We study the critical stochastic q-state Potts model on the square lattice. Unlike the expected behavior when the phase transition is continuous (q = 2, 3, 4)—a universal power-law for the mixing time independently of the boundary conditions— the mixing time at a discontinuous phase transition, tmix, is highly sensitive to those. It was recently shown by the authors that tmix ≥ exp(cn) on an n×...

The pull-in voltage of a single-side anchored freestanding beam, under lateral deflection, has been investigated for application as a dc voltage reference. Two sets of electrodes, alongside the tip, are used for parallel-plate type of electrostatic actuation of the 200 m long beam in the plane of the wafer. Another set of buried electrodes is aligned with the plate electrode at the free-standin...

MEMS electrostatic actuators suffer from pull-in instability, making them highly nonlinear and limiting their useful range of motion. This report resolves the performance-limiting issues gap-closing transducer by using an ultrathin dielectric layer (UDL) for actuation. The device has electromechanical coupling coefficient 4.26% average deflection sensitivity 119 nm/V over a 350 nm upto 3.3 V dc...

this paper analyses and compares the performances of business-to-business e-commerce data quality and service quality among the use of the ‘push’ and ‘pull’ models. rosettanet’s original partner interface processes use the ‘push’ model which suffers from data redundancy when the volume of business-to-business transaction increases. however, when the ‘pull’ model is used, although it reduces dat...

We present a set of interactive, free-form editing operators for direct manipulation of level-set models. The mathematics, algorithms and techniques needed to implement numerous level-set modeling capabilities have been developed. The operators have been combined with an OpenGL interface and the VISPACK level-set library to create a preliminary interactive level-set modeling system. VISPACK’s n...

this work reports the effect of nanotube aspect ratio and waviness index on stress and displacement distributions of functionally graded nanocomposite cylinders reinforced by wavy single walled carbon nanotubes based on a mesh-free method. the mechanical properties of these composites are assumed to be graded along radial direction and estimate by a micro mechanical model. in the mesh-free anal...

An equivalent continuum model based on the Eshelby-Mori-Tanaka approach was employed to estimate the effective constitutive law for an elastic isotropic medium (i.e., the matrix) with oriented straight carbon nanotubes (CNTs). The two-dimensional generalized differential quadrature method was an efficient and accurate numerical tool for discretizing equations of motion and for implementing vari...

Atomic force microscopy (AFM) is capable of solid surface characterization at the microscopic and submicroscopic scales. It can also be used for the determination of surface tension of solids (gamma) from pull-off force (F) measurements, followed by analysis of the measured F values using contact mechanics theoretical models. Although a majority of the literature gamma results was obtained usin...

Bone screw fixation can be estimated with several test methods such as insertion torque, pull-out, push-in and bending tests. A basic understanding of the relationship between bone microstructure is still lacking. Computational models help clarify this relationship. The objective paper to evaluate homogenized finite element (hFE) pull-out. Experimental pull-out tests were performed on three mat...