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 26 for “"spatial spread"”.
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Spatial spread of infectious diseases
… in the form of simple diffusion have on the spreading of infectious diseases. This study is undertaken within the context of the SI and SIR models, two of the most fundamental models for the propagation of infectious diseases. The diffusive SI and SIR models are supplemented with no flux …
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Spatial spread of farm animal diseases
Data on cattle movements within the United Kingdom have recently become available. As part of the conditions for lifting an export ban on British beef following the bovine spongiform encephalopathy epidemic, the European Union required that the UK should have "An effective animal identification and …
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Stretch induced hyperexcitability of mice callosal pathway
… also developed analytical tools to quantify the spatial spread and response strength. Results show that the spatial spread is less stable in slices undergoing the stretch-unstretch cycle. FA amplitude and activation rate decrease as excitability increases in stretch cases but not in electrically …
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NIR light transmission through skin and muscle
… different thicknesses of animal tissue and its spatial spread due to the scattering effect. Primarily pork skin and muscle tissues are used due to their similar optical properties to human tissue. Tissue thicknesses range from 4 mm to 20 mm. A NIR LED array with the wavelength of 875 nm serves …
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The effect of varying mixtures of soybean and cereals on the landing rates of aphid vectors and spread of soybean mosaic virus (SMV) and maize dwarf mosaic virus (MDMV)
… soybean/cereal mixtures on the incidence and spatial spread patterns of foregut-borne non-persistently transmitted plant viruses such as soybean mosaic virus (SMV) and maize dwarf mosaic virus (MDMV), and also on the landing rates of the aphid vectors that transmit them. The uniqueness of this …
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A Geospatial Analysis of Norovirus Outbreaks in California, and an Investigation of the Impact of Environmental Variables
… with environmental variables and exhibit spatial spread patterns. Few studies have been done looking at what causes norovirus seasonality in temperate climates and more research is needed on the regional level. This study aims to find what relationships exist with outbreak occurrence and …
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A modeling framework for spatial transmission of Covid-19 in local communities
… and statistical tools to analyze and predict the spatial transmission dynamics of COVID-19, which could provide invaluable benefits to global public health to reduce the chances of emerging new waves and control the epidemic. The current mathematical and statistical models have proved insufficient …
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Mathematical models for vector-borne disease: effects of periodic environmental variations.
… model for several years. Finally, I studied the spatial spread of a vector-borne disease throught an impusive reaction-diffusion model and I showed some simulations.
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A two-dimensional numerical model of the high electron mobility transistor
… in the channel is presented. In this model, the spatial spread of the electron concentration in the quantum well normal to the heterojunction is taken into consideration by solving Schrodinger's and Poisson's equations self-consistently. The Boltzmann transport equation in the form of a current …
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Head movements of children in MEG : quantification, effects on source estimation, and compensation
… forward solution method proposed earlier. The spatial spread of ECDs as determined with a bootstrapping approach was also reduced after SSS correction. In addition, the MNE source estimates were spatially sharpened following SSS application, indicative of an increase in signal to noise ratio. …
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Talking Statues: An Italian Communicative Phenomenon from the Renaissance to the Present Day
… the writings affixed to it, termed pasquinades, spread this communicative practice to other statues in Rome and across the Italian Peninsula. Pasquino has also played an important role as a news source for informants to collect and disseminate pasquinades in emerging communication mediums. …
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We are what we attend to: Individual differences in attention and personality
… how visual attention is calibrated in terms of spatial scope (spatial spread) and selectivity (biased enhancement of relevant and suppression of irrelevant information). While the influence of exogenous factors on visual attention has been studied widely, the relationship between endogenous …
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Laser-Produced Plasmas for Particle Acceleration
… important parameters, such as relative energy spread and divergence, of the resulting particle beams, which is important for future applications. By using smart target designs, it is possible to reduce both the spectral and spatial spread of laser wakefield accelerated electrons. In the …
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Global dynamics of Bordetella pertussis and implications for control
… millions of individuals annually despite widespread vaccination. This is particularly problematic in neonates, where infection can lead to death. Endemicity, subclinical infections and circulation of multiple lineages hide the underlying dynamics of *Bordetella pertussis* from surveillance …
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Using Plant Epidemiological Methods to Track Computer Network Worms
… possible approach is outlined for predicting the spatial flow of a worm within the local area network (LAN). The approach in this research is based on the application of mathematical models and variables inherent in plant epidemiology. In particular, spatial autocorrelation has been identified as …
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Novel Use of Dual Anti-Inflammatory Therapy to Overcome Drug Resistance and Improve Functional Recovery Following Spinal Cord Injury
… following SCI.</p> <p>We observed a progressive, spatial spread of Pgp overexpression within the injured spinal cord. To assess Pgp function, we examined spinal cord uptake of systemically-delivered riluzole, a drug that is currently being evaluated in clinical trials as an SCI intervention. …
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Development of image processing systems for cosmic ray effect analysis
… terms of charge inducing capabilities and event spatial characteristics. The effects of dissimilar neutron spectra in two pseudo-atmospheric neutron beams are demonstrated. The CCD data are used to measure neutron fluence at different locations along and across beam lines. Calibrating the …
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NAPL (Non Aqueous Phase Liquid) source characterization based on dissolved contaminant concentrations
… contamination frequently originates from spatially distributed sources of Non-Aqueous Phase Liquids (NAPLs). Such chemicals are typically persistent sources of groundwater contamination that are difficult to characterize. This work addresses the feasibility of using dissolved concentration …
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Intrinsic Optical Imaging of Cortex During Deep Brain Stimulation: Parameters, Spatiotemporal Dynamics and Neurovascular Coupling
… cortex perfusion in rodents. The temporal and spatial dynamics of perfusion were dependent on the parameters of DBS. 'Maximum change in reflectance' and its spatial spread (two measures of hemodynamic response) increased linearly with increases in current amplitude or pulse width and had a …
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