Most researchers believe that Olde Robert Selfe was the ancestor of most of the Self family in America. Arriving in Virginia in the 1600s, Robert Selfe appears to have been descended from Walter Selfe of Cripplegate, London, England. The name Self is thought to be a shortened version of Seawolf, dating back to the early Viking voyages along the English coast.
A stress reaction is the lowest grade of the three levels of bone injury. A stress reaction is essentially the early stages of a stress fracture. This occurs when the stresses affecting the bone occur at a faster rate than the rate at which the bone is able to rebuild itself.
Stress = Force/Area. Strain = A change in shape or volume in response to a stress. Stress is the cause, strain is the effect! There are three types of stress : 1) Compressive stress Forces that squeeze or push toward one another from opposite directions (cause shortening or flattening).2) Tensional stress Forces that pull away from one another in opposite directions (cause stretching or extension).tress = Force/Area. Strain = A change in shape or volume in response to a stress. Stress is the cause, strain is the effect! There are three types of stress : 1) Compressive stress Forces that squeeze or push toward one another from opposite directions (cause shortening or flattening).