APPLIED MATHEMATICS Correction for ‘‘On the behavior of a capillary surface in a wedge,’’ by Paul Concus and Robert Finn, which appeared in issue 2, June 1, 1969, of Proc Natl Acad Sci USA (63:292–299). Owing to a printer’s error, the initial sentence of the abstract appeared as ‘‘Estimates above and below are obtained for the height of the equilibrium-free surface of a liquid’’ rather than the...

We consider here the interaction of direct and inverse cascades in a hierarchical nonlinear system that is continuously loaded by external forces. The load is applied to the largest element and is transferred down the hierarchy to consecutively smaller elements, thereby forming a direct cascade. The elements of the system fail (i. e., break down) under the load. The smallest elements fail first...

this research examines dynamics and change in the iranian family during the recent half- century especially subsequent to the islamic revolution in 1979. developmental positions and changes are discussed and consideration is given to the extent to which family dynamics and change have been influenced by structural changes or ideational forces. we will focus on ideational forces based on a new a...

We study numerically the glass formation and depinning transition of a system two-dimensional cluster-forming monodisperse particles in presence pinning disorder. The pairwise interaction potential is nonmonotonic, motivated by intervortex forces type-$1.5$ superconductors. Such systems can form cluster glasses due to interactions following thermal quench, without underlying effects vortex thes...

A simplified (one step) method called “inverse approach” (IA) for the numerical analysis of the stamping process has been continuously developed by the authors since the end of the eighties. In the present paper we recall the main finite element formulation aspects, for an efficient estimation of the large elastoplastic strains encountered in deep drawing operations. The capabilities of the cod...

Connective tissue extracellular matrices define and maintain shape. Collagen fibrils transmit and resist pulling forces and soluble interfibrillar carbohydrate-rich polymers (anionic glycosaminoglycans AGAGs) resist compressive forces. This article shows that AGAGs (chondroitin, dermochondan and keratan sulphates) form supramolecular organisations which take tensile stresses as well, helping to...

Microfluidic channels functionalized with adhesive ligands are versatile platforms for cell separation in a variety of applications. However, not much is known about how the adhesiveness of targeted cell types can vary within such channels due to the combined influence of fluid shear forces and exposure to ligands. Using microfluidic channels and the tetrapeptide ligand arg-glu-asp-val (REDV), ...

Although object handover between people is a commonly performed task, little about underlying control mechanisms is known. The present study examined haptic contributions in object handover. On each trial one participant held an object and passed it to the other participant at self-selected, fixed or randomly varied positions. In some trials, the receiver wore a glove to attenuate tactile infor...

The flow properties of powders are mainly due to the interplay of cohesive forces and intergrain frictional forces. We have experimentally investigated a "smart granular system" for which the interparticle cohesion can be tuned by a magnetic field B[over ] . We show that the rheological features of such a system can be controlled. Indeed, the granular flow can be controlled or even stopped by t...