In this paper, the notion of fully idempotent modules is defined and it is shown that this notion inherits most of the essential properties of the usual notion of von Neumann's regular rings. Furthermore, we introduce the dual notion of fully idempotent modules (that is, fully coidempotent modules) and investigate some properties of this class of modules.

in this paper, the notion of fully idempotent modules is defined and it is shown that this notion inherits most of the essential properties of the usual notion of von neumann's regular rings. furthermore, we introduce the dual notion of fully idempotent modules (that is, fully coidempotent modules) and investigate some properties of this class of modules.

 Let $R$ be a commutative ring with identity and $M$ be a finitely generated unital $R$-module. In this paper, first we give necessary and sufficient conditions that a finitely generated module to be a multiplication module. Moreover, we investigate some conditions which imply that the module $M$ is the direct sum of some cyclic modules and free modules. Then some properties of Fitting ideals o...

 Prime submodules and artinian prime modules are characterized. Furthermore, some previous results on prime modules and second modules are generalized.

Increasingly organizations compete based on time. As a result, cycle-time reduction is a key agenda for organizations interested in achieving increased customer service and reduced cost. With improved cycle time, organizations can often eliminate or reduce inventory while expanding customer service offerings. The purpose of this tutorial is to present the fundamental concepts of cycle time redu...

Research shows that continuing competitive pressure applied during development and production leads to better industry performance, often at reduced cost. However, the entrenched practice of one-time competition for an entire program life-cycle often endows the winner with a very strong monopolistic power that lasts for decades. This paper describes continuous competition as leverage to acquire...