The Taliban’s 80,000 troops have retaken Afghanistan with cities falling like dominos while the 300,000-strong government forces, better equipped and trained, mostly melted and surrendered with no will to fight. Why did it happen?
Teko is a package for development and implementation of block preconditioners. This includes support for manipulation and setup of block operators. Furthermore tools exist to support decomposition of a fully coupled operator. Additionally, facilities that allow the construction of approximate inverse operators using the full complement of available preconditioners and solvers are available in Teko. Finally, a small number of generic block preconditioners has been implemented in Teko, including block Jacobi, and block Gauss-Seidel. For the Navier-Stokes equation, Teko has implementations of SIMPLE, PCD and LSC. For details on these methods see Stabilization and Scalable Block Preconditioning for the Navier-Stokes Equations and the references therein
Yuri Gagarin gained worldwide fame as the first man in space. But the unsung hero of the Soviet Union's triumph was a brilliant scientist called Sergei Korolev. Korolev remained in the shadows throughout his career and was only revealed to have masterminded the USSR's rocket wizardry after his death in 1966. Guest: Stephen Walker, author of Beyond: The Astonishing Story of The First Human to Leave Our Planet and Journey into Space (published by Harper Collins)
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M. Griffith, J. Leontini, M. Thompson, und K. Hourigan. Journal of Fluids and Structures, 27 (5):
855-860(2011)IUTAM Symposium on Bluff Body Wakes and Vortex-Induced Vibrations (BBVIV-6).