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Adaptation, Noise, and Self-Organizing Systems papers — page 4

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Distributed Self-regulation Induced by Negative Feedbacks in Ecological and Economic Systems
We consider an ecological system governed by Lotka-Volterra dynamics and an example of an economic system as a mesomarket with perfect competition. We propose a mechanism for cooperative…
V. V. Gafiychuk, I. A. Lubashevsky, Robert E. UlanowiczNov 4, 1998
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Coherence and synchronization in diode-laser arrays with delayed global coupling
The dynamics of a semiconductor-laser array whose individual elements are coupled in a global way through an external mirror is numerically analysed. A coherent in-phase solution is seen to be…
J. Garcia-Ojalvo, J. Casademont, C. R. Mirasso et al.Oct 29, 1998
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One Dimensional nary Density Classification Using Two Cellular Automaton Rules
Suppose each site on a one-dimensional chain with periodic boundary condition may take on any one of the states 0,1,..., n-1, can you find out the most frequently occurring state using cellular…
H. F. Chau, L. W. Siu, K. K. YanOct 22, 1998
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Emergence and Growth of Complex Networks in Adaptive Systems
We consider the population dynamics of a set of species whose network of catalytic interactions is described by a directed graph. The relationship between the attractors of this dynamics and the…
Sanjay Jain, Sandeep KrishnaOct 15, 1998
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Optimizing Epochal Evolutionary Search: Population-Size Dependent Theory
Epochal dynamics, in which long periods of stasis in an evolving population are punctuated by a sudden burst of change, is a common behavior in both natural and artificial evolutionary processes. We…
Erik van Nimwegen, James P. CrutchfieldOct 13, 1998
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Optimizing Epochal Evolutionary Search: Population-Size Independent Theory
Epochal dynamics, in which long periods of stasis in population fitness are punctuated by sudden innovations, is a common behavior in both natural and artificial evolutionary processes. We use a…
Erik van Nimwegen, James P. CrutchfieldOct 12, 1998
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Nonlinear theory of autooscillations of quasiplanar interface during directional solidification
Within the framework of the frozen temperature approximation we develop a strongly-nonlinear theory of one-dimensional pattern formation during directional solidification of binary mixture under…
I. A. Lubshevsky, V. V. Gafiychuk, M. G. KeijanOct 6, 1998
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Stable Adaptive Control Using New Critic Designs
Classical adaptive control proves total-system stability for control of linear plants, but only for plants meeting very restrictive assumptions. Approximate Dynamic Programming (ADP) has the…
Paul J. WerbosSep 25, 1998
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Decline in extinction rates and scale invariance in the fossil record
We show that the decline in the extinction rate during the Phanerozoic can be accurately parameterized by a logarithmic fit to the cumulative total extinction. This implies that extinction intensity…
M. E. J. Newman, Gunther J. EbleSep 22, 1998
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Autocatalytic Sets and the Growth of Complexity in an Evolutionary Model
A model of s interacting species is considered with two types of dynamical variables. The fast variables are the populations of the species and slow variables the links of a directed graph that…
Sanjay Jain, Sandeep KrishnaSep 17, 1998
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Dynamics of clade diversification on the morphological hypercube
Understanding the relationship between taxonomic and morphological changes is important in identifying the reasons for accelerated morphological diversification early in the history of animal phyla.…
Sergey GavriletsSep 15, 1998
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The Evolutionary Design of Collective Computation in Cellular Automata
We investigate the ability of a genetic algorithm to design cellular automata that perform computations. The computational strategies of the resulting cellular automata can be understood using a…
James P. Crutchfield, Melanie Mitchell, Rajarshi DasSep 8, 1998
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Wavelet Based Fractal Analysis of Airborne Pollen
The most abundant biological particles in the atmosphere are pollen grains and spores. Self protection of pollen allergy is possible through the information of future pollen contents in the air. In…
M. E. Degaudenzi, C. M. ArizmendiAug 27, 1998
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Memory Effects and Macroscopic Manifestation of Randomness
It is shown that due to memory effects the complex behaviour of components in a stochastic system can be transmitted to macroscopic evolution of the system as a whole. Within the Markov approximation…
A. A. StanislavskyAug 19, 1998
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Cooperative mechanism of self-regulation in hierarchical living systems
We study the problem of how a ``living'' system complex in structure can respond perfectly to local changes in the environment. Such a system is assumed to consist of a distributed…
I. A. Lubashevsky, V. V. GafiychukAug 19, 1998
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Life as Complex Systems --- Viewpoint from Intra-Inter Dynamics
Basic problems in complex systems are surveyed in connection with Life. As a key issue for complex systems, complementarity between syntax/rule/parts and semantics/behavior/whole is stressed. To…
Kunihiko KanekoAug 11, 1998
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Rapid parapatric speciation on holey adaptive landscapes
A classical view of speciation is that reproductive isolation arises as a by-product of genetic divergence. Here, individual-based simulations are used to evaluate whether the mechanisms implied by…
Sergey Gavrilets, Hai Li, Michael D. VoseJul 27, 1998
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A dynamical theory of speciation on holey adaptive landscapes
The metaphor of holey adaptive landscapes provides a pictorial representation of the process of speciation as a consequence of genetic divergence. In this metaphor, biological populations diverge…
Sergey GavriletsJul 27, 1998
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Dynamics of Internal Models in Game Players
A new approach for the study of social games and communications is proposed. Games are simulated between cognitive players who build the opponent's internal model and decide their next strategy…
Makoto Taiji, Takashi IkegamiJul 23, 1998
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Development and Evolution of Neural Networks in an Artificial Chemistry
We present a model of decentralized growth for Artificial Neural Networks (ANNs) inspired by the development and the physiology of real nervous systems. In this model, each individual artificial…
Jens C. Astor, Christoph AdamiJul 17, 1998
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Coupled Oscillators with Chemotaxis
A simple coupled oscillator system with chemotaxis is introduced to study morphogenesis of cellular slime molds. The model successfuly explains the migration of pseudoplasmodium which has been…
Satoshi Sawai, Yoji AizawaJun 28, 1998
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Simple model of 1/f noise
Simple analytically solvable model of 1/f noise is proposed. The model consists of one or few particles moving in the closed contour. The drift period of the particle round the contour fluctuates…
B. KaulakysJun 16, 1998
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How fast do structures emerge in hypercycle-systems?
A general framework for the simulation of reaction-diffusion systems with probabilistic cellular automata is presented. The basic reaction probabilities of the chemical model translate directly into…
S. Altmeyer, C. Wilke, T. MartinetzJun 5, 1998
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On the 1/f fluctuations in the nonlinear systems affected by noise
We investigate a problem of the necessary and sufficient conditions for appearance of the 1/f fluctuations in the simple systems affected by the external random perturbations, i.e. the power spectral…
B. Kaulakys, T. MeskauskasJun 5, 1998
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Neural network design for J function approximation in dynamic programming
This paper shows that a new type of artificial neural network (ANN) -- the Simultaneous Recurrent Network (SRN) -- can, if properly trained, solve a difficult function approximation problem which…
X. Pang, P. WerbosJun 3, 1998
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