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 20 of 44 for “"R0"”.
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Search for CP violation in D-meson decays
… the branching ratio for the decay, no -+ K-?r+?r0 ?r0 ?r0 , for which evidence was found in the process of measuring Acp, is set at 12.1%.
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Centre Manifold Theory for some continuous and Discrete Epidemiological models
… in terms of the basic reproduction number R0. This is defined as the average number of secondary infections that occur when one infective is introduced into a susceptible host population. In this setting and for many diseases, the prediction of the likelihood of persistence or dying out of …
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Singularly nonautonomous semilinear evolution equations with almost sectorial operators
… type of domain consists in a subset of RN, 0 = [ R0, where is an open set of RN and R0 is diffeomorphic to a subset (0; 1) R. The “handle” refers to this line segment R0 attached to . In 0 we consider the following reaction-diffusion equation [equation]. This equation generates a singularly …
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Epidemiological model of the transmission and spread of Hepatitis B pandemic in Ghana
… model has an epidemiological threshold parameter R0 which is defined as the expected proportion of secondary infections generated as a result of introducing a single infected individual into the population. When R0 ≤1 the disease-free equilibrium state is globally asymptotically stable whilst the …
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Mathematical modelling to investigate the impact of awareness programs on the spread of HIV/AIDS amongst people who inject drugs (PWIDs)
… results. The fundamental reproduction number R0, an essential factor in our work, has a formula that we determine. If R0 is greater than one, there are two steady states: one without disease and one with it. Additionally, we demonstrated that the disease-free equilibrium point is locally …
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Mathematical modeling of foot and mouth disease (FMD) in Cattle and Buffaloes using vaccination and culling: A Namibia perspective
… shown to be locally asymptotically stable when R0 < 1 and unstable when R0 > 1. The endemic equilibrium point was shown to exist when R0 > 1 and globally stable when R0 > 1. Numerical simulation results, using Namibia data relevant to the transmission dynamics of FMD, were presented to …
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A Multi-level Model for a Vector-Borne Organ to Tissue life Cycle Dynamics
… We also compute the basic reproduction number R0 for both models and use the R0 to determine the local and global stability of the disease-free equilibriumas well as the local stability of endemic equilibrium of both models, respectively. We demonstrate that if R0 < 1, then the diseasefree …
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Mathematical models for Tuberculosis spread in humans
… results show that for the first model, R0 > 1; implying that the disease-free equilibrium is unstable. For the second model, however, R0 < 1; indicating that the disease-free equilibrium is a stable steady state and that in case of an outbreak, the disease will not spread. Simulation …
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Η θέση της πλήρους προεγχειρητικής χημειοθεραπείας σε οριακά εξαιρέσιμα νεοπλάσματα παγκρέατος
… στελέχη μειώνει την πιθανότητα επίτευξης R0 εκτομής. Για τις ανάγκες της μελέτης πραγματοποιήθηκε ανασκόπηση της διεθνούς βιβλιογραφίας μέσω PubMed, Scopus και Cochrane Database, με έμφαση σε νεότερες δημοσιεύσεις, κλινικές μελέτες και διεθνείς κατευθυντήριες οδηγίες. Τα διαθέσιμα δεδομένα …
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Studies of the oxidation of zinc dialkyldithiophosphates and related compounds
Raman spectroscopic analysis of Zn[(R0)2 PS2]2 (ZDDP) and Pb[(RO)2 PS2]2 (R=ethyl or n-butyl) indicate that four sulphur atoms co-ordinate to each zinc atom whilst only two co-ordinate to each lead atom. Dialkyl dithiophosphoric arids (RO)2P(:S)SH exhibit rotational isomerism about P-S and P-0 …
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Simulation of the ATLAS ITk strip endcap modules for testbeam reconstruction and analysis
… for one of the ITk strip endcap sensors, the R0 module, in the simulation software of Allpix and the reconstruction software of EUTelescope. Included in this work is the simulation of the propagation of the charge deposited in the sensor by the beam. The simulated data, as well as data from …
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Modeling Temperature Effects on Vector-Borne Disease Dynamics
… effect it has on the basic reproductive ratio R0, a measure of how contagious the disease is. I use R0 to determine disease risk. For dengue, my results show that using mosquito life stage traits response to temperature improves our vector density approximation and disease risk estimates. For …
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Infection processes on networks with structural uncertainty
… and meaning of the basic reproductive ratio, R0. We quantify the incorporation of population structure into this general framework, and identify conditions under which interaction topology and infection characteristics can be decoupled in the computation of threshold functions, which …
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Network modelling for sexually transmitted diseases
… quantities of interest, the threshold parameter (R0) and the probability of extinction. In order to study the endemic level, it is helpful to use the deterministic (ODE) approximation of the stochastic SIS epidemic. The behaviour about the endemic equilibrium is studied using an Ornstein-Uhlenbeck …
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Discrete epidemic models with arbitrarily distributed disease stages
… approach to derive analytic expressions for R0 and RC. In Chapter 3 we develop and analyze of a model with quarantine and isolation when arbitrarily distributed disease stages are incorporated. The results obtained in the general framework are then applied to models with specific …
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Multi-scale and multi-group modeling techniques applied to Cholera and COVID-19
… are discussed in light of the number R0, when applicable, as well as the existence and uniqueness of a positive EE (Endemic Equilibrium). The conditions needed to achieve local and global stability in each system are reviewed, and numerical simulations are presented to supplement these …
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Raman, Infrared and Microwave Spectra, Conformational Stability, R₀ Structural Parameters and Vibrational Assignments of Some Organoamines, Organophosphines, Alcohols And Substituted Four And Five Membered Rings
… stability determination and adjusted r0 parameters have been obtained for each of the most stable conformers and in some cases for the less stable conformers. The vibrational assignments were supported by normal coordinate calculations with scaled force constant from MP2(full)/6-31G(d) …
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Lyapunovfunctions in epidemiological modeling
… 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 equilibrium. The results indicate that the disease-free equilibrium is globally asymptotically …
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Maintaining pathogens with short infectivity in seasonally structured tick populations: relative importance of three transmission pathways
… the next generation matrix method to calculate R0 and performed elasticity analyses for complex disease systems. We found that cofeeding transmission is a critically important route for such pathogens to persist in seasonal tick populations over the reasonable range of parameter values. At …
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Understanding transmission and control of Cystic Echinococcosis and other taeniid infections in the Falkland Islands
… estimating the basic reproduction number (R0) for the parasite, and identifying scenarios where this estimate increased above one suggesting continued transmission could occur. Seven scenarios where lapses in control measures could result in the R0 estimate increasing above one and …
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