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 3 of 3 for “"reproduction ratio"”.
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Mathematical analysis of tuberculosis models with differential infectivity, general contact rates, migration and staged progression
… 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, the spread of tuberculosis is studied …
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Current status of the scale insect fauna of citrus in Tunisia and biological studies on Parlatoria ziziphi (Lucas)
… intrinsic rate of increase (rm), the mean generation time (T0) and the net reproduction ratio (R0)) of the black scale were assessed. From surveys conducted in the main citrus growing regions located in the northern part of Tunisia, a total of 84 samples were collected and over 200 …
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Towards bioengineered ecosystems: Three studies in invasion biology
… predict population density, pH, lactate concentration, and maltose concentration in a manner consistent with experimental data. Chapter 3 considers the general problem of invasion in a three-species ecosystem, which was simulated mathematically assuming that the community structure of the …