Fault detection and isolation are very important elements in the design of faulttolerant decision support systems for ship operator guidance. This study outlines remedies that can be applied for fault diagnosis, when the ship responses are assumed to be linear in the wave excitation. A novel numerical procedure is described for the calculation of residuals using the ship’s transfer functions wh...

The Eternal system enhances the CORBA standard to provide fault tolerance within distributed systems that are susceptible to network partitioning. Fault tolerance is achieved through consistent replication of both client and server objects. Objects may be actively or passively replicated, and replicated objects of both types may coexist. Nested operations involving both active and passive objec...

1 Introduction The design of fault-tolerant systems is a challenging problem. It requires close attention to many issues, e.g., the fault-model, the connectivity of the system topology, the concurrent programming paradigm used (say, for instance, synchronous message passing), the message transfer delays of the communication network, the support for scheduling real-time processes, etc. A vast am...

Concurrent error detection (CED) based on time redundancy entails performing the normal computation and the re-computation at different times and then comparing their results. Time redundancy implemented can only detect transient faults. We present two algorithm-level time-redundancy-based CED schemes that exploit register transfer level (RTL) implementation diversity to detect transient and pe...

Planetary gearboxes are widely used in the drivetrain of helicopters and wind turbines. Any planetary gearbox failure could lead to breakdown of the whole drivetrain and major loss of helicopters and wind turbines. Therefore, planetary gearbox fault diagnosis is an important topic in prognostics and health management (PHM). Planetary gearbox fault diagnosis has been done mostly through vibratio...

-The goal f the NASA HPCC Remote Exploration and Experimentation (REE) Project is to transfer commercial supercomputing technology into space. The project will use state of the art, low-power, nonradiation-hardened, commercial Off-The-Shelf (COTS) hardware chips and COTS software to the maximum extent possible, and will rely on Software-Implemented Fault Tolerance (SIFT) to provide the required...

We study the ground motion simulations based on three finite-source models for the 2007 Mw6.6 Niigata Chuetsu-oki, Japan, earthquake in order to discuss the performance of the input ground motion estimations for the near-field seismic hazard analysis. The three models include a kinematic source inverted from the regional accelerations, a dynamic source on a planar fault with three asperities in...

-The goal of the NASA HPCC Remote Exploration and Experimentation (REE) Project is to transfer commercial supercomputing technology into space. The project will use state of the art, low-power, non-radiationhardened, Commercial Off-The-Shelf (COTS) hardware chips and COTS software to the maximum extent possible, and will rely on Software-Implemented Fault Tolerance (SIFT) to provide the require...

A blockchain is a distributed ledger for recording transactions, maintained by many nodes without central authority through a distributed cryptographic protocol. All nodes validate the information to be appended to the blockchain, and a consensus protocol ensures that the nodes agree on a unique order in which entries are appended. Consensus protocols for tolerating Byzantine faults have receiv...

This paper describes the design of a reconfigurable system using an FPGA (field programmable gate array) whose primary function is high-speed (several Gb/s) network data monitoring and run-time adaptive fault injection and statistics gathering for failure analysis. The system is designed for two types of mediaMyrinet SAN and Fibre Channeland failure analysis can be performed simultaneously ov...