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 21 for “"SEIR"”.
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A SEIR-based ADC built-in-self-test and its application in ADC self-calibration
… The stimulus error identification and removal (SEIR) method has greatly reduced the linearity requirement. However, it requires a highly stable voltage offset, which remains a daunting task. This work exploits the inherit capacitive sample-and-hold circuit used in various ADC architectures to …
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Markovian and stochastic differential equation based approaches to computer virus propagation dynamics and some models for survival distributions
… susceptible-exposed-infectious- recovered (SEIR) models are specifically explored for the propagation of computer virus over the Internet by borrowing ideas from mathematical epidemiology. Large computer networks such as the Internet have become essential in today's technological societies …
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Tuberkuliozės matematinis modelis su netiesine gydymo funkcija /
… treatment function. In this thesis SIR and SEIR tuberculosis models which include a saturated treatment function are studied. It is beneficial to include a saturated treatment in developing countries because medical conditions can be poor. The local and global stability of the equilibrium …
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Incorporating the Pre-symptomatic Stage in the Discrete-Time Kermack-McKendrick Model
… was further included in the recent discrete-time SEIR KM27 Model formulated in Diekmann (2021). With discrete-time models being general, flexible when including public health interventions and easier to implement computationally than continuous-time models, it is a powerful tool for exploring …
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Mathematical model for tripledemic disease (COVID-19, RSV, and Influenza)
… and SusceptibleExposed-Infectious-Recovered (SEIR) mathematical models to estimate transmission rates, compute the basic reproduction number, forecast infections, and analyze seasonal variations and comparative transmission dynamics among the three diseases. Our models are applied to seasonal …
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Technology's impact on student learning in grades K-8
… Regional Technology in Education Consortium (SEIR*TEC) was used to collect data from students and teachers. An analysis of the data found that the district goals and objectives were being met with the integration of technology into the curriculum and instruction. Technology as a tool was used …
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Lyapunovfunctions in epidemiological modeling
… of the basic reproduction number for the SEIR model, and it is shown that the disease-free equilibrium is locally asymptotically stable ifR0 <1, but unstable ifR0 >1. Furthermore, a Lyapunov function is constructed for the Vector-Host model to study the global stability of the disease-free …
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Hybrid methodology for Markovian epidemic models
… of the Susceptible–Exposed–Infectious– Removed (SEIR) model, a generalisation of the SIR CTMC that is more realistic for modelling the initial stage of many outbreaks. Compartmental CTMC models are attractive due to their stochastic individual-to-individual representation of disease transmission. …
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MINING SARS-COV-2 PHYLOGENETIC TREES TO ESTIMATE CIRCULATING INFECTIONS AND PATTERNS OF MIGRATION
… a susceptible-exposed-infectious-recovered (SEIR) model of pathogen spread, reconstructing evolution using CoVizu. For simulations of I, I varied the total number of infections when a final sample was obtained. For simulations of migration rates, I simulated independent groups of infections …
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Advancing Emergency Department Efficiency, Infectious Disease Management at Mass Gatherings, and Self-Efficacy Through Data Science and Dynamic Modeling
… dynamics simulations to develop a modified SEIR model for modeling infectious diseases during mass gatherings and assessing the effectiveness of commonly implemented policies. The results demonstrated the significant collective impact of interventions such as visitor limits, vaccination …
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Epidemiological model of the transmission and spread of Hepatitis B pandemic in Ghana
… As a contribution, this study employed a SEIR deterministic compartmental model, which incorporates latent period and vertical transmission, to examine the transmission and spread of hepatitis B in the context of the Sub-Saharan Africa with incidence data obtained from Ghana. The SEIR …
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Hybrid modeling techniques to support drug-development and post-market analysis of anti-infectives
… simulations of a multi-group and age-structured SEIR (Susceptible-Exposed-Infected-Recovered) epidemiological model to reconstruct economical tolls of a novel vaccination strategy. In particular, the cost-benefit scenario of the introduction of the adjuvanted QIV (aQIV) vaccine in the elderly …
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Models for managing surge capacity in the face of an influenza epidemic
… Optimization techniques with Epidemiology (SEIR models) and system performance modeling. We describe cutting-plane algorithms analogous to generalized Benders' decomposition that prove fast and numerically accurate. Our results yield insights on the structure of optimal robust strategies and …
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Evaluating pooled testing designs in community and healthcare settings for infectious disease management and in particular for epidemics
… disease transmission pathway (an extended SEIR model) and the testing poli- cies to be evaluated. The thesis details the development of these models and how the modelling has been extended as more has become known of SARS-CoV-2 dynamics. The settings of a small town and a ‘typical’ English …
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A unified computational framework for modeling health policy adoption in complex real-world environments
… behavioral model and a standard epidemiological (SEIR) model. By making the disease transmission rate a dynamic function of the population's evolving risk perception, the integrated model produced significantly more accurate infection trajectory forecasts than the baseline epidemic models. This …
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Discrete epidemic models with arbitrarily distributed disease stages
… motivation for this work. In Chapter 2 several SEIR-type models with arbitrarily distributed infectious period are introduced and analyzed. This chapter focuses on the use of the next generation matrix approach to derive analytic expressions for R0 and RC. In Chapter 3 we develop and analyze of …
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Computational Cost Analysis of Large-Scale Agent-Based Epidemic Simulations
… the Susceptible-Exposed-Infectious-Recovered (SEIR) models. This model allows the study of complex systems as they interact, thus enabling researchers to model and observe the socio-technical trends and forces. Pandemic planning at the world level requires simulation of over 6 billion agents, …
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Observer Design for Non-Monotonic Nonlinear Systems and Interesting Contemporary Applications
… model is developed to enhance the traditional SEIR epidemic model to include additional variables. Subsequently, a cascaded observer is developed to estimate the real-time values of the infection rate, and the basic reproduction number of COVID-19 spread in Minnesota. Finally, the use of the …
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Host heterogeneity and respiratory disease dynamics: From structural inequity to immune history
Host heterogeneity is a core driver of infectious disease dynamics and has been widely explored in ecology and evolution. However, in human populations, social inequity remains underexplored as a source of heterogeneity despite having long been identified as a threat to global health and infectious …
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