Epidemiology is concerned with the incidence of disease in populations and does not address the question of the cause of an individual's disease.This question, sometimes referred to as specific causation, is beyond the domain of the science of epidemiology.he subdiscipline of forensic epidemiology is directed at the investigation of specific causation of disease or injury in individuals or groups of individuals in instances in which causation is disputed or is unclear, for presentation in legal settings.
Major system characteristics. Tacan stands for Tactical Air Navigation and is a system which, working in the u.h.f. band, between 962 and 1,214 Mc/s, gives to a pilot continuous information as to his range and bearing from a beacon.
The TAVR procedure allows physicians to replace a diseased aortic valve without open-heart surgery. This procedure enables the placement of a heart valve into the body with a catheter, which allows the valve to be inserted through a small incision into an artery.he TAVR procedure generally is performed in much less time than open-heart surgery. Additionally, open-heart surgery can require a two-to three-month recovery period, compared to the recovery period of only a few days with the transcatheter approach.