View All Items
(41 - 49 of 49)
Pages
- Title
- Tobacco Prevention and Cessation Policies and Youth Tobacco Use in Florida Public Schools.
- Creator
-
Terry, Amanda, Zhang, Ning, Martin, Lawrence, Gammonley, Denise, Delnevo, Cristine, University of Central Florida
- Abstract / Description
-
Tobacco use is the leading cause of preventable disease and premature death in the United States. In 2014, an estimated 16.8% of adults were current cigarette smokers, and 9.2% of high school students smoked cigarettes. Nearly 90% of smokers developed their habit as teenagers, and students' tobacco use in high school influences their behaviors later in adulthood. Smoking behaviors appear to be inseparable from the social environment, physical environment, small social groups, and cognitive...
Show moreTobacco use is the leading cause of preventable disease and premature death in the United States. In 2014, an estimated 16.8% of adults were current cigarette smokers, and 9.2% of high school students smoked cigarettes. Nearly 90% of smokers developed their habit as teenagers, and students' tobacco use in high school influences their behaviors later in adulthood. Smoking behaviors appear to be inseparable from the social environment, physical environment, small social groups, and cognitive and affective processes. Preventive strategies, such as advertising bans, clean indoor air laws, education programs, increased taxes, labeling limitations, mass-media campaigns, and youth access regulations, have been commonly used to prevent and reduce youth tobacco use nationwide. In Florida, local public school districts were authorized to develop new tobacco-free school policies through an amendment to the Florida Clean Indoor Air Act in June 2011. The purpose of this study was to determine the impact of the recently implemented smoking cessation policies, as well as individual-level factors and interpersonal-level factors, on youth tobacco use in Florida public schools. This study employed a pooled cross-sectional design with data for high school students from the Florida Youth Tobacco Survey (FYTS) in 2010 (n=37,797) and 2014 (n=32,930). It was guided by a theoretical framework based on the reasoned action approach and the social ecological model. Hierarchical logistic regression was used to analyze the data. The four models were binary logistic regression for cigarette use, multinomial logistic regression for cigarette use, binary logistic regression for cigar use, and multinomial logistic regression for cigar use. The results of this study support the importance of the individual-level constructs of background factors, behavioral beliefs, and control beliefs, the interpersonal-level construct of normative beliefs, and the policy-level construct of actual behavioral control when applied to youth tobacco use. These findings led to a better understanding of which policies, environments, and cognitions contribute to preventing and reducing teenage tobacco use, which is imperative in controlling the risks related to smoking and improving youth health. Now that the individual-level factors, interpersonal-level factors, and policy-level factors that contribute to youth tobacco use were recognized, preventative and therapeutic programs and interventions can be suggested and improved. This study provided evidence-based knowledge for improving public policies and interventional strategies towards smoking prevention and cessation for youth.
Show less - Date Issued
- 2016
- Identifier
- CFE0006188, ucf:51128
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006188
- Title
- Effects of mechanical habitat disturbance on the diversity and network structure of plant-bee interaction networks in Central Florida.
- Creator
-
Carman, Karlie, Hinkle, Ross, Jenkins, David, King, Joshua, University of Central Florida
- Abstract / Description
-
Ecological interactions within a community shape the structure of ecosystems and influence ecosystem function. Plant-pollinator interactions exist as mutualistic exchange networks that may collapse as habitat loss occurs, thereby threatening the overall health of an ecosystem. Understanding the impacts of human-mediated habitat disturbance on ecological interactions is therefore crucial for conservation efforts. Archbold Biological Station (ABS) in Venus, Florida contains over 2000 hectares...
Show moreEcological interactions within a community shape the structure of ecosystems and influence ecosystem function. Plant-pollinator interactions exist as mutualistic exchange networks that may collapse as habitat loss occurs, thereby threatening the overall health of an ecosystem. Understanding the impacts of human-mediated habitat disturbance on ecological interactions is therefore crucial for conservation efforts. Archbold Biological Station (ABS) in Venus, Florida contains over 2000 hectares of protected Florida scrub habitat nested within a human-dominated environment that is threatened by anthropogenic habitat disturbance. In past studies, over 113 bee species and 157 associated host plants, many endemic to the Lake Wales Ridge, have been found on ABS property, providing an understanding of this system's plant-bee network. Using those data as a baseline, this study investigated the effects of varying levels of mechanical habitat disturbance intensity on the diversity and network structure of plant-bee interaction networks. Flowering plant abundance, richness, diversity, and composition as well as bee abundance and composition were significantly different across mechanical habitat disturbance levels. Interactions between bees and flowering plants also differed with varying disturbance intensity. From these results, it is clear that plants, bees and interactions between them are impacted by mechanical habitat disturbance in this system. This project informs management efforts not only for natural systems with the threat of alteration, but also for agricultural systems, many of which heavily rely on flower visitation by bee pollinators. This research also contributes to the growing field of interaction ecology by increasing understanding of habitat alteration effects on a valuable ecological interaction and ultimately ecosystem function.
Show less - Date Issued
- 2014
- Identifier
- CFE0005311, ucf:50505
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005311
- Title
- Physiological Constraints on Warm-Water Habitat Site Selection and Utilization by the Florida Manatee (Trichechus manatus latirostris) in East Central Florida.
- Creator
-
Spellman, Ann, Worthy, Graham, Noss, Reed, Hinkle, Ross, DeFreese, Duane, University of Central Florida
- Abstract / Description
-
Living at the northern limits of its geographic range, the Florida manatee is particularly susceptible to cold stress-related mortality during the winter months, with most deaths occurring in the lower two-thirds of the state. Contributing to this cold stress susceptibility is the manatee's limited physiological and behavioral responses available when thermally stressed. While capable of migrating south in response to falling water temperatures, manatees must still find warm water when...
Show moreLiving at the northern limits of its geographic range, the Florida manatee is particularly susceptible to cold stress-related mortality during the winter months, with most deaths occurring in the lower two-thirds of the state. Contributing to this cold stress susceptibility is the manatee's limited physiological and behavioral responses available when thermally stressed. While capable of migrating south in response to falling water temperatures, manatees must still find warm water when ambient river temperature drops below 20(&)deg;C for more than a few days. This is in part due to the species low metabolic rate, limited capacity for thermogenesis, and limited ability to raise its metabolic rate. Prolonged exposure to cold temperatures may result in cold stress syndrome, which involves a number of potentially life-threatening, if not fatal physiological changes. Survival during the winter months is therefore, dependent upon the manatee's ability to balance basic physiological needs, primarily the need to forage and to obtain fresh water with the need to stay warm.When identifying which animals are most susceptible and where, analyses of statewide manatee mortality records from 1996 through 2011 (n = 823) indicated that, size and location matter. Medium to large-sized calves accounted for the majority of documented death from cold stress (46.6%), while subadults and small calves were the least represented size classes (14.3 % and 9.5%, respectively). Adults slightly outnumbered subadults (15.8%). Males outnumbered females in all size classes but gender differences were not statistically significant. With regards to location, two areas of the state, the southwest and central east coasts showed the highest incidents of cold stress-related mortality. Both are regions with no primary, natural warm-water springs and whose principal warm-water refugia are power plant effluents. Brevard County on the central east coast is the area most at risk during cold weather events accounting for more than 25% of all cold stress deaths statewide. Warm-water sites within this region are few and relatively underrepresented in the literature in an area well-studied in terms of manatee abundance and distribution relative to the operational power plant. Results from cold stress data analyses emphasize the importance of identifying and characterizing the physical attributes of both known and suspected secondary warm-sites used by manatees in this region for both long and short term protection of the species, and its critical habitat.Three locations within Brevard County identified as passive thermal basins (PTBs), and classified as secondary warm-water sites, have been documented supporting in excess of 100 manatees on numerous occasions, and during winters of varying severity. Unique in physical appearance, distance to forage, hydrology including thermal profiles, and when it was used by manatees, each site challenged the accepted definitions and criteria of what constitutes an acceptable and appropriate warm-water site.Through analyses of photo-identification records, site fidelity at two of these warm-water sites, the Berkeley Canal and the Desoto Canal, was established for a minimum of 20 highly identifiable animals, 15 of which used adjacent sites within the same year, and 6 that used both sites but during different years. Observations of daily use patterns within the sites supported optimization of thermoregulation through adjustments in both vertical and horizontal movement, the latter of which seemed to follow the path of the sun. Manatees using the sites also made use of bottom sediment presumably to stay warm at all three locations. Temperature data indicated that water temperatures monitored in the sediment at secondary sites were some of the highest in the county. The predictable movements during all but the coldest weather fronts indicated that manatees utilized these sites during the early morning and afternoon hours when ambient river temperatures were coldest, gradually returning to the river to feed as ambient temperatures began to rise later in the afternoon.The availability of PTBs in proximity to primary warm-water sites within the region may provide an important component needed for manatees to successfully balance the need to forage with the need to stay warm by providing a network that allows for more efficient foraging while reducing exposure to sub-critical ambient river temperatures. The challenge of balancing the need to forage and to maintain homeostasis in the face of thermal stress is complex. This complexity was best approached and better understood through use of a manatee energetics model. The model was designed to facilitate simulation of an unlimited number of different case scenarios involving the exposure of virtually created manatees to a variety of winter conditions as might be experienced by real manatees in a natural system. Sixty-four different simulations were run using six virtual manatees of differing ages, gender, physical parameters, and knowledge of warm-water sites. Simulations were conducted using actual winter water temperature data from Brevard secondary sites and the ambient river from both a mild and a severe winter season. Outcomes, measured as changes in physical parameters indicative of body condition (i.e. mass, percent body fat, blubber depth, girths, etc.), showed that all else being equal, calves in the 2 year-old range fared poorly in all scenarios when compared to individuals of larger size. Subadults fared better than larger adults. This outcome illustrates the complex relationship between size, energy requirements and the synergistic effects of body mass, body fat and blubber thickness on SA:V ratio. Model outcomes agree closely with manatee cold stress mortality analyses predicting that medium to large-sized calves are most susceptible to CS, followed by adults, then subadults.Because all models are simplifications of complex systems, the manatee energetics model is not without its flaws and limitations. The current version of the model could not predict the point at which cold stress mortality would occur. However, a cold stress warning system incorporated into the design alerts the user if potential CSS is likely based on changing physical parameters. Another limitation was the inability of the model to account for the behavioral plasticity of individual subjects since virtual manatees respond to water temperatures based on the user defined rules. A number of additional limitations related to gaps in existing manatee data the gaps were identified and defined. Despite these gaps, the model is designed to allow for incorporation of additional interactions, feedback loops and relevant data as it becomes available and as additional physiological interactions and energy requirements are more clearly defined. Sensitivity analyses, a feature of the model that allowed for modifications in a number of physical as well as environmental parameters, provided an otherwise unlikely opportunity to see how incremental changes in input values, specifically the starting values for mass, percent body fat and blubber depth affected the model's outcome. Ultimately the goal of the model was to facilitate a better understanding of complex relationships by challenging our preconceived understanding of the manatee and its environment
Show less - Date Issued
- 2014
- Identifier
- CFE0005419, ucf:50428
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005419
- Title
- Habitat selection in transformed landscapes and the role of novel ecosystems for native species persistence.
- Creator
-
Sanchez Clavijo, Lina, Quintana-Ascencio, Pedro, Noss, Reed, Weishampel, John, Rodewald, Amanda, University of Central Florida
- Abstract / Description
-
To understand native species persistence in transformed landscapes we must evaluate how individual behaviors interact with landscape structure through ecological processes such as habitat selection. Rapid, widespread landscape transformation may lead to a mismatch between habitat preference and quality, a phenomenon known as ecological traps that can have negative outcomes for populations. I applied this framework to the study of birds inhabiting landscapes dominated by forest remnants and...
Show moreTo understand native species persistence in transformed landscapes we must evaluate how individual behaviors interact with landscape structure through ecological processes such as habitat selection. Rapid, widespread landscape transformation may lead to a mismatch between habitat preference and quality, a phenomenon known as ecological traps that can have negative outcomes for populations. I applied this framework to the study of birds inhabiting landscapes dominated by forest remnants and shade coffee plantations, a tropical agroforestry system that retains important portions of native biodiversity. I used two different approaches to answer the question: What is the role of habitat selection in the adaptation of native species to transformed landscapes? First, I present the results of a simulation model used to evaluate the effects of landscape structure on population dynamics of a hypothetical species under two mechanisms of habitat selection. Then I present the analyses of seven years of capture-mark-recapture and resight data collected to compare habitat preference and quality between shade coffee and forest for twelve resident bird species in the Sierra Nevada de Santa Marta (Colombia). I provide evidence for the importance of including the landscape context in the evaluation of ecological traps and for using long-term demographic data when evaluating the potential of novel ecosystems and intermediately-modified habitats for biodiversity conservation. Beyond suggestions to improve bird conservation in shade coffee, my findings contribute to theory about ecological traps and can be applied to understand population processes in a wide variety of heterogeneous landscapes.
Show less - Date Issued
- 2016
- Identifier
- CFE0006494, ucf:51392
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006494
- Title
- Tractors and Genres: Knowledge-Making and Identity Formation in an Agricultural Community.
- Creator
-
Galbreath, Marcy, Scott, Blake, Murphy, Patrick, Rounsaville, Angela, Lester, Connie, University of Central Florida
- Abstract / Description
-
This research examines the history of a small Florida agricultural community over the course of the twentieth century from a rhetorical perspective in order to understand the technological and communicative transitions that governed the development of American agricultural production. By examining archival and oral histories, this research will add to our understandings of how written and oral communications temper the relationships and social situations of an agricultural community,...
Show moreThis research examines the history of a small Florida agricultural community over the course of the twentieth century from a rhetorical perspective in order to understand the technological and communicative transitions that governed the development of American agricultural production. By examining archival and oral histories, this research will add to our understandings of how written and oral communications temper the relationships and social situations of an agricultural community, including the knowledge-making and technological adaptation resulting from communications within the community and with outside institutions and entities. Agricultural villages are not isolated entities, but rather sites of multiple rhetorical situations, and farmers do not farm alone, but inside an ecosystem of networked knowledges, practices, and traditions. Thus, the history of a singular farming community may serve as a rhetorical microcosm of modern American agriculture's evolution over the course of the twentieth century, and provide some mindfulness concerning the social, technological, and natural ecologies that act and interact within modern farming communities. This dissertation will use rhetorical genre theory and ideas of local literacies to examine the written and oral discourses that run through these ecologies for the purpose of tracing the relationships between the sponsors of agricultural ideas and technologies and the local farmers who interpreted, employed, and modified them. In addition, this project purports to add to digital history-making research through the construction of an historical archival website to which community members can add their voices. The Samsula Historical Archive creates an online nexus where community members can document, organize, and preserve the history of the community, offering a portal supporting multiple narratives and perspectives. Each family has its own stories and perspectives on historical happenings; by bringing these together in one databased location, the layers and interconnections will become clearer and perhaps stimulate further memories and insights. A discussion of the rhetorical choices faced in constructing such an artifact may also help future researchers embarking on such a project.
Show less - Date Issued
- 2014
- Identifier
- CFE0005495, ucf:50347
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005495
- Title
- A Holistic Analysis of the Long-Term Challenges (&) Potential Benefits of the Green Roof, Solar PV Roofing, and GRIPV Roofing Markets in Orlando, Florida.
- Creator
-
Kelly, Carolina, Tatari, Omer, Oloufa, Amr, Mayo, Talea, Zheng, Qipeng, University of Central Florida
- Abstract / Description
-
Green roofs and roof-mounted solar PV arrays have a wide range of environmental and economic benefits, including significantly longer roof lifetimes, reductions in urban runoff, mitigation of the urban heat island (UHI) effect, reduced electricity demand and energy dependence, and/or reduced emissions of greenhouse gases (GHGs) and other harmful pollutants from the electricity generation sector. Consequently, green roofs and solar panels have both become increasingly popular worldwide, and...
Show moreGreen roofs and roof-mounted solar PV arrays have a wide range of environmental and economic benefits, including significantly longer roof lifetimes, reductions in urban runoff, mitigation of the urban heat island (UHI) effect, reduced electricity demand and energy dependence, and/or reduced emissions of greenhouse gases (GHGs) and other harmful pollutants from the electricity generation sector. Consequently, green roofs and solar panels have both become increasingly popular worldwide, and promising new research has emerged for their potential combination in Green Roof Integrated Photovoltaic (GRIPV) roofing applications. However, due to policy resistance, these alternatives still have marginal market shares in the U.S., while GRIPV research and development is still severely limited today. As a result, these options are not yet sufficiently widespread in the United States as to realize their full potential, particularly due to a variety of policy resistance effects with respect to each specific alternative. The steps in the System Dynamics (SD) methodology to be used in this study are summarized as follows. First, based on a comprehensive review of relevant literature, a causal loop diagram (CLD) will be drawn to provide a conceptual illustration of the modeled system. Second, based on the feedback relationships observed in this CLD, a stock-flow diagram (SFD) will be developed to form a quantitative model. Third, the modeled SFD will be tested thoroughly to ensure its structural and behavioral validity with respect to the modeled system in reality using whatever real world data is available. Fourth, different policy scenarios will be simulated within the model to evaluate their long-term effectiveness. Fifth, uncertainty analyses will be performed to evaluate the inherent uncertainties associated with the analyses in this study. Finally, the results observed for the analyses in this study and possible future research steps will be discussed and compared as appropriate.
Show less - Date Issued
- 2018
- Identifier
- CFE0007406, ucf:52741
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007406
- Title
- Evolution and distribution of phenotypic diversity in the venom of Mojave Rattlesnakes (Crotalus scutulatus).
- Creator
-
Strickland, Jason, Savage, Anna, Parkinson, Christopher, Hoffman, Eric, Rokyta, Darin, University of Central Florida
- Abstract / Description
-
Intraspecific phenotype diversity allows for local adaption and the ability for species to respond to changing environmental conditions, enhancing survivability. Phenotypic variation could be stochastic, genetically based, and/or the result of different environmental conditions. Mojave Rattlesnakes, Crotalus scutulatus, are known to have high intraspecific venom variation, but the geographic extent of the variation and factors influencing venom evolution are poorly understood. Three primary...
Show moreIntraspecific phenotype diversity allows for local adaption and the ability for species to respond to changing environmental conditions, enhancing survivability. Phenotypic variation could be stochastic, genetically based, and/or the result of different environmental conditions. Mojave Rattlesnakes, Crotalus scutulatus, are known to have high intraspecific venom variation, but the geographic extent of the variation and factors influencing venom evolution are poorly understood. Three primary venom types have been described in this species based on the presence (Type A) or absence (Type B) of a neurotoxic phospholipase A2 called Mojave toxin and an inverse relationship with the presence of snake venom metalloproteinases (SVMPs). Individuals that contain both Mojave toxin and SVMPs, although rare, are the third, and designated Type A + B. I sought to describe the proteomic and transcriptomic venom diversity of C. scutulatus across its range and test whether diversity was correlated with genetic or environmental differences. This study includes the highest geographic sampling of Mojave Rattlesnakes and includes the most venom-gland transcriptomes known for one species. Of the four mitochondrial lineages known, only one was monophyletic for venom type. Environmental variables poorly correlated with the phenotypes. Variability in toxin and toxin family composition of venom transcriptomes was largely due to differences in transcript expression. Four of 19 toxin families identified in C. scutulatus account for the majority of differences in toxin number and expression variation. I was able to determine that the toxins primarily responsible for venom types are inherited in a Mendelian fashion and that toxin expression is additive when comparing heterozygotes and homozygotes. Using the genetics to define venom type is more informative and the Type A + B phenotype is not unique, but rather heterozygous for the PLA2 and/or SVMP alleles. Intraspecific venom variation in C. scutulatus highlights the need for fine scale ecological and natural history information to understand how phenotypic diversity is generated and maintained geographically through time.
Show less - Date Issued
- 2018
- Identifier
- CFE0007252, ucf:52198
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007252
- Title
- Social Disorganization and Florida Public High School Academic Performance.
- Creator
-
Kanaan, David, Wan, Thomas, Wolf, Ross, Stevenson, Robyne, Mitchell, David, University of Central Florida
- Abstract / Description
-
Failing public high schools are a perpetual limitation to community sustainability. Conversely, economically disadvantaged communities more often produce schools with reduced academic performance. Unfortunately, comprehensive community-based remedies are generally outside the scope of a school district's control. Social disorganization theory attributes variations in crime and delinquency to a breakdown in communal structure and relationships. Applied in a similar manner, social...
Show moreFailing public high schools are a perpetual limitation to community sustainability. Conversely, economically disadvantaged communities more often produce schools with reduced academic performance. Unfortunately, comprehensive community-based remedies are generally outside the scope of a school district's control. Social disorganization theory attributes variations in crime and delinquency to a breakdown in communal structure and relationships. Applied in a similar manner, social disorganization has also been associated with lower student achievement.This research examined how social disorganization is associated with Florida public high school academic performance in a two phase analysis at the community and school district levels. In addition, the research tested a potential moderating effect of receiving the Five Star School Award, recognizing family and community involvement, and Florida public high school academic performance with social disorganization factors simultaneously considered. In the first phase, the study used a cross-sectional, non-experimental design analyzing secondary data by structural equation modeling (SEM) at the community-level. For the second phase, the study used a cross-sectional, non-experimental design analyzing aggregated secondary data in multiple linear regressions assessing statistically significant associations between social disorganization predictors and school academic performance variables at the school district-level. SEM analysis found a statistically significant and large negative association between the social disorganization factors residential mobility, single-parent households, socio-economic status and percentage of divorced or separated persons, and Florida public high school academic performance at the community-level. Also at the community-level, results showed that receiving the Five Star School award for satisfying family and community involvement criteria had a statistically significant but small positive association with Florida public high school performance when social disorganization factors were simultaneously considered. At the district or county level, multiple regression analyses found relevant negative associations between social disorganization predictors low median income and ethnic heterogeneity and school district average FCAT scores and Adequate Yearly Progress (AYP) percentages. The study results reinforce existing neighborhood deprivation and social disorganization literature and articulate the need for a community-based approach to improve high school academic performance. Finally, the research suggests prominent education policy reforms may exacerbate social disorganization in communities and proposes alternative policy implementations.
Show less - Date Issued
- 2016
- Identifier
- CFE0006335, ucf:51548
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006335
- Title
- A mathematical model for feral cat ecology with application to disease.
- Creator
-
Sharpe, Jeff, Nevai, A, Shuai, Zhisheng, Qi, Yuanwei, Quintana-Ascencio, Pedro, University of Central Florida
- Abstract / Description
-
We formulate and analyze a mathematical model for feral cats living in an isolated colony. The model contains compartments for kittens, adult females and adult males. Kittens are born at a rate proportional to the population of adult females and mature at equal rates into adult females and adult males. Adults compete with each other in a manner analogous to Lotka-Volterra competition. This competition comes in four forms, classified by gender. Native house cats, and their effects are also...
Show moreWe formulate and analyze a mathematical model for feral cats living in an isolated colony. The model contains compartments for kittens, adult females and adult males. Kittens are born at a rate proportional to the population of adult females and mature at equal rates into adult females and adult males. Adults compete with each other in a manner analogous to Lotka-Volterra competition. This competition comes in four forms, classified by gender. Native house cats, and their effects are also considered, including additional competition and abandonment into the feral population. Control measures are also modeled in the form of per-capita removal rates. We compute the net reproduction number (R_0) for the colony and consider its influence. In the absence of abandonment, if R_0(>)1, the population always persists at a positive equilibrium and if R_0 (<)= 1, the population always tends toward local extinction. This work will be referred to as the core model.The model is then expanded to include a set of colonies (patches) such as those in the core model (this time neglecting the effect of abandonment). Adult females and kittens remain in their native patch while adult males spend a fixed proportion of their time in each patch. Adult females experience competition from both the adult females living in the same patch as well as the visiting adult males. The proportion of adult males in patch j suffer competition from both adult females resident to that patch as well the proportion of adult males also in the patch. We formulate a net reproduction number for each patch (a patch reproduction number) R_j. If R_j(>)1 for at least one patch, then the collective population always persists at some nontrivial (but possibly semitrivial) steady state. We consider the number of possible steady states and their properties. This work will be referred to as the patch model.Finally, the core model is expanded to include the introduction of the feline leukemia virus. Since this disease has many modes of transmission, each of which depends on the host's gender and life-stage, we regard this as a model disease. A basic reproduction number R_0 for the disease is defined and analyzed. Vaccination terms are included and their role in disease propagation is analyzed. Necessary and sufficient conditions are given under which the disease-free equilibrium is stable.
Show less - Date Issued
- 2016
- Identifier
- CFE0006502, ucf:51389
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006502
