T. Ikegami and T. Hashimoto. Replication and diversity in machine-tape coevolutionary systems. In C. Langton and K. Shimohara, editors, Artificial Life V: Proceedings of the Fifth International Conference on Artificial Life, pages 426--433. MIT Press, 1997.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....noise are very stable so that there is no further development after they have appeared. To promote evolution 31 reaction systems can be encapsulated into cells (compartments) where substances are allowed to di#use. Ikegami and Hashimoto showed that this can result in complex, coevolutive behavior [67]. 3.5.3 Automata Reaction The automata reaction, developed by us [40] is based on a formal finite state automaton which is a mixture of a Turing machine and a command driven register machine. It has been inspired by Typogenetics [62] The automata reaction has been designed in consideration of ....

....example introduce randomly generated catalytic links between molecular sequences which may lead to a restructuring of the metabolic network. Another frequently used method is to introduce random point mutations (e.g. bit flips) in the structure of molecules. Examples are: machine tape chemistries [66, 67, 91, 129], assembler automata like Tierra [107] Avida [3] or Coreworld [103] Called passive mutation by Ikegami and Hashimoto [66, 67] 51 1e64b 246 246 1064a 24e 1064b 24e 24e 1e64a 246 1e64b 1064b 246 1064b 1064b 246 1e64a 24e 1e64a 1e64a 24e 1064b 246 1e64a 24e TDIR ID MOV CPON ....

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Takashi Ikegami and Takashi Hashimoto. Replication and diversity in machine-tape coevolutionary systems. In Christopher G. Langton and Katsunori Shimohara, editors, Artificial Life V, pages 426--433, Cambridge, MA, 1997. MIT Press.

....metabolic reaction networks have been observed even in simple 4 bit systems. 3.7 Binary String Automata The idea of using a formal automata to define reaction mechanisms goes presumably back to John S. McCaskill. It has been implemented and investigated by Thurk [8] Ikegami and Hashimoto [25], and Dittrich [7, 16, 26] Using mechanisms which are compatible to todays computer hardware allows very efficient implementations. The binary automata approach is especially usefull if huge spatially distributed systems should be simulated on reconfigurable computers [4] 4 Investigation ....

Takashi Ikegami and Takashi Hashimoto. Replication and Diversity in Machine-Tape Coevolutionary Systems. In C. G. Langton et al., ed., Proceedings of ALIFE V, 1996.

....is based upon the binary strings themselves, so that any particular binary string must always be placed in the same bin (if it is not full) rather than having the freedom to move around. Ikegami and Hashimoto (Machine Tape Coevolution) Takashi Ikegami and Takashi Hashimoto have described a system [25, 26] which is somewhat similar to that of Dittrich and Banzhaf [13] in that a population of binary strings are evolving which are translated into machines. A major difference is that the binary strings which are treated as machines evolve in a separate population to the binary strings which are ....

Takashi Ikegami and Takashi Hashimoto. Replication and diversity in machine-tape coevolutionary systems. In C.G. Langton and K. Shimohara, editors, Artificial Life V: Proceedings of the Fifth International Workshop on the Synthesis and Simulation of Living Systems, Cambridge, MA, 1997. MIT Press.

....down by the occurrence of parasites. Compartmentalization of a hypercycle system is a simplest way to avoid the disaster [2] 14] 15] At the same time, however, it should be noticed that it is also true that parasites can drive the increase of diversity and complexity of the replicator network [6]. In order to examine the balance between stable reproduction and diversity, we should study a relationship between an internal replication and a cellular structure which enclose it. Many models of proto cell structures have been proposed. For example, it is well known that long chained fatty ....

T. Ikegami and T. Hashimoto. Replication and diversity in machine-tape coevolutionary systems. Artificial Life V, 5:426--433, 1997.

....core network. If we study interactions among different core networks, what Fontana calls a glue sentence is corresponding to machines exchanging between core networks. These glue machines are indeed found in our cell models. Such glue machines are used to make cells of core networks differentiate[13]. Acknowledgment One of the authors (T.I. would like to thank Pauline Hogeweg for stimulating and critical discussions on this work, and her bioinformatic group for their heartful courtesy while he was staying in Utrecht. His stay was supported by NWO (Netherlands Scientic Research Foundation) ....

Ikegami T. and Hashimoto T. (1996) Replication and Diversity in Machine-Tape Coevolutionary Systems. (preprint, accepted to Alife V).

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T. Ikegami and T. Hashimoto. Replication and diversity in machine-tape coevolutionary systems. In C. Langton and K. Shimohara, editors, Artificial Life V: Proceedings of the Fifth International Conference on Artificial Life, pages 426--433. MIT Press, 1997.

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IKEGAMI,T.&HASHIMOTO, T. (1996). Replication and diversity in machine-tape coevolutionary systems. Artif. ife <, 426}433.

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