It is shown that it is possible to obtain complete planar phononic bandgaps in square and hexagonal (honeycomb) lattice phononic crystals formed by etching a periodic array of circular holes in a thin silicon plate (or membrane). Also, better bandgap properties are obtained using the hexagonal lattice structure; and, with practical structure sizes, it is possible-to-obtain a gap-to-midgap ratio...

The honeycomb mesh, based on hexagonal plane tessellation, is considered as a multiprocessor interconnection network. A honeycomb mesh network with n nodes has degree 3 and diameter a 1.63 n 1, which is 25 percent smaller degree and 18.5 percent smaller diameter than the mesh-connected computer with approximately the same number of nodes. Vertex and edge symmetric honeycomb torus network is obt...

Novel tetrachiral honeycomb structures are evaluated for the first time from the vibroacoustic point of view. A numerical method based on Bloch wave approximations for Finite Element models of the unit cells is applied to simulate the pass-stop band characteristics of these cellular solids. Experimental modal analysis and modal densities are measured on honeycomb panels and sandwich plate, and ...

The classical ground state of a system of dipoles arranged on a 2D honeycomb lattice is rigorously shown to be a (1/3,−1/3) structure. This configuration exhibits a continuous degeneracy with respect to rotations of the two hexagonal sublattices in opposite directions. These results are in agreement with observations on ErBr3, suggesting that dipolar interactions are dominant in the latter comp...

From the *Cardiovascular Center, Sendai Kousei Hospital, Aoba-ku, Sendai, Miyagi, Japan; and the yDivision of Cardiology, Sanyudo Hospital, Yonezawa, Yamagata, Japan. The authors have reported that they have no relationships relevant to the contents of this paper to disclose. Manuscript received April 17, 2013; accepted April 25, 2013. An electrocardiogram showed negative T in leads II, III, aV...

Negative Poisson ratio (NPR) materials based on a re-entrant honeycomb structure expand in the direction perpendicular to an externally exerted tension. This feature makes NPR structures attractive for use in microsensors and actuators as versatile motion transformers. When implemented in microdevices, where slender and flexible micromachined elements are widely used, the NPR material can toler...

This projects attempts to simulate accurately the thermal conductivity of honeycomb panels in the normal direction. Due to the large empty space of the honeycomb core, the thermal radiation mode of heat transfer was modeled along with conduction. Using Newton’s Method to solve for a steady state model of heat moving through the honeycomb panel, the theoretical effective thermal conduction of th...

Incomplete coverages of p-fluorothiophenol, p-chlorothiophenol, and p-bromothiophenol form ordered islands on a Cu(111) surface even at low temperatures. The complexity of the molecular patterns increases from a simple (3 x 4) superlattice to a honeycomb (8 x 8)R19 degrees structure with increasing substituent electronegativity. We propose a model based on quadrupolar intermolecular interaction...

We report on a method for the realization of two-dimensional electrostatic lattices for excitons using patterned interdigitated electrodes. Lattice structure is set by the electrode pattern and depth of the lattice potential is controlled by applied voltages. We demonstrate square, hexagonal, and honeycomb lattices created by this method.VC 2012 American Institute of Physics. [doi:10.1063/1.368...

A new class of auxetic materials, a hexachiral honeycomb structure with good mechanical properties, is investigated through computer simulation and measurement. The electromagnetic properties for shielding applications are taken into account. This new material shows some interesting EMC properties (e.g. -40dB transmittance @ 2.4GHz) and promises better performance using different insertion tech...