Deformation of the Zurich cementless acetabular cup caused by implantation in a canine cadaver model.

Objective: To evaluate the change in geometry of the Zurich total hip arthroplasty (THA) acetabular component after implantation.

Animals: Hemipelves from adult mix-breed dogs weighing between 20 and 25 kg.

Methods: Digital image correlation imaging was performed prior to, immediately after, and 24 hours after impaction of Zurich THA acetabular component, and after removal of the cup from the specimen.

Estimating distribution of hidden objects with drones: from tennis balls to manatees.

Unmanned aerial vehicles (UAV), or drones, have been used widely in military applications, but more recently civilian applications have emerged (e.g., wildlife population monitoring, traffic monitoring, law enforcement, oil and gas pipeline threat detection).

Understanding stress concentration about a nutrient foramen.

We investigated the microstructural basis of a reduced stress concentration around the primary nutrient foramen of the equine third metacarpus. We quantified the spatial variations of compositional parameters (mineral content, volume fraction, histological architecture, and osteonal trajectories) from microradiographs and polarizing microscopic images of thin sections. These variations in composition and organization in turn cause variations in mechanical properties of cortical bone.