Matti Heikkurinen

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The state of computer and networking technology today makes the seamless sharing of computing resources on an international or even global scale conceivable. Scientific computing Grids that integrate large, geographically distributed computer clusters and data storage facilities are being developed in several major projects around the world. This article(More)
Several Grid projects have been established that deploy a " first generation Grid ". In order to categorise existing projects in Eu-rope, we have developed a taxonomy and applied it to 20 European Grid projects funded by the European Commission through the Framework 5 IST programme. We briefly describe the projects and thus provide an overview of current(More)
Grid computing creates the illusion of a simple but large and powerful self-managing virtual computer out of a large collection of connected heterogeneous systems sharing various combinations of resources which leads to the problem of load balance. The main goal of load balancing is to provide a distributed, low cost, scheme that balances the load across(More)
ICT costs have been traditionally assessed using well-established methods such as full cost accounting or total cost of ownership. Within their specific, optimal application areas they provide very good tools for cost follow-up and strategic decision-making. However, as the scale and complexity of the system being analysed grows, these methods become less(More)
Cross-border trade inherently involves coordination of a highly complex community of actors belonging to groups with different priorities. This management complexity is further increased with the addition of ICT, which brings in obvious benefits but also hidden risks and challenges,. Federated 'CT management is a new discipline that has emerged to tackle(More)