The mobile wireless environment poses challenging fault-tolerant data management problems due to mobility of users, and limited bandwidth on the wireless link. Traditional fault-tolerance schemes, therefore, cannot be directly applied to these systems. Mobile systems are often subject to environmental conditions which can cause loss of communications or data. Because of the consumer orientation...

Clustered computing systems, using commercially available computers networked in a loosely-coupled fashion, can provide high levels of reliability if appropriate levels of error detection and recovery software are implemented in the middleware and application layers. In this paper we present a modeling approach for analyzing the hardware and software reliability of clustered computing systems. ...

In the framework of the ESPRIT project 28620 “TIRAN” (tailorable fault tolerance frameworks for embedded applications), a toolset of error detection, isolation, and recovery components is being designed to serve as a basic means for orchestrating application-level fault tolerance. These tools will be used either as stand-alone components or as the peripheral components of a distributed applicat...

The mobile wireless environment poses challenging problems in designing fault-tolerant systems because of the dynamics of mobility, and limited bandwidth available on wireless links. Traditional fault-tolerance schemes, therefore, cannot be directly applied to these systems. Mobile systems are often subject to environmental conditions which can cause loss of communications or data. Because of t...

Model-based control and monitoring such as feed-forward/feedback control, fault detection and isolation (FDI), and fault-tolerant control (FTC) techniques that utilize Lyapunov-based control laws are implemented on a high recovery reverse osmosis desalination plant model. A detailed mathematical model of a high recovery reverse osmosis plant is developed. This model incorporates the large spati...

Criticul infrastructure applications pmvide services upon which society depends heavily; such applications require survivabiliry in the face of faults that mighr cause a loss of service. These applications are lhemselves dependent on distributed information systems for all aspects of their operation ond so survivability of rhe information systems is an important issue. Fault tolerance is U key ...

An analytical model is used to investigate the effects of checkpointing on the performance and availability of sequential and parallel applications. Known as Steady-State Performability (SSP), this model provides a probabilistic method for quantifying delivered performance considering failure and recovery. Input parameters describe both the distributed application and the processing environment...

The proposed design of HDB3 decoding system using FPGA implementation offers an efficient and unfailing decoding at receiving end by sustaining clock data recovery using Direct Digital Synthesis (DDS). The system captures E1/T1 HDB3 encoded tertiary level stream at input, converts it into binary level symbols, FPGA IO reconcilable, and decode and transforms it into synchronized NRZ output. The ...