A new approach for the realization of self-adaptive and highly available production systems based on a context aware approach, allowing selfadaptation of flexible manufacturing processes in production systems and effective knowledge sharing to support maintenance, is presented. The usage of dynamically changing context as basis for adaptation of flexible manufacturing lines/processes and effect...

This article proposes a new performance index called Transit Service Indicator (TSI), which could be used as a comprehensive measure for quantifying the quality of service of a transit system. TSI integrates multiple performance measures (e.g., service frequency, hours of service, route coverage, and travel time components) within a systematic framework. It takes into account spatial and tempor...

When business processes depend on the processing capabilities within a data center, the typical system architecture use a high-availability setup to maintain a high level of service. Faced with a specific machine-tomachine system consisting of many endpoints that collect and forward data to the data center we argue that the dependability of the overall system does not necessitate a high level o...

  Network and processing overhead associated with web services is a significant challenge to its performance. As a result, web service providers often announce a service level agreement. This ensures that consumers, who pay for the service, can get the service at a given quality level. In this paper, we study the competition between two providers offering functionally the same web services, whe...

In this paper, we discuss how Quality-of-Service (QoS) can be handled in the Model-Driven Architecture (MDA) approach. In order to illustrate our discussion, we consider the introduction of availability and dynamic reconfiguration QoS concepts at platform-independent level. We discuss the consequences of the introduction of these concepts in terms of the realizations of platformindependent mode...

This study proposes a systems-level approach to airport and runway availability assessments and prediction, and addresses the problem of the aging or continuously degrading aviation infrastructure. Although the availability block diagrams are often used in the availability assessment of aerospace and electronic systems, their application to the airport availability problem on a systemlevel, dev...

Service-oriented computing is dynamic. There may be many possible service instances available for binding, leading to uncertainty about where service requests will execute. We present a novel Markovian process calculus which allows the formal expression of uncertainty about binding as found in service-oriented computing. We show how to compute meaningful quantitative information about the quali...

Cloud computing focuses on delivery of reliable, Fault-tolerant and scalable infrastructure for hosting Internet based application services. Cloud computing has become a new age technology that has got huge potentials in enterprises and markets. Clouds can make it possible to access applications and associated data from anywhere. Resource allocation is one of the important challenges in cloud c...

Low-income countries are plagued by a high burden of preventable and curable disease as well as unmet need for healthcare, but detailed microeconomic evidence on the relationship between supply-side factors and service use is limited. Causality has rarely been assessed due to the challenges posed by the endogeneity of health service supply.In this study, using data from Mozambique, we investiga...

This paper deals with the problem of finding a comprehensive dependability measure or figure of merit for computing systems. Dependability is a term used for a general description of a systems trustworthiness in non-quantitative terms. It is commonly described by a number of aspects, like reliability, availability, safety and security. Quantitative measures are conveniently used for e.g. reliab...