Krongthong Supappornchai.. Mathematical prediction on the end of facebook by the birSIRS and mbirSIRS models with varying total population size. Master's Degree(Applied Mathematics). King Mongkut's University of Technology North Bangkok. Central Library. : King Mongkut's University of Technology North Bangkok, 2018.
Mathematical prediction on the end of facebook by the birSIRS and mbirSIRS models with varying total population size
Abstract:
In this thesis, we have studied the social network user models which are the birSIRS and mbirSIRS models. Firstly, we have studies the birSIRS model and we have found that the first equilibrium point, has the basic reproduction number . The condition for asymptotic stability is , which concludes that the Facebook will end. The second equilibrium, , has the generalized reproduction number, and it is locally asymptotically stable equilibrium under the conditions and , which mean that the Facebook application has gained an enormous of popularity. The last equilibrium, is local asymptotic stability with the condition . From the sensitivity analysis, the most effect of parameters for the end of Facebook are (increase), (decrease) and (decrease), respectively. In numerical results, we have found that the most of parameters for Facebook reaching an enormous of popularity are (decrease), (decrease), (increase), (increase) and (decrease), respectively.
In the second model, the mbirSIRS model has three equilibrium points for the end of Facebook which are , and
For each equilibrium point, the basic and generalized reproduction numbers are when and , respectively. The locally (Lyapunov globally) asymptotically stable at with the condition which conclude that the Facebook will be end, is locally and Lyapunov globally asymptotic stability with the conditions and which mean that the Facebook is rapid decline, and is locally asymptotic stability with the condition which means that the Facebook will be end slowly. In numerical results, the most effect parameters for the end of Facebook are the increasing of the rate of permanently quit network and decreasing of the rate of recruitment for latent users at least 13 year old . Moreover, two equilibrium points for the popularity of Facebook are and which gives is The condition for local asymptotic stability at is which concludes that the Facebook thrives long-term even all passive Facebook users leave the Facebook. Locally and Lyapunov globally asymptotic stability at have the conditions which mean that the Facebook rapidly gain worldwide popularity. From the numerical results, the most effect of parameters for reducing are the decreasing of the rate of latent users joining passive Facebook and the increasing of the rate of latent users joining active Facebook .