Advancement in wireless sensor networks technology enables a wide range of applications such as health care, industrial automation, ambient conditions monitoring and security and defense systems. WSNs designers are facing many challenges in meeting application requirements e.g. reliability, fault tolerance, lifetime, throughput and responsiveness etc as application requirements and environmenta...

We present ideas on how to structure software systems for high availability by considering MTTR/MTTF characteristics of components in addition to the traditional criteria, such as functionality or state sharing. Recursive restartability (RR), a recently proposed technique for achieving high availability, exploits partial restarts at various levels within complex software infrastructures to reco...

The technological advancements in field of Computer aided design and manufacturing have led to development of conventional numeric control. The conceptual framework initially designed during the early developments still undergoes few small customized changes as per the challenges. CNC Machines are the contrast to the conventional machining operations which were initially either hand operated, l...

Modeling the reliability of distributed systems requires a good understanding of the reliability of the components. Careful modeling allows highly fault-tolerant distributed data applications to be constructed at the least cost. Failure and repair rates of components are often assumed to be exponentially distributed. This hypothesis is testable for failure rates, though the process of gathering...

Modeling the reliability of distributed systems requires a good understanding of the reliability of the components. Careful modeling allows highly fault-tolerant distributed data applications to be constructed at the least cost. Failure and repair rates of components are o f e n assumed to be exponentially distributed. This hypothesis is testable f o r failure rates, though the process of gathe...

Exercise 1 Let us consider a system composed of n different components denoted 1, 2 ……n, with m identical replicas of each component. Two redundancy strategies are studied:-GR, in which redundancy is applied globally at the system level: the architecture is composed of m identical copies of the system that are organized according to a parallel structure.-LR, in which redundancy is applied local...

Recovery Oriented Computing (ROC) is a joint research effort between Stanford University and the University of California, Berkeley. ROC takes the perspective that hardware faults, software bugs, and operator errors are facts to be coped with, not problems to be solved. This perspective is supported both by historical evidence and by recent studies on the main sources of outages in production s...

The ubiquity of information systems has made correct and reliable operation of critical systems indispensable. The trustworthiness of digital systems is increasingly dependent on the trustworthiness of the software. While hardware trustworthiness is by no means a solved problem, systemwide problems are increasingly blamed on poorly tested, defective software. System trustworthiness is therefore...

Operational systems deteriorate over time and eventually fail by the failure of one or more of their components. Failed components are either replaced or repaired, and replacement is usually expensive. This article examines the behavior of repairable systems with imperfect repair, where a failed component is repaired once or more depending on factors such as repair cost, level of deterioration,...

A new class of wireless neural interfaces is under development in the form of tens to hundreds of mm-sized untethered implants, distributed across the target brain region(s). Unlike traditional interfaces that are tethered to a centralized control unit and suffer from micromotions that may damage the surrounding neural tissue, the new free-floating wireless implantable neural recording (FF-WINe...