adsorption is a fundamental process in the physicochemical treatment of wastewaters which industries employ to reduce hazardous organic and inorganic wastes in effluents. in recent years the use of low-cost adsorbents has been widely investigated as a replacement for the currently costly methods of removing heavy metal ions from wastewater. it is well-known that cellulosic waste materials can b...

in today’s dynamic market, organizations must be adaptive to market fluctuations. in addition, studies show that material-handling cost makes up between 20 and 50 percent of the total operating cost. therefore, this paper considers the problem of arranging and rearranging, when there are changes in product mix and demand, manufacturing facilities such that the sum of material handling and rearr...

three k-tree distance and fixed-sized plot designs were used for estimating tree density in sparse oak forests. these forests cover the main part of the zagros mountain area in western iran. they are non-timber-oriented forest but important for protection purposes. the main objective was to investigate the statistical performance of k-tree distance and fixed-sized plot designs in the estimation...

The information technology (IT) management has become one of the critical factors that enterprises want to assess the business benefits and performances of ERP systems. This research tries to evaluate the relationship between ERP continuous investment and technical efficiency by using DEA approach. This study also utilizes the Tobit regression to investigate the relationship between efficiency ...

The current methods of effort estimation frequently take indirect account of the tasks of software performance engineering (SPE), and provide widely differing conclusions. In order to create transparency and acceptance for this task that has been growing in importance for years in the context of the life cycle of IT systems, an approach (PRM Performance Risk Model) is adopted that derives resou...

A major challenge in telecommunication design is introducing flexibility while still meeting real-time performance goals. Keeping both flexibility and performance while minimizing cost, leads to mixed hardware-software systems. In the absence of a generic partitioning algorithm, accurate cost and performance modeling become crucial when exploring architectural alternatives. This paper presents ...