Chapter 8: Result and Analysis
8.4 Single Base and Single Resource
8.4.1 No Message
Stigmergic Style: This had a massive increase suddenly for generation 7. This was unsurprising surprise as it could be explained by the agents bumping into the base and spreading the message of its location quickly before the lifespan of the agents ran out.
Both Styles: This had more erratic behaviour than SS with higher extremes. The behaviour was put to bumping into the base and the average collection of food units can be seen in appendix A.
There was emergence since the whole (WOM, SS and BS) was greater than the sum of its parts (NC) again with higher average fitness for the communicating styles than the non-communicating one.
8.4.2 20% Resource Results
Generations
Message Passing Style 0 1 2 3 4 5 6 7 8 9
No Communication 3965 4973 5475 5667 5511 5848 5905 5949 5669 5736 Word of Mouth 13779 12425 14560 9286 21315 12966 13121 10206 25228 17016 Stigmergic 13916 14192 17659 11779 9440 15742 17478 19488 16434 12652 Both Styles 14780 13180 10049 18766 22374 27289 13055 24829 26315 26165
Table 11: Average Fitness Results for the starting conditions “20% Resource” in “Single Base and Single Resource” Scenario
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Chapter 8: Result and Analysis
Analysis
No Communication: This style exhibited the same behaviour as a single resource for the same starting condition. Once again, this style was the lowest performer, demonstrating the sum of the parts. This style only has emergence due to the EA.
Word of Mouth: This had sporadic results. We believed it to have been because the agents having a location of a resource had more energy with which to explore and find the base. The behaviour is emergent since the agent level rules does not specify this behaviour in L1 and had been evolved by the system. The results became increasingly higher when collection occurred.
Stigmergic Style: This had the same sporadic results as WOM but with lower fitness scores for the points where it found a base.
Both Styles: This had the highest results in its swings and its lowest swings were much higher than the lowest swings for the other communication styles.
There was emergence due to the EA but also because there was surprising surprise that the agents managed to find the base by spreading out and walking randomly. This behaviour could have been evolved on purpose to locate the base.
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8.4.3 20% Resource and Base Results
Generations
0 1 2 3 4 5 6 7 8 9
No Communication 6633 7611 7344 7674 8315 7747 8600 8424 8744 10384 Word of Mouth 24201 43426 76560 103424 119482 130109 127361 134579 137367 131421 Stigmergic 23813 37720 59840 79801 90746 103328 103804 106184 107067 106443 Both Styles 24967 44445 77626 100955 113207 130422 130596 136074 136337 133892
Table 12: Average Fitness Results for the starting conditions “20% Resource and Base” in “Single Base and Single Resource”
Scenario
Figure 32: Graph of the different communication styles with the starting condition “20% Resource and Base” in the “Single Base and Single Resources” Scenario
Analysis
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Chapter 8: Result and Analysis
Stigmergic Style: This is the same sort of growth as was seen in WOM but with a lower fitness as the generations continue depicting that SS was not as good as WOM at passing messages of the base.
Both Styles: This had a similar evolutionary path as WOM but towards the peak of its growth, it dropped below WOM and at the height, it went above WOM.
The scores for this starting condition were much higher than previously seen. The highest before was 25 000 now it is closer to 140 000. There was emergence since the whole (WOM, SS and BS) was greater than the sum of the parts (NC). The one surprising aspect was how much lower SS was compared to WOM and BS.
8.4.4 20% Resource and 20% Base Results
Generations
0 1 2 3 4 5 6 7 8 9
No Communication 3982 5139 5269 5694 5909 5942 6101 5919 6683 6173 Word of Mouth 23865 43940 75834 98495 119046 122637 131040 135750 135919 139332 Stigmergic 23504 36768 61920 78482 92836 100728 96112 105636 101830 110628 Both Styles 25185 44590 78416 98750 117708 122826 131664 126556 128860 133618
Table 13: Average Fitness Results for the starting conditions “20% Resource and 20% Base” in “Single Base and Single Resource” Scenario
Figure 33: Graph of the different communication styles with the starting condition “20% Resource and 20% Base” in the
“Single Base and Single Resources” Scenario
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Analysis
No Communication: The scores for this style went down from the starting conditions 20% Resource and Base but were higher than that of just 20% Resource. This could have to do with the agents with
messages of a base stumbling upon a resource and proceeding to collect food thus improving the scores.
Word of Mouth: This had similar scores as BS until generation 7 where it diverged and was even higher than BS. This was surprising as it should not have been able to find messages faster than Both Styles.
Stigmergic Style: This had a similar evolution to the previous starting conditions, with slightly more oscillating toward its higher points. It was lower than the other two communicating styles (WOM and BS).
Both Styles: This style should have been much higher than the others having advantages of both message styles. It must have been predominantly using the direct message passing that WOM used to be able to achieve the same sort of results as WOM but the fact that it used stigmergy as well may have caused it to lose efficiency towards the end of the generations.
The emergence that was achieved showed the whole to be greater than the sum of the parts for this starting condition. The communicating styles achieved higher fitness values than that of NC and are deemed to be emergent.
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Chapter 8: Result and Analysis