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25.03.2010

Slimsopp viser kollektiv intelligens

Slimsopp (egentlig ikke sopp, men amøber) er et mye brukt eksempel på emergens i naturen.

Nedenfor et utdrag fra en artikkel i Wired, som viser til et eksperiment publisert i det vitenskapelige tidsskriftet Science.

Slimsoppene klarer å organisere seg på en svært kompleks måte. Det til tross for at de ikke styres av noen sentral instans. Kollektiv adferd oppstår som et resultat av enkle regler for kommunikasjon.

Slime molds have evolved to produce some of the most efficient networks seen in nature, but just how good are they? As good as the notoriously complex Tokyo rail system.

The slime mold Physarum polycephalum forms networks between food sources that are as efficient and fault tolerant as anything we can design. In order to test quite how good the mold is, and if it could be used to help human planning, a group of Japanese and British scientists pitted it against the Tokyo rail system, and found a surprisingly efficient result.

The scientists created a simulacrum of the area surrounding Tokyo, and placed the mold directly on the location of the city itself. Neighboring cities were marked by food sources. In order to replicate the geographical limitations of the area (mountains and lakes), light was used to create regions the mold would avoid, as it doesn't like illumination.

The mock-map was 17cm wide, and over the course of 26 hours, the mold spread out evenly, colonized each of the food sources, and then refined itself down to a network of tubes.



What Slime Molds And Subways Have In Common, According to Scientists

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