The stability of the interface between mortar and rock is very important in engineering construction. In this paper, all-digital acoustic emission (AE) system used to detect direct shear test mortar-rock binary medium with different sawtooth angles under normal stress states. stress-displacement information AE signal during whole shearing process are extracted. coupling relationship characteris...

forty sheep skins were allocated into two groups. group one was sheared using shearing machine and group two was chemically dewooled using 15 percent sodium sulfide. results indicated that fibre diameter of slipewool (39.3 ± 2.3 µm) was significantly (p< 0.05) higher than the sheared wool fibers (36.3 ± 0.7 µm), but staple length of slipewool (3.3 ± 0.7 cm) was significantly (p< 0.05) lower tha...

Re-attachement of tooth fragment is today the first choice for restoring fractured teeth, whether or not the technique is combined with resin composites. This offers several advantages over conventional acid-etch composite restorations. Improved esthetics is obtained since the original shape, color, brightness and surface texture of enamel are Abstract The reattachment of dental fragments, as a...

We carried out pointwise local velocity measurements on 40 mM cetylpyridinium chloride-sodium salicylate (CPyCl-NaSal) wormlike micellar solution using high-frequency ultrasound velocimetry in a Couette shear cell. The studied wormlike solution exhibits Newtonian, shear-thinning and shear-thickening rheological behavior in a stress-controlled environment. Previous rheology, flow visualization a...

We study the shearing of polydisperse and bidisperse media with a size ratio of 10. Simulations are performed with a two-dimensional shear cell using contact dynamics. With a truncated power law for the polydisperse media we find that they show a stronger dilatancy and greater resistance to shearing than bidisperse mixtures. To model additives used to control viscosity we introduce so-called "p...

Observations show that plasma crystals, suspended in the sheath of a radio-frequency discharge, rotate under the influence of a vertical magnetic field. Depending on the discharge conditions, two different cases are observed: a rigid-body rotation (all the particles move with a constant angular velocity) and sheared rotation (the angular velocity of particles has a radial distribution). When th...

The paper discusses the limitations of current HCI design methods to effectively support the design of new artifacts which radically change the ecology of practice. The notions of catachresis and utilization schemes are used to describe the changing ecology of practice. The hierarchical model of shearing layers is proposed as a useful tool to support the required designer’s consideration of evo...