Lionel Sacks

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We present a component-oriented approach to demonstrate the use of the Unified Modeling Language (UML) and Open Distributed Processing (ODP) concepts to design service components of a telecommunications management system. This paper is based on the work done in the design phase of the ACTS project " TRUMPET " (Inter-Domain Management with Integrity). This(More)
Sensor Networks [6, 5] consist of a large number of low-cost low-power devices, each with sufficient hardware to monitor one or more variables and send and receive the readings for these variables to other devices. Wireless sensor networks are becoming a powerful tool for monitoring a range of diverse situations [3, 8]. While the devices themselves are(More)
— It is has been previously demonstrated [4] that Internet topologies which were once considered unstructured networks with no global design processes actually follow power-laws, both at the router level and the AS (Autonomous System) domain level. This discovery has very wide implications on network research as well as network and protocol design. The(More)
Recently Active Networks were proposed as the approach that will enable quick introduction of new services in the current telecommunication infrastructure. This approach allows third party executable codes (proxylet) to be deployed into the network, which creates a big security risk. In this paper we present the application of Bayesian technology in the(More)
— Sensor networks in environmental monitoring applications aim to provide scientists with a useful spatio-temporal representation of the observed phenomena. This helps to deepen their understanding of the environmental signals that cover large geographic areas. In this paper, the spatial aspect of this data handling requirement is met by creating clusters(More)
With the sharp increase in heterogeneity and distribution of elements in wide-area networks, more flexible, efficient and autonomous approaches for management and information distribution are needed. This paper proposes a novel approach, based on gossip protocols and firefly synchronisation theory, for the management policy distribution and synchronisation(More)
The emerging active network concepts, particularly those focusing on the application level, will provide the users with the flexibility of deployment of customised services on the operator's infrastructure. This will be achieved through deployment of user customised control code in virtual execution environments residing on the network nodes such as routers(More)
In this paper, we contend that there are significant advantages in treating some classes of sensor networks as biological-like systems-both in structural design characteristics and in operational processes. We show how this design process leads to a sensor network system that is robust to topological changes, is scaleable and self-organising-and has a(More)