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This material is based upon work supported by the National Science Foundation under Grant No. 0701566.

Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.


XiRel is developing a highly scalable, efficient and accurate adaptive mesh refinement layer for the Cactus Framework, based on the Carpet driver, and optimized and supported for numerical relativitists studying the physics of black holes, neutron stars and gravitational waves. New tools will be distributed as part of a freely available Einstein Toolkit providing an open code for black hole simulations and incorporating mechanisms to encourage code sharing, verification, and validation.

XiRel will create the basis for a modern, scalable cyberinfrastructure for the worldwide numerical relativity community, providing enabling software for highly scalable codes able to leverage today's petascale machines, to prepare for next generation architectures and computing paradigms, and to support effective collaboration. The development of the Cactus Framework will make these new capabilities available to many other disciplines, and will integrate with ongoing application-focused computer science research projects including dynamic data driven computing, optical networks, and data scheduling.