We consider a family of nonlocal capillarity models, where surface tension is modeled by exploiting the family of fractional interaction kernels |z|−n−s, with s ∈ (0, 1) and n the dimension of the ambient space. The fractional Young’s law (contact angle condition) predicted by these models coincides, in the limit as s → 1−, with the classical Young’s law determined by the Gauss free energy. Her...

The stick-to-slip transition of a fingertip in contact with a planar surface does not occur instantaneously. As the tangential load increases, portions of the skin adhere while others slip, giving rise to an evolution of the contact state, termed partial slip. We develop a quasi-static model that predicts that if the coefficient of kinetic friction is larger than the coefficient of static frict...

Obtaining accurate vehicle driving state and road adhesion coefficient information is of great significance to many aspects the vehicle. This paper takes distributed drive electric vehicles as research object designs a joint estimation method based on theory federated-cubature Kalman filter. The corresponding nonlinear three-degree-of-freedom dynamics model established space equation obtained. ...

BACKGROUND AND PURPOSE Modifications of aneurysm occlusion devices and other biologically active molecules may reduce the risk of recanalization by promoting vascular cell migration, adhesion, and proliferation. Our purpose was to apply in vitro methods in the qualitative and quantitative analysis of vascular smooth muscle cell (VSMC) interactions with collagen-impregnated microcoils. METHODS...

In this study, the adhesion of bacteria differing in surface hydrophobicity was investigated. Cell wall hydrophobicity was measured as the contact angle of water on a bacterial layer collected on a microfilter. The contact angles ranged from 15 to 70 degrees. This method was compared with procedures based upon adhesion to hexadecane and with the partition of cells in a polyethylene glycol-dextr...

Abstract Hydrophilic polymer coatings on artificial implants generate excellent tribological properties. The friction properties of are affected by salt ion factors. Herein, the atomic force microscopy (AFM) was used to show that superlubricity achieved between poly(vinylphosphonic acid) (PVPA)-modified Ti6Al4V and polystyrene (PS) microsphere probe lubricated with monovalent solutions (LiCl, N...

This paper presents some quantitative measurements of the adhesion energy thin WTi films deposited on Si substrate. Two different techniques are applied to same sample series. One is a mechanical test based analysis spontaneously formed defects. The second acoustic waves whose reflection at interface between thin-film and substrate sensitive adhesion. An excellent correlation obtained both appr...