Felix Flentge, Daniel Polani and Thomas Uthmann (2001)
Modelling the Emergence of Possession Norms using Memes
Journal of Artificial Societies and Social Simulation
vol. 4, no. 4
To cite articles published in the Journal of Artificial Societies and Social Simulation, please reference the above information and include paragraph numbers if necessary
Received: 30-Mar-01 Accepted: 30-Sep-01 Published: 31-Oct-01
|Figure 1: Structure of a simulation step|
|Sugarscape Growback Rule Gα|
In each simulation step, the sugar content of a cell grows by α units until it reaches the maximum sugar capacity of the cell. α is an integer.
|Figure 2: The sugarscape landscape. The size of the dots is proportional to the sugar capacity of the cells.|
|Agent Movement Rule M|
|Agent Sex Rule S|
|Cultural Transmission Rule K|
|Movement Rule MS|
|Figure 3: The portion of agents with the movement gene. Agents with the gene perform rule MS, others rule M. Rules S and G1 are active, vision range and metabolism range from one to four.|
|Cultural Transmission Rule K+|
|initial sugar level||50-100||the amount of sugar the agents of the first generation get at birth; the following generations inherit their initial sugar from their parents|
|maximum age||60-100||the maximum number of simulation steps an agent lives; he may starve earlier if he does not collect enough sugar; children inherit the maximum age from one of their parents|
|male fertility start||12-15||the number of the simulation steps when the male/female fertility starts/ends; children inherit the fertility range from the parent with the same sex|
|male fertility end||50- 60|
|female fertility start||12-15|
|female fertility end||40-50|
|number of memes||11||the number of memes influence the probability for each single meme to be changed through cultural transmission; in our model only two memes have a special meaning|
|Figure 4: Frequency of survival without possession meme. The figure shows that number of the runs in which the agent population survived 2000 steps versus different metabolism rates and vision ranges|
|Figure 5: Frequency of survival with possession meme|
|Figure 6: Average number of agents in simulation runs with (poss.) and without (no poss.) meme and different vision ranges|
|Figure 7: Frequency of survival with active possession meme in 50% of the initial agent population|
|Figure 8: Population growth without possession meme, a metabolism of four and a vision range of six|
|Figure 9: Total population size (higher curve) and number of agents with possession meme (lower curve), metabolism four and vision range six|
|Figure 10: Frequency of survival with 50% possession meme, 100% sanction meme and a punishment of four|
|Figure 11: Frequency of survival with metabolism six, vision range reaches from two to ten, 50% possession meme, 100% sanction meme and various punishments|
|Figure 12: Frequency of survival with 50% possession meme, 50% sanction meme, punishment twelve and costs of four|
|Figure 13: Percentage of the possession meme and the sanction meme with costs four, metabolism four, and a vision range of six|
Role of the Memes
|Figure 14: Average time until the possession meme disappears with metabolism two and 50% possession meme at the beginning of the run|
|Figure 15: Frequency of survival without cultural transmission with 50% possession meme, 100% sanction meme and a punishment of four|
|Figure 16: Frequency of survival without cultural transmission with 50% possession meme, 50% sanction meme, punishment twelve and costs of four|
Executables (Win 95/98/NT), source code (Borland Delphi 4) and tables of all our experiments are accessible via <http://www.Informatik.Uni-Mainz.DE/~flentge/norm-sim_eng.html>
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