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The Internet is a worldwide distributed critical infrastructure, and it is composed of many vital components. While IP routing is the most important service, today the Domain Name System can be classified as the second most important, and has been defined as a critical infrastructure as well. DNS enables naming services used by every networked application and therefore by every networked critical...
The complexity of cloud systems poses new infrastructure and application management challenges. One of the common goals of the research community, practitioners and vendors is to design self-adaptable solutions capable to react to unpredictable workload fluctuations and changing utility principles. This paper analyzes the problem from the perspective of an application service provider that uses a...
We report on an recent European Project aimed at assessment of suited Methodologies to measure interdependencies between the Electric and the ICT System. Based on best practices and available data, several different metrics have been defined. Depending on the methodology involved, three main types of metrics can be identified; namely “topological”; “system theory based” and “simulation based” metrics...
Nowadays the simulation of scenarios composed by interdependent critical infrastructures is a challenge. One of the main challenge is how to manage into a single framework heterogeneous and interdependent infrastructures characterized by very different time scales, modeling paradigms and functional behavior. In this paper we propose a two-stage approach, where several sector specific simulators are...
All individuals of every nation rely on many infrastructures that provide us all essential services to support our welfare, economy and quality of life. These critical infrastructures are complex and interdependent systems and a comprehensive study of their dynamic is mainly addressed using simulative approaches. In this paper we discuss advantages, drawbacks, cost and scalability of two agent based...
In this paper we introduce MORE-GIS, a simulator for the simulation of mobile nodes connected to wired and wireless network for the study of critical infrastructures interdependencies. MORE-GIS is based on agent based simulation approach and HLA architecture. Every node is an agent that represents a person. Agents are connected to Internet generating a certain amount of traffic and can move to a new...
What we propose is a framework, based on federated simulation and ABMS, which has the goal to support the correct modeling, understanding and quantification of complex critical systems interdependencies and behavior. The advantages of the proposed solution are: 1) the complex system is modeled using a bottom-up approach, form the single components to the whole system (ABMS capability); 2) specific...
Agent-based modeling and simulation (ABMS) is one of the more promising simulation techniques to study the interdependencies in critical infrastructures. Moreover, federated simulation has two relevant properties, simulation models reuse and expertise sharing, that could be exploited in a multi-sectorial field, such as critical infrastructure protection. In this paper we propose a new methodology...
The actual standards for service authoring, composition and development are not easy to port and to apply for next generation mobile applications. This paper describes some tools that we're developing in the context of the IST-Simple Mobile Service project, whose aim is to ease the authoring and the use of services for mobile devices. We propose a service composition approach using an UML profile...
One of the main issues in content-based publish/subscribe (CBPS) systems is how to dynamically determine groups of similar subscriptions to be adopted for exploiting efficient multicast techniques while guaranteeing at the same time the expressiveness of the subscription scheme. In this work, we propose a distributed mechanism which aims at satisfying important requirements of CBPS systems, that are:...
To date, mobile services have failed to match the explosive growth of the Web. This, we argue, is because current mobile services are difficult to find, to use, to trust, to design and deploy. The IST SMS (Simple Mobile Services) project takes up the challenge of creating innovative tools addressing the specific needs of mobile users and making it easier for individuals and small businesses to become...
In the service oriented paradigm applications are created as a composition of independently developed Web services. Since the same service may be offered by different providers with different non-functional Quality of Service (QoS) attributes, a selection process is needed to identify the constituent services for a given composite service that best meet the users QoS requirements. In this paper, we...
In nowadays wireless networks, mobile users frequently access Internet services that are often based on information concerning the application context and service status. In presence of mobility, the procedure of service handover, may require a restart of the ongoing service, if the necessary context information is not properly transferred to the new point of access. Context transfer procedures introduce...
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