19.04.2018 
Mark Curran, Freie Universität Berlin 
The Hysteretic Limit of a Partial Differential Equation with a Small Parameter 
We consider a reactiondiffusion equation with an ensemble of hysteresis operators defined at every spatial point.
We associated to this PDE in one variable, a system consisting of one PDE and an ensemble of ODEs defined at every spatial point.
More specifically, we replace each of the individual hysteresis operators in the original PDE with a Van der Pol oscillator.

26.04.2018 
Poster preliminary discussion SFB910 


03.05.2018 
Paul Diekwisch, Free University Berlin 
The Global Attractor Conjecture  The subtle difference between global and local asymptotic stability.

Yuya Tokuta, Free University Berlin 
Turing instability of bioconvection generated by Euglena gracilis

Microorganisms are known to form spatiotemporal patterns similar to those formed in the RayleighBénard model for thermal convection. Among such, Euglena gracilis form
distinct patterns induced by phototaxes and sensitivity to the gradient of the light intensity. Mathematical analysis of patterns under
stationary and oscillatory illumination conditions is in progress and we will discuss Turing instability of the system. 
17.05.2018 
Nicola Vassena, Free University Berlin 
Sensitivity of Chemical Reaction Networks: metabolite perturbation 
In my previous talks we have addressed and analyzed  under various aspects  the network response to small perturbations of REACTION FLUXES, at equilibrium.
In the talk of today I will introduce the absolutely new topic of METABOLITE perturbation. We consider namely small perturbations of the metabolite concentration itself and we investigated possible results, as well as underline different and common aspects with the already developed theory.

24.05.2018 
Nicola Vassena, Alejandro Lopez Nieto, and Isabelle Schneider (FU Berlin) 
Spatiotemporal patterns: control, delays, and design 
We present our poster for the upcoming review of SFB 910. Everyone is invited to ask question and give constructive criticism!

31.05.2018 
JiaYuan Dai 
Stability and delay feedback control of GinzburgLandau spiral waves 
In my thesis I have proved the existence of countably many bifurcation curves of GinzburgLandau spiral waves, and only those waves associated with the principal bifurcation curve are possibly linearly stable; see [1]. In this talk we focus on the principal bifurcation curve, and aim at proving that onearmed spiral waves are linearly stable, while multiarmed spiral waves are linearly unstable. Then we discuss how to stabilize the linearly unstable spiral waves by introducing noninvasive delay feedback control, based on the control triple method in [2].
[1] J.Y. Dai (2017). Spiral Waves in Circular and Spherical Geometries: The GinzburgLandau Paradigm. Dissertation Thesis, Free University of Berlin
[2] I. Schneider (2016). Spatiotemporal feedback control of partial differential equations. Dissertation Thesis, Free University of Berlin

14.06.2018 
SFB 910: poster presentation practice 

28.06.2018 
Sarah Loos (Technische Universität Berlin) 
Stochastic thermodynamics of delayed noisy systems 
Stochastic thermodynamics provides a consistent description of a wide class of Langevin systems, but the Markov assumption is often crucial [1]. However, timedelayed feedback control  which commonly arises, e.g., in biological processes and technical applications  renders stochastic dynamics nonMarkovian [2]. Therefore, some basic concepts need to be revisited [3].
In this talk, I will first review the Langevin and FokkerPlanck equation, and discuss issues arising in the presence of a time delay. Then I will introduce thermodynamic definitions and discuss the application to delayed systems. To this end, I will also introduce a Markovian embedding technique [4], which is a promising candidate to calculate the total entropy production in nonMarkovian systems.
[1] U. Seifert, Rep. Prog. Phys. 75, 126001 (2012).
[2] S. A. M. Loos and S. H. L. Klapp, PRE 96, 012106 (2017).
[3] M. L. Rosinberg, T. Munakata, G. Tarjus, PRE 91, 042114 (2015).
[4] A. Crisanti, A. Puglisi, D. Villamaina, PRE 85, 061127 (2012).

12.07.2018 
Ismail Yenilmez (FU Berlin) (Free University, Berlin) 
Dynamical analysis of Keen's model

David Molle (FU Berlin) 
A Short Summary of my past Talks regarding the sunflower equation

I am going to give a short summary of the formerly presented material for my master thesis regarding the sunflower equation and its global attractor.

Ignacio Gonzalez Betegon (FU Berlin) 
Generic results in Networks

In this talk I will introduce the main Results of Roman Joly about couple cell Networks. These results hold for a generic subset of vector fields. In infinite dimensional spaces genericity is one of the analogous of almost everywhere. I would like to show some examples where the mentioned results do not hold.

19.07.2018 
Babette de Wolff (Universiteit Utrecht) 
Approximating delay equations by finite dimensional dynamical systems 
Delay differential equations (DDEs) are a type of differential equations that can be viewed as infinite dimensional dynamical systems, in the sense that their state space is an infinite dimensional Banach space.
In this talk, we study how we can approximate properties of DDEs by finite dimensional dynamical systems. This is for example of interest from a numerical point of view, since a wide range of numerical tools has been developed for the study of finite dimensional dynamical systems. In particular, we look at the pseudospectral method for DDEs, which is a technique that uses to idea of function approximation by polynomials, to approximate the (infinite number of) eigenvalues of DDEs by eigenvalues of ODEs.
