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Selected Presentations

Recent

2006

An Extensible Service Development Toolkit to Support Earth Science Grids, presented by Jason Cope, Henry Tufo, and Matthew Woitaszek at The 2nd IEEE International Conference on e-Science and Grid Computing, Amsterdam, Netherlands, December 2006.
Fault Tolerance of Tornado Codes for Archival Storage, presented by Matthew Woitaszek at the 15th IEEE International Symposium on High Performance Distributed Computing (HPDC 15), Paris, France, June 2006.
Grid-BGC: A Grid-Enabled Terrestrial Carbon Cycle Modeling System, poster presented by Jason Cope at the TeraGrid 2006 Conference: Advancing Scientific Discovery, Indianapolis, Indiana, June 14, 2006.
Improving Cluster Management with Scalable Filesystems, presented by Adam Boggs at the 7th LCI International Conference on Linux Clusters in Norman, OK, in May 2006.

This paper describes our work booting a PowerPC 970-based IBM JS20 Blade cluster using Lustre as a root file system.
Evaluation of RDMA Over Ethernet Technology for Building Cost Effective Linux Clusters, presented by Matthew Woitaszek at the 7th LCI International Conference on Linux Clusters in Norman, OK, in May 2006.

This presentation evaluates the performance of the Ammasso RDMA-over-Ethernet and TCP offload network adapter cards.
Grid-BGC: A Grid-Enabled Terrestrial Carbon Cycle Modeling System, presented by Jason Cope and Matthew Woitaszek at the Unidata Seminar Series, Boulder, CO, January 23rd, 2006.

Archived

2005

Shared Parallel Filesystems in Heterogeneous Linux Multi-Cluster Environments, presented by Matthew Woitaszek 2005 LCI Conference in Chapel Hill, North Carolina
Grid-BGC: A Grid-Enabled Terrestrial Carbon Cycle Modeling System, presented by Jason Cope at the NCAR CISL Exhibitor Presentations at IEEE Supercomputing 2005 (SC|05), Seattle, Washington, Novemeber 22nd and 23rd, 2005.
Grid-BGC: A Grid-Enabled Terrestrial Carbon Cycle Modeling System, presented by Jason Cope at The 11th European Conference on Parallel Processing (Euro-Par), Lisbon, Portugal, August 2005.
Experiences from Simulating the Global Carbon Cycle in a Grid Computing Environment, presented by Jason Cope at The Fourteenth Global Grid Forum (GGF 14), Chicago, Illinois, June, 2005.
Grid-BGC: A Grid-Enabled Terrestrial Carbon Cycle Modeling System, presented by Jason Cope at GlobusWORLD 2005, Boston, Massachusetts, February 2005.

2004

Comparing Linux Clustersfor the Community Climate System Model, presented by Matthew Woitaszek, Michael Oberg, and Henry Tufo at the 2005 LCI in Austin, Texas

2003

Partitioning with Space-Filling Curves on the Cubed-Sphere, presented by John Dennis, at the International Parallel and Distributed Processing Symposium held in Nice, France on April 26, 2003

Tutorials on Fourier, harmonic and related topics, presented by Paul Swarztrauber, June 2003:

Fourier Analysis and Related Topics. Much of the theory and analysis for computations on the sphere can be best understood in terms of comparable computations on the rectangle where Fourier theory and analysis apply.

Topics Discussed: trigonometric representation, spectral accuracy, nonperiodic functions, the discrete basis, aliasing, trig interpolation, interpolation error, alias control, two-thirds rule, subroutine EZFFT, using EZFFT, FFT for any N, staggered grids, complex transform, real in terms of complex, the FFT, multiprocessor FFTs, symmetric FFTs, fractional FFT, FFTPACK, accessing FFTPACK
Computing on the Sphere, Part I. Here we discuss the basic tools that are used for the spectral representation of scalar functions (such as temperature, pressure, divergence) on the sphere.

Topics Discussed: sphere vs rectangle, least squares representation, assoc. Legendre fns., double Fourier series, computing the ALFs, integration formulas, ALFPACK, Gauss points and weights, scalar harmonic analysis, generalized harmonic analysis, aliases and Aliasing, harmonic projectors, selecting a finite basis
Computing on the Sphere, Part II. Vectors on the sphere are discontinuous at the poles and therefore scalar spectral analysis of vectors is quite different than the analysis of scalars on a rectangle.

Topics Discussed: discontinuous vectors, vector harmonic analysis, unbounded derivatives, computing vorticity, divergence and gradients, bounded differential expressions, Robert's variables U and V, vector harmonics
Computing on the Sphere, Part III. Here we describe the spectral transform method for modeling geophysical fluids. Actually we discuss two popular methods plus the vector harmonic transform method and note that others exist. The methods are presented by application to the shallow water equations.

Topics Dicussed: vector harmonic method and attributes, Ritchie's U, V model (ECMWF), shallow water equations with bounded terms, vorticity and divergence (NCAR model), model results SPHEREPACK