title: The cloud paradigm applied to e-Health.
abstract: BACKGROUND
  Cloud computing is a new paradigm that is changing how enterprises, institutions and people understand, perceive and use current software systems. With this paradigm, the organizations have no need to maintain their own servers, nor host their own software. Instead, everything is moved to the cloud and provided on demand, saving energy, physical space and technical staff. Cloud-based system architectures provide many advantages in terms of scalability, maintainability and massive data processing.
  
  
  METHODS
  We present the design of an e-health cloud system, modelled by an M/M/m queue with QoS capabilities, i.e. maximum waiting time of requests.
  
  
  RESULTS
  Detailed results for the model formed by a Jackson network of two M/M/m queues from the queueing theory perspective are presented. These results show a significant performance improvement when the number of servers increases.
  
  
  CONCLUSIONS
  Platform scalability becomes a critical issue since we aim to provide the system with high Quality of Service (QoS). In this paper we define an architecture capable of adapting itself to different diseases and growing numbers of patients. This platform could be applied to the medical field to greatly enhance the results of those therapies that have an important psychological component, such as addictions and chronic diseases.
authors.affiliation: Computer Science Department, University of Lleida, Jaume II 69, 25001 Lleida, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Vilaplana
authors.forename: Francesc
authors.initials: F
authors.lastname: Solsona
authors.lastname: Abella
authors.forename: Rosa
authors.initials: R
authors.lastname: Filgueira
authors.forename: Josep
authors.initials: J
authors.lastname: Rius
mesh_terms: D003195:Computer Communication Networks; D006801:Humans; D016247:Information Storage and Retrieval; D020407:Internet; D016730:Program Development; D012984:Software; D017216:Telemedicine / Q000458:organization & administration*; D014584:User-Computer Interface