In this article, we investigate the profitability of remanufacturing option when the manufactured and remanufactured products are segmented to different markets and the production capacity is finite. It is assumed that remanufactured products can be substituted by the manufactured ones. A single period profit model under substitution is constructed to investigate the system conditions under whi...

We develop a new scalar migration technique that is highly accurate for imaging steep dips in heterogeneous media. This method is based on arbitrarily wideangle wave equations (AWWEs) that are highly accurate space-domain one-way wave equations and have a form similar to the 15◦ equation. The accuracy of the proposed method is increased by introducing auxiliary variables, as well as adjusting t...

We present two constructions of models of bounded arithmetic, both in the form of a generalization of the ultrapower construction, that yield nonelementary extensions but do not introduce new lengths. As an application we show, assuming the existence of a one-way permutation g hard against polynomial-size circuits, that strictR 2(g) is weaker than R 2(g). In particular, if such a permutation ca...

Simple Effects Following a significant interaction, follow-up tests are usually needed to explore the exact nature of the interaction. Simple effects (sometimes called simple main effects) are differences among particular cell means within the design. More precisely, a simple effect is the effect of one independent variable within one level of a second independent variable. In our hypothetical ...

Article history: Received 17 February 2015 Received in revised form 17 July 2015 Accepted 10 August 2015 Available online 14 August 2015

A zero-dimensional polynomial ideal may have a lot of complex zeros. But sometimes, only some of them are needed. In this paper, for a zero-dimensional ideal I , we study its complex zeros that locate in another variety V(J) where J is an arbitrary ideal. The main problem is that for a point in V(I) ∩ V(J) = V(I + J), its multiplicities w.r.t. I and I + J may be different. Therefore, we cannot ...

We consider the quantized enveloping algebra Uq(sl^2). and its basic module V(Λ0). This is infinite-dimensional, irreducible, integrable, highest-weight. describe V(Λ0) using a q-shuffle in following way. Start with free associative V on two generators x, y. The standard basis for consists of words In 1995 M. Rosso introduced an structure V, called algebra. For u, v ∈ {x, y} their product u ⋆ =...