Results 11 to 20 of about 10,141,921 (243)

Compressive behaviour of cellular structures with aperiodic order

open access: yesResults in Materials, 2022
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R. Moat   +5 more
semanticscholar   +3 more sources

Highly symmetric aperiodic structures -INVITED [PDF]

open access: yesEPJ Web of Conferences, 2021
The symmetries of periodic structures are severely constrained by the crystallographic restriction. In particular, in two and three spatial dimensions, only rotational axes of order 1, 2, 3, 4 or 6 are possible.
Grimm Uwe
doaj   +1 more source

Aperiodicity, Star-freeness, and First-order Logic Definability of Operator Precedence Languages [PDF]

open access: yesLogical Methods in Computer Science, 2023
A classic result in formal language theory is the equivalence among non-counting, or aperiodic, regular languages, and languages defined through star-free regular expressions, or first-order logic.
Dino Mandrioli   +2 more
doaj   +1 more source

Group Theory of Syntactical Freedom in DNA Transcription and Genome Decoding

open access: yesCurrent Issues in Molecular Biology, 2022
Transcription factors (TFs) are proteins that recognize specific DNA fragments in order to decode the genome and ensure its optimal functioning. TFs work at the local and global scales by specifying cell type, cell growth and death, cell migration ...
Michel Planat   +5 more
doaj   +1 more source

Leader-following consensus of second-order multi-agent systems with switching topology and partial aperiodic sampled data

open access: yesAmerican Control Conference, 2021
This article focuses on the problem of leader-following consensus of second-order Multi-Agent Systems (MAS) with switching topology and partial aperiodic sampled data.
S. A. Ajwad   +4 more
semanticscholar   +2 more sources

The Curled Up Dimension in Quasicrystals

open access: yesCrystals, 2021
Most quasicrystals can be generated by the cut-and-project method from higher dimensional parent lattices. In doing so they lose the periodic order their parent lattice possess, replaced with aperiodic order, due to the irrationality of the projection ...
Fang Fang, Richard Clawson, Klee Irwin
doaj   +1 more source

Logical and Algebraic Characterizations of Rational Transductions [PDF]

open access: yesLogical Methods in Computer Science, 2019
Rational word languages can be defined by several equivalent means: finite state automata, rational expressions, finite congruences, or monadic second-order (MSO) logic.
Emmanuel Filiot   +2 more
doaj   +1 more source

Aperiodic order and spherical diffraction, II: translation bounded measures on homogeneous spaces [PDF]

open access: yesMathematische Zeitschrift, 2017
We study the auto-correlation measures of invariant random point processes in the hyperbolic plane which arise from various classes of aperiodic Delone sets. More generally, we study auto-correlation measures for large classes of Delone sets in (and even
Michael Björklund   +2 more
semanticscholar   +1 more source

A sufficient condition for stability of the calculation of parameters of aperiodic processes based on second order difference equations

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2012
The stability problem for the calculation of parameters of the second order damping aperiodic processes is considered. The numerical method of the second order aperiodic process parameters determination, based on iterative procedure of difference equation
Vladimir E Zoteev
doaj   +3 more sources

Aperiodic order induced enhancement of weak nonlocality in multilayered dielectric metamaterials [PDF]

open access: yesPhysical review B, 2018
Recent studies on fully dielectric multilayered metamaterials have shown that the negligibly small nonlocal effects (spatial dispersion) typically observed in the limit of deeply subwavelength layers may be significantly enhanced by peculiar boundary ...
M. Coppolaro, G. Castaldi, V. Galdi
semanticscholar   +1 more source

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