Distributed Computing Systems (DCS) have become a major trend in computer system design today, because of their high speed and reliable performance. Reliability is an important performance parameter in DCS design. In the reliability analysis of a DCS, the term of K-Node Reliability (KNR) is defined as the probability that all nodes in K (a subset of all processing elements) are connected. In th...

Need of storing a huge amount of data has grown over the past years. Whether data are of multimedia types (e.g. images, audio, or video) or are produced by scientific computation, they should be stored for future reuse or for sharing among users. Users also need their data as quick as possible. Data files can be stored on a local file system or on a distributed file system. Local file system pr...

Towards 5G, the challenge to achieve high reliability and low latency asks for new directions in systems so far strongly focusing on high data rates. Schemes to achieve high reliability for low latency demanding services are link diversity to ensure reliability and resource reservation to avoid scheduling delays. However, these schemes place high demands on the scarce radio resources. In this p...

Flow allocation problem is one of the important steps in reliability evaluation or optimization of a stochastic flow network. In a single source single sink networks it is easy to determine the flow on each path by using one of best known methods. While, in the case of multisource multisink flow network the file allocation problem becomes more complicated and few studies have dealt with it. Thi...

There is a growing need for a more accurate assessment of the load carrying capacity of highway bridges. The traditional approach is based on consideration of individual components rather than structures. Consequently, the acceptance criteria are formulated in terms of the allowable stress, or ultimate moment, in a component. However, it has been observed that the load carrying capacity of the ...

Abstract—Cooperative spectrum sensing is a crucial challenge in cognitive radio networks. Cooperative sensing can increase the reliability of spectrum hole detection, optimize sensing time and reduce delay in cooperative networks. In this paper, an efficient central capacity optimization algorithm is proposed to minimize cooperative sensing time in a homogenous sensor network using OR decision ...

Storage is being proposed to solve many issues on distribution networks and distribution planners need tools to assess its impact on capacity, reliability, and power quality. Accurate analysis requires sequential-time simulation. This paper describes three types of storage simulations on distribution systems for three different time frames: capacity evaluations in 15-min intervals; renewable ge...

The demand for wireless connectivity to the Internet is increasing. As the network grows and assimilates an increasing range of both wireless and wire line link technologies, it is becoming increasingly heterogeneous. Compared to wire line transmission technologies, practical radio data transmission technologies are far more limited in capacity and reliability. This has lead to the development ...

In wireless networks, the trade-off between reliability and efficiency is often obtained through multipath routing schemes. In multipath environments, such as those found in sensor networks, traditional internet routing solutions cannot be employed. Moreover, because multipath construction and maintenance is costly, a common alternative is using braided meshes, where it is difficult to calculat...

This paper studies the effect of cascading failures in the risk and reliability assessment of complex infrastructure systems. Conventional reliability assessment is limited to connectivity analysis and does not include the effect of increased flow demand or flow capacity of existing network components. Network flows are associated with congestion-based disruptions which can worsen connectivity-...