Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"Cellular automaton"”.
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Simulation of an interacting system using a cellular automaton
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1987.
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A cellular automaton – based system for the identification of topological features of carotid artery plaques
… of constraint-logic programming resulting in a cellular-automaton based model which is shown to produce distinct images for different sizes and topologies of plaque in a reliable and human-interpretable way.
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Simulating the Spread of Malaria: A Cellular Automaton Based Mathematical Model & A Prototype Software Implementation
… a simulation model based on the framework of cellular automata, which addresses many shortcomings of previous models. Cellular automata are dynamical systems, which are discrete in time and space. The implementation of the model proposed can easily be integrated with EpiSims/TRANSIMS. EpiSims …
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Cellular automata models for excitable media
A cellular automaton is developed for simulating excitable media. First, general "masks" as discrete approximations to the diffusion equation are examined, showing how to calculate the diffusion coefficient from the elements of the mask. The mask is then combined with a thresholding operation to …
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Learning two-dimensional spatial dynamics from experimental data
… of possible models is a class of probabilistic cellular automaton rules, a rule which is inherently local. The traditional definition of a cellular automaton has been enhanced here to include information which is non-local in both space and time thus allowing the models to reproduce a greater …
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Learning two-dimensional spatial dynamics from experimental data
… of possible models is a class of probabilistic cellular automaton rules, a rule which is inherently local. The traditional definition of a cellular automaton has been enhanced here to include information which is non-local in both space and time thus allowing the models to reproduce a greater …
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Generic Influences of Charged Defects on the Structure-Property Relationships of Modified Ferroelectric Barium Titanate and Antiferroelectric Sodium Niobate
A preliminary two-dimensional cellular automaton model of defect distribution was proposed based on space charge neutrality considerations. It used only pairwise nearest-neighbor interactions and neglected the elastic effects associated with lattice distortions. Simulations demonstrated a general …
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Combat modelling with partial differential equations
… reproduce for the first time apparently complex cellular automaton behaviour with simple partial differential equations, providing an alternate mechanism through which to analyse this behaviour. Our PDE model easily explains behaviour observed in selected scenarios of the cellular automaton …
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Inverted theory networks
… It is shown that these structures call emulate cellular automaton systems and in particular, simulate universal Turing machines. The regulating priuciple of natural selection is formalised together with its necessary and sufficient conditions. It is proven that there exists inverted theory …
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Fluid Dynamics Simulations on Multi-GPU Systems
… fluid flow simulation models, focusing on the cellular automaton MAGFLOW lava flow simulator and the GPU-SPH model for Navier-Stokes. In both cases, a spatial subdivision of the domain is performed, with a minimal overlap to ensure the correct evaluation of the bordering elements (cells in …
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Multi-scale numerical modelling of phase transition phenomena in metallic alloys
… Dynamics (MD) methods at the atomic level, the Cellular Automaton (CA) method at the microscale and the Finite Volume (FV) models at the macroscale. The combination of these methods allowed us to study the phase transition beginning from the atomic clusterisation, progressing to the …
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Searching for patterns in Conway's Game of Life
Conway’s Game of Life (Life) is a simple cellular automaton, discovered by John Conway in 1970, that exhibits complex emergent behavior. Life-enthusiasts have been looking for building blocks with specific properties (patterns) to answer unsolved problems in Life for the past five decades. Finding …
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Cellular Automata: Algorithms and Applications
Cellular automata (CA) are an interesting computation medium to study because of their simplicity and inherently parallel operation. These characteristics make them a useful and efficient computation tool for applications such as cryptography and physical systems modelling, particularly when …
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DNA Chemical Reaction Network Design Synthesis and Compilation
… and KCA, a simulation of DNA kinetics using a cellular automaton discretization. Our methods are applicable to other DNA nanotechnology constructions and may serve in the development of a full DNA computing model.</p>
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Local Hamiltonians in quantum computation
… Finally, I define a Hamiltonian Quantum Cellular Automaton, a continuous-time model of computation which doesn't require control during the computation process, only preparation of product initial states. I construct two of these, showing that time evolution with a simple, local, …
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An Investigation of Complex Systems in 16 Dimensions
… He argues that the processes of understanding cellular automata can be applied to other aspects of science. Dr. Rodrigo Obando of Columbus State University took Dr. Wolfram's work and dissected it. By breaking down the rules, he started seeing patterns emerge in their ordering. He created a …
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Linear Programs with Polynomial Coefficients and Applications to 1D Cellular Automata
… of ergodicity of the following elementary 1D cellular automaton: given the current state ηₜ∈{0,1}ℤ the next state ηₜ₊₁(n) at each vertex n∈ superscript ℤ is obtained by ηₜ₊₁(n)=NAND(BSCδ(ηₜ(n−1)),BSCδ(ηt(n))). Here the binary symmetric channel BSCδ takes a bit as input and flips it with …
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The Differential Scheme and Quantum Computation
… new model of quantum computation, the quantum cellular automaton, with an eye towards extending the differential scheme to accommodate quantum computation and hybrid classical/quantum computation.</p> <p> All the components of a specific instance of the differential scheme are <em>Convergence …
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Shape Evolution of Nanostructures by Thermal and Ion Beam Processing
… Since the employed KMC code is founded on a cellular automaton principle, the spatio-temporal development of lattice-based N-particle systems (N up to several million) can be followed for time spans of several orders of magnitude, while considering local phenomena due to atomic-scale effects …
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Morphogenesis and Growth Driven by Selection of Dynamical Properties
… to the problem, abstracting the organism as a cellular automaton. Such systems are discrete digital models of real-world environments, making them more accessible and easier to study then their physical world counterparts. In such simplified synthetic models, we find that the structure of the …
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