Large infrastructures, such as clouds, can exhibit substantial outages, sometimes caused by failure scenarios not predicted during system design. We define a method for modelbased prediction of system quality characteristics. The method uses a genetic algorithm to search system simulations for parameter combinations that result in system failures, so that designers can take mitigation steps bef...

Simulation of dam breach scenarios can help in the preparation emergency action plans for real breaks or flash flooding events. The purpose this study was to identify flood-prone areas Al Wala Valley governorate Madaba Jordan through analysis Dam. Modelling breaches conducted under two scenarios: a Clear Day scenario and Probable Maximum Flood (PMF) scenario. former does not address various fai...

Robotic assembly systems are widely used in industry to improve the production task. However when they halt their operation due to a failure, it usually takes considerable time to diagnose the system. In this paper, we discuss the results of an approach which uses Virtual Factories to reduce the time spent on diagnosis. The approach proposes building a virtual model of the system and simulating...

The success of Ambient Intelligence (AmI) will depend on how secure it can be made, how privacy and other rights of individuals can be protected and how individuals can come to trust the intelligent world that surrounds them and through which they move. This article addresses these issues by analysing scenarios for ambient intelligence applications that have been developed over the last few yea...

In this position paper, we describe three user scenarios that benefit from metadata based annotation infrastructure. We explain how a basic annotation schema can be extended to support new scenarios. We also describe and evaluate some other features and modifications that are useful when implementing these scenarios. The most laborious part in the scenarios is the design and implementation of n...

We study a model for language evolution which was introduced by Nowak and Krakauer ([12]). We analyze discrete distance spaces and prove a conjecture of Nowak for all metrics with a positive semidefinite associated matrix. This natural class of metrics includes all metrics studied by different authors in this connection. In particular it includes all ultra-metric spaces. Furthermore, the role o...