Results 261 to 270 of about 246,659 (296)

Twist defects in helical sonic structures

Physical Review E, 2003
We analyze theoretically both the acoustic wave propagation in periodic media made of anisotropic materials whose stiffness tensor is uniformly rotating along a given axis x(3) and the defect mode produced by twisting about x(3) one part of the helical structure with respect to the other.
C, Oldano, J A, Reyes, S, Ponti
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A Twist in fate: evolutionary comparison of Twist structure and function

Gene, 2002
The general requirement to induce mesoderm and allocate cells into different mesodermal tissues such as body muscle or heart is common in many animal embryos. Since the discovery of the twist gene, there has been great progress toward unraveling the molecular mechanisms that control mesoderm specification and differentiation. Twist was first identified
Irinka, Castanon, Mary K, Baylies
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Twist in Balanced-ply Structures

Journal of the Textile Institute, 1998
The theory of the bending and twisting of thin rods of uniform circular cross-section, and inextensible centre-line, is used to find an equation for the pretwist that must be inserted into the singles strands to create a balanced two-ply yarn of specified ply twist. In the final section, this result is extended to an N-ply structure.
Fraser, W. B., Stump, D. M.
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TWISTED HILBERT SPACES AND UNCONDITIONAL STRUCTURE

Journal of the Institute of Mathematics of Jussieu, 2003
In the paper under review, it is proved that if a Banach space \(X\) with an unconditional basis has a subspace \(E\) such that both \(E\) and \(X/E\) are isomorphically Hilbertian, then \(X\) is also isomorphically Hilbertian. As is well known, for general Banach spaces this is not true; cf. \textit{P. Enflo, J. Lindenstrauss} and \textit{G.
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Ferroelectric twisted liquid crystal structure

Ferroelectrics, 1998
We propose here a new model of molecular distribution in a ferroelectric twisted liquid crystal sample. Whereas Pavel and Patel asserted that the electric field was homogeneous within the bulk, we have rather assumed than the high spontaneous polarisation of the SmC* phase induces a local polarisation charge in space, which destroys the homogeneity of ...
M. Guena, M. Le Gall, L. Dupont
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Twisted structure preserved dinosaur proteins

Nature, 2011
Collagen coils might have kept Tyrannosaurus molecules safe from harm for millions of years.
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Twisting procedure on torogonal structures

Journal of Geometry and Physics, 1994
Let \((E,Q)\) be a pseudo-Euclidean vector space and denote by \((E',Q')\) its complexification. The Clifford group \(\Gamma(Q')\) is the subgroup of the Clifford algebra \(C(Q')\) consisting of the elements \(g\) which satisfy \(\alpha(g)xg^{-1}\in E'\) for all \(x\in E'\): \[ 1\to C^*\to \Gamma(Q')@> p>> O(Q')\to 1. \] Denote by \(N: \Gamma(Q')\to C\)
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Light with twist and structure

Science, 2015
Optics Mobius strips are three-dimensional structures consisting of a surface with just a single side. Readily demonstrated by snipping a paper ring, adding a twist, and then joining the ends of paper together again, these structures have intriguing mathematical properties in terms of topology and geometry. Bauer et al.
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Spin structures with a twist

Physics World, 1990
Puzzling experimental results for the magnetization and magnetic phases of the rare-earth metal holmium, that have lingered unexplained for some 20 years, may now be understood following the discovery of a new type of magnetic structure by Jens Jensen and Allan Mackintosh at the University of Copenhagen, Denmark (1990 Phys. Rev. Lett. 64 2699).
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Structures and functions of coronavirus replication–transcription complexes and their relevance for SARS-CoV-2 drug design

Nature Reviews Molecular Cell Biology, 2021
Brandon Malone, Eric J Snijder, Elizabeth A Campbell   +2 more
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