Scientific Homepage of Dr. Juergen Geiser

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Research Interests
Numerical Anlysis. Computational Analysis. Partial Differential Equations. Decomposition and Discretisation Methods for Hyperbolic and Parabolic Equations. Optimisation. Scientific computing. Interface Analysis

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Humboldt Address

Humboldt-University of Berlin
Department of Mathematics
Postal Address :
Department of Mathematics
Humboldt-University of Berlin
Unter den Linden 6
D-10099 Berlin, Germany
Office:
Room 2.421 (house 2, 4th floor)
Rudower Chaussee 25
D-12489 Berlin, Germany
Phone : +49 30 2093-5451
Mobile : +49 177 407 3748
Fax: +49 30 2093-5859
e-mail : geiser@mathematik.hu-berlin.de

Curriculum Vitae

Projects

Publications

Theses

  1. J. Geiser, Iterative Decomposition Methods for Differential Equations: Theory and Applications. Habilitation Thesis, Humboldt University of Berlin, Germany, under revision, January 2009.
  2. J. Geiser, Discretisation methods for systems of convective-diffusive-dispersive-reactive equations and applications. Doctor Thesis, University Heidelberg, Germany, 2004.
  3. J. Geiser, An examination of the ocillation at the sound-board on a cembalo : Reduction into 2 space-dimensions. Diploma thesis, Stuttgart, Germany, 1998.

Articles in Refereed Scientific Journals

  1. J. Geiser, P. Frolkovic, Discretization methods with discrete minimum and maximum property for convection dominated transport in porous media. Proceeding of NMA, 2002.

  2. J. Geiser, Numerical Simulation of a Model for Transport and Reaction of Radionuclides with an explicit coupling Method between Transport and Reaction. Proceeding of Algorithmy, 2002.

  3. J. Geiser, R.E. Ewing, J. Liu, Operator Splitting Methods for Transport Equations with Nonlinear Reactions. in: Computational Fluid and Solid Mechanics 2005, K.J. BATHE, ed., Elsevier, Amsterdam, 1105--1108, 2005.

  4. J.Santos, C.Ravazzoli and J.Geiser On the static and dynamic behavior of fluid saturated composite porous solids: A homogenization approach. International Journal of Solids and Structures, Volume 43, Issue 5, 1224-1238, 2006.

  5. R.Sinha and J.Geiser, Error estimates for finite volume element methods for convection-diffusion-reaction equations. Appl. Numer. Math., 57(1), 59--72, 2007.

  6. I.Farago, J.Geiser, Iterative Operator-Splitting Methods for Linear Problems. International Journal of Computational Science and Engineering , 3(4): 255-263, 2007.

  7. J. Geiser, Discretization methods with embedded analytical solutions for convection-diffusion dispersion-reaction equations and applications. Journal of Engineering Mathematics, Volume 57, Number 1, 79-98, 2007.

  8. J. Geiser, O. Klein, P. Philip, Numerical simulation of temperature fields during the sublimation growth of SiC single crystals, using WIAS-HiTNIHS. Journal of Crystal Growth, Vol. 303, Issue 1, 352--356, 2007, Proceedings of the Fifth Workshop on Modeling in Crystal Growth - IWMCG-5, [http://dx.doi.org/10.1016/j.jcrysgro.2006.11.350].

  9. J. Geiser, O. Klein, P. Philip, Transient numerical study of temperature gradients during sublimation growth of SiC: Dependence on apparatus design. Journal of Crystal Growth 297 (2006), 20 - 32.

  10. J. Geiser, O. Klein, P. Philip, Influence of anisotropic thermal conductivity in the apparatus insulation for sublimation growth of SiC: Numerical investigation of heat transfer. Crystal Growth & Design 6 (2006), 2021 - 2028.

  11. D. Daoud, J. Geiser, Overlapping Schwarz Wave Form Relaxation for the Solution of Coupled and Decoupled System of Convection Diffusion Reaction Equation. Applied Mathematics and Computations, Elsevier, Elsevier, 190 (1), 946--964, 2007.

  12. J. Geiser, Operator splitting methods for wave equations. International Mathematical Forum, Hikari Ltd., Vol.2, no.43, 2141 - 2160, 2007.

  13. J. Geiser, Analytical solutions for convection-diffusion-dispersion-reaction-equations with different retardation-factors and applications in 2d and 3d. International Mathematical Forum, Hikari Ltd., Vol. 2, no. 44, 2179 - 2205, 2007.

  14. J. Geiser, Linear and Quasi-Linear Iterative Splitting Methods: Theory and Applications. International Mathematical Forum, Hikari Ltd., Vol. 2, no. 49, 2391 - 2416, 2007.

  15. J. Geiser, Iterative Operator-Splitting Methods with higher order Time-Integration Methods and Applications for Parabolic Partial Differential Equations. Journal of Computational and Applied Mathematics, Elsevier, Amsterdam, The Netherlands, 217, 227-242, 2008.

  16. J. Geiser, A Numerical Investigation for a Model of the Solid-Gas Phase in a Crystal Growth Apparatus. Communications in Computational Physics (CiCP), Global Science Press, Vol.3, No. 4, 913--934, 2008. [http://www.global-sci.com/freedownload/v3_913.pdf]

  17. J. Geiser, Higher-order difference and higher-order splitting methods for 2D parabolic problems with mixed derivatives. International Mathematical Forum, Hikari Ltd., Vol. 2, No. 67, 3339-3350, 2007.

  18. J. Geiser and Chr. Kravvaritis, A Domain Decomposition method based on iterative Operator Splitting method. Applied Numerical Mathematics, 59, 608-623, 2009.

  19. J. Geiser, O. Klein and P. Philip, A finite volume scheme designed for anisotropic heat transfer in general polyhedral domains. Advances in Mathematical Sciences and Application, Gakkotosho Tokyo, Japan, vol. 18, No. 1, 43-67, 2008.

  20. J. Geiser and S. Sun, Multiscale Discontinuous Galerkin Methods and Operator-Splitting Methods for Modeling Subsurfaces Flow and Transport. Special Issue, International Journal for Multiscale Computational Engineering, Begell House Inc., Redding, Connecticut, USA, Vol. 6, Iss. 1, 2008.

    J. Geiser, Analytical and Numerical solutions for Convection-Diffusion-Dispersion-Reaction Equations with general Initial-Conditions: Theory and Applications. In: Groundwater Modelling, Management and Contamination, Editors: L.F. Konig and J.L. Weiss, Nova Science Publishers, Inc., New York, USA, 217-247, 2008.

  21. J. Geiser, Discretization methods with analytical solutions for a convection-reaction equation with higher-order discretizations. International Journal of Computer Mathematics, Taylor and Francis, New York, Vol. 86, Iss.1, 163-183, 2009.

  22. J. Geiser, A posteriori error estimate for finite volume approximations of nonlinear heat equations. Mathematical Sciences, Islamic AZAD University-Karaj Branch, vol.1, no. 3, 19-32, 2007.

  23. J. Geiser and Chr. Kravvaritis, Overlapping operator splitting methods and applications in stiff differential equations. Special issue: Novel Difference and Hyprod Methods for Differential and Integro-Differential Equations and Applications, Guest editors: Qin Sheng and Johnny Henderson, Neural, Parallel, and Scientific Computations (NPSC), 16, 189-200, 2008.

  24. J. Geiser, Operator-Splitting Methods Respecting Eigenvalues Problems. Special issue: Novel Difference and Hyprod Methods for Differential and Integro-Differential Equations and Applications, Guest editors: Qin Sheng and Johnny Henderson, Neural, Parallel, and Scientific Computations (NPSC), 16, 225-236, 2008.

  25. J. Geiser, Discretization methods with analytical characteristic methods. Mathematical Sciences, Islamic AZAD University-Karaj Branch, accepted February 2008.

  26. J. Geiser and M.Arab, Modelling for Chemical Vapor Deposition: Meso- and Microscale Model. International Journal of Applied Mathematics and Mechanics (IJAMM), Hong Kong, China, accepted March, 2008.

  27. J. Geiser, Overlapping Operator Splitting Methods and Applications in Convection-Diffusion Equations. WASET, EEEng, accepted March, 2008.

  28. J. Geiser, Discretisation and Solver Methods with Analytical Methods for Advection-Diffusion-reaction Equations and 2D Applications. Journal of Porous Media, Begell House Inc., Redding, USA, vol 12, iss. 7, 613-638, 2008.

  29. J. Geiser, R. Roehle, Simulation of a multi-component transport model for the chemical reaction of a CVD-process. WASET, EEEng, Vol. 2, Nr. 2, 86-94, 2008. [http://www.waset.org/ijms/v2/v2-2-16.pdf]

  30. J. Geiser, Iterative Operator-Splitting Methods for Stiff Problems in Complex Applications. Journal of Convergence Information Technology, Korea, Vol.3, No.1., March, 2008.

  31. J. Geiser, A fourth order method for time-dependent differential equations. Numerical Mathematics: Theory, Methods and Applications, Global science press, Hong Kong, China, 1(3), 321-339, 2008.

  32. J. Geiser, Operator-Splitting Methods Respecting Eigenvalue Problems for Convection-Diffusion and Wave Equations. International Journal of Applied Mathematics and Mechanics (IJAMM), Hong Kong, China, accepted April, 2008.

  33. J. Geiser and M. Arab, Modelling, Optimzation and Simulation for a Chemical Vapor Deposition. Journal of Porous Media, Begell House Inc., Redding, USA, 12(9): 847-867, 2009.

  34. J. Geiser, Consistency of Iterative Operator-Splitting Methdod: Theory and Applications. NMPDE, published online, 2009, http://www3.interscience.wiley.com/journal/107630294/issue. 2008.

  35. J. Geiser, Stability of Iterative Operator-Splitting Methdods. International Journal of Computer Mathematics, 1029-0265, First published on 26 June 2009, http://www.informaworld.com.

  36. J. Geiser, Discretization methods with analytical characteristic methods and applications. M2AN, EDP Sciences, France, vo. 43, no. 6, 27pp, November 2009.

  37. J. Geiser and M. Arab, Simulation for Chemical Vapor Deposition: Thin-layer geometry. International Journal of Applied Mathematics and Mechanics (IJAMM), Hong Kong, China, 4(6): 78 - 104, 2008.

  38. J. Geiser, Operator-Splitting methods respecting eigenvalue problems for convection diffusion and wave equations. International Journal of Applied Mathematics and Mechanics (IJAMM), Hong Kong, China, 4(5):93-104, 2008.

  39. J. Geiser, A Higher Order Splitting Method for Elastic Wave Propagation. International Journal of Mathematics and Mathematical Sciences, Hindawi Publishing Corp., New York, accepted November 2008.

  40. J. Geiser, R. Roehle, Modeling and Simulation for Physical Vapor Deposition: Multiscale Model. Journal of Convergence Information Technology, Korea, to be published, November 2008.

  41. J. Geiser, St. Irle, Macro- and Micro-Simulations for a sublimation growth of SiC single crystals. Mathematical Problems in Engineering, Hindawi Publishing Corp., New York, accepted, Volume 2009, Article ID 716104, 12 pages, 2009.

  42. J. Geiser, Modified Jacobian Newton Iterative Method with Embedded Domain Decomposition Method. Mathematical Problems in Engineering, Hindawi Publishing Corporation, New York, USA, vol. 2009, Art. ID 307298, 24 pages, doi:10.1155/2009/307298, 2009.

  43. J. Geiser, Chr. Fleck, Adaptive Step-size Control in Simulation of diffusive CVD Processes. Mathematical Problems in Engineering, Hindawi Publishing Corp., New York, accepted, January 2009.

  44. J. Geiser and M. Arab, Simulation of a Chemical Vapor Deposition: Mobile and Immobile Zones and Homogeneous Layers. Journal of Porous Media, Begell House Inc., Redding, USA, accepted March 2009.

  45. J. Geiser and M. Arab, Simulation for chemical vapor deposition: multiple channel geometry. Far East Journal of Mathematical Sciences (FJMS), Pushpa Publishing House, Allahabad, India, accepted April 2009.

  46. J. Geiser, Operator-Splitting Methods in Respect of Eigenvalue Problems for Nonlinear Equations and Applications to Burgers Equations. Journal of Computational and Applied Mathematics, Elsevier, Amsterdam, North Holland, accepted May 2009.

  47. J. Geiser, Mobile and immobile fluid transport: Coupling framework, International Journal for Numerical Methods in Fluids, accepted October 2009.

  48. J. Geiser, Fast computation of iterative operator-splitting methods, Advances and Applications in Mathematical Sciences, Mili Publications, India, accepted October 2009.

  49. J. Geiser, Iterative operator-splitting methods for nonlinear differential equations and applications. NMPDE, accepted November 2009.

  50. J. Geiser, Iterative operator-splitting with time overlapping algorithms: Theory and Application to constant and time-dependent wave equations. Chapter in Wave Propagation book, edi. V. Kordic, In-Tech, Austria, accepted November 2009.

Preprints in arxvic (http://arxiv.org)

  1. J. Geiser: Iterative operator-splitting methods for unbounded operators: Error analysis and examples, arXiv:0904.0160v1 (http://arxiv.org/abs/0904.0160), April 2009.

Articles in Conference Proceedings

  1. J. Geiser: Discretisation Methods with embedded analytical solutions for convection dominated transport in porous media Proceeding of Numerical Analysis and Applications, Third international conference, Rousse, Bulgaria, 2004, Lect.Notes in Mathematics,vol.3401,(2005),Springer, [article_naa04.ps].

  2. J. Geiser, O. Klein and P. Philip: WIAS-HiTNIHS: Software-tool for simulation in sublimation growth for SiC single crystal : Application and Methods. Proceeding of the International Congress of Nanotechnology and Nano, Oakland, San Francisco, USA, 2004.

  3. J. Geiser: Weighted Iterative Operator-Splitting Methods: Stability-Theory Proceedings of the 6th International Conference, NMA 2006, Borovets, Bulgaria, August 20-24, 2006, published in : Lecture Notes in Computer Science, Volume 4310, 40--47, 2007, [http://www.springerlink.com/content/y226q8170x0151w7/].

  4. J. Geiser, Chr. Kravvaritis: Weighted Iterative Operator-Splitting Methods and Applications Proceedings of the 6th International Conference, NMA 2006, Borovets, Bulgaria, August 20-24, 2006, published in : Lecture Notes in Computer Science, Volume 4310, 48--55, 2007, [http://www.springerlink.com/content/0110421l6018rlx4/].

  5. J. Geiser: Domain-DecompositionMethods for Parabolic Problems in Multi- dimensions with error-estimates Special Issue: GAMM Annual Meeting 2006 - Berlin, Wiley Interscience, Pamm, Vol. 6, Iss. 1 , 739--740, published 2007.

  6. J. Geiser, S. Sun: Multiscale Discontinuous Galerkin Methods for Modeling Flow and Transport in Porous Media Proceedings of the International Conference on Computational Sciences, Beijing, China, May 27-30, 2007, to appear in : Lecture Notes in Computer Science, Volume 4487, 890--897, 2007.

  7. Ion Chryssoverghi, Juergen Geiser: Descent-Penalty Methods for Nonlinear Elliptic Relaxed Optimal Control Problems Proceedings of the 6th International Conference on Large-Scale Scientific Computations, Sozopol, Bulgaria, June 5-9, 2007.

Preprints in WIAS, Weierstrass Institute for Applied Analysis and Stochastics, Germany


  1. D. Daoud, J. Geiser, Fractional-Splitting and Domain-Decomposition Methods for Multidimensional Parabolic Problems and Applications. Preprint No. 1096 of the Weierstrass Institute for Applied Analysis and Stochastics, Berlin, Germany, January 2006.

  2. J.Geiser, O.Klein, P.Philip, Transient Numerical Study of Temperature Gradients During Sublimation Growth of SiC : Dependence on Apparatus Design. Preprint No. 1080 of the Weierstrass Institute for Applied Analysis and Stochastics, Berlin, Germany, December 2005.

  3. I. Chrysoverghi, J. Geiser, Progressively Refining Penalized Gradient Projection Method for Semilinear Parabolic Optimal Control Problems. Preprint No. 1065 of the Weierstrass Institute for Applied Analysis and Stochastics, Berlin, Germany, November 2005.

  4. I.Farago, J.Geiser, Iterative Operator-Splitting Methods for Linear Problems. Preprint No. 1043 of the Weierstrass Institute for Applied Analysis and Stochastics, Berlin, Germany, June 2005.

  5. J.Geiser, O.Klein, P.Philip, Influence of anisotropic thermal conductivity in the apparatus insulation for sublimation growth of SiC: Numerical investigation of heat transfer. Preprint No. 1034 of the Weierstrass Institute for Applied Analysis and Stochastics, Berlin, Germany, May 2005.

  6. J.Geiser, O.Klein, P.Philip, Numerical simulation of heat transfer in materials with anisotropic thermal conductivity: A finite volume scheme to handle complex geometries. Preprint No. 1033 of the Weierstrass Institute for Applied Analysis and Stochastics, Berlin, Germany, May 2005.

Preprints in Humboldt Universitaet zu Berlin, Department of Mathematics, Germany


  1. J. Geiser, Discretization methods with analytical solutions for a convection-diffusion-dispersion-reaction-equations and applications in 2D and 3D for waste-scenarios. Preprint No. 2006-2 of Humboldt Universitaet zu Berlin, Department of Mathematics, Germany, February 2006.

  2. I.Chryssoverghi, J.Geiser, B.Kokkonis, and J.Coletsos, Discretization Methods for Nonlinear Elliptic Relaxed Optimal Control Problems. Preprint No. 2006-3 of Humboldt Universitaet zu Berlin, Department of Mathematics, Germany, February 2006.

  3. I.Chryssoverghi, J.Geiser, J.Al-Hawasy, Discretization Methods for Nonlinear Elliptic Optimal Control Problems with State Constraints. Preprint No. 2006-4 of Humboldt Universitaet zu Berlin, Department of Mathematics, Germany, February 2006.

  4. I.Chryssoverghi, J.Geiser, B.Kokkonis, and J.Coletsos, Discretization Methods for Nonlinear Parabolic Relaxed Optimal Control Problems. Preprint No. 2006-7 of Humboldt Universitaet zu Berlin, Department of Mathematics, Germany, February 2006.

  5. J. Geiser, Mixed discretisation methods for the Discontinuous Galerkin method with analytical test-functions. Preprint No. 2006-8 of Humboldt University of Berlin, Department of Mathematics, Germany, 2006.

  6. J. Geiser, J. Gedicke, Iterative Operator-Splitting Methods with higher order Time-Integration Methods and Applications for Parabolic Partial Differential Equations. Preprint No. 2006-10 of Humboldt University of Berlin, Department of Mathematics, Germany, 2006.

  7. J. Geiser, Chr. Kravvaritis, Weighted Iterative Operator-Splitting Methods for stiff problems and applications. Preprint No. 2006-11 of Humboldt University of Berlin, Department of Mathematics, Germany, 2006.

  8. J. Geiser , J. Gedicke, Nonlinear Iterative Operator-Splitting Methods and Applications for Nonlinear Parabolic Partial Differential Equations. Preprint No. 2006-17 of Humboldt University of Berlin, Department of Mathematics, Germany, 2006.

  9. J. Geiser, Quasilinear Iterative Operator Splitting Methods Preprint No. 2006-28 of Humboldt University of Berlin, Department of Mathematics, Germany, 2006.

  10. J. Geiser Discretization methods with analytical characteristic methods for advection-diffusion-reaction equations and 2d applications. Preprint 2007-05 of Humboldt University of Berlin, Department of Mathematics, Germany, 2007.

  11. J. Geiser, V. Schlosshauer, Operator-Splitting Methods For Wave-Equations. Preprint 2007-06 of Humboldt University of Berlin, Department of Mathematics, Germany, 2007.

  12. J. Geiser, St. Nilsson, A Fourth Order Split Scheme for Elastic Wave Propagation. Preprint 2007-08 of Humboldt University of Berlin, Department of Mathematics, Germany, 2007.

  13. J. Geiser, L. Noack, Iterative Operator-splitting methods for wave-equations with stability results and numerical examples. Preprint 2007-10 of Humboldt University of Berlin, Department of Mathematics, Germany, 2007.

  14. J. Geiser, Operator-Splitting methods with respect to Eigenvalue-problem for Wave-equations. Preprint 2007-12 of Humboldt University of Berlin, Department of Mathematics, Germany, 2007.

  15. J. Geiser, Discretization methods with analytical solutions for a convection-reaction equation with higher-order discretizations. Preprint 2007-16 of the Humboldt University of Berlin, Department of Mathematics, Germany, 2007.

  16. J. Geiser, Modeling for Chemical Vapor Deposition. Preprint 2007-19 of the Humboldt University of Berlin, Department of Mathematics, Germany, 2007.

  17. J. Geiser, Chr. Kravvaritis, Modified Jacobian Newton Iterative Method with Embedded Domain Decomposition Method. Preprint No. 2007-23 of the Humboldt University of Berlin, Department of Mathematics, Germany, 2007.

  18. J. Geiser, Modelling for Chemical Vapor Deposition: Meso- and Microscale Model. Preprint No. 2008-01 of the Humboldt University of Berlin, Department of Mathematics, Germany, 2008.

  19. J. Geiser, L. Noack, Iterative operator-splitting methods for nonlinear differential equations and applications of deposition processes. Preprint 2008-4, Humboldt University of Berlin, Department of Mathematics, Germany, 2008.

  20. J. Geiser, Consistency of Iterative Operator-Splitting Methdod: Theory and Applications. Preprint 2008-5, Humboldt University of Berlin, Department of Mathematics, Germany, 2008.

  21. J. Geiser, Chr. Fleck, Adaptive Step-size Control in Simulation of diffusive CVD Processes. Preprint 2008-8, Humboldt University of Berlin, Department of Mathematics, Germany, 2008.

  22. J. Geiser, L. Noack, Operator-Splitting Methods Respecting Eigenvalue Problems for Nonlinear Equations and Application in Burgers-Equations. Preprint 2008-13, Humboldt University of Berlin, Department of Mathematics, Germany, 2008.

  23. J. Geiser, R. Roehle, Modeling and Simulation for Physical Vapor Deposition: Multiscale Model. Preprint 2008-14, Humboldt University of Berlin, Department of Mathematics, Germany, 2008.

  24. J. Geiser, St. Irle, Macro- and Micro-Simulations for a sublimation growth of SiC single crystals. Preprint 2008-15, Humboldt University of Berlin, Department of Mathematics, Germany, 2008.

  25. J. Geiser, Th. Zacher, Mobile and immobile gaseous transport: Embedded analytical solutions to finite volume methods. Preprint 2009-1, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  26. J. Geiser, M. Arab, Simulation of a Chemical Vapor Deposition: Four phase model. Preprint 2009-3, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  27. J. Geiser, S. Chin, Multi-product expansion, Suzuki's method and the Magnus integrator for solving time-dependent problems. Preprint 2009-4, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  28. J. Geiser, R. Steijl, Coupled Navier Stokes - Molecular Dynamics Simulation using Iterative Operator-Splitting Methods. Preprint 2009-11, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  29. J. Geiser, G. Tanoglu, Iterative Operator-Splitting Methods and Continuous and Discrete Case: Theory and Applications. Preprint 2009-13, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  30. J. Geiser, G. Tanoglu, Higher Order Operator-Splitting Methods via Zassenhaus product formula: Theory and Applications. Preprint 2009-15, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  31. J. Geiser, A. Jamneshan, Iterative operator-splitting with time overlapping algorithms: Theory and Application to constant and time-dependent wave equations. Preprint 2009-17, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  32. J. Geiser, F. Krien, Iterative operator-splitting methods for Time-irreversible Systems: Theory and Application to Advection-Diffusion Equations. Preprint 2009-18, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  33. J. Geiser, S. Blankenburg, Monte Carlo simulations concerning elastic scattering with application to DC and high power pulsed magnetron sputtering for Ti3 Si C2. Preprint 2009-20, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  34. J. Geiser, Computation of Iterative operator-splitting methods. Preprint 2009-21, Humboldt University of Berlin, Department of Mathematics, Germany, 2009.

  35. J. Geiser, R. Roehle Kinetic processes and Phase-transition of CVD processes for $Ti_3 Si C_2$. Preprint 2010-1, Humboldt University of Berlin, Department of Mathematics, Germany, 2010.

Talks and Presentations

Conference Talks

  1. J. Geiser: Discretisation Methods with embedded analytical solutions for convection dominated transport in porous media, Numerical Analysis and Applications, June 29 - July 3, Rousse, Bulgaria, 2004. [lecture_naa04.pdf].

  2. J. Geiser: WIAS-HiTNIHS: Software-tool for simulation in crystal growth for SiC single crystal : Application and Methods, The International Congress of Nanotechnology and Nano, November 7-11, San Francisco, USA, 2004. [lecture_ianano04.pdf].

  3. J. Geiser: Mixed Discretisation Methods for Convection- Diffusion-Reaction-Equations with Analytical-Test-Functions, SIAM Conference on Analysis of Partial Differential Equations (PD04), December 6-8, Houston, USA, 2004. [lecture_siam04.pdf].

Selected Talks at Colloquiums, Workshops, and Seminars

  1. Lecture in the Graduate-College for Nonlinear Analysis and Geometry, Mathematical Department, University of Augsburg, Germany : Modelling, Mathematical Background and Simulation of a waste-disposal for radioactive contaminants in a salt-dome, July 2004
  2. Lecture in the Graduate-College for Nonlinear Differential-equations, Mathematical Department, University of Freiburg, Germany : Discretisation Methods for Parabolic-Equations based on Finite-Volume- and related methods and Applications in Fluid- and Gas-Mechanics, October 2004. [freiburg04.pdf]
  3. Lecture in the Seminar for Scientific Computing, Center for Applied Scientific Computing, UC Lawrence Livermore National Laboratory, Livermore, USA : Simulation in crystal growth for SiC single crystal : Numerical Methods and Applications, November 2004. [llnl04.pdf]
  4. Lecture in the Seminar for Numerical Analysis and Optimisation, Mathematical Department, Technical University of Athen, Greek : Discretisation- and Optimisation methods for a Parabolic-Equation and application on simulation in crystal growth, December 2004. [athen04.pdf]
  5. Lecture in the Seminar for applied Analysis, Department of applied Analysis, Eotvos Lorand University, Faculty of Natural Sciences, Budapest, Hungary : Operator-Splitting methods and Discretisation of Parabolic-equations : Numerical Methods and Applications, May 2005. [buda05.pdf]
  6. Lecture in the Workshop for Analysis and Optimisation, Department of Applied Mathematics and Physics, National Technical University of Athens, Greece : Discretization-Optimisation Methods for Nonlinear Parabolic Optimal Control Problems : Theory and Applications, September 2005. [athen05.pdf]
  7. Lecture in the Seminar for Modelling and Computation, Department of Engineering, Queen Mary University of London, Great Britain : Operator-Splitting-Methods and Discretization-Methods for Nonlinear Parabolic Equations, September 2005.
  8. Lecture at Research-Seminar: Research Group Thermodynamic Modeling and Analysis of Phase Transitions, Weierstrass Institute for Applied Analysis and Stochastics, Berlin, Germany : Iterative Operator-Splitting Methods and Wave-Relaxation-Methods as effective Black-Box-Methods: Theory and Applications, December 2005.
  9. Lecture at ACDL-Seminar, Aerospace Computational Design Laboratory, Massachusetts Institute of Technology, Cambridge, USA : Iterative Operator-Splitting- and Waveform-Relaxation-Methods as effective Black-Box Solvers for Multi-Physical- and Multi-Scaling Problems, December 2005. [mit_1205.pdf]
  10. Lecture at Humboldt Universitaet zu Berlin, Department of Mathematics, Germany, : Iterative Operator-Splitting- and Domain-Decomposition Methods for Multi-Physical- and Multi-Scaling Problems, February 2006.
  11. Lecture at 77th Annual Meeting of the Gesellschaft fuer Angewandte Mathematik und Mechanik e.V. Technische Universitaet Berlin, Germany : Decomposition Methods for Parabolic Problems and Applications, March 27-31, 2006
  12. Lecture at Research-Seminar : Modeling, Numerics and Scientific Computing University of Erlangen-Nuernberg, Germany : Time- and space-decomposition methods as fast adaptive solvers: Theory and Applications in fluid dynamics, April 27, 2006
  13. 17 th International Conference on Domain Decomposition Methods St. Wolfgang/Strobl, Austria, July 3-7, 2006, Minisymposium of Martin Gander : Time-Decomposition Methods for Parabolic Problems : Convergence results of Iterative Splitting methods.
  14. 17 th International Conference on Domain Decomposition Methods St. Wolfgang/Strobl, Austria, July 3-7, 2006, Minisymposium of Ronald Hoppe and Ralf Kornhuber : Time- and Space-Decomposition Methods for Parabolic Problems and Applications in Multiphysics Problems.
  15. SIAM Annual Meeting, July 10-14, 2006, Bostoon Park Plaza Hotel, Boston Massachusetts, Minisymposium (MS 94) of Qin Sheng and Abdul Khaliq (Recent Trends in Splitting and Adaptive Methods for Differential Equations - Part II ) : Iterative Operator Splitting Methods As Effective Decomposition Methods For Multiphysics Problems: Theory And Application.
  16. Lecture at DMV-GDM Conference, March 2007, Humboldt Universitaet zu Berlin, Germany : Formal Solutions of partial differential equations based on modified additive and iterative operator splitting methods, March 2007.
  17. Lecture at 6 th International Congress on Industrial and Applied Mathematics, 16- 20 July, 2007, Zurich, Switzerland : Nonlinear Iterative Operator Splitting Methods, July 2007.
  18. Lecture at 6 th International Congress on Industrial and Applied Mathematics, 16- 20 July, 2007, Zurich, Switzerland : Seismic Sources and Waves using Iterative Operator Splitting Methods, July 2007.
  19. Research Seminar Optimization, (Prof. A.Griewank, Prof. Kummer), Humboldt University of Berlin, Germany, 25 January, 2008, Lecture with M. Arab: Modelling, Discretization and Optimization of CVD-Processes, January 2008.
  20. Workshop, (Prof. R.Nagel, University of Tuebingen, Germany), Encounters between Discrete and Continuous Mathematics, Blaubeuren, April 8-12, 2008 : Decomposition Methods, April 2008. [lecture_blau08.pdf]
  21. Seminar, (Prof. St. Vandewalle, University of Leuven, Leuven, Belgium), Numerical Analysis and Scientific Computing, 4 th June 2008: Decomposition Methods: Theory and Applications, June 2008. [lecture_bruessel08.pdf]
  22. Workshop, (Prof. Ostermann, Univeristy of Innsbruck, Innsbruck, Austria), Splitting Methods of Evolution Equations, 15-18th October 2009: Iterative splitting methods as time decomposition methods, October 2009.
  23. Seminar, (Prof. Roemisch, Humboldt Universitaet zu Berlin), Numerik stochastischer Modelle, 6th May 2009: Iterative splitting methods: Solver for differential equations, May 2009. [lecture_roemisch09.pdf]
  24. Numdiff 12, Conference in Halle, Germany, Splitting methods: Theory and Application, September 2009. [lecture_geiser09.pdf]

Poster Presentations

  1. J. Geiser, Mixed Discretisation Methods for Discontinuous Galerkin Methods with Analytical Test-functions, IMA, Minneapolis, USA, 2004. [mixed04.pdf]

  2. J. Geiser, Overlapping Operator-Splitting Methods and Applications to Stiff Differential Equations, 6 th International Congress on Industrial and Applied Mathematics, 16 - 20 July, 2007, Zurich, Switzerland. [poster_1.pdf]

  3. J. Geiser, P. Beckhaus. Es fliesst etwas, das ist sehr klein-Simulation der Nanobeschichtung metallischer Bipolarplatten, MIID 2008, 26.-28.10.08, Landschaftspark, Duisburg, Germany. [poster09.pdf]

Organized Minisymposiums

  • Discretization Methods with Finite Volumes, Discontinuous Galerkin Methods and the Application in Porous Media. Third M.I.T Conference on Computational Fluid and Solid Mechanics, June 14-17, 2005 at the Massachusetts Institute of Technology, Cambridge, USA.

    Own Lectures in this Minisymposium :
    Modified Discretization methods with embedded analytical Solutions based on Finite Volume and Discontinuous Galerkin Methods and Applications in Porous Media, MIT, Boston, USA, 2005. [discret_mit_05.pdf]
    Operator Splitting Methods for Transport Equations with Nonlinear Reactions, MIT, Boston, USA, 2005. [operator_mit_05.pdf]
    Discretisation Methods for Nonlinear Elliptic Optimal Control Problems, MIT, Boston, USA, 2005. [optim_mit_05.pdf]

  • Complex Models in Solid and Fluid Mechanics : Methods and Applications in Multi-physical and Multi-scaling Problems. US National Congress on Computational Mechanics, July 24-28, 2005, University of Texas at Austin, USA.

    Own Lectures in this Minisymposium :
    Discretisation and Solver Methods for Hyperbolic- and Parabolic-Equations based on Operator-Splitting and Finite-Volume-Methods : Theory and Applications in Fluid and Gas-Mechanics, USNCCM8, Austin, USA, 2005. [discret_aust05.pdf]
    Discretization Methods for Nonlinear Parabolic Optimal Control Problem, USNCCM8, Austin, USA, 2005. [crystal_aust05.pdf]
    Numerical Simulations of Sublimation Growth for SiC single Crystal : Anisotropy Materials, Radiation and Transient Heat Transfer, USNCCM8, Austin, USA, 2005. [optim_aust05.pdf]

  • Minisymposium Proposal (NR . IC/MP/043/S/4) : Extended Splitting methods for Partial Differential Equations : Theory and Application.
    Minisymposium Proposal (NR . IC/MP/025/S/37): Modeling and Numerical Methods for Multi-dimensional and Multi-physical problems.
    ICIAM07, International Congress on Industrial and applied Mathematics, 16-20 July, 2007, University and ETH Zurich Switzerland.


    See also the splitting web-page : Splitting in action

Teaching Experience

  • UG-School, Presentation of the Software-toolbox UG. University of Austin, 2004.

  • Partial Differential Equations,
    Lecture : Discretisation-Methods and Solver-methods for Parabolic Partial Differential Equations.
    Humboldt University, Berlin, Germany,
    Start : Fall-semester 2005/2006.

  • Computational Partial Differential Equations II,
    Lecture : Finite Volume methods and Multi-grid methods. (Together with S. Bartels and C. Carstensen)
    Humboldt University, Berlin, Germany,
    Start : Sommer-semester 2006.

  • Mathematics for computer scientists,
    Lecture : Nonlinear Algebra and linear Algebra. (Together with A. Griewank)
    Humboldt University, Berlin, Germany,
    Start : Winter-Semester 2006/2007.

  • Computational Partial Differential Equations I,
    Lecture : Finite Difference methods, Finite Element Methods, Adaptive methods and Finite Volume methods.
    Humboldt University, Berlin, Germany,
    Start : Winter-Semester 2006/2007.

  • Partial Differential Equations: Theory and Applications,
    Seminar : Numerical Analysis, Modelling and Simulations.
    Humboldt University, Berlin, Germany,
    Start : Sommer-Semester 2007.

  • Ordinary and Partial Differential Equations,
    Lecture: Modelling and Simulation of Real-Life Problems.
    Humboldt University, Berlin, Germany,
    Start : Winter-Semester 2008.

Books

  • Series: Groundwater Modelling, Management and Contamination, Nova Science Publishers, Inc. New York :
    Discretization and Simulation of Systems for Convection-Diffusion-Dispersion Reactions with Applications in Groundwater Contamination, Monograph, 2008, ISBN: 978-1-60456-612-3

  • Series: Groundwater Modelling, Management and Contamination, Nova Science Publishers, Inc. New York :
    Models and Simulation of deposition processes with CVD apparatus, Monograph, 2009, ISBN: 978-1-60692-325-2

  • Nova Science Publisher :
    Decomposition Methods in MultiPhysics and Multiscale Problems, Monograph, accepted, to be published Summer 2009.

  • CRC Press, Taylor and Francis Group :
    Decomposition Methods for Differential Equations: Theory and Applications, Chapman & Hall/CRC Numerical Analysis and Scientific Computing Series, edited by Magoules and Lai, 2009.

Fellowships

  1. Stipendium for a Visiting Professor at College-Station, Invitation from Dr. Richard Ewing, ISC, Texas A & M University (February-May 2004)

  2. Offer for a Research Collaboration at University of Rousse, Bulgaria, Invitation from Prof. L. Vulkov,
    (annual program for 2006 in porous media)

  3. Habiltiation-Stipendium of the Kalkhofen-Rose-Stiftung, Accademie of literature and science, Mainz, Germany,
    (annual program for 1.1.2007-31.12.2007)

  4. Research position of the BMBF-Project, Research Center Juelich (PtJ), Germany,
    Project: Metal-BiP, Nanocoating Metallic Bipolar Plate For PEFC,
    (Research Program for 01.07.2007 - 30.06.2010)

Memberships

  1. SIAM, Society for Industrial and Applied Mathematics, Academic Membership, (since September 2004)

  2. IANT, International Association of Nanotechnology, Academic Membership, (since November 2004)

  3. AMS, American Mathematical Society, Academic Membership, (since November 2006)

  4. BMS, Berlin Mathematical School, Junior Faculty Member, (since September 2009)

Editor and Referee

  1. Nova Science Publishers, Inc. New York, USA
    Editor for the Series: Groundwater Modelling, Management and Contamination,

  2. Elsevier, North Holland,
    Referee for the Journals:
    JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
    COMPUTER AND STRUCTRUES

  3. Begell House Inc., Redding, USA
    Referee for the Journals:
    Journal of Porous Media

  4. International Journal of Computer Mathemtics, Taylor and Francis, UK
    Referee since 2007.
    Section B: Computer Mathematics: Application,

  5. Journal of Electrochemical Society, Pennington, New Jersey, USA
    Referee since 2008.
    Section: Modelling and Simulations,

  6. Mathematical Reviews, Ann Arbor, MI, USA
    Reviewer since 2008.
    Section: Numerical Analysis,

Please let my know your interest and send your feedback to :
e-mail : geiser@mathematik.hu-berlin.de
Last update: January 2010 Juergen Geiser.