Uncertainty profiles are used to study the effects of contention within cloud and service-based environments. An uncertainty profile provides a qualitative description of an environment whose quality of service (QoS) may fluctuate unpredictably. Uncertain environments are modelled by strategic games with two agents; a daemon is used to represent overload and high resource contention; an angel i...

High-reliability system design has experienced a similar need to reduce system size, power, and cost while maintaining expected reliability. Traditionally, these system designs have achieved reliability through redundancy. This redundancy manifests itself though increased component count, logic size, system power, and cost. These same reliability requirements and attributes are shared by other ...

Many software systems today, such as computational grids, include faulty and untrusted components. As faults are inevitable, these systems utilize redundancy to achieve fault tolerance. In this paper, we present two new, “smart” redundancy techniques: iterative redundancy and progressive redundancy. The two techniques are efficient, adaptive, and automated. They are efficient in that they lever...

Reliability allocation process may be described as the process of assigning reliability requirements to individual components within a system to attain the specified system reliability. For large systems, the allocation process is often performed at different stages of system design. The allocation process often begins at the conceptual stage. As the system design develops, more information abo...

—The paper presents features and implementation of a shared redundant approach to increase the reliability of networked control systems. Common approaches based on redundant components in control system use passive or active redundancy. We deal with quasi-redundant subsystems (shared redundancy) whereas basic features are introduced in the paper. This type of redundancy offers several important...

This paper presents a survey on existing data transport reliability protocols in wireless sensor networks (WSNs). Most of the existing research employs retransmission mechanisms to achieve reliability, ignoring the use of redundancy schemes such as erasure codes to enhance event reliability. We review the data transport reliability schemes in terms of event and packet reliability using retransm...

this paper presents an optimal integrated instrumentation sensor network design methodology for complex nonlinear chemical process plants using a combinatorial particle swarm optimiazation (cpso) engine. no comprehensive sensor network design approach has been addressed yet in the literature to simultaneously incorporate cost, precision and reliability requirements for nonlinear plants. the pre...