We propose, implement, and evaluate VIPER, a system to isolate, provide QoS, and manage virtual networks. Contrary to previous approaches, VIPER guarantees a fine sharing of physical resources among virtual networks according to the different parameters that describe the service level agreements. The main components of the proposed system are the resource sharing manager and the virtual network...

The authors present a parsimonious theoretical model that illustrates how Internet-based virtual environments (such as social networking Web sites) moderate the relationship between social networks and social entrepreneurship. Social networks promote social entrepreneurship by means of (a) technology and knowledge transfer; (b) locating information; (c) generating entrepreneurial opportunities;...

The main objective of this project is obtaining topology-preserving maps (TPMs) from virtual coordinates (VCs) of wireless sensor networks. Virtual coordinates (VCs) provide an economical alternative to geographical coordinates for routing and self organization of large-scale wireless sensor networks (WSNs). This project proposes the TPM from the virtual co-ordinates. In a virtual coordinate sy...

Survivability in networks has always been an important issue and lately becomes for network virtualization. Network virtualization provides to run multiple virtual networks on a shared physical network. Since a failure in the physical network can affect several virtual resources, therefore, the survivability has to be considered in the embedding of the virtual resources. In this paper, we prese...

One of the key interests in Future Internet research is network virtualization [1]. It allows to operate multiple networks in parallel, each possibly having different applications, requirements, protocols, and even users. For the 4WARD Project1 network virtualization is one of the core concepts to let 1000 networks bloom. With such highly specialized virtual networks, users do not just use a si...