Data Envelopment Analysis (DEA) as a non–parametric method is used to measure relative performance of organizational units. The aim of this paper is to develop a new model to evaluate the efficiency of a general two-stage network structures proposed by Li et al.  (2012) for measuring the performance of Decision Making Units (DMUs). In addition, this paper expands the work of Li et al. (2012) an...

Identifying the best way to organize the IS functions within an interprise has been a critical IS management issue since the mid-1980s. Yet to date, MIS researchers have offered little empirical evidence on which to base guidelines for the practitioner. This study seeks to explain a firm’s IS organization design decision for a decentralized, centralized, or "hybrid" locus of responsibility from...

Cost efficiency measures the cost of resource by output production. While conventional cost efficiency models set targets separately for each DMU, There are cases where the Central decision making is seeking the above targets, and at the same tries to obtain the target of Min cost efficiency for the total consumption. in this paper we consider that there is a centralized decision maker (DM). In...

Most current schemes for multicast routing assume that multicast routers participate both in forwarding mul-ticast packets and in control algorithms for routing, resource reservation, and group management. By separating data and control ow, and by centralizing control in distinct control elements, we have designed a simple and scalable approach to IP multicast that we call Centralized Multicast...

The processing of k-NN queries has been studied extensively both in a centralized computing environment and in a structured P2P environment. However, the problem over an unstructured P2P system is not well studied despite of their popularity. Communication-efficient processing of k-NN queries in such an environment is a unique challenge due to the distribution, dynamics and large scale of the s...

Abstract In a vertically related duopoly with input price bargaining, this paper re-examines the downstream firms’ profitability under different market competition degrees. It is shown rather counterintuitive result that firms earn highest profits semi-collusion, whose level depends on upstream bargaining structures, relative parties’ power, and parameters measuring degree of product differenti...

Spanish Society of Hospital Pharmacy (SEFH) includes among its purposes and functions the promotion, fostering and furthering of the performance of all kinds of training programmes and scientific projects, together with research and innovation activities in the area of Hospital Pharmacy. These actions are directed both to their development as well as to their appropriate applications, with the ...

Due to the rapid development of VLSI technology, computing systems can be made much more distributed and to match the structures of the problems for various applications. Because the characteristics of distributed computing systems are significantly different from those of centralized computing systems, different a,pproaches are needed to effectively address t,he design issues related to the ch...

Most current s c hemes for multicast routing assume that multicast routers participate both in forwarding mul-ticast packets and in control algorithms for routing, resource reservation, and group management. By separating data and control ow, and by c e n tralizing control in distinct control elements, we h a ve designed a simple and scalable approach t o I P m ulticast that we call Centralized...