A model calculation of the square membrane superstructure of some mixed lipid bilayers is presented. It involves bending elasticity of higher than quadratic order in the principal curvatures and employs Monte Carlo simulation.

The vibration impact force from the long-term operation of a subway affects comfort residents living above superstructure and settlement deformation tunnel foundation. A method for evaluating dynamic responses superstructure–tunnel systems is important, especially because randomness force. coupling effect train-vibration excitation nonlinearity geotechnical properties that are subjected to acti...

Based on high-resolution noncontact atomic force microscopy (NC-AFM) experiments we reveal a detailed structural model of the polar (111) surface of the insulating ternary metal oxide, MgAl(2)O(4) (spinel). NC-AFM images reveal a 6√3×6√3R30° superstructure on the surface consisting of patches with the original oxygen-terminated MgAl(2)O(4)(111) surface interrupted by oxygen-deficient areas. The...