Fault-tolerant distributed systems based on fieldbuses may benefit to a great extent from the availability of semantically rich communication services, such as those provided by group communication, clock synchronization, membership and failure detection. This is specially true of distributed critical control applications. However, the migration of those services to the realm of simple fieldbus...

The impact of network failures can be minimized if users are promptly notified by appropriately designed applications. Specifically, for Voice-over-IP (VoIP) networks, an RTP/RTCP-based detection method can be used to rapidly distinguish between network congestion and network failures. Users and network managers can exploit this information in various ways, such as rapid network recovery or see...

We investigate the problem of distributed sensors’ failure detection in networks with a small number of defective sensors, whose measurements differ significantly from neighboring sensor measurements. Defective sensors are represented by non-zero values in binary sparse signals. We build on the sparse nature of the binary sensor failure signals and propose a new distributed detection algorithm ...

Failure detection protocols—a fundamental building block for crafting fault-tolerant distributed systems—are in many cases described by their authors making use of informal pseudo-codes of their conception. Often these pseudo-codes use syntactical constructs that are not available in COTS programming languages such as C or C++. This translates into informal descriptions that call for ad hoc int...

The secure and efficient detection of process failures is an essential requirement of many distributed systems. In this paper, we present the design and analysis of a mechanism used for the detection of member failures in secure groups. Based on one-time passwords, our solution does not obviate the need for periodic statements from group members, but significantly reduces the cost of their gene...

Social comparison, the process in which individuals compare their behavior and beliefs to those of other agents, is an important process in human societies. Our aim is to utilize theories of this process for synthetic agents, for the purposes of enabling social skills, teamcoordination, and greater individual agent performance. Our current focus is on individual failure detection and recovery i...

We provide an signal modality analysis on the heart rate variability (HRV) data, widely studied as an indication of the health status of the heart. The analysis is achieved by using the recently proposed ‘delay vector variance’ (DVV) method, which rests upon examining the local predictability of a signal in the phase space. A comprehensive analysis of the feasibility of this approach is provide...

FaDe service is a novel proposal of failure detection service based on the REST paradigm for the SOA environment. Modularity of architecture allows to build generic service that can be further optimized. FaDe service is fully distributed and provide two communication protocols (gossip, Kademlia) that allow FaDe nodes to cooperate e ciently and make FaDe very scalable. Failure monitoring is base...

One of the main design goals of the Internet is robustness against failures. Normally, this is accomplished by redundancy and dynamic routing protocols that automatically adapt to failures: If a link is unavailable, data packets can generally be sent via alternative paths. An essential requirement for this is a fast mechanism for failure detection, since routing protocols can only start to rero...