Not all ball-screw makers spec products the same way. Stiffness or rigidity is a key factor in evaluating ball-screw drives for specific needs. Rigidity, in this context, describes a ball screw's ...

Cogwheeling is a type of rigidity seen in people with Parkinson’s disease. It’s often an early symptom of Parkinson’s, and it may be used to make a diagnosis. Cogwheeling, also known as cogwheel ...

Psychological entropy is uncertainty-driven anxiety about ever-increasing disorder in complex modern living, rife with social, environmental, and technological changes. Psychological rigidity is ...

Figure 1. Cognitive Rigidity is one element in a challegning suite of traits and behaviors. For details, see text. Figure (c) James Coplan, MD, used by permission.B Source: James Coplan, MD When I was ...