4,342 research outputs found
Experimental observation of chimera and cluster states in a minimal globally coupled network
A "chimera state" is a dynamical pattern that occurs in a network of coupled
identical oscillators when the symmetry of the oscillator population is broken
into synchronous and asynchronous parts. We report the experimental observation
of chimera and cluster states in a network of four globally coupled chaotic
opto-electronic oscillators. This is the minimal network that can support
chimera states, and our study provides new insight into the fundamental
mechanisms underlying their formation. We use a unified approach to determine
the stability of all the observed partially synchronous patterns, highlighting
the close relationship between chimera and cluster states as belonging to the
broader phenomenon of partial synchronization. Our approach is general in terms
of network size and connectivity. We also find that chimera states often appear
in regions of multistability between global, cluster, and desynchronized
states
Delayed Dynamical Systems: Networks, Chimeras and Reservoir Computing
We present a systematic approach to reveal the correspondence between time
delay dynamics and networks of coupled oscillators. After early demonstrations
of the usefulness of spatio-temporal representations of time-delay system
dynamics, extensive research on optoelectronic feedback loops has revealed
their immense potential for realizing complex system dynamics such as chimeras
in rings of coupled oscillators and applications to reservoir computing.
Delayed dynamical systems have been enriched in recent years through the
application of digital signal processing techniques. Very recently, we have
showed that one can significantly extend the capabilities and implement
networks with arbitrary topologies through the use of field programmable gate
arrays (FPGAs). This architecture allows the design of appropriate filters and
multiple time delays which greatly extend the possibilities for exploring
synchronization patterns in arbitrary topological networks. This has enabled us
to explore complex dynamics on networks with nodes that can be perfectly
identical, introduce parameter heterogeneities and multiple time delays, as
well as change network topologies to control the formation and evolution of
patterns of synchrony
An investigation of the relationship between training on task analysis technology, professional role and reallocation behavior in a simulation game of family planning job design /
From Facts to Form: Extension and Application of the Feist Practical Inevitability Test and Creativity Standard
This Note will analyze the results of extending the practical inevitability test and creativity standard in the holding of Feist Publications, Inc. v. Rural Telephone Service Co. from works involving the compilation of facts to other works including computer programs, sculpture, signs, fabric patterns and chinaware patterns. It will also discuss the Copyright Office\u27s review of copyright applications for functional objects. The Note will continue with an analysis of the ramifications of the policy of judicial deference to the Register of Copyright\u27s decision on creativity when reviewing a copyright denial. It will conclude with a discussion of the judicial policy that an action for infringement is the most appropriate place to determine the creativity element necessary for obtaining a copyright for functional objects
A descriptive analysis of the techniques and procedures used in establishing and conducting a distributive education cooperative training program,
Thesis (M.A.)--Boston University, 1949. This item was digitized by the Internet Archive
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