Here we provide a detailed analysis, along with some extensions and additonal investigations, of a recently proposed [1] self–organised model for the evolution of complex networks. Vertices of the network are characterised by a fitness variable evolving through an extremal dynamics process, as in the Bak–Sneppen [2] model representing a prototype of Self–Organized Criticality. The network topol...

In presenting examples from the most extensive and demanding fire in modern Swedish history, this paper describes challenges facing hastily formed networks in exceptional situations. Two concepts that have been used in the analysis of the socio-technical systems that make up a response are conversation space and sensemaking. This paper argues that a framework designed to promote understanding o...

The inter-relationships and inter-dependencies between formerly stand-alone systems and networks are leading to complexities in the infrastructures of our society that have never been seen before. These complex systems and networks disseminate and process massive amounts of personal and business data, information and content in ways which are difficult to understand and control for users, in pa...

Existing social networks are based on centralised architectures that manage users, store data, and monitor the security policy of the system. In this work, we present DS4, a Distributed Social and Semantic Search System that allows users to share and search for content among friends and clusters of users that specialise on the query topic. In DS4, nodes that are semantically, thematically, or s...

1 Application of a New Service-Oriented Architecture (SOA) Paradigm on the Design of a Crisis Management Distributed System Konstantinos Domdouzis, Centre of Excellence in Terrorism, Resilience, Intelligence & Organised Crime Research (CENTRIC), Sheffield Hallam University, Sheffield, UK Simon Andrews, Centre of Excellence in Terrorism, Resilience, Intelligence & Organised Crime Research (CENTR...

The existing TCP/IP based Internet relies on the Internet Protocol to provide a basic level of networklayer functionality that abstracts out the heterogeneous link-layer technologies over which the Internet operates. IP provides end-to-end packet switched communication across the network under certain, often unstated, assumptions. These assumptions do not necessarily apply to the class of chall...

The problem of finding trust paths and estimating the trust one can place in a partner arises in various application areas, including virtual organisations, authentication systems and reputation systems. We study the use of peer-to-peer algorithms for finding trust paths and probabilistically assessing trust values in systems where trust is organised similar to the ‘web of trust’. We do this th...

Due to the characteristics of the modern economy (such as the diffusion of Information And Communication Technologies ICT, the increasing global competition, and the complexity of innovation processes), even the largest firms can’t operate in isolation, but are embedded into international networks of relationships. For this reason, there have been significant efforts in the economic and manager...

MANETs (mobile ad hoc networks) operate in a self-organised and decentralised way. Attacks against nodes that are highly relied to relay tra c could result in a wide range of service outage. A comprehensive model that could enhance the understanding of network behaviour under attacks is important to the design and construction of resilient self-organising networks. Previously, we modelled MANET...

LavaNet consists of a series of scripts written in Perl that give access to a neural network simulation environment inside a general mine planning package. LavaNet enables easy development of neural network training datasets using information from any of the data and model structures available, such as block models and drillhole databases. Neural networks can be trained inside the mine planning...