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Adaptation, Noise, and Self-Organizing Systems papers — page 8

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Stability of periodic solutions in series arrays of Josephson junctions with internal Capacitance
A mystery surrounds the stability properties of the splay-phase periodic solutions to a series array of N Josephson junction oscillators. Contrary to what one would expect from dynamical systems…
Shinya Watanabe, James W. SwiftNov 1, 1996
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Spontaneous Origin of Topological Complexity in Self-Organizing Neural Networks
Attention is drawn to the possibility that self-organizing biological neural networks could spontaneously acquire the capability to carry out sophisticated computations. In particular it is shown…
George ChaplineOct 3, 1996
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Emergent spatial correlations in stochastically evolving populations
We study the spatial pattern formation and emerging long range correlations in a model of three species coevolving in space and time according to stochastic contact rules. Analytical results for the…
Marek Grabowski, R. E. CamleyOct 3, 1996
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Symmetry Breaking and Adaptation: The Genetic Code of Retroviral Env Proteins
Although several synonymous codons can encode the same aminoacid, this symmetry is generally broken in natural genetic systems. In this article, we show that the symmetry breaking can result from…
S. Vera, H. WaelbroeckSep 30, 1996
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Spontaneous Scaling Emergence in Generic Stochastic Systems
We extend a generic class of systems which have previously been shown to spontaneously develop scaling (power law) distributions of their elementary degrees of freedom. While the previous systems…
S. Solomon, M. LevySep 11, 1996
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Ecological model of extinctions
We present numerical results based on a simplified ecological system in evolution, showing features of extinction similar to that claimed for the biosystem on Earth. In the model each species…
Guillermo AbramsonSep 11, 1996
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A Simple Learning Algorithm for the Traveling Salesman Problem
We propose a learning algorithm for solving the traveling salesman problem based on a simple strategy of trial and adaptation: i) A tour is selected by choosing cities probabilistically according to…
Kan ChenAug 15, 1996
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Systems with Multiplicative Noise: Critical Behavior from KPZ Equation and Numerics
We show that certain critical exponents of systems with multiplicative noise can be obtained from exponents of the KPZ equation. Numerical simulations in 1d confirm this prediction, and yield other…
Yuhai Tu, G. Grinstein, M. A. MuñozAug 13, 1996
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Flame front propagation II: Random Noise and Pole-Dynamics in Unstable Front Propagation
The problem of flame propagation is studied as an example of unstable fronts that wrinkle on many scales is studied. The analytic tool of pole expansion in the complex plane is emloyed to address the…
Zeev Olami, Barak Galanti, Oleg Kupervasser et al.Aug 6, 1996
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Self-organized criticality, evolution and the fossil extinction record
Statistical analysis indicates that the fossil extinction record is compatible with a distribution of extinction events whose frequency is related to their size by a power law with an exponent close…
M. E. J. NewmanJul 15, 1996
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Power Laws are Logarithmic Boltzmann Laws
Multiplicative random processes in (not necessaryly equilibrium or steady state) stochastic systems with many degrees of freedom lead to Boltzmann distributions when the dynamics is expressed in…
M. Levy, S. SolomonJul 15, 1996
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Effect of time-correlation of input patterns on the convergence of on-line learning
We studied the effects of time correlation of subsequent patterns on the convergence of on-line learning by a feedforward neural network with backpropagation algorithm. By using chaotic time series…
Tsuyoshi Hondou, Mitsuaki Yamamoto, Yasuji Sawada et al.Jun 28, 1996
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Coupled Maps with Growth and Death: An Approach to Cell Differentiation
An extension of coupled maps is given which allows for the growth of the number of elements, and is inspired by the cell differentiation problem. The growth of elements is made possible first by…
Kunihiko KanekoJun 28, 1996
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Self-Annealing Dynamics in a Multistable System
A new type of dynamical behavior of a multistable system is reported. We found that a simple non-equilibrium system can reduce its effective temperature autonomously at a global minimum if the…
Tsuyoshi HondouJun 25, 1996
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Isologous Diversification: A Theory of Cell Differentiation
Isologous diversification theory for cell differentiation is proposed, based on simulations of interacting cells with biochemical networks and cell division process following consumption of some…
Kunihiko Kaneko, Tetsuya YomoJun 20, 1996
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Two-dimensional cellular automaton model of traffic flow with open boundaries
A two-dimensional cellular automaton model of traffic flow with open boundaries are investigated by computer simulations. The outflow of cars from the system and the average velocity are…
Shin-ichi TadakiJun 13, 1996
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Physical Complexity of Symbolic Sequences
A practical measure for the complexity of sequences of symbols (``strings'') is introduced that is rooted in automata theory but avoids the problems of Kolmogorov-Chaitin complexity. This…
C. Adami, N. J. CerfMay 29, 1996
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Propagation of Information in Populations of Self-Replicating Code
We observe the propagation of information in a system of self-replicating strings of code (``Artificial Life'') as a function of fitness and mutation rate. Comparison with theoretical…
Johan Chu, Chris AdamiMay 14, 1996
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Comment on `Avalanche Dynamics in Evolution, Growth and Depinning Models'
This paper is withdrawn.
Mats Dahlbom, Anders IrbäckApr 18, 1996
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Learning from Minimum Entropy Queries in a Large Committee Machine
In supervised learning, the redundancy contained in random examples can be avoided by learning from queries. Using statistical mechanics, we study learning from minimum entropy queries in a large…
Peter SollichApr 11, 1996
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Response to Parisi's Comment on ``Non-mean-field behavior of realistic spin glasses''
We expand on why our recent results rule out the standard SK picture of realistic spin glasses.
C. M. Newman, D. L. SteinApr 2, 1996
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Phase Structure of Systems with Multiplicative Noise
The phase diagrams and transitions of nonequilibrium systems with multiplicative noise are studied theoretically. We show the existence of both strong and weak-coupling critical behavior, of two…
G. Grinstein, M. A. Muñoz, Yuhai TuFeb 5, 1996
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Self-Organized Critical Directed Percolation
We introduce and study a dynamic transport model exhibiting Self-Organized Criticality. The novel concepts of our model are the probabilistic propagation of activity and unbiased random repartition…
Sergei Maslov, Yi-Cheng ZhangJan 19, 1996
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Infinite Hierarchy of Exact Equations in the Bak-Sneppen Model
We derive an infinite hierarchy of exact equations for the Bak-Sneppen model in arbitrary dimensions. These equations relate different moments of temporal duration and spatial size of avalanches. We…
Sergei MaslovJan 18, 1996
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Self-organized criticality and the lattice topology
We examine exhaustively the behavior of avalanches in critical height sandpile models based in two- and three-dimensional lattices of various topologies. We get that for two-dimensional lattices the…
Alberto SaaJan 15, 1996
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