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= !QosCosGrid Infrastructure =
!QosCosGrid could be viewed as a ''quasi-opportunistic supercomputer'' whose computational performance exceeds the power offered by a single supercomputing or data center. !QosCosGrid is designed as a multi-layered architecture that is capable of dealing with computationally intensive large-scale, complex and parallel simulations that are usually too complex to run within a single computer cluster or machine. The !QosCosGrid middleware enables computing resources (at the level of processor cores) from different administrative domains to be combined into a single powerful computing resource via Internet. Clearly, bandwidth and latency characteristics of the Internet may have an affect on overall application performance of !QosCosGrid-enabled applications. However, the ability to connect and efficiently control advanced applications executed in parallel over the Internet is a feature that is highly appreciated by !QosCosGrid users.