Learn More
Aim of this paper is to present a method to improve the accuracy of a GPS receiver. It is well known that there are many factors affecting the accuracy of a GPS receiver. In this work, the authors point out that many of these factors, considered in a given geographic area, have a certain periodicity. An important example of this kind of factors is the sky(More)
The increasing complexity of services required by users in Cloud Environments usually needs the definition of composite, value added services (VAS). Usage patterns and Use Cases definitions help in defining VAS, but a way to assure that new services reach the required goals with proper qualitative and quantitative properties has to be provided in order to(More)
The selection of Cloud providers, whose offers best fit the requirements of a particular application, is a complex issue due to the heterogeneity of the Cloud services, resources, technology and service levels offered by the several providers. In this paper, we illustrate a model for the resolution of a problem of choice between alternatives, when numerous(More)
Cloud computing is a technology of enormous scope for innovation especially in a volatile market and rapidly evolving, in which, the ability to exploit new technologies and remaining competitive is more important. However the choice of Cloud providers, whose offers best fit the requirements of a particular application, is a complex issue due to the variety(More)
The selection of Cloud providers, whose offers best fit the requirements of a particular application, is a complex issue due to the heterogeneity of the Cloud services, resources, technology and service levels offered by the several providers. In order to support this selection and requirements specification, we have developed, in the context of the mOSAIC(More)
The choice of a cloud computing vendor is really difficult because there are thousands of options and there are some key factors to consider in terms of characteristics of the service, general terms and conditions of service and service levels that providers ensure. Besides providers offer heterogeneous resources and technology described according to their(More)
Mobile devices can be used to improve the exploitation of reality by the user in pervasive environments. In this paper we present a software framework for augmenting the user's perception of reality by innovative applications and services. Mobile applications enable handheld devices to get information from pervasive sensors, as their own perceptors, in(More)