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EURO COIN DIFFUSION - a numerical study

EURO COIN DIFFUSION - a numerical study. Tommi Bergman , Antti Lauri, Anna Ruhala and Walter Rydman Department of Physical Sciences University of Helsinki Finland. THE METHOD. Basic idea: coins move from one country to another with travellers. Residence time algorithm was used.

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EURO COIN DIFFUSION - a numerical study

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  1. EURO COIN DIFFUSION- a numerical study Tommi Bergman, Antti Lauri, Anna Ruhala and Walter Rydman Department of Physical Sciences University of Helsinki Finland

  2. THE METHOD • Basic idea: coins move from one country to another with travellers. • Residence time algorithm was used. • Also known as BKL (Bortz, Kalos, Lebowitz), kinetic Monte Carlo. Transitions selected randomly according to probabilities: P1 P2 P3 P4 P5 P6 • Travel statistics from • European Union data (Eurostat).

  3. RESULTS • Time evolution of the percentage of the Austrian coins in the domestic coin population. • Effect of 5% annual replenishment.

  4. RESULTS • Time evolution of the percentage of the German, Italian and French coins in the Greek total coin population.

  5. RESULTS: 50% FOREIGN

  6. WHY? • Diffusion is physics, isn’t it? • It is very important to show common public that physics methods can be used in ”real life” applications. • Out of curiosity .

  7. SPECIAL THANKS Mikael Agopov for providing computer facilities. Summer hotel Hill for the electricity and coffee machine…

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