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27th Colloquium of Systems Science

Winter Semester 2020/21

The colloquium takes place only in the winter semester on Wednesdays from 16:15 to 18:00. The 27th colloquium will become a virtual event due to the Covid-19 pandemic.

Programme

21 Oct 2020

NN: tba.

 

28 Oct 2020

NN: tba.

 

04 Nov 2020

NN: tba.

 

11 Nov 2020

Prof. Dr. Andreas Beyer, Institute of Genetics, CECAD Research Center, University of Cologne: tba.

 

18 Nov 2020

Dr. Volker Berding, The German Federal Environmental Foundation: tba.

 

25 Nov 2020

Dr. Ivo Siekmann, Department of Applied Mathematics, Liverpool John Moores University:
Listening to the whispers within our cells - Mathematical modelling of calcium dynamics.

 

02 Dec 2020

Prof. Dr. Jamie Linton, GEOLAB – Géographie Physique et Environnementale, Université de Limoges:
Nature, people, and the Water Framework Directive.

 

09 Dec 2020

Prof. Dr. Lena Partzsch, Chair Group of Sustainability Governance, University of Freiburg:
Alternatives to multilateralism: New forms of social and environmental governance.

 

16 Dec 2020

NN: tba.

 

06 Jan 2021

NN: tba.

 

13 Jan 2021

NN: tba.

 

20 Jan 2021

Prof. Dr. Sergei V. Petrovskii, Department of Mathematics, University of Leicester:
Modelling corona virus infection and data analysis.

 

27 Jan 2021

Prof. Dr. Sheona Shackleton, Deputy Director, African Climate and Development Initiative, University of Cape Town:
Developing adaptive responses to deal with the challenges of Climate Change in South Africa.

 

03 Feb 2021

NN: tba.

 

 

 

Abstracts of Presentations

25 Nov 2020
Dr. Ivo Siekmann, Department of Applied Mathematics, Liverpool John Moores University

Listening to the whispers within our cells - Mathematical modelling of calcium dynamics
The dynamics of calcium concentrations in living cells has strong similarities with the electrical activity in the brain. Whereas local calcium spikes that vanish as quickly as they appear resemble the firing of neurons, the regular oscillations of calcium concentration across the whole cell remind us of the patterns seen in electroencephalograms (EEGs).
Similar to how neurons communicate with each other and broadcast signals across our body using electrical currents, signals within cells are transmitted via calcium signals. Calcium signals are generated by ion channels which, by opening and closing stochastically, release calcium from internal stores into the cell. Although each individual ion channel is stochastic, cells nevertheless behave deterministically – one of the most striking examples is the heartbeat which is reliably generated approximately every second for a whole lifetime. However, as difficult as it has been to relate the stochastic firing of individual neurons to the global electrical activity of the brain, it remains challenging to understand how calcium signals across the whole cell depend on the properties of individual ion channels.
In my talk I will explain how calcium dynamics can be modelled mathematically and how models can be parameterised with experimental data. I will also tell you of some of the discoveries that my collaborators and I made along the way.

02 Dec 2020
Prof. Dr. Jamie Linton, GEOLAB – Géographie Physique et Environnementale, Université de Limoges:

Nature, people, and the Water Framework Directive.

09 Dec 2020
Prof. Dr. Lena Partzsch, Chair Group of Sustainability Governance, University of Freiburg

Alternatives to multilateralism: New forms of social and environmental governance
Globalization has lost its shine. While the worldwide integration of markets has drained political control from individual nation-states, multilateralism has proven unsuccessful in coordinating states' responses to global challenges. In this lecture, Lena Partzsch describes alternatives to multilateralism, offering analyses and case studies of emerging—alternative—forms of private, public, and hybrid social and environmental regulation. She presents her case study research on cotton/textile supply chains and voluntary (private) certification in Ethiopia; public supply-chain regulation of “conflict resources” from the Democratic Republic of the Congo; and hybrid governance of palm oil production in Indonesia. Partzsch finds that there is a new entanglement of public and private regulation. This entanglement fails to address social and environmental considerations in mainstream markets. Only in exceptional cases do alternative forms of regulation overcome the power asymmetries between actors in the consuming countries of the Global North and those in the producing countries of the Global South. While the paradigm of free trade fades, we must continue to develop viable alternatives in order to pursue collective norms of environmental sustainability and social justice.

Partzsch, L. (2020) Alternatives to Multilateralism: New Forms of Social and Environmental Governance, MIT Press, Cambridge, MA, mitpress.mit.edu/books/alternatives-multilateralism 

20 Jan 2021
Prof. Dr. Sergei V. Petrovskii, Department of Mathematics, University of Leicester

Modelling corona virus infection and data analysis.

27 Jan 2021
Prof. Dr. Sheona Shackleton, Deputy Director, African Climate and Development Initiative, University of Cape Town:

Developing adaptive responses to deal with the challenges of Climate Change in South Africa.

Archive: Previous Colloquia