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Modeling The Influence Of Environment And Intervention On Cholera In Haiti, Stephen Tennenbaum, Caroline Freitag, Svetlana Roudenko
Modeling The Influence Of Environment And Intervention On Cholera In Haiti, Stephen Tennenbaum, Caroline Freitag, Svetlana Roudenko
Department of Mathematics and Statistics
We propose a simple model with two infective classes in order to model the cholera epidemic in Haiti. We include the impact of environmental events (rainfall, temperature and tidal range) on the epidemic in the Artibonite and Ouest regions by introducing terms in the transmission rate that vary with environmental conditions. We fit the model on weekly data from the beginning of the epidemic until December 2013, including the vaccination programs that were recently undertaken in the Ouest and Artibonite regions. We then modified these projections excluding vaccination to assess the programs’ effectiveness. Using real-time daily rainfall, we found lag …
A Comparison Of Some Robust Bicariate Control Charts For Individual Observations, Moustafa Omar Ahmed Abu Shawiesh, Florence George, B M Golam Kibria
A Comparison Of Some Robust Bicariate Control Charts For Individual Observations, Moustafa Omar Ahmed Abu Shawiesh, Florence George, B M Golam Kibria
Department of Mathematics and Statistics
This paper proposed and considered some bivariate control charts to monitor individual observations from a statistical process control. Usual control charts which use mean and variance-covariance estimators are sensitive to outliers. We consider the following robust alternatives to the classical Hoteling’s T2: T2MedMAD, T2MCD, T2MVE A simulation study has been conducted to compare the performance of these control charts. Two real life data are analyzed to illustrate the application of these robust alternatives.