Locate an area that has been relatively undisturbed by human activity. There should be many fallen leaves, twigs and pieces of bark. Remember to have a partner with you at all times. â¢ Once you've found a suitable patch of leaf litter, measure out an area of one meter squared using the meter stick.n the areas with lots of human interference, human activity has contributed to a lower biodiversity. People might litter on the ground or simply step on animals. Other times, people may add chemical fertilizers and pesticides to the soil.
Accreditation Review Council on Education in Surgical Technology and Surgical Assisting. The ARC/STSA establishes, maintains, and promotes quality standards for education programs in surgical technology and surgical first assisting.
Introduction. RSA is a powerful research technique that is currently being studied at Hospital for Special Surgery (HSS) for joint replacement patients. RSA stands for r adio s tereometric a nalysis, which describes a special way of taking two x-rays from different directions at the same time, creating a âstereoâ image.SA has been used for over 30 years in Europe and for 5 years at Hospital for Special Surgery. The only potential risks come from implantation of the marker beads. 1  The insertion of beads takes an additional 5 to 10 minutes of surgery.