Descriptive epidemiology The measures employed are incidence and prevalence. A first step in descriptive epidemiology is to obtain a valid definition of what constitutes a “case.” Quite surprisingly, up to now, no widely employed diagnostic criteria have been developed for clinical and population based studies of psoriasis. The first diagnosis made by a physician and the first appearance of ski...

The increasing diffusion of automation in all sectors of the industrial world gives rise to a deep modification of labor organization and requires a new approach to evaluate industrial systems efficiency, effectiveness, and economic convenience. Until now, the evaluation tools and methods at disposal of industrial managers are rare and even complex. Easy-to-use criteria, possibly based on robus...

government, now, more than the fist half of 20th century, have accepted. reducing poverty as an inevitably and necessary object. implementing poverty reduction programs would not he as succesful as, without paying enought attention to the dimentions of poverty. in this way estimating poverty line and percent ofpoor people are of the most favorable measures. also we would he enable to make more ...