The recurrent activity of radio AGN, with phases of activity alternating with Baby Shower Cards periods of quiescence, has been known since the early studies of these objects.The full relevance of this cycle is emphasised by the requirement, from the AGN feedback scenario, of a recurrent impact of the energy released by the SMBH during the lifetime

Abstract Precise cost estimation is the first and crucial step for decision-makers at the Baby Shower Cards planning stage of product development.Due to the unavailability of knowledge and the complex nature of manufacturing processes, materials, and product designs, the selection of suitable alternatives based on estimated cost has become more cha