Analytical resolution of complex queuing systems remains nowadays an open and challenging issue and may be extensively used in modeling and representing dynamic behavior of sophisticated systems. This is particularly the case of M/G/c/c+ r queue where exact analytical solution is difficult to reach. In this paper, we propose a new approximate analytical model in order to evaluate the performanc...

Renewable energy planners in developing countries should be cautious in using analytical tools formulated in developed countries. Traditional energy consumption, economic and demography transitions, high-income inequality, and informal economy are some characteristics of developing countries that may contradict the assumptions of mainstream, widely used analytical tools. In this study, we synth...

The present study introduces a generalized 2-unknown’s higher order shear deformation theory (HSDT) for isotropic and orthotropic plates. The well-known Shimpi’s two-unknown's HSDT is reproduced as a special case. Reddy’s shear strain shape function (SSSF) is also adapted to the present generalized theory. The results show that both Shimpi and the adapted Reddy’ HSDT are essentially the same, i...

The volume of information of the most various types stored electronically in a company is increasing to an ever-greater extent. While in the field of operational systems everything is aimed at achieving the quickest possible throughput, in the dispositive field, questions regarding the total overview or detailed views are of interest. OLAP servers are multidimensionally structured. They are the...

Information retrieval (IR) is a key component of knowledge management systems (KMSs). KMSs frequently rely on keyword searches as a primary mechanism for retrieval. While keyword searches are very helpful to knowledge workers, they have their limitations. To illustrate some of the limitations of keyword searches, a database containing all of the articles that have appeared in MIS Quarterly was ...

In this paper we address the issue of conceptual modeling of data used in multidimensional analysis. We view the problem from the end-user point of view and we describe a set of requirements for the conceptual modeling of realworld OLAP scenarios. Based on those requirements we then define a new conceptual model that intends to capture the static properties of the involved information. In its d...

In this paper we investigate a microfluidic device designed for separation of particles having different densities. Separating mechanism employs Standing Surface Acoustic Waves (SSAWs). Simulation studies have shown that Polyethylene microspheres with diameter of 10μm, having a density of 1200 kg/m3, can easily be detected from the same sized Melamine microspheres having a density equal to 1710...

The emerging area of business process intelligence aims at enhancing the analysis power of business process management systems by employing data warehousing and mining technologies. However, the differences in the underlying assumptions and objectives of the business process model and the multidimensional data model aggravate a straightforward solution for a meaningful convergence of the two co...

Often, construction projects fail to achieve their time, budget, and quality goals. This is frequently due to the failure of the contractor to analyze and assess unanticipated risks. The analytic hierarchy process (AHP) is a new approach that can be used to analyze and assess project risks during the bidding stage of a construction project and to overcome the limitations of the traditional appr...

The quasi-linear approximation for electromagnetic forward modeling is based on the assumption that the anomalous electrical field within an inhomogeneous do­ main is linearly proportional to the background (nor ­ mal) field through an electrical reflectivity tensor t In the original formulation of the quasi-linear approxima­ tion, 1 was determined by solving a minimization prob ­ lem based on ...