In this paper we introduce the optimal solution for a simple and yet practical inventory policy with the important characteristic which eliminates the uncertainty in demand for suppliers. In this new policy which is different from the classical inventory policies, the time interval between any two consecutive orders is fixed and the quantity of each order is one. Assuming the fixed ordering cos...

THE AORTA is a single structure and serves to conduct oxygenated blood at systemic pressure all regions of the body. The principles aortic interventions (endo- or extravascular) should, therefore, not differ according which term medical school study in they fall, pathology need be compartmentalized for its different sections, by specialties. Equally, anesthesia surgery divided into cardiac thor...

The past decade has seen the emergence of programs that make use of large knowledge bases to assist physicians in diagnosis within the general field of internal medicine. One such program, Internist-I, contains knowledge about over 600 diseases, covering a significant proportion of internal medicine. This paper describes the process of converting a subset of this knowledge base--in the area of ...