Incipient sliding of adhesive contacts

Sliding mode estimation schemes for incipient sensor faults

This paper proposes a new method for the analysis and design of sliding mode observers for sensor fault reconstruction. The proposed scheme addresses one of the restrictions inherent in other sliding mode estimation approaches for sensor faults in the literature (which effectively require the open-loop system to be stable). For open-loop unstable systems, examples can be found, for certain comb...

About contacts of adhesive, elasto-plastic, frictional powders

Granular materials can be studied in a split-bottom ring shear cell geometry, where they show wide shear bands under slow, quasi-static, large deformation. The contact models are at the basis of their interesting collective behavior and flow-rheology as well the core ingredient for the discrete element method (DEM). The contact mechanics used involves elasto-plastic, viscous, frictional, and to...

Rapid assembly of functional presynaptic boutons triggered by adhesive contacts.

CNS synapse assembly typically follows after stable contacts between "appropriate" axonal and dendritic membranes are made. We show that presynaptic boutons selectively form de novo following neuronal fiber adhesion to beads coated with poly-d-lysine (PDL), an artificial cationic polypeptide. As demonstrated by atomic force and live confocal microscopy, functional presynaptic boutons self-assem...

Dynamics of/ 1 Integrin-mediated Adhesive Contacts in Motile Fibroblasts

Motile chick skeletal fibroblasts adhere to a laminin substrate by means of clustered/3~ integrins. These integfin "macroaggregates" are similar to classic focal contacts but do not appear dark under interference-reflection microscopy. They contain ~5 integrin and are associated with extracellular fibronectin. To study their behavior during cell movement, time-lapse, low-light video microscopy ...

Sliding Contacts and the Dynamics of Magnetic Tape Transport