• top
  • profile
  • publications
  • publictalks
  • projects
  • projects
  • links
  • japanese
Takashi Ikegami's Web Page

―Complex Systems and Artificial Life―

publications
projects

Peer-Reviewed Papers

  • Takahashi, H. Horibe, N, Shimada, M, and Ikegami, T, "Analyzing House Fly's Exploration Behavior with AR methods" JPSJ, .Vo.77 No. 8 (in press)..<PDF>
  • Ogai, Y and Ikegami, T. Microslip as a Simulated Artificial Mind, Adaptive Behavior, Vol. 16, No. 2-3, 129-147 (2008).<PDF>
  • Ikegami, T and Suzuki, K, From Homeostatic to Homeodynamic Self, BioSystems, 91 (2008) 388-400.<PDF>
  • Ikegami, T., "Simulating Active Perception and Mental Imagery with Embodied Chaotic Itinerancy", J.Consciousness Studies Vol.14 (2007) ppp.111-125. <PDF>
  • Fukui S., Fukatsu T., Ikegami T., Shimada M. (2007) Endosymbiosis as a compact ecosystem with material cycling: parasitism or mutualism? J. Theor. Biol. 246(4):746-754i.
  • Sasahara, K and Ikegami, T., Evolution of Birdsong Syntax by Interjection Communication, Artificial Life 13 (2007) pp. 1-19.<PDF>
  • Ikegami, T. and Iizuka, H. "Turn-taking Interaction as a Cooperative and Co-creative Process", Infant Behavior and Development (2007)30 pp.278-288.<PDF>
  • Hanczyc, M., Toyota,T., Ikegami, T., Packard, N. and Sugawara, T. " Chemistry at the oil-water interface: Self-propelled oil droplets"J. Am. Chem. Soc.; (2007); 129(30) pp 9386 - 9391<PDF>
  • Toyota, T.; Tsuha, H.; Yamada, K.; Takakura, K.; Ikegami, T.; Sugawara, T., Listeria-like motion of oil droplets. Chemistry Letters (2006), 35, 708-709.
  • Suzuki, K., Ikegami, T., Shapes and Self-movements in Proto-Cell Systems , Journal of Artificial Life, (accepted).
  • Suzuki, K., Ikegami, T., Spatial Pattern Induced Evolution of Self-replicating Loop Network, Journal of Artificial Life, 12(4), 461-485, (2006).
  • Ito, H.C. and Ikegami,T.,Food-web formation with recursive evolutionary branching. j.Theor. Biol. 238 (2006)pp.1-10.
  • Ikegami, T. Neutral Phenotypes as Network Keystone Species,J. Population Ecology 47(2005) pp.21-29.
  • Ikegami, T. Dynamical Categories and Language, Behavioral Brain Science, Vol.28 Issue 4. (2005) pp.500.
  • Masumoto, G., Ikegami, T. A New formalization of a meta-game using the lambda calculus. BioSystems. 80. pp219-231. 2005.
  • Saito, A., Taiji, M. , Ikegami, T. , Inaccessibility in Online Learning of Recurrent Neural Networks, Phys. Rev. Lett. 93 (2004) pp.168101.
  • Sato,Y. and Ikegami, T. Undecidability in the Imitation Game,Minds and Machines 14 (2004) pp.133-143.
  • Iizuka, H. and T.Ikegami Simulated autonomous coupling in discrimination of light frequencies,Connection Science, 17 (2004) pp.283-299.
  • Iizuka, H. and T.Ikegami,Adaptability and Diversity in Simulated Turn-taking BehaviorArtificial Life 10 (2004) pp.361-378.
  • Ikegami, T., Morimoto, G. Chaotic Itinerancy in Coupled Dynamical Recognizers, CHAOS 13 (2003) 1133-1147.<PDF>
  • Nameda, E. Ohira, T. and Ikegami, T. Dynamical systems's approach to the Busy Beaer Problem Computer Phys. Comm. 147 (2002) 637--640.<PDF>
  • Ikegami, T. and Tani, J. Chaotic itinerancy needs embodied cognition to explain memory dynamics. BBS 2001 24 (5): 818-819.
  • Hashimoto, K. and Ikegami, K. Emergence of a New Attracting Set by a Mixed Strategy in Game Dynamics,j.Phys. Soc. Japan. (2001) pp. 3221-3224.<PDF>
  • Ikegami, T. and Hashimoto, K. Dynamical Systems Approach to Higher-level Heritability J. Biol. Phys. 28 (2002) pp.799-804. <PDF>
  • Bedau, Mark A., John S. McCaskill, Norman H. Packard, Steen Rasmussen, Chris Adami, David G. Green, Takashi Ikegami, Kunihiko Kaneko, and Thomas S. Ray. (2001) Open Problems in Artificial Life. Artificial Life 6(4): 363-376.
  • Hashimoto, K. and Ikegami, T. Heteroclinic Chaos, Chaotic Itinerancy and Neutral Attractors in Symmetrical Replicator Equations with Mutations j. Phys. Soc. Japan. 70 (2001) pp.349-352.<PDF>
  • Sato, Y and Ikegami, T.``Nonlinear computation with switching map systems,'' J. UCS, vol. 6, 9, p881 (2000).
  • Harada, K. and Ikegami, T. Evolution of Specificity in an Immune Network j. theor.biol. 203 (2000) 439--449.<PDF>
  • Ono, N. and Ikegami, T. Self-maintenance and Self-reproduction in an Abstract Cell Model J.Theor. Biol. 206 (2000) 243--253.
  • Ikegami, T. Evolvability of Machines and Tapes, J. Artificial Life and Robotics vol. 3 No. 4 (1999) pp.242--245.<PDF>
  • Taiji, M. and Ikegami, T. Dynamics of internal models in game players Physica D, 134, 253--266. 1999.
  • Sato, T. Taiji, M. and Ikegami, T., NP-completeness of kSAT and multifractals Computer Physics Comm. 121-122(1999) 51-53.
  • Matsushima, M. and Ikegami, T., Evolution of Strategies in the Iterated Prisoner's Dilemma Game journal of theoretical biology 195 (1998) 53--67.
  • Nishimura, S.I. and Ikegami, T. Emergence of Collective strategies in a prey-predator game model Artificial Life Journal Vol. 3(4) 243--260, 1998.
  • Hashimoto, T. and Ikegami, T., Emergence of Net-grammar in Communicationg Agents BioSystems 38 pp.1--14. 1996.
  • Ikegami, T. and Hashimoto, T., Active Mutation in Self-Reproducing Networks of Machines and Tapes, Artificial Life 2 pp. 305--318. (1995).
  • Ikegami, T. From Genetic Evolution to Emergence of Game Strategies Physica D 75, pp.310--327. 1994.
  • Ikegami, T. and Kaneko, K. Evolution of Host-parasitoid network through Homeochaotic Dynamics, CHAOS 2 pp.397--408. 1992.
  • Kaneko, K. and Ikegami, T. Homeochaos: Dynamical stability of Symbiotic Network with Population Dynamics and Evolving Mutation Rates, Physica D 56 pp.406--429. 1992.
  • Ikegami, T. and Tsuda, I. Measuring Complexity : A relative aspect of pattern recognition Int'l. J. Mod. Phys. C 3 pp.447-458. 1992.
  • Ikegami, T. and Kaneko, K. Genetic Fusion Phys. Rev. Lett. 65 pp.3352-3355. 1990
  • Ikegami, T. and Kaneko, K. Computer Symbiosis--- Emergence of Symbiotic Behavior Through Evolution, Physica D 42 pp.235--243. 1990.
  • Ikegami, T. Dynamical Behaviors of the Immune Network, Prog.Theor.Phys. 81 pp.309--320. 1989.
  • Ikegami, T. and Suzuki, M. Spatio-Temporal Patterns of a Plastic Network System, Prog.Theor.Phys. 78 pp.38--50. 1987.

Peer-Reviewed Proceedings

  • Hiroki Matsuno, Martin M. Hanczyc, Takashi Ikegami: Self-maintained Movements of Droplets with Convection Flow. ACAL 2007: 179-188.<PDF>
  • Uno, Ryoko, Davide Marocco, Stefano Nolfi and Takashi Ikegami 2007 "Transition from Imperatives to Declaratives in Artificial Communicating Systems", Workshop "Social Learning in Embodied Agents" in 9th European Conference on Artifitial Life, Lisbon, Portugal. September 10-14, 2007.<PDF>
  • Uno, Ryoko and Takashi Ikegami 2007 "Two Types of Speaker Involvement Scales and Causal Connectives in Japanese", 10th International Cognitive Linguistic Conference at Jagiellonian University of Krakow, Poland. July 15-21, 2007. (Handbook 277-278)
  • Kohei Nakajima, Soya Shinkai, Takashi Ikegami: Formal Model of Embodiment on Abstract Systems: From Hierarchy to Heterarchy. ECAL 2007: 1110-1119
  • Aucoutier,J.., Ogai, Y and Ikegami, T., Making a robot dance to music using chaotic itinerancy in a network of FitzHugh-Nagumo neurons, Proc. of the 14th Int’l Conf. on Neural Informaiton Processing.<PDF>
  • Asaki Saito, Makoto Taiji, Takashi Ikegami: Dynamical Singularities in Online Learning of Recurrent Neural Networks. FOCI 2007: 174-179
  • Morimoto, G., Ikegami, T., Emergence of Coherent Coordinated Behavior in a Network of Homogeneous Active Elements, From Animals to Animats 9: Proceedings of the Ninth International Conference on Simulation of Adaptive Behavior, 510-521, 2006
  • Morimoto, G., Ikegami, T. Development of Haptic Perception by Homogenenous Active Elements, Proceedings of the Sixth International Workshop on Epigenetic Robotics: Modeling Cognitive Development in Robotic Systems, 178-179, 2006
  • Ikegami, T., Chaotic Itinerancy, Active Perception and Mental Imagery, in the proceedings of the Symposium on Next Generation Approaches to Machine Consciousness (Hatfield, UK, 2005)pp.36-39. ISBN1-902956468.
  • Sasahara, K. and Ikegami, T.Evolution of Song Comunication in a 2D Space, in ECAL2005 LNAI 3630 (eds. M. Capcarrere et al. ) pp.835-844.Springer-Verlag Berlin Heidelberg 2005.
  • Iizuka, H., Ikegami,T., Emergence of Body Image and the Dichotomy of Sensory and Motor Activity, in the proceedings of the Symposium on Next Generation Approaches to Machine Consciousness (Hatfield, UK, 2005) pp.104-109. ISBN1-902956468.
  • Sasahara, K. and Ikegami, T.Evolution of Song Comunication in a 2D Space, in ECAL2005 LNAI 3630 (eds. M. Capcarrere et al. ) pp.835-844.Springer-Verlag Berlin Heidelberg 2005.
  • Ogai, Y., Ikegami, T., Microslip as a dynamical system, Proceedings of the 4th International Conference on Human and Artificial Intelligence Systems, eds. K.Murase, L.C.Jain, K.Sekiyama and T.Asakura, (Advanced Knowledge International Pty. Ltd., 2004) pp.215-220.
  • Nasukawa, M., Morimoto,G., Ikegami, T., Evolution of Sensory-motor Coordination Physical Coherency, Proceedings of the 4th International Conference on Human and Artificial Intelligence Systems, eds. K.Murase, L.C.Jain, K.Sekiyama and T.Asakura, (Advanced Knowledge International Pty. Ltd., 2004) pp. 401-406.
  • Morimoto, G., Ikegami, T., Exploration Behavior in Shape Discrimination, AI Robotics and Control: Proceedings of the 4th International Conference on Human and Artificial Intelligence Systems, eds. K.Murase, L.C.Jain, K.Sekiyama and T.Asakura, (Advanced Knowledge International Pty. Ltd., 2004) pp.209-214.
  • Morimoto, G. and Ikegami, T.,``Evolution of Plastic Sensory-motor Coupling and Dynamic Categorization''in {\sl Artificial Life IX}in {\sl Artificial Life IX}(eds. J.Pollack et al., MIT press, 2004) pp.188-193.
  • Sasahara, K. \& Takashi Ikegami, ``Song Grammars as Complex Sexual Displays''in {\sl Artificial Life IX}in {\sl Artificial Life IX} (eds. J.Pollack et al., MIT press, 2004) pp.194-199.
  • Madina, D. \& Takashi Ikegami,``Cellular Formation in a 3D Molecular Dynamics System with Chemistry''in {\sl Artificial Life IX}in {\sl Artificial Life IX} (eds. J.Pollack et al., MIT press, 2004) pp. 461-465.
  • Salzberg, C., Sayama, H. \& Takashi Ikegami, A Tangled Hierarchy of Graph- Constructing Graphs in {\sl Artificial Life IX}in {\sl Artificial Life IX} (eds. J.Pollack et al., MIT press, 2004) pp.495-500.
  • Suzuki, K. and Ikegami, T.,``Self-repairing and Mobility of a Simple Cell'' in {\sl Artificial Life IX}in {\sl Artificial Life IX}(eds. J.Pollack et al., MIT press, 2004) pp.421-426.
  • Ogai, Y., Ikegami, T., Microslip as a dynamical system, Proceedings of the 4th International Conference on Human and Artificial Intelligence Systems, eds. K.Murase, L.C.Jain, K.Sekiyama and T.Asakura, (Advanced Knowledge International Pty. Ltd., 2004) pp.215-220.
  • Nasukawa, M., Morimoto,G., Ikegami, T., Evolution of Sensory-motor Coordination Physical Coherency, Proceedings of the 4th International Conference on Human and Artificial Intelligence Systems, eds. K.Murase, L.C.Jain, K.Sekiyama and T.Asakura, (Advanced Knowledge International Pty. Ltd., 2004) pp. 401-406.
  • Morimoto, G., Ikegami, T., Exploration Behavior in Shape Discrimination, AI Robotics and Control: Proceedings of the 4th International Conference on Human and Artificial Intelligence Systems, eds. K.Murase, L.C.Jain, K.Sekiyama and T.Asakura, (Advanced Knowledge International Pty. Ltd., 2004) pp.209-214.
  • Iizuka, H. and Ikegami, T Adaptive Coupling and Intersubjectivity in Simulated Turn-Taking Behaviours, Advances in Artificial Life (Springer, 2003). Banzhaf et al., pp. 336-345.<PDF>
  • Suzuki, K. and Ikegami, T. Interaction based Evolution of Self-replicating Loop Structures, Advances in Artificial Life (Springer, 2003). Banzhaf et al., 89-96.<PDF>
  • Sasahara, K. and Ikegami, T., Coevolution of Birdsong Grammar without Imitation Advances in Artificial Life (Springer, 2003). Banzhaf et al., 482-490.<PDF>
  • Madina, D., Ono, N. and Ikegami, T.,Cellular Evolution in a 3D Lattice Artificial Chemistry Advances in Artificial Life (Springer, 2003). Banzhaf et al., 59-68.<PDF>
  • Ikegami, T. and Iizuka, H., Joint attention and Dynamics repertoire in Coupled Dynamical Recognizers,the proceedings of the AISB 03: the Second International Symposium on Imitation in Animals and Artifacts (UK, 2003, Apr.) pp.125-130.<PDF>
  • Ikegami, T. Iwata, T and Hashimoto, K. A Network fo Dynamic Keystone Species Artificial Life VIII (eds. R.K. Standish, M.A. Bedau and H.A. Abbass, MIT, 2003) pp. 216-222.<PDF>
  • Ito, H. and Ikegami,T. Evolutionary Dynamics of a Food Web with Recursive Branching and Extinction in {\em Artificial Life VIII}(eds. R.K. Standish, M.A. Bedau and H.A. Abbass, MIT, 2003) pp. 207-215.
  • Iizuka, H. and Ikegami, T. Simulating Turn-taking Behaviors with Coupled Dynamical Recognizers in {\em Artificial Life VIII} (eds. R.K. Standish, M.A. Bedau and H.A. Abbass, MIT, 2003) pp. 319-328.
  • Masumoto, G. and Ikegami, T., The Lambda Game System -- An approach to a meta game-- Advances in Artificial Life LNAI 2159 (eds. J.Kelemen and P.Sosik, Springer, 2001) pp.695-699.<PDF>
  • Ono, N. and Ikegami, T. Artificial Chemistry: Computational Studies on the Emergence of Self-Reproducing Units. i Advances in Artificial Life LNAI 2159 (eds. J.Kelemen and P.Sosik, Springer, 2001) pp.186-195.
  • Ikegami, T. and Taiji, M. Imitation and Cooperation in Coupled Dynamical Recognizers 545--554. Advances in Artificial Life ( eds. Floreano,D. et al., Springer-Verlag, 1999).<PDF>
  • Sato, Y. and Ikegami, T., Undecidability of the Imitation Game (eds. Dautenhahn et al.) 157--159. Imitation in Animals and Artifacts in the Proceedings of the AISB '99 Symposium (publ. The society for the study of Artificial Intelligence and Simulation Behavior) 1999.
  • Harada, K. and Ikegami, T. Evolution of Multispecificity in an Immune Network (eds. Floreano,D. et al.) 427--431. Advances in Artificial Life (Springer-Verlag) 1999.
  • Ono, N. and Ikegami, T. Model of Self-replicating cell capable of self-maintenance. Advances in Artificial Life LNAI 1674 (eds. D.Floreano et al., Springer 1999)pp.398--406.<PDF>
  • Ikegami, T. and Taiji, M. Structures of Possible Worlds in a Game of Players with Internal Models Acta Polytechnica Scandinavica No. 91(1998) pp.283-292.<PDF>
  • Nishimura, S.I. and Ikegami, T. Emergence and Maintenance of Relationships among Agents in Artificial Life VI (eds. C. Adami, R. Belew, H. Kitano and C. Taylor, MIT Press, 1998) pp. 438--442.<PDF>
  • Ikegami, T. and Hashimoto, T., Replication and Diversity in Machine-Tape Coevolutionary Systems Artificial Life V (eds. C.Langton and K.Shimohara, MIT press) pp.426--433. 1997 <PDF>
  • Ikegami, T. and Hashimoto, T., Coevolution of Machines and Tapes Advances in Artificial Life ( eds. F.Moran et al., LNAI 929). pp.234--254. 1995
  • Ikegami,T. Ecology of Evolutionary Game Strategies, in the proceedings of international symposium on European Conference for Artificial Life(May, Brussels). 1993.

Books in English(Book Chapter)

  • Ikegami, T., Ogai, Y., Evala, H., Shibuya, M and Shibuya,K Filmachine/filmachine phonics<PDF>
  • Ono, N. , Madina, D. and Ikegamni, T. Origin of Life and Lattice Artificial Chemistry, Protocells: Bridging Nonliving and Living Matter, edby S.Rasumussen, L.Chen, N.Packard, M.Bedau, D.Deamer, P.Stadler and D.Krakauer, MIT Press (2007) in press.
  • Ikegami, T and Zlatev, J. From pre-representational cognition to language, In Body, Language and Mind, vol. 2. Zlatev, Jordan; Ziemke, Tom; Frank, Roz; Dirven, Ren (eds.). Berlin: Mouton de Gruyter,2007. pp.241-283.<PDF>
  • Ikegami, T and Iizuka, H. Turn-taking and Styles of Motion, In the `Imitation and Social Learning in Robots, Humans and Animals: Behavioural, Social and Communicative Dimensions'', to be published by Cambridge University Press, edited by Chrystopher Nehaniv and Kerstin Dautenhan (2007)pp.301-321.
  • Pollack,J., Mark Bedau, Phil Husbands, Takashi Ikegami, and Richard A. Watson. ``Artificial Life IX'', Cambridge: MITpress 2004.
  • Tsuda, I. and Ikegami, T. A book review on {\em Endophysics: The World As An Interface} Discrete Dynamics in Nature and Society, Vol. 7 (2002) pp.213-214.
  • Sato, Y. Taiji, M. and Ikegami, T. ``On the power of nonlinear mappings in switching map systems,'' `Unconventional Models of Computation UMC2K,'' p234-247, Springer-Verlag (2000).
  • Sato,Y., M. Taiji,M., and Ikegami, T., Self-similar sets as satisfiable Boolean expressions, Unconventional Models of Computation,'' p352-370, Springer-Verlag (1998).
  • Ikegami, T. and Yoshikawa, E.S, Chaos and Evolution of Cooperative Behavior in a Host-parasite Game in Towards the Harnessing of Chaos (ed. M.Yamaguchi, Springer)pp.63--72. 1995.

site by Kanade Yagi