A failure detection service is perfect if it eventually detects all failures and every detection correctly identifies a failure that has occurred. Such a perfect failure detection service serves as a basic building block for many reliable distributed systems, for example in distributed lock services. In this paper, we introduce a perfect failure detection scheme in order to improve the fault to...

Failure detection is a fundamental building block for ensuring fault tolerance in distributed systems. However, providing accurate and flexible failure detection in off-the-shelf distributed systems is difficult. Practical solutions to failure detection rely on some adaptive mechanism to cope with the unpredictability of networking conditions. However, while they provide reasonably good accurac...

Node failures and ungraceful departures are important issues to be dealt with in overlay multicast. Fast detection is key to minimizing the disruption of service to the affected nodes participating in the multicast session. In this paper, we propose a cooperative failure detection mechanism that can greatly reduce the failure detection time. A significant contribution of the paper is that we qu...

Background & Aims: Diabetes is the most common cause of renal insufficiency throughout the world. The main cause of renal failure in diabetic patients is microvascular endothelial injuries that is secondary to atherosclerosis and ischemia. The efficacy of renal Doppler indices such as resistive index (RI) and pulsetile index (PI) for the evaluation of intrarenal arteries has been shown. This st...

Power network stability requires a timely failure detection and operator reaction. The protection devices and operators have responsibilities for the failure detection in a power system. In other words, alarms being received from the protection devices are displayed to the operator by SCADA to respond to the respective appropriate and timely actions to be done. This article is a part of a risk ...

Wireless multihop networks consist of numbers of wireless nodes. Hence, introduction of failure detection and recovery is mandatory. Until now, various failure detection and recovery methods such as route switch and multiple routes detection have been proposed based on an assumption with stop failure model. However, the assumption that failed wireless nodes never transmit any messages is too re...