Relevant bibliographies by topics / Penta-hepta defect

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Penta-hepta defect'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Penta-hepta defect"

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AFENCHENKO, V. O., A. B. EZERSKY, A. V. NAZAROVSKY, and M. G. VELARDE. "EXPERIMENTAL EVIDENCE ON THE STRUCTURE AND EVOLUTION OF THE PENTA–HEPTA DEFECT IN HEXAGONAL LATTICES DUE TO BÉNARD–MARANGONI CONVECTION." International Journal of Bifurcation and Chaos 11, no. 05 (2001): 1261–73. http://dx.doi.org/10.1142/s0218127401002729.

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Evidence is provided to show that the penta–hepta defect in a Bénard convective hexagonal lattice arises as a result of the attraction of two dislocations having opposite topological charges and belonging to different modes. The dislocations approach each other along a corridor connecting those topological charges. Fields of long–living penta–hepta defects have been analyzed. The comparison of experimental results with recent numerical calculations and solutions obtained analytically shows good qualitative agreement.
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Tsimring, Lev S. "Penta-Hepta Defect Motion in Hexagonal Patterns." Physical Review Letters 74, no. 21 (1995): 4201–4. http://dx.doi.org/10.1103/physrevlett.74.4201.

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MILLÁN-RODRÍGUEZ, JUAN. "INFLUENCE OF DEFECTS IN THE HEXAGON-ROLL TRANSITION IN CONVECTIVE LAYERS." International Journal of Bifurcation and Chaos 04, no. 05 (1994): 1357–61. http://dx.doi.org/10.1142/s0218127494001076.

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We investigate numerically the structure of the boundaries between domains of hexagons arising in a convective system when the vertical symmetry is broken. The wall is basically formed by penta-hepta (P-H) pair defects. The transition from a pattern of hexagons to rolls begins just at the core of the defect and moves in the direction of the roll belonging to the defect structure.
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Tam, Tammy, Darrick Ohata, and Mingming Wu. "Dynamics of a penta-hepta defect in a hexagonal pattern." Physical Review E 61, no. 1 (2000): R9—R12. http://dx.doi.org/10.1103/physreve.61.r9.

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5

Durniak, C., and D. Samsonov. "Defect dynamics in complex plasmas: Interactions between solitons and penta-hepta defects (dislocations)." EPL (Europhysics Letters) 90, no. 4 (2010): 45002. http://dx.doi.org/10.1209/0295-5075/90/45002.

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GONZÁLEZ-VIÑAS, W., S. CASADO, J. BURGUETE, H. MANCINI, and S. BOCCALETTI. "DEFECT DYNAMICS DURING A QUENCH IN A BÉNARD–MARANGONI CONVECTION SYSTEM." International Journal of Bifurcation and Chaos 11, no. 11 (2001): 2887–94. http://dx.doi.org/10.1142/s0218127401003930.

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We report experimental evidence of defect formation and dynamics in a symmetry breaking transition for a conduction–convection Bénard–Marangoni system. As opposite to the behavior of perfect patterns, defects appear to interact in a spatial region, responsible for the formation of bounded states that survive much longer than the characteristic time scales. The analysis of the transient defect dynamics allows to define this defect interaction region in the space, giving rise to penta–hepta-like defects on top of the hexagonal pattern. Other defect configurations are shown to disappear rapidly e
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7

Azzaz, Hamza, Djaffar Dahmoun, O. Chaterbache, and Mohammed Azzaz. "Prediction of Mechanical Properties of Coiled Carbon Nanotubes by Molecular Structural Mechanics Based Finite Element Modelling." Defect and Diffusion Forum 380 (November 2017): 124–34. http://dx.doi.org/10.4028/www.scientific.net/ddf.380.124.

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Carbon nanotubes (NTC) have very spectacular mechanical properties related to their nanometric structure, their perfect arrangement and their one-dimensional geometry. As with all materials, structural defects are inevitable and affects NTC properties. Among these defects, we distinguish the topological defects, the dislocations and the penta-hepta defect. But the presence of these defects is not totally harmful, because the existence of some structure like the coiled nanotube is the result of these defects. For this, in the first part of this work, the coiled carbon nanotube structure is stud
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8

Tsimring, Lev S. "Dynamics of penta-hepta defects in hexagonal patterns." Physica D: Nonlinear Phenomena 89, no. 3-4 (1996): 368–80. http://dx.doi.org/10.1016/0167-2789(95)00222-7.

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ABOU, BÉRENGÈRE, JOSÉ-EDUARDO WESFREID, and STÉPHANE ROUX. "The normal field instability in ferrofluids: hexagon–square transition mechanism and wavenumber selection." Journal of Fluid Mechanics 416 (August 10, 2000): 217–37. http://dx.doi.org/10.1017/s002211200000882x.

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When a ferrofluid layer is subjected to a uniform and vertically oriented magnetic field, an interfacial instability occurs, above a critical value of the magnetic field, giving rise to a hexagonal array of peaks. On increasing the magnetic field, a smooth morphological transition from the hexagonal array to a square array was observed above a second threshold. The hexagon–square transition phenomenology, in addition to the role of penta–hepta defects initially present in the hexagonal pattern, was investigated. Furthermore, the pattern and wavenumber selection was studied by two different pro
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10

MURUGANANDAM, P., K. MURALI, and M. LAKSHMANAN. "SPATIOTEMPORAL DYNAMICS OF COUPLED ARRAY OF MURALI–LAKSHMANAN–CHUA CIRCUITS." International Journal of Bifurcation and Chaos 09, no. 05 (1999): 805–30. http://dx.doi.org/10.1142/s0218127499000572.

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The circuit recently proposed by Murali, Lakshmanan and Chua (MLC) is one of the simplest nonautonomous nonlinear electronic circuits which show a variety of dynamical phenomena including various bifurcations, chaos and so on. In this paper we study the spatiotemporal dynamics in one- and two-dimensional arrays of coupled MLC circuits both in the absence as well as in the presence of external periodic forces. In the absence of any external force, the propagation phenomena of traveling wavefront and its failure have been observed from numerical simulations. We have shown that the propagation of
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Dissertations / Theses on the topic "Penta-hepta defect"

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Semwogerere, Denis Bbija. "Wave Number Selection and Defect Dynamics in Patterns with Hexagonal Symmetry." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/5300.

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Wave Number Selection and Defect Dynamics in Patterns with Hexagonal Symmetry Denis B. Semwogerere 108 Pages Directed by Dr. Michael F. Schatz We report quantitative measurements of wave number selection, secondary instability and defect dynamics in hexagonal patterns. A novel optical technique ("thermal laser writing") is used to imprint initial patterns with selected characteristics in a B뮡rd-Marangoni convection experiment. Initial patterns of ideal hexagons are imposed to determine the band of stable-pattern wave numbers. For small values of control parameter epsilon the measured st
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