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Adaptation, Noise, and Self-Organizing Systems papers — page 12

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Dynamics of a stochastically driven running sandpile
We analyze in detail a one-dimensional stochastically driven running sandpile. The dynamics shows three different phases, depending on the on-site relaxation rate and stochastic driving rate. Two…
T. Becker, H. de Vries, B. EckhardtJul 11, 1994
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Constructive Complexity and Artificial Reality: An Introduction
Basic problems of complex systems are outlined with an emphasis on irreducibility and dynamic many-to-many correspondences. We discuss the importance of a constructive approach to artificial reality…
Kunihiko Kaneko, Ichiro TsudaJul 7, 1994
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Study of a New Neuron
We study a modular neuron alternative to the McCulloch-Pitts neuron that arises naturally in analog devices in which the neuron inputs are represented as coherent oscillatory wave signals. Although…
S. L. Adler, G. V. Bhanot, J. D. WeckelJun 20, 1994
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Nonlinear Dynamics in Distributed Systems
We build on a previous statistical model for distributed systems and formulate it in a way that the deterministic and stochastic processes within the system are clearly separable. We show how…
Iqbal Adjali, José-Luis Fernández-Villacañas, Michael GellMay 17, 1994
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Evolutionary Learning in the 2D Artificial Life System "Avida"
We present a new tierra-inspired artificial life system with local interactions and two-dimensional geometry, based on an update mechanism akin to that of 2D cellular automata. We find that the…
Chris Adami, C. Titus BrownMay 16, 1994
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On Modelling Life
We present a theoretical as well as experimental investigation of a population of self-replicating segments of code subject to random mutation and survival of the fittest. Under the assumption that…
Chris AdamiMay 16, 1994
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Beliefs and Cooperation
Individuals in groups must often choose between acting selfishly and cooperating for the common good. The choices they make are based on their beliefs on how they expect their actions to affect…
Bernardo A. Huberman, Natalie S. GlanceMay 10, 1994
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Cellular Games
A cellular game is a dynamical system in which cells, placed in some discrete structure, are regarded as playing a game with their immediate neighbors. Individual strategies may be either…
Lenore LevineApr 7, 1994
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Like Sparrows on a Clothes Line: The Self-Organization of Random Number Sequences
We study sequences of random numbers Z[1],Z[2],Z[3],...,Z[n] -- which can be considered random walks with reflecting barriers -- and define their "types" according to whether Z[i] > Z[i+1],…
George G. SzpiroFeb 14, 1994
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Training and Turnover in Organizations
We present a two-level model of organizational training and agent production. Managers decide whether or not to train based on both the costs of training compared to the benefits and on their…
Natalie S. Glance, Tad Hogg, Bernardo A. HubermanFeb 8, 1994
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Learning and Complexity in Genetic Auto-Adaptive Systems
We describe and investigate the learning capablities displayed by a population of self-replicating segments of computer-code subject to random mutation: the tierra environment. We find that learning…
Chris AdamiJan 27, 1994
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Self-organized Criticality in Living Systems
We suggest that ensembles of self-replicating entities such as biological systems naturally evolve into a self-organized critical state in which fluctuations, as well as waiting-times between phase…
C. AdamiJan 27, 1994
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Soft Turbulence in the Atmospheric Boundary Layer
In this work we compare the spectral properties of the daily medium temperature fluctuations with the experimental results of the Chicago Group, in which the local temperature fluctuations were…
Imre M. Jánosi, Gábor VattayDec 8, 1993
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Parametric ordering of complex systems
Cellular automata (CA) dynamics are ordered in terms of two global parameters, computable a priori from the description of rules. While one of them (activity) has been used before, the second…
P. -M. BinderDec 1, 1993
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Scaling behaviour in daily air humidity fluctuations
We show that the daily average air humidity fluctuations exhibit non-trivial 1/fα behaviour which different from the spectral properties of other meteorological quantities. This feature and the…
Gabor Vattay, Andrea HarnosNov 29, 1993
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Chaos as a Source of Complexity and Diversity in Evolution
The relevance of chaos to evolution is discussed in the context of the origin and maintenance of diversity and complexity. Evolution to the edge of chaos is demonstrated in an imitation game. As an…
Kunihiko KanekoNov 25, 1993
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Imitation Games
Mutual imitation games among artificial birds are studied. By employing a variety of mappings and game rules, the evolution to the edge between chaos and windows is universally confirmed. Some other…
Kunihiko Kaneko, Junji SuzukiNov 25, 1993
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Cell Division, Differentiation and Dynamic Clustering
A novel mechanism for cell differentiation is proposed, based on the dynamic clustering in a globally coupled chaotic system. A simple model with metabolic reaction, active transport of chemicals…
Kunihiko Kaneko, Tetsuya YomoNov 25, 1993
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On the Threshold of Chaos in Random Boolean Cellular Automata
A random boolean cellular automaton is a network of boolean gates where the inputs, the boolean function, and the initial state of each gate are chosen randomly. In this article, each gate has two…
James F. LynchSep 16, 1993
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Dynamics of Earthquake Faults
We present an overview of our ongoing studies of the rich dynamical behavior of the uniform, deterministic Burridge--Knopoff model of an earthquake fault. We discuss the behavior of the model in the…
J. M. Carlson, J. S. Langer, B. E. ShawAug 5, 1993
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Prediction and Adaptation in an Evolving Chaotic Environment
We describe the results of analytic calculations and computer simulations of adaptive predictors (predictive agents) responding to an evolving chaotic environment and to one another. Our simulations…
Alfred Hübler, David PinesJun 28, 1993
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Exact solutions for a mean-field Abelian sandpile
We introduce a model for a sandpile, with N sites, critical height N and each site connected to every other site. It is thus a mean-field model in the spin-glass sense. We find an exact solution for…
Steven A. Janowsky, Claude A. LabergeJun 14, 1993
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Dynamics, Computation, and the "Edge of Chaos": A Re-Examination
In this paper we review previous work and present new work concerning the relationship between dynamical systems theory and computation. In particular, we review work by Langton Langton90 and…
M. Mitchell, J. P. Crutchfield, P. T. HraberJun 11, 1993
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Swarms, Phase Transitions, and Collective Intelligence
A spacially extended model of the collective behavior of a large number of locally acting organisms is proposed in which organisms move probabilistically between local cells in space, but with…
Mark M. MillonasJun 11, 1993
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A nonequilibrium statistical field theory of swarms and other spatially extended complex systems
A class of models with applications to swarm behavior as well as many other types of spatially extended complex biological and physical systems is studied. Internal fluctuations can play an active…
Mark M. MillonasJun 10, 1993
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