Compensation is widely used in advanced transaction models as a means of backward recovery from a failure. However, traditional compensation notions are not sufficient for handling failures in business processes if state changes involve consumable resources that cannot be undone. This paper presents a backward recovery mechanism to support the business process management domain. The proposed me...

Obtaining samples that represent original fluid of reservoirs optimizes reservoirs management. The optimized management increases recovery. Also, selecting and performing proper Improved Oil Recovery (IOR) or Enhance Oil Recovery (EOR) programs depend on collecting representative samples. Achieving accurate compositions of original in-situ fluid prevents overdesigning surface facilities. Re...

In today’s mechanized world, the need for a patient-friendly attitude in the hospitals and its psychological effects on the recovery time of patients has been proven. Considering the special pre and post-partum conditions of a pregnant woman, together with the fact that the mother and child cannot be treated as a patient case, makes these psychological effects more critical in this resear...

Malicious and misconfigured nodes can inject incorrect state into a distributed system, which can then be propagated system-wide as a result of normal network operation. Such false state can degrade the performance of a distributed system or render it unusable. In the case of network routing algorithms, for example, false state corresponding to a node incorrectly declaring a cost of 0 to all de...

This paper presents two separate structures for the blind source recovery (BSR) of stochastically independent signal sources. We hypothesize linear state space models for both the mixing environment and the demixing (i.e. recovering) adaptive network. Separate algorithms for adaptive estimation of parameters for the feedforward and feedback recovering networks have been derived. Auxillay condit...

The ANSI X9.17/X9.31 random number generator is a pseudorandom number generator design based on a block cipher and updated using the current time. First standardized in 1985, variants of this PRNG design were incorporated into numerous cryptographic standards over the next three decades. It remained on the list of FIPS 140-1 and 140-2 approved random number generation algorithms until January 2...

With the increasing demands for real-time applications traffic in networks such as video and voice a high convergence time for the existing routing protocols when failure occurred is required. These applications can be very sensitive to packet loss when link/node goes down. In this paper, we propose two algorithms schemas for the link state protocol to reroute the traffic in two states; first, ...

We consider an architecture for ultra-dependable operation based on synchronized state machine replication, extended to provide transient recovery and reconnguration in the presence of Byzantine faults. The architecture allows processors suspected of being faulty to be placed on \probation." Processors in this status cannot disrupt other processors, but those that are nonfaulty or recovering fr...

The paper describes the use of the state space and the natural gradient for the demixing of sources mixed in a non-minimum phase convolutive environment. Non-minimum phase implies that some or all of the zeros of the mixing environment lie outside the unit circle, and as such the theoretical inverse or the requisite demixing system becomes unstable due to the presence of poles outside the unit ...

This paper presents a corrective control scheme that automatically counteracts the adverse effect of intermittent faults in the logic of asynchronous sequential machines. When an intermittent fault occurs to the machine, a set of state transitions defined in the machine suspends the normal behavior for a finite interval. The objective is to design a corrective controller that makes the closed-l...