The point availability is the probability that a system is available at time t. As grids need a lot of resources to be really operational, the evolution of their availability with time or depending on a maintenance process is a hot topic. But as grids contain a lot of resources, it is quite difficult to model and solve this problem. Here we advocate a component based description which is associ...

This paper proposes an XDependency description model and language that can be used as part of a distributed integrity control system for XML data resources. The dependency description language allows relationships to be specified between XML data available from different organizations. The paper also includes a prototype agent-based system capable of enforcing distributed dependency relationshi...

1 Research Lab, Department of Modelling and Industrial Computing, Faculty Computer Science and Information Technology, Universiti Teknologi Malaysia. ABSTRACT For the past few years, it has been possible to buy a business application including transaction processing systems for such tasks as accounting, manufacturing, or human resources as a packaged product. Packages to do this collection of w...

The objective of this work is to improve the preventive maintenance processes used by the electricity distributions companies. This paper is focused on the maintenance of a transformation module in a mid-voltage electrical substation, specifically on the times and prices. Starting from actual data of a mid-voltage electrical substation for a specific transformation module, a Genetic Algorithm w...

This paper provides an optimization model based on Real Options (RO) and stochastic dynamic programming for the availability maximization of an offshore wind farm with prognostic capabilities. Alternative energy sources such as offshore wind turbines are promising technologies, but they are capital intensive projects, and the economics of the project depend heavily on the wind resources, and th...

The problem of repair and maintenance of complex systems, such as aircraft, cars and trucks is certainly a nontrivial task. Maintenance technicians must use a great amount of knowledge and information resources to solve problems that may occur. This paper describes a semi-automated tool that sorts through the mass of information a maintenance technician must consult in order to make a repair, t...

introduction: nowadays, medical equipment is essential to provide health care services in hospitals. since 20% of the hospitals costs are devoted to providing such equipment, an appropriate management is required to maintain it. in this study it is intended to investigate the maintenance management of medical equipment in hospitals. methods and materials: it is a cross-sectional study. the popu...

The impacts of two factors on future regional-scale runoff were assessed: the external factor of climate change and the internal factor of a recently completed large-scale water resources project. A rainfall-runoff model was built (using the Soil and Water Assessment Tool, SWAT) for the Geum River, where three weirs were recently constructed along the main stream. RCP (Representative Concentrat...

The Changing of the Guard, or Moving from Print to “E” with a new Financial Model. Johan Engelbrecht, Univ of Stellenbosch During the past decade academic libraries all over the world have been faced with escalating costs which made budgeting for information resources, and especially academic journals, a nightmare. Libraries in South Africa were no exception, and the matter was made worse by th...

Ci rcumscr ip t i on on the one hand and autoepis-temic and defaul t logics on the other seem tohave qui te different characterist ics as formalsystems, which makes i t d i f f icu l t to comparethem as formal iza t ions of defeasible connmon-sense reasoning. In th is paper we accomplishtwo tasks: (1) we extend the or ig ina l semanticsof autoepistemic logic to a lan...