Ubiquitous computing provides a dynamic access to different functionalities of networkable electronic devices. Whereas basic services have limited use, predefined complex services cannot encompass every end-user’s needs nor be adapted to a set of services that are dynamically discovered in an open environment. Alternatively, users need to be provided with means to express their requirements, ch...

Grid computing enables the sharing and aggregation of autonomous IT resources to deliver them as computing utilities to end users. The management of the Grid environment is a complex task as resources are geographically distributed, heterogeneous and autonomous in nature, and their users are self-interested. In utility-oriented Grids, users define their application requirements and compete to a...

In this paper we provide a brief formal definition of the Users View (UV) of the Graphical Object Query Language (GOQL). The UV provides a graphical representation for object-oriented database schemas and hides from end-users most of the perplexing details of the object-oriented database model, such as methods, hierarchies and relationships. In particular, the UV does not distinguish between me...

Service-orchestrations define how services can be composed together and are widely used to execute applications based on Service Oriented Architectures (SOAs). However, the various special purpose orchestration languages used today require code-level constructs that force the users to provide excessive technical detail. For many SOA domains end-users of these orchestrations have limited technic...

One of the existing problems in requirement engineering consists in arriving to capture final user requirements as well as possible. But it is clear that engineering methods such as goal-oriented models or system-oriented requirement diagrams such as SYSML are sometimes too hard for end-users. In this paper we define a systematic process allowing ennd-users to specify requirements using cogniti...