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 13 of 13 for “"particulate mass"”.
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Effect of driving cycles on the particulate mass and number emissions from in-use heavy heavy-duty diesel vehicles
This study focused primarily on the particle mass and number emission from various in-use heavy heavy-duty diesel vehicles operating on different driving cycles. Chemical speciation results are also presented to discuss the formation and composition of particles emitted during various cycles. Tests …
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Scaling and Performance of a Device for Fluidized Bed Entrainment Reduction
… Relations were proposed for scaling the particle mass flux field above the device. Experimental studies were done on two geometrically similar flow systems, using fluidized beds with diameters of 9.5 cm and 33.3 cm. Measurements were made of the particulate mass flux and gas velocity in the dilute …
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Determinants of occupational allergic respiratory disease and asthma in spice mill workers
… manual. The samples were analysed for inhalable particulate mass, specific spice dust allergens (garlic) and endotoxin using ELISA inhibition (antibodies from sensitised subjects) and chromogenic LAL assays.
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Modeling event-based coupled hydrologic and mass transport in small urban watersheds
… the event-based coupled hydrologic and mass transport processes of particulate matter and their eventual fate in unit operations/processes, several methodologies were developed. Discrete rainfall-runoff events data were collected at two similar urban watersheds for model calibration and …
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Electrical interaction between atmospheric volcanic ash and aircraft in flight : mechanisms and application for hazard detection
… of aircraft surfaces in flight by ice and other particulates has been studied since the 1940’s, and volcanic ash suspended within dispersed plumes has been a hazard to aviation since the advent of commercial jet airliners in the 1960s. This study examines the interaction of volcanic ash particles …
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Volatility properties of the ambient and laboratory generated aerosol
… reported values. The measured total suspended particulate mass was comparable to the absorptive organic mass estimated using gas-particle partitioning theory. In addition, we evaluated a new method for estimation of enthalpy of vaporization using volatility tandem differential mobility analyzer …
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Ash impacts on gasoline particulate filter performance and service life
… Separate new regulations that aim to reduce particulate emissions to address air pollution concerns are taking effect concurrent with greenhouse gas limitations in both jurisdictions. GDI engines are proven to create more particulate emissions than previously utilized port-injection …
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The study of occupational risk factors and interventions for baker's allergy and asthma among supermarket bakery workers
… determination of inhalable concentration of particulate mass and specific allergen levels. The intervention employed a group-randomised design to evaluate dust control measures. Results: Prevalence of probable occupational asthma (POA, 13%) was higher than atopic (AA, 6%), non-atopic (NAA, …
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An investigation of the generation of acoustic emission from the flow of particulate solids in pipelines
The transport of particulate in a gas flow or pneumatic conveying system 1s widespread in many areas of industry, for example chemical, food processing, cement industries and transportation of pulverised coal in coal-fired power plants. However, a simple and reliable method for monitoring the flow …
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Development of improved sampling and analysis methods for measuring organic, elemental, and water-soluble organic carbon in atmospheric aerosols and application to aerosol studies in Europe and tropical/equatorial and oceanic regions
… from the front filter OC yields “artifact-free” particulate OC data. With regard to objective (3), the median PM2.5 EC concentrations at our various sites in Europe ranged from 0.07 μg/m3 in the 2007 campaign at Hyytiälä, Finland, to 3.3 μg/m3 during the 2002 campaign at a kerbside site in …
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Measurement and control of particulate emissions from cattle feedlots in Kansas
Emissions of particulate matter (PM) are an increasing concern for large open beef cattle feedlots. Research is needed to develop science-based information on PM emissions and abatement measures for mitigating those emissions. This research was conducted to (1) measure PM concentrations emitted …
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The chemistry, biology, and vertical flux of oceanic particulate matter
Particulate matter samples, split into <l μm, 1-53 μm, and >53 μm size fractions have been obtained using a Large Volume in situ Filtration System (LVFS) during the SOUTHLANT expedition, R/V CHAIN 115. Profiles to 400 m are reported for LVFS Stns. 2 and 4-8. Stns. 4, 5, and 8 (S. E. Atlantic, …
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Zeitskalenübergreifende Berücksichtigung von partikulärem Stofftransport in einer Langfrist-Gewässergüteprognose für Fließgewässer
An adequate tool for preparing long term plans for water management is the probabilistic water quality prediction. Because of the long simulation period, and numerous repeated, stochastic varied calculations normally a static calculation with large time steps is used. Withal the erosion process at …