CWI-page of Sjors van der Stelt

Office

Sjors van der Stelt
National Research Centre for Mathematics and Computer Science (CWI)
Department `Modelling, Analysis and Computation' (MAC)
Science Park 123
1098 XG Amsterdam
the Netherlands
Room L119

 Tel:  +31-20-592-4091

• Thesis

Research

• Pattern formation at Turing-Hopf bifurcations, Ginzburg-Landau Equations
• Numerical construction of Busse balloons with continuation software (AUTO), Hopf dances
• Slow-Fast Systems, (Geometric) Singular Perturbation Theory, Melnikov Methods
• Applications to models for semi-arid ecosystems in ecology

Publications

• S. van der Stelt, A. Doelman, G.M. Hek, Existence of travelling pulses in the Klausmeier model (working title, in preparation), 2011
• A. Doelman, J.D.M. Rademacher, M. Rietkerk, S. van der Stelt, A mathematical analysis of an extended Klausmeier model for semi-arid Ecosystems (working title, in preparation), 2011
• S. van der Stelt, A. Doelman, G.M. Hek, J.D.M. Rademacher, Rise and fall of periodic patterns for a Generalized Klausmeier-Gray-Scott model [ps], [pdf], 2011.
• A. Doelman, J.D.M. Rademacher, S. van der Stelt, Hopf Dances near the tips of Busse balloons [ps], [pdf], to appear in Discr. Cont. Dyn. Sys., 5-1 February 2012.
  

Proceedings and other:

• V.R. Ambati et al, Some Studies on the Deformation of the Membrane in an RF MEMS Switch, Proceedings of the Studygroup Mathematics with Industry 2008, 2009
• S. van der Stelt, Het duivenhokprincipe, Nieuwe Wiskrant 25-3, 2006 [in Dutch]

Nonmathematical:

• Sjors van der Stelt, Wiskundige patronen in de natuur. Hortuskrant 3, 2011.
• Hans van der Stelt, Sjors van der Stelt, H.M. van der Stelt-Strijbos, De Bomen in Artis en Hortus. Architectura en Natura Press, September 2010
  [(i) interview Parool Saturday 25 September, 2010 (ii) interview Amsterdam Alert on Amsterdam FM September 28, 2010 (iii) interview AT5 Nieuws October 6, 2010]
• Sjors van der Stelt, De Bomen in Artis en Hortus. Anekdotes en ontstaan. Arbor Vitae 21-1, February 2011 [in Dutch]

Talks

• Nederlands Mathematisch Congres April 14-15, 2011. Desertification: instabilities of patterns.
• Leiden University Dynamics seminar March 16, 2011. Stability of travelling waves: things I hope you will learn quicker than I did. Part 2: wave trains.
• Leiden University Dynamics seminar March 2, 2011. Stability of travelling waves: things I hope you will learn quicker than I did. Part 1: stationary patterns.
• Dynamics of Patterns Days November 15-16, 2010. Busse balloons for a generalized Gray-Scott model.
• Open Dag Science Park October 9, 2010. Onstaan en verdwijnen van patronen in ecosystemen [popularizing talk, in Dutch].
• CWI Scientific Meeting June 11, 2010. Rise and fall of patterns in models for semi arid ecosystems.
• Workshop Nonlinear Dynamics of Natural Systems April 13-16, 2010. Busse balloons: from the reversible Gray-Scott model to nonreversible Klausmeier models with nonlinear diffusion.
• SIAM Conference on Applications of Dynamical Systems ("Snowbird") May 17-21, 2009. Hopf dances in Busse balloons.
• Dynamics of Patterns Day May 9, 2009. A Busse balloon for the flat Klausmeier System.

Nonmathematical:

• Excursie Hortus Botanicus Amsterdam. Hortus Botanicus, Amsterdam, October 30, 2011.
• Lezing over De Bomen in Artis en Hortus. Nationaal Herbarium Nederland, Leiden, October 25, 2011.
• Excursion along Quercus palustris, Ginkgo biloba, Cercis siliquastrum and Sequoia sempervirens. Hortus botanicus Amsterdam, October 29, 2010.

Teaching at UvA (onderwijs) 2011

• Calculus II.
  Where: room D.115 (week no. 5-11) and room D116 (week no. 13-17 and 19)
  When: Thursday 11-13, week no. 5-19 (no course in weeks no. 12 and 18).
• Tutoraat Analyse I.
  Where: room G.114 (weeks no. 5-11) and room G.310 (weeks no. 13-20)
  When: Tuesday 11-13 (weeks no. 5-11) and Tuesday 15-17 (weeks no. 13-20).
• Wiskunde voor Informatica I.
  Where: room G.415 (week no. 13-17) and room F.102 (week no. 19-20)
  When: Tuesday 11-13, week no. 13-20 (no course in week no. 18).

AUTO Package