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 16 of 16 for “"Dispersion patterns"”.
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Dispersion patterns of Holarctic-breeding, migrant landbirds : global paradigms or regional patterns?
… of the three flyways. It aims to compare how patterns of migration between the temperate and tropical latitudes vary spatially in response to a) the geography of the land masses, b) relative availability of different habitat types, c) dietary preferences and d) foraging mode.
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Development, Verification, and Future Applications of a 3-DoF Entry and Descent Simulation Tool
… and to present a brief analysis of possible dispersion patterns related to autonomous radiosonde deployment on the surface of Mars.</p> <p>The EDL simulation tool is written in Matlab. The aerodynamic information used by the tool is obtained with the use of HEAT/TK. HEAT/TK is an aerodynamic …
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Evaluating in situ Grazing Patterns of Lytechinus variegatus and their Effects on Seagrass Beds of Thalassia testudinum
… part of the bed. Urchin movement experiments and dispersion patterns indicate that urchins move more where seagrass cover is low. Field surveys and lab choice experiments indicate that urchins tend to be detrital consumers of seagrass blades rather than herbivores on live seagrass tissue. …
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Competition Between Fox (Sciurus Niger) and Gray (S. Carolinensis) Squirrels (Illinois, Habitat Selection, Behavior)
… behavior) were identified and although some dispersion patterns could be interpreted as the result of competitive interactions, the manipulation of fox squirrels provided no conclusive evidence that densities of either fox or gray squirrels could be explained simply by competition.
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Intraspecific trait variation and community assembly in old-field grasslands
… States. In the first study I analyzed spatial patterns of functional divergence in old fields in central New York on spatial scales from 1-1500 m. Results showed that spatial divergence in functional traits at the community and intraspecific levels corresponded with spatial heterogeneity in …
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Integrated data-driven techniques for environmental pollution monitoring
… clustering is used to visualize air flow patterns at two time scales relevant for ozone buildup. First, clustering is performed at the hourly time scale to identify surface flow patterns. Then, sequencing is performed at the daily time scale to identify groups of days sharing similar …
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Atmospheric dispersion modelling of particulate and gaseous pollutants affecting the trans-Manche region
… determine large-scale and meso-scale atmospheric dispersion patterns. The research is only concerned with outdoor exposure to atmospheric pollutants and aims to identify pollution sources using dispersion modelling with the assistance of ground level measurements from British, French and other …
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Exploration of parameters affecting jet injection using a high-speed X-ray imaging system
… possibly introducing a defect of an asymmetric dispersion pattern. The second part of this thesis examines the effects of contact force and jet shape on the jet injection using the newly optimized parameters for the imaging system. The presence of 1 N contact force in jet injection reduced the …
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An Investigation of the Gas Dispersion Properties of Mechanical Flotation Cells: an In-Situ Approach
… experimental investigation of gas dispersion performance of two commercially available flotation cells. To facilitate this investigation, a continuous pilot-scale flotation system was developed and tested. The results of the hydrodynamic and metallurgical testing conducted on the …
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Aspects of the ecology of migrant shorebirds (Aves: Charadrii) at the Berg River estuary, South Africa
… their distribution, abundance and behavioural patterns. The findings were related to the dispersion patterns of waders on the east Atlantic seaboard, and their significance was evaluated in the light of predictions of current models for the migratory behaviour of shorebirds. Controversy over …
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Dispersion of water sprays in a transverse air jet and the aging of spray nozzles
… The spray atomization qualities and the spray dispersion patterns of the nozzles used on the glass production lines are examined. The droplet diameter, velocity and number flux are measured with a Phase Doppler Particle Analyzer. When the fibers are pulled from the bushing plate, they move at …
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Preparation and characterisation of poly(ethylene terephthalate) and poly(vinyl alcohol)/clay nanocomposites.
… and sodium montmorillonites showed similar dispersion patterns. Charge reduction of the lithium clay had a strong influence on the dispersion of the clay. Lower charged layers resulted in poorer dispersion. Li+ MCBP fired at 210 °C did not form nanocomposites with PVOH independent of the …
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Lichens as a biomonitoring tool for detecting heavy metal air pollution associated with industrial activities in Collie, south-western Australia
… have been used effectively to determine the dispersion of heavy metals emitted by industrial point-sources; however the approach has not been commonly used in Australia. This thesis aimed to determine the effectiveness of using a lichen biomonitoring approach to measure the heavy metal …
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Seasonal Habitat Use of The Florida Manatee (Trichecus Manatus Latirostris) In The Crystal River Natural Refuge With Regards To Natural And Anthropogenic Factors
… by humans. This study documented the seasonal dispersion and behavioral patterns of manatees in Kings Bay with regards to natural and anthropogenic factors from May 2005-June 2006. Survey stations were established across the bay and the number of manatees, people in the water, and boats were …