title: GRAPHICAL USER INTERFACE WITH APPLICATIONS IN SUSCEPTIBLE-INFECTIOUS-SUSCEPTIBLE MODELS.
abstract: Practical significance of understanding the dynamics and evolution of infectious diseases increases continuously in contemporary world. The mathematical study of the dynamics of infectious diseases has a long history.
  
  
  OBJECTIVE
  By incorporating statistical methods and computer-based simulations in dynamic epidemiological models, it could be possible for modeling methods and theoretical analyses to be more realistic and reliable, allowing a more detailed understanding of the rules governing epidemic spreading.
  
  
  METHODS
  To provide the basis for a disease transmission, the population of a region is often divided into various compartments, and the model governing their relation is called the compartmental model. To present all of the information available, a graphical user interface provides icons and visual indicators. The graphical interface shown in this paper is performed using the MATLAB software ver. 7.6.0. MATLAB software offers a wide range of techniques by which data can be displayed graphically. The process of data viewing involves a series of operations. To achieve it, I had to make three separate files, one for defining the mathematical model and two for the interface itself.
  
  
  RESULTS
  Considering a fixed population, it is observed that the number of susceptible individuals diminishes along with an increase in the number of infectious individuals so that in about ten days the number of individuals infected and susceptible, respectively, has the same value. If the epidemic is not controlled, it will continue for an indefinite period of time. By changing the global parameters specific of the SIS model, a more rapid increase of infectious individuals is noted.
  
  
  CONCLUSIONS
  Using the graphical user interface shown in this paper helps achieving a much easier interaction with the computer, simplifying the structure of complex instructions by using icons and menus, and, in particular, programs and files are much easier to organize. Some numerical simulations have been presented to illustrate theoretical analysis.
authors.forename: M
authors.initials: M
authors.lastname: Ilea
authors.forename: M
authors.initials: M
authors.lastname: Turnea
authors.forename: D
authors.initials: D
authors.lastname: Arotăriţei
authors.forename: Mariana
authors.initials: M
authors.lastname: Rotariu
authors.forename: Marilena
authors.initials: M
authors.lastname: Popescu
mesh_terms: D003141:Communicable Diseases / Q000453:epidemiology / Q000635:transmission; D003196:Computer Graphics; D003198:Computer Simulation; D006801:Humans; D008432:Mathematical Computing; D012383:Romania / Q000453:epidemiology; D014584:User-Computer Interface