Seminars at the Faculty of Informatics

Large-Scale PDE-Constrained Optimization on HPC Architectures: Applications, Algorithms and Software

The Faculty of Informatics is pleased to announce a seminar given by Olaf Schenk

DATE: Monday, May 9th 2011
PLACE: USI Università della Svizzera italiana, room A22, Red building (Via G. Buffi 13)
TIME: 09.30

One of the outstanding challenges of computational sciences is large-scale nonlinear parameter estimation governed by partial differential equations. These inverse problems are known as PDE-constrained optimization problems and are significantly more difficult to solve than PDE forward problems.  Ill-posedness in the optimization problem is tackled through regularization while the inclusion of inequality constraints is used to encode prior knowledge and thereby enable the algorithm to avoid many of the local minima (false solutions). In addition, achieving scalability for the optimization process on tens of thousands of multicore processors is a task that offers many research challenges. We will address these issues and will present parallel results both in two and three space dimensions from earth science and biomedical applications that illustrate the usefulness of the approach.

Olaf Schenk obtained a diploma degree in mathematics from the University of Karlsruhe (KIT), a PhD degree from ETH Zurich, and his habilitation in computer science from the University of Basel in 2010. His research interests concern algorithmic and architectural problems in the field of computational mathematics, scientific computing and high-performance computing. He has published more than 60 peer-reviewed book chapters, journal articles and conference contributions in the area of parallel and manycore algorithms for computational science. He received a highly-competitive IBM Faculty Award on Cell Processors for Biomedical Hyperthermia Applications in 2008 and was one of the finalist of the International Itanium Award in 2009 in the area of computational intensive applications. He served in the program committee of several international supercomputing conferences and workshops such as, the International Conference for High Performance Computing, Networking, Storage and Analysis (SC), the International Conference on High Performance Computing (HiPC) and the Swiss Speedup Workshop Series on High-Performance Computing.  He is an IEEE Senior Member, and a SIAM Member. He is currently the principal investigator for several research projects funded by SNF, CTI, HP2C or industrial research labs, among others from Intel and IBM Research.

HOST: Prof. Mauro Pezzè

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