Sozopol June 2-6, 1999


Wednesday, June 2
Lecture Hall ALecture Hall B
09:00 - 09:15Opening
09:15 - 10:00O. Axelsson, M. Nikolova, On generalized conjugate gradient type methods for the iterative solution of nonsymmetric and/or indefinite systems of equations; some specific convergence properties
Coffee break
10:30 - 16:00Special Session on "Computations in image processing"
10:30 - 11:00M. Bertero, P. Boccacci and M. Robberto, Image Restoration in Thermal Infrared Astronomy
11:00 - 11:30P. Binev, Image processing via gradient based multiresolutional analysis
11:30 - 12:00A. Murli, M. Ceccarelli, L. D'Amore, V. De Simone, Numerical methods for Total Variation-based deblurring: a comparison in a parallel environment
Lunch break
15:00 - 18:30Special Session on "Matrices with sparsity structure"
15:00 - 15:30J. Kamm, J. G. Nagy, Kronecker product preconditioners in image restorationP. Arbenz, An efficient implementation of the eigenstate expansion method for quantum molecular dynamics simulations
15:30 - 16:00I. Arany, Generating some separators of the graph of a sparse symmetric matrix
16:00 - 18:30Special Session on "High performance computing in geosciences"
16:00 - 16:30B. V. Digas, V. I. Maksimov, L. A. Melnikova, Parallel algorithms for inverse problem of lithosphere structure reconstructionA. Brodnik, M. Kovac, S. Malovrh, Optimal representation of sparse matrices
Coffee break
17:00 - 17:30Zdenek Kestránek, H-version of the FEM for the contact problem in elasticityF. Mazzia, QMR and selective biorthogonalization
17:30 - 18:00R. Blaheta, R. Kohut, J. Starý, Iterative displacement decomposition solvers for HPC in geosciencesA. Ilahi, E. Traviesas, Pseudo-spectra and homotopic perturbations
18:00 - 18:30Tz. Kolev, S. Margenov, Algebraic multilevel preconditioning of elasticity non-conforming FEM systems
Thursday, June 3
Lecture Hall ALecture Hall B
08:30 - 09:15Z. Zlatev, Application of special sparse solvers in the chemical part of air pollution models
09:15 - 11:30Special Session on "High performance methods and algorithms for flow simulation in porous media"
09:15 - 10:00R. D. Lazarov, Coupling various approximation methods for convection-diffusion problems with applications to flows in porous media
Coffee break
10:30 - 18:00Special Session on "Large-scale computations in air pollution modelling"
10:30 - 11:00A. Mazzia, L. Bergamaschi and M. Putti, Triangular finite volume-mixed finite element discretization for the advection-diffusion equationC. Mensink, Multiblock domain discretization for urban and regional scale air pollution modelling
11:00 - 11:30Geir Åge Øye, Hilde Reme, Parallelization of a Compositional SimulatorAlison Tomlin, Richard Lowe, Low dimensional manifolds and reduced chemical models for air pollution simulations
11:30 - 12:00D. Syrakov, Long-term calculation of Hg pollution over South-East Europe due to Bulgarian sources
Lunch break
15:00 - 18:30Special Session on "Structured matrix computations"
15:00 - 15:30A. Böttcher, Eighteen old and new asymptotic results on Toeplitz band matricesR. Dimitrova, K. Ganev, Some examples of the mesoscale topography effects on large scale air pollution transport
15:30 - 16:00F. Di Benedetto, Matrix structures for image applications: some examples and open problemsR. Wolke, O. Knoth, The efficiency of different time integration schemes in relation to the used horizontal resolution
16:00 - 16:30M. Van Barel, P. Kravanja, On the generically superfast computation of Hankel determinantsI. Dimov, Tz. Ostromsky, I. Tzvetanov, Z. Zlatev, Economical estimation of the losses of crops due to high ozone levels
Coffee break
17:00 - 17:30V. Olshevski, Unified superfast algorithm for passive tangential confluent rational boundary interpolation problemsJ. Weickert, R. Wolke, Load-imbalances in the parallel implementation of the multiscale atmospheric chemistry-transport model MUSCAT
17:30 - 18:00S. Serra Capizzano, C. T. Possio, Preliminary remarks on preconditioning strategies for 2D collocation linear systemsK. Georgiev, Z. Zlatev, Some numerical experiments with the parallel version of the two-dimensional Danish Eulerian model
18:00 - 18:30D. Fasino, Isospectral flows for displacement structured matrices
Friday, June 4
Lecture Hall ALecture Hall B
08:30 - 09:15C. Brezinski, Multiparameter descent methods
09:15 - 10:00R. Plemmons, Numerical methods in aero-optics
Coffee break
10:30 - 11:00Y. Notay, Efficient preconditioning of convection-diffusion equationsB. C. Chapman, V. V. Toropov, L. F. Alvarez, Application of advanced optimization techniques to inverse problems of structural mechanics
11:00 - 11:30M. Neytcheva, O. Axelsson, 2D and 3D domain decomposition approaches for FE elliptic problemsS. Knapek, Optimized approximation spaces for operator equations
11:30 - 12:00M. Nikolova, Owe Axelsson, Error indicators for adaptive refinement of singularly perturbed convection-diffusion problemsV. John, G. Matthies, T.I. Mitkova, L. Tobiska, P.S. Vassilevski, A comparison of three solvers for the incompressible Navier-Stokes equations
Lunch break
Saturday, June 5
Lecture Hall ALecture Hall B
08:30 - 09:15D. Bini, B. Meini, Solving block banded block Toeplitz systems with structured blocks: new algorithms and open problems
09:15 - 10:00E. E. Tyrtyshnikov, Mosaic ranks for weakly semiseparable matrices
Coffee break
10:30 - 12:30Special Session on "Molecular modeling by high performance computational techniques"
10:30 - 16:30Special Session on "Large-scale computations for mechanical engineering problems"
10:30 - 11:00M. Aida, Modeling of reactivities of organic molecules by means of ab initio MD methodP.D. Minev, A semi-implicit projection algorithm for the Navier-Stokes equations with application to flows in complex geometries
11:00 - 11:30L. Gorb, Jerzy Leszczynski, Hydrogen bonding and tautomerism in isolated and hydrated DNA basesO. Iliev, M. Schäfer, On the efficiency of SIMPLE-type algorithms for computing incompressible flows on stretched grids
11:30 - 12:00M. Raimondi, A. Famulari, E. Gianinetti, M. Sironi, F. Moroni, Modification of Roothaan equations for the ab-initio calculation of interactions in large molecular systems in the absence of basis set superposition errorD. Stoyanov, O. Iliev, P. Stankov, On a multigrid solution of some 3D incompressible flow problems
12:00 - 12:30M. Ramek, C.-H. Yu, L. Schäfer, Ab initio conformational analysis of the model peptide N-formyl-L-alanine amide (For-Ala-Ala-NH2)
Lunch break
15:00 - 18:00Special Session on "Structured matrix computations"
15:00 - 15:30P. Yalamov, Stability results for varphi-circulant computationsG. Vatkova, S. Meynen, M. Schäfer, Numerical simulation of fluid-structure interaction in pipe-systems
15:30 - 16:00C. V.M. van der Mee, S. Seatzu, G. Rodriguez, Solution methods for perturbed semi-infinite linear systems of block-Toeplitz typeT. Chernogorova, O. Iliev, A 2nd order discretization of imperfect contact problems with piecewise constant coefficients on cell-centered grids
16:00 - 16:30G. Heinig, K. Rost, Representations of inverses of Toeplitz-plus-Hankel matricesJ.A. Denev, P.Stankov, F. M. B. Andersen, Practical aspects of the application of the discrete transfer method
Coffee break
17:00 - 17:30V. Baryamureeba, T. Steihaug, Computational issues for a new class of preconditioners
17:30 - 18:00I. Lirkov, S. Margenov, M. Paprzycki, Benchmarking performance of parallel computers using a 3D elliptic solver
Sunday, June 6
Lecture Hall A
08:30 - 09:00P. Georgieva, Structured singular value computation for matrices with real and complex perturbations
09:00 - 09:30D. Petcu, The potential for distributed computation in large initial value problems
09:30 - 10:00I. G. Ivanov, B. V. Mintchev, A method for solving special circulant pentadiagonal linear systems
Coffee break
10:30 - 11:00T. Todorov, M. Racheva, Two-level method for isoparametric problems
11:00 - 11:30T. Todorov, M. Racheva, Computational results for two-Level iterative scheme using isoparametric technique