in today’s growing competitive environment, supply chain management has been widely focused by firms as a critical issue. consequently, the organization’s activities are influenced in order to achieving quality improvement, cost reduction and customer satisfaction in production process. recently, pollution and greenhouse effects have focused the researchers’ attention on planning and executing ...

i am delighted to announce completion of the second issue of the new journal of “geopersia”, a product of the new era of replacing the persian language journals with specific english-language ones. our purpose is to provide a journal that offers a multi-disciplinary analysis of issues concerning geology subjects (i.e. sedimentology, stratigraphy, paleontology, petroleum geology, engineering geo...

In today’s competitive market place, companies seek an efficient structure of supply chain so as to provide customers with highest value and achieve competitive advantage. This requires a broader perspective than just the borders of an individual company during a supply chain. This paper investigates an aggregate production planning problem integrated with distribution issues in a supply chain ...

We show that in many applied economic models, it is possible to reduce the dimensionality of the space of actions to what we call “sufficient decisions.” We find that for monopoly and oligopoly in multi-sided markets and multi-product markets, the market equilibrium can be transformed into an equivalent market equilibrium in which each firm makes a single decision. Because profit maximization c...

Abstract: Bi-level programming, a tool for modeling decentralized decisions, consists of the objective(s) of the leader at its first level and that is of the follower at the second level. Three level programming results when second level is itself a bi-level programming. By extending this idea it is possible to define multi-level programs with any number of levels. Supply chain planning problem...

An efficient and environmental-friendly synthetic route to 1,8-dioxodecahydroacridines derivatives have been developed via multi-component one-pot Hantzsch reaction of various aldehydes and ammonium acetate with 2 equivalents dimedone in the presence of Phosphorus pentoxide supported on aluminaas catalyst under solvent-free conditions. The present approach offersseveral advantages such as short...