This paper proposes a replica selection and downloading scheme in λ-grid networks. In λ-grid networks, in order to distribute loads and achieve high performance computing, a large amount of data is replicated on storage servers as files, and clients download these replicas. To download replicas efficiently, an appropriate replica selection scheme which avoids wavelength contention is required b...

Single data replica management strategy can not meet the complexity and diverseness in data grid. This paper proposes a dynamic self-adapting replica management architecture (DSA-RM) driven by software architecture (SA). In DSA-RM, architecture descriptions are shared by the whole grid environment as a system kernel to schedule various replica management components that are adapted to various a...

In 1986, Swendsen and Wang proposed a replica Monte Carlo algorithm for spin glasses [Phys. Rev. Lett. 57 (1986) 2607]. Two important ingredients are present, (1) the use of a collection of systems (replicas) at different of temperatures, but with the same random couplings, (2) defining and flipping clusters. Exchange of information between the systems is facilitated by fixing the τ spin (τ = σ...

An attacker can capture and compromise sensor nodes, takes the confidential information from sensor nodes and create various attacks with these replicas. An adversary can create mobile replicas of sensor nodes, to transmit fake data, to handle and control the network operations. The Sequential Probability Ratio Test (SPRT) and quarantine defense strategies were proposed to detect and optimise m...

In this paper, we present some of the fault tolerance management mechanisms being implemented in the Multi-μ architecture, namely its support for replica non-determinism. In this architecture, fault tolerance is achieved by node active replication, with software based replica management and fault tolerance transparent algorithms. A software layer implemented between the application and the real...

In these lectures I will review the approach to glasses based on the replica formalism. Many of the physical ideas are very similar to those of older approaches. The replica approach has the advantage of describing in an unified setting both the behaviour near the dynamic transition (mode coupling transition) and near the equilibrium transition (Kauzman transition) that is present in fragile gl...