Silicon Carbide (SiC) is emerging as a promising substrate for systems which leverage the low lattice mismatch with Gallium Nitride (GaN), high power density, heat dissipation and radiation hardness properties unique to this semiconductor. Wafer fabrication and polishing of SiC substrates poses processing issues as a result of the material’s high Mohs hardness (~9.25), and chemical inertness. P...

Self-healing materials with dual interpenetrating microvascular networks enable two-part healing chemistries and repeated healing of damage in a localized region. [ 1 ] However, due to slow healing kinetics, multiple days are required between damage events to recover mechanical performance under ambient conditions. By directly writing a third interdigitated microvascular network within these ep...

Robots based on rigid structural elements—metallic skeletons, electrical motors, conventional mechanical actuators, and mechanical joints—can be superb at performing tasks that require high precision, rapid movement, or application of high levels of force or power. These “hard” robots are, however, often heavy, costly, and diffi cult (and expensive) to control. [ 1–3 ] Hard robots designed to b...

In this research, the breakage susceptibility of two classes of lentil (green and red) was evaluated as affected by impact energy and seed moisture content. The experiments were conducted at impact energies of 0.1, 0.2 and 0.3 J, and moisture contents of 10, 12.5, 15, 17.5, 20 and 25% (wet basis). Results showed that red lentil seeds had more breakage than green seeds and the difference in brea...

Diffusion-weighted imaging(DWI)has revealed the reversal ofoften sizeable damage due to brainstem lesions in patients treated within 4.5 hours, and this reversibility of damage was strongly associated with early neurological improvement.1 In posterior circulation stroke, the reversibility of damage due to aDWI-detected lesion ispoorlydocumentedafter intravenous thrombolysis2 or intraarterial th...

Since magnetism is strongly stress dependent, Magnetic Flux Leakage (MFL) inspection tools have the potential to locate and characterize mechanical damage in pipelines. However, MFL application to mechanical damage detection faces hurdles which make signal interpretation problematic: 1) the MFL signal is a superposition of geometrical and stress effects, 2) the stress distribution around a mech...