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.
Results
Showing 1 to 12 of 12 for “"contact rates"”.
-
Mathematical analysis of tuberculosis models with differential infectivity, general contact rates, migration and staged progression
… features of tuberculosis dynamics (variable contact rates, differential infectivity, migration and staged progression. The first model under consideration covers the general contact rates and differential infectivity. The second model explores migration and staged progression. In this model, …
-
Integrating bioenergetics and foraging behavior : the physiological ecology of larval cod (Gadus morhua)
… strategies predict that when predator-prey contact rates are high, the greatest net energy gain is realized with short pause durations. When predator-prey contact rates are low, larvae should achieve greater net energy gains by remaining at rest for extended periods. Larvae observed foraging …
-
Assessment of the impact of awareness programs on the transmission dynamics of COVID-19
… in modeling disease prevalence depending on contact rates for direct and indirect transmissions and infectious host shedding. The model is also applied to reported data from Wuhan and the state of Tennessee. Our results imply that applying strategically created awareness programs to a …
-
Determining the role of density-dependent effects in disease induced population impacts
… densities to be effective. Density-dependent contact rates are generally assumed to be the mechanism driving these decline patterns. However, other density-dependent processes that influence transmission probability could also influence mortality in a density-dependent manner. Here we examine …
-
Evaluation of different powdered activated carbons in the control of chlorite ion
… removal was most rapid in the first two hours of contact, but slowed to rates below 6 percent per hour after 4 hours of contact. Rates of ClO₂⁻ removal varied with PAC type. The overall rate of ClO₂⁻ removal was also slower, with the total percentage of ClO₂⁻ removal less, when chlorine was …
-
Multi-scale Transmission Ecology: How Individual Host Characteristics, Host Population Density, and Community Structure Influence Transmission in a Multi-host Snail Symbiont System
… and community-levels that influence host contact rates or symbiont transmission success in a common snail-symbiont system, providing a detailed description of the multi-faceted nature of symbiont transmission. From a review of the ecological literature, I found that most models assume that …
-
Microbial Evolution In Sea Ice: Communities To Genes
… (up to 2820), with predicted virus-to-bacteria contact rates up to 844× those expected in the underlying seawater. In Chapter 4 a comparative analysis of the genome of a model psychrophilic γ- proteobacterium, Colwellia psychrerythraea strain 34H, was used to examine the potential for the …
-
Aggregation, courtship, and behavioral interactions in European earwigs, Forficula auricularia L. (Dermaptera: Forficulidae)
… Social behaviors (communal feeding, aggression, contact, and dorsal palpation) comprised <10% of the insect's behavioral repertoire. Since dorsal palpation, a previously undescribed behavior and a form of allogrooming, occurred more frequently during reproductive periods, it may have a sexual …
-
Monitoring for Chronic Wasting Disease in Mule Deer and White-Tailed Deer at Wind Cave National Park: Investigating an Emerging Epizootic
… 2) evaluate home-range overlap and direct contacts for potential transmission of CWD; 3) determine probabilities of detection and death related to CWD from deer mortalities; and 4) examine sample size and smoothing parameters on home ranges from GPS collars on home ranges for mule deer and …
-
Modelling the South African tuberculosis epidemic: the effect of HIV, sex differences, and the impact of interventions
… diabetes, health-seeking patterns, social contact rates and TB treatment discontinuation. The third objective is to project the future impact of increasing screening, improving linkage to TB care and retention, increasing preventative therapy, and reducing ART interruptions. An age- and …
-
Heart failure and chronic obstructive pulmonary disease: common partners, common problems
… greatest in the most deprived. Consultation rates for HF or COPD in those with both conditions were greater than disease specific contact rates in patients with either condition alone. Cardiovascular comorbidity was similar in HF patients with and without COPD, despite differences in smoking …
-
Variations of Wildlife Safety Crossings and Their Effects for Mule Deer in Northeast Nevada
… structures on U.S. Highway 93 between Wells and Contact, Nevada. Two sites were selected based on known migration routes of mule deer and state reports of deer-vehicle collisions. Construction of the first set of safety crossings, located approximately 16 km north of Wells, was completed in …