of PM in …
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Intruder Dynamic Response in Particulate Media
Many everyday materials, broadly classified as ``particulate media'', are at the heart of many industries and natural phenomena. Examples range from the storage and transport of bulk foods and aggregates such as grains and coal; the processing of pharmaceutical pills and the grinding coffee beans; …
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STRESS RESPONSE OF STATIC PARTICULATE MEDIA
The mechanical properties of granular media are investigated using large-scale computer simulations. We probe the relationship between structural and mechanical properties in static, three dimensional granular packings through the development of a coarse graining procedure that connects the …
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Field induced assembly of particulate systems
The primary focus of the first part of this dissertation is to study the AC field-driven assembly of monodisperse silica and glass particles on liquid - liquid interface and forming a liquid film of uniform thickness having arrangement of particles on it. This liquid film with arrangement of …
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Particulate dispersions for magnetic recording data
The study of a magnetic recording media dispersion has been carried out using hindered settling analysis, the purpose of which was to probe the equilibrium state structure in zero applied magnetic field. The system chosen for the main study was based on a commercial formulation of a y-Fe 203 …
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Computer stimulations of particulate recording media
… here are several computer simulations of particulate recording media, based on models of their microscopic behaviour. The simulations were used to probe the macroscopic behaviour of the systems and relate this to the microscopic models used. The four areas covered are: Time dependence in …
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Magnetism of anthropogenic airborne particulate matter
… global burden of disease associated with ambient particulate matter (PM<sub>2.5</sub>) pollution is the leading threat to life expectancy according to the Air Quality Life Index (AQLI) 2023 report. The study of airborne PM is key to understanding both its source, and its impact on human health. …
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Biological and particulate contaminants in interfaces
The transport of biological, chemical, or particulate contaminants shapes disease transmission, chemical spills, climate, ecology, and bio-hazard risks. Yet, little is understood on the mechanisms controlling droplet formation and selection of droplet sizes and contamination levels from a …
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Particulate vanadium in the Cambridge atmosphere.
Massachusetts Institute of Technology. Dept. of Geology and Geophysics. Thesis. 1966. M.S.
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Geochemical Investigations of Respirable Particulate Matter
… course of our lives we are exposed to airborne particulate matter in the workplace, home, and environment that results in the deposition of millions of particles in the lung. These exposures may result in disease if they are significant enough. The potential for harmful exposure depends in part …
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The biogeochemistry of marine particulate trace metals
… a combination of method development, basin-scale particulate collection and analyses, modeling, and field experiments, this thesis examines both the distributions of marine particulate trace metals and the underlying processes—inputs, scavenging, vertical and horizontal transport, and biotic …
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Dynamic simulation of particulate and molecular systems
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Granular packing of millimeter-scale and micrometer-scale particles with three different size distributions (monosize, bimodal and Gaussian) are studied using the Distinct Element Method (DEM). The dissipative forces including …
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Transverse susceptibility measurements on particulate recording media
… transverse susceptibility (Xi) measurements on particulate recording media has been made. The main use of this measurement is to determine the anisotropy field (Ilk) of a material which is one of its intrinsic properties. Previous theoretical modelling of Xi was reviewed and a description given …
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