Rich Internet Applications (RIA) require fast execution time and allow richer, faster, and more interactive experiences. Flash is a common technology for building RIAs. Flash programmers usually specialize in graphic design rather than programming. In addition, the tight schedule of projects makes the Flash programmers ignore non-functional characteristics such as the efficiency of their system...

A fundamental concern of any secure group communication system is key management and wireless environments create new challenges. One core requirement in these emerging networks is self-healing. In systems where users can be offline and miss updates, selfhealing allows a user to recover lost session keys and get back into the secure communication without putting extra burden on the group manage...

Access control in dynamic environments needs the ability to provide more access opportunities of information to users, while also ensuring protection information from malicious users. Trust and risk are essential factors and can be combined together in access control decision-making to meet the above requirement. In this paper, we propose the combination of the trust and risk in access control ...

In this paper, we consider a non-orthogonal multiple access (NOMA) system with coordinated multi-point (CoMP), which is used in 5G cellular networks to guarantee the rate requirements from different edge users. Based on China Family Panel Studies (CFPS) dataset, use several learning algorithms predict users’ according their profiles. We propose many-to-many two-side subchannel–user matching str...

A requirement of pervasive computing systems is context data sharing among software components that collaborate in providing services to users. The solution to this requirement becomes more challenging when the communication scenario is peer-to-peer, i.e. the context data are distributed among components, rather than be held by a centralized server. This paper faces the context data sharing iss...

Variable environments in ad hoc networks require a joint control of physical (PHY) and medium access control (MAC) layers resources in order to optimize performance. In this paper, we propose a framework to perform such cross-layer control and optimization. The PHY layer and cross-layer engine estimate and predict the channel variations to select the users that will meet the signal-to-interfere...

This paper describes the application of cognitive mapping techniques, for eliciting and representing cognitive structure, to the problem of user requirement capture for the design of an electronic database. The research is based upon the assumption that organising information so as to be compatible with the structure of users' knowledge will enhance information retrieval by supporting more effe...

All important features, such as usability, quality, or efficiency of a product, are determined early on in the design process by the extent to which design requirements are captured and understood. Traditionally, however, those most effected by design decisions, such as users, have been left out of the design process in general and the requirement gathering in particular. Although restricted ex...

In recent years, various organizations by following the concept of service oriented architecture, offer their services with independent and reusable programs on Internet. Since these services can be called by application programs and other services, the concept of implementing inter-organizational workflow by dynamically composing the services is being developed. The necessary requirement of th...