Failure mode and effects analysisFailure mode and effects analysis (FMEA; often written with "failure modes" in plural) is the process of reviewing as many components, assemblies, and subsystems as possible to identify potential failure modes in a system and their causes and effects. For each component, the failure modes and their resulting effects on the rest of the system are recorded in a specific FMEA worksheet. There are numerous variations of such worksheets.
Rough setIn computer science, a rough set, first described by Polish computer scientist Zdzisław I. Pawlak, is a formal approximation of a crisp set (i.e., conventional set) in terms of a pair of sets which give the lower and the upper approximation of the original set. In the standard version of rough set theory (Pawlak 1991), the lower- and upper-approximation sets are crisp sets, but in other variations, the approximating sets may be fuzzy sets. The following section contains an overview of the basic framework of rough set theory, as originally proposed by Zdzisław I.
History of SenegalThe history of Senegal is commonly divided into a number of periods, encompassing the prehistoric era, the precolonial period, colonialism, and the contemporary era. The earliest evidence of human life is found in the valley of the Falémé in the south-east. The presence of man in the Lower Paleolithic is attested by the discovery of stone tools characteristic of Acheulean such as hand axes reported by Théodore Monod at the tip of Fann in the peninsula of Cap-Vert in 1938, or cleavers found in the south-east.
