geometrically nonlinear governing equations for a plate with linear viscoelastic material are derived. the material model is of boltzmann superposi¬tion principle type. a third-order displacement field is used to model the shear deformation effects. for the solution of the nonlinear governing equations the dynamic relaxation (dr) iterative method together with the finite difference discretizati...

Self-actuating materials capable of transforming between three-dimensional shapes have applications in areas as diverse as biomedicine, robotics, and tunable micro-optics. We introduce a method of photopatterning polymer films that yields temperature-responsive gel sheets that can transform between a flat state and a prescribed three-dimensional shape. Our approach is based on poly(N-isopropyla...

The Chern insulator displays a quantum Hall effect with no net magnetic field. Proposed by Haldane over 20 years ago, it laid the foundation for the fields of topological order, unconventional quantum Hall effects, and topological insulators. Despite enormous impact over two decades, Haldane's original vision of a staggered magnetic field within a crystal lattice has been prohibitively difficul...

A single graphene sheet is stacked on top of monolayer MoS2. The 2D heterostructure buckled out-of-plane, inducing bending in both layers. In article number 2007269, Arend M. van der Zande, Pinshane Y. Huang, and co-workers study the impact interfacial engineering tunability stiffness multilayers. model developed to predict design deformability any arbitrary heterostructure.

The title copper(I) salt, (C(15)H(14)N(2))[Cu(NCS)(3)], exists as non-inter-acting cations and trigonal-planar anions. The cation is buckled, the r.m.s. deviation of the atoms passing through the phenanthroline portion being 0.16 Å. The Cu(I) atom is displaced by 0.019 (2) Å out of the N(3) triangle. The crystal studied was a non-merohedral twin with twin domains in an approximate ratio of 55:45.

This paper delineates a class of time-periodically perturved evolution equations in a Banach space whose associated Poincaré map contains a Smale horseshoe. This implies that such systems possess periodic orbits with arbitrarily high period. The method uses techniques originally due to Melnikov and applies to systems of the form ẋ = f0(x) + εf1(x, t), where ẋ = f0(x) is Hamiltonian and has a ho...

In the title compound, C(22)H(14)BrN(3), the fused-ring system is buckled owing to the ethyl-ene linkage in the central ring; the two flanking aromatic rings are twisted by 25.9 (1) ° with respect to each other. The phenyl ring is twisted by 77.0 (1)° relative to the amino- and cyano-bearing aromatic ring. In the crystal, adjacent mol-ecules are linked by two N-H⋯N hydrogen bonds, generating a ...